WO2022097290A1 - 端末及び通信システム - Google Patents
端末及び通信システム Download PDFInfo
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- WO2022097290A1 WO2022097290A1 PCT/JP2020/041631 JP2020041631W WO2022097290A1 WO 2022097290 A1 WO2022097290 A1 WO 2022097290A1 JP 2020041631 W JP2020041631 W JP 2020041631W WO 2022097290 A1 WO2022097290 A1 WO 2022097290A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
- H04W36/142—Reselecting a network or an air interface over the same radio air interface technology
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/12—Mobility data transfer between location registers or mobility servers
Definitions
- the present invention relates to a terminal and a communication system.
- 5G or NR New Radio
- 5G wireless communication method
- 5G various wireless techniques are being studied in order to satisfy the requirement that the delay of the wireless section be 1 ms or less while achieving a throughput of 10 Gbps or more.
- 5GC 5GCoreNetwork
- EPC EvolvedPacketCore
- RAN RadioAccessNetwork
- NG-RAN Next Generation-Radio Access Network
- Non-Patent Document 1 A network architecture including NG-RAN (Next Generation-Radio Access Network) corresponding to Evolved Universal Terrestrial Radio Access Network) is being studied (for example, Non-Patent Document 1).
- the present invention has been made in view of the above points, and an object thereof is to control a network selection trigger of a user device in a roaming environment or a network to be selected.
- a receiver that receives a signaling related to SoR including at least information indicating a preferred PLMN and information indicating an opportunity to select a PLMN from a first network node in a VPLMN (Visited Public land mobile network). And a control unit that executes PLMN selection based on the information indicating the preferred PLMN and the information indicating the opportunity to select the PLMN, and the signaling related to the SoR is HPLMN (Home Public land mobile network).
- HPLMN Home Public land mobile network
- the existing technique is appropriately used in the operation of the wireless communication system according to the embodiment of the present invention.
- the existing technique is, for example, an existing LTE, but is not limited to the existing LTE.
- LTE used in the present specification has a broad meaning including LTE-Advanced, a method after LTE-Advanced (eg, NR), or a wireless LAN (Local Area Network), unless otherwise specified. Shall have.
- “configuring" the radio parameter or the like may mean that a predetermined value is set in advance (Pre-configure), or the network node 10 or The radio parameter notified from the user device 20 may be set.
- FIG. 1 is a diagram for explaining a communication system according to an embodiment of the present invention.
- the communication system is composed of a UE, which is a user device 20, and a plurality of network nodes 10.
- a UE which is a user device 20
- a plurality of network nodes 10 10
- one network node 10 corresponds to each function, but one network node 10 may realize a plurality of functions, or a plurality of network nodes 10 may realize one function. ..
- the "connection" described below may be a logical connection or a physical connection.
- the RAN Radio Access Network
- the RAN Radio Access Network
- the AMF is a network node 10 having functions such as RAN interface termination, NAS (Non-Access Stratum) termination, registration management, connection management, reachability management, and mobility management.
- the UPF is a network node 10 having functions such as a PDU (Protocol Data Unit) session point to the outside interconnected with a DN (Data Network), packet routing and forwarding, and user plane QoS (Quality of Service) handling.
- UPF and DN constitute a network slice.
- a plurality of network slices may be constructed.
- AMF includes UE, RAN, SMF (Session Management function), NSSF (Network Slice Selection Function), NEF (Network Exposure Function), NRF (Network Repository Function), AUSF (Authentication Server Function), PCF (Policy Control Function), It is connected to AF (Application Function), UDM (Unified Data Management), and SEPP (Security Edge Protection Proxy).
- AMF, SMF, NSSF, NEF, NRF, AUSF, PCF, AF, UDM are interconnected via their respective service-based interfaces, Namf, Nsmf, Nnssf, Nnef, Nnrf, Nausf, Npcf, Naf, Node. Network node 10.
- the SMF is a network node 10 having functions such as session management, UE IP (Internet Protocol) address allocation and management, DHCP (Dynamic Host Configuration Protocol) function, ARP (Address Resolution Protocol) proxy, and roaming function.
- the NEF is a network node 10 having a function of notifying other NFs (Network Functions) of capabilities and events.
- the NSSF is a network node 10 having functions such as selecting a network slice to be connected to the UE, determining an allowed NSSAI (Network Slice Selection Assistance Information), determining an NSSAI to be set, and determining an AMF set to be connected to the UE. be.
- the PCF is a network node 10 having a function of controlling network policy.
- AF is a network node 10 having a function of controlling an application server.
- the UDM is a network node 10 having a function of generating authentication information, identifying a user, restricting access during roaming based on subscriber data, and the like.
- SEPP is an opaque proxy that filters control plane messages between PLMNs (Public land mobile networks).
- the vSEPP shown in FIG. 1 is the SEPP in the visited network, and the hSEPP is the SEPP in the home network.
- UDM can acquire information necessary for steering via SOR-AF (Steering of Roaming application function) and Nsoraf. Further, SOR-AF can encrypt the steering information notified to the UE via SP-AF (Secured Packet Application Function) and Nspaf.
- SOR-AF Steering of Roaming application function
- SP-AF Secured Packet Application Function
- the UE is in a roaming environment connected to the RAN and AMF in the VPLMN (Visited PLMN).
- VPLMN and HPLMN are connected via vSEPP and hSEPP.
- the UE can communicate with the UDM of the HPLMN via, for example, the AMF of the VPLMN.
- FIG. 2 is a diagram for explaining an example (1) of the SoR processing method.
- a SoR (Steering of Roaming) function for instructing a PLMN in which a home operator is located to a roaming user in LTE will be described.
- the UE selects the PLMN according to the priority PLMN list (EF_OPLMNwAcT) recorded in the USIM (Universal Subscriber Identity Module).
- EF_OPLMNwAcT priority PLMN list
- USIM Universal Subscriber Identity Module
- SMS Short Message Service
- HSS Home Subscriber Server
- SMSC SMS Center
- the UE receives the message via the network (CoreNW), it controls the PLMN that should be preferentially located in the area.
- FIG. 3 is a diagram for explaining an example (2) of the SoR processing method.
- the SoR processing method shown in FIG. 2 cannot provide the SoR function to a terminal that does not support SMS (for example, a module terminal or the like). Moreover, since no response (ACK) is returned from the terminal, the distribution source network node cannot recognize that the rewriting is completed.
- SMS for example, a module terminal or the like
- the SoR function is realized by rewriting the PLMN list of the UE by NAS (NonAccessStratum) signaling.
- NAS NonAccessStratum
- the priority PLMN which is the SoR information is transmitted from the UDM in the HPLMN to the AMF in the VPLMN.
- the UDM may acquire the priority PLMN information from the SOR-AF.
- SOR-AF can determine the priority business operator in consideration of various conditions such as the current number of people in the area and the amount of usage. Further, SOR-AF may cause SP-AF to convert it into a encrypted message that can be deciphered by the UE.
- the AMF transmits the priority PLMN received from the UDM to the UE via NAS signaling.
- the UE Upon receiving the preferred PLMN, the UE sends an ACK to the AMF.
- the network search operates, so that the call during communication is disconnected. Whether the call should be disconnected and the PLMN selection should be performed immediately or the communication should be waited for and then the PLMN selection should be performed depends on the implementation of the UE. Therefore, it is not possible to start the PLMN selection according to the call type during communication or the policy of the business operator. As an example in which the PLMN selection start processing according to the call type during communication is required, when the call type during communication is a voice call, disconnection should be avoided because it has a large effect on the user. Further, for example, when the call type during communication is data communication, the call type should be disconnected and immediately placed in the priority PLMN.
- the PLMN selection is performed immediately after the emergency call, the call back from the emergency call receiving organization will not be received, so it is better to avoid starting the PLMN selection immediately after the emergency call.
- FIG. 4 is a diagram for explaining an example (1) of the SoR processing method according to the embodiment of the present invention.
- the UDM in the HPLMN transmits information indicating the priority PLMN and the PLMN selection trigger, which are SoR information, to the AMF in the VPLMN. Subsequently, the AMF transmits the information instructing the priority PLMN and the PLMN selection trigger received from the UDM to the UE via NAS signaling. Upon receiving the information indicating the priority PLMN and the PLMN selection trigger, the UE transmits an ACK to the AMF.
- the information indicating the trigger for selecting the PLMN may be, for example, 1) 2) 3) below.
- Timer value After receiving the SoR information, the UE performs PLMN selection after the timer expires.
- a flag indicating whether to allow PLMN selection during communication If the flag indicates "allow”, the UE disconnects and performs a PLMN selection. If the flag indicates "not allowed”, the UE waits until the communication ends, transitions to the idle state, and then performs PLMN selection.
- Table 1 is an example of information and UE operation set for each call type.
- the timer value T is 10 sec
- the flag is 0, that is, PLMN selection during communication is not permitted
- the UE is set. If it is idle 10 seconds after receiving the SoR information, PLMN selection is performed, and if it is during a voice call, PLMN selection is waited until it becomes idle.
- the UE receives SoR information in the call type "emergency call". If it is idle after 60 minutes, PLMN selection is performed, and if it is during an emergency call, PLMN selection is waited until it becomes idle. Further, as another example, when the SoR information is received during the call type "emergency call", the UE may activate the timer at the end of the emergency call. That is, the UE may perform PLMN selection if it is in an idle state when the timer expires 60 minutes after the emergency call is terminated.
- the timer value in 1) above may be set, and the flag may not be set. If communication is in progress when the timer expires, the communication may be uniformly disconnected and PLMN selection may be performed. Further, the implementation of PLMN selection may be waited until the idle state is reached, or the implementation may be such that the terminal determines which operation is to be performed for each call type.
- the UE When the UE receives the SoR information, it immediately performs PLMN selection if communication is not in progress. If the UE is communicating when it receives the SoR information, it immediately performs PLMN selection based on the flag, or waits for PLMN selection until the communication is completed.
- the call type may be other than the call type shown in Table 1.
- the call type may be SMS.
- the call type may be specified for each application of Internet communication.
- the call type may be specified for each APN (Access Point Name) or DNN (Data Network Name) of the connection destination.
- APN Access Point Name
- DNN Data Network Name
- FIG. 5 is a diagram for explaining an example (2) of the SoR processing method according to the embodiment of the present invention.
- the timing at which the UE performs PLMN selection based on the call type during communication is controlled.
- the network determines the call type during communication and sets the timer value in 1) above or the flag in 2) above.
- the UDM in the HPLMN recognizes the call type during communication, and sets an appropriate timer value or a flag indicating whether or not the PLMN selection during communication is permitted.
- step 1 the UDM in the HPLMN transmits the priority PLMN which is the SoR information to the AMF in the VPLMN.
- step 2 the AMF transmits a notification regarding the state of communication to the UDM.
- step 3 the UDM determines the timing for executing the PLMN selection based on the received notification regarding the communication status, and transmits the notification of the timing for executing the PLMN selection to the AMF.
- the notification of the timing for executing the PLMN selection corresponds to the information indicating the PLMN selection trigger.
- step 4 the AMF transmits the information instructing the priority PLMN and the PLMN selection trigger received from the UDM to the UE via NAS signaling.
- step 5 when the UE receives the information indicating the priority PLMN and the PLMN selection trigger, the UE transmits an ACK to the AMF.
- FIG. 6 is a diagram for explaining an example (3-1) of the SoR processing method according to the embodiment of the present invention.
- the AMF in the VPLMN transmits information indicating that the emergency call is in progress to the UDM in the HPLMN.
- step 1 the UDM in the HPLMN transmits a notification of the timing for executing the priority PLMN and the PLMN selection, which are SoR information, to the AMF in the VPLMN.
- the UDM determines the timing at which the PLMN selection is performed based on the notification regarding the communication state that has already been received.
- the notification of the timing for executing the PLMN selection corresponds to the information indicating the PLMN selection trigger.
- step 2 the AMF transmits the information instructing the priority PLMN and the PLMN selection trigger received from the UDM to the UE via NAS signaling.
- step 3 when the UE receives the information indicating the priority PLMN and the PLMN selection trigger, the UE transmits an ACK to the AMF.
- FIG. 8 is a diagram for explaining an example (4) of the SoR processing method according to the embodiment of the present invention.
- the network determines the type of call being communicated, and sets the timer value in 1) above or the flag in 2) above.
- the AMF in the VPLMN recognizes the call type during communication, and sets an appropriate timer value or a flag indicating whether to allow PLMN selection during communication.
- the AMF in the VPLMN may determine the call type during communication and determine the PLMN selection trigger.
- the AMF transmits the priority PLMN received from the UDM and the information indicating the PLMN selection trigger determined by the AMF to the UE via NAS signaling. Subsequently, when the UE receives the information indicating the priority PLMN and the PLMN selection trigger, the UE transmits an ACK to the AMF.
- FIG. 9 is a diagram for explaining an example (5) of the SoR processing method according to the embodiment of the present invention.
- the operation as a communication system and the processing inside the UE will be described.
- the communication system for notifying the UE of the information indicating the PLMN selection trigger is realized.
- the communication system realizes a) b) c) below.
- the network notifies the UE of the information related to the PLMN selection trigger in each communication state, and determines whether or not the UE implements the PLMN selection.
- the AMF in the VPLMN notifies the UDM in the HPLMN of the communication status, and the UDM instructs the UE to trigger an appropriate PLMN selection.
- the AMF in the roaming destination network for example VPLMN, instructs the UE to select an appropriate PLMN selection trigger based on the communication state.
- the operation of the functional unit in the UE will be described below.
- the HW (Hardware) corresponds to the transmission unit 210 or the reception unit 220.
- the communication control unit, OS (Operating System) or APL (Application) corresponds to the control unit 240.
- the HW receives the NAS signaling and transmits it to the communication control unit.
- the communication control unit activates the timer, disconnects the communication, and the like according to the information of the PLMN selection trigger (S2).
- the communication control unit transmits a network search instruction to the HW at a timing according to the information of the PLMN selection trigger (S3).
- HW performs a search (S4).
- the HW reports the found PLMN to the communication control unit (S5). Subsequently, the communication control unit performs PLMN selection based on the PLMN list (S6). Subsequently, the communication control unit transmits an instruction to attach to the selected PLMN to the HW (S7).
- FIG. 10 is a flowchart for explaining an example (6) of the SoR processing method according to the embodiment of the present invention.
- an operation such as communicating at a specific time or sending a report at a specific time every day is assumed. Therefore, by specifying the date and time and / or the cycle for executing the SoR process, the SoR process may be executed while avoiding the time when the UE targeted for the SoR is expected to execute the communication.
- the UE receives the signaling related to SoR.
- the signaling related to SoR may be NAS signaling including at least the above-mentioned priority PLMN and information indicating the PLMN selection trigger.
- the UE executes PLMN selection at a time or time zone based on the signaling related to the received SoR. That is, the signaling related to the SoR may include information specifying the time when the PLMN selection is executed as the information indicating the PLMN selection trigger. The information may specify an arbitrary time and cycle, and may be, for example, an instruction to execute PLMN selection by SoR at 13:20 every day.
- the signaling related to the SoR may include information for designating the date and time when the PLMN selection is executed as the information indicating the PLMN selection trigger.
- the information may be, for example, an instruction to execute PLMN selection by SoR at 13:20 on January 31, 2021.
- the signaling related to SoR may include information for designating a time zone and / or a period for executing PLMN selection as information for instructing the PLMN selection trigger.
- the information may be, for example, an instruction to execute PLMN selection by SoR between 1:00 and 5:00. Further, the information may be, for example, an instruction to execute PLMN selection by SoR between 1:00 and 5:00 every day.
- the signaling related to SoR may include information for designating a time zone and / or a period in which PLMN selection is not executed, as information for instructing the PLMN selection trigger.
- the information may be, for example, an instruction not to execute PLMN selection by SoR between 0:00 and 1:00 every day.
- FIG. 11 is a flowchart for explaining an example (7) of the SoR processing method according to the embodiment of the present invention.
- the UE is executing voice communication and data communication.
- the UE receives the signaling related to the SoR.
- the signaling related to SoR may be NAS signaling including at least the above-mentioned priority PLMN and information indicating the PLMN selection trigger.
- step S23 the UE does not have to execute the PLMN selection while the voice communication is continuing.
- step S24 the UE may execute the PLMN selection at the end of the voice communication even if the data communication is continuing. Further, in step S24, the UE may execute PLMN selection at the end of voice communication regardless of the execution state of data communication.
- the UE does not have to execute the PLMN selection during the voice communication based on the received information indicating the PLMN selection trigger, and the UE is continuing the voice communication according to other settings or predetermined specifications. It is not necessary to perform PLMN selection. Further, based on the received information indicating the PLMN selection trigger, the UE may execute the PLMN selection even if the data communication at the end of the voice communication is continuing, or by other settings or predetermined specifications. The UE may execute the PLMN selection even if the data communication at the end of the voice communication is continuing.
- FIG. 12 is a flowchart for explaining an example (8) of the SoR processing method according to the embodiment of the present invention.
- the UE is executing a predetermined type of data communication.
- the predetermined type of data communication may be, for example, communication related to telemedicine, communication related to V2X, or communication related to automatic communication. Further, for the data communication of a predetermined type, any type of data communication may be set.
- the UE receives the signaling related to SoR.
- the signaling related to SoR may be NAS signaling including at least the above-mentioned priority PLMN and information indicating the PLMN selection trigger.
- the information indicating the PLMN selection trigger may include information specifying a predetermined type of data communication.
- the UE does not have to execute the PLMN selection while the predetermined type of data communication continues. It should be noted that it is not necessary to execute PLMN selection while the predetermined type of data communication is continuing based on the received information indicating the PLMN selection trigger, and it is predetermined by other settings or predetermined specifications. It is not necessary to execute the PLMN selection while the data communication of the type of is continued.
- the UE may be set to a state in which PLMN selection is not executed for an arbitrary period.
- the UE may execute PLMN selection when the data communication of a predetermined type is completed.
- FIG. 13 is a flowchart for explaining an example (9) of the SoR processing method according to the embodiment of the present invention.
- the UE receives the signaling related to SoR.
- the signaling related to SoR may be NAS signaling including at least the above-mentioned priority PLMN and information indicating the PLMN selection trigger.
- the signaling related to SoR may include a list of preferred PLMNs and a list of preferred RATs. That is, the network may set a list of preferred PLMNs and a list of preferred RATs for SoR signaling. The list may consist of one entry.
- the UE may acquire the preferred PLMN list and the preferred RAT list based on the signaling related to SoR.
- the UE may first prioritize the RAT and secondly the PLMN. For example, the UE may select the other PLMN when there is no preferred RAT in the highest PLMN in the preferred PLMN list and there is a preferred RAT over the other PLMN.
- the UE may first give priority to PLMN and secondly give priority to RAT.
- FIG. 14 is a flowchart for explaining an example (10) of the SoR processing method according to the embodiment of the present invention.
- the UE receives the signaling related to SoR.
- the signaling related to SoR may be NAS signaling including at least the above-mentioned priority PLMN and information indicating the PLMN selection trigger.
- the signaling related to SoR may include a list of preferred PLMNs and a list of preferred slice types. That is, the network may set the list of preferred PLMNs and the list of preferred slice types in the signaling related to SoR. The list may consist of one entry.
- the slice type may be, for example, eMBB (enhanced Mobile Broadband), URLCC (Ultra-Reliable and Low Latency Communications), or mMTC (massive Machine Type Communications). It may be V2X or IoT.
- eMBB enhanced Mobile Broadband
- URLCC Ultra-Reliable and Low Latency Communications
- mMTC massive Machine Type Communications
- the UE may acquire the preferred PLMN list and the preferred slice type list based on the signaling related to SoR.
- the UE may first give priority to the slice type and secondly give priority to the PLMN. For example, the UE may select the other PLMN when the highest PLMN in the priority PLMN list does not have a preferred slice type and a slice type that has a priority over the other PLMN exists.
- step S53 the UE may first give priority to the PLMN and secondly give priority to the slice type.
- the type of PLMN to be specified may be NPN (Non Public Network).
- the information that can be specified in the priority PLMN list in addition to the 3GPP access specified by the information such as RAT type and PLMN ID, the information of Non-3GPP Access (for example, WLAN, WiMax (registered trademark), fixed network, etc.) is used. It may be shown.
- Non-3GPP Access for example, WLAN, WiMax (registered trademark), fixed network, etc.
- the SoR processing method shown below may be executed in the embodiment of the present invention.
- the UE receives the signaling related to the SoR.
- the signaling related to the SoR may be NAS signaling including at least the above-mentioned priority PLMN and information indicating the PLMN selection trigger.
- the signaling related to the SoR may include information regarding the ability specified by UE Network Capability or UE Radio Capability. That is, the network may set the list of preferred PLMNs and the preferred UE Network Capability or UE Radio Capability in the signaling related to the SoR. The list may consist of one entry.
- the UE may acquire the preferred PLMN list and the UE Network Capability or UE Radio Capability of the regional network based on the signaling related to the SoR. Subsequently, the UE may first give priority to UE Network Capability or UE Radio Capability, and secondly give priority to PLMN. For example, a UE does not have the ability specified by the preferred UE Network Capability or UE Radio Capability in the PLMN at the top of the preferred PLMN list, and is specified by the UE Network Capability or UE Radio Capability that takes precedence over other PLMNs. If the ability is present, the other PLMN may be selected. The UE may give priority to PLMN first and UE Network Capability or UE Radio Capability second.
- the AMF which is a network node, can notify the UE of the information related to the PLMN selection trigger, and can control in detail the timing at which the UE executes the PLMN selection. Further, the AMF, which is a network node, can notify the UE of information indicating the preferred RAT or the preferred slice type, and cause the UE to select the PLMN having the preferred RAT or the preferred slice type.
- the network node 10 and the user apparatus 20 include a function for carrying out the above-described embodiment.
- the network node 10 and the user apparatus 20 may each have only a part of the functions in the embodiment.
- FIG. 15 is a diagram showing an example of the functional configuration of the network node 10.
- the network node 10 has a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
- the functional configuration shown in FIG. 15 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be carried out.
- the network node 10 having a plurality of different functions on the system architecture may be composed of a plurality of network nodes 10 separated for each function.
- the transmission unit 110 includes a function of generating a signal to be transmitted to the user device 20 or another network node 10 and transmitting the signal by wire or wirelessly.
- the receiving unit 120 includes a function of receiving various signals transmitted from the user apparatus 20 or another network node 10 and acquiring information of, for example, a higher layer from the received signals.
- the setting unit 130 stores preset setting information and various setting information to be transmitted to the user device 20 in the storage device, and reads them out from the storage device as needed.
- the contents of the setting information are, for example, subscriber information and SoR information of the user apparatus 20.
- control unit 140 performs processing related to communication control of the user device 20 in the roaming environment. Further, the control unit 140 performs a process related to the notification of SoR information to the user device 20.
- the function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.
- FIG. 16 is a diagram showing an example of the functional configuration of the user apparatus 20.
- the user apparatus 20 includes a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.
- the functional configuration shown in FIG. 16 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be carried out.
- the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
- the receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal, reference signal and the like transmitted from the network node 10.
- the setting unit 230 stores various setting information received from the network node 10 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed.
- the setting unit 230 also stores preset setting information.
- the contents of the setting information are, for example, subscriber information, SoR information, and the like.
- control unit 240 performs processing related to communication control in a roaming environment based on SoR information. Further, the control unit 240 performs a process related to PLMN switching control at the time of receiving SoR information.
- the function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.
- each functional block (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.
- Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but limited to these I can't.
- a functional block (configuration unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
- the realization method is not particularly limited.
- the network node 10, the user device 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 17 is a diagram showing an example of the hardware configuration of the network node 10 and the user apparatus 20 according to the embodiment of the present disclosure.
- the network node 10 and the user device 20 described above are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. You may.
- the word “device” can be read as a circuit, device, unit, etc.
- the hardware configuration of the network node 10 and the user device 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
- the processor 1001 For each function in the network node 10 and the user device 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and controls the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
- the processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
- CPU Central Processing Unit
- control unit 140, control unit 240, and the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these.
- a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
- the control unit 140 of the network node 10 shown in FIG. 15 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- the control unit 240 of the user device 20 shown in FIG. 16 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- Processor 1001 may be mounted by one or more chips.
- the program may be transmitted from the network via a telecommunication line.
- the storage device 1002 is a computer-readable recording medium, and is, for example, by at least one of ROM (ReadOnlyMemory), EPROM (ErasableProgrammableROM), EEPROM (ElectricallyErasableProgrammableROM), RAM (RandomAccessMemory), and the like. It may be configured.
- the storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
- the storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.
- the auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu).
- -It may be composed of at least one of a ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like.
- the storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.
- the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the storage device 1002 is connected by the bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the network node 10 and the user device 20 are hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array).
- the hardware may be configured to include the hardware, and a part or all of each functional block may be realized by the hardware.
- processor 1001 may be implemented using at least one of these hardware.
- At least the information indicating the preferred PLMN and the information indicating the opportunity to select the PLMN are obtained from the first network node in the VPLMN (Visited Public land mobile network). It has a receiving unit for receiving the signaling related to the SoR including the control unit, and a control unit for executing the PLMN selection based on the information indicating the preferred PLMN and the information indicating the trigger for selecting the PLMN, and the signaling related to the SoR.
- VPLMN Vehicle Public land mobile network
- the AMF which is a network node, can notify the UE of information related to the PLMN selection trigger, and can control in detail the timing at which the UE executes the PLMN selection. Further, the AMF, which is a network node, can notify the UE of information indicating the preferred RAT or the preferred slice type, and cause the UE to select the PLMN having the preferred RAT or the preferred slice type. That is, it is possible to control the network selection trigger of the user apparatus in the roaming environment or the network to be selected.
- the control unit may execute the PLMN selection at a time or cycle specified by the information indicating the trigger for selecting the PLMN.
- the AMF which is a network node, can notify the UE of information related to the PLMN selection trigger, and can control in detail the timing at which the UE executes the PLMN selection. That is, the UE can execute the PLMN selection at the timing when it is assumed that the communication is not performed.
- the control unit When the control unit is executing voice communication and data communication, the control unit may not execute PLMN selection during voice communication, and may execute PLMN selection regardless of the execution state of data communication when voice communication ends. ..
- the AMF which is a network node, can notify the UE of information related to the PLMN selection trigger, and can control in detail the timing at which the UE executes the PLMN selection.
- the control unit does not have to execute PLMN selection during execution of a specific type of data communication.
- the AMF which is a network node, can notify the UE of information related to the PLMN selection trigger, and can control in detail the timing at which the UE executes the PLMN selection. That is, the UE can withhold the PLMN selection while performing important data communication that would interfere if disconnected.
- the receiving unit receives a signaling related to the SoR including information indicating a preferred RAT (Radio Access Technology) or a preferred slice type, and the control unit first receives the preferred RAT or the preferred slice.
- the PLMN selection may be executed by giving priority to the type and secondly giving priority to the preferred PLMN.
- the AMF which is a network node, can notify the UE of information indicating a preferred RAT or a preferred slice type, and allow the UE to select a PLMN having a preferred RAT or a preferred slice type.
- a communication system having a first network node in a VPLMN (Visited Public land mobile network), a second network node in an HPLMN (Home Public land mobile network), and a terminal.
- the second network node has a transmitter for transmitting a signaling related to SoR including at least information indicating a preferred PLMN and information indicating an opportunity to select a PLMN to the first network node.
- the first network node has a receiving unit that receives the signaling related to the SoR from the second network node, and a transmitting unit that transmits the signaling related to the SoR to the terminal, and the terminal is the terminal.
- Communication having a receiving unit that receives signaling related to SoR from the first network node, and a control unit that executes PLMN selection based on information indicating the preferred PLMN and information indicating an opportunity to select the PLMN. The system is provided.
- the AMF which is a network node, can notify the UE of information related to the PLMN selection trigger, and can control in detail the timing at which the UE executes the PLMN selection. Further, the AMF, which is a network node, can notify the UE of information indicating the preferred RAT or the preferred slice type, and cause the UE to select the PLMN having the preferred RAT or the preferred slice type. That is, it is possible to control the network selection trigger of the user apparatus in the roaming environment or the network to be selected.
- the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
- the processing order may be changed as long as there is no contradiction.
- the network node 10 and the user apparatus 20 have been described using a functional block diagram, but such an apparatus may be realized by hardware, software, or a combination thereof.
- the software operated by the processor of the network node 10 according to the embodiment of the present invention and the software operated by the processor of the user apparatus 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only, respectively. It may be stored in a memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
- information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. It may be carried out by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
- RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
- Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication).
- system FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize appropriate systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
- the specific operation performed by the network node 10 in the present specification may be performed by its upper node (upper node).
- various operations performed for communication with the user apparatus 20 are the network node 10 and other network nodes other than the network node 10. It is clear that it can be done by at least one (eg, MME or S-GW, etc., but not limited to these).
- MME Mobility Management Entity
- S-GW Serving GPRS Support Node
- the information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
- the input / output information and the like may be stored in a specific location (for example, a memory) or may be managed using a management table. Information to be input / output may be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
- the determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparison of numerical values (for example). , Comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.).
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.
- wireless technology infrared, microwave, etc.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- a channel and a symbol may be a signal (signaling).
- the signal may be a message.
- the component carrier CC: Component Carrier
- CC Component Carrier
- system and “network” used in this disclosure are used interchangeably.
- the information, parameters, etc. described in the present disclosure may be expressed using an absolute value, a relative value from a predetermined value, or another corresponding information. It may be represented.
- the radio resource may be one indicated by an index.
- base station Base Station
- wireless base station base station
- base station device fixed station
- NodeB nodeB
- eNodeB eNodeB
- GNB nodeB
- access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”
- Terms such as “cell group,” “carrier,” and “component carrier” may be used interchangeably.
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (eg, 3) cells. When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)). Communication services can also be provided by Remote Radio Head).
- a base station subsystem eg, a small indoor base station (RRH:)
- Communication services can also be provided by Remote Radio Head).
- the term "cell” or “sector” refers to a portion or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage. Point to.
- MS Mobile Station
- UE User Equipment
- Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on the mobile body, a mobile body itself, or the like.
- the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read by the user terminal.
- the communication between the base station and the user terminal is replaced with the communication between a plurality of user devices 20 (for example, it may be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the user apparatus 20 may have the functions of the network node 10 described above.
- words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
- the upstream channel, the downstream channel, and the like may be read as a side channel.
- the user terminal in the present disclosure may be read as a base station.
- the base station may have the functions of the above-mentioned user terminal.
- determining and “determining” used in this disclosure may include a wide variety of actions.
- “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). It may include (eg, searching in a table, database or another data structure), ascertaining as “judgment” or “decision”.
- judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include (for example, accessing data in memory) to be regarded as “judgment” or “decision”.
- judgment and “decision” are considered to be “judgment” and “decision” when the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming", “expecting”, “considering” and the like.
- connection means any direct or indirect connection or connection between two or more elements and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
- the connection or connection between the elements may be physical, logical, or a combination thereof.
- connection may be read as "access”.
- the two elements use at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-comprehensive examples, the radio frequency region.
- Electromagnetic energies with wavelengths in the microwave and light (both visible and invisible) regions, etc. can be considered to be “connected” or “coupled” to each other.
- the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applied standard.
- RS Reference Signal
- Pilot Pilot
- references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.
- each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
- the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
- AMF in the present disclosure is an example of a first network node.
- UDM is an example of a second network node.
- Network node 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 User device 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device
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Abstract
Description
図1に示されるように、通信システムは、ユーザ装置20であるUE、複数のネットワークノード10から構成される。以下、機能ごとに1つのネットワークノード10が対応するものとするが、複数の機能を1つのネットワークノード10が実現してもよいし、複数のネットワークノード10が1つの機能を実現してもよい。また、以下に記載する「接続」は、論理的な接続であってもよいし、物理的な接続であってもよい。
a)ネットワークが、各通信状態におけるPLMN選択契機に係る情報をUEに通知し、UEがPLMN選択を実施するか否かを判断する。
b)HPLMNにおけるUDMに、VPLMNにおけるAMFは通信状態を通知して、UDMが適切なPLMN選択契機をUEに指示する。
c)ローミング先ネットワーク、例えばVPLMNにおけるAMFが通信状態に基づいて、適切なPLMN選択契機をUEに指示する。
次に、これまでに説明した処理及び動作を実施するネットワークノード10及びユーザ装置20の機能構成例を説明する。ネットワークノード10及びユーザ装置20は上述した実施例を実施する機能を含む。ただし、ネットワークノード10及びユーザ装置20はそれぞれ、実施例の中の一部の機能のみを備えることとしてもよい。
図15は、ネットワークノード10の機能構成の一例を示す図である。図15に示されるように、ネットワークノード10は、送信部110と、受信部120と、設定部130と、制御部140とを有する。図15に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実施できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。また、システムアーキテクチャ上で複数の異なる機能を有するネットワークノード10は、機能ごとに分離された複数のネットワークノード10から構成されてもよい。
図16は、ユーザ装置20の機能構成の一例を示す図である。図16に示されるように、ユーザ装置20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図16に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実施できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
上記実施形態の説明に用いたブロック図(図15及び図16)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
以上、説明したように、本発明の実施の形態によれば、VPLMN(Visited Public land mobile network)における第1のネットワークノードから、優先するPLMNを示す情報及びPLMNを選択する契機を示す情報を少なくとも含むSoRに係るシグナリングを受信する受信部と、前記優先するPLMNを示す情報及び前記PLMNを選択する契機を示す情報に基づいて、PLMN選択を実行する制御部とを有し、前記SoRに係るシグナリングは、HPLMN(Home Public land mobile network)における第2のネットワークノードが作成する端末が提供される。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、ネットワークノード10及びユーザ装置20は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従ってネットワークノード10が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従ってユーザ装置20が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
110 送信部
120 受信部
130 設定部
140 制御部
20 ユーザ装置
210 送信部
220 受信部
230 設定部
240 制御部
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
Claims (6)
- VPLMN(Visited Public land mobile network)における第1のネットワークノードから、優先するPLMNを示す情報及びPLMNを選択する契機を示す情報を少なくとも含むSoRに係るシグナリングを受信する受信部と、
前記優先するPLMNを示す情報及び前記PLMNを選択する契機を示す情報に基づいて、PLMN選択を実行する制御部とを有し、
前記SoRに係るシグナリングは、HPLMN(Home Public land mobile network)における第2のネットワークノードが作成する端末。 - 前記制御部は、前記PLMNを選択する契機を示す情報が指定する時刻又は周期で、PLMN選択を実行する請求項1記載の端末。
- 前記制御部は、音声通信及びデータ通信を実行している場合、音声通信中はPLMN選択を実行せず、音声通信が終了したときデータ通信の実行状態によらずPLMN選択を実行する請求項1記載の端末。
- 前記制御部は、特定の種別のデータ通信実行中にPLMN選択を実行しない請求項1記載の端末。
- 前記受信部は、優先するRAT(Radio Access Technology)又は優先するスライス種別を示す情報をさらに含む前記SoRに係るシグナリングを受信し、
前記制御部は、第1に前記優先するRAT又は前記優先するスライス種別を優先し、第2に前記優先するPLMNを優先して、PLMN選択を実行する請求項1記載の端末。 - VPLMN(Visited Public land mobile network)における第1のネットワークノードと、HPLMN(Home Public land mobile network)における第2のネットワークノードと、端末とを有する通信システムであって、
前記第2のネットワークノードは、
優先するPLMNを示す情報及びPLMNを選択する契機を示す情報を少なくとも含むSoRに係るシグナリングを前記第1のネットワークノードに送信する送信部を有し、
前記第1のネットワークノードは、
前記SoRに係るシグナリングを前記第2のネットワークノードから受信する受信部と、
前記SoRに係るシグナリングを前記端末に送信する送信部とを有し、
前記端末は、前記SoRに係るシグナリングを前記第1のネットワークノードから受信する受信部と、
前記優先するPLMNを示す情報及び前記PLMNを選択する契機を示す情報に基づいて、PLMN選択を実行する制御部とを有する通信システム。
Priority Applications (4)
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US9525995B2 (en) * | 2015-05-05 | 2016-12-20 | Apple Inc. | Mobile device with improved network selection while roaming |
CN108293225B (zh) * | 2015-11-19 | 2021-11-02 | Sk电信有限公司 | 用于在移动通信系统中选择核心网络的方法和设备 |
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US10911934B2 (en) * | 2017-07-18 | 2021-02-02 | Samsung Electronics Co., Ltd. | Method and system to detect anti-steering of roaming activity in wireless communication network |
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NTT DOCOMO: "Clarification of a steering of roaming requirement", 3GPP DRAFT; S1-204187, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. SA WG1, no. Electronic Meeting; 20201110 - 20201119, 3 November 2020 (2020-11-03), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051950509 * |
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