WO2020071502A1 - Ue - Google Patents
UeInfo
- Publication number
- WO2020071502A1 WO2020071502A1 PCT/JP2019/039184 JP2019039184W WO2020071502A1 WO 2020071502 A1 WO2020071502 A1 WO 2020071502A1 JP 2019039184 W JP2019039184 W JP 2019039184W WO 2020071502 A1 WO2020071502 A1 WO 2020071502A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pdu session
- congestion management
- identification information
- network
- procedure
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/18—Management of setup rejection or failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the 3GPP (3rd Generation Partnership Project), which carries out standardization activities for mobile communication systems in recent years, is studying SAE (System Architecture Evolution), which is a system architecture of LTE (Long Term Evolution).
- SAE System Architecture Evolution
- LTE Long Term Evolution
- EPS Evolved Packet System
- EPC Evolved @ Packet @ Core
- 5G Next-generation mobile communication system
- 5G System 5th Generation
- optimization and diversification of communication procedures to support continuous mobile communication services according to terminals that support a wide variety of access networks, and system architectures tailored to optimization and diversification of communication procedures Optimization is also mentioned as a requirement.
- Non-Patent Documents 1 and 2 in addition to a mechanism that provides a function equivalent to congestion management, control signal management based on reasons other than congestion management is being studied ⁇ (see Non-Patent Documents 1 and 2).
- the operation processing related to the session management of the terminal that has received the reason that the network notifies the terminal to apply the control signal management based on the reason other than the congestion management is not clear. Further, as in the case of the congestion management, the backoff timer management process when the backoff timer is notified to the terminal is not clear.
- One aspect of the present invention has been made in view of such circumstances, and an object thereof is to provide a mechanism and a communication control method for implementing a control signal management process based on a reason other than congestion management. is there.
- UE User @ Equipment; terminal device
- the transmission unit transmits an initial PDU session establishment request message when the received 5GSM reason value indicates PDU ⁇ session ⁇ does ⁇ not ⁇ exist. It is characterized by.
- UE of the present invention comprises a receiving unit and a control unit, the receiving unit, when receiving a 5GSM reason value and timer indicating Request rejected, unspecified, the control unit, the control unit, the 5GSM reason value is related to congestion management When indicating other than the reason value, a back-off timer for a combination of PLMN, DNN and S-NSSAI is started based on the 5GSM reason value.
- UE of the present invention comprises a receiving unit and a control unit, when the receiving unit receives a 5GSM reason value and a timer, the control unit, if the 5GSM reason value indicates other than the reason value related to congestion management And activating a back-off timer for a combination of PLMN, DNN and S-NSSAI based on the 5GSM reason value.
- the UE of the present invention includes a control unit, wherein the control unit ignores the received back-off timer when the received 5GSM reason value indicates a reason value other than congestion management.
- a terminal device configuring 5GS or a device in a core network performs management processing such as congestion management for each network slice and / or DNN or APN under the initiative of the terminal device or the network. can do.
- FIG. 1 is a diagram schematically illustrating a mobile communication system.
- FIG. 2 is a diagram illustrating an example of a configuration of an access network in a mobile communication system.
- FIG. 2 is a diagram illustrating an example of a configuration and the like of a core network_A in a mobile communication system.
- FIG. 3 is a diagram illustrating an example of a configuration and the like of a core network_B in a mobile communication system.
- FIG. 3 is a diagram illustrating a device configuration of a UE.
- FIG. 3 is a diagram illustrating a device configuration of eNB / NR @ node.
- FIG. 3 is a diagram illustrating a device configuration of an MME / AMF.
- FIG. 1 is a diagram schematically illustrating a mobile communication system.
- FIG. 2 is a diagram illustrating an example of a configuration of an access network in a mobile communication system.
- FIG. 2 is a diagram illustrating an example of a configuration and the like of
- FIG. 3 is a diagram showing a device configuration of SMF / PGW / UPF. It is a figure showing an initial procedure. It is a figure showing a registration procedure. It is a figure which shows the PDU session establishment procedure. It is a figure which shows the session management procedure led by the network.
- FIG. 2 is a diagram illustrating details of an access network in the mobile communication system of FIG.
- FIG. 3 is a diagram mainly describing details of core network_A90 in the mobile communication system of FIG.
- FIG. 4 is a diagram mainly describing details of core network_B190 in the mobile communication system of FIG.
- a mobile communication system 1 in the present embodiment includes a terminal device (also referred to as a user device or a mobile terminal device) UE (User Equipment) _A10, an access network (AN; Access Network) _A, and an access network_B.
- UE User Equipment
- AN Access Network
- B access network_B
- the combination of the access network_A and the core network_A90 may be referred to as EPS (Evolved Packet System; 4G mobile communication system), or the combination of the access network_B, the core network_B190, and the UE_A10 may be referred to as 5GS (5G System 5G mobile communication system), and the configurations of 5GS and EPS need not be limited to these.
- the core network _A90, the core network B or a combination thereof may be referred to as a core network
- the access network _A, the access network _B or a combination thereof may be referred to as an access network or a radio access network.
- DN_A5, PDN_A6, or a combination thereof may also be referred to as DN.
- UE_A10 can be connected to a network service through 3GPP access (also referred to as 3GPP access or 3GPP access network) and / or non-3GPP access (also referred to as non-3GPP access or non-3GPP access network).
- UE_A10 may include a UICC (Universal Integrated Circuit Card) or an eUICC (Embedded UICC).
- UE_A10 may be a terminal device that can be wirelessly connected, and may be a mobile equipment (ME), a mobile station (MS), a cellular internet of things (CIoT) terminal (CIoT UE), or the like.
- ME mobile equipment
- MS mobile station
- CIoT cellular internet of things terminal
- UE_A10 can also be connected to an access network and / or a core network. Further, UE_A10 can be connected to DN_A and / or PDN_A via an access network and / or a core network. UE_A10 transmits and receives user data to and from DN_A and / or PDN_A using a PDU (Protocol Data Unit or Packet Data Unit) session and / or a PDN (Packet Data Network) connection (also referred to as a PDN connection). ). Further, the communication of user data is not limited to IP (Internet Protocol) communication (IPv4 or IPv6) .For example, EPS may be non-IP communication, or 5GS may be Ethernet (registered trademark) communication or Unstructured communication. There may be.
- IP Internet Protocol
- IPv4 or IPv6 IP (Internet Protocol) communication
- EPS may be non-IP communication
- 5GS may be Ethernet (registered trademark) communication or Unstructured communication. There may be.
- the IP communication is data communication using IP, and is data communication realized by transmission and reception of an IP packet to which an IP header is added. It should be noted that the payload portion forming the IP packet may include user data transmitted and received by the UE_A10.
- non-IP communication is data communication without using IP, and is data communication realized by transmission and reception of data to which an IP header is not added.
- the non-IP communication may be data communication realized by transmission and reception of application data to which an IP address is not assigned, or UE_A10 by adding another header such as a Mac header or an Ethernet (registered trademark) frame header.
- User data to be transmitted and received may be transmitted and received.
- a PDU session is the connectivity established between UE_A10 and DN_A5 to provide a PDU connection service. More specifically, the PDU session may be a connectivity established between UE_A10 and the external gateway.
- the external gateway may be a UPF, a PGW (Packet Data Network Network), or the like.
- the PDU session may be a communication path established for transmitting and receiving user data between UE_A10 and the core network and / or the DN, or may be a communication path for transmitting and receiving PDUs.
- the PDU session may be a session established between the UE_A10 and the core network and / or the DN, and is configured by a logical path configured by one or more bearers or the like between devices in the mobile communication system 1. Communication channel may be used. More specifically, the PDU session may be a connection established between UE_A10 and core network_B190 and / or an external gateway, or a connection established between UE_A10 and UPF. Also, the PDU session may be the connectivity and / or connection between UE_A10 and UPF_A235 via NR node_A122. Further, a PDU session may be identified by a PDU session ID and / or an EPS bearer ID.
- UE_A10 can execute transmission and reception of user data with a device such as an application server arranged in DN_A5 using a PDU session.
- the PDU session can transfer user data transmitted and received between UE_A10 and a device such as an application server located in DN_A5.
- each device UE_A10, device in the access network, and / or device in the core network, and / or device in the data network
- the identification information includes APN (Access Point Name), TFT (Traffic Flow Template), session type, application identification information, DN_A5 identification information, NSI (Network Slice Instance) identification information, and DCN (Dedicated Core Network).
- At least one of the identification information and the access network identification information may be included, and other information may be further included. Further, when a plurality of PDU sessions are established, each piece of identification information associated with the PDU session may have the same content or different content. Further, the NSI identification information is information for identifying the NSI, and may be NSI ID or Slice Instance ID.
- UTRAN Universal Terrestrial Radio Access Network
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- NG-RAN 5G- RAN
- UTRAN_A20 and / or E-UTRAN_A80 and / or NG-RAN_A120 are referred to as 3GPP access or 3GPP access network
- wireless LAN access network and non-3GPP AN are non-3GPP access or non-3GPP access network. It may be called.
- Each radio access network includes a device (eg, a base station device or an access point) to which UE_A10 is actually connected.
- E-UTRAN_A80 is an LTE access network and includes one or more eNB_A45.
- eNB_A45 is a radio base station to which UE_A10 connects by E-UTRA (Evolved Universal Terrestrial Radio Access).
- E-UTRA Evolved Universal Terrestrial Radio Access
- each eNB may be connected to each other.
- NG-RAN_A120 is a 5G access network, which may be the (R) AN described in FIG. 4, including one or more NR nodes (New Radio Access Technology nodes) _A122 and / or ng-eNB. Be composed.
- NR @ node_A122 is a wireless base station to which UE_A10 connects with 5G wireless access (5G @ Radio @ Access), and is also referred to as gNB.
- the ng-eNB may be an eNB (E-UTRA) configuring a 5G access network, and may be connected to the core network_B190 via the NR node_A or may be directly connected to the core network_B190. May be.
- the respective NR node_A122s and / or ng-eNBs may be connected to each other.
- NG-RAN_A120 may be an access network composed of E-UTRA and / or 5G Radio Access.
- NG-RAN_A120 may include eNB_A45, NR node_A122, or both.
- eNB_A45 and NR @ node_A122 may be the same device. Therefore, NR node_A122 can be replaced with eNB_A45.
- UTRAN_A20 is an access network of the 3G mobile communication system, and includes an RNC (Radio Network Controller) _A24 and an NB (Node B) _A22.
- NB_A22 is a radio base station to which UE_A10 connects by UTRA (Universal Terrestrial Radio Access), and UTRAN_A20 may include one or more radio base stations.
- the RNC_A24 is a control unit that connects the core network_A90 and the NB_A22, and the UTRAN_A20 may include one or a plurality of RNCs. Also, the RNC_A24 may be connected to one or more NB_A22.
- UE_A10 being connected to each radio access network means being connected to a base station device, an access point, or the like included in each radio access network, and transmitting and receiving data and signals. Is also via a base station device or an access point.
- the control message transmitted and received between UE_A10 and core network_B190 may be the same control message regardless of the type of access network. Therefore, transmitting and receiving a message between the UE_A10 and the core network_B190 via the NR node_A122 may be the same as transmitting a message between the UE_A10 and the core network_B190 via the eNB_A45.
- the access network is a wireless network connected to UE_A10 and / or the core network.
- the access network may be a 3GPP access network or a non-3GPP access network.
- the 3GPP access network may be UTRAN_A20, E-UTRAN_A80, NG-RAN (Radio Access Network) _A120, and the non-3GPP access network may be a wireless LAN access point (WLAN AN).
- WLAN AN wireless LAN access point
- UE_A10 may be connected to an access network to connect to the core network, or may be connected to the core network via the access network.
- DNDN_A5 and PDN_A6 are data networks (Data @ Network) that provide communication services to UE_A10, and may be configured as a packet data service network or may be configured for each service. Further, DN_A5 may include a connected communication terminal. Therefore, connecting to DN_A5 may be connecting to a communication terminal or server device arranged in DN_A5. Further, transmitting and receiving user data to and from DN_A5 may be transmitting and receiving user data to and from a communication terminal or server device arranged in DN_A5. Although DN_A5 is outside the core network in FIG. 1, it may be inside the core network.
- the core network_A90 and / or the core network_B190 may be configured as devices in one or more core networks.
- the device in the core network may be a device that executes some or all of the processing or functions of each device included in the core network_A90 and / or the core network_B190.
- a device in the core network may be referred to as a core network device.
- the core network is an IP mobile communication network operated by a mobile communication operator (MNO; Mobile Network Operator) connected to the access network and / or the DN.
- the core network may be a core network for a mobile communication carrier that operates and manages the mobile communication system 1, or a virtual mobile communication carrier such as MVNO (Mobile Virtual Network Operator), MVNE (Mobile Virtual Network Enabler), or a virtual mobile communication carrier.
- a core network for a mobile communication service provider may be used.
- the core network_A90 may be an EPC (Evolved @ Packet @ Core) constituting an EPS (Evolved @ Packet @ System)
- the core network_B190 may be a 5GC (5G @ Core @ Network) constituting a 5GS.
- core network_B190 may be a core network of a system that provides a 5G communication service.
- the EPC may be the core network_A90 and the 5GC may be the core network_B190.
- the core network_A90 and / or the core network_B190 are not limited to this, and may be networks for providing mobile communication services.
- the core network_A90 includes HSS (Home Subscriber Server) _A50, AAA (Authentication Authorization Accounting), PCRF (Policy and Charging Rules Rules), PGW_A30, ePDG, SGW_A35, MME (Mobility Management Entity) _A40, SGSN (Serving GPRS Support) Node) and SCEF may be included. These may be configured as NF (Network Function). The NF may refer to a processing function configured in the network. Further, the core network_A90 can be connected to a plurality of radio access networks (UTRAN_A20, E-UTRAN_A80).
- HSS_A50 HSS
- PGW_A30 PGW
- SGW_A35 SGW
- MME_A40 MME
- DN_A5 and / or PDN_A6 is also called DN or PDN.
- PGW_A30 is a relay device that is connected to DN, SGW_A35, ePDG, WLAN ⁇ ANa70, PCRF, and AAA, and transfers user data as a gateway between DN (DN_A5 and / or PDN_A6) and core network_A90.
- the PGW_A30 may be a gateway for IP communication and / or non-IP communication.
- the PGW_A30 may have a function of transferring IP communication, or may have a function of converting non-IP communication and IP communication.
- a plurality of such gateways may be arranged in the core network_A90.
- a plurality of gateways may be a gateway that connects the core network_A90 and a single DN.
- the U-Plane (User @ Plane; @UP) may be a communication path for transmitting and receiving user data, or may be configured by a plurality of bearers.
- C-Plane (Control @ Plane; $ CP) may be a communication path for transmitting and receiving control messages, or may be configured with a plurality of bearers.
- PGW_A30 may be connected to SGW and DN and UPF (User plane function) and / or SMF (Session Management function), or may be connected to UE_A10 via U-Plane. Further, PGW_A30 may be configured together with UPF_A235 and / or SMF_A230.
- the SGW_A35 is connected to the PGW_A30, the MME_A40, the E-UTRAN_A80, the SGSN, and the UTRAN_A20, and relays user data as a gateway between the core network_A90 and the 3GPP access network (UTRAN_A20, GERAN, E-UTRAN_A80). Device.
- the MME_A40 is a control device that is connected to the SGW_A35, the access network, the HSS_A50, and the SCEF, and performs location information management including mobility management of the UE_A10 via the access network and access control. Further, MME_A40 may include a function as a session management device that manages a session established by UE_A10. Further, a plurality of such control devices may be arranged in the core network_A90, and for example, a location management device different from the MME_A40 may be configured. A location management device different from MME_A40 may be connected to SGW_A35, an access network, SCEF, and HSS_A50, similarly to MME_A40. Further, the MME_A40 may be connected to an AMF (Access / Mobility / Management / Function).
- AMF Access / Mobility / Management / Function
- MME_A40 is a management device that transmits and receives control information related to mobility management and session management to and from UE_A10, in other words, it may be a control device of a control plane (Control @ Plane; C-Plane; CP).
- the MME_A40 may be a management device configured in one or a plurality of core networks or DCNs or NSIs, or may include one or more core networks or It may be a management device connected to DCN or NSI.
- the plurality of DCNs or NSIs may be operated by a single communication carrier, or may be operated by different communication carriers.
- MME_A40 may be a relay device that transfers user data as a gateway between core network_A90 and the access network. Note that the user data transmitted and received by the MME_A40 acting as a gateway may be small data.
- MME_A40 may be an NF that plays a role of mobility management such as UE_A10, or may be an NF that manages one or more NSIs. MME_A40 may be an NF that plays one or more of these roles.
- the NF may be one or more devices arranged in the core network _A90, and a CP function for control information and / or a control message (hereinafter, CPF (Control Plane Function) or Control Plane Network Function). ) Or a shared CP function shared between a plurality of network slices.
- CPF Control Plane Function
- Control Plane Network Function Control Plane Network Function
- NF is a processing function configured in the network. That is, the NF may be a functional device such as an MME, an SGW, a PGW, a CPF, an AMF, an SMF, an UPF, or a function or capability capability information such as an MM (Mobility Management) or an SM (Session Management).
- the NF may be a functional device for implementing a single function or a functional device for implementing a plurality of functions.
- the NF for realizing the MM function and the NF for realizing the SM function may exist separately, or the NF for realizing both the MM function and the SM function exists. You may.
- HSS_A50 is a management node that is connected to MME_A40, AAA, and SCEF and manages subscriber information.
- the subscriber information of HSS_A50 is referred to, for example, at the time of access control of MME_A40.
- HSS_A50 may be connected to a location management device different from MME_A40.
- HSS_A50 may be connected to CPF_A140.
- HSS_A50 and the UDM (Unified Data Management) _A245 may be configured as different devices and / or NFs, or may be configured as the same device and / or NFs.
- AAA is connected to PGW30, HSS_A50, PCRF, and WLAN ANa70, and performs access control of UE_A10 connected via WLAN ANa70.
- PCRF is connected to PGW_A30, WLAN ANa75, AAA, DN_A5, and / or PDN_A6, and performs QoS management for data delivery. For example, it manages the QoS of the communication path between UE_A10 and DN_A5 and / or PDN_A6.
- the PCRF may be a device that creates and / or manages a PCC (Policy and Charging Control) rule and / or a routing rule used when each device transmits and receives user data.
- PCC Policy and Charging Control
- the PCRF may also be a PCF that creates and / or manages policies. More specifically, the PCRF may be connected to UPF_A235.
- the ePDG is connected to the PGW 30 and the WLAN ANb 75, and performs delivery of user data as a gateway between the core network_A90 and the WLAN ANb 75.
- the SGSN is connected to UTRAN_A20, GERAN, and SGW_A35, and is a control device for location management between the 3G / 2G access network (UTRAN / GERAN) and the LTE (4G) access network (E-UTRAN). It is. Further, the SGSN has a function of selecting a PGW and an SGW, a function of managing a time zone of UE_A10, and a function of selecting an MME_A40 at the time of handover to E-UTRAN.
- the SCEF is a relay device that is connected to the DN_A5 and / or PDN_A6, the MME_A40, and the HSS_A50, and that transfers user data as a gateway that connects the DN_A5 and / or PDN_A6 to the core network_A90.
- SCEF may be a gateway for non-IP communication.
- SCEF may have a function of converting between non-IP communication and IP communication.
- a plurality of such gateways may be arranged in the core network_A90.
- a plurality of gateways connecting the core network_A90 and a single DN_A5 and / or PDN_A6 and / or DN may be arranged.
- the SCEF may be configured outside the core network or may be configured inside the core network.
- AUSF Authentication Server Function
- AMF Access and Mobility Management Function
- UDSF Unstructured Data Storage Function
- NEF Network Exposure Function
- NRF Network Repository Function
- PCF Policy Control
- SMF Session Management Function
- UDM Unified Data Management
- UPF User Plane Function
- AF Application Function
- N3IWF Non-3GPP InterWorking Function
- AMF_A240 AMF
- SMF_A230 SMF
- UPF_A235 UPF
- DN_A5 DN
- FIG. 4 also shows an N1 interface (hereinafter also referred to as a reference point), an N2 interface, an N3 interface, an N4 interface, an N6 interface, an N9 interface, and an N11 interface.
- the N1 interface is an interface between the UE and the AMF
- the N2 interface is an interface between the (R) AN (access network) and the AMF
- the N3 interface is a (R) AN (access network).
- the interface between UPF, the N4 interface is the interface between SMF and UPF, the N6 interface is the interface between UPF and DN, and the N9 interface is the interface between UPF and UPF.
- N11 interface is the interface between AMF and SMF. Using these interfaces, communication can be performed between the devices.
- (R) AN is also referred to as NG RAN hereinafter.
- AMF_A240 is connected to other AMF, SMF (SMF_A230), access network (that is, UTRAN_A20, E-UTRAN_A80, and NG-RAN_A120), UDM, AUSF, and PCF.
- SMF SMF
- AMF_A240 is registration management (Registration management), connection management (Connection management), reachability management (Reachability management), mobility management (Mobility management) such as UE_A10, transfer of SM (Session Management) message between UE and SMF , Access Authentication (Access Authentication, Access Authorization), Security Anchor Function (SEA; Security Anchor Function), Security Context Management (SCM; Security Context Management), Support of N2 Interface for N3IWF, NAS Signaling with UE via N3IWF It may be responsible for transmission / reception support, authentication of UEs connected via the N3IWF, management of RM state (Registration ⁇ Management ⁇ states), management of CM state (Connection ⁇ Management ⁇ states), and the like.
- SM Session Management
- SEA Security Anchor Function
- SCM Security Context Management
- AMF_A240s may be arranged in the core network_B190.
- AMF_A240 may be an NF that manages one or more NSIs (Network ⁇ Slice ⁇ Instances).
- AMF_A240 may be a shared CP function (CCNF; Control Plane Network Function) shared by a plurality of NSIs.
- CCNF Control Plane Network Function
- the RM state includes a non-registered state (RM-DEREGISTERED @ state) and a registered state (RM-REGISTERED @ state).
- RM-DEREGISTERED since the UE is not registered in the network, the AMF cannot reach the UE because the UE context in the AMF does not have information on the location or routing that is valid for the UE. is there.
- the UE In the RM-REGISTERED state, since the UE is registered in the network, the UE can receive a service that requires registration with the network.
- CMThe CM state includes a non-connection state (CM-IDLE @ state) and a connection state (CM-CONNECTED @ state).
- CM-IDLE non-connection state
- CM-CONNECTED connection state
- the UE In the CM-IDLE state, the UE is in the RM-REGISTERED state, but does not have a NAS signaling connection established with the AMF via the N1 interface. Further, in the CM-IDLE state, the UE does not have the connection of the N2 interface (N2) connection) and the connection of the N3 interface (N3 connection).
- N2 interface N2 interface
- N3 connection connection of the N3 interface
- the NAS signaling connection NAS signaling connection
- the UE may have a connection of the N2 interface (N2) connection) and / or a connection of the N3 interface (N3 connection).
- SMF_A230 has a session management (Session Management) function such as a PDU session, an IP address allocation (IP address) for UE and its management function, a UPF selection and control function, and a traffic to an appropriate destination.
- Session Management Session Management
- Each session may have a function of providing SM information, a function of determining an SSC mode (Session ⁇ Service ⁇ Continuity ⁇ mode) for a session, a roaming function, and the like.
- the SMF_A230 may be connected to the AMF_A240, the UPF_A235, the UDM, and the PCF.
- UPUPF_A235 is also connected to DN_A5, SMF_A230, other UPFs, and access networks (that is, UTRAN_A20, E-UTRAN_A80, and NG-RAN_A120).
- UPF_A235 is an anchor for intra-RAT mobility or inter-RAT mobility, packet routing and forwarding (Packet routing & forwarding), UL CL (Uplink Classifier) function that supports routing of multiple traffic flows to one DN, Branching point function to support multi-homed PDU session (multi-homed PDU session), QoS processing for user plane, verification of uplink traffic (verification), buffering of downlink packet, downlink data notification (Downlink Data Notification) It may have a role such as a trigger function.
- Packet routing & forwarding Packet routing & forwarding
- UL CL Uplink Classifier
- branching point function to support multi-homed PDU session (multi-homed PDU session)
- QoS processing for user plane verification of uplink traffic (verification
- the UPF_A235 may be a relay device that transfers user data as a gateway between the DN_A5 and the core network_B190.
- the UPF_A235 may be a gateway for IP communication and / or non-IP communication.
- UPF_A235 may have a function of transferring IP communication, and may have a function of converting non-IP communication and IP communication.
- the plurality of gateways may be a gateway that connects the core network_B190 and a single DN.
- the UPF_A235 may have connectivity to another NF, and may be connected to each device via another NF.
- a UPF_C239 (also referred to as a branching point or an uplink classifier), which is a UPF different from the UPF_A235, may exist as a device or an NF. If UPF_C239 is present, a PDU session between UE_A10 and DN_A5 will be established via the access network, UPF_C239, UPF_A235.
- AUAUSF is connected to UDM and AMF_A240. AUSF functions as an authentication server.
- UDSF provides a function for all NFs to store and retrieve information as unstructured data.
- NEF will provide the means to securely provide services and capabilities provided by the 3GPP network.
- Information received from another NF is stored as structured data (structured data).
- the NRF Upon receiving an NF discovery request (NF ⁇ Discovery Request) from an NF instance, the NRF provides the NF with information on the discovered NF instance, and information on available NF instances and services supported by the instance. Or hold.
- NF ⁇ Discovery Request NF ⁇ Discovery Request
- PCF is connected to SMF (SMF_A230), AF, and AMF_A240. Provides policy rules and so on.
- UDM is connected to AMF_A240, SMF (SMF_A230), AUSF, and PCF.
- UDM includes UDM FE (application front end) and UDR (User Data Repository).
- the UDM-FE performs processes such as authentication information (credentials), location management (location @ management), and subscriber management (subscription @ management).
- the UDR stores the data required by the UDM ⁇ FE and the policy profiles required by the PCF.
- AF is connected to PCF. AF affects traffic routing and is involved in policy control.
- the N3IWF establishes an IPsec tunnel with the UE, relays NAS (N1) signaling between the UE and the AMF, processes N2 signaling sent from the SMF and relayed by the AMF, and establishes IPsec Security Association (IPsec SA) , Provides functions such as relaying user-plane packets between the UE and the UPF, and selecting AMF.
- IPsec SA IPsec Security Association
- the S1 mode is a UE mode in which messages can be transmitted and received using the S1 interface.
- the S1 interface may be configured by an S1-MME interface, an S1-U interface, and an X2 interface that connects the wireless base stations.
- the UE in the S1 mode can access, for example, an EPC via an eNB providing an E-UTRA function and an EPC via an en-gNB providing an NR function.
- the access to the EPC via the eNB providing the E-UTRA function and the access to the EPC via the en-gNB providing the NR function are set to the S1 mode, they may be configured as different modes respectively. .
- the N1 mode is a UE mode in which the UE can access 5GC via a 5G access network. Further, the N1 mode may be a UE mode capable of transmitting and receiving messages using the N1 interface. It should be noted that the N1 interface may be composed of the N1 interface and the Xn interface for connecting the wireless base stations.
- the UE in the N1 mode can access, for example, 5GC via an ng-eNB providing an E-UTRA function, and access to 5GC via a gNB providing an NR function.
- the access to the 5GC via the ng-eNB providing the E-UTRA function and the access to the 5GC via the gNB providing the NR function are set to the N1 mode, they may be configured as different modes respectively. .
- FIG. 5 shows an example of a device configuration of UE_A10.
- UE_A10 includes a control unit_A500, a transmission / reception unit_A520, and a storage unit_A540.
- the transmission / reception unit_A520 and the storage unit_A540 are connected to the control unit_A500 via a bus.
- an external antenna 410 is connected to the transmitting / receiving unit_A520.
- the control unit_A500 is a functional unit for controlling the entire UE_A10, and realizes various processes of the entire UE_A10 by reading and executing various information and programs stored in the storage unit_A540.
- the transmitting and receiving unit _A520 is a functional unit for UE_A10 to connect to a base station (UTRAN_A20, E-UTRAN_A80 and NG-RAN_A120) and / or a wireless LAN access point (WLAN AN) in the access network and to connect to the access network. is there.
- UE_A10 can connect to a base station and / or an access point in the access network via external antenna 410 connected to transmitting / receiving section_A520.
- UE_A10 transmits / receives user data and / or control information to / from a base station and / or an access point in an access network via an external antenna 410 connected to a transmitting / receiving unit_A520. Can be.
- the storage unit_A540 is a functional unit that stores programs, data, and the like necessary for each operation of the UE_A10, and includes, for example, a semiconductor memory, an HDD (Hard Disk Drive), an SSD (Solid State Drive), and the like.
- the storage unit_A540 stores identification information, control information, flags, parameters, rules, policies, and the like included in a control message transmitted and received in a communication procedure described later.
- the eNB_A45 and the NR node_A122 include a control unit_B600, a network connection unit_B620, a transmission / reception unit_B630, and a storage unit_B640.
- the network connection unit_B620, the transmission / reception unit_B630, and the storage unit_B640 are connected to the control unit_B600 via a bus.
- an external antenna 510 is connected to the transmitting / receiving section_B630.
- the control unit_B600 is a functional unit for controlling the entire eNB_A45 and NR node_A122, and reads out and executes various information and programs stored in the storage unit_B640, thereby controlling the entire eNB_A45 and NR node_A122. Implement various processes.
- the network connection unit_B620 is a functional unit for the eNB_A45 and the NR node_A122 to connect to the AMF_A240 and the UPF_A235 in the core network.
- the eNB_A45 and the NR node_A122 can be connected to the AMF_A240 and the UPF_A235 in the core network via the network connection unit_B620.
- the eNB_A45 and the NR node_A122 can transmit / receive user data and / or control information to / from the AMF_A240 and / or the UPF_A235 via the network connection unit_B620.
- Transmitting / receiving section_B630 is a functional section for connecting eNB_A45 and NR node_A122 to UE_A10.
- the eNB_A45 and the NR node_A122 can transmit / receive user data and / or control information to / from the UE_A10 via the transmission / reception unit_B630.
- Storage unit_B640 is a functional unit that stores a program, data, and the like necessary for each operation of eNB_A45 and NR node_A122.
- the storage unit_B640 includes, for example, a semiconductor memory, an HDD, an SSD, and the like.
- the storage unit_B640 stores identification information, control information, flags, parameters, and the like included in a control message transmitted and received in a communication procedure described later.
- the storage unit_B640 may store such information as a context for each UE_A10.
- the MME_A40 or the AMF_A240 includes a control unit_C700, a network connection unit_C720, and a storage unit_C740.
- the network connection unit_C720 and the storage unit_C740 are connected to the control unit_C700 via a bus.
- the storage unit_C740 stores a context 642.
- the control unit_C700 is a functional unit for controlling the entire MME_A40 or AMF_A240, and realizes various processes of the entire AMF_A240 by reading and executing various information and programs stored in the storage unit_C740. I do.
- Network connection unit_C720 MME_A40 or AMF_A240, other MME_A40, AMF_240, SMF_A230, base station in the access network (UTRAN_A20 and E-UTRAN_A80 and NG-RAN_A120) and / or wireless LAN access point (WLAN AN), UDM , AUSF, PCF.
- MME_A40 or AMF_A240 transmits / receives user data and / or control information to / from the base station and / or access point in the access network, UDM, AUSF, and PCF via the network connection unit_C720. Can be.
- Storage unit_C740 is a functional unit that stores programs, data, and the like necessary for each operation of MME_A40 or AMF_A240.
- the storage unit_C740 includes, for example, a semiconductor memory, an HDD, an SSD, and the like.
- the storage unit_C740 stores identification information, control information, flags, parameters, and the like included in a control message transmitted and received in a communication procedure described later.
- the context 642 stored in the storage unit_C740 may include a context stored for each UE, a context stored for each PDU session, and a context stored for each bearer.
- IMSI As contexts stored for each UE, IMSI, MSISDN, MM State, GUTI, ME Identity, UE Radio Access Capability, UE Network Capability, MS Network Capability, Access Restriction, MME F-TEID, SGW F-TEID, eNB Address , MME UE S1AP ID, eNB UE S1AP ID, NR node Address, NR node ID, WAG Address, WAG ID.
- the context stored for each PDU session may include APNAPin Use, Assigned Session Type, IP Address (es), PGW F-TEID, SCEF ID, and Default bearer.
- the context stored for each bearer includes EPS Bearer ID, TI, TFT, SGW F-TEID, PGW F-TEID, MME F-TEID, eNB Address, NR node Address, WAG Address, eNB ID, NR node ID and WAG ID.
- the SMF_A230 includes a control unit_D800, a network connection unit_D820, and a storage unit_D840.
- the network connection unit_D820 and the storage unit_D840 are connected to the control unit_D800 via a bus. Further, the storage unit_D840 stores a context 742.
- the control unit_D800 of the SMF_A230 is a functional unit for controlling the entire SMF_A230, and realizes various processes of the entire SMF_A230 by reading and executing various information and programs stored in the storage unit_D840. I do.
- the network connection unit_D820 of the SMF_A230 is a function unit for the SMF_A230 to connect to the AMF_A240, UPF_A235, UDM, and PCF.
- the SMF_A230 can transmit / receive user data and / or control information to / from the AMF_A240, UPF_A235, UDM, PCF via the network connection unit_D820.
- the storage unit_D840 of the SMF_A230 ⁇ is a functional unit that stores programs, data, and the like necessary for each operation of the SMF_A230.
- the storage unit_D840 of the SMF_A230 includes, for example, a semiconductor memory, an HDD, an SSD, and the like.
- the storage unit_D840 of the SMF_A230 stores identification information, control information, flags, parameters, and the like included in control messages transmitted and received in a communication procedure described later.
- a context stored for each UE a context stored for each APN, a context stored for each PDU session, and stored for each bearer There may be contexts.
- the context stored for each UE may include IMSI, ME Identity, MSISDN, RAT type.
- the context stored for each APN may include APN ⁇ in ⁇ use. Note that the context stored for each APN may be stored for each Data ⁇ Network ⁇ Identifier.
- the context stored for each PDU session may include Assigned Session Type, IP Address (es), SGW F-TEID, PGW F-TEID, and Default Bearer.
- the context stored for each bearer may include EPS @ Bearer @ ID, TFT, SGW @ F-TEID, and PGW @ F-TEID.
- FIG. 8 shows a device configuration example of the PGW_A30 or the UPF_A235.
- the PGW_A30 or UPF_A235 includes a control unit_D800, a network connection unit_D820, and a storage unit_D840, respectively.
- the network connection unit_D820 and the storage unit_D840 are connected to the control unit_D800 via a bus. Further, the storage unit_D840 stores a context 742.
- the control unit _D800 of the PGW_A30 or the UPF_A235 is a functional unit for controlling the entire PGW_A30 or the UPF_A235, and reads and executes various information and programs stored in the storage unit _D840 to execute the PGW_A30 or the UPF_A235. Implement the entire process.
- the network connection unit_D820 of the PGW_A30 or the UPF_A235 is such that the PGW_A30 or the UPF_A235 is connected to the DN (that is, DN_A5), the SMF_A230, another UPF_A235, and the access network (that is, UTRAN_A20, E-UTRAN_A80, and NG-RAN_A120). It is a functional part for performing.
- UPF_A235 via network connection _D820, DN (that is, DN_A5), SMF_A230, other UPF_A235, and access network (that is, UTRAN_A20 and E-UTRAN_A80 and NG-RAN_A120), User data and / or control information can be sent and received.
- DN that is, DN_A5
- SMF_A230 other UPF_A235
- access network that is, UTRAN_A20 and E-UTRAN_A80 and NG-RAN_A120
- the storage unit_D840 of the UPF_A235 is a functional unit that stores programs, data, and the like necessary for each operation of the UPF_A235.
- the storage unit_D840 of the UPF_A235 includes, for example, a semiconductor memory, an HDD, an SSD, and the like.
- the storage unit_D840 of the UPF_A235 stores identification information, control information, flags, parameters, and the like included in control messages transmitted and received in a communication procedure described later.
- the context 742 stored in the storage unit _D840 of the UPF_A235 a context stored for each UE, a context stored for each APN, a context stored for each PDU session, and stored for each bearer There may be contexts.
- the context stored for each UE may include IMSI, ME Identity, MSISDN, RAT type.
- the context stored for each APN may include APN ⁇ in ⁇ use. Note that the context stored for each APN may be stored for each Data ⁇ Network ⁇ Identifier.
- the context stored for each PDU session may include Assigned Session Type, IP Address (es), SGW F-TEID, PGW F-TEID, and Default Bearer.
- the context stored for each bearer may include EPS @ Bearer @ ID, TFT, SGW @ F-TEID, and PGW @ F-TEID.
- IMSI International Mobile Subscriber Identity
- MME_A40 / CPF_A140 / AMF_A2400, and SGW_A35 may be equal to the IMSI stored by HSS_A50.
- EMM State / MM State indicates a mobility management state of UE_A10 or MME_A40 / CPF_A140 / AMF_A240.
- EMM @ State / MM @ State may be an EMM-REGISTERED state where UE_A10 is registered in the network (registered state) and / or an EMM-DEREGISTERD state where UE_A10 is not registered in the network (unregistered state).
- the EMM @ State / MM @ State may be an ECM-CONNECTED state where the connection between the UE_A10 and the core network is maintained, and / or an ECM-IDLE state where the connection is released.
- EMM @ State / MM @ State may be information that can distinguish between a state in which UE_A10 is registered in the EPC and a state in which UE_A10 is registered in NGC or 5GC.
- GUTI Globally Unique Temporary Identity
- MME_A40 / CPF_A140 / AMF_A240 identification information GUMMEI (Globally Unique MME Identifier)
- M-TMSI M-Temporary Mobile Subscriber Identity
- ME @ Identity is the ID of UE_A10 or ME, and may be, for example, IMEI (International Mobile Equipment Identity) or IMEISV (IMEI Software Version).
- MSISDN represents the basic telephone number of UE_A10.
- MSISDN stored in MME_A40 / CPF_A140 / AMF_A240 may be information indicated by the storage unit of HSS_A50. Note that GUTI may include information for identifying CPF_140.
- ⁇ MME ⁇ F-TEID is information for identifying MME_A40 / CPF_A140 / AMF_A240.
- the MME F-TEID may include the IP address of MME_A40 / CPF_A140 / AMF_A240, or may include the TEID (Tunnel Endpoint Identifier) of MME_A40 / CPF_A140 / AMF_A240, or may include both of them. Is also good.
- the IP address of MME_A40 / CPF_A140 / AMF_A240 and the TEID of MME_A40 / CPF_A140 / AMF_A240 may be stored independently.
- the MME @ F-TEID may be identification information for user data or identification information for control information.
- ⁇ SGW ⁇ F-TEID is information for identifying SGW_A35.
- the SGW F-TEID may include the IP address of SGW_A35, may include the TEID of SGW_A35, or may include both of them. Further, the IP address of SGW_A35 and the TEID of SGW_A35 may be stored independently. Further, the SGW @ F-TEID may be identification information for user data or identification information for control information.
- ⁇ PGW ⁇ F-TEID is information for identifying PGW_A30 / UPGW_A130 / SMF_A230 / UPF_A235.
- the PGW F-TEID may include the IP address of PGW_A30 / UPGW_A130 / SMF_A230 / UPF_A235, or may include the TEID of PGW_A30 / UPGW_A130 / SMF_A230 / UPF_A235, or may include both of these. Good.
- IP address of PGW_A30 / UPGW_A130 / SMF_A230 / UPF_A235 and the TEID of PGW_A30 / UPGW_A130 / SMF_A230 / UPF_A235 may be stored independently.
- PGW @ F-TEID may be identification information for user data or identification information for control information.
- ⁇ ENB ⁇ F-TEID is information for identifying eNB_A45.
- the eNB F-TEID may include the IP address of eNB_A45, may include the TEID of eNB_A45, or may include both of them. Further, the IP address of eNB_A45 and the TEID of SGW_A35 may be stored independently. Further, eNB @ F-TEID may be identification information for user data or identification information for control information.
- APN may be identification information for identifying a core network and an external network such as a DN. Further, the APN can be used as information for selecting a gateway such as PGW_A30 / UPGW_A130 / UPF_A235 that connects the core network A_90.
- the APN may be a DNN (Data ⁇ Network ⁇ Name). Therefore, APN may be expressed as DNN, and DNN may be expressed as APN.
- the APN may be identification information for identifying such a gateway or identification information for identifying an external network such as a DN.
- identification information for identifying such a gateway or identification information for identifying an external network such as a DN.
- there may be a plurality of gateways that can be selected by the APN. Further, one gateway may be selected from among the plurality of gateways by another method using identification information other than the APN.
- ⁇ UE ⁇ Radio ⁇ Access ⁇ Capability is identification information indicating the radio access capability of UE_A10.
- UE Network Capability includes security algorithms and key derivation functions supported by UE_A10.
- MS Network Capability is information that includes one or more pieces of information necessary for SGSN_A42 for UE_A10 having a GERAN_A25 and / or UTRAN_A20 function.
- Access @ Restriction is registration information of access restriction.
- eNB @ Address is the IP address of eNB_A45.
- MME UE S1AP ID is information for identifying UE_A10 in MME_A40 / CPF_A140 / AMF_A240.
- eNB ⁇ UE ⁇ S1AP ⁇ ID is information for identifying UE_A10 in eNB_A45.
- APN in Use is the recently used APN.
- APN ⁇ in ⁇ Use may be Data ⁇ Network ⁇ Identifier. This APN may be composed of network identification information and default operator identification information. Further, APN @ in @ Use may be information for identifying the DN at which the PDU session is established.
- ⁇ Assigned ⁇ Session ⁇ Type is information indicating the type of the PDU session.
- Assigned Session Type may be Assigned PDN Type.
- the type of the PDU session may be IP or non-IP. Further, when the type of the PDU session is IP, it may further include information indicating the type of PDN allocated from the network.
- the Assigned Session Type may be IPv4, IPv6, or IPv4v6.
- IP @ Address is the IP address assigned to the UE.
- the IP address may be an IPv4 address, an IPv6 address, an IPv6 prefix, or an interface ID.
- IPv6 IPv6 prefix
- interface ID an interface ID
- the ⁇ DN ⁇ ID is identification information for identifying the core network_B190 and an external network such as a DN. Further, the DN @ ID can be used as information for selecting a gateway such as UPGW_A130 or PF_A235 that connects the core network_B190.
- the DN ID may be identification information for identifying such a gateway, or identification information for identifying an external network such as a DN.
- the DN ID may be identification information for identifying such a gateway, or identification information for identifying an external network such as a DN.
- DN ⁇ ID may be information equal to APN or information different from APN.
- each device may manage information indicating the correspondence between the DN ID and the APN, or may execute a procedure for inquiring the APN using the DN ID. Alternatively, a procedure for inquiring the DN @ ID using the APN may be performed.
- ⁇ SCEF ⁇ ID is the IP address of SCEF_A46 used in the PDU session.
- Default @ Bearer is information acquired and / or generated when a PDU session is established, and is EPS bearer identification information for identifying a default bearer (default @ bearer) associated with the PDU session.
- EPS Bearer ID is identification information of the EPS bearer.
- EPS Bearer ID may be identification information for identifying SRB (Signalling Radio Bearer) and / or CRB (Control-plane Radio bearer) or identification information for identifying DRB (Data Radio Bearer).
- TI Transaction @ Identifier
- the EPS @ Bearer @ ID may be EPS bearer identification information for identifying a dedicated bearer. Therefore, identification information for identifying an EPS bearer different from the default bearer may be used.
- TFT indicates all packet filters associated with the EPS bearer.
- the TFT is information for identifying a part of user data to be transmitted and received, and the UE_A10 transmits and receives the user data identified by the TFT using an EPS bearer associated with the TFT.
- UE_A10 transmits and receives the user data identified by the TFT using an RB (Radio Bearer) associated with the TFT.
- the TFT may be one that associates user data such as application data to be transmitted and received with an appropriate transfer path, or may be identification information for identifying application data.
- UE_A10 may transmit and receive user data that cannot be identified by TFT using a default bearer.
- UE_A10 may store in advance a TFT associated with the default bearer.
- ⁇ Default ⁇ Bearer is EPS bearer identification information for identifying the default bearer associated with the PDU session.
- the EPS bearer may be a logical communication path established between UE_A10 and PGW_A30 / UPGW_A130 / UPF_A235, or may be a communication path configuring a PDN connection / PDU session.
- the EPS bearer may be a default bearer or a dedicated bearer.
- the EPS bearer may be configured to include an RB established between UE_A10 and a base station and / or an access point in the access network. Further, the RB and the EPS bearer may be associated one-to-one.
- the identification information of the RB may be associated one-to-one with the identification information of the EPS bearer, or may be the same identification information.
- RB may be SRB and / or CRB or DRB.
- Default @ Bearer may be information that UE_A10 and / or SGW_A35 and / or PGW_A30 / UPGW_A130 / SMF_A230 / UPF_A235 acquire from the core network when a PDU session is established.
- the default bearer is an EPS bearer that is first established during a PDN connection / PDU session, and is an EPS bearer that can be established only once during one PDN connection / PDU session.
- the default bearer may be an EPS bearer that can be used for communication of user data not associated with the TFT.
- a dedicated bearer is an EPS bearer that is established after a default bearer is established in a PDN connection / PDU session, and is an EPS bearer that can be established multiple times in one PDN connection / PDU session. is there.
- the dedicated bearer is an EPS bearer that can be used for communication of user data associated with the TFT.
- ⁇ User ⁇ Identity is information for identifying a subscriber.
- User @ Identity may be IMSI or MSISDN. Further, User @ Identity may be identification information other than IMSI and MSISDN.
- Serving ⁇ Node ⁇ Information is information for identifying MME_A40 / CPF_A140 / AMF_A240 used in the PDU session, and may be the IP address of MME_A40 / CPF_A140 / AMF_A240.
- ⁇ ENB ⁇ Address is the IP address of eNB_A45.
- eNB ID is information for identifying the UE in eNB_A45.
- MME @ Address is the IP address of MME_A40 / CPF_A140 / AMF_A240.
- MME ID is information for identifying MME_A40 / CPF_A140 / AMF_A240.
- NR @ node @ Address is the IP address of NR @ node_A122.
- NR @ node @ ID is information for identifying NR @ node_A 122.
- WAG @ Address is the IP address of the WAG.
- WAG ID is information for identifying a WAG.
- Anchor or anchor point is a UFP that has a gateway function for DN and PDU sessions.
- the UPF serving as an anchor point may be a PDU session anchor, or may be an anchor.
- the SSC mode indicates a service session continuity (Session5Service Continuity) mode supported by the system and / or each device in the 5GC. More specifically, the mode may indicate the type of service session continuation supported by the PDU session established between UE_A10 and the anchor point).
- the anchor point may be the UPGW or UPF_A235.
- the SSC @ mode may be a mode indicating the type of service session continuation set for each PDU session. Further, SSC @ mode may be composed of three modes, SSC @ mode @ 1, SSC @ mode @ 2, and SSC @ mode # 3. SSC @ mode is associated with the anchor point and cannot be changed while the PDU session is established.
- SSC mode 1 in the present embodiment is a mode of service session continuation in which the same UPF is maintained as an anchor point regardless of the access technology such as RAT (Radio Access Technology) or cells used when UE_A10 connects to the network. It is. More specifically, SSC ⁇ mode ⁇ 1 may be a mode for realizing the service session continuation without changing the anchor point used by the established PDU session even when the mobility of UE_A10 occurs.
- RAT Radio Access Technology
- SSC mode 2 in the present embodiment includes an anchor point associated with one SSC mode 2 in the PDU session
- the service session continuation that releases the PDU session first, and subsequently establishes the PDU session is continued.
- SSC @ mode2 is a mode in which when an anchor point relocation occurs, a PDU session is deleted once and a new PDU session is established.
- ⁇ SSC ⁇ mode # 2 is a service session continuation mode in which the same UPF is maintained as an anchor point only in the serving area of the UPF. More specifically, SSC ⁇ mode ⁇ 2 may be a mode for realizing the service session continuation without changing the UPF used by the established PDU session as long as UE_A 10 is within the serving area of the UPF. Furthermore, SSC mode 2, such as exiting from the serving area of the UPF, when the mobility of UE_A10 occurs, changing the UPF used by the established PDU session, even in the mode to realize the service session continuation Good.
- the TUPF serving area may be an area where one UPF can provide a service session continuation function, or a subset of an access network such as a RAT or a cell used when UE_A10 connects to the network. It may be. Further, the subset of the access network may be a network composed of one or more RATs and / or cells, or may be a TA.
- SSC mode 3 in the present embodiment is a service session continuation mode in which a PDU session can be established between a new anchor point and a UE for the same DN without releasing a PDU session between the UE and the anchor point. is there.
- SSC mode 3 is a PDU session established between UE_A10 and UPF, and / or a new PDU session via a new UPF for the same DN before disconnecting the communication path, and / or Or, a service session continuation mode in which a communication path is permitted to be established.
- SSC @ mode # 3 may be a service session continuation mode in which UE_A10 is allowed to perform multihoming.
- / or SSC mode 3 may be a mode in which service session continuation using a plurality of PDU sessions and / or UPF associated with the PDU sessions is permitted.
- each device may realize service session continuation using a plurality of PDU sessions, or may realize service session continuation using a plurality of TUPFs.
- the selection of a new UPF may be performed by the network, and the new UPF may be a location where UE_A10 is connected to the network. May be the most suitable UPF. Further, when multiple PDU sessions and / or UPFs used by the PDU sessions are valid, UE_A10 immediately performs correspondence between the application and / or communication of the flow to the newly established PDU session. Or may be performed based on the completion of communication.
- the network refers to at least a part of access network_A20 / 80, access network_B80 / 120, core network_A90, core network_B190, DN_A5, and PDN_A6. Further, at least one of the access network _A20 / 80, the access network _B80 / 120, the core network _A90, the core network _B190, the DN_A5, and the PDN_A6 is referred to as a network or a network device. It may be called. In other words, the fact that the network transmits / receives messages and / or executes procedures means that devices in the network (network devices) transmit / receive messages and / or execute procedures.
- a session management (SM; Session Management) message (NAS (Non-Access-Stratum) SM message or SM message) is a procedure for SM (session management procedure or SM procedure) May be used, and may be a control message transmitted and received between UE_A10 and SMF_A230 via AMF_A240.
- the SM message includes a PDU session establishment request message, a PDU session establishment acceptance message, a PDU session completion message, a PDU session rejection message, a PDU session change request message, a PDU session change acceptance message, a PDU session change rejection message, and the like. You may.
- the procedure for the SM may include a PDU session establishment procedure, a PDU session change procedure, and the like.
- a tracking area in the present embodiment is a range managed by the core network and can be represented by the location information of UE_A10, and may be composed of, for example, one or more cells. Further, the TA may be a range in which a control message such as a paging message is broadcast, or may be a range in which the UE_A10 can move without performing a handover procedure.
- the TA list (TA ⁇ ⁇ list) is a list including one or more TAs assigned to UE_A10 by the network.
- UE_A10 may be able to move without executing the registration procedure while moving within one or more TAs included in the TA list.
- the TA list may be a group of information indicating an area where UE_A10 can move without performing the registration procedure.
- a network slice (Network @ Slice) is a logical network that provides specific network capabilities and network characteristics.
- the network slice is also referred to as an NW slice.
- NSI Network @ Slice @ Instance
- the NSI in the present embodiment is an entity of a network slice (Network @ Slice) configured in one or more in the core network_B190.
- the NSI in the present embodiment may be configured by a virtual NF (Network Function) generated using NST (Network Slice Template).
- NST Network Slice Template
- the NST is associated with a resource request for providing a required communication service or capability and is a logical expression of one or a plurality of Network Function (NF).
- NF Network Function
- the NSI may be an aggregate in the core network_B190 configured by a plurality of NFs.
- the NSI may be a logical network configured to separate user data delivered by a service or the like. At least one NF may be configured in the network slice.
- the NF configured in the network slice may or may not be a device shared with another network slice.
- UE_A10, and / or devices in the network may include NSSAI and / or S-NSSAI and / or UE usage type and / or one or more network slice type IDs and / or one or more NS IDs.
- One or more network slices can be assigned based on registration information and / or APN.
- the SS-NSSAI in the present embodiment is an abbreviation of Single Network Slice Selection Assistance information, and is information for identifying a network slice.
- the S-NSSAI may be composed of SST (Slice / Service type) and SD (Slice Differentiator).
- the S-NSSAI may include only the SST, or may include both the SST and the SD.
- the SST is information indicating the operation of the network slice expected in terms of functions and services.
- the SD may be information that complements the SST when one NSI is selected from a plurality of NSIs indicated by the SST.
- the S-NSSAI may be information unique to each PLMN (Public Land Mobile Network), standard information shared between PLMNs, or information specific to a carrier that differs for each PLMN. There may be.
- the SST and / or SD may be standard information (Standard Value) that is standardized between PLMNs, or may be information (Non Standard Value) that is different for each PLMN and is unique to a communication carrier. You may.
- the network may store one or more S-NSSAIs in the registration information of UE_A10 as a default S-NSSAI.
- NSSAI Single Network Slice Selection Assistance information
- UE_A10 may store NSSAI permitted from the network for each PLMN.
- NSSAI may be information used to select AMF_A240.
- the operator A network in the present embodiment is a network operated by the network operator A (operator A).
- the operator A may develop a common NW slice with the operator B described later.
- the operator B network in the present embodiment is a network operated by the network operator B (operator B).
- the operator B may develop a common NW slice with the operator A.
- the first NW slice in the present embodiment is an NW slice to which an established PDU session belongs when the UE connects to a specific DN.
- the first NW slice may be an NW slice managed in the operator A network, or may be an NW slice commonly managed in the operator B network.
- the second NW slice in the present embodiment is an NW slice to which another PDU session that can be connected to the DN to which the PDU session belonging to the first NW slice is connected. Note that the first NW slice and the second NW slice may be operated by the same operator or may be operated by different operators.
- Equivalent PLMN in the present embodiment refers to a PLMN that is treated to be the same PLMN as an arbitrary PLMN in a network.
- the DCN (Dedicated Core Network) in the present embodiment is a core network dedicated to a specific subscriber type and configured in the core network_A90.
- a DCN for a UE registered as a user of an M2M (Machine to Machine) communication function may be configured in the core network_A90.
- a default DCN for a UE without an appropriate DCN may be configured in the core network_A90.
- at least one or more MME_40 or SGSN_A42 may be arranged in the DCN, and at least one or more SGW_A35 or PGW_A30 or PCRF_A60 may be arranged.
- a DCN may be identified by a DCN ID, and a UE may be assigned to one DCN based on information such as a UE usage type and / or a DCN ID.
- the first timer in the present embodiment is a timer that manages the start of a procedure for session management such as a PDU session establishment procedure, and / or the transmission of an SM (Session Management) message such as a PDU session establishment request message, Information indicating the value of a back-off timer for managing the behavior of session management may be used.
- SM Session Management
- the first timer and / or the back-off timer may be referred to as a timer.
- each device may be prohibited from starting a procedure for session management and / or transmitting / receiving an SM message.
- the first timer may be set in association with at least one of the congestion management unit applied by the network and / or the congestion management unit identified by the UE.
- the SM message may be a NAS message used in a procedure for session management, and may be a control message transmitted and received between UE_A10 and SMF_A230 via AMF_A240. Further, the SM message includes a PDU session establishment request message, a PDU session establishment acceptance message, a PDU session completion message, a PDU session rejection message, a PDU session change request message, a PDU session change acceptance message, a PDU session change rejection message, and the like. You may. Further, the procedure for session management may include a PDU session establishment procedure, a PDU session change procedure, and the like. In these procedures, a back-off timer value may be included for each message received by UE_A10.
- the UE may set a back-off timer received from the NW as a first timer, may set a timer value by another method, or may set a random value. Also, when the back-off timer received from the NW is configured with a plurality, the UE may manage a plurality of "first timers" corresponding to the plurality of back-off timers, or the UE holds Based on a policy, one timer value may be selected from a plurality of back-off timer values received from the network, set as the first timer, and managed.
- the UE when receiving two back-off timer values, the UE sets the back-off timer values received from the NW to ⁇ first timer # 1 '' and ⁇ first timer # 2 '', respectively, and manages them. I do. Further, one value may be selected from a plurality of back-off timer values received from the NW based on a policy held by the UE, set as the first timer, and managed.
- UE_A10 When UE_A10 receives a plurality of backoff timer values from the NW, UE_A10 may manage a plurality of “first timers” corresponding to the plurality of backoff timers.
- the first timers may be described as, for example, “first timer # 1” or “first timer # 2”. Note that the plurality of back-off timers may be obtained by one session management procedure, or may be obtained by different session management procedures.
- the first timer is set for a plurality of related NW slices based on information for identifying one NW slice as described above, and a back-off timer for suppressing reconnection, or an APN /
- the backoff timer may be set in units of a combination of DNN and one NW slice, and may be a back-off timer for preventing reconnection, but is not limited to this, and may be used to identify APN / DNN and one NW slice.
- a backoff timer may be set based on a combination of a plurality of related NW slices based on the backoff timer to prevent reconnection.
- the re-attempt (Re-attempt) information included in the eleventh identification information in the present embodiment is obtained by reconnecting the rejected PDU session establishment request (S1100) using the same DNN information and / or S-NSSAI information. Is information that the network (NW) instructs the UE_A10 to permit.
- the UE has executed the PDU session establishment request (S1100) not including the DNN in the PDU session establishment request (1100), the fact that the DNN is not included is referred to as the same information.
- the UE has executed the PDU session establishment request (S1100) not including S-NSSAI in the PDU session establishment request (1100)
- the fact that S-NSSAI is not included is referred to as the same information.
- the re-attempt information may be set in units of UTRAN access and / or E-UTRAN access and / or NR access and / or slice information and / or equivalent PLMN and / or S1 mode and / or NW mode. Good.
- the re-attempt information specified in the access unit may be information indicating reconnection using the same information to the network on the premise of an access change.
- slice information different from the rejected slice may be specified, and reconnection using the specified slice information may be permitted.
- the re-attempt information specified in units of equivalent PLMNs may be information indicating that a reconnection using the same information is permitted when the PLMN of the change destination is the equivalent PLMN when the PLMN is changed. Further, when the PLMN of the change destination is not the equivalent PLMN, the information may indicate that reconnection using this procedure is not permitted.
- the re-attempt information specified in the mode unit indicates that, when the mode is changed, if the change destination mode is the S1 mode, reconnection using the same information is permitted. It may be information. Further, if the change destination mode is the S1 mode, it may be information indicating that reconnection using the same information is not permitted.
- the network slice association rule in the present embodiment is a rule for associating information for identifying a plurality of network slices.
- the network slice association rule may be received in a PDU session rejection message, or may be set in advance in UE_A10.
- the latest network slice association rule in UE_A10 may be applied.
- UE_A10 may perform a behavior based on the latest network slice association rule. For example, in the state where the network slice association rule is set in advance to UE_A10, when a new network slice association rule is received in the PDU session rejection message, UE_A10 updates the network slice association rule held in UE_A10. Is also good.
- the priority management rule of the backoff timer in the present embodiment is a rule set in the UE_A10 in order to manage a plurality of backoff timers generated in a plurality of PDU sessions collectively as one backoff timer.
- UE_A10 is based on a priority management rule of the back-off timer, a plurality of back-off timers May be managed collectively.
- the pattern in which conflict or overlapping congestion management occurs is a case where congestion management based on only DNN and congestion management based on both DNN and slice information are applied simultaneously.In this case, congestion based on only DNN Management takes precedence.
- the priority management rule of the back-off timer is not limited to this.
- the back-off timer may be the first timer included in the PDU session reject message.
- the first state in the present embodiment is a state in which each device has completed a registration procedure and a PDU session establishment procedure, and UE_A10 and / or each device has one or more of the first to fourth congestion management applied. It is in a state where it is.
- UE_A10 and / or each device may be in a state where UE_A10 is registered in the network (RM-REGISTERED state) due to the completion of the registration procedure, and the completion of the PDU session establishment procedure is performed when UE_A10 is It may be in a state where the session establishment rejection message has been received.
- the congestion management in the present embodiment includes one or a plurality of congestion managements of the first to fourth congestion managements. Note that the control of the UE by the NW is realized by the first timer and the congestion management recognized by the UE, and the UE may store an association between these pieces of information.
- the first congestion management in the present embodiment refers to control signal congestion management for DNN parameters.
- the NW when congestion for DNN #A is detected, if the NW recognizes that it is a UE-led session management request targeting only DNN #A parameters, the NW is the first May be applied.
- the NW may select a default DNN on the initiative of the NW and set it as a congestion management target even when the DNN information is not included in the session management request led by the UE.
- the NW may apply the first congestion management.
- the UE may suppress the UE-initiated session management request targeting only DNN # A.
- the first congestion management in the present embodiment is control signal congestion management for the DNN, and may be congestion management due to the fact that the connectivity to the DNN is in a congested state.
- the first congestion management may be congestion management for restricting connection to DNN # A in all connectivity.
- the connection to DNN # A in all the connectivity may be a connection of DNN # A in the connectivity using any S-NSSAI available to the UE, and a network slice to which the UE can connect. May be a connection of DNN # A.
- connectivity to DNN # A without a network slice may be included.
- the second congestion management in the present embodiment refers to control signal congestion management for S-NSSI parameters.
- NW when control signal congestion for S-NSSAI # A is detected, when the NW recognizes that it is a UE-led session management request targeting only S-NSSAI # A parameters , NW may apply the second congestion management.
- the UE When the second congestion management is applied, the UE may suppress the UE-initiated session management request for only S-NSSAI # A.
- the second congestion management in the present embodiment is control signal congestion management for S-NSSAI, and congestion management due to the network slice selected by S-NSSAI being in a congestion state. May be.
- the second congestion management may be congestion management for regulating all connections based on S-NSSAI # A. That is, congestion management for restricting connections to all DNNs via the network slice selected by S-NSSAI # A may be used.
- the third congestion management in the present embodiment refers to control signal congestion management for DNN and S-NSSAI parameters.
- the NW when the control signal congestion for DNN # A and the control signal congestion for S-NSSAI # A are simultaneously detected, the NW sets the parameters of DNN # A and S-NSSAI # A.
- the NW may apply the third congestion management. Note that the NW may select the default DNN under the initiative of the NW even when the session management request led by the UE does not include the information indicating the DNN, and may also set the default DNN as a congestion management target.
- the UE may suppress the UE-initiated session management request for the parameters of DNN # A and S-NSSAI # A.
- the third congestion management in the present embodiment is a control signal congestion management targeting the parameters of the DNN and the S-NSSAI, and to the DNN via the network slice selected based on the S-NSSAI. It may be congestion management due to the connectivity being in a congestion state. For example, the third congestion management may be congestion management for restricting connection to DNN # A among the connectivity based on S-NSSAI # A.
- the fourth congestion management in the present embodiment indicates control signal congestion management for at least one parameter of DNN and / or S-NSSAI.
- the NW when the control signal congestion for the DNN # A and the control signal congestion for the S-NSSAI # A are detected at the same time, the NW has the DNN # A and / or the S-NSSAI # A.
- the NW may apply the fourth congestion management.
- the NW may select the default DNN under the initiative of the NW even when the session management request led by the UE does not include the information indicating the DNN, and may also set the default DNN as a congestion management target.
- the UE may suppress a UE-initiated session management request for at least one parameter of DNN # A and / or S-NSSAI # A.
- the fourth congestion management in the present embodiment is a control signal congestion management targeting the parameters of the DNN and the S-NSSAI, a network slice selected based on the S-NSSAI, and a connection to the DNN. It may be congestion management due to the congestion state.
- the fourth congestion management is congestion management for regulating all connections based on S-NSSAI # A, and congestion for regulating connections to DNN # A in all connectivity. It may be management.
- it is congestion management for regulating connections to all DNNs via the network slice selected by S-NSSAI # A, and for regulating connections to DNN # A for all connectivity. It may be congestion management.
- connection to DNN # A in all the connectivity may be a connection of DNN # A in the connectivity using any S-NSSAI available to the UE, and a network slice to which the UE can connect. May be a connection of DNN # A.
- connectivity to DNN # A without a network slice may be included.
- the fourth congestion management using DNN # A and S-NSSAI # A as parameters, the first congestion management using DNN # A as a parameter and the second congestion management using S-NSSAI # A as a parameter May be executed simultaneously.
- the first behavior in the present embodiment is a behavior in which the UE stores the slice information transmitted in the first PDU session establishment request message in association with the transmitted PDU session identification information.
- the UE may store the slice information transmitted in the first PDU session establishment request message, or store the slice information received when the first PDU session establishment request is rejected. You may.
- the second behavior in the present embodiment the UE, using different slice information different from the slice information specified in the first PDU session establishment, to the same APN / DNN as the first PDU session establishment request
- the second behavior the UE, if the backoff timer value received from the network is zero or invalid, using slice information different from the slice information specified in the first PDU session establishment,
- the behavior may be such that a PDU session establishment request for connecting to the same APN / DNN as the first PDU session establishment request is transmitted.
- the UE connects to the same APN / DNN as the APN / DNN included in the first PDU session establishment request, using slice information different from the slice information specified in the first PDU session establishment. For transmitting a PDU session establishment request for the purpose.
- the third behavior in the present embodiment is that the UE transmits a new PDU session establishment request using the same identification information until the first timer expires, when the PDU session establishment request is rejected.
- Behavior Specifically, the third behavior is that if the UE receives a back-off timer value from the network that is neither zero nor invalid, a new PDU with the same identification information until the first timer expires.
- the behavior that does not transmit the session establishment request may be used.
- the same identification information means that the first identification information and / or the second identification information to be included in the new PDU session establishment request is the first identification information and / or the second identification information transmitted in the rejected PDU session establishment request. Alternatively, it may mean that the second identification information is the same.
- a behavior may be such that a new PDU session establishment request using the same identification information is not transmitted until the first timer expires.
- the PDU session that does not transmit a new PDU session establishment request in the third behavior may be a PDU session to which congestion management associated with the first timer is applied.
- the first timer is a connectivity corresponding to the type of congestion management associated with, and DNN and / or S-NSSAI associated with the congestion management May be a behavior in which a new PDU session establishment request is not transmitted for a PDU session using
- the process in which the UE is prohibited by this behavior may be the start of a procedure for session management including a PDU session establishment request, and / or the transmission and reception of an SM message.
- the fourth behavior in the present embodiment the UE, when the PDU session establishment request is rejected, until the first timer expires, slice information, a new PDU session establishment request that does not carry DNN / APN information Is not transmitted.
- the fourth behavior is that if the UE received the backoff timer from the network is neither zero nor invalid, until the first timer expires, slice information, a new PDU that does not carry DNN / APN information
- the behavior that does not transmit the session establishment request may be used.
- the fifth behavior in the present embodiment is a behavior in which the UE does not transmit a new PDU session establishment request using the same identification information when the PDU session establishment request is rejected.
- the fifth behavior is that when the UE and the UE and the network support different PDP ⁇ ⁇ ⁇ types and are in the same PLMN, a new PDU session using the same identification information
- the behavior that does not transmit the establishment request may be used.
- the sixth behavior in the present embodiment is a behavior in which the UE transmits a new PDU session establishment request as an initial procedure using the same identification information when the PDU session establishment request is rejected.
- the sixth behavior the UE, the first PDU session establishment request, because there is no PDN session context of interest in handover from non-3GPP access, when rejected, the same identification information As an initial procedure, a new PDU session establishment request may be transmitted.
- the seventh behavior in the present embodiment is that, when the UE selects another NW slice in the procedure for selecting the PLMN, the UE continues the back-off timer received when the previous PDU session establishment request was rejected.
- Behavior Specifically, the seventh behavior, UE, when the first PDU session establishment request is rejected, in the case of performing PLMN selection, specified in the first PDU session establishment request in the selected PLMN If a common NW slice can be designated as the NW slice, the behavior may be such that the back-off timer received when the first PDU session establishment request is rejected is continued.
- the eighth behavior in the present embodiment is a behavior in which the UE sets a value notified from the network or a value previously set in the UE as the first timer value.
- the eighth behavior may be a behavior in which the UE sets the back-off timer value received in the rejection notification of the first PDU session establishment request as the first timer value, or in advance.
- the behavior may be set to the UE or set to a held value as the first timer value. Note that when the timer is set in the UE in advance or the retained timer is set as the first timer value, the timer may be limited to the time when the HPLMN or the equivalent PLMN is present.
- the ninth behavior in the present embodiment the UE, when the PDU session establishment request is rejected, the terminal power on / off, or until the removal of the USIM (Universal Subscriber Identity Module), a new PDU session establishment request This is a behavior that does not send. Specifically, the ninth behavior, the UE, when the back-off timer received from the network is invalid, or the first PDU session rejection reason between the UE and the network PDP type (PDP type) If they are different, a new PDU session establishment request is not transmitted until the terminal power is turned on / off or the USIM is unplugged.
- PDP type network PDP type
- the connected PLMN does not transmit a new PDU session establishment request until the terminal power is turned on / off or the USIM is disconnected. You may.
- the specified APN / DNN is not supported by the connected PLMN radio and the first PDU session is rejected, there is no information element of the back-off timer from the network, and the Re-attempt information is If there is no PLMN, or if reconnection of the PDU session to the equivalent PLMN is not allowed, the connected PLMN does not transmit a new PDU session establishment request until the terminal power is turned on / off or the USIM is unplugged. You may. If the first PDU session is rejected because the specified APN / DNN is not supported by the radio of the connected PLMN and if the back-off timer from the network is neither zero nor invalid, the terminal powers on.
- the behavior may be such that a new PDU session establishment request is not transmitted until / OFF or until the USIM is inserted and removed. Also, if the specified APN / DNN is rejected for the first PDU session because it is not supported by the connected PLMN radio, if the back-off timer from the network is invalid, the terminal power on / off, Alternatively, the behavior may be such that a new PDU session establishment request is not transmitted until the USIM is removed.
- the 10A tenth behavior in the present embodiment is a behavior in which the UE transmits a new PDU session establishment request when the PDU session establishment request is rejected.
- the tenth behavior is that the UE further notifies the network when the back-off timer received from the network is zero, or when the first PDU session establishment request is rejected for a temporary reason. If there is no back-off timer information element itself, the behavior may be to transmit a new PDU session establishment request. Also, if another PLMN is selected, or if another NW slice is selected, and the first PDU session establishment request is rejected for a temporary reason, the target APN / DNN is selected by the selected PLMN.
- a behavior of transmitting a new PDU session establishment request may be adopted.
- the PLMN that does not receive the Re-attempt information, or that is not in the equivalent PLMN list Is selected, or when the PDP @ type is changed, or when the terminal power is turned on / off, or when the USIM is inserted / removed a new PDU session establishment request may be transmitted. If the first PDU session is rejected because the specified APN / DNN is not supported by the connected PLMN radio and the backoff timer notified from the network is zero, a new PDU session It may be a behavior of transmitting an establishment request.
- the eleventh behavior in the present embodiment is a behavior in which the UE ignores the first timer and the Re-attempt information.
- the eleventh behavior is that if the UE is rejected because the first PDU session establishment request is in the handover from non-3GPP access because the target PDN session context does not exist, or Because the number of bearers set in PDN connection has reached the maximum allowed number, if the first PDU session establishment is rejected, the first timer, and the behavior of ignoring the Re-attempt information, Is also good.
- the twelfth behavior in the present embodiment the UE, based on information for identifying one NW slice received in the rejection notification for the first PDU session establishment request, based on a plurality of NW slices related This is a behavior in which information for identification is determined, and reconnection to a plurality of related NW slices is suppressed based on the information for identifying one NW slice.
- the twelfth behavior is that the UE identifies another NW slice related to the information for identifying the NW slice notified by the first PDU session establishment request rejection based on the network slice association rule.
- a behavior that derives information for performing the operation may be used.
- the network slice association rule may be set in the UE in advance, or may be notified from the network in a PDU session establishment rejection notification.
- the thirteenth behavior in the present embodiment is different from one or more PDU session establishment by the same UE a plurality of different congestion management is activated, when a plurality of timers are provided from the network, the UE is a back-off timer
- the behavior may be such that the timer is managed based on the priority management rule.
- the first PDU session establishment request of the combination of DNN_1 and slice_1 by the UE is set as a congestion management target based on both the DNN and the slice information, and the UE receives the first timer # 1.
- the UE makes a second PDU session establishment request for the combination of DNN_1 and slice_2, is subjected to congestion management based only on the DNN, and receives the first timer # 2.
- the UE may manage the UE's PDU session re-establishment behavior by using the first timer # 2 that has been made superior. Specifically, the timer value held by the UE may be overwritten by the timer value generated by the prioritized congestion control.
- the fourteenth behavior in the present embodiment means that, when one or a plurality of PDU sessions are established by the same UE, different congestion managements are applied, and when a plurality of timers are provided from the network, each session management instance (PDU session The behavior may be to manage the timer in (unit). For example, if the first PDU session establishment of the combination of DNN # 1 and slice # 1 by the UE is targeted for congestion based on both the DNN and the slice information, the UE sets the target back-off timer value to the first. Is managed as timer # 1.
- the UE is Is managed as the first timer # 2.
- the UE simultaneously manages a plurality of timers (here, first timer # 1 and first timer # 2). Specifically, the UE manages the timer on a session management instance / PDU session basis. If the UE receives a plurality of timers simultaneously in one session management procedure, the UE simultaneously manages the target back-off timer in the congestion management unit identified by the UE.
- the behavior may be such that a second identification process for identifying the DNN and / or the S-NSSAI associated with the congestion management is performed.
- the first identification processing includes at least one or more pieces of identification information from the first identification information to the fourth identification information, and / or at least one or more pieces of the eighteenth identification information from the eleventh identification information The identification may be performed based on the identification information.
- the second identification processing includes at least one or more pieces of identification information from the first identification information to the fourth piece of identification information, and / or at least one or more pieces of the eighteenth identification information from the eleventh piece of identification information. May be identified based on the identification information.
- the type of congestion management applied when satisfying any one or a combination of two or more of the following cases may be identified as the first congestion management.
- the fifteenth identification information is a value corresponding to the first congestion management.
- At least the sixteenth identification information is a value corresponding to the first congestion management.
- at least the fourteenth identification information includes information indicating the first congestion management.
- At least the seventeenth identification information includes only DNN and does not include S-NSSAI.
- the sixteenth identification information is information for identifying any one of the first congestion management and the second congestion management, and the second congestion management for the sixteenth identification information In a case where only the value corresponding to is settable, at least the 16th identification information is not received.
- the sixteenth identification information is information for identifying any one of the first congestion management and the fourth congestion management, and the fourth congestion management for the sixteenth identification information In a case where only the value corresponding to is settable, at least the 16th identification information is not received.
- the 16th identification information is information for identifying any one of the first congestion management, the second congestion management, and the fourth congestion management, and the 16th identification information When only the value corresponding to the second congestion management and the value corresponding to the fourth congestion management are settable, at least the sixteenth identification information is not received.
- UE_A10 is at least one or more pieces of identification information from the first identification information to the fourth identification information, and / or at least one of the eighteenth to eighteenth identification information from the eleventh identification information. May be identified based on one piece of identification information or a combination of two or more pieces of identification information.
- the type of congestion management applied when satisfying any one or a combination of two or more of the following cases may be identified as the second congestion management.
- the fifteenth identification information is a value corresponding to the second congestion management.
- At least the sixteenth identification information is a value corresponding to the second congestion management.
- at least the fourteenth identification information includes information indicating the second congestion management.
- the sixteenth identification information is information for identifying any one of the first congestion management and the second congestion management, and the first congestion management for the sixteenth identification information And when at least the sixteenth identification information has not been received when the information can be set only for the value corresponding to.
- the sixteenth identification information is information for identifying any one of the second congestion management and the third congestion management, and the third congestion management for the sixteenth identification information And when at least the sixteenth identification information has not been received when the information can be set only for the value corresponding to.
- the sixteenth identification information is information for identifying any one of the second congestion management, the third congestion management, and the fourth congestion management, and for the sixteenth identification information When only the value corresponding to the third congestion management and the value corresponding to the fourth congestion management are settable, at least the sixteenth identification information is not received.
- UE_A10 is at least one or more pieces of identification information from the first identification information to the fourth identification information, and / or at least one of the eighteenth to eighteenth identification information from the eleventh identification information. May be identified based on one piece of identification information or a combination of two or more pieces of identification information.
- the type of congestion management applied when satisfying any one or a combination of two or more of the following cases may be identified as the third congestion management.
- At least the fifteenth identification information is a value corresponding to the third congestion management.
- the fifteenth identification information includes the third congestion management, and does not include the fourth congestion management is a value corresponding to a plurality of congestion management
- the seventeenth identification information includes S-NSSAI and DNN If included.
- the sixteenth identification information is information for identifying any one of the third congestion management and the fourth congestion management, and the fourth congestion management for the sixteenth identification information And when at least the sixteenth identification information has not been received when the information can be set only for the value corresponding to.
- the sixteenth identification information is information for identifying any one of the second congestion management and the third congestion management, and the second congestion management for the sixteenth identification information And when at least the sixteenth identification information has not been received when the information can be set only for the value corresponding to.
- the sixteenth identification information is information for identifying any one of the second congestion management, the third congestion management, and the fourth congestion management, and for the sixteenth identification information When only the value corresponding to the second congestion management and the value corresponding to the fourth congestion management are settable, at least the sixteenth identification information is not received.
- UE_A10 is at least one or more pieces of identification information from the first identification information to the fourth identification information, and / or at least one of the eighteenth to eighteenth identification information from the eleventh identification information. May be identified based on one piece of identification information or a combination of two or more pieces of identification information.
- the type of congestion management applied when satisfying any one or a combination of two or more of the following cases may be identified as the fourth congestion management.
- the fifteenth identification information is a value corresponding to the fourth congestion management.
- the sixteenth identification information is a value corresponding to the fourth congestion management.
- at least the fourteenth identification information includes information indicating the fourth congestion management.
- the fifteenth identification information includes the fourth congestion management, and does not include the third congestion management, is a value corresponding to a plurality of congestion management, and the seventeenth identification information includes S-NSSAI and DNN If included.
- the sixteenth identification information is information for identifying any one of the third congestion management and the fourth congestion management, and the third congestion management for the sixteenth identification information And when at least the sixteenth identification information has not been received when the information can be set only for the value corresponding to.
- the sixteenth identification information is information for identifying any one of the second congestion management and the fourth congestion management, and the second congestion management for the sixteenth identification information And when at least the sixteenth identification information has not been received when the information can be set only for the value corresponding to.
- the sixteenth identification information is information for identifying any one of the first congestion management and the fourth congestion management, and the first congestion management for the sixteenth identification information And when at least the sixteenth identification information has not been received when the information can be set only for the value corresponding to.
- the sixteenth identification information is information for identifying any one of the second congestion management, the third congestion management, and the fourth congestion management, and for the sixteenth identification information When only the value corresponding to the second congestion management and the value corresponding to the third congestion management are settable, at least the sixteenth identification information is not received.
- the 16th identification information is information for identifying any one of the first congestion management, the second congestion management, and the fourth congestion management, and the 16th identification information When only the value corresponding to the first congestion management and the value corresponding to the second congestion management are settable, at least the sixteenth identification information is not received.
- UE_A10 is at least one or more pieces of identification information from the first identification information to the fourth identification information, and / or at least one of the eighteenth to eighteenth identification information from the eleventh identification information.
- the identification may be performed based on one piece of identification information or a combination of two or more pieces of identification information, or may be performed using other means.
- the type of congestion management may be identified by the first identification processing.
- the second identification process may be a process of identifying a corresponding DNN and / or S-NSSAI for the type of congestion management identified by the first identification process.
- the DNN corresponding to the first congestion management, the third congestion management, and the fourth congestion management may be determined based on the twelfth identification information. And / or the DNN corresponding to the first congestion management, the third congestion management, and the fourth congestion management may be determined based on the seventeenth identification information. And / or the DNN corresponding to the first congestion management, the third congestion management, and the fourth congestion management may be determined based on the second identification information.
- the DNN corresponding to the first congestion management, the third congestion management, and the fourth congestion management may be the DNN indicated by the twelfth identification information.
- the DNN corresponding to the first congestion management, the third congestion management, and the fourth congestion management may be a DNN included in the seventeenth identification information.
- the DNN corresponding to the first congestion management, the third congestion management, and the fourth congestion management may be a DNN indicated by the second identification information.
- the S-NSSAI corresponding to the second congestion management, the third congestion management, and the fourth congestion management may be determined based on the seventeenth identification information. And / or the DNN corresponding to the first congestion management, the third congestion management, and the fourth congestion management may be determined based on the first identification information.
- the DNN corresponding to the first congestion management, the third congestion management, and the fourth congestion management may be S-NSSAI indicated by the seventeenth identification information. And / or the DNN corresponding to the first congestion management, the third congestion management, and the fourth congestion management may be S-NSSAI included in the first identification information.
- UE_A10 is at least one or more pieces of identification information from the first identification information to the fourth identification information, and / or at least one of the eighteenth to eighteenth identification information from the eleventh identification information.
- the identification may be performed based on one piece of identification information or a combination of two or more pieces of identification information, or may be performed using other means.
- UE_A10 may identify the congestion management applied to UE_A10 by core network_B190. In other words, UE_A10 may identify the corresponding congestion management type and the corresponding S-NSSAI and / or DNN as the applied congestion management based on the fifteenth behavior.
- UE_A10, the first identification information to the fourth identification information, from the eleventh identification information to the eighteenth identification information, one or more identification information, stored in association with the congestion management to be applied May be managed.
- the third identification information and / or the fourth identification information and / or the thirteenth identification information may be stored and managed as information for identifying the congestion management to be applied.
- the sixteenth behavior in the present embodiment is a behavior in which the first timer is stopped when the NW-led session management procedure is executed in a state where the UE has activated the first timer.
- the first timer to be stopped is determined based on the twenty-first identification information among the activated first timers, and the stop is determined. Behavior. And / or the behavior of stopping the first timer associated with the congestion management identified by the seventeenth behavior. When there are a plurality of congestion managements identified by the seventeenth behavior, the timers associated with the respective congestion managements may be stopped.
- the seventeenth behavior in the present embodiment is based on the reception of a control message transmitted by the core network, and among the one or more congestion managements applied by the UE, of the UE that identifies the congestion management to stop applying. May be behavior.
- the UE may identify the congestion management that stops or changes the application based on the 21st identification information.
- the UE stores the third identification information in the fourth processing, and / or the fourth identification information, and / or the thirteenth identification information as information for identifying congestion management.
- the congestion management in which the identification information matches the thirteenth identification information included in the twenty-first identification information may be identified as the congestion management for stopping the application.
- the UE may identify the congestion management to stop the application .
- details of the identification method may be the same as the identification processing in the fifteenth behavior described in the fourth processing in the PDU session establishment procedure example described later. That is, the UE may identify the congestion management to be stopped in a manner similar to the method for identifying the congestion management to be applied.
- the UE may identify a plurality of congestion managements to stop the application.
- a method for identifying a second congestion management different from the first congestion management will be described assuming that the congestion management identified by the above-described method is a first congestion management.
- the UE may identify the congestion management associated with the same DNN as the first congestion management as the second congestion management. And / or the UE may identify the congestion management associated with the same S-NSSAI as the first congestion management as the second congestion management. Note that the identification of a plurality of congestion managements whose application is to be stopped may be set to be executed only when the first congestion management and / or the second congestion management is a specific type of congestion management.
- the UE may identify the second congestion management. And / or, in identifying the second congestion management, in the case where the search target congestion management is one of the first congestion management to the fourth congestion management, the UE identifies the second congestion management Is also good.
- the type in which the first congestion management and / or the second identification information can identify a plurality of congestion managements may be set in the core network and / or the UE in advance. It should be noted that the specific type of congestion management for which identification is permitted does not need to be specified as one, and a plurality of types may be set.
- the first identification information in the present embodiment is information for identifying that it belongs to the first NW slice.
- the first identification information may be information indicating that the UE desires to establish a PDU session belonging to the first NW slice.
- the first identification information may be information for identifying a first NW slice.
- the slice information may be identification information indicating a specific S-NSSAI.
- the first identification information may be information for identifying a specific NW slice in the operator A network, or may identify the same NW slice in the operator B (other operators other than the operator A) in common. Information may be used.
- the first identification information may be information for identifying a first NW slice set from HPLMN, or for identifying a first NW slice acquired from AMF in a registration procedure. It may be information or information for identifying the first NW slice permitted from the network. Further, the first identification information may be information for identifying the first NW slice stored for each PLMN.
- the second identification information in the present embodiment is DNN (Data @ Network @ Name), which may be information used to identify DN (Data @ Network).
- the third identification information in the present embodiment is a PDU session ID (PDU @ Session @ ID), and may be information used to identify the PDU session (PDU @ Session).
- the fourth identification information in the present embodiment is PTI (Procedure transaction identity), which is information for identifying transmission / reception of a series of messages of a specific session management procedure as one group, and further, other series of sessions. It may be information used to identify and / or distinguish between transmission and reception of a management-related message.
- PTI Provide transaction identity
- the eleventh identification information in the present embodiment may be information indicating that a request for establishing a PDU session or a request for changing a PDU session (PDU session modification) is rejected.
- the PDU session establishment request or the PDU session change request is a request made by the UE, and includes a DNN and / or S-NSSAI. That is, the eleventh identification information may be information indicating that the NW rejects the establishment request or the change request for the PDU session corresponding to the DNN and / or the S-NSSA.
- the eleventh identification information may be information indicating re-attempt (Re-attempt) information.
- the NW may indicate congestion management to the UE by transmitting at least one of the twelfth identification information to the eighteenth identification information together with the eleventh identification information to the UE.
- the NW may notify the UE of congestion management corresponding to one or a combination of a plurality of pieces of identification information from the twelfth identification information to the eighteenth identification information.
- the UE may identify a congestion management corresponding to one or a combination of a plurality of identification information of the eighteenth identification information from the twelfth identification information, and may execute a process based on the identified congestion management.
- the UE may start counting the first timer associated with the identified congestion management.
- the timer value of the first timer may be determined using the fourteenth identification information, or by setting a timer value set in another method such as using a value stored in advance by the UE. Alternatively, a random value may be set.
- the twelfth identification information in the present embodiment is a DNN, which may be a DNN not permitted by the network, or information indicating that the DNN identified by the second identification information is not permitted. There may be. Further, the twelfth identification information may be the same DNN as the second identification information.
- the thirteenth identification information in the present embodiment is PDU Session ID and / or PTI, and may be a PDU session ID and / or PTI not permitted by the network, or may be identified by the third identification information. PDU session ID and / or information indicating that the PTI is not permitted. Further, the PDU ⁇ Session ⁇ ID of the thirteenth identification information may be the same PDU session ID as the third identification information. Further, the PTI of the thirteenth identification information may be the same PTI as the fourth identification information.
- the thirteenth identification information may be used as information for identifying the congestion management that the NW notifies the UE based on the rejection of the PDU session establishment.
- the UE may store and manage the thirteenth identification information in association with the congestion management executed based on the fifteenth behavior, and use the stored thirteenth identification information as information for identifying the executed congestion management.
- the information for identifying the congestion management may be configured by a combination of the thirteenth identification information and one or more identification information of the fourteenth to eighteenth identification information.
- the fourteenth identification information in the present embodiment may be information indicating a value of a back-off timer.
- the backoff timer may be a value indicating the validity period of the congestion management that the NW notifies the UE based on the rejection of the PDU session establishment.
- the UE may use the fourteenth identification information as the timer value in the fifteenth behavior performed in response to the reception of the fourteenth identification information.
- the fourteenth identification information may include information for identifying the type of congestion management in addition to the timer value. Specifically, it may include information for identifying which of the first to fourth congestion managements is the congestion management.
- the information for identifying the congestion management type may be a timer name for identifying each congestion management, or a flag for identifying each congestion management.
- the present invention is not limited to this, and may be identified by another method such as identification by a position stored in the control message.
- the fifteenth identification information in the present embodiment is information indicating one or more reason values (Cause Value) indicating the reason why the procedure was rejected.
- the reason value may be information indicating the congestion management applied by the NW to the present procedure, or information indicating the reason value for rejecting the present procedure applied by the NW other than the congestion management. Good.
- the reason value is information for identifying which congestion management in the fourth congestion management indicates the congestion management that the NW notifies the UE based on the rejection of the PDU session establishment. It may be.
- the NW may transmit a different value to the UE as the reason value according to each of the first to fourth congestion managements.
- the UE grasps in advance the meaning of each value transmitted as the reason value, and in the fifteenth behavior, based on at least the fifteenth identification information, any one of the first congestion management to the fourth congestion management. You may identify whether it is congestion management.
- the reason value is the congestion management that the NW notifies the UE based on the rejection of the PDU session establishment, the first congestion management, or the second congestion management and the third congestion management and the fourth congestion management May be information for identifying whether any of the above is the congestion management.
- the NW differs from the UE.
- the value may be transmitted as the reason value.
- the UE grasps the meaning of each value transmitted as the reason value in advance, and in the fifteenth behavior, based on at least the fifteenth identification information, is the first congestion management, or the second congestion management. You may identify whether it is the third congestion management and the fourth congestion management.
- the reason value is the congestion management that the NW notifies the UE based on the rejection of the PDU session establishment, the first congestion management, the second congestion management, the third congestion management and the third congestion management It may be information for identifying whether any of the congestion managements in 4 is congestion management.
- the NW May send a different value to the UE as the reason value.
- the UE grasps in advance the meaning of each value transmitted as the reason value, and in the fifteenth behavior, based on at least the fifteenth identification information, is the first congestion management or the second congestion management. It is also possible to identify whether or not there is any one of the third congestion management and the fourth congestion management.
- the reason value is whether the NW notifies the UE based on the rejection of the PDU session establishment, whether the first congestion management or the second congestion management, the third congestion management or the fourth congestion management It may be information for identifying management or not.
- the first congestion management or the case of the second congestion management and depending on the case of the third congestion management or the fourth congestion management, the NW transmits a different value to the UE as the reason value Is also good.
- UE grasps the meaning of each value transmitted as the reason value in advance, and in the fifteenth behavior, based on at least the fifteenth identification information, whether it is the first congestion management or the second congestion management, Whether it is the third congestion management or the fourth congestion management may be identified.
- the reason value is whether the NW notifies the UE based on the rejection of the PDU session establishment
- the congestion management is the second congestion management or the third congestion management, the first congestion management or the fourth congestion management It may be information for identifying management or not.
- the NW transmits a different value to the UE as the reason value Is also good.
- UE grasps the meaning of each value transmitted as the reason value in advance, and in the fifteenth behavior, based on at least the fifteenth identification information, whether it is the second congestion management or the third congestion management, Whether it is the first congestion management or the fourth congestion management may be identified.
- the reason value is whether the NW notifies the UE based on the rejection of the PDU session establishment, whether the second congestion management or the fourth congestion management, the first congestion management or the third congestion management It may be information for identifying management or not. In this case, if it is the second congestion management or the fourth congestion management, depending on whether the first congestion management or the third congestion management, the NW transmits a different value to the UE as the reason value Is also good.
- UE grasps the meaning of each value transmitted as the reason value in advance, and in the fifteenth behavior, based on at least the fifteenth identification information, whether it is the second congestion management or the fourth congestion management, Whether it is the first congestion management or the third congestion management may be identified.
- the reason value may be information indicating that the NW performs congestion management on the UE based on the rejection of the PDU session establishment.
- the reason value may be information for causing the UE to execute any of the first to fourth congestion managements.
- the reason value does not have to be information that can identify the specific congestion management.
- the external DN is one in which this procedure does not include DNN information or is unknown DNN.
- the reason may be a reason value (Missing ⁇ or ⁇ unknown ⁇ DNN) that the NW indicating that this procedure was rejected notifies the UE.
- the external DN is a reason value (Unknown PDU session type) that the NW indicating to the UE indicating that the PDU session type of the procedure is not identifiable or rejected because the procedure is not permitted is notified. Good.
- the value may be a reason value (User ⁇ authentication ⁇ or ⁇ authorization ⁇ failed).
- the reason value may be a reason value by which the NW notifies the UE that the service, operation, or resource request requested based on the non-specific reason has been rejected, to the UE (Request @ rejected, @unspecified).
- the reason value may be a reason value (Service ⁇ option ⁇ temporarily ⁇ out ⁇ of ⁇ order) that notifies the UE that the NW cannot temporarily receive the service request from the UE.
- the reason value may be a reason value that the NW notifies the UE that the PTI inserted by the UE is already being used (PTI already in use). Also, the reason value may be a reason value that the NW notifies the UE that the UE is outside the LADN service area (Out of service area). Further, the reason value may be a reason value that the NW notifies the UE that only PDU session type IPv4 is permitted (PDU session type IPv4 only allowed). Further, the reason value may be a reason value that the NW notifies the UE that only PDU session type IPv6 is permitted (PDU session type IPv6 only allowed).
- the NW may be a reason value that the NW notifies the UE that the NW does not hold the target PDU session. PDU session does not exist).
- the reason value may be a reason value that the NW notifies the UE that the UE does not support the SSC mode requested by the UE (Not supported SSC mode).
- a reason value indicating to the UE that the NW indicates that the external DN has refused this procedure because the DNN information is not included in this procedure via a specific slice or is an unknown DNN ( Missing or unknown DNN in a slice).
- the reason corresponding to the third congestion management in the reason value in the fifteenth identification information described above is unnecessary, and the fifteenth identification information In the above, the reason, the process, the explanation and the meaning concerning the third congestion management may be omitted from the above description.
- the meaning corresponding to the fourth congestion management in the reason value in the above-described fifteenth identification information is unnecessary, and the fifteenth identification information In the reason value in the above, the processing, explanation and meaning related to the fourth congestion management may be omitted from the above description.
- the fifteenth identification information identifying the first congestion management may be a reason value indicating that resources are insufficient (Insufficient @ resources).
- the fifteenth identification information for identifying the second congestion management may be a reason value indicating that resources for a specific slice are insufficient (Insufficient resource for specific specific slice).
- the fifteenth identification information for identifying the third congestion management may be a reason value indicating that resources for a specific slice and DNN are insufficient (Insufficient resources for specific slice and DNN).
- the fifteenth identification information may be information capable of identifying the type of congestion management, and furthermore, the back-off timer and / or the back-off timer value indicated by the fourteenth identification information may indicate which congestion management May be information indicating whether or not the type corresponds to the type.
- UE_A10 may identify the type of congestion management based on the fifteenth identification information. Further, based on the fifteenth identification information, it may be determined to which congestion management type the back-off timer and / or the back-off timer value indicated by the fourteenth identification information correspond.
- the sixteenth identification information in the present embodiment is one or more identifiers (Indication) information indicating that this procedure has been rejected.
- the indication information may be information indicating the congestion management applied by the NW to this procedure.
- the NW may indicate congestion management applied by the NW based on the sixteenth identification information.
- Indication information in two or more congestion management of the first congestion management to the fourth congestion management, may be information indicating which congestion management NW regulates the UE or not. . Therefore, the NW may transmit a value associated with the regulation management applied to the UE as the indication information. UE grasps in advance the meaning of each value transmitted as Indication information, and in the fifteenth behavior, based on at least the sixteenth identification information, any one of the first congestion management to the fourth congestion management You may identify whether it is congestion management.
- two or more congestion managements of the first to fourth congestion managements are congestion managements that can be identified using Indication information, and the congestion managements to be identified are all four. May be the congestion management, may be the first congestion management and the second congestion management, may be the third congestion management and the fourth congestion management, the second congestion management To the fourth congestion management, or any other combination.
- the Indication information does not necessarily require values corresponding to all of the congestion management to be identified. For example, if the value of the Indication information is assigned to each of the congestion managements except for the congestion management A, the value of the Indication information does not necessarily need to be set for the congestion management A. In this case, the NW and the UE can identify the first congestion management by not transmitting / receiving the Indication information.
- the congestion management A may be any one of the first to fourth congestion managements.
- identification may be included or not included depending on the type of congestion management from the first congestion management to the fourth congestion management. May be.
- NW may use Identification information as information indicating congestion management, depending on the type of congestion management, or may indicate other identification information without using Identification information depending on the type of congestion management. It may be used as information.
- the meaning corresponding to the third congestion management in the Indication information in the sixteenth identification information described above is unnecessary, and the sixteenth identification information Indication information in the above may omit the processing, explanation and meaning related to the third congestion management from the above description.
- the meaning corresponding to the fourth congestion management in the Indication information in the sixteenth identification information described above is unnecessary, and the sixteenth identification information Indication information in the above may omit the processing, explanation and meaning related to the fourth congestion management from the above description.
- the seventeenth identification information in the present embodiment is one or more pieces of Value information indicating that this procedure has been rejected.
- the Value information may be information indicating congestion management applied by the NW to this procedure.
- the seventeenth identification information may be identification information for identifying one or a plurality of NW slices included in the eighteenth identification information, and / or information including at least one of the twelfth identification information. .
- the NW may indicate congestion management applied by the NW based on the seventeenth identification information.
- the NW may indicate which of the first to fourth congestion managements has been applied based on the seventeenth identification information.
- the NW may indicate a DNN and / or S-NSSAI to be subjected to congestion management applied to the UE based on the transmission of the PDU session reject message based on the seventeenth identification information.
- the seventeenth identification information is only DNN # 1, it may indicate that the first congestion management for DNN # 1 is applied.
- the seventeenth identification information is only S-NSSAI # 1
- it may indicate that the second congestion management for S-NSSAI # 1 is applied.
- the seventeenth information is composed of DNN # 1 and S-NSSAI # 1, the third congestion management targeting at least one of DNN # 1 and / or S-NSSAI # 1, or the fourth May be applied.
- the seventeenth identification information does not necessarily need to be information that can identify which congestion management has been applied from the first congestion management to the fourth congestion management. May be information indicating a DNN and / or S-NSSAI to be subjected to congestion management identified by other means, such as identification based on other identification information.
- the eighteenth identification information in the present embodiment may be information indicating that a request for establishing a PDU session belonging to the first NW slice has been rejected, or establishing a PDU session belonging to the first NW slice. Or information indicating that a request for a PDU session change (PDU session modification) is not permitted.
- the first NW slice may be an NW slice determined by the first identification information or may be a different NW slice.
- the eighteenth identification information may be information indicating that establishment of a PDU session belonging to the first NW slice is not permitted in the DN identified by the twelfth identification information, or the thirteenth identification information May be information indicating that establishment of a PDU session belonging to the first NW slice is not permitted in the PDU session identified by.
- the eleventh identification information may be information indicating that establishment of a PDU session belonging to the first slice in the registration area to which UE_A10 currently belongs, and / or the tracking area is not permitted, UE_A10 May be information indicating that establishment of a PDU session belonging to the first NW slice is not permitted in the access network to which is connected. Further, the eleventh identification information may be identification information for identifying one or a plurality of NW slices for determining an NW slice to which the rejected PDU session request belongs. Further, the eighteenth identification information may be identification information indicating auxiliary information for the radio access system to select an appropriate MME when the UE switches the connection destination to the EPS. Note that the auxiliary information may be information indicating DCN @ ID. Further, the eighteenth identification information may be a network slice association rule that is a rule for associating a plurality of pieces of slice information.
- the 21st identification information in the present embodiment may be information for stopping one or a plurality of first timers that the UE is running, and among the first timers that the UE is running, to stop. It may be information indicating the first timer. Specifically, the twenty-first identification information may be information indicating the thirteenth identification information stored by the UE in association with the first timer. Further, the twenty-first identification information may be information indicating at least one of the twelfth to eighteenth identification information stored by the UE in association with the first timer.
- the twenty-first identification information may be information for changing the association between the first timer stored by the UE and information indicating at least one of the thirteenth to seventeenth identification information.
- the first timer that suppresses UE-led session management of the combination of DNN # A and S-NSSAI # A is running, it includes the 21st identification information that permits connection to DNN # A.
- the UE changes the association of the activated timer to only S-NSSAI # A, and recognizes that the UE-led session management request to DNN # A has been permitted. You may.
- the 21st identification information is information indicating that the congestion management applied at the time of receiving the 21st identification information is to be changed to another congestion management among the first to fourth congestion managements. Is also good.
- the initial procedure is also referred to as this procedure, and this procedure includes a registration procedure (Registration @ procedure), a UE-initiated PDU session establishment procedure (PDU @ session @ establishment @ procedure), and a network-initiated session management procedure. Details of the registration procedure, the PDU session establishment procedure, and the network-driven session management procedure will be described later.
- UE_A10 transits to a state registered in the network (RM-REGISTERED state) as each device executes the registration procedure (S900).
- the UE_A10 establishes a PDU session with the DN_A5 providing the PDU connection service via the core network_B190 by executing the PDU session establishment procedure (S902) by each device, and Transitions to the first state (S904).
- this PDU session is assumed to be established via the access network, UPF_A235, but is not limited to this. That is, a UPF (UPF_C239) different from UPF_A235 may exist between UPF_A235 and the access network.
- this PDU session will be established via the access network, UPF_C239, UPF_A235.
- each device in the first state may execute a network-led session management procedure at an arbitrary timing (S906).
- Each device may exchange various capability information and / or various request information of each device in a registration procedure and / or a PDU session establishment procedure and / or a network-driven session management procedure.
- each device exchanges various information and / or negotiates various requests in a registration procedure
- each device exchanges various information and / or negotiates various requests in a PDU session establishment procedure and / or a network-led session management procedure. It may or may not be implemented.
- each device if each device does not exchange various information and / or negotiate various requests in the registration procedure, each device exchanges various information and / or negotiates various requests in the PDU session establishment procedure and / or the network-initiated session. It may be implemented in a management procedure.
- each device exchanges various information and / or negotiates various requests in the registration procedure, each device exchanges various information and / or negotiates various requests in the PDU session establishment procedure and / or the session management led by the network. It may be implemented in a procedure.
- Each device may execute the PDU session establishment procedure in the registration procedure, or may execute the procedure after the registration procedure is completed. Also, when the PDU session establishment procedure is performed in the registration procedure, the PDU session establishment request message may be transmitted and received included in the registration request message, and the PDU session establishment acceptance message may be transmitted and received included in the registration acceptance message. The PDU session establishment complete message may be transmitted and received in a registration complete message, and the PDU session establishment reject message may be transmitted and received in a registration reject message. Also, when the PDU session establishment procedure is performed during the registration procedure, each device may establish a PDU session based on the completion of the registration procedure, or may enter a state in which a PDU session is established between each device. It may transition.
- each device involved in this procedure transmits and receives each control message described in this procedure, thereby transmitting and receiving one or more pieces of identification information included in each control message, and storing each transmitted and received identification information as a context. Is also good.
- the registration procedure is a procedure for UE_A10 to register in a network (access network and / or core network_B190, and / or DN_A5) led by UE_A10.
- UE_A10 can execute this procedure at an arbitrary timing such as when the power is turned on, if the UE_A10 is not registered in the network.
- UE_A10 may start this procedure at an arbitrary timing as long as it is in a non-registered state (RM-DEREGISTERED state).
- each device may transition to a registration state (RM-REGISTERED state) based on completion of the registration procedure.
- this procedure updates the location registration information of UE_A10 in the network, and / or notifies UE_A10 of the state of UE_A10 periodically to the network, and / or updates specific parameters related to UE_A10 in the network. Procedure may be used.
- UE_A10 may start this procedure when mobility across TAs is performed. In other words, UE_A10 may start this procedure when moving to a TA different from the TA indicated in the held TA list. Further, UE_A10 may start this procedure when the running timer expires. Further, the UE_A10 may start this procedure when the context of each device needs to be updated due to disconnection or invalidation (also referred to as deactivation) of the PDU session. Further, the UE_A10 may start this procedure when a change occurs in capability information and / or preferences regarding UE_A10's PDU session establishment. Further, UE_A10 may periodically start this procedure. Note that the UE_A10 is not limited to these, and can execute this procedure at an arbitrary timing as long as the PDU session is established.
- Registration procedure example An example of a procedure for executing the registration procedure will be described with reference to FIG. In this chapter, this procedure refers to the registration procedure. Hereinafter, each step of this procedure will be described.
- UE_A10 via NR node (also referred to as gNB) _A122 and / or ng-eNB, by transmitting a registration request (Registration Request) message to AMF_A240 (S1000) (S1002) (S1004), the registration procedure Start.
- UE_A10 transmits an SM message (for example, a PDU session establishment request message) by transmitting a registration request message including an SM (Session Management) message (for example, a PDU session establishment request message) or together with a registration request message.
- SM Session Management
- UE_A10 transmits an RRC (Radio Resource Control) message including a registration request message to NR node_A122 and / or ng-eNB (S1000).
- RRC Radio Resource Control
- NR node_A122 and / or ng-eNB upon receiving the RRC message including the registration request message, extracts the registration request message from the RRC message, and selects AMF_A240 as the NF or the shared CP function of the routing destination of the registration request message. (S1002).
- NR @ node_A122 and / or ng-eNB may select AMF_A240 based on information included in the RRC message.
- the NR @ node_A122 and / or the ng-eNB transmits or transfers a registration request message to the selected AMF_A240 (S1004).
- the registration request message is a NAS (Non-Access-Stratum) message transmitted and received on the N1 interface.
- the RRC message is a control message transmitted and received between UE_A10 and NR node_A122 and / or ng-eNB.
- the NAS message is processed in the NAS layer, the RRC message is processed in the RRC layer, and the NAS layer is a higher layer than the RRC layer.
- UE_A10 may transmit a registration request message for each NSI when there are a plurality of NSIs requesting registration, and may transmit a plurality of registration request messages included in one or more RRC messages. Good. Further, the plurality of registration request messages may be transmitted as one registration request message included in one or more RRC messages.
- AMF_A240 executes a first condition determination upon receiving a registration request message and / or a control message different from the registration request message.
- the first condition determination is for determining whether AMF_A240 accepts the request of UE_A10.
- AMF_A240 determines whether the first condition determination is true or false.
- AMF_A240 starts the procedure of (A) in this procedure when the first condition determination is true (i.e., when the network accepts the request of UE_A10), and when the first condition determination is false (i.e., If the network does not accept the request from UE_A10), the procedure (B) in this procedure is started.
- AMF_A240 executes the fourth condition determination, and starts the procedure (A) in this procedure.
- the fourth condition determination is for determining whether or not the AMF_A240 transmits / receives an SM message to / from the SMF_A230.
- the fourth condition determination may be to determine whether or not the AMF_A240 performs the PDU session establishment procedure during this procedure.
- AMF_A240 when the fourth condition determination is true (that is, when AMF_A240 carries out transmission and reception of SM messages with SMF_A230), selection of SMF_A230, and transmission and reception of SM messages with the selected SMF_A230 Are executed, and when the fourth condition determination is false (that is, when the AMF_A240 does not transmit / receive the SM message to / from the SMF_A230), they are omitted (S1006).
- the AMF_A240 may cancel the procedure (A) in this procedure and start the procedure (B) in this procedure.
- AMF_A240 transmits a registration acceptance (Registration_Accept) message to UE_A10 via NR node_A122, based on the reception of the registration request message from UE_A10, and / or the completion of the transmission and reception of the SM message with SMF_A230. (S1008). For example, when the fourth condition determination is true, AMF_A240 may transmit a registration acceptance message based on receiving a registration request message from UE_A10. Further, when the fourth condition determination is false, AMF_A240 may transmit a registration acceptance message based on completion of transmission and reception of the SM message with SMF_A230.
- the registration acceptance message may be transmitted as a response message to the registration request message.
- the registration acceptance message is a NAS message transmitted and received on the N1 interface, for example, AMF_A240 transmits as a control message of the N2 interface to NR node_A122, and the NR node_A122 that receives this transmits an RRC message to UE_A10. May be transmitted.
- the AMF_A240 transmits the registration acceptance message including the SM message (e.g., the PDU session establishment acceptance message), or together with the registration acceptance message, the SM message (e.g., the PDU Session establishment acceptance message).
- This transmission method may be executed when the SM message (for example, the PDU session establishment request message) is included in the registration request message and the fourth condition determination is true. Further, this transmission method may be executed when the SM message (for example, the PDU session establishment request message) is included together with the registration request message, and the fourth condition determination is true.
- AMF_A240 may indicate that the procedure for the SM has been accepted by performing such a transmission method.
- # UE_A10 receives the registration acceptance message via NR # node_A122 (S1008).
- UE_A10 recognizes the contents of various kinds of identification information included in the registration acceptance message by receiving the registration acceptance message.
- UE_A10 transmits a registration completion (Registration @ Complete) message to AMF_A240 based on the reception of the registration acceptance message (S1010).
- UE_A10 when receiving an SM message such as a PDU session establishment acceptance message, may transmit a registration completion message including an SM message such as a PDU session establishment completion message, or may include an SM message.
- the registration completion message may be transmitted as a response message to the registration acceptance message.
- the registration completion message is a NAS message transmitted and received on the N1 interface, for example, UE_A10 is included in the RRC message for NR node_A122 and transmitted, and the NR node_A122 that receives this is AMF_A240 and the N2 interface It may be transmitted as a control message.
- each device receives the registration completion message (S1010). Further, each device completes the procedure (A) in this procedure based on the transmission and reception of the registration acceptance message and / or the registration completion message.
- the AMF_A240 starts the procedure (B) in this procedure by transmitting a registration rejection (Registration @ Reject) message to the UE_A10 via the NR @ node_A122 (S1012).
- the registration rejection message may be transmitted as a response message to the registration request message.
- the registration rejection message is a NAS message transmitted and received on the N1 interface, for example, AMF_A240 transmits as a control message of the N2 interface to NR node_A122, and the NR node_A122 that has received this is an RRC message for UE_A10. May be transmitted.
- the registration rejection message transmitted by AMF_A240 is not limited to this, as long as the message rejects the request of UE_A10.
- the procedure of (B) in this procedure may be started when the procedure of (A) in this procedure is stopped.
- the AMF_A240 may transmit the registration rejection message including an SM message indicating rejection such as a PDU session establishment rejection message, or may transmit the rejection.
- the inclusion of a meaningful SM message may indicate that the procedure for the SM has been rejected.
- UE_A10 may further receive an SM message indicating rejection, such as a PDU session establishment rejection message, or recognize that the procedure for SM has been rejected.
- UE_A10 may recognize that the request of UE_A10 has been rejected by receiving the registration rejection message or not receiving the registration acceptance message.
- Each device completes the procedure (B) in this procedure based on the transmission and reception of the registration rejection message.
- Each device completes this procedure (registration procedure) based on the completion of procedure (A) or (B) in this procedure.
- each device may transition to the state (RM_REGISTERED @ state) where UE_A10 is registered in the network based on the completion of the procedure (A) in this procedure, or may perform the procedure in (B) in this procedure.
- UE_A10 may be maintained in a state in which UE_A10 is not registered in the network (RM_DEREGISTERED @ state), based on the completion of.
- the transition of each device to each state may be performed based on the completion of this procedure, or may be performed based on the establishment of a PDU session.
- each device may execute processing based on the identification information transmitted and received in this procedure.
- the first condition determination may be performed based on the identification information and / or the subscriber information included in the registration request message and / or the operator policy. For example, the first condition determination may be true if the network grants the request for UE_A10. The first condition determination may be false when the network does not permit the request of UE_A10. Furthermore, the first condition determination may be true if the network to which UE_A10 is registered, and / or a device in the network supports the function requested by UE_A10, and false if not. Good. Further, the first condition determination may be true when the network determines that the network is in a congestion state, and may be false when it determines that the network is not in a congestion state. Note that the condition for determining whether the first condition is true or false is not limited to the above-described condition.
- the fourth condition determination may be performed based on whether the AMF_A240 has received the SM, or may be performed based on whether the registration request message includes the SM message. For example, the fourth condition determination may be true if AMF_A240 receives the SM, and / or if the registration request message includes the SM message, if AMF_A240 does not receive the SM, and If the SM message is not included in the registration request message, it may be false.
- the condition for determining whether the fourth condition is true or false is not limited to the above-described condition.
- the PDU session establishment procedure is also referred to as this procedure.
- This procedure is for each device to establish a PDU session.
- Each device may execute this procedure in a state where the registration procedure is completed, or may execute the procedure in the registration procedure.
- each device may start this procedure in the registered state, or may start this procedure at an arbitrary timing after the registration procedure.
- each device may establish a PDU session based on the completion of the PDU session establishment procedure.
- each device may establish a plurality of PDU sessions by executing this procedure a plurality of times.
- PDU session establishment procedure example An example of a procedure for executing the PDU session establishment procedure will be described with reference to FIG. Hereinafter, each step of this procedure will be described.
- UE_A10 starts a PDU session establishment procedure by transmitting a PDU Session Establishment Request message (PDU Session Establishment Request) to core network_B via access network_B (S1100).
- PDU Session Establishment Request PDU Session Establishment Request
- UE_A10 transmits a PDU session establishment request message to AMF_A240 in core network_B190 via NR node_A122 using the N1 interface (S1100).
- AMF_A receives the PDU session establishment request message and performs the third condition determination.
- the third condition determination is for AMF_A to determine whether to accept the request of UE_A10.
- AMF_A determines whether the fifth condition determination is true or false.
- the core network _B starts processing # 1 in the core network when the third condition determination is true (S1101), and executes the procedure (B) in this procedure when the third condition determination is false. Start. Steps when the third condition determination is false will be described later.
- process # 1 in the core network may be SMF selection by AMF_A in core network_B190 and / or transmission / reception of a PDU session establishment request message between AMF_A and SMF_A.
- the core network_B190 starts processing # 1 in the core network.
- AMF_A240 selects SMF_A230 as the NF of the routing destination of the PDU session establishment request message, and transmits or transfers the PDU session establishment request message to the selected SMF_A230 using the N11 interface. Is also good.
- the AMF_A240 may select the routing destination SMF_A230 based on the information included in the PDU session establishment request message. More specifically, the AMF_A240 indicates each identification information obtained based on the reception of the PDU session establishment request message, and / or subscriber information, and / or network capability information, and / or operator policy, and / or network information.
- the routing destination SMF_A230 may be selected based on the state and / or the context already held by the AMF_A240.
- the PDU session establishment request message may be a NAS message. Further, the PDU session establishment request message may be a message requesting the establishment of a PDU session, and is not limited to this.
- UE_A10 in the PDU session establishment request message, may include one or more identification information of the first to fourth identification information, by including these identification information, indicating the request of UE_A10 Is also good.
- two or more pieces of identification information of these pieces of identification information may be configured as one or more pieces of identification information.
- UE_A10, the first identification information, and / or the second identification information, and / or the third identification information, and / or by transmitting the fourth identification information included in the PDU session establishment request message May request the establishment of a PDU session belonging to a network slice, may request the UE_A10, may indicate the network slice to which the PDU session belongs, or may indicate the network slice to which the PDU session will belong. Good.
- UE_A10 by transmitting the first identification information and the second identification information in association, in a PDU session established for the DN identified by the second identification information, the network It may request establishment of a PDU session belonging to the slice, may indicate the network slice to which the UE_A10 requests, to which the PDU session belongs, or may indicate the network slice to which the PDU session will belong.
- UE_A10 may make a request combining the above-mentioned matters by transmitting a combination of two or more pieces of identification information among the first to fourth pieces of identification information. Note that what the UE_A10 indicates by transmitting each piece of identification information may not be limited to these.
- the UE_A10 determines which identification information of the first to fourth identification information to be included in the PDU session establishment request message by the UE_A10 capability information and / or a policy such as a UE policy, and / or a UE_A10 The determination may be based on a reference and / or an application (upper layer). Note that the determination by the UE_A10 which identification information is included in the PDU session establishment request message is not limited to this.
- the SMF_A230 in the core network_B190 receives the PDU session establishment request message, and performs the third condition determination.
- the third condition determination is for the SMF_A230 to determine whether to accept the request of UE_A10.
- the SMF_A230 determines whether the third condition determination is true or false.
- the SMF_A230 starts the procedure (A) in the present procedure when the third condition determination is true, and starts the procedure (B) in the present procedure when the third condition determination is false. Steps when the third condition determination is false will be described later.
- SMF_A230 selects UPF_A235 as the establishment destination of the PDU session, and executes the eleventh condition determination.
- the eleventh condition determination is for determining whether or not each device executes the process # 2 in the core network.
- the process # 2 in the core network is the start and / or execution of the PDU session establishment authentication procedure by each device, and / or a session establishment request (Session Establishment request) message between SMF_A and UPF_A in the core network_B190. And / or transmission and reception of a session establishment response (Session @ Establishment @ response) message (S1103).
- the SMF_A230 determines whether the eleventh condition determination is true or false.
- the SMF_A230 starts the PDU session establishment authentication approval procedure when the eleventh condition determination is true, and omits the PDU session establishment authentication approval procedure when the eleventh condition determination is false.
- the details of the PDU session establishment authentication approval procedure of process # 2 in the core network will be described later.
- the SMF_A230 transmits a session establishment request message to the selected UPF_A235, and starts the procedure (A) in this procedure. I do. Note that the SMF_A230 may start the procedure (B) in this procedure based on the completion of the PDU session establishment authentication approval procedure without starting the procedure (A) in this procedure.
- SMF_A230 is each identification information obtained based on the reception of the PDU session establishment request message, and / or network capability information, and / or subscriber information, and / or operator policy, and / or network status, And / or select one or more UPF_A235 based on the context already held by SMF_A230.
- the SMF_A230 may transmit a session establishment request message to each UPF_A235.
- UPF_A235 receives the session establishment request message and creates a context for the PDU session. Further, UPF_A 235 receives the session establishment request message and / or sends a session establishment response message to SMF_A 230 based on creating a context for the PDU session. Further, SMF_A230 receives the session establishment response message.
- the session establishment request message and the session establishment response message may be control messages transmitted and received on the N4 interface. Further, the session establishment response message may be a response message to the session establishment request message.
- the SMF_A230 may perform address assignment of an address to be assigned to the UE_A10 based on reception of the PDU session establishment request message and / or selection of the UPF_A235 and / or reception of the session establishment response message. Note that the SMF_A230 may perform the address allocation of the address to be allocated to the UE_A10 during the PDU session establishment procedure or may perform the address allocation after the PDU session establishment procedure is completed.
- the SMF_A230 may perform address allocation during the PDU session establishment procedure, or may transmit the allocated address to the UE_A10. Further, SMF_A230, when assigning an IPv4 address using DHCPv4 or DHCPv6 or SLAAC (Stateless Address Autoconfiguration), and / or an IPv6 address, and / or an IPv6 prefix, after the PDU session establishment procedure, the address may be assigned, The assigned address may be transmitted to UE_A10.
- the address assignment performed by the SMF_A230 is not limited to these.
- SMF_A230 based on the completion of the address assignment of the address assigned to UE_A10, may include the assigned address included in the PDU session establishment acceptance message and transmit to UE_A10, after the completion of the PDU session establishment procedure, transmitted to UE_A10 May be.
- the SMF_A230 receives the PDU session establishment request message, and / or selects the UPF_A235, and / or receives the session establishment response message, and / or based on the completion of the address assignment of the address assigned to the UE_A10, to the UE_A10 via the AMF_A240.
- a PDU session establishment acceptance (PDU @ session @ establishment @ accept) message is transmitted (S1110).
- SMF_A230 transmits a PDU session establishment acceptance message to AMF_A240 using the N11 interface
- AMF_A240 that has received the PDU session establishment acceptance message transmits a PDU session establishment acceptance message to UE_A10 using the N1 interface.
- the PDU session establishment acceptance message may be a PDN connection acceptance (PDN connectivity accept) message.
- PDN connectivity accept PDN connectivity accept
- the PDU session establishment acceptance message may be a NAS message transmitted and received on the N11 interface and the N1 interface.
- the PDU session establishment acceptance message is not limited to this, and may be a message indicating that the establishment of the PDU session has been accepted.
- UE_A10 receives the PDU session establishment acceptance message from SMF_A230. UE_A10 recognizes the contents of various types of identification information included in the PDU session establishment acceptance message by receiving the PDU session establishment acceptance message.
- UE_A10 transmits a PDU session establishment completion (PDU @ session @ establishment @ complete) message to SMF_A230 via AMF_A240 based on the completion of the reception of the PDU session establishment acceptance message (S1114). Further, the SMF_A230 receives the PDU session establishment completion message, and executes the second condition determination.
- PDU session establishment completion PDU @ session @ establishment @ complete
- UE_A10 transmits a PDU session establishment completion message to AMF_A240 using the N1 interface
- AMF_A240 that has received the PDU session establishment completion message transmits a PDU session establishment completion message to SMF_A230 using the N11 interface.
- the PDU session establishment completion message may be a PDN connection complete (PDN @ Connectivity @ complete) message or a default EPS bearer context activation acceptance (Activate @ default @ EPS @ bearer @ context @ accept) message.
- the PDU session establishment completion message may be a NAS message transmitted and received on the N1 interface and the N11 interface.
- the PDU session establishment completion message may be a response message to the PDU session establishment acceptance message, and is not limited thereto, and may be a message indicating that the PDU session establishment procedure is completed.
- the second condition determination is for the SMF_A230 to determine the type of message transmitted and received on the N4 interface. If the second condition determination is true, processing # 3 in the core network may be started (S1115). Here, the process # 3 in the core network may include transmission / reception of a session change request (Session @ Modification @ request) message and / or transmission / reception of a session change response (Session @ Modification @ response) message. SMF_A230 transmits a session change request message to UPF_A235, and further receives a session change acceptance message transmitted by UPF_A235 that has received the session change request message. When the second condition determination is false, the SMF_A230 executes the process # 2 in the core network. That is, SMF_A transmits a session establishment request message to UPF_A235, and further receives a session change acceptance message transmitted by UPF_A235 that has received the session establishment request message.
- Each device transmits / receives a PDU session establishment completion message, and / or transmits / receives a session change response message, and / or transmits / receives a session establishment response message, and / or transmits / receives a RA (Router Advertisement). Complete the procedure in (A).
- SMF_A230 transmits a PDU session establishment rejection (PDU @ session @ establishment @ reject) message to UE_A10 via AMF_A240 (S1122), and starts the procedure (B) in this procedure.
- PDU session establishment rejection PDU @ session @ establishment @ reject
- SMF_A230 transmits a PDU session establishment rejection message to AMF_A240 using the N11 interface
- AMF_A240 that has received the PDU session establishment request message transmits a PDU session establishment rejection message to UE_A10 using the N1 interface.
- the PDU session establishment rejection message may be a PDN connection rejection (PDN connectivity reject) message. Further, the PDU session establishment reject message may be a NAS message transmitted and received on the N11 interface and the N1 interface.
- PDN connectivity reject PDN connectivity reject
- the PDU session establishment rejection message is not limited to this, and may be any message indicating that the establishment of the PDU session has been rejected.
- SMF_A230 the PDU session establishment rejection message
- SMF_A230 may include one or more identification information among the eleventh to eighteenth identification information, by including these identification information, the request of UE_A10 is rejected May be shown.
- two or more pieces of identification information of these pieces of identification information may be configured as one or more pieces of identification information.
- the SMF_A230 has the eleventh identification information, and / or the twelfth identification information, and / or the thirteenth identification information, and / or the fourteenth identification information, and / or the fifteenth identification information, and / or By transmitting the sixteenth identification information and / or the seventeenth identification information and / or the eighteenth identification information in the PDU session establishment rejection message, the request to establish the PDU session belonging to the network slice is rejected. May be indicated, or may indicate a network slice not allowed to belong to the PDU session.
- the SMF_A230 transmits the eighteenth identification information and the twelfth identification information in association with each other, so that a network is established in the PDU session established for the DN identified by the twelfth identification information. It may indicate that a request to establish a PDU session belonging to the slice has been rejected, or may indicate a network slice not allowed to belong to the PDU session.
- SMF_A230 by transmitting the 18th identification information included in the PDU session establishment rejection message, the registration area to which UE_A10 currently belongs, and / or, in the tracking area, the PDU session belonging to the network slice It may indicate that the request for establishment has been rejected, or indicate a network slice that is not allowed to belong to the PDU session.
- SMF_A230 by transmitting the eighteenth identification information included in the PDU session establishment rejection message, in the access network to which UE_A10 is currently connected, the request for the establishment of the PDU session belonging to the network slice was rejected May be indicated, or a network slice not allowed to belong to the PDU session may be indicated.
- the SMF_A230 may indicate the value of the first timer by transmitting the eleventh identification information and / or the fourteenth identification information in the PDU session establishment rejection message, or after completion of this procedure. It may indicate whether the same procedure as this procedure should be performed again.
- the SMF_A230 may make a request combining the above-mentioned matters by transmitting a combination of two or more pieces of identification information among the eleventh to eighteenth pieces of identification information. Note that what the SMF_A230 indicates by transmitting each piece of identification information may not be limited to these.
- the SMF_A230 determines which identification information among the eleventh to eighteenth identification information is to be included in the PDU session establishment rejection message, based on the received identification information, and / or network capability information, and / or operator policy. And / or the state of the network.
- the twelfth identification information may be information indicating the same DNN as the DNN indicated by the second identification information.
- the thirteenth identification information may be information indicating the same PDU session ID as the PDU session ID indicated by the third identification information.
- the eighteenth identification information may be information transmitted when the first identification information is received and / or when the network slice indicated by the first identification information is not permitted by the network. Note that the determination by the SMF_A230 which identification information is included in the PDU session establishment rejection message is not limited to this.
- the core network_B190 notifies the congestion management applied to the UE_A10 by transmitting the PDU session rejection message.
- the core network _B190 to apply congestion management to UE_A10, and / or to indicate that to perform congestion management to UE_A10, and / or information to identify the type of congestion management to apply And, and / or information to identify the target of congestion management such as DNN and / or S-NSSAI corresponding to the applied congestion management, and / or to notify the value of the timer associated with the applied congestion management Is also good.
- each piece of information described above may be information identified by one or more pieces of identification information from the eleventh identification information to the eighteenth identification information.
- the PDU session establishment rejection message received by UE_A10 from SMF_A230 may include one or more pieces of identification information from the eleventh to eighteenth identification information.
- UE_A10 performs the fourth process based on the reception of the PDU session establishment rejection message (S1124). UE_A10 may perform the fourth process based on the completion of this procedure.
- the fourth process may be a process in which UE_A10 recognizes the matter indicated by SMF_A230. Further, the fourth process may be a process in which UE_A10 stores the received identification information as a context, or may be a process of transferring the received identification information to an upper layer and / or a lower layer. . Further, the fourth process may be a process in which UE_A10 recognizes that the request for this procedure has been rejected.
- the fourth process is a process in which the UE_A10 sets the value indicated by the fourteenth identification information to the first timer value. Alternatively, it may be a process of starting a first timer in which a timer value is set. Furthermore, when UE_A10 receives the eleventh identification information, the fourth process may be a process of executing one or more of the first to eleventh behaviors.
- the fourth processing is UE_A10
- the information for identifying the NW slice included in the eighteenth identification information, the eighteenth identification information May be a process of executing the twelfth behavior based on the network slice association rule included in the UE or the network slice association rule stored and set in advance by UE_A10.
- the fourth process, UE_A10, a plurality of first timers included in each 14th identification information, UE_A10 A process for executing the thirteenth behavior may be performed based on the priority management rule of the held back-off timer.
- the fourth process UE_A10 is based on a plurality of first timers included in each 14th identification information, The processing for executing the fourteenth behavior may be performed.
- the twelfth to fifteenth behaviors may be congestion management led by UE_A10 based on rules and / or policies inside UE_A10.
- UE_A10 stores a policy (UE policy; UE policy) and / or rule, a policy and / or rule management function, and a policy and / or Or, a policy enforcer that operates UE_A10 based on rules, one or more applications, and a session management instance (session) for managing one or more PDU sessions that establish or attempt to establish based on a request from each application. Manager), and the congestion management led by UE_A10 may be realized by executing any of the twelfth to fifteenth behaviors as the fourth processing based on these.
- the policy and / or rule may include one or more of network slice association rule, and / or priority management rule of back-off timer, and / or NSSP (Network Slice Selection Policy), and , May be set in the UE_A10 in advance, or may be received from the network.
- the policy enforcer may be NSSP @ enforcer.
- the application may be an application layer protocol, or may attempt to establish or establish a PDU session based on a request from the application layer protocol.
- the session management instance may be a software element that is dynamically generated for each PDU session.
- S-NSSAI may be grouped, or processing based on S-NSSAI grouping may be executed. Note that the internal configuration and processing of the UE_A10 are not limited to these, and each element may be realized by software, or may be executed as software processing inside the UE_A10.
- UE_A10 may switch to EPS in the fourth process or based on completion of the fourth process, and may start location registration in EPS based on DCN ID included in the eighteenth identification information. Good. Note that switching of UE_A10 to EPS may be based on a handover procedure, or may be RAT switching led by UE_A10. Further, when receiving the eighteenth identification information including the DCN @ ID, UE_A10 may execute switching to EPS during the fourth processing or after completion of the fourth processing.
- the fourth process may be a process in which UE_A10 starts this procedure again after a certain period of time, or a process in which the request of UE_A10 transits to a limited or limited state.
- UE_A10 may transition to the first state upon completion of the fourth process.
- the fourth process may be a process in which UE_A10 recognizes the matter indicated by SMF_A230. Further, the fourth process may be a process in which UE_A10 stores the received identification information as a context, or may be a process of transferring the received identification information to an upper layer and / or a lower layer. .
- a process of identifying application of congestion management may be executed based on at least one of the eleventh to eighteenth identification information.
- this processing may be the processing described in the fifteenth behavior.
- the fourth processing based on one or more pieces of identification information from the eleventh to eighteenth pieces of identification information, the first timer indicated by the fourteenth identification information associated with the applied congestion management May be identified and set, and the count of the first timer may be started. More specifically, this processing may be the processing described in the eighth behavior.
- one or more of the first to seventh behaviors may be executed in accordance with the start or completion of any of the above-described processes.
- one or more of the ninth to fifteenth behaviors may be executed with the start or completion of any of the above-described processings.
- UE_A10 may transition to the first state upon completion of the fourth process.
- the fourth process is a process in which a part of the plurality of detailed processes described in the first example and a part of the plurality of detailed processes described in the second example are combined. Is also good.
- UE_A10 may recognize that the request of UE_A10 has been rejected by receiving the PDU session establishment rejection message or not receiving the PDU session establishment acceptance message. Each device completes the procedure (B) in this procedure based on the transmission and reception of the PDU session establishment rejection message.
- Each device completes this procedure based on the completion of procedure (A) or (B) in this procedure. Note that each device may transition to the state in which the PDU session is established based on the completion of the procedure (A) in this procedure, or may perform processing based on the completion of the procedure (B) in this procedure. It may recognize that this procedure has been rejected, may transition to a state in which a PDU session has not been established, or may transition to a first state.
- each device may execute processing based on the identification information transmitted and received in this procedure.
- UE_A10 may execute the fourth process based on the completion of this procedure, or may transition to the first state after the completion of the fourth process.
- the third condition determination may be performed based on identification information and / or subscriber information included in the PDU session establishment request message and / or operator policy. For example, the third condition determination may be true if the network permits the request of UE_A10. Further, the third condition determination may be false when the network does not permit the request of UE_A10. Further, the third condition determination may be true if the network to which UE_A10 is connected, and / or a device in the network supports the function requested by UE_A10, and false if not. Good. Furthermore, the third condition determination may be true when the network determines that the network is in a congestion state, and may be false when it determines that the network is not in a congestion state. Note that the condition for determining whether the third condition is true or false is not limited to the above-described condition.
- the second condition determination may be performed based on whether or not a session on the N4 interface for the PDU session has been established. For example, the second condition determination may be true if the session on the N4 interface for the PDU session has been established and false if it has not been established.
- the condition for determining whether the second condition is true or false is not limited to the above-described condition.
- the eleventh condition determination may be performed based on the identification information and / or the subscriber information and / or the operator policy included in the PDU session establishment request message. For example, the eleventh condition determination may be true if the network permits the authentication and / or authorization by DN_A5 to be performed during this procedure. In addition, the eleventh condition determination may be false when the network does not permit the authentication and / or the authorization by the DN_A5 to be performed in this procedure. Furthermore, the eleventh condition determination is true if the network to which UE_A10 is connected and / or devices in the network support performing authentication and / or authorization by DN_A5 during this procedure. If it doesn't support it, it can be false.
- the eleventh condition determination may be true when the 61st identification information has been received, and may be false when not receiving it. In other words, the eleventh condition determination may be true if information such as SM ⁇ PDU ⁇ DN ⁇ Request ⁇ Container and / or a container including a plurality of information is received, and false if not received. Good.
- the condition for determining whether the eleventh condition is true or false is not limited to the above-described condition.
- the core network_B190 notifies the congestion management to be applied to the UE_A10, and the UE_A10 can apply the congestion management indicated by the core network_B190.
- the core network B190 and the UE_A10 may apply a plurality of congestion managements by executing the procedure and processing described in this procedure a plurality of times.
- each congestion management applied is different types of congestion management, and / or congestion management corresponding to different DNNs, and / or congestion management corresponding to different S-NNSAIs, and / or a combination of DNN and S-NSSAI. May be congestion management.
- This procedure is a procedure for session management that is led by the network for the established PDU session. Note that this procedure may be executed at any timing after the above-described registration procedure and / or PDU session establishment procedure has been completed and each device has transitioned to the first state. In addition, each device may transmit and receive a message including identification information for stopping or changing the congestion management during this procedure, or based on a new congestion management instructed by the network based on completion of this procedure. The behavior may start.
- UE_A10 may stop applying the congestion management identified based on the control information transmitted and received by this procedure.
- the core network _B190 stops the application of the congestion management that can be identified using these control information by initiating this procedure, and further transmitting a control message and control information of this procedure to the UE_A10.
- UE_A10 can be notified.
- This procedure may be a network-initiated PDU session change (PDU session modification) procedure and / or a network-initiated PDU session release (PDU session release) procedure, or is not limited thereto. May be performed.
- Each device may transmit and receive a PDU session change message in a network-initiated PDU session change procedure, or may transmit and receive a PDU session release message in a network-initiated PDU session release procedure.
- the UE_A10 and each device in the core network_B190 that have transitioned to the first state (S1200) perform network-based session management at an arbitrary timing.
- the device in the core network_B 190 that initiates this procedure may be SMF_A and / or AMF_A, and UE_A may send and receive messages in this procedure via AMF_A and / or access network_B. .
- the device in the core network_B190 transmits a network-led session management request message to UE_A (S1202).
- the device in the core network_B190 may include the 21st identification information in the network-led session management request message, or may indicate the request of the core network_B190 by including this identification information. .
- UE_A that has received the network-led session management request message transmits a network-led session management completion message (S1204). Further, UE_A may execute fifth processing based on the twenty-first identification information received from core network_B190 (S1206), and may complete this procedure. UE_A10 may perform the fifth process based on completion of this procedure.
- the fifth process may be a process in which UE_A10 recognizes a matter indicated by core network_B190, or may be a process in which UE_A10 recognizes a request from core network_B190. Further, the fifth process may be a process in which UE_A10 stores the received identification information as a context, or may be a process of transferring the received identification information to an upper layer and / or a lower layer. .
- the message transmitted and received in the network-led session management request may be a PDU session change command (PDU (SESSION MODIFICATION COMMAND) or a PDU session release command (PDU SESSION RELEASE COMMAND), or Not limited to
- PDU PDU session change command
- PDU RELEASE COMMAND PDU session release command
- the UE_A10 may perform the congestion management identification process applied by the UE_A10 based on the received twenty-first identification information in the fifth process.
- the congestion management identification process may be a seventeenth behavior.
- the fifth process may be a sixteenth behavior. Specifically, for example, it may be a process of stopping one or a plurality of timers being executed based on the above-described fourth process.
- UE_A10 that has received the 21st identification information, by executing the 17th behavior, identifies a congestion management that performs a stop or change instructed from the network, and then executes the 16th behavior As a result, the identified congestion management is stopped or changed.
- each device may execute processing based on the identification information transmitted and received in this procedure.
- UE_A10 may perform the fifth process based on the completion of this procedure, or may complete this procedure after the completion of the fifth process.
- the core network_B190 can instruct the UE_A10 to stop or change the congestion management already applied to the UE_A10 by transmitting and receiving the network-initiated session management request message. Further, the UE_A10 can stop or change the congestion management applied to the UE_A10 based on the network-led session management request message.
- the congestion management to stop or change is identified. May be.
- each congestion management applied is different types of congestion management, and / or congestion management corresponding to different DNNs, and / or congestion management corresponding to different S-NNSAIs, and / or a combination of DNN and S-NSSAI. May be congestion management.
- the procedure described in the first example of the network-initiated session management procedure described in section 1.3.3.1 may be a procedure executed in accordance with congestion management.
- UE_A10 applies one or more of the congestion management, the first congestion management, the third congestion management, and the procedure executed for the congestion management classified as the fourth congestion management Good.
- the UE_A10 may stop the first congestion management, the third congestion management, and the congestion management corresponding to the fourth congestion management by the fifth processing.
- the second The response may be made to the core network_B190 without stopping the back-off timer associated with the congestion management.
- UE_A10 may respond to core network_B190 without stopping the back-off timer associated with S-NSSAI # A.
- UE_A10 in receiving the network-led session management request message, UE_A10 transmits a response message to the network-led session management request message to the core network_B190, May be continued. Therefore, the state in which the transmission of the UE-led session management request message regulated by the second congestion management is suppressed may be continued.
- the network-led session management request message in the present embodiment may be a PDU session change command (PDU (SESSION MODIFICATION COMMAND) message in a network-led PDU session change (PDU session modification) procedure.
- PDU PDU session change command
- PDU session modification PDU session modification
- PDU session release command PDU @ SESSION @ RELEASE @ COMMAND
- the network-driven session management completion message that responds to the PDU session change command message in the present embodiment may be a PDU session change completion message (PDU SESSION MODIFICATION COMPLETE), and the PDU in the present embodiment.
- the network initiated session management completion message that responds to the session release command message may be a PDU session release completion message (PDU @ SESSION @ RELEASE @ COMPLETE).
- the network-initiated session management request message is a PDU session change command and / or a PDU session release message
- the UE_A10 and the core network_B190 execute the more detailed processing described below in addition to the processing described above. May be set.
- the core network_B190 may execute the following process.
- the information indicating the reactivation request (ReactivationReRequired) is information indicating that activation is requested, and as a specific example, is a 5G session management reason value # 39 (5GSM Cause # 39). Good.
- UE_A10 when receiving the network-led session management request message including the information indicating the reactivation request (Reactivation Required), immediately leads the UE-led PDU session establishment procedure again immediately after the completion of the network-led session management procedure. Instead, the UE initiates the UE-initiated PDU session establishment procedure again after the congestion management is released.
- this UE-initiated PDU session establishment procedure the PDU session type provided in the UE-initiated PDU establishment procedure when establishing a PDU session to be changed or released, UE-initiated for SSC mode, DNN and S-NSSAI PDU session establishment procedure.
- Waiting for the release of the congestion management may be executed after the timer associated with the second congestion management has expired (Expire). In other words, it may be executed after the count of the timer associated with the second congestion management is completed and / or after the timer value associated with the second congestion management becomes zero.
- UE_A10 may further include the following supplementary information in the network-led session management completion message.
- the supplementary information may be information indicating that the timer is waiting for expiration and / or information indicating the remaining timer value.
- the timer may be a timer associated with the second congestion management. Waiting for the expiration of the timer may be executed after the expiration of the timer (Expire). In other words, it may be executed after the count of the timer associated with the second congestion management is completed and / or after the timer value associated with the second congestion management becomes zero.
- the core network B_190 may receive the network-initiated session management completion message including the supplementary information and recognize the value of the remaining timer. Furthermore, it may recognize that the UE-initiated PDU session establishment procedure is initiated after the time indicated by the remaining timer has elapsed.
- the remaining timer recognized by the core network_B190 may be a value indicated by the received supplementary information, or an offset between the transmission time of the UE_A10 of the network-initiated session management completion message and the reception time of the core network_B190. May be a value that takes into account the value indicated by the received supplementary information.
- the first process and the procedure example when the information indicating the reactivation request is received are not limited to the second process and the procedure example when the information indicating the reactivation request is received as described below. It may be performed.
- UE_A10 in receiving the network-led session management request message, UE_A10 transmits a response message to the network-led session management request message to the core network_B190.
- congestion management may be continued. Therefore, while the transmission of the UE-led session management request message regulated by the second congestion management is suppressed, the UE_A10 and / or the core network_B190 perform a UE-led PDU session establishment procedure. It may be set to be permitted as long as it is led again.
- UE_A10 receives the network-initiated session management request message including the information indicating the reactivation request (Reactivation Required), UE-initiated PDU session after the completion of the network-initiated network-initiated session management procedure Lead the establishment procedure again.
- this UE-initiated PDU session establishment procedure the PDU session type provided in the UE-initiated PDU establishment procedure when establishing a PDU session to be changed or released, UE-initiated for SSC mode, DNN and S-NSSAI PDU session establishment procedure.
- UE_A10 while the application of the congestion management continues, UE_A10 and the core network # B190 may execute and complete the procedure allowed as an exception, UE_A10 is suppressed by the second congestion management Initiation of other UE-initiated session management procedures may be suppressed.
- the present invention is not limited to the first and second processes and the procedure example when the information indicating the reactivation request is received, and the third process and the process when the information indicating the reactivation request is received as described below.
- An example procedure may be performed.
- UE_A10 upon receiving the network-led session management request message, UE_A10 transmits a response message to the network-led session management request message to core network_B190. Further, when receiving a network-led session management request message including information indicating a reactivation request (Reactivation @ Required), UE_A10 may stop applying the second congestion management.
- UE_A10 may continue congestion management if the network-initiated session management request message does not include information indicating a reactivation request (Reactivation @ Required). In this case, the state where the transmission of the UE-led session management request message regulated by the second congestion management may be suppressed may be continued.
- UE_A10 when receiving a network-initiated session management request message containing information indicating a reactivation request (ReactivationdRequired), UE-initiated PDU session establishment after the completion of the network-initiated network-initiated session management procedure Lead the procedure again.
- this UE-initiated PDU session establishment procedure the PDU session type provided in the UE-initiated PDU establishment procedure when establishing a PDU session to be changed or released, UE-initiated for SSC mode, DNN and S-NSSAI PDU session establishment procedure.
- the information indicating the reactivation request is transmitted by the core network_B190, as described below, without being limited to the first, second, and third processing and the procedure example when the information indicating the reactivation request is received. May not be set.
- the core network _B190 when transmitting a network-led session management request message to UE_A10 to which congestion management is applied, the core network _B190 includes information indicating a reactivation request (Reactivation Required). It may be set to suppress.
- the core network_B190 when transmitting a network-initiated session management request message to UE_A10 to which the second congestion management is applied, the core network_B190 suppresses including information indicating a reactivation request (ReactivationdRequired). May be set.
- the processing and procedure of the UE_A10 and the core network # B190 have been described, but the processing of the core network_B190 described in this chapter is more specifically a device in the core network_B190, SMF_A230 and / or Alternatively, the processing may be executed by a control device such as the AMF_A240. Therefore, transmission and reception of the control message by core network # B190 may mean that a control device such as SMF_A230 and / or AMF_A240, which is a device in core network_B190, transmits and receives the control message.
- stop the back-off timer associated with congestion management Processing may be included, and continuing application to congestion management or continuing congestion management may include continuing to count a back-off timer associated with congestion management.
- the network-initiated session management request message and / or the network-initiated session management procedure Has described that UE_A10 is for congested S-NSSAI # A and any DNN.
- this congested S-NSSAI # A and any DNN may be the network-initiated session management request message of this chapter and / or the S-NSSAI associated with the PDU session targeted by the network-initiated session management procedure. It can be NSSAI # A and any DNN.
- the UE_A10 and the core network_B190 may execute the anchor relocation procedure of SSC mode 2 including the procedure of this chapter, switch to the anchor of the PDU session, or switch to the PDU session with a different anchor to continue the communication.
- the anchor relocation procedure of SSC mode 2 is a procedure started by the core network_B190, and the procedure accompanying the transmission of the PDU session release command executed in this procedure is one of the procedures described in this chapter. It may be.
- UE_A10 and core network_B190 may execute the anchor relocation procedure of SSC mode 3 including the procedure of this chapter and switch to the anchor of the PDU session or the PDU session with a different anchor to continue the communication.
- the anchor relocation procedure of SSC mode 3 is a procedure started by the core network _B190, and the procedure accompanying the transmission of the PDU session change command executed in this procedure is one of the procedures described in this chapter. It may be.
- the first congestion management may be a DNN-based congestion management.
- the first congestion management when the NW receives a UE-initiated session management request using DNN # A from the UE_A10, and in the NW, when a congestion for a specific DNN, for example, DNN # A is detected
- the NW may apply congestion management to UE_A10 based on a message rejecting a UE-led session management request.
- UE_A10 starts counting the back-off timer corresponding to the first congestion management received from the NW, and until the back-off timer expires, DNN # A May be set not to transmit the UE-initiated session management request using Note that using a DNN may include including DNN information in a UE-led session management request such as a PDU session establishment request message.
- first congestion management is expressed as “first congestion management for a specific DNN”.
- the NW may select the default DNN on the initiative of the NW and set it as a congestion management target even when the DNN information is not included in the session management request led by the UE.
- the first congestion management is a UE-initiated session management when the NW receives a UE-initiated session management request without using DNN information from the UE_A10 and the NW detects congestion for the default DNN. It may be a congestion management applied to the UE_A10 by the NW based on the message rejecting the request.
- UE_A10 starts counting the back-off timer corresponding to the first congestion management received from the NW, and uses the DNN until the back-off timer expires.
- the UE may be configured not to transmit the UE-initiated session management request. Not using a DNN may mean not including DNN information in a UE-led session management request such as a PDU session establishment request message.
- the first congestion management for such a default DNN is distinguished from the first congestion management for a specific DNN because it is applied based on a UE-initiated session management request that does not use DNN information. Therefore, it is expressed as "congestion management for No @ DNN".
- a UE-initiated session management request such as a PDU session establishment request message that does not use a DNN is expressed as a UE-initiated session management request that uses No @ DNN.
- a PDU session establishment request message using No @ DNN is a PDU session establishment request message not using a DNN.
- UE_A10 when changing the PLMN, counts the back-off timer associated with the first congestion management for the specific DNN, or the back-off timer associated with the first congestion management for the specific DNN. If the off timer is deactivated, UE_A10 may be configured to send a PDU session establishment request message in this new PLMN using this particular DNN. Therefore, based on this setting, UE_10 may transmit a PDU session establishment request message using this specific DNN.
- UE_A10 may continue counting until the timer expires without stopping the back-off timer that was counting. Alternatively, UE_A10 may continue to hold the deactivated back-off timer in a deactivated state.
- the first congestion management for a specific DNN may be associated with the PLMN.
- the UE starts counting by associating a back-off timer with the PLMN and the particular DNN, and if the back-off timer is not zero or deactivated, In the PLMN associated with the off-timer, the PDU session establishment using the specific DNN associated with the back-off timer is not performed. If the back-off timer is deactivated, the PLMN associated with the back-off timer uses a PDU with a specific DNN associated with the back-off timer until the terminal is turned off or the USIM is removed. Do not establish a session. When the backoff timer is zero, the PLMN associated with the backoff timer may establish a PDU session using a specific DNN associated with the backoff timer.
- UE_A10 when changing the PLMN, when performing the count of the back-off timer associated with the specific DNN and the first congestion management for the PLMN before the change, or the specific DNN and before the change
- the count of the back-off timer associated with the specific DNN and the first congestion management for the changed PLMN is further performed. If not performed, and if the back-off timer associated with the first DNM and the first congestion management for the changed PLMN has not been deactivated, UE_A10, in a new PLMN, this specific The PDU session establishment request message may be set using the DNN. Further, based on this setting, UE_10 may transmit a PDU session establishment request message using this specific DNN.
- UE_A10 when changing the PLMN, counts the back-off timer associated with the first congestion management for No @ DNN, or the back-off timer associated with the first congestion management for No @ DNN Is deactivated, UE_A10 may be configured to be able to transmit a PDU session establishment request message without using a DNN in the new PLMN. Therefore, based on this setting, UE_10 may transmit a PDU session establishment request message using this specific DNN.
- UE_A10 may continue counting until the timer expires without stopping the back-off timer that was counting. Alternatively, UE_A10 may continue to hold the deactivated back-off timer in a deactivated state.
- the first congestion management for No DNN may be associated with the PLMN.
- UE_A10 is associated with the PLMN before the change, when performing the count of the first congestion management back-off timer for No @ DNN in the change of the PLMN, or in association with the PLMN before the change.
- the count of the first congestion management back-off timer for No @ DNN associated with the changed PLMN Has not been performed, and the back-off timer of the first congestion management for No @ DNN associated with the PLMN has not been deactivated
- UE_A10 performs a PDU without a DNN in the new PLMN. It may be set so that a session establishment request message can be transmitted. Further, based on this setting, UE_10 may transmit a PDU session establishment request message without using a DNN.
- UE_A10 may perform the same processing regardless of whether the first congestion management is for a specific DNN or No ⁇ DNN.
- UE_A10 when changing the PLMN, performs the count of the first congestion management back-off timer associated with the PLMN before the change, or the first associated with the PLMN before the change.
- the back-off timer of the congestion management is deactivated, further, it does not count the first congestion management back-off timer associated with the changed PLMN, and If the associated back-off timer of the first congestion management is not deactivated, the UE_A10 is in a new PLMN, the specific DNN that was regulated by the congestion management associated with the PLMN before the change. And / or a PDU session establishment request message not using a DNN may be configured to be transmitted.
- UE_A10 may perform different processing depending on whether the first congestion management is for a specific DNN or No DNN.
- UE_A10 when changing the PLMN, counts the back-off timer associated with the first congestion management for the specific DNN, or the back-off timer associated with the first congestion management for the specific DNN.
- UE_A10 may be configured not to transmit a PDU session establishment request message in this new PLMN using this specific DNN. Therefore, based on this setting, UE_10 may be restricted from transmitting a PDU session establishment request message using this specific DNN.
- UE_A10 may continue counting until the timer expires without stopping the back-off timer that was counting. Alternatively, UE_A10 may continue to hold the deactivated back-off timer in a deactivated state.
- the first congestion management for a particular DNN may be applied in different PLMNs.
- UE_A10 when changing the PLMN, performs the count of the back-off timer associated with the first congestion management for No @ DNN, or is associated with the first congestion management for No @ DNN.
- UE_A10 may be set to be able to transmit a PDU session establishment request message without using a DNN in a new PLMN. Therefore, based on this setting, UE_10 may transmit a PDU session establishment request message using this specific DNN.
- UE_A10 may continue counting until the timer expires without stopping the back-off timer that was counting. Alternatively, UE_A10 may continue to hold the deactivated back-off timer in a deactivated state.
- the first congestion management for No DNN may be associated with the PLMN.
- the UE starts counting by associating the backoff timer with the PLMN and No DNN, and when the backoff timer is not zero or deactivate, the backoff timer PDU session establishment using the No @ DNN associated with the back-off timer is not performed in the PLMN associated with. Also, if the back-off timer is deactivated, the PDU session using the No DNN associated with the back-off timer is performed in the PLMN associated with the back-off timer until the terminal is turned off or the USIM is removed. Do not establish. When the backoff timer is zero, the PLMN associated with the backoff timer may establish a PDU session using the No DNN associated with the backoff timer.
- UE_A10 is associated with the PLMN before the change, when performing the count of the first congestion management back-off timer for No @ DNN in the change of the PLMN, or in association with the PLMN before the change.
- the count of the first congestion management back-off timer for No @ DNN associated with the changed PLMN Has not been performed, and the back-off timer of the first congestion management for No @ DNN associated with the PLMN has not been deactivated
- UE_A10 performs a PDU without a DNN in the new PLMN. It may be set so that a session establishment request message can be transmitted. Further, based on this setting, UE_10 may transmit a PDU session establishment request message without using a DNN.
- the UE_A10 is determined in advance. Although it may be set based on the set information, it may be determined based on whether or not the second PLMN after the change is an equivalent PLMN to the first PLMN before the change. For example, when the second PLMN after the change is not the equivalent PLMN to the first PLMN before the change, the same processing may be applied. Further, when the second PLMN after the change is an equivalent PLMN to the first PLMN before the change, a different process may be executed.
- the back-off timer is deactivated means that the back-off timer and / or congestion management associated with the back-off timer has transitioned to a deactivated state.
- the UE_A10 may deactivate the back-off timer and / or the congestion management associated with the back-off timer.
- the deactivated back-off timer and / or congestion management associated with the back-off timer may be associated with one to four congestion management types.
- the congestion management type associated with the deactivated back-off timer and / or the congestion management associated with the back-off timer may be similarly determined and recognized when the back-off timer value is received.
- UE_A10 the 14th identification information indicating that deactivate the congestion management associated with the back-off timer and / or back-off timer, and receives the 15th identification information from the NW,
- the back-off timer for the type of congestion management indicated by the fifteenth identification information may be deactivated.
- the application of the congestion management may be continued until the terminal is turned off or the USIM is taken out. Furthermore, the process regulated at that time may be the same as the process regulated when the back-off timer is counting according to each type of congestion management.
- the processing of UE_A10 and NW associated with the change of the PLMN described so far has been described with respect to the first congestion management, and / or the backoff timer for the first congestion management, but the second congestion management, Similar processing may be performed for the third congestion management and the fourth congestion management.
- the PDU session establishment request message whose transmission is restricted or permitted may be a message corresponding to each type.
- the congestion management and / or the backoff timer associated with the congestion management may be associated with the PLMN regardless of the type of the congestion management.
- an arbitrary congestion management and / or a back-off timer associated with the congestion management may be set to be associated with the PLMN.
- the backoff timer associated with the congestion management and / or the congestion management is set to be associated with the PLMN.
- the backoff timer associated with the congestion management and / or the congestion management may be associated with the PLMN.
- the first congestion management for a particular DNN may not be associated with a PLMN. Note that the processing when each congestion management is associated with the PLMN and / or the processing related to the back-off timer corresponding to each congestion management is the above-described processing for the first congestion management associated with the PLMN.
- first congestion management in the description of the processing related to the back-off timer corresponding to the first congestion management associated with the PLMN is replaced with second to fourth various congestion managements It may be replaced.
- the processing when each congestion management is not associated with the PLMN, and / or the processing relating to the back-off timer corresponding to each congestion management is the first congestion that is not associated with the PLMN.
- the first congestion management in the description of the processing for management and / or the processing related to the back-off timer corresponding to the first congestion management not associated with the PLMN May be replaced by the congestion management.
- the PDU session establishment request message whose transmission is restricted or permitted may be a message corresponding to each type.
- the NW expresses to transmit to UE_A10
- the AMF or SMF transmits to UE_A10
- UE_A10 is AMF
- the NW expresses that it receives from UE_A10
- the AMF or SMF receives from the UE_A10
- the UE_A10 expresses that it receives from the NW
- the UE_A10 receives from the AMF or SMF. It may be.
- the PDU session establishment rejection message (S1122) received by UE_A includes the fifteenth identification information and / or the fourteenth identification information and / or the eleventh identification information. Regarding when is included.
- the fifteenth identification information is information indicating one or more reason values (Cause Value) for which the procedure in which the NW notifies the UE is rejected, for reasons other than the application of congestion management. .
- the fourteenth identification information is information indicating a value of the back-off timer.
- the eleventh identification information is information indicating re-attempt (Re-attempt) information.
- the back-off timer may be the first timer used in the third congestion management described in the present embodiment, or is not limited to this as long as the timer of the mobile communication system can be recognized by the UE. Note that the term “SM back-off timer” is used to distinguish the above-mentioned first timer and back-off timer.
- DNN information When DNN information is not included in the PDU session establishment procedure, it is expressed as “no” DNN ”to distinguish it from control signal management when DNN information is included.
- S-NSSAI information when S-NSSAI information is not included in the PDU session establishment procedure, it is expressed as "no @ S-NSSAI" to distinguish it from control signal management when S-NSSAI information is included.
- a fourth process is performed (S1124). You may.
- a PDU session establishment rejection message (S1122) may be transmitted to UE_A10 with an off timer.
- the rejection reason value indicated by the fifteenth identification information is Insufficient resource and / or Insufficient resource for for specific slice and DNN and / or Insufficient resource for specific specific slice and / or user authentication failure or authorization failure and / or out of LADN service area, and / or PDU session type IPv4 only allowed, and / or PDU session type IPv6 only allowed, and / or other than PDU session does not exist, UE_A10 is based on the received SM back-off timer value. May be performed.
- UE_A10 may implement a first procedure example described below when the SM back-off timer value is not zero or invalid.
- UE_A10 may start the SM back-off timer for PLMN and / or DNN and / or S-NSSAI, or start the SM back-off timer for PLMN and / or no DNN and / or S-NSSAI. May start the SM back-off timer for PLMN and / or DNN and / or no S-NSSAI, or may start the SM for PLMN and / or no DNN and / or no S-NSSAI. A back-off timer may be started.
- UE_A10 may further suppress transmission of the PDU session establishment request message (1011) based on the value of the SM back-off timer described above.
- UE_A10 until the SM back-off timer for PLMN and / or DNN and / or S-NSSAI expires, or terminal power on / off, or until the removal and insertion of the USIM (Universal Subscriber Identity Module) Reconnection using another PDU session establishment request message for the DNN and S-NSSAI parameters transmitted in the PDU session establishment request message (1011) may be suppressed.
- USIM Universal Subscriber Identity Module
- UE_A10 is a PDU session until the SM back-off timer for PLMN and / or no DNN and / or S-NSSAI expires, or until the terminal is turned on / off, or the USIM (Universal Subscriber Identity Module) is removed. Reconnection using another PDU session establishment request message for the parameters of the no DNN and the S-NSSAI transmitted in the establishment request message (1011) may be suppressed.
- the USIM Universal Subscriber Identity Module
- UE_A10 is a PDU session until the SM back-off timer for PLMN and / or DNN and / or no S-NSSAI expires, or until the terminal is turned on / off, or until the USIM (Universal Subscriber Identity Module) is removed. Reconnection using another PDU session establishment request message for the DNN and the no S-NSSAI parameter transmitted in the establishment request message (1011) may be suppressed.
- USIM Universal Subscriber Identity Module
- UE_A10 is a PDU until the SM back-off timer for the PLMN and / or no DNN and / or no S-NSSAI expires, or until the terminal is turned on / off, or the USIM (Universal Subscriber Identity Module) is removed. Reconnection using another PDU session establishment request message for the parameters of the no DNN and the no S-NSSAI transmitted in the session establishment request message (1011) may be suppressed.
- UE_A10 may execute a second procedure example different from the first procedure example when the SM back-off timer value indicates invalid.
- UE_A10 is another PDU session establishment request message for the parameters of the DNN and S-NSSAI transmitted in the PDU session establishment request message (1011) until the terminal is turned on / off or the USIM (Universal Subscriber Identity Module) is removed. May be suppressed.
- USIM Universal Subscriber Identity Module
- UE_A10 is another PDU session targeting the no DNN and S-NSSAI parameters transmitted in the PDU session establishment request message (1011) until the terminal power is turned on / off or the USIM (Universal Subscriber Identity Module) is inserted and removed. Reconnection using the establishment request message may be suppressed.
- USIM Universal Subscriber Identity Module
- UE_A10 is another PDU session for the parameters of the DNN and the noSSS-NSSAI transmitted in the PDU session establishment request message (1011) until the terminal power is turned on / off or the USIM (Universal Subscriber Identity Module) is removed. Reconnection using the establishment request message may be suppressed.
- USIM Universal Subscriber Identity Module
- UE_A10 is another PDU that targets the no DNN and no S-NSSAI parameters transmitted in the PDU session establishment request message (1011) until the terminal is turned on / off, or the USIM (Universal Subscriber Identity Module) is removed. Reconnection using the session establishment request message may be suppressed.
- USIM Universal Subscriber Identity Module
- UE_A10 may execute a third procedure example different from the first and second procedure examples.
- UE_A10 stops when the DNN transmitted in the PDU session establishment request message (1011) and the SM back-off timer associated with S-NSSAI are running, and transmits the DNN transmitted in the PDU session establishment request message (1011).
- another PDU session establishment request message may be transmitted using S-NSSAI.
- UE_A10 is stopped when the SM back-off timer associated with the no DNN and the S-NSSAI transmitted in the PDU session establishment request message (1011) is activated, and the UE_A10 transmits the PDU session establishment request message (1011).
- Another PDU session establishment request message may be transmitted using the transmitted no DNN and S-NSSAI.
- UE_A10 stops when the SM back-off timer associated with the DNN and the no S-NSSAI transmitted in the PDU session establishment request message (1011) has been activated, and receives a PDU session establishment request message (1011).
- Another PDU session establishment request message may be transmitted using the transmitted DNN and no S-NSSAI.
- UE_A10 is stopped when the SM back-off timer associated with the no @ DNN and no @ S-NSSAI transmitted in the PDU session establishment request message (1011) is activated, and the PDU session establishment request message (1011) Another PDU session establishment request message may be transmitted using the no DNN and the no S-NSSAI transmitted in the above.
- UE_A10 does not stop the SM back-off timer that is running when the PLMN is changed or the N1 mode is changed to the S1 mode. This is because, for example, when returning to the original PLMN from the PLMN change destination due to PLMN change, the back-off timer started in the original PLMN continues to be started, and the control signal management applied in the original PLMN is continued This is to apply.
- UE_A10 may execute the fourth procedure example when the SM back-off timer started before the PLMN change performs the PLMN change during the start.
- the PLMN before the PLMN change is referred to as an original PLMN.
- the UE_A10 is the PLMN change destination, if the SM back-off timer for the S-NSSAI and DNN started in the original PLMN has not been started, the S- A PDU session establishment request message using the same S-NSSAI and DNN as the NSSAI and DNN may be transmitted.
- UE_A10 is a PLMN change destination, if the SM back-off timer for the S-NSSAI and no DNN started in the original PLMN has not been started, it is associated with the SM back-off timer started in the original PLMN.
- a PDU session establishment request message using the same S-NSSAI and no @ DNN as the existing S-NSSAI and no @ DNN may be transmitted.
- UE_A10 is a PLMN change destination, if the SM back-off timer for the no S-NSSAI and the DNN started in the original PLMN has not been started, it is associated with the SM back-off timer started in the original PLMN.
- a PDU session establishment request message using the same no S-NSSAI and DNN as the no S-NSSAI and DNN may be transmitted.
- UE_A10 is associated with the SM back-off timer started in the original PLMN when the SM back-off timer for the no ⁇ ⁇ ⁇ S-NSSAI and no DNN started in the original PLMN is not started in the PLMN change destination.
- a PDU session establishment request message using the same no S-NSSAI and no DNN as the no ⁇ ⁇ ⁇ S-NSSAI and no DNN may be transmitted.
- UE_A10 is a case where the reason value indicated by the fifteenth identification information is user authentication or authorization failed or PDU session type IPv4 Alternatively, a fifth procedure example different from the first to third procedure examples may be performed.
- the UE_A10 changes the PDU session type used in the PDU session establishment request message (1011), or turns on / off the terminal, or inserts or removes the USIM (Universal Subscriber Identity Module), until the PDU session establishment request message is removed.
- the procedure may not automatically transmit the reconnection using another PDU session establishment request message for the DNN and the S-NSSAI parameter transmitted in (1011).
- UE_A10 also changes the PDU session type used in the PDU session establishment request message (1011), turns on / off the terminal, or inserts or removes the USIM (Universal Subscriber Identity Module) (1011). May be a procedure that does not automatically transmit a reconnection using another PDU session establishment request message for the no DNN and the S-NSSAI parameter transmitted in the above.
- USIM Universal Subscriber Identity Module
- UE_A10 also changes the PDU session type used in the PDU session establishment request message (1011), turns on / off the terminal, or inserts or removes the USIM (Universal Subscriber Identity Module) (1011). May be a procedure that does not automatically transmit a reconnection using another PDU session establishment request message for the DNN and the no S-NSSAI parameter transmitted in the above.
- USIM Universal Subscriber Identity Module
- UE_A10 also changes the PDU session type used in the PDU session establishment request message (1011), turns on / off the terminal, or inserts or removes the USIM (Universal Subscriber Identity Module) (1011). May be a procedure for not automatically transmitting a reconnection using another PDU session establishment request message for the no DNN and the no S-NSSAI parameter transmitted in the above.
- USIM Universal Subscriber Identity Module
- UE_A10 is different from the first to third and fifth procedure examples when the reason value indicated by the fifteenth identification information is PDU ⁇ session ⁇ does ⁇ not ⁇ exist.
- the procedure example 6 may be performed.
- UE_A10 may transmit an initial (“initial @ request”) PDU session establishment request message for the DNN and S-NSSAI parameters transmitted in the PDU session establishment request message (1011).
- UE_A10 may also transmit an initial ("initial @ request") PDU session establishment request message for the no @ DNN and the S-NSSAI parameter transmitted in the PDU session establishment request message (1011).
- UE_A10 may also transmit an initial ("initial @ request") PDU session establishment request message for the DNN and the no @ S-NSSAI parameter transmitted in the PDU session establishment request message (1011).
- UE_A10 may also transmit an initial ("initial request") PDU session establishment request message for the no @ DNN and the no @ S-NSSAI parameter transmitted in the PDU session establishment request message (1011).
- UE_A10 has the reason value indicated by the fifteenth identification information is user authentication authentication or authorization In the case of allowed and / or PDU ⁇ session ⁇ does ⁇ not ⁇ exist ⁇ , a seventh procedure example different from the first to third, fifth, and sixth procedure examples may be performed.
- UE_A10 may ignore the received SM back-off timer.
- another PDU session establishment request message may be transmitted based on the re-attempt information indicated by the eleventh identification information. Specifically, when the connection with the equal PLMN is permitted by the re-attempt information, UE_A10 transmits another PDU session targeting the DNN and the S-NSSAI parameter transmitted in the PDU session establishment request message (1011). The establishment request message may be transmitted by the equivalent PLMN.
- UE_A10 transmits another PDU session establishment request for the no DNN and the S-NSSAI parameter transmitted in the PDU session establishment request message (1011).
- the message may be transmitted by the equivalent PLMN.
- UE_A10 transmits another PDU session establishment request for the DNN and the no S-NSSAI parameter transmitted in the PDU session establishment request message (1011).
- the message may be transmitted by the equivalent PLMN.
- UE_A10 establishes another PDU session for the no DNN and the no S-NSSAI parameter transmitted in the PDU session establishment request message (1011).
- the request message may be transmitted by the equivalent PLMN.
- UE_A10 may execute processing based on the reception of the PDU session establishment rejection message.
- the process based on the reception of the PDU session establishment rejection message described above may be, in other words, a process example described below. Note that this processing example may be processing to be executed when the timer value is included in the PDU session establishment rejection message.
- the 5GSM reason value included in the PDU session establishment rejection message indicates other than the reason value related to congestion management, based on the received 5GSM reason value, using the received timer value, PLMN, DNN and S -A back-off timer for the NSSAI combination may be started.
- DNN and S-NSSAI may be those indicated by UE_A10.
- UE_A10 may be the DNN and S-NSSAI included in the PDU session establishment request message.
- the PDU session establishment rejection message in the present process may be a response message to the PDU session establishment request message.
- the reason value related to congestion management is a reason value indicating that resources are insufficient (Insufficient @ resources) and / or that resources for a specific slice are insufficient (Insufficient @ resources @ for @ specific @ slice).
- the reason value may be an indication value and / or a reason value indicating that resources for a specific slice and DNN are insufficient (Insufficient resources ⁇ for specific ⁇ slice ⁇ and ⁇ DNN).
- UE_A10 if the 5GSM reason value included in the PDU session establishment rejection message is different from the reason value included in the following reason value group, using the received timer value , A back-off timer for the combination of PLMN, DNN and S-NSSAI may be started.
- the reason value group described above is a reason value related to the congestion management described above, and / or userauthenticationorauthorizationfailed, and / or outofLADNservicearea, and / or PDUsessiontypeIPv4onlyallowed, and / or Alternatively, it may be PDU session type IPv6 only allowed and / or PDU session does not exist.
- UE_A10 when the 5GSM reason value included in the PDU session establishment rejection message indicates Request rejected, unspecified, using the received timer value, a back-off timer for the combination of PLMN, DNN, and S-NSSAI. You may start.
- the process executed by UE_A10 during the counting of the back-off timer described above may be the process already described in this chapter.
- the program that operates on the device according to the present invention may be a program that controls a Central Processing Unit (CPU) and the like to cause a computer to function so as to realize the functions of the embodiment according to the present invention.
- the program or information handled by the program is temporarily stored in a volatile memory such as a Random Access Memory (RAM), a nonvolatile memory such as a flash memory, a Hard Disk Drive (HDD), or another storage device system.
- RAM Random Access Memory
- HDD Hard Disk Drive
- a program for realizing the functions of the embodiment according to the present invention may be recorded on a computer-readable recording medium.
- the program may be realized by causing a computer system to read and execute the program recorded on the recording medium.
- the “computer system” is a computer system built in the device, and includes an operating system and hardware such as peripheral devices.
- the “computer-readable recording medium” is a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a medium for dynamically storing a program for a short time, or another recording medium readable by a computer. Is also good.
- Each functional block or various features of the device used in the above-described embodiment may be implemented or executed by an electric circuit, for example, an integrated circuit or a plurality of integrated circuits.
- Electrical circuits designed to perform the functions described herein may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other Logic devices, discrete gate or transistor logic, discrete hardware components, or a combination thereof.
- a general purpose processor may be a microprocessor, or may be a conventional processor, controller, microcontroller, or state machine.
- the above-described electric circuit may be constituted by a digital circuit or may be constituted by an analog circuit.
- one or more aspects of the present invention can use a new integrated circuit based on the technology.
- the present invention is not limited to the above embodiment.
- an example of the device is described, but the present invention is not limited to this, and stationary or non-movable electronic devices installed indoors and outdoors, for example, AV devices, kitchen devices It can be applied to terminal devices or communication devices such as cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other living equipment.
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Abstract
Description
本実施形態における移動通信システムの概略について、図1、図2、図3、図4を用いて説明する。図2は、図1の移動通信システムのうち、アクセスネットワークの詳細を記載した図である。図3は、図1の移動通信システムのうち、主にコアネットワーク_A90の詳細を記載した図である。図4は、図1の移動通信システムのうち、主にコアネットワーク_B190の詳細を記載した図である。図1に示すように、本実施形態における移動通信システム1は、端末装置(ユーザ装置、移動端末装置とも称する)UE(User Equipment)_A10、アクセスネットワーク(AN; Access Network)_A、アクセスネットワーク_B、コアネットワーク(CN; Core Network)_A90、コアネットワーク_B190、パケットデータネットワーク(PDN; Packet Data Network)_A6、及びデータネットワーク(DN; Data Network)_A5により構成されている。尚、アクセスネットワーク_Aとコアネットワーク_A90の組み合わせをEPS(Evolved Packet System;4G移動通信システム)と称してもよいし、アクセスネットワーク_Bとコアネットワーク_B190とUE_A10の組み合わせを5GS(5G System;5G移動通信システム)と称してもよいし、5GSとEPSの構成はこれらに限らなくてもよい。尚、簡単化のため、コアネットワーク_A90、コアネットワークB又はこれらの組み合わせをコアネットワークとも称することがあり、アクセスネットワーク_A、アクセスネットワーク_B又はこれらの組み合わせをアクセスネットワーク又は無線アクセスネットワークとも称することがあり、DN_A5、PDN_A6又はこれらの組み合わせをDNとも称することがある。
以下、各装置の構成について説明する。尚、下記各装置及び各装置の各部の機能の一部又は全部は、物理的なハードウェア上で動作するものでもよいし、汎用的なハードウェア上に仮想的に構成された論理的なハードウェア上で動作するものでもよい。
まず、UE_A10の装置構成例を、図5に示す。図5に示すように、UE_A10は、制御部_A500、送受信部_A520、記憶部_A540で構成される。送受信部_A520及び記憶部_A540は、制御部_A500とバスを介して接続されている。また、送受信部_A520には、外部アンテナ410が接続されている。
次に、eNB_A45及びNR node_A122の装置構成例を、図6に示す。図6に示すように、eNB_A45及びNR node_A122は、制御部_B600、ネットワーク接続部_B620、送受信部_B630、記憶部_B640で構成されている。ネットワーク接続部_B620、送受信部_B630及び記憶部_B640は、制御部_B600とバスを介して接続されている。また、送受信部_B630には、外部アンテナ510が接続されている。
次に、MME_A40又はAMF_A240の装置構成例を、図7に示す。図7に示すように、MME_A40又はAMF_A240は、制御部_C700、ネットワーク接続部_C720、記憶部_C740で構成されている。ネットワーク接続部_C720及び記憶部_C740は、制御部_C700とバスを介して接続されている。また、記憶部_C740は、コンテキスト642を記憶している。
次に、SMF_A230の装置構成例を、図8に示す。図8に示すように、SMF_A230は、それぞれ、制御部_D800、ネットワーク接続部_D820、記憶部_D840で構成されている。ネットワーク接続部_D820及び記憶部_D840は、制御部_D800とバスを介して接続されている。また、記憶部_D840は、コンテキスト742を記憶している。
次に、PGW_A30又はUPF_A235の装置構成例を、図8に示す。図8に示すように、PGW_A30又はUPF_A235は、それぞれ、制御部_D800、ネットワーク接続部_D820、記憶部_D840で構成されている。ネットワーク接続部_D820及び記憶部_D840は、制御部_D800とバスを介して接続されている。また、記憶部_D840は、コンテキスト742を記憶している。
次に、上記各装置の記憶部で記憶される各情報について、説明する。
次に、本実施形態における初期手続きの詳細手順を説明する前に、重複説明を避ける為、本実施形態で特有の用語や、各手続きに用いる主要な識別情報を予め説明する。
まず、登録手続きの概要について説明する。登録手続きは、UE_A10が主導してネットワーク(アクセスネットワーク、及び/又はコアネットワーク_B190、及び/又はDN_A5)へ登録する為の手続きである。UE_A10は、ネットワークに登録していない状態であれば、電源投入時等の任意のタイミングで本手続きを実行することができる。言い換えると、UE_A10は、非登録状態(RM-DEREGISTERED state)であれば任意のタイミングで本手続きを開始してもよい。また、各装置は、登録手続きの完了に基づいて、登録状態(RM-REGISTERED state)に遷移してもよい。
図10を用いて、登録手続きを実行する手順の例を説明する。本章では、本手続きとは登録手続きを指す。以下、本手続きの各ステップについて説明する。
次に、DN_A5に対するPDUセッションを確立するために行うPDUセッション確立手続きの概要について説明する。以下、PDUセッション確立手続きは、本手続きとも称する。本手続きは、各装置がPDUセッションを確立する為の手続きである。尚、各装置は、本手続きを、登録手続きを完了した状態で実行してもよいし、登録手続きの中で実行してもよい。また、各装置は、登録状態で本手続きを開始してもよいし、登録手続き後の任意のタイミングで本手続きを開始してもよい。また、各装置は、PDUセッション確立手続きの完了に基づいて、PDUセッションを確立してもよい。さらに、各装置は、本手続きを複数回実行することで、複数のPDUセッションを確立してもよい。
図11を用いて、PDUセッション確立手続きを実行する手順の例を説明する。以下、本手続きの各ステップについて説明する。まず、UE_A10は、アクセスネットワーク_Bを介して、コアネットワーク_BにPDUセッション確立要求(PDU Session Establishment Request)メッセージを送信することにより(S1100)、PDUセッション確立手続きを開始する。
次に、ネットワーク主導のセッションマネジメント手続きの概要について説明する。以下、ネットワーク主導のセッションマネジメント手続きは本手続きとも称する。本手続きは、確立されたPDUセッションに対してネットワークが主導して実行するセッションマネジメントの為の手続きである。尚、本手続きは、前述の登録手続き及び/又はPDUセッション確立手続きが完了し、各装置が第1の状態に遷移した後の任意のタイミングで実行してもよい。また、各装置は、本手続き中に輻輳管理を停止又は変更する為の識別情報を含んだメッセージを送受信してもよいし、本手続きの完了に基づいてネットワークが指示する新たな輻輳管理に基づく挙動を開始してもよい。
図12を用いて、ネットワーク主導のセッションマネジメント手続きの例を説明する。本章では、本手続きとはネットワーク主導のセッションマネジメント手続きを指す。以下、本手続きの各ステップについて説明する。
1.3.3.1章で説明した第1のネットワーク主導のセッションマネジメント手続き例では、UE_A10に対して適用されている輻輳管理が、第1から第4の輻輳管理のどの輻輳管理であるかに関わらず、手続きの中で輻輳管理を停止する例を説明した。
これまで本実施形態において、第4の処理例の説明をしてきたが、これまでの説明に限らず、第4の処理では以下のような処理が行われても良い。
本発明に関わる装置で動作するプログラムは、本発明に関わる実施形態の機能を実現するように、Central Processing Unit(CPU)等を制御してコンピュータを機能させるプログラムであっても良い。プログラムあるいはプログラムによって取り扱われる情報は、一時的にRandom Access Memory(RAM)等の揮発性メモリあるいはフラッシュメモリ等の不揮発性メモリやHard Disk Drive(HDD)、あるいはその他の記憶装置システムに格納される。
Claims (4)
- UE(User Equipment;端末装置)であって、
送信部を備え、
前記送信部は、受信した5GSM理由値がPDU session does not existを示す場合、初期のPDUセッション確立要求メッセージの送信行う、
ことを特徴とするUE。 - UEであって、
受信部と制御部を備え、
前記受信部は、Request rejected, unspecifiedを示す5GSM理由値とタイマーを受信した場合、
前記制御部は、前記5GSM理由値が輻輳管理に関連する理由値以外を示す場合、前記5GSM理由値に基づいて、PLMN及びDNN及びS-NSSAIの組み合わせに対するバックオフタイマーを起動する、
ことを特徴とするUE。 - UEであって、
受信部と制御部を備え、
前記受信部は、5GSM理由値とタイマーを受信した場合、
前記制御部は、前記5GSM理由値が輻輳管理に関連する理由値以外を示す場合、前記5GSM理由値に基づいて、PLMN及びDNN及びS-NSSAIの組み合わせに対するバックオフタイマーを起動する、
ことを特徴とするUE。 - UEであって、
制御部を備え、
前記制御部は、受信した5GSM理由値が輻輳管理以外の理由値を示す場合、受信したバックオフタイマーを無視する、
ことを特徴とするUE。
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US17/282,168 US12022547B2 (en) | 2018-10-05 | 2019-10-03 | User equipment |
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EP (1) | EP3863369B1 (ja) |
JP (1) | JP2020061609A (ja) |
CN (1) | CN113261383B (ja) |
AU (1) | AU2019354342A1 (ja) |
WO (1) | WO2020071502A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2023024241A (ja) * | 2021-08-03 | 2023-02-16 | 緯創資通股▲ふん▼有限公司 | 常時接続プロトコルデータユニット (pdu)セッションの信号増強の装置と方法。 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020061609A (ja) * | 2018-10-05 | 2020-04-16 | シャープ株式会社 | Ue、制御装置、及び通信制御方法 |
US11503667B2 (en) * | 2019-10-08 | 2022-11-15 | Mediatek Inc. | Enhancement for multi-access PDU session release |
CN119450559A (zh) * | 2019-11-07 | 2025-02-14 | 华为技术有限公司 | 支持分析生成的网络实体 |
WO2021123892A1 (en) * | 2019-12-19 | 2021-06-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Slice and/or subscriber identification module device lock |
US20210274570A1 (en) * | 2020-02-28 | 2021-09-02 | Qualcomm Incorporated | Apparatus and method of wireless communication based on a back-off timer |
WO2021235221A1 (ja) * | 2020-05-21 | 2021-11-25 | シャープ株式会社 | UE(User Equipment)、及び通信制御方法 |
US11889320B2 (en) * | 2021-02-25 | 2024-01-30 | David Clark Company Incorporated | System and method for hosting and transitioning to a wireless network |
US11882538B1 (en) * | 2021-04-08 | 2024-01-23 | T-Mobile Innovations Llc | Wireless user equipment (UE) registration with networking data responsive to external control |
GB202111878D0 (en) * | 2021-08-18 | 2021-09-29 | Samsung Electronics Co Ltd | Control panel data transmission |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012148210A2 (en) * | 2011-04-29 | 2012-11-01 | Lg Electronics Inc. | Method for processing data associated with session management and mobility management |
CN102868634B (zh) * | 2011-07-04 | 2015-07-08 | 华为终端有限公司 | 拥塞控制的方法、装置及用户设备 |
CN102595556B (zh) * | 2012-02-29 | 2015-01-14 | 电信科学技术研究院 | 一种会话管理请求消息的传输控制方法和设备 |
KR101691761B1 (ko) | 2012-12-19 | 2016-12-30 | 엘지전자 주식회사 | 다중 액세스 네트워크를 지원하는 무선 통신 시스템에서 통신 방법 및 이를 지원하는 장치 |
CN114449603B (zh) | 2012-12-24 | 2024-06-07 | 北京三星通信技术研究有限公司 | 无线通信系统中的基站及由其执行的方法 |
US10999779B2 (en) | 2017-01-15 | 2021-05-04 | Lg Electronics Inc. | Method for controlling congestion when congestion occurs in network |
US10397892B2 (en) | 2017-02-06 | 2019-08-27 | Huawei Technologies Co., Ltd. | Network registration and network slice selection system and method |
KR102327639B1 (ko) * | 2017-03-10 | 2021-11-17 | 삼성전자 주식회사 | Mobile Initiated Communication Only mode 단말의 연결을 유지시키는 방법 |
SG11201811730TA (en) * | 2017-04-19 | 2019-01-30 | Lg Electronics Inc | Method for processing pdu session establishment procedure and amf node |
WO2019135560A1 (ko) * | 2018-01-04 | 2019-07-11 | 엘지전자 주식회사 | Pdu 세션 수립 절차를 수행하는 방법, 사용자 장치 및 네트워크 노드 |
WO2019160278A1 (ko) * | 2018-02-13 | 2019-08-22 | 엘지전자 주식회사 | Ma pdu 세션의 수립을 처리하는 방안 그리고 amf 노드 및 smf 노드 |
US10986528B2 (en) * | 2018-02-15 | 2021-04-20 | Huawei Technologies Co., Ltd. | Tracking QoS violated events |
US10980084B2 (en) * | 2018-02-15 | 2021-04-13 | Huawei Technologies Co., Ltd. | Supporting multiple QOS flows for unstructured PDU sessions in wireless system using non-standardized application information |
WO2019216526A1 (ko) * | 2018-05-08 | 2019-11-14 | 엘지전자 주식회사 | 5gs에서 액세스 제어를 수행하는 방법 및 사용자 장치 |
US11304092B2 (en) * | 2018-09-12 | 2022-04-12 | Ofinno, Llc | Session packet duplication control |
US11399304B2 (en) * | 2018-09-28 | 2022-07-26 | Ofinno, Llc | Packet duplication by core network |
JP2020061609A (ja) * | 2018-10-05 | 2020-04-16 | シャープ株式会社 | Ue、制御装置、及び通信制御方法 |
-
2018
- 2018-10-05 JP JP2018189949A patent/JP2020061609A/ja active Pending
-
2019
- 2019-10-03 CN CN201980065206.3A patent/CN113261383B/zh active Active
- 2019-10-03 WO PCT/JP2019/039184 patent/WO2020071502A1/ja unknown
- 2019-10-03 US US17/282,168 patent/US12022547B2/en active Active
- 2019-10-03 EP EP19869794.8A patent/EP3863369B1/en active Active
- 2019-10-03 AU AU2019354342A patent/AU2019354342A1/en not_active Abandoned
Non-Patent Citations (5)
Title |
---|
3GPP TS 23.501 |
3GPP TS 23.502 |
ANONYMOUS: "3GPP TS 24.501", 3GPP TS 24.501 VERSION 15.1.0 RELEASE 15, no. V15.1.0, 1 August 2018 (2018-08-01), pages 1 - 406, XP055709935 * |
ANONYMOUS: "3rd Generation Partnership Project; Technical Specification Group Core Network and Terminals; 5G System - Phase 1; CT WG1 Aspects (Release 15)", 3GPP STANDARD; TECHNICAL REPORT; 3GPP TR 24.890, no. V15.1.0, 29 March 2018 (2018-03-29), pages 1 - 310, XP051450684 * |
See also references of EP3863369A4 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2023024241A (ja) * | 2021-08-03 | 2023-02-16 | 緯創資通股▲ふん▼有限公司 | 常時接続プロトコルデータユニット (pdu)セッションの信号増強の装置と方法。 |
JP7296491B2 (ja) | 2021-08-03 | 2023-06-22 | 緯創資通股▲ふん▼有限公司 | 常時接続プロトコルデータユニット (pdu)セッションの信号増強の装置と方法。 |
US11848993B2 (en) | 2021-08-03 | 2023-12-19 | Wistron Corp. | Apparatuses and methods of signaling enhancement for always-on protocol data unit (PDU) session |
Also Published As
Publication number | Publication date |
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EP3863369B1 (en) | 2023-11-29 |
CN113261383A (zh) | 2021-08-13 |
CN113261383B (zh) | 2024-04-05 |
EP3863369A4 (en) | 2022-07-06 |
JP2020061609A (ja) | 2020-04-16 |
US20220015174A1 (en) | 2022-01-13 |
AU2019354342A1 (en) | 2021-05-27 |
US12022547B2 (en) | 2024-06-25 |
EP3863369A1 (en) | 2021-08-11 |
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