WO2019098392A1 - Ue及びueの通信制御方法 - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
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- H—ELECTRICITY
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
- H04W48/06—Access restriction performed under specific conditions based on traffic conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W48/18—Selecting a network or a communication service
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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- H04W76/10—Connection setup
- H04W76/18—Management of setup rejection or failure
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
- H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
Definitions
- the present invention relates to a UE and a communication control method of the UE.
- This application is based on Japanese Patent Application No. 2017-222794 filed in Japan on Nov. 20, 2017 and Japanese Patent Application No. 2017-228771 filed in Japan on Nov. 29, 2017 in priority to the benefit of priority. It is claimed that, by reference to it, the entire content is included in the present application.
- 3GPP The 3rd Generation Partnership Project (3GPP), which conducts standardization activities for mobile communication systems in recent years, is examining System Architecture Evolution (SAE), which is a system architecture of Long Term Evolution (LTE).
- SAE System Architecture Evolution
- LTE Long Term Evolution
- 3GPP is carrying out specification of EPS (Evolved Packet System) as a communication system which implement
- the core network that constitutes the EPS is called EPC (Evolved Packet Core).
- 5G Fifth Generation
- 5GS 5th Generation
- 5GS 5th Generation
- technical issues for connecting various terminals to cellular networks are extracted, and solutions are specified.
- optimization and diversification of communication procedures to support continuous mobile communication services and system architecture tailored to optimization and diversification of communication procedures Optimization is also mentioned as a requirement.
- Non-Patent Document 1 In addition to a mechanism for providing a function corresponding to congestion management in EPS, congestion management in a network slice (Network Slice) is being studied (see Non-Patent Document 1 and Non-Patent Document 2).
- 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 realizing management processing such as congestion management for each network slice.
- the UE User Equipment
- the UE is a UE provided with a control unit, and the first timer is started for congestion management based on DNN for each Data Network Name (DNN), and the second timer A timer is executed for congestion management based on S-NSSAI for each single network slice selection assistance information (S-NSSAI) and DNN, and the first timer and the second timer are provided by the UE.
- the control unit is configured to simultaneously execute the first timer and the second timer.
- the first timer is started for congestion management based on DNN for each data network name (DNN), and the second timer is S-NSSAI. (Single Network Slice Selection Assistance information) and DNN are executed for congestion management based on S-NSSAI, wherein the first timer and the second timer are the same DNN provided by the UE
- the UE is associated, and the UE simultaneously executes the first timer and the second timer.
- the terminal device configuring the 5GS or the device in the core network may perform management processing such as congestion management for each network slice and / or DNN or APN by terminal device initiative or network initiative. it can.
- FIG. 1 is a diagram schematically illustrating a mobile communication system. It is a figure which shows one example, such as a structure of the access network in a mobile communication system. It is a figure which shows one example, such as a structure of core network_B in a mobile communication system. It is a figure which shows the apparatus structure of UE. It is a figure which shows the apparatus structure of eNB / NR node. It is a figure which shows the apparatus structure of AMF / MME. It is a figure which shows the apparatus structure of SMF / UPF. It is a figure which shows an initial procedure. It is a figure which shows a registration procedure. FIG. 7 is a diagram illustrating a PDU session establishment procedure. It is a figure which shows one example, such as a structure of core network_A in a mobile communication system.
- FIG. 2 is a diagram describing the details of the access network in the mobile communication system of FIG.
- FIG. 3 is a diagram mainly describing details of core network B 190 in the mobile communication system of FIG.
- FIG. 11 is a diagram mainly describing details of core network A 90 in the mobile communication system of FIG. 1. As shown in FIG. 1, FIG. 2, FIG. 3, and FIG. FIG. 2 is a diagram describing the details of the access network in the mobile communication system of FIG.
- FIG. 3 is a diagram mainly describing details of core network B 190 in the mobile communication system of FIG.
- FIG. 11 is a diagram mainly describing details of core network A 90 in the mobile communication system of FIG. 1.
- FIG. 1 is a diagram describing the details of the access network in the mobile communication system of FIG.
- FIG. 3 is a diagram mainly describing details of core network B 190 in the mobile communication system of FIG.
- FIG. 11 is a diagram mainly describing details of core network A 90 in the mobile communication system of FIG. 1.
- the mobile communication system 1 in this 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, an access network B A core network (CN; Core Network) A90, a core network B190, a packet data network (PDN; Packet Data Network) A6, and a data network (DN) Data Network A5.
- UE User Equipment
- a combination of the access network A and the core network A may be referred to as an EPS (Evolved Packet System; 4G mobile communication system), or a combination of the access network B, the core network B, and the UE A10 is 5GS (5G System) 5G mobile communication system), and the configuration of 5GS and EPS may not be limited to these.
- core network A, core network B, or a combination thereof may be referred to as core network
- access network A, access network B, or a combination thereof may also be referred to as access network or radio access network.
- DN_A5, PDN_A6 or a combination thereof may also be referred to as DN.
- UE_A10 can connect to network services via 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) Device may be used.
- 3GPP access also referred to as 3GPP access or 3GPP access network
- non-3GPP access also referred to as non-3GPP access or non-3GPP access network
- UE_A10 may be provided with UICC (Universal Integrated Circuit Card) and eUICC (Embedded UICC).
- UE_A 10 may be a terminal device capable of wireless connection, 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
- the UE_A 10 can be connected to an access network and / or a core network. Also, UE_A 10 can be connected to DN_A and / or PDN_A via an access network and / or core network. The UE_A 10 transmits / receives user data to / 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 PDN connection). ). Furthermore, communication of user data is not limited to IP (Internet Protocol) communication (IPv4 or IPv6), and may be, for example, non-IP communication in EPS, or Ethernet (registered trademark) communication or Unstructured communication in 5GS. It may be.
- IP Internet Protocol
- the IP communication is communication of data using IP, and is data communication realized by transmission and reception of an IP packet to which an IP header is attached.
- the user data which UE_A10 transmits / receives may be contained in the payload part which comprises an IP packet.
- the non-IP communication is communication of data not using IP, and is data communication realized by transmission and reception of data to which an IP header is not attached.
- non-IP communication may be data communication realized by transmission and reception of application data to which an IP address is not assigned, or another header such as a MAC header or Ethernet (registered trademark) frame header may be attached to UE_A10. Transmitting and receiving user data may be transmitted and received.
- PDU session is connectivity established between UE_A 10 and DN_A 5 to provide PDU connection service. More specifically, a PDU session may be connectivity established between UE_A 10 and an external gateway.
- the external gateway may be UPF, PGW (Packet Data Network Gateway), or the like.
- the PDU session may be a communication path established for transmitting and receiving user data between the UE_A 10 and the core network and / or the DN, or may be a communication path for transmitting and receiving a PDU.
- the PDU session may be a session established between the UE_A 10 and the core network and / or DN, and is logically composed of a transfer path such as one or more bearers between respective devices in the mobile communication system 1.
- the PDU session may be a connection established by the UE_A 10 with the core network B 190 and / or the external gateway, or may be a connection established between the UE_A 10 and the UPF.
- the PDU session may be connectivity and / or connection between UE_A 10 and UPF_A 235 via NR node A 122.
- PDU sessions may be identified by PDU session ID and / or EPS bearer ID.
- UE_A10 can perform transmission / reception of user data using apparatuses, such as an application server arrange
- the PDU session can transfer user data transmitted and received between devices such as an application server located at UE_A 10 and DN_A 5.
- each device UE_A 10, a device in the access network, and / or a device in the core network, and / or a device in the data network) manages one or more pieces of identification information in association with PDU sessions.
- identification information includes APN (Access Point Name), TFT (Traffic Flow Template), session type, application identification information, identification information of DN_A5, NSI (Network Slice Instance) identification information, and DCN (Dedicated Core Network).
- APN Access Point Name
- TFT Traffic Flow Template
- session type application identification information
- identification information of DN_A5 NSI (Network Slice Instance) identification information
- DCN Dedicated Core Network
- each piece of identification information associated with a PDU session may have the same content or different content.
- the NSI identification information is information that identifies the NSI, and may be an NSI ID or a Slice Instance ID below.
- each radio access network includes an apparatus (for example, a base station apparatus or an access point) to which the UE_A 10 is actually connected.
- E-UTRAN A 80 is an LTE access network, and is configured to include one or more eNBs A 45.
- eNB_A45 is a radio base station to which UE_A10 is connected by E-UTRA (Evolved Universal Terrestrial Radio Access).
- E-UTRA Evolved Universal Terrestrial Radio Access
- the eNBs may be connected to each other.
- the NG-RAN A 120 is a 5G access network, and is configured to include one or more NR nodes (New Radio Access Technology node) A 122.
- the NR node_A 122 is a radio base station to which the UE_A 10 is connected by 5G radio access (5G Radio Access).
- 5G Radio Access 5G Radio Access
- each NR node A 122 may be connected to each other.
- NR node_A 122 is also referred to as gNB.
- the NG-RAN_A 120 may be an access network configured with E-UTRA and / or 5G Radio Access.
- NG-RAN_A 120 may include eNB_A 45, may include NR node A 122, or both of them.
- eNB_A 45 and NR node A 122 may be similar devices. Therefore, NR node A 122 can be replaced with eNB A 45.
- the UTRAN A20 is an access network of a 3G mobile communication system, and includes an RNC (Radio Network Controller) A24 and an NB (Node B) A22.
- the NB_A 22 is a radio base station to which the UE_A 10 is connected by UTRA (Universal Terrestrial Radio Access), and the UTRAN A 20 may include one or more radio base stations.
- the RNC_A 24 is a control unit that connects the core network A90 and the NB_A 22.
- the UTRAN A20 may include one or more RNCs.
- the RNC_A 24 may be connected to one or more NB_A 22.
- the RNC_A 24 may be connected to a radio base station (BSS (Base Station Subsystem) _A 26) included in the GERAN_A 25.
- BSS Base Station Subsystem
- GERAN_A 25 is a 2G access network, and includes BSS_A 26.
- BSS_A26 is a radio base station to which UE_A10 connects by GERA (GSM (registered trademark) / EDGE Radio Access), and GERAN_A25 may be comprised by one or more BSS_A26. Also, multiple BSS_A 26 may be connected to each other. Also, the BSS_A 26 may be connected to the RNC_A 24.
- the UE_A 10 is connected to each radio access network is connected to a base station apparatus or access point etc. included in each radio access network, and data, signals, etc. to be transmitted and received Also, it means that it goes through a base station apparatus and an access point.
- the control messages transmitted and received between the UE_A 10 and the core network B 190 may be the same control message regardless of the type of access network. Therefore, that UE_A10 and core network B 190 transmit and receive messages via NR node A 122 may be the same as UE A 10 and core network B 190 transmit messages via eNB A 45.
- the access network is a wireless network connected to the UE_A 10 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, or NG-RAN (Radio Access Network) _A120, and the non-3GPP access network may be a wireless LAN access point (WLAN AN).
- the UE_A 10 may be connected to the access network to connect to the core network, or may be connected to the core network via the access network.
- DN_A5 and PDN_A6 are data networks that provide communication services to UE_A 10, and may be configured as a packet data service network or may be configured for each service. Furthermore, the DN_A5 may include a connected communication terminal. Therefore, connecting with the DN_A5 may be connecting with a communication terminal or a server apparatus arranged in the DN_A5. Furthermore, transmitting / receiving user data to / from DN_A5 may be transmitting / receiving user data to / from a communication terminal or a server apparatus arranged in DN_A5. Also, although DN_A5 is outside the core network in FIG. 1, it may be inside the core network.
- core network A 90 and / or core network B 190 may be configured as devices in one or more core networks.
- the devices in the core network may be devices that execute some or all of the processes or functions of the devices included in core network A 90 and / or core network B 190.
- the devices in the core network may be referred to as core network devices.
- the core network is an IP mobile communication network operated by a mobile network operator (MNO; Mobile Network Operator) connected to an access network and / or a DN.
- the core network may be a core network for a mobile communication company that operates and manages the mobile communication system 1, a virtual mobile communication operator such as a mobile virtual network operator (MVNO) or a mobile virtual network enabler (MVNE), or a virtual mobile communication provider It may be a core network for mobile communication service providers.
- the core network A90 may be an EPC (Evolved Packet Core) configuring an EPS (Evolved Packet System), and the core network B 190 may be a 5 GC (5G Core Network) configuring 5GS.
- EPC Evolved Packet Core
- EPS Evolved Packet System
- 5G Core Network 5 GC
- core network B 190 may be a core network of a system providing 5G communication services.
- the EPC may be core network A90 and 5 GC may be core network B190.
- the core network A 90 and / or the core network B 190 is not limited to this, and may be a network for providing a mobile communication service.
- the core network _A90 includes Home Subscriber Server (HSS) A50, Authentication Authorization Accounting (AAA), Policy and Charging Rules Function (PCRF), PGW_A30, ePDG, SGW_A35, Mobility Management Entity (MME) A40, Serving GPRS Support (SGSN). At least one of Node) and SCEF may be included. And these may be comprised as NF (Network Function).
- the NF may refer to a processing function configured in the network.
- core network A90 can be connected to a plurality of radio access networks (UTRAN A20, E-UTRAN A80).
- HSS HSS
- PGW PGW
- SGW SGW
- MME MME
- the PGW_A 30 is a relay device connected to the DN, the SGW_A 35, the ePDG, the WLAN ANa 70, the PCRF, and the AAA and transferring user data as a gateway between the DN (DN_A5 and / or PDN_A6) and the core network A90.
- the PGW_A 30 may be a gateway for IP communication and / or non-IP communication. Further, the PGW_A 30 may have a function of transferring IP communication, and 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. Further, the plurality of gateways may be gateways connecting the core network _A 90 and a single DN.
- U-Plane User Plane; UP
- C-Plane Control Plane; CP
- CP Control Plane
- PGW_A 30 may be connected with SGW and DN and UPF (User plane function) and / or SMF (Session Management Function), or may be connected with UE_A 10 via U-Plane. Furthermore, PGW_A 30 may be configured together with UPF_A 235 and / or SMF_A 230.
- SGW_A35 is connected to PGW_A30, MME_A40, E-UTRAN_A80, SGSN and UTRAN_A20, and relays user data as a gateway between core network A90 and 3GPP access networks (UTRAN A20, GERAN, E-UTRAN A80) It is an apparatus.
- the MME_A 40 is connected to the SGW_A 35, the access network, the HSS_A 50, and the SCEF, and is a control device that performs location information management including mobility management of the UE A 10 via the access network and access control. Furthermore, MME_A 40 may include a function as a session management device that manages a session established by UE_A 10. In addition, a plurality of such control devices may be arranged in the core network A90, and for example, a position management device different from the MME A 40 may be configured. A location management device different from MME_A40 may be connected with SGW_A35, access network, SCEF, and HSS_A50, similar to MME_A40. Furthermore, the MME_A 40 may be connected to an Access and Mobility Management Function (AMF).
- AMF Access and Mobility Management Function
- MMEs may be connected. Thereby, transmission / reception of the context of UE_A10 may be performed between MMEs.
- the MME_A 40 is a management device that transmits and receives control information related to mobility management and session management with the UE_A 10, and in other words, may be a control device of a control plane (C-plane; CP).
- C-plane control plane
- MME_A 40 may be a management device configured to one or more core networks or DCN or NSI, or one or more core networks or It may be a management device connected to DCN or NSI.
- a plurality of DCNs or NSIs may be operated by a single carrier, or may be operated by different carriers.
- the MME_A 40 may be a relay device that transfers user data as a gateway between the core network A 90 and the access network.
- the user data transmitted and received by the MME_A 40 as a gateway may be small data.
- MME_A 40 may be an NF responsible for mobility management, such as UE_A 10, or an NF that manages one or more NSIs. Also, MME_A 40 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 _A 90, and may be a CP function for control information and / or control message (hereinafter also referred to as CPF (Control Plane Function) or Control Plane Network Function) Or a shared CP function shared among multiple network slices.
- CPF Control Plane Function
- Control Plane Network Function Control Plane Network Function
- the NF is a processing function configured in the network. That is, NF may be a functional device such as MME, SGW, PGW, CPF, AMF, SMF, UPF, etc., or may be function or capability information such as MM (Mobility Management) or SM (Session Management). Also, the NF may be a functional device for realizing a single function or a functional device for realizing a plurality of functions. For example, an NF for realizing the MM function and an NF for realizing the SM function may exist separately, or an NF for realizing both the MM function and the SM function exists. May be
- the HSS_A 50 is a management node connected to the MME_A 40, the AAA, and the SCEF and managing subscriber information.
- the subscriber information of HSS_A 50 is referred to, for example, at the time of access control of MME A 40.
- the HSS_A 50 may be connected to a location management device different from the MME_A 40.
- the HSS_A 50 may be connected to the CPF_A 140.
- HSS_A 50 may be configured as a different device and / or NF, or may be configured as the same device and / or NF.
- the AAA is connected to the PGW 30, the HSS_A 50, the PCRF, and the WLAN A Na 70, and performs access control of the UE A 10 connected via the WLAN A Na 70.
- the PCRF is connected to the PGW_A 30, the WLAN ANa 75, the AAA, the DN_A 5 and / or the PDN_A 6, and performs QoS management for data delivery. For example, management of QoS of a communication path between UE_A10 and DN_A5 and / or PDN_A6 is performed.
- the PCRF may be a device that creates and / or manages Policy and Charging Control (PCC) rules and / or routing rules that each device uses to transmit and receive user data.
- PCC Policy and Charging Control
- the PCRF may 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 AN b 75, and delivers user data as a gateway between the core network _A 90 and the WLAN AN b 75.
- the SGSN is connected to UTRAN A20, GERAN A 25 and SGW A 35, and is a control device for position management between the 3G / 2G access network (UTRAN / GERAN) and the LTE (4G) access network (E-UTRAN) It is. Furthermore, the SGSN has a selection function of PGW and SGW, a management function of time zone of UE_A 10, and a selection function of MME_A 40 at the time of handover to E-UTRAN.
- the SCEF is a relay apparatus connected to the DN_A5 and / or PDN_A6, the MME_A40, and the HSS_A50, and transferring user data as a gateway connecting the DN_A5 and / or PDN_A6 and the core network A90.
- the SCEF may be a gateway for non-IP communication.
- SCEF may have a function to convert 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 with 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.
- Core network B 190 includes Authentication Server Function (AUSF), Access and Mobility Management Function (AMF) _A 240, Unstructured Data Storage Function (UDSF), Network Exposure Function (NEF), Network Repository Function (NRF), Policy Control (PCF) Function), SMF (Session Management Function) A230, UDM (Unified Data Management), UPF (User Plane Function) A235, AF (Application Function), N3 IWF (Non-3GPP InterWorking Function), or at least one of them may be included. . And these may be comprised as NF (Network Function).
- the NF may refer to a processing function configured in the network.
- AMF_A240 AMF
- SMF_A230 SMF
- UPF_A235 UPF
- UE_A10 is also referred to as UE
- AMF_A240 AMF
- SMF_A230 SMF
- UPF_A235 UPF
- DN_A5 DN.
- FIG. 3 describes 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 the (R) AN (access network) with
- the N4 interface is the interface between SMF and UPF
- the N6 interface is the interface between UPF and DN
- the N9 interface is the interface between UPF and UPF
- N11 interface is an interface between AMF and SMF. Communication can be performed between devices using these interfaces.
- FIG. 3 is a system configuration diagram when the UE accesses two DNs simultaneously using a plurality of PDU sessions. Two SMFs are selected for two different PDU sessions. Further, in FIG. 3, two SMF_A 230 and two UPF_A 235 are provided.
- AMF_A 240 is connected to other AMFs, SMFs (SMF_A 230), access networks (that is, UTRAN A 20, E-UTRAN A 80 and NG-RAN A 120), UDM, AUSF, and PCF.
- AMF_A 240 Registration management, Connection management, Reachability management, Mobility management such as UE_A10, Transfer of SM (Session Management) messages between UE and SMF , Access Authentication (Access Authorization), Security Anchor Function (SEA), Security Context Management (SCM), Security Context Management (SCM), N2 interface support for N3 IWF, NAS signaling with UE via N3 IWF It may play a role of support of transmission and reception, authentication of UE connected via N3IWF, management of RM state (Registration Management states), management of CM state (Connection Management states), and the like.
- SMF_A 230 Registration management, Connection management, Reachability management, Mobility management such as UE_A10, Transfer of SM (Session Management
- AMF_A 240 may be arranged in core network B 190.
- the AMF_A 240 may be an NF that manages one or more NSI (Network Slice Instance).
- the AMF_A 240 may be a shared CP function (CCNF; Common CPNF (Control Plane Network Function)) shared among a plurality of NSIs.
- CCNF Common CPNF (Control Plane Network Function)
- RM-DEREGISTERED state there are a non-registration state (RM-DEREGISTERED state) and a registration state (RM-REGISTERED state).
- RM-DEREGISTERED state since the UE is not registered in the network, the AMF can not reach the UE because the UE context in the AMF does not have valid location information or routing information for the UE. is there.
- the UE in the RM-REGISTERED state, since the UE is registered in the network, the UE can receive services that require registration with the network.
- CM-IDLE state there are a disconnected state (CM-IDLE state) and a connected state (CM-CONNECTED state).
- CM-IDLE state the UE is in the RM-REGISTERED state but has no NAS signaling connection established with the AMF via the N1 interface.
- the UE does not have the connection of the N2 interface (N2 connection) and the connection of the N3 interface (N3 connection).
- N2 connection N2 connection
- N3 connection connection of the N3 interface
- the NAS signaling connection NAS signaling connection
- the UE may have an N2 interface connection (N2 connection) and / or an N3 interface connection (N3 connection).
- SMF_A 230 routes traffic to a session management (SM) function such as a PDU session, IP address allocation to the UE (IP address allocation) and its management function, UPF selection and control function, and an appropriate destination.
- SM session management
- Function to set UPF function to notify that downlink data has arrived (Downlink Data Notification), AN-specific (per AN) to be sent to AN via AMF via N2 interface
- It may have a function of providing SM information, a function of determining SSC mode (Session and Service Continuity mode) for a session, a roaming function, and the like.
- SMF_A 230 may be connected to AMF_A 240, UPF_A 235, UDM, and PCF.
- UPF_A 235 is connected to DN_A5, SMF_A 230, other UPFs, and access networks (ie UTRAN A 20, E-UTRAN A 80 and NG-RAN A 120).
- UPF_A235 is an UL link function (UL CL) function that supports anchor for intra-RAT mobility or inter-RAT mobility, packet routing & forwarding, routing of multiple traffic flows for one DN, Branching point function that supports multi-homed PDU session (multi-homed PDU session), QoS processing for user plane, uplink traffic verification (verification), downlink packet buffering, downlink data notification (Downlink Data Notification) It may play a role such as a trigger function.
- UL CL UL link function
- UPF_A 235 may be a relay apparatus that transfers user data as a gateway between DN_A 5 and core network B 190.
- UPF_A 235 may be a gateway for IP communication and / or non-IP communication.
- UPF_A 235 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 arranged may be gateways connecting the core network B 190 and a single DN.
- UPF_A 235 may have connectivity with other NFs, and may be connected to each device via other NFs.
- UPF_C 239 (also referred to as a branching point or uplink classifier), which is a UPF different from UPF_A 235, may exist between UPF_A 235 and the access network as a device or an NF. If UPF C239 is present, a PDU session between UE A 10 and DN A 5 will be established via the access network, UPF C 239, UPF A 235.
- AUSF is connected to UDM and AMF_A 240. AUSF functions as an authentication server.
- UDSF provides the ability for all NFs to store and retrieve information as unstructured data.
- the NEF provides a means to securely provide the services provided by the 3GPP network.
- Information received from other NFs is stored as structured data.
- the NRF When the NRF receives an NF discovery request from an NF instance, the NRF provides the NF with information on the discovered NF instance, information on available NF instances, and information on services supported by the instances. Hold
- the PCF is connected to SMF (SMF_A 230), AF, and AMF_A 240. Provide policy rules etc.
- the UDM is connected to AMF_A 240, SMF (SMF_A 230), AUSF, and PCF.
- UDM includes UDM FE (application front end) and UDR (User Data Repository).
- the UDM FE performs processing such as authentication information (credentials), location management (location management), subscriber management (subscription management) and the like.
- the UDR stores data necessary for the UDM FE to provide and policy profiles required by the PCF.
- the AF is connected to the PCF. AF affects traffic routing and participates in policy control.
- N3 IWF establishes the IPsec tunnel with the UE, relays the NAS (N1) signaling between the UE and the AMF, processes the N2 signaling sent from the SMF and relayed by the AMF, establishes the IPsec Security Association (IPsec SA) And provides functions such as relaying of user plane packets between the UE and the UPF, and AMF selection.
- IPsec SA IPsec Security Association
- UE_A10 is comprised by control part_A400, transmission / reception part_A420, and memory
- the transmission / reception unit A420 and the storage unit A440 are connected to the control unit A400 via a bus.
- an external antenna 410 is connected to the transmission / reception unit A420.
- the control unit A 400 is a functional unit for controlling the entire UE A 10, and realizes various processes of the entire UE A 10 by reading and executing various information and programs stored in the storage A 440.
- the transmitter / receiver unit A 420 is a functional unit for connecting the UE A 10 to the base stations (UTRAN A 20, E-UTRAN A 80, and NG RAN A 120) in the access network and / or the wireless LAN access point (WLAN AN) and connecting to the access network. is there.
- the UE_A 10 can connect to a base station and / or an access point in the access network via the external antenna 410 connected to the transceiver unit A 420.
- the UE_A 10 transmits / receives user data and / or control information to / from a base station and / or access point in the access network via the external antenna 410 connected to the transceiver unit_A 420. Can.
- the storage unit_A 440 is a functional unit that stores programs, data, and the like necessary for each operation of the UE_A 10, and is configured of, for example, a semiconductor memory, a hard disk drive (HDD), a solid state drive (SSD), or the like.
- the storage unit_A 440 stores identification information, control information, flags, parameters, rules, policies, and the like included in control messages transmitted and received in a communication procedure described later.
- the eNB_A 45 and the NR node A 122 are configured of a control unit B 500, a network connection unit B 520, a transmission / reception unit B 530, and a storage unit B 540.
- the network connection unit B 520, the transmission / reception unit B 530, and the storage unit B 540 are connected to the control unit B 500 via a bus.
- an external antenna 510 is connected to the transmission / reception unit B 530.
- the control unit B 500 is a functional unit for controlling the whole of the eNB A 45 and the NR node A 122, and by reading and executing various information and programs stored in the storage unit B 540, the whole of the eNB A 45 and the NR node A 122 Implement various processing.
- the network connection unit B 520 is a functional unit for connecting the eNB A 45 and the NR node A 122 to the AMF A 240 and the UPF A 235 in the core network.
- eNB_A 45 and NR node A 122 can be connected to AMF A 240 and UPF A 235 in the core network via network connection unit B 520.
- the eNB A 45 and the NR node A 122 can transmit and receive user data and / or control information to and from the AMF A 240 and / or the UPF A 235 via the network connection unit B 520.
- the transmission / reception unit B 530 is a functional unit for connecting the eNB A 45 and the NR node A 122 to the UE A 10.
- the eNB_A 45 and the NR node A 122 can transmit and receive user data and / or control information to and from the UE A 10 via the transceiver unit B 530.
- the storage unit B 540 is a functional unit that stores programs, data, and the like necessary for each operation of the eNB A 45 and the NR node A 122.
- the storage unit B 540 is configured of, for example, a semiconductor memory, an HDD, an SSD, or the like.
- the storage unit B 540 stores identification information, control information, flags, parameters, and the like included in control messages transmitted and received in a communication procedure described later.
- Storage unit B 540 may store these pieces of information as contexts for each UE A 10.
- the MME_A 40 or AMF_A 240 is configured of a control unit C 600, a network connection unit C 620, and a storage unit C 640.
- the network connection unit C 620 and the storage unit C 640 are connected to the control unit C 600 via a bus.
- the storage unit C 640 stores the context 642.
- the control unit C 600 is a functional unit for controlling the entire MME A 40 or the AMF A 240, and realizes various processes of the entire AMF A 240 by reading and executing various information and programs stored in the storage unit C 640. Do.
- the network connection unit _C620 includes MME_A40 or AMF_A240, another MME_A40, AMF_240, SMF_A230, base stations in the access network (UTRAN_A20, E-UTRAN_A80, NG-RAN_A120) and / or a wireless LAN access point (WLAN AN), UDM , AUSF, and a functional unit for connecting to PCF.
- MME_A 40 or AMF_A 240 transmits / receives user data and / or control information to / from a base station and / or access point in the access network, UDM, AUSF, PCF via network connection unit C 620.
- the storage unit C 640 is a functional unit that stores programs, data, and the like necessary for each operation of the MME A 40 or the AMF A 240.
- the storage unit C 640 is configured of, for example, a semiconductor memory, an HDD, an SSD, or the like.
- the storage unit C 640 stores identification information, control information, a flag, parameters, and the like included in a control message transmitted and received in a communication procedure described later.
- As the context 642 stored in the storage unit C 640 there may be a context stored for each UE, a context stored for each PDU session, and a context stored for each bearer.
- IMSI As the context 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 S1 AP ID, eNB UE S1 AP ID, NR node Address, NR node ID, WAG Address, WAG ID may be included.
- the context stored for each PDU session may include APN in Use, Assigned Session Type, IP Address (es), PGW F-TE ID, SCEF ID, and Default bearer.
- 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, WAG ID may be included.
- the SMF_A 230 includes a control unit D 700, a network connection unit D 720, and a storage unit D 740.
- the network connection unit D 720 and the storage unit D 740 are connected to the control unit D 700 via a bus.
- the storage unit _D 740 stores a context 742.
- the control unit D 700 of the SMF A 230 is a functional unit for controlling the entire SMF A 230, and realizes various processes of the entire SMF A 230 by reading and executing various information and programs stored in the storage unit D 740. Do.
- the network connection unit_D 720 of the SMF_A 230 is a functional unit for connecting the SMF_A 230 to the AMF_A 240, the UPF_A 235, the UDM, and the PCF.
- the SMF_A 230 can transmit / receive user data and / or control information to / from the AMF_A 240, UPF_A 235, UDM, and PCF via the network connection unit D 720.
- a storage unit D740 of the SMF_A 230 is a functional unit that stores programs, data, and the like necessary for each operation of the SMF_A 230.
- the storage unit_D 740 of the SMF_A 230 is configured of, for example, a semiconductor memory, an HDD, an SSD, or the like.
- the storage unit _D 740 of the SMF_A 230 stores identification information, control information, a flag, parameters, and the like included in a control message transmitted and received in a communication procedure described later.
- a context stored for each UE may include IMSI, ME Identity, MSISDN, RAT type.
- the context stored per APN may include APN in use.
- 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, Default Bearer.
- the context stored for each bearer may include EPS Bearer ID, TFT, SGW F-TEID, PGW F-TEID.
- PGW_A 30 or UPF_A 235 is configured of a control unit D 700, a network connection unit D 720, and a storage unit D 740, respectively.
- the network connection unit D 720 and the storage unit D 740 are connected to the control unit D 700 via a bus.
- the storage unit _D 740 stores a context 742.
- a control unit D700 of PGW_A30 or UPF_A235 is a functional unit for controlling the entire PGW_A30 or UPF_A235, and reads and executes various information and programs stored in the storage unit _D740 to execute PGW_A30 or UPF_A235. Realize various processing of the whole.
- the network connection unit D720 of PGW_A30 or UPF_A235 is connected to DN (that is, DN_A5), SMF_A230, other UPF_A235, and access network (that is, UTRAN_A20, E-UTRAN_A80, and NG-RAN_A120) with PGW_A30 or UPF_A235. It is a functional part to do.
- UPF_A 235 is connected between DN (ie, DN_A5), SMF_A 230, other UPF_A 235, and access networks (ie, UTRAN A20, E-UTRAN A80, and NG-RAN A120) via network connection D 720.
- User data and / or control information can be sent and received.
- a storage unit D740 of the UPF_A 235 is a functional unit that stores programs, data, and the like necessary for each operation of the UPF_A 235.
- the storage unit_D 740 of the UPF_A 235 is configured of, for example, a semiconductor memory, an HDD, an SSD, or the like.
- a storage unit _D 740 of the UPF_A 235 stores identification information, control information, a flag, parameters, and the like included in a control message transmitted and received in a communication procedure described later.
- the context stored for each UE may include IMSI, ME Identity, MSISDN, RAT type.
- the context stored per APN may include APN in use.
- 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, Default Bearer.
- the context stored for each bearer may include EPS Bearer ID, TFT, SGW F-TEID, PGW F-TEID.
- the IMSI International Mobile Subscriber Identity
- UE_A10 and 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.
- the EMM State / MM State may be an EMM-REGISTERED state (registered state) in which the UE_A 10 is registered in the network, and / or an EMM-DEREGISTERD state (unregistered state) in which the UE_A 10 is not registered in the network.
- the EMM State / MM State may be an ECM-CONNECTED state in which the connection between the UE_A 10 and the core network is maintained, and / or an ECM-IDLE state in which the connection is released.
- EMM State / MM State may be information that can distinguish between the state in which UE_A 10 is registered in EPC and the state registered in NGC or 5 GC.
- GUTI Globally Unique Temporary Identity
- MME_A40 / CPF_A140 / AMF_A240 GUMMEI (Globally Unique MME Identifier)
- M-TMSI M-Temporary Mobile Subscriber Identity
- ME Identity is an ID of UE_A10 or ME, and may be, for example, International Mobile Equipment Identity (IMEI) or IMEISV (IMEI Software Version).
- MSISDN represents the basic telephone number of UE_A10.
- the MSISDN stored in the MME_A40 / CPF_A140 / AMF_A240 may be the information indicated by the storage unit of the HSS_A50.
- the GUTI may include information for identifying the CPF_140.
- MME F-TEID is information for identifying MME_A40 / CPF_A140 / AMF_A240.
- MME F-TEID may include the IP address of MME_A40 / CPF_A140 / AMF_A240, may include TEID (Tunnel Endpoint Identifier) of MME_A40 / CPF_A140 / AMF_A240, or both of them. It is also good. Also, 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.
- the SGW F-TEID is information for identifying the SGW_A 35.
- the SGW F-TEID may include the IP address of SGW_A35, the TEID of SGW_A35, or both of them. Also, the IP address of the SGW_A 35 and the TEID of the SGW_A 35 may be stored independently. Further, 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 the TEID of PGW_A30 / UPGW_A130 / SMF_A230 / UPF_A235, or both of them may be included. Good.
- the 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.
- the PGW F-TEID may be identification information for user data or identification information for control information.
- the eNB F-TEID is information for identifying the eNB_A 45.
- the eNB F-TEID may include the IP address of the eNB_A 45, may include the TEID of the eNB_A 45, or may include both of them.
- the IP address of eNB_A45 and TEID of SGW_A35 may be stored independently.
- the eNB F-TEID may be identification information for user data or identification information for control information.
- the APN may be identification information for identifying the core network and an external network such as a DN. Furthermore, the APN can also be used as information for selecting a gateway such as PGW_A30 / UPGW_A130 / UPF_A235 connecting the core network A_90.
- the APN may be 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.
- one gateway may be selected from 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_A 10.
- UE Network Capability includes security algorithms and key derivation functions supported by UE_A10.
- MS Network Capability is information including one or more pieces of information necessary for SGSN_A 42 for UE_A 10 having GERAN_A 25 and / or UTRAN_A 20 functions.
- Access Restriction is registration information of access restriction.
- eNB Address is an 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 which identifies UE_A10 within eNB_A45.
- APN in Use is a recently used APN.
- the APN in Use may be a Data Network Identifier. This APN may be composed of network identification information and default operator identification information. Furthermore, APN in Use may be information identifying a DN to which a PDU session is established.
- Assigned Session Type is information indicating the type of PDU session. Assigned Session Type may be Assigned PDN Type. The type of PDU session may be IP or non-IP. Furthermore, when the type of PDU session is IP, it may further include information indicating the type of PDN assigned from the network. The Assigned Session Type may be IPv4, IPv6 or IPv4 v6.
- 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.
- Assigned Session Type indicates non-IP, the element of IP Address may not be included.
- the DN ID is identification information for identifying the core network B 190 and an external network such as a DN. Furthermore, the DN ID can also be used as information for selecting a gateway such as UPGW_A 130 or PF_A 235 connecting core network B 190.
- the DN ID may be identification information identifying such a gateway, or identification information identifying an external network such as a DN.
- identification information identifying an external network such as a DN.
- one of the plurality of gateways may be selected by another method using identification information other than DN ID.
- the DN ID may be information equal to the APN or information different from the APN. If the DN ID and the APN are different information, each device may manage information indicating the correspondence between the DN ID and the APN, or even if the procedure for inquiring the APN using the DN ID is performed. The procedure may be carried out using the APN to inquire the DN ID.
- the SCEF ID is the IP address of the SCEF_A 46 used in the PDU session.
- the Default Bearer is information acquired and / or generated when establishing a PDU session, and is EPS bearer identification information for identifying a default bearer associated with the PDU session.
- the EPS Bearer ID is identification information of the EPS bearer.
- the EPS Bearer ID may be identification information for identifying Signaling Radio Bearer (SRB) and / or Control-plane Radio Bearer (CRB), or identification information for identifying Data Radio Bearer (DRB).
- TI Transaction Identifier
- EPS Bearer ID may be EPS bearer identification information identifying a dedicated bearer (dedicated bearer). Therefore, identification information may be used to identify an EPS bearer different from the default bearer.
- the TFT shows all packet filters associated with the EPS bearer.
- the TFT is information for identifying a part of the user data to be transmitted / received, and the UE_A 10 transmits / receives the user data identified by the TFT using an EPS bearer associated with the TFT. Furthermore, in other words, the UE_A 10 transmits and receives user data identified by the TFT using an RB (Radio Bearer) associated with the TFT. Also, the TFT may correspond to user data such as application data to be transmitted / received to an appropriate transfer path, or may be identification information for identifying application data. Moreover, UE_A10 may transmit / receive the user data which can not be identified by TFT using a default bearer. Also, UE_A 10 may store in advance the TFT associated with the default bearer.
- Default Bearer is EPS bearer identification information that identifies a default bearer associated with a PDU session.
- the EPS bearer may be a logical communication path established between the UE_A 10 and the PGW_A 30 / UPGW_A 130 / UPF_A 235, or may be a communication path forming 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_A 10 and a base station and / or access point in the access network.
- RBs and EPS bearers 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 may be 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 at the time of PDU session establishment.
- the default bearer is an EPS bearer initially established in a PDN connection / PDU session, and is an EPS bearer that can only be established in one PDN connection / PDU session.
- the default bearer may be an EPS bearer that can be used to communicate 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 more than once in one PDN connection / PDU session. is there.
- the dedicated bearer is an EPS bearer that can be used to communicate user data associated with the TFT.
- User Identity is information identifying a subscriber.
- the User Identity may be IMSI or MSISDN.
- User Identity may be identification information other than IMSI and MSISDN.
- Serving Node Information is information 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 an IP address of eNB_A45.
- the eNB ID is information for identifying the UE in the eNB_A 45.
- MME Address is an IP address of MME_A40 / CPF_A140 / AMF_A240.
- MME ID is information which identifies MME_A40 / CPF_A140 / AMF_A240.
- the NR node Address is an IP address of the NR node_A 122.
- the NR node ID is information for identifying the NR node_A 122.
- WAG Address is the IP address of WAG_A 126.
- the WAG ID is information for identifying the WAG_A 126.
- the network indicates at least a part 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.
- one or more devices included in at least a part of the access network A20 / 80, access network B80 / 120, core network A90, core network B190, DN A5, and PDN A6 are a network or a network device. You may call it. That is, the fact that the network performs message transmission and reception and / or procedure means that a device (network device) in the network performs message transmission and reception and / or procedure.
- a session management (SM) message (also referred to as NAS (Non-Access-Stratum) SM message) may be a NAS message used in a procedure for SM, and UE_A10 through AMF_A 240.
- SMF_A 230 may be control messages sent and received.
- the SM message includes a PDU session establishment request message, a PDU session establishment accept message, a PDU session complete message, a PDU session reject message, a PDU session change request message, a PDU session change accept message, a PDU session change reject message, etc.
- the procedure for SM may include a PDU session establishment procedure, a PDU session change procedure, and the like.
- the tracking area (TA; also referred to as Tracking Area) in the present embodiment is a range that can be represented by the location information of the UE_A 10 managed by the core network, and may be configured of, for example, one or more cells. Also, the TA may be in a range where a control message such as a paging message is broadcast or may be in a range where the UE_A 10 can move without performing a handover procedure.
- the TA list is a list including one or more TAs allocated to the UE_A 10 by the network.
- the UE_A 10 may be able to move without executing the registration procedure while moving in one or more TAs included in the TA list.
- the TA list may be an information group indicating areas where the UE_A 10 can move without performing the registration procedure.
- a network slice is a logical network that provides specific network capabilities and network characteristics.
- the network slice may be referred to as an NW slice.
- the NSI (Network Slice Instance) in the present embodiment is an entity of a network slice (Network Slice) configured one or more in the core network B 190. Further, the NSI in the present embodiment may be configured by a virtual network function (NF) generated using NST (Network Slice Template).
- NST is a logical expression of one or more network functions (NFs), which is associated with a resource request for providing the required communication service or capability. That is, the NSI may be an aggregate within the core network _B 190 configured by a plurality of NFs. Also, the NSI may be a logical network configured to divide user data delivered by a service or the like.
- a network slice may be configured with at least one or more NFs.
- the NF configured in the network slice may or may not be a device shared with other network slices.
- the UE_A 10 and / or the device in the network are 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 etc. It may be assigned to one or more network slices based on registration information and / or APN.
- S-NSSAI in this embodiment is an abbreviation for Single Network Slice Selection Assistance information, and is information for identifying a network slice.
- S-NSSAI may be configured of SST (Slice / Service type) and SD (Slice Differentiator).
- S-NSSAI may be configured with only SST or may be configured with both SST and SD.
- SST is information indicating an operation of a network slice expected in terms of functions and services.
- SD may be information that complements SST when selecting one NSI from a plurality of NSIs indicated by SST.
- the S-NSSAI may be information specific to each Public Land Mobile Network (PLMN), or may be standard information shared between PLMNs.
- PLMN Public Land Mobile Network
- the network may store one or more S-NSSAI in the registration information of UE_A 10 as default S-NSSAI.
- NSSAI Single Network Slice Selection Assistance information in the present embodiment is a collection of S-NSSAI.
- Each S-NSSAI contained in NSSAI is information for assisting the access network or core network to select NSI.
- the UE_A 10 may store the NSSAI granted by the network for each PLMN.
- NSSAI may be information used to select AMF_A 240.
- the first NW slice is an NW slice to which an established PDU session belongs when the UE_A 10 connects to a specific DN.
- the first NW slice may be an NW slice managed in the operator A network or an NW slice commonly managed in the operator B network.
- the second NW slice in this 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.
- the first NW slice and the second NW slice may be operated by the same operator, or may be operated by different operators.
- the operator A network in the present embodiment is a network operated by the operator A.
- a common NW slice with operator B may be deployed.
- the operator B network in the present embodiment is a network operated by the operator B.
- An NW slice common to the operator A may be deployed.
- equivalent PLMNs are PLMNs treated as being the same HPLMN and the same PLMN in the network.
- the DCN (Dedicated Core Network) in the present embodiment is a core network dedicated to a specific subscriber type configured one or more in the core network _A 90.
- a DCN for a UE registered as a user of the M2M (Machine to Machine) communication function may be configured in the core network A90.
- a default DCN may be configured in the core network _A 90 for UEs that do not have an appropriate DCN.
- at least one or more MME_40 or SGSN_A42 may be arranged in the DCN, and further, at least one or more SGW_A35 or PGW_A30 or PCRF_A60 may be arranged.
- DCN may be identified by DCN ID, and further, UE may be allocated to one DCN based on information such as UE usage type and / or DCN ID.
- the re-attempt (Re-attempt) information in the present embodiment is information that the network (NW) instructs the UE_A 10 whether to allow reconnection using the same identification information for a rejected PDU session.
- the re-attempt information may be set for each UTRAN access, E-UTRAN access, NR access, or slice information.
- the re-attempt information specified in the access unit may be allowed to reconnect to the network on the premise of the access change.
- the re-attempt information specified in slice units may specify slice information different from the rejected slice, and reconnection using the specified slice information may be permitted.
- the first behavior in this embodiment is a behavior in which the UE stores 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 sent in the first PDU session establishment request message, or store slice information received when the first PDU session establishment request is rejected. May be
- the second behavior in this embodiment is the same APN / DNN as the first PDU session establishment request, using different slice information different from the slice information designated by the UE in the first PDU session establishment. It is an action of sending a PDU session establishment request for connection.
- the second behavior is that, when the back-off timer value received from the network is zero or invalid, the UE uses slice information different from the slice information specified in the first PDU session establishment, It may be an action of transmitting a PDU session establishment request for connecting to the same APN / DNN as the first PDU session establishment request. Also, if the first PDU session is rejected because the radio access of the specific PLMN to which the designated APN / DNN is connected is not supported, or the first PDU session is rejected for temporary reasons.
- 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 designated in the first PDU session establishment. It may be an action of sending a PDU session establishment request for
- the third behavior in this embodiment is that, when the PDU session establishment request is rejected, the UE transmits a new PDU session establishment request using the same identification information until the first timer expires. Not behaving. Specifically, the third behavior is that if the UE receives from the network neither a backoff timer value of zero nor invalid, the new PDU uses the same identification until the first timer expires. The behavior may be such that the session establishment request is not sent. Also, when another PLMN is selected, or another NW slice is selected, when a rejection reason for a network operation configuration failure is received, the first PDU session establishment request is received when it is rejected. When the backoff timer is activated, it may be a behavior that does not send a new PDU session establishment request using the same identification information until the first timer expires.
- the fourth behavior in this embodiment is to load slice information and DNN / APN information until the first timer expires when the PDU session establishment request sent by the UE in the Registration procedure is rejected. There is no behavior to send a new PDU session establishment request. Specifically, the fourth behavior is that if the back-off timer received from the network by the UE is neither zero nor invalid, the new PDU will not carry slice information, DNN / APN information until the first timer expires. The behavior may be such that the session establishment request is not sent.
- the fifth behavior in this 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. Specifically, the fifth behavior is that a new PDU session using the same identification information is performed when the UE is located in an equal PLMN when the PDP types supported by the UE and the network are different. It may be a behavior that does not send the establishment request.
- the sixth behavior in this 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 is the same identification information when the UE is rejected because the first PDU session establishment request does not have the target PDN session context in the handover from non-3GPP access. It may be an action of sending a new PDU session establishment request as an initial procedure using
- the seventh behavior in this embodiment is that, when the UE selects another NW slice in the procedure of selecting a PLMN, the backoff timer received when the previous PDU session establishment request is rejected is continued. It is a behavior. Specifically, the seventh behavior is that when the UE performs PLMN selection when the first PDU session establishment request is rejected, it is specified by the first PDU session establishment request in the PLMN to be selected. If it is possible to specify an NW slice common to the above NW slices, the behavior may be such that the backoff timer received when the first PDU session establishment request is rejected is continued.
- the eighth behavior in this embodiment is a behavior in which the UE sets a value notified from the network or a value set in advance to the UE as a first timer value.
- the eighth behavior may be a behavior in which the UE sets the backoff 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 such that the value to be set or held in the UE is set as the first timer value.
- the timer to be set or held in the UE in advance is set as the first timer value, it may be limited to the HPLMN or even when the equal PLMN is present.
- the ninth behavior in this embodiment is a behavior in which the UE does not transmit a new PDU session establishment request until terminal power on / off or USIM removal / removal when the PDU session establishment request is rejected.
- the first PDU session rejection reason is the PDP type (PDP type) between the UE and the network If not, it does not send a new PDU session establishment request until the terminal power on / off or USIM removal / insertion.
- the connected PLMN does not send a new PDU session establishment request until the terminal power on / off or USIM removal / insertion.
- the terminal is turned on.
- the tenth behavior in this embodiment is a behavior in which the UE transmits a new PDU session establishment request when the PDU session establishment request is rejected. Specifically, in the tenth behavior, the UE is further notified from the network when the backoff timer received from the network is zero or when the first PDU session establishment request is rejected for a temporary reason. It may be the behavior of sending a new PDU session establishment request if there is no backoff timer information element itself to be sent. When another PLMN is selected or another NW slice is selected, the target APN / DNN is selected in the selected PLMN when the first PDU session establishment request is rejected for temporary reasons.
- the backoff timer is not activated or if the backoff timer received from the network is invalid, it may be a behavior to send a new PDU session establishment request.
- the first PDU session establishment request is rejected because the PDP types of the UE and the network are different, when different PLMNs are selected, Re-attempt information is not received or PLMN not in the equivalent PLMN list. Or when the PDP type is changed, or when the terminal is turned on / off or when the USIM is removed / inserted, a new PDU session establishment request may be transmitted.
- the first PDU session is rejected because the designated 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 sending an establishment request.
- the eleventh behavior in this embodiment is a behavior in which the UE ignores the first timer and Re-attempt information.
- the eleventh behavior is that the UE is rejected if the first PDU session establishment request is rejected because there is no PDN session context of interest in the handover from non-3GPP access, or The behavior is to ignore the first timer and Re-attempt information when the first PDU session establishment is rejected because the number of bearers in the PDN connection has reached the maximum allowable number. It is also good.
- the twelfth behavior in this embodiment is a plurality of related NW slices based on information for identifying one NW slice received by the UE in a rejection notification for the first PDU session establishment request. It is a behavior that determines information for identification, and suppresses reconnection to a plurality of related NW slices 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 in the first PDU session establishment request rejection based on the network slice association rule. It may be a behavior that derives information to do so.
- the network slice association rule may be set in advance to the UE, or may be notified from the network by notification of rejection of PDU session establishment.
- different congestion management is activated for establishment of a plurality of PDU sessions by the same UE, and when a plurality of timers are received from the network, the UE has a priority management rule of the backoff timer.
- the timer may be managed based on For example, the first PDU session establishment request of the combination of DNN_1 and slice_1 by the UE is subject to congestion management based on both DNN and slice information, and the UE is notified of the first timer # 1 (first timer Receive the value # 1).
- the UE makes a second PDU session establishment request for the combination of DNN_1 and slice_2, and is targeted for congestion management based only on DNN, and the first timer # 2 (first timer value) Also called # 2).
- the UE may manage the PDU session re-establishment behavior of the UE by the prioritized first timer # 2 based on the priority management rule of the backoff timer.
- the timer value generated by the prioritized congestion control may overwrite the timer value held by the UE.
- each session management instance PDU session unit
- the first PDU session establishment of the combination of DNN # 1 and slice # 1 by the UE is considered as a congestion target based on both DNN and slice information, and the UE receives the first timer # 1.
- the UE manages a plurality of timers (here, the first timer # 1 and the first timer # 2) simultaneously. Specifically, the UE manages a timer on a session management instance / PDU session basis.
- the network slice association rule in the present embodiment is a rule that associates 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 to UE_A10. Furthermore, the network slice association rules may be applied to the newest one in UE_A10. Conversely, UE_A 10 may behave based on the latest network slice association rules. For example, when a new network slice association rule is received in a PDU session rejection message in a state where a network slice association rule is set in advance in UE_A10, UE_A10 updates the network slice association rule held in UE_A10. It is also good.
- the priority management rule of the backoff timer in the present embodiment is a rule set in UE_A 10 in order to collectively manage a plurality of backoff timers occurring in a plurality of PDU sessions into one backoff timer. For example, when contention or overlapping congestion management is applied, and when the UE holds a plurality of backoff timers, the UE_A 10 performs a plurality of backoff timers based on the priority management rule of the backoff timer. You may manage it collectively.
- the pattern where contention or overlapping congestion management occurs is when congestion management based only on DNN and congestion management based on both DNN and slice information are applied simultaneously, in this case, congestion based only on DNN Management takes precedence.
- the priority management rule of the backoff timer may not be limited to this.
- the backoff timer may be a first timer included in the PDU session rejection message.
- the first timer is set for a plurality of related NW slices based on the information for identifying one NW slice as described above, and is a backoff timer for suppressing reconnection, or APN /
- it may be set as a combination of DNN and one NW slice and may be a backoff timer for preventing reconnection, it is not limited to this, and information for identifying APN / DNN and one NW slice is used.
- the backoff timer may be set based on a combination of a plurality of related NW slices, and may be a backoff timer for suppressing reconnection.
- the first identification information in the present embodiment is information for identifying belonging 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 the 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 the same NW slice is commonly identified in the operator B (other operators other than the operator A). It may be information to be
- the first identification information may be information for identifying the first NW slice set from the HPLMN, or for identifying the first NW slice acquired from the AMF in the registration procedure. It may be information or may be information for identifying a first NW slice permitted from the network.
- the first identification information may be information for identifying a first NW slice stored for each PLMN.
- the second identification information in the present embodiment may be DNN (Data Network Name) and may be information used to identify DN (Data Network).
- the third identification information in the present embodiment may be a PDU session ID (PDU Session ID) and may be information used to identify a PDU session (PDU Session).
- PDU Session ID PDU session ID
- PDU Session PDU Session
- the eleventh identification information in the present embodiment is information indicating a cause value (cause) indicating that the PDU session establishment procedure has been rejected.
- the eleventh identification information may be information indicating that a request for establishing a PDU session connected to the DN has been rejected.
- the eleventh identification information may be information indicating that the request for establishment of the PDU session belonging to the first NW slice has been rejected, or establishment of the PDU session belonging to the first NW slice is It may be information indicating that it 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 eleventh 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. It 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. Furthermore, 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_A 10 currently belongs and / or the tracking area is not permitted, or UE_A 10 May be information indicating that establishment of a PDU session belonging to the first NW slice is not permitted in the connected access network.
- the reason values indicating that the PDU session establishment procedure indicated by the eleventh identification information has been rejected may not be limited to these.
- the eleventh identification information may be information indicating the value of the first timer.
- the UE may set the value indicated by the eleventh identification information to the first timer based on the reception of the eleventh identification information, or may set the timer value set by another method. You may set a random value.
- the eleventh identification information may be identification information for identifying one or more NW slices that determine the NW slice to which the rejected PDU session request belongs.
- the eleventh identification information may be identification information that instructs the network to reconnect after the PDU session is rejected.
- the re-attempt information may be set for each UTRAN access, E-UTRAN access, NR access, or slice information unit.
- the eleventh 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 EPS.
- the auxiliary information may be information indicating a DCN ID.
- the eleventh identification information may be a network slice association rule, which is a rule for associating multiple slice information.
- the UE may start the execution of the set timer based on the rejection reason value, the NW slice information, and the identification information instructing reconnection from the network.
- the EPS is based on the received rejection reason value, auxiliary information for appropriate MME selection by the radio access system included in the identification information instructing reconnection from the network, You may start location registration with.
- the twelfth identification information in the present embodiment may be DNN and may be DNN that the network did not permit, or information indicating that DNN identified by the second identification information is not permitted. It may be. Furthermore, the twelfth identification information may be the same DNN as the second identification information.
- the thirteenth identification information in the present embodiment may be a PDU session ID, which may be a PDU session ID not permitted by the network, or a PDU session ID identified by the third identification information is permitted. It may be information indicating that there is no. Furthermore, the thirteenth identification information may be the same PDU session ID as the third identification information.
- the initial procedure in the present embodiment will be described using FIG.
- the initial procedure is also referred to as this procedure
- the initial procedure includes a registration procedure and a PDU session establishment procedure. Details of the registration procedure and the PDU session establishment procedure will be described later.
- each device executes the registration procedure (S800), whereby the UE_A 10 transitions to the state registered in the network (RM-REGISTERED state).
- each device executes a PDU session establishment procedure (S802), whereby UE_A 10 establishes a PDU session with DN_A5, which provides PDU connection service, via core network B 190, between the respective devices. Transition to the state where the PDU session is established.
- this PDU session is assumed to be established via the access network UPF_A 235, it is not limited thereto. That is, a UPF (UPF_C239) different from UPF_A235 may exist between UPF_A235 and the access network. At this time, this PDU session will be established via the access network, UPF_C 239, UPF_A 235.
- Each device may exchange various capability information and / or various request information of each device in the registration procedure and / or the PDU session establishment procedure. Further, when each device performs exchange of various information and / or negotiation of various requests in the registration procedure, each device may not exchange the various information and / or negotiate various requests in the PDU session establishment procedure. In addition, each device may perform exchange of various information and / or negotiation of various requests by the PDU session establishment procedure, when the exchange of various information and / or the negotiation of various requests are not performed by the registration procedure. In addition, even when each device performs exchange of various information and / or negotiation of various requests in the registration procedure, each device may perform exchange of various information and / or negotiation of various requests in the PDU session establishment procedure.
- each device may perform a PDU session establishment procedure in the registration procedure, and may perform it after the registration procedure is completed. Also, if the PDU session establishment procedure is performed in the registration procedure, the PDU session establishment request message may be included and transmitted in the registration request message, and the PDU session establishment accept message may be transmitted and received in the registration acceptance message. The PDU session establishment complete message may be transmitted and received in the registration complete message, and the PDU session establishment rejection message may be transmitted and received in the registration rejection message. Also, if the PDU session establishment procedure is performed in the registration procedure, each device may establish a PDU session based on the completion of the registration procedure, or if a PDU session is established between the devices. It may transition.
- Each device involved in this procedure transmits and receives one or more identification information included in each control message by transmitting and receiving each control message described in this procedure, and stores each transmitted and received identification information as a context. It is also good.
- the registration procedure is a procedure initiated by the UE_A 10 to be registered in the network (access network and / or core network B 190 and / or DN_A 5). If UE_A 10 is not registered in the network, it can execute this procedure at an arbitrary timing such as power on. In other words, the UE_A 10 may start this procedure at any timing as long as it is in the non-registration state (RM-DEREGISTERED state). Also, each device may transition to the registration state (RM-REGISTERED state) based on the completion of the registration procedure.
- this procedure updates the location registration information of UE_A10 in the network and / or periodically notifies the network of UE_A10 status from UE_A10 and / or updates specific parameters regarding UE_A10 in the network. It may be a procedure of
- the UE_A 10 may start this procedure when performing mobility across TAs. In other words, the UE_A 10 may start this procedure when moving to a TA different from the TA indicated in the held TA list. Furthermore, the UE_A 10 may initiate this procedure when the running timer has expired. Furthermore, UE_A 10 may initiate this procedure when it is necessary to update the context of each device due to disconnection or invalidation (also referred to as deactivation) of a PDU session. Furthermore, the UE_A 10 may initiate this procedure if there is a change in the capability information and / or preferences regarding the PDU session establishment of the UE_A 10. Furthermore, UE_A 10 may periodically initiate this procedure. The UE_A 10 is not limited to these, and can execute this procedure at any timing as long as a PDU session is established.
- UE_A10 starts the registration procedure by transmitting a registration request (Registration Request) message to AMF_A 240 via NR node (also referred to as gNB) _A 122 (S900) (S902) (S904). Also, the UE_A 10 transmits an SM message (for example, a PDU session establishment request message) by transmitting a SM (Session Management) message (for example, a PDU session establishment request message) in the registration request message or with the registration request message. By doing this, procedures for SM such as PDU session establishment procedure may be started during the registration procedure.
- SM Session Management
- the UE_A 10 transmits an RRC (Radio Resource Control) message including a registration request message to the NR node A 122 (S900).
- RRC Radio Resource Control
- the NR node_A 122 extracts the registration request message from the RRC message, and selects AMF_A 240 as the NF or shared CP function of the routing destination of the registration request message (S 902).
- the NR node A 122 may select AMF A 240 based on the information included in the RRC message.
- the NR node A 122 transmits or transfers a registration request message to the selected AMF A 240 (S904).
- the registration request message is a NAS (Non-Access-Stratum) message transmitted and received on the N1 interface.
- an RRC message is a control message transmitted / received between UE_A10 and NR node_A122.
- the NAS message is processed in the NAS layer, the RRC message is processed in the RRC layer, and the NAS layer is a layer higher than the RRC layer.
- UE_A10 may transmit a registration request message for every NSI, when multiple NSI which request
- the AMF A 240 performs the first condition determination when it receives a control request message different from the registration request message and / or the registration request message.
- the first condition determination is to determine whether the AMF A 240 accepts the request of the UE A 10.
- AMF_A 240 determines whether the first condition determination is true or false.
- AMF_A 240 starts the procedure of (A) in this procedure when the first condition determination is true (ie, when the network accepts the request of UE_A 10), and when the first condition determination is false (ie, when the first condition determination is false). , (If the network does not accept the request of UE_A 10), start the procedure of (B) in this procedure.
- AMF_A 240 executes the fourth condition determination and starts the procedure of (A) in this procedure.
- the fourth condition determination is to determine whether the AMF_A 240 carries out transmission and reception of an SM message with the SMF_A 230.
- the fourth condition determination may be to determine whether or not the AMF A 240 performs the PDU session establishment procedure during this procedure.
- AMF_A 240 selects SMF_A 230 and transmits and receives SM messages with selected SMF_A 230. If the fourth condition determination is false (ie, if the AMF A 240 does not implement transmission and reception of SM messages with the SMF A 230), they are omitted (S906).
- AMF_A 240 receives an SM message indicating rejection from SMF_A 230, it may cancel the procedure of (A) in this procedure and start the procedure of (B) in this procedure.
- AMF A 240 sends a Registration Accept message to UE A 10 via NR node A 122 based on the receipt of the registration request message from UE A 10 and / or the completion of the transmission and reception of the SM message with SMF A 230. (S908). For example, if the fourth condition determination is true, the AMF A 240 may send a registration acceptance message based on the receipt of the registration request message from the UE A 10. Also, if the fourth condition determination is false, the AMF A 240 may send a registration acceptance message based on the completion of transmission and reception of the SM message with the SMF A 230. Here, the registration acceptance message may be sent as a response message to the registration request message.
- the registration acceptance message is a NAS message transmitted / received on the N1 interface, for example, AMF_A 240 transmits to NR node A 122 as a control message of N 2 interface, and NR node A 122 receiving this transmits an RRC message to UE A 10. It may be included and sent.
- the AMF A 240 sends an SM message (e.g., a PDU session establishment accept message) in the registration accept message, or sends the SM message (e.g. The session establishment acceptance message may be sent.
- This transmission method may be performed when an SM message (for example, a PDU session establishment request message) is included in the registration request message and the fourth condition determination is true. Also, this transmission method may be performed when an SM message (for example, a PDU session establishment request message) is included together with the registration request message, and the fourth condition determination is true.
- AMF_A 240 may indicate that the procedure for SM has been accepted by performing such a transmission method.
- the UE_A 10 receives the registration acceptance message via the NR node A 122 (S 908).
- the UE_A 10 recognizes the contents of various identification information included in the registration acceptance message by receiving the registration acceptance message.
- UE_A10 transmits a Registration Complete message to AMF_A 240 based on the reception of the registration acceptance message (S910).
- the UE A 10 may transmit the registration completion message including an SM message such as a PDU session establishment completion message, or by including the SM message. , And may indicate that the procedure for SM is completed.
- the registration complete message may be sent as a response message to the registration acceptance message.
- the registration completion message is a NAS message transmitted / received on the N1 interface, for example, UE_A10 transmits it to the NR node_A 122 by including it in the RRC message, and the NR node_A 122 which received this transmits it to the AMF_A 240 It may be sent as a control message.
- the AMF_A 240 receives the registration completion message (S910). Also, each device completes the procedure of (A) in this procedure based on transmission and reception of the registration acceptance message and / or the registration completion message.
- the AMF_A 240 starts the procedure of (B) in this procedure by transmitting a Registration Reject message to the UE_A 10 via the NR node A 122 (S912).
- the registration rejection message may be sent as a response message to the registration request message.
- the registration rejection message is a NAS message transmitted / received on the N1 interface.
- AMF_A 240 transmits to NR node A 122 as a control message of N 2 interface, and NR node A 122 receiving this transmits an RRC message to UE A 10. It may be included and sent.
- the registration rejection message transmitted by AMF_A 240 is not limited to this as long as the message rejects the request of UE_A 10.
- the procedure of (B) in this procedure may be started when the procedure of (A) in this procedure is canceled.
- the AMF A 240 may transmit, in the registration rejection message, an SM message indicating rejection such as a PDU session establishment rejection message, etc.
- the inclusion of a semantic SM message may indicate that the procedure for the SM has been rejected.
- UE_A 10 may further receive an SM message meaning rejection, such as a PDU session establishment rejection message, or may recognize that the procedure for SM has been rejected.
- UE_A10 may recognize that the request of UE_A10 is rejected by receiving the registration rejection message or not receiving the registration acceptance message.
- Each device completes the procedure of (B) in this procedure based on transmission and reception of the registration refusal message.
- Each device completes the procedure (registration procedure) based on the completion of the procedure (A) or (B) in the procedure.
- Each device may transition to the state (RM_REGISTERED state) in which UE_A 10 is registered in the network based on the completion of the procedure of (A) in this procedure, or the procedure of (B) in this procedure.
- the UE_A 10 may maintain a state (RM_DEREGISTERED state) that is not registered in the network based on the completion of.
- the transition to each state of each device 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 perform processing based on the identification information transmitted and received in this procedure based on the completion of this procedure.
- the first condition determination may be performed based on the identification information included in the registration request message and / or the subscriber information and / or the operator policy. For example, the first condition determination may be true if the network allows the UE_A 10 request. Also, the first condition determination may be false if the network does not permit the request of UE_A 10. Furthermore, the first condition determination may be true if the network to which UE_A 10 is registered and / or a device in the network supports the function requested by UE A 10, and false if it does not support it. Good. Furthermore, the first condition determination may be true if it is determined that the network is in a congested state, and may be false if it is determined that the network is not in a congested state. The conditions under which the true / false determination of the first condition determination is determined are not limited to the conditions described above.
- the fourth condition determination may be performed based on whether AMF_A 240 has received an SM or may be performed based on whether an SM message is included in the registration request message. For example, the fourth condition determination may be true if AMF A 240 receives an SM, and / or if the registration request message includes an SM message, if AMF A 240 does not receive an SM, and It may be false if the registration request message does not include the SM message.
- the conditions under which the fourth condition determination is determined to be true or false may not be limited to the conditions described above.
- 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 the state where the registration procedure is completed, or may execute this procedure in the registration procedure. Also, each device may start this procedure in the registered state, or may start this procedure at any timing after the registration procedure. Also, each device may establish a PDU session based on the completion of the PDU session establishment procedure. Furthermore, each device may establish multiple PDU sessions by executing this procedure multiple times.
- PDU session establishment procedure example An example of the 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 transmits a PDU session establishment request (PDU Session Establishment Request) message to SMF_A 230 via NR node_A 122 and AMF_A 240 (S1000) (S1002) (S1004) to start a PDU session establishment procedure.
- PDU Session Establishment Request PDU Session Establishment Request
- the UE_A 10 transmits a PDU session establishment request message to the AMF_A 240 via the NR node A 122 using the N1 interface (S1000).
- AMF A 240 receives the PDU session establishment request message, it selects SMF A 230 as an NF to which the PDU session establishment request message is routed (S 1002), and transmits a PDU session establishment request message to selected SMF A 230 using the N11 interface or Transfer (S1004).
- the AMF_A 240 may select the routing destination SMF_A 230 based on the information included in the PDU session establishment request message.
- the AMF A 240 transmits each identification information and / or subscriber information obtained based on the reception of the PDU session establishment request message, and / or network capability information, and / or operator policy, and / or network.
- the routing destination SMF_A 230 may be selected based on the state and / or the context that the AMF_A 240 already holds.
- the PDU session establishment request message may be a NAS message. Also, the PDU session establishment request message may be any message that requests establishment of a PDU session, and is not limited thereto.
- UE_A10 may include one or more identification information of the first to third identification information in the PDU session establishment request message, and indicates the request of UE_A10 by including these identification information. It is also good.
- the 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 UE_A 10 transmits the first identification information and / or the second identification information and / or the third identification information in the PDU session establishment request message, thereby transmitting the PDU session belonging to the network slice. It may request establishment, indicate a network slice to which a PDU session belongs, which UE_A 10 requests, or indicate a network slice to which a PDU session is to belong.
- the UE_A 10 associates and transmits the first identification information and the second identification information, thereby transmitting the network in the PDU session established for the DN identified by the second identification information. It may request establishment of a PDU session belonging to a slice, indicate a network slice to which the PDU session belongs, requested by the UE_A 10, or indicate a network slice to which the PDU session is to belong.
- the UE_A 10 may make a request combining the above-mentioned matters by transmitting by combining two or more identification information of the first to third identification information.
- the thing which UE_A10 shows by transmitting each identification information may not be restricted to these.
- UE_A10 sets which identification information of the first to third identification information to be included in the PDU session establishment request message, UE_A10 capability information, and / or policy such as UE policy, and / or UE_A10 It may be determined based on the reference and / or the application (upper layer). Note that the determination of which identification information is included in the PDU session establishment request message by the UE_A 10 is not limited to this.
- the SMF_A 230 receives the PDU session establishment request message and performs the third condition determination.
- the third condition determination is for determining whether the SMF_A 230 accepts the request of the UE_A 10 or not. In the third condition determination, the SMF_A 230 determines whether the third condition determination is true or false.
- the SMF_A 230 starts the procedure of (A) in the present procedure if the third condition determination is true, and starts the procedure of (B) in the procedure if the third condition determination is false. The step in the case where the third condition determination is false will be described later.
- the SMF_A 230 selects UPF_A 235 as the PDU session establishment destination, and executes an eleventh condition determination.
- the eleventh condition determination is for determining whether each device executes the PDU session establishment authentication approval procedure.
- the SMF_A 230 determines whether the eleventh condition determination is true or false.
- the SMF_A 230 starts the PDU session establishment authentication approval procedure if the eleventh condition judgment is true (S1005), and omits the PDU session establishment authentication approval procedure if the eleventh condition judgment is false.
- the details of the PDU session establishment authentication approval procedure will be described later.
- SMF_A 230 transmits a session establishment request (Session Establishment request) message to selected UPF_A 235 based on completion of the eleventh condition determination and / or PDU session establishment authentication approval procedure (S1006), and this procedure is in progress.
- Session Establishment request Session Establishment request
- S1006 PDU session establishment authentication approval procedure
- the SMF_A 230 may start the procedure (B) in the procedure without starting the procedure (A) in the procedure based on the completion of the PDU session establishment authentication approval procedure.
- SMF_A 230 is each identification information acquired based on reception of a PDU session establishment request message, and / or network capability information, and / or subscriber information, and / or operator policy, and / or network status, And / or one or more UPF_A 235 may be selected based on the context already held by SMF_A 230. When a plurality of UPFs A 235 are selected, the SMF A 230 may transmit a session establishment request message to each UPF A 235.
- UPF_A 235 receives the session establishment request message and creates a context for the PDU session. Furthermore, UPF_A 235 transmits a session establishment response (Session Establishment response) message to SMF_A 230 based on reception of a session establishment request message and / or creation of a context for a PDU session (S1008). Furthermore, the SMF_A 230 receives a 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. Furthermore, the session establishment response message may be a response message to the session establishment request message.
- SMF_A 230 may perform address assignment of an address to be assigned to UE_A 10 based on receipt of a PDU session establishment request message and / or selection of UPF_A 235 and / or receipt of a session establishment response message. In addition, SMF_A 230 may perform the address assignment of the address assigned to UE_A 10 during the PDU session establishment procedure or after the completion of the PDU session establishment procedure.
- the SMF_A 230 may perform address allocation during the PDU session establishment procedure, or may transmit the allocated address to the UE_A 10. Furthermore, when allocating an IPv4 address and / or an IPv6 address and / or an IPv6 prefix using DHCPv4 or DHCPv6 or SLAAC (Stateless Address Autoconfiguration), the SMF A 230 may perform address allocation after the PDU session establishment procedure. The assigned address may be sent to UE_A10. The address assignment performed by the SMF_A 230 is not limited to these.
- SMF_A 230 may include the assigned address in the PDU session establishment acceptance message and send it to UE A 10 based on the completion of the address assignment of the address assigned to UE A 10, or send it to UE A 10 after completing the PDU session establishment procedure. You may
- SMF_A 230 sends to UE_A10 via AMF_A 240 based on the reception of the PDU session establishment request message and / or the selection of UPF_A 235 and / or the reception of the session establishment response message and / or the address assignment of the address assigned to UE_A10.
- a PDU session establishment accept message is sent (S1010).
- SMF_A 230 transmits a PDU session establishment acceptance message to AMF_A 240 using the N11 interface
- AMF_A 240 that receives the PDU session establishment acceptance message transmits a PDU session establishment acceptance message to UE_A 10 using the N1 interface.
- the PDU session establishment accept message may be a PDN connectivity accept message.
- the PDU session establishment accept message may be an N11 interface and a NAS message sent and received on the N1 interface.
- the PDU session establishment acceptance message is not limited to this, and may be a message indicating that the PDU session establishment has been accepted.
- the UE_A 10 receives a PDU session establishment acceptance message from the SMF_A 230.
- the UE_A 10 recognizes the contents of various 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 complete (PDU session establishment complete) message to SMF_A 230 via AMF_A 240 based on the completion of reception of the PDU session establishment acceptance message (S1014). Furthermore, SMF_A 230 receives the PDU session establishment complete message and performs the second condition determination.
- PDU session establishment complete PDU session establishment complete
- UE_A10 transmits a PDU session establishment complete message to AMF_A 240 using an N1 interface
- AMF_A 240 that receives the PDU session establishment complete message transmits a PDU session establishment complete message to SMF_A 230 using an N11 interface.
- the PDU session establishment complete message may be a PDN Connectivity Complete message or a Default EPS Bearer Context Accept message.
- the PDU session establishment complete message may be a NAS message sent 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_A 230 to determine the type of message to be transmitted / received on the N4 interface. If the second condition determination is true, the SMF_A 230 transmits a session modification request message (Session Modification request) to the UPF_A 235 (S1018), and further, the session modification acceptance transmitted by the UPF_A 235 that has received the session modification request message (Session Modification response) ) Receive the message (S1020). If the second condition determination is false, the SMF_A 230 transmits a session establishment request message to the UPF_A 235 (S1018), and further receives a session change acceptance message transmitted by the UPF_A 235 that has received the session establishment request message (S1020) .
- Session Modification request Session Modification request
- S1020 Session Modification response
- Each device performs (A) in this procedure based on transmission / reception of a PDU session establishment complete message, and / or transmission / reception of a session change response message, and / or transmission / reception of a session establishment response message, and / or transmission / reception of RA. Complete the procedure.
- the SMF_A 230 transmits a PDU session establishment reject message to the UE A 10 via the AMF A 240 (S 1022), and starts the procedure of (B) in this procedure.
- SMF_A 230 transmits a PDU session establishment rejection message to AMF_A 240 using the N11 interface
- AMF_A 240 that receives the PDU session establishment request message transmits a PDU session establishment rejection message to UE_A 10 using the N1 interface.
- the PDU session establishment rejection message may be a PDN connectivity reject message. Further, the PDU session establishment rejection message may be an N11 interface and a NAS message transmitted and received on the N1 interface. Also, the PDU session establishment rejection message is not limited to this, and may be a message indicating that the establishment of a PDU session has been rejected.
- the SMF_A 230 may include one or more identification information of the eleventh to thirteenth identification information in the PDU session establishment rejection message, and the request of the UE_A 10 is rejected by including these identification information. You may also indicate The two or more pieces of identification information of these pieces of identification information may be configured as one or more pieces of identification information.
- SMF_A 230 transmits the 11th identification information and / or the 12th identification information and / or the 13th identification information in the PDU session establishment rejection message, thereby transmitting the PDU session belonging to the network slice. It may indicate that the request for establishment has been rejected, or it may indicate a network slice that is not authorized to belong to the PDU session.
- the SMF_A 230 associates and transmits the eleventh identification information and the twelfth identification information, thereby transmitting the network in the PDU session established for the DN identified by the twelfth identification information. It may indicate that the request for establishment of a PDU session belonging to a slice has been rejected, or it may indicate a network slice that is not permitted to belong to a PDU session.
- SMF_A 230 includes the eleventh identification information in the PDU session establishment rejection message, and transmits the PDU session belonging to the network slice in the registration area and / or tracking area to which UE_A 10 currently belongs. It may indicate that the request for establishment has been rejected, or it may indicate a network slice that is not authorized to belong to the PDU session.
- the SMF_A 230 includes the eleventh identification information in the PDU session establishment rejection message and transmits it, whereby the request for establishment of the PDU session belonging to the network slice is rejected in the access network to which the UE_A 10 is currently connected. Or a network slice that is not authorized to belong to a PDU session.
- SMF_A 230 may indicate the value of the first timer by transmitting the eleventh identification information in the PDU session establishment rejection message, and may repeat the same procedure as this procedure again after this procedure is completed. It may indicate whether or not to carry out.
- the SMF_A 230 may make a request combining the above-mentioned matters by transmitting by combining two or more pieces of identification information among the eleventh to thirteenth identification information.
- the items indicated by the transmission of the identification information by the SMF_A 230 may not be limited to these.
- the SMF_A 230 determines which identification information of the eleventh to thirteenth identification information is to be included in the PDU session establishment rejection message, the received identification information, and / or the network capability information, and / or the operator policy, etc. It may be determined based on the policy of the network 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 eleventh 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 of which identification information to put in the PDU session establishment rejection message by SMF_A 230 is not limited to this.
- UE_A 10 receives a PDU session establishment rejection message from SMF_A 230.
- the UE_A 10 performs the fourth process based on the reception of the PDU session establishment rejection message (S1024).
- UE_A10 may implement a 4th process based on completion of this procedure.
- the fourth process may be a process in which the UE_A 10 recognizes the matter indicated by the SMF_A 230. Furthermore, the fourth process may be a process in which the UE_A 10 stores the received identification information as a context, or may be a process in which the received identification information is transferred to the upper layer and / or the lower layer. . Furthermore, the fourth process may be a process in which the UE_A 10 recognizes that the request for this procedure has been rejected.
- the fourth process may be a process in which the UE_A 10 sets the value indicated by the eleventh identification information as the first timer value, or the timer value. May be a process of starting a first timer in which is set. Furthermore, when the UE_A 10 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 process determines that the UE_A 10 identifies the NW slice included in the eleventh identification information and the network slice association included in the eleventh identification information.
- the process may be a process of executing a twelfth behavior based on a network slice association rule that the rule or the UE_A 10 holds and sets in advance.
- UE_A10 when UE_A10 receives a plurality of eleventh identification information, in the fourth process, UE_A10 includes a plurality of first timers included in each of the eleventh identification information and a backoff timer held by UE_A10. It may be processing of executing a thirteenth behavior based on the priority management rule.
- the fourth process performs the fourteenth behavior based on the plurality of first timers included in each of the eleventh identification information. It may be a process to
- the twelfth to fourteenth behaviors may be congestion management led and executed by the UE_A 10 based on rules and / or policies in the UE_A 10.
- the UE_A 10 stores a policy (UE policy; UE policy) and / or a rule, a policy and / or a management function of the policy, and / or the policy in the storage and / or control unit inside the UE_A 10.
- a policy enforcer that operates UE_A 10 based on a rule, one or more applications, and a session management instance (a session for managing one or more PDU sessions that attempt establishment or establishment based on a request from each application) And may be configured, and any one of the twelfth to fourteenth behaviors may be executed as the fourth process based on these to realize congestion management led by the UE_A 10.
- the policy and / or rules may include any one or more of network slice association rules, and / or priority management rules of backoff timers, and / or NSSP (Network Slice Selection Policy), and further, These may be preset in UE_A 10 or may be received from the network.
- the policy enforcer may be an NSSP enforcer.
- the application may be an application layer protocol, and may attempt to establish or establish a PDU session based on the request from the application layer protocol.
- the session management instance may be a software element dynamically generated on a per PDU session basis.
- S-NSSAI may be grouped, or processing based on grouping of S-NSSAI may be executed.
- the internal configuration and processing of the UE_A 10 may not be limited to these, and each element may be realized by software or may be executed as software processing within the UE_A 10.
- UE_A 10 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 the DCN ID included in the eleventh identification information. Good.
- switching to EPS of UE_A10 may be based on a handover procedure, and may be RAT switching which UE_A10 leads.
- UE_A10 may perform switching to EPS during completion of a 4th process, or a 4th process, when the 11th identification information in which DCN ID was contained is received.
- the fourth process may be a process in which the UE_A 10 transitions to a state in which the request of the UE_A 10, which may be a process of starting this procedure again after a certain period, is limited.
- the fourth process may not be limited to these processes.
- UE_A10 may recognize that the request of UE_A10 is rejected by receiving a PDU session establishment rejection message or by not receiving a PDU session establishment acceptance message.
- Each device completes the procedure of (B) in this procedure based on transmission and reception of a PDU session establishment rejection message.
- Each device completes the procedure based on the completion of the procedure of (A) or (B) in the procedure.
- Each device may transition to a state in which a PDU session is established based on the completion of the procedure of (A) in this procedure, or based on the completion of the procedure of (B) in this procedure. It may recognize that this procedure has been rejected, or may transition to a state in which a PDU session has not been established.
- each device may perform processing based on the identification information transmitted and received in this procedure based on the completion of this procedure.
- the UE_A 10 may perform the fourth process based on the completion of this procedure.
- the third condition determination may be performed based on the identification information contained in the PDU session establishment request message and / or the subscriber information and / or the operator policy. For example, the third condition determination may be true if the network allows the UE_A 10 request. Also, the third condition determination may be false if the network does not permit the request of UE_A 10. Furthermore, the third condition determination may be true if the network to which the UE_A 10 is connected and / or a device within the network supports the function requested by the UE_A 10, and false if it does not support the function. Good. Furthermore, the third condition determination may be true if it is determined that the network is in the congested state, and may be false if it is determined that the network is not in the congested state. The conditions under which the third condition determination is determined to be true or false may not be limited to the conditions described above.
- the second condition determination may be performed based on whether a session on the N4 interface for a PDU session has been established. For example, the second condition determination may be true if a session on the N4 interface for a PDU session has been established, and may be false if not.
- the conditions under which the second condition determination is determined may not be limited to the conditions described above.
- the eleventh condition determination may be performed based on identification information included in the PDU session establishment request message, and / or subscriber information, and / or operator policy. For example, the eleventh condition determination may be true if the network permits the DN_A5 to perform authentication and / or approval during this procedure. In addition, the eleventh condition determination may be false if the network does not permit performing authentication and / or approval according to DN_A5 in this procedure. Furthermore, the eleventh condition determination is true if the network to which the UE_A 10 is connected and / or a device within the network support performing authentication and / or approval by the DN_A5 in this procedure. And may be false if not supported.
- the eleventh condition determination may be true when the 61st identification information is received, and may be false when it is not received. 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. Note that the conditions for determining the authenticity of the eleventh condition determination may not be limited to the conditions described above.
- the first identification information is information indicating the value of the backoff timer managing the session management behavior of the user apparatus
- the second identification information is PDU (Protocol Data Unit) Or Packet Data Unit) information for identifying one or more network slices to which a PDU session for which a session establishment request has been rejected belongs
- the third identification information is a network slice that permits PDU session reconnection
- the fourth identification information is a network slice association rule that associates information for identifying a network slice belonging to a rejected PDU session with information for identifying another network slice.
- the fifth identification information is information for identifying a DCN (Dedicated Core Network), and the sixth identification information is The information is information indicating a reason why the request for establishment of a PDU session is rejected, and the user equipment is a PDU session including at least one of the first to sixth identification information in a PDU session establishment procedure with respect to a core network.
- the first identification information is information indicating the value of the backoff timer that manages the session management behavior of the user device
- the second identification information is the establishment of a PDU session.
- Information for identifying one or more network slices to which the PDU session for which the request has been rejected belongs, and the third identification information is information for identifying a network slice that permits PDU session reconnection
- the fourth identification information is information for indicating a network slice association rule that associates information for identifying a network slice belonging to a rejected PDU session with information for identifying another network slice
- Identification information is information for identifying the DCN
- the sixth identification information is the reason why the request for establishment of the PDU session is rejected.
- the core network device has a transmitting / receiving unit for transmitting a PDU session establishment rejection message including the first to sixth at least one identification information in a PDU session establishment procedure with respect to the core network. It features.
- the first identification information is information indicating the value of the backoff timer that manages the session management behavior of the user apparatus
- the second identification information is a PDU session.
- the fourth identification information is information for indicating a network slice association rule that associates information for identifying a network slice belonging to a rejected PDU session with information for identifying another network slice.
- the fifth identification information is information for identifying a DCN (Dedicated Core Network), and the sixth identification information is an establishment of a PDU session.
- a transmission / reception unit that transmits a PDU session establishment rejection message including at least one of the first to sixth at least one identification information in a PDU session establishment procedure with respect to a core network. It is characterized by having.
- the first identification information is information indicating a value of a backoff timer that manages session management behavior of the user apparatus
- the second identification information is PDU ( Protocol Data Unit or Packet Data Unit) Information for identifying one or more network slices to which a PDU session to which a session establishment request has been rejected belongs is identified
- the third identification information permits PDU session reconnection Network slice
- the fourth identification information is a network slice that associates information for identifying a network slice belonging to a rejected PDU session with information for identifying another network slice.
- the fifth identification information is information for identifying a DCN (Dedicated Core Network), and the sixth identification information is information for indicating an association rule.
- the identification information of is the information indicating the reason why the request for establishment of the PDU session is rejected, and the user equipment sets the first identification information to the first timer in the PDU session establishment procedure with respect to the core network. And D. receiving a PDU session establishment rejection message including the first to sixth at least one identification information.
- the first identification information is information indicating a value of a back-off timer that manages session management behavior of the user device
- the second identification information is PDU (Protocol Data Unit or Packet Data Unit) information for identifying one or more network slices to which a PDU session for which a session establishment request is rejected is to be belonged
- the third identification information is a PDU session reconnection.
- the fifth identification information is information for identifying a slice association rule
- the fifth identification information is information for identifying a DCN (Dedicated Core Network).
- the sixth identification information is information indicating a reason why the request for establishment of the PDU session is rejected
- the core network device is configured to, in the PDU session establishment procedure with respect to the core network, at least one of the first to sixth Sending a PDU session establishment rejection message including one of the identification information.
- the first identification information is information indicating the value of the backoff timer managing the session management behavior of the user apparatus
- the second identification information is PDU (Protocol Data Unit) Or Packet Data Unit) information for identifying one or more network slices to which a PDU session for which a session establishment request has been rejected belongs
- the third identification information is a network slice that permits PDU session reconnection
- the fourth identification information is a network slice association rule that associates information for identifying a network slice belonging to a rejected PDU session with information for identifying another network slice.
- the fifth identification information is information for identifying a DCN (Dedicated Core Network), and the sixth identification information is information for indicating.
- a PDU session establishment rejection message including at least one of the first to sixth identification information in a PDU session establishment procedure with respect to a core network, the information indicating a reason why a request for establishment of a PDU session is rejected Sending the information.
- the program that operates in the apparatus according to the present invention may be a program that controls a central processing unit (CPU) or the like to cause a computer to function so as to realize the functions of the embodiments according to the present invention.
- the program or information handled by the program is temporarily stored in volatile memory such as Random Access Memory (RAM) or nonvolatile memory such as flash memory, Hard Disk Drive (HDD), or other storage system.
- volatile memory such as Random Access Memory (RAM) or nonvolatile memory such as flash memory, Hard Disk Drive (HDD), or other storage system.
- a program for realizing the functions of the embodiments according to the present invention may be recorded in a computer readable recording medium. It may be realized by causing a computer system to read and execute the program recorded in this recording medium.
- the "computer system” referred to here is a computer system built in an apparatus, and includes hardware such as an operating system and peripheral devices.
- the “computer-readable recording medium” is a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a medium for dynamically holding a program for a short time, or another computer-readable recording medium. Also good.
- each functional block or feature of the device used in the above-described embodiment can be implemented or implemented 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 the like. Programmable logic devices, discrete gates or transistor logic, discrete hardware components, or combinations thereof.
- a general purpose processor may be a microprocessor or may be a conventional processor, controller, microcontroller, or state machine.
- the electric circuit described above may be configured by a digital circuit or may be configured by an analog circuit.
- one or more aspects of the present invention may employ new integrated circuits according to such technology.
- the present invention is not limited to the above-described embodiment. Although an example of the device is described in the embodiment, the present invention is not limited thereto, and a stationary or non-movable electronic device installed indoors and outdoors, for example, an AV device, a kitchen device
- the present invention can be applied to terminal devices or communication devices such as cleaning and washing equipment, air conditioners, office equipment, vending machines, and other household appliances.
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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11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_B190の詳細を記載した図である。図11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_A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_B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_A、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4に示す。図4に示すように、UE_A10は、制御部_A400、送受信部_A420、記憶部_A440で構成される。送受信部_A420及び記憶部_A440は、制御部_A400とバスを介して接続されている。また、送受信部_A420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5に示す。図5に示すように、eNB_A45及びNR node_A122は、制御部_B500、ネットワーク接続部_B520、送受信部_B530、記憶部_B540で構成されている。ネットワーク接続部_B520、送受信部_B530及び記憶部_B540は、制御部_B500とバスを介して接続されている。また、送受信部_B530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6に示す。図6に示すように、MME_A40又はAMF_A240は、制御部_C600、ネットワーク接続部_C620、記憶部_C640で構成されている。ネットワーク接続部_C620及び記憶部_C640は、制御部_C600とバスを介して接続されている。また、記憶部_C640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7に示す。図7に示すように、SMF_A230は、それぞれ、制御部_D700、ネットワーク接続部_D720、記憶部_D740で構成されている。ネットワーク接続部_D720及び記憶部_D740は、制御部_D700とバスを介して接続されている。また、記憶部_D740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7に示す。図7に示すように、PGW_A30又はUPF_A235は、それぞれ、制御部_D700、ネットワーク接続部_D720、記憶部_D740で構成されている。ネットワーク接続部_D720及び記憶部_D740は、制御部_D700とバスを介して接続されている。また、記憶部_D740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9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10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、NR node_A122とAMF_A240とを介して、SMF_A230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(S1000) (S1002) (S1004)、PDUセッション確立手続きを開始する。
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。
5 DN_A
6 PDN_A
10 UE_A
20 UTRAN_A
22 NB_A
24 RNC_A
30 PGW_A
35 SGW_A
40 MME_A
45 eNB_A
50 HSS_A
80 E-UTRAN_A
90 コアネットワーク_A
120 NG-RAN_A
122 NR node_A
190 コアネットワーク_B
230 SMF_A
235 UPF_A
239 UPF_C
240 AMF_A
Claims (2)
- 制御部を備えたUE(User Equipment)であって、
第1のタイマーは、DNN(Data Network Name)毎に、DNNに基づいた輻輳管理のために開始され、
第2のタイマーは、S-NSSAI(Single Network Slice Selection Assistance information)及びDNN毎に、S-NSSAIに基づいた輻輳管理のために実行され、
前記第1のタイマー及び前記第2のタイマーは、前記UEによって提供される同一のDNNと関連付けられており、
前記制御部は、前記第1のタイマーと前記第2のタイマーを同時に実行する、
ことを特徴とするUE。 - UE(User Equipment)の通信制御方法であって、
第1のタイマーは、DNN(Data Network Name)毎に、DNNに基づいた輻輳管理のために開始され、
第2のタイマーは、S-NSSAI(Single Network Slice Selection Assistance information)及びDNN毎に、S-NSSAIに基づいた輻輳管理のために実行され、
前記第1のタイマー及び前記第2のタイマーは、前記UEによって提供される同一のDNNと関連付けられており、
前記UEは、前記第1のタイマーと前記第2のタイマーを同時に実行する、
ことを特徴とするUEの通信制御方法。
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AU2018369300A AU2018369300B2 (en) | 2017-11-20 | 2018-11-20 | Ue and communication control method for UE |
RU2020119592A RU2781234C2 (ru) | 2017-11-20 | 2018-11-20 | Оборудование пользователя и способ управления связью для оборудования пользователя |
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CN201880074953.9A CN111972038B (zh) | 2017-11-20 | 2018-11-20 | Ue以及ue的通信控制方法 |
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US11317318B2 (en) * | 2018-02-16 | 2022-04-26 | Nec Corporation | Distinguishing between general NAS level congestion and S-NSSAI related congestion control |
CN110392422B (zh) * | 2018-04-23 | 2020-10-09 | 华为技术有限公司 | 一种确定时钟源的方法及装置 |
JP6884731B2 (ja) * | 2018-06-21 | 2021-06-09 | シャープ株式会社 | Ue通信制御方法 |
JP7216553B2 (ja) * | 2019-01-11 | 2023-02-01 | シャープ株式会社 | Ue、コアネットワーク装置、及び通信制御方法 |
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US11864026B2 (en) * | 2020-09-18 | 2024-01-02 | Verizon Patent And Licensing Inc. | Systems and methods for access barring based on slice information |
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