WO2024209652A1 - 端末、及び通信方法 - Google Patents
端末、及び通信方法 Download PDFInfo
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- WO2024209652A1 WO2024209652A1 PCT/JP2023/014306 JP2023014306W WO2024209652A1 WO 2024209652 A1 WO2024209652 A1 WO 2024209652A1 JP 2023014306 W JP2023014306 W JP 2023014306W WO 2024209652 A1 WO2024209652 A1 WO 2024209652A1
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- slice
- terminal
- network
- information
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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
- H04W28/08—Load balancing or load distribution
- H04W28/084—Load balancing or load distribution among network function virtualisation [NFV] entities; among edge computing entities, e.g. multi-access edge computing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Definitions
- the present invention relates to a terminal and a communication method in a wireless communication system.
- 5G Fifth Generation Partnership Project
- 5G New Radio
- 5G various wireless technologies are being considered to meet the requirements of achieving a throughput of 10 Gbps or more while keeping latency in wireless sections to 1 ms or less.
- NR has introduced a network architecture including 5GC (5G Core Network), which corresponds to EPC (Evolved Packet Core), the core network in the network architecture of LTE (Long Term Evolution), and NG-RAN (Next Generation-Radio Access Network), which corresponds to E-UTRAN (Evolved Universal Terrestrial Radio Access Network), the RAN (Radio Access Network) in the network architecture of LTE (for example, non-patent document 1).
- 5GC 5G Core Network
- EPC Evolved Packet Core
- LTE Long Term Evolution
- NG-RAN Next Generation-Radio Access Network
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- RAN Radio Access Network
- HPLMN Home Public Land Mobile Networks
- VPLMN Vehicle Land Mobile Networks
- Slice-based SOR is a mechanism that allows a terminal to select a VPLMN to connect to at a roaming destination based on the slices supported by each VPLMN at the roaming destination.
- the terminal 20 transitions to a VPLMN that supports a desired slice using slice-based SOR, it may not be able to connect to the desired slice depending on the network conditions, etc. If the terminal 20 cannot connect to the desired slice, unnecessary repeated transitions between VPLMNs may occur.
- the present invention has been made in consideration of the above points, and aims to provide a technology for suppressing unnecessary repetition of transitions between networks in a technology for performing network transitions so that a terminal can use a desired slice.
- a receiving unit that receives correspondence information indicating correspondence between slices and networks
- a terminal which includes a control unit that, when a specific slice cannot be used in a specific network determined based on the correspondence information, stores a combination of information indicating the specific network and information indicating the specific slice in a memory unit.
- the disclosed technology provides a technology for suppressing unnecessary repetition of transitions between networks in a technology for a terminal to perform network transitions in order to use a desired slice.
- FIG. 1 is a diagram illustrating an example of a communication system.
- FIG. 1 is a diagram for explaining an example of a communication system in a roaming environment. This is a diagram to explain an example of operation based on slice-based SOR.
- FIG. 11 is a diagram showing an example of information notified to the terminal 20.
- FIG. 11 is a diagram showing an example of information notified to the terminal 20.
- 13 is a flowchart of a process executed by the terminal 20. This is a sequence diagram showing a method of notifying slice-based SOR information. A sequence diagram showing an example of operation when a slice connection is not possible.
- FIG. 2 is a diagram illustrating an example of a functional configuration of a network node device 30 according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an example of a hardware configuration of an apparatus according to an embodiment of the present invention.
- 1 is a diagram showing an example of a configuration of a vehicle according to an embodiment of the present invention.
- existing technologies are used as appropriate.
- the existing technologies are, for example, existing LTE or existing NR (5G), but are not limited to existing LTE or existing NR.
- all message names used in the following explanations are examples.
- all network node device names used in the following explanations are examples.
- Fig. 1 is a diagram for explaining an example of a communication system.
- the communication system is composed of a UE, which is a terminal 20, and multiple network node devices.
- a UE which is a terminal 20
- multiple network node devices it is assumed that one network node device corresponds to each function, but multiple functions may be realized by one network node device, or multiple network node devices may realize one function.
- the "connection" described below may be a logical connection or a physical connection.
- RAN Radio Access Network
- AMF Access and Mobility Management Function
- UPF User plane function
- AMF Access and Mobility Management Function
- UPF User plane function
- AMF is a network node device having functions such as RAN interface termination, NAS (Non-Access Stratum) termination, registration management, connection management, reachability management, mobility management, etc.
- UPF is a network node device having functions such as PDU (Protocol Data Unit) session point to the outside that interconnects with DN (Data Network), packet routing and forwarding, and user plane QoS (Quality of Service) handling.
- PDU Protocol Data Unit
- DN Data Network
- the AMF is connected to the UE, RAN, SMF (Session Management function), NSSF (Network Slice Selection Function), NEF (Network Exposure Function), NRF (Network Repository Function), UDM (Unified Data Management), UDR (Unified Data Repository), AUSF (Authentication Server Function), PCF (Policy Control Function), and AF (Application Function).
- the AMF, SMF, NSSF, NEF, NRF, UDM, UDR, AUSF, PCF, and AF are network node devices that are interconnected via interfaces based on their respective services: Namf, Nsmf, Nnssf, Nnef, Nnrf, Nudm, Nudr, Nausf, Npcf, and Naf.
- the SMF is a network node device having functions such as session management, IP (Internet Protocol) address allocation and management for UEs, DHCP (Dynamic Host Configuration Protocol) function, ARP (Address Resolution Protocol) proxy, and roaming function.
- the NEF is a network node device having a function of notifying other NFs (Network Functions) of capabilities and events.
- the NSSF is a network node device having functions such as selecting the network slice to which the UE connects, determining the allowed NSSAI (Network Slice Selection Assistance Information), determining the NSSAI to be set, and determining the AMF set to which the UE connects.
- the PCF is a network node device having a function of controlling network policies.
- the AF is a network node device having a function of controlling application servers.
- the NRF is a network node device having a function of discovering NF instances that provide services.
- the UDM is a network node device that manages subscriber data, authentication data, etc. The UDM also stores (manages) dynamic information according to the connection status of the terminal 20, etc.
- the UDM is connected to a UDR (User Data Repository) that holds data.
- FIG. 2 is a diagram for explaining an example of a communication system in a roaming environment.
- the network is composed of a UE, which is a terminal 20, and multiple network node devices.
- the RAN is a network node device with radio access functions, and is connected to the UE, AMF, and UPF.
- the AMF is a network node device with functions such as RAN interface termination, NAS termination, registration management, connection management, reachability management, and mobility management.
- the UPF is a network node device with functions such as a PDU session point to the outside that interconnects with the DN, packet routing and forwarding, and user plane QoS handling.
- the UPF and DN constitute a network slice. In the wireless communication network in the embodiment of the present invention, multiple network slices are constructed.
- the AMF is connected to the UE, RAN, SMF, NSSF, NEF, NRF, UDM, AUSF, PCF, AF, and SEPP (Security Edge Protection Proxy).
- the AMF, SMF, NSSF, NEF, NRF, UDM, AUSF, PCF, and AF are network node devices that are interconnected via interfaces based on their respective services: Namf, Nsmf, Nnssf, Nnef, Nnrf, Nudm, Nausf, Npcf, and Naf.
- the SMF is a network node device having functions such as session management, UE IP address allocation and management, DHCP function, ARP proxy, and roaming function.
- the NEF is a network node device having a function of notifying other NFs of capabilities and events.
- the NSSF is a network node device having functions such as selecting a network slice to which a UE connects, determining an allowed NSSAI, determining an NSSAI to be set, and determining an AMF set to which a UE connects.
- the PCF is a network node device having a function of performing network policy control.
- the AF is a network node device having a function of controlling application servers.
- the NRF is a network node device having a function of discovering NF instances that provide services.
- the SEPP is a non-transparent proxy that filters control plane messages between PLMNs (Public Land Mobile Networks).
- the vSEPP shown in Figure 2 is a SEPP in the visited network
- the UE is in a roaming environment connected to the RAN and AMF in the VPLMN (Visited PLMN).
- the VPLMN and the HPLMN (Home PLMN) are connected via vSEPP and hSEPP.
- the UE can communicate with the UDM of the HPLMN, for example, via the AMF of the VPLMN.
- a terminal 20 subscribes to a network of a home operator (HPLMN: Home Public Land Mobile Network), the network of the operator in which the terminal 20 roams is located is called a Visited PLMN (VPLMN).
- HPLMN Home Public Land Mobile Network
- VPLMN Visited PLMN
- Slice-based SOR Step of Roaming
- terminal 20 has roamed from HPLMN50, which is the home operator's network, and is connected to VPLMN1, which is the roaming destination network.
- terminal 20 receives and retains information from HPLMN50 indicating that "VPLMN2 supports slice A, and VPLMN1 does not support slice A.”
- terminal 20 connected to VPLMN1 launches application X that uses slice A, for example, it determines that it is necessary to use slice A and, based on the above information, decides to change (transition) its connection destination from VPLMN1, which does not support slice A, to VPLMN2, which supports slice A. In accordance with this decision, terminal 20 disconnects from VPLMN1 and connects to VPLMN2.
- Figure 3 shows location registration, which is part of the connection process.
- the above transition operation allows terminal 20 to use slice A to receive services provided by application X.
- Non-Patent Document 3 states that "For a roaming UE activating a service/application requiring a network slice not offered by the serving network but available in the area from other network(s), the HPLMN shall be able to provide the UE with prioritization information of the VPLMNs with which the UE may register for the network slice.”
- the operation shown in Figure 3 is an example of an operation based on the contents of this description.
- 3GPP proposes, for example, notifying the terminal 20 of the following information from the NW (network) (C1-230543, C1-230455, etc.).
- NW network
- S-NSSAI is a slice identifier.
- VPLMN e.g. VPLMN 2
- the currently serving VPLMN e.g. VPLMN 2
- VPLMN 1 which has the highest priority, will be selected from among the VPLMNs that support slice 1.
- slice-based SOR (Regarding the issues) When slice-based SOR is applied, for example, the following operations are performed.
- terminal 20 connected to VPLMN-A wishes to use slice 1 at a certain point in time, but VPLMN-A does not support slice 1 and it is known that another VPLMN-B supports slice 1, terminal 20 transitions from VPLMN-A to VPLMN-B.
- terminal 20 may repeatedly make unnecessary transitions between VPLMN-A and VPLMN-B.
- unnecessary transitions between VPLMNs may be repeatedly made in terminal 20.
- terminal 20 when terminal 20 applies slice-based SOR and fails to connect to a desired slice (say slice 1) in a certain VPLMN (say VPLMN-A), or when it determines that it is not possible to connect to slice 1 based on information received from the network, etc., terminal 20 stores a pair of identification information for slice 1 and identification information for VPLMN-A in a memory unit of terminal 20.
- the terminal 20 when the terminal 20 wants to use slice 1 with Slice based SoR, it refers to the information of the pair stored in the memory unit and lowers the priority of VPLMN-A stored in combination with slice 1 as a target for operator selection by Slice based SoR, or excludes VPLMN-A from the selection targets.
- the terminal 20 may store the pair of VPLMN-A and slice 1 as a Rejected NSSAI (identifier of the slice that is rejected for use), which is a parameter used in the existing specifications (Non-Patent Document 1), or may store it as information that is not specified in the existing specifications.
- a Rejected NSSAI identifier of the slice that is rejected for use
- Non-Patent Document 1 a parameter used in the existing specifications
- the terminal 20 may start a timer associated with the pair, and when the timer expires, the terminal 20 may delete the pair from the list. By deleting the pair from the list, the priority of the VPLMN with respect to the slice in the pair returns to the state before the pair was saved.
- the terminal 20 may apply the slice base SoR again to transition to the VPLMN in the group and connect to the slice in the group.
- timer timer value
- HPLMN 50 may be notified, for example, from HPLMN 50 to terminal 20 together with slice-based SOR information (e.g., FIG. 4).
- FIG. 5 An example of slice-based SOR information including a timer value is shown in FIG. 5.
- terminal 20 deletes the pair (slice 1, VPLMN 1) from the list 60 seconds after adding the pair (slice 1, VPLMN 1) to the list.
- ⁇ Processing flow> The flow of the process executed by the terminal 20 will be described with reference to the flowchart in Fig. 6. As a premise of the flow, it is assumed that the terminal 20 holds, as slice based SoR information, information on slices supported for each VPLMN (referred to as slice support information) and a timer value for each pair of slice and VPLMN (e.g., Fig. 5).
- slice support information information on slices supported for each VPLMN
- a timer value for each pair of slice and VPLMN e.g., Fig. 5
- the terminal 20 starts a certain application (called application X).
- application X a certain application
- the terminal 20 determines that a certain slice (called slice 2) should be used for application X.
- slice 2 a certain slice
- the URSP rule described in Non-Patent Document 4 can be used.
- the URSP rule is a rule that describes which slice should be used for each traffic (application) of the terminal 20.
- the terminal 20 determines whether or not slice 2 is supported in the currently connected VPLMN-A based on the slice support information. If slice 2 is supported in the currently connected VPLMN-A (Yes in S102), the terminal 20 continues the current connection to VPLMN-A (terminating the processing related to Slice-based SoR).
- terminal 20 decides to execute slice-based SoR (transition to VPLMN-B that supports slice 2), transitions to VPLMN-B, and attempts to connect to slice 2.
- slice-based SoR transition to VPLMN-B that supports slice 2
- connection to slice 2 is successful (Yes in S104), the connection continues and processing related to Slice-based SoR ends.
- the terminal 20 executes the above-mentioned process. That is, in S105, the terminal 20 adds the pair (slice 2, VPLMN-B) to the list, lowers the priority of VPLMN-B for slice 2, and starts the timer corresponding to the pair (slice 2, VPLMN-B).
- the terminal 20 may perform the process of S105 above and transition from VPLMN-B to the original VPLMN-A.
- terminal 20 desires to connect to slice 2, it transitions to a VPLMN with a higher priority than VPLMN-B and attempts to connect to slice 2 (S103, S104). If the connection to slice 2 is successful, the processing related to slice-based SoR is terminated. Also, if the timer corresponding to the pair (slice 2, VPLMN-B) expires, (slice 2, VPLMN-B) is deleted from the list.
- the terminal 20 deletes (slice 2, VPLMN-B) from the list when the timer corresponding to the pair (slice 2, VPLMN-B) expires. This returns the priority of VPLMN-B to its initial state.
- the terminal 20 can transition to VPLMN-B based on the slice-based SoR and connect to slice 2.
- Processing sequence example 1 An example of a sequence for notifying information used in slice-based SOR (e.g., Figs. 4 and 5) will be described with reference to Fig. 7. This information will be referred to as "Slice-based SOR information" here.
- Slice based SoR information (such as information on slices supported by each VPLMN) can be notified from the NW to the terminal 20, for example, in a Registration Accept in the sequence shown in Figure C.2.1 of non-patent document 2 (3GPP TS 23.122) or in a DL NAS TRANSPORT in the sequence shown in Figure C.3.1 of the same non-patent document 2.
- HPLMN50 in FIG. 7 is a network node device (e.g., UDM) in HPLMN50
- VPLMN60 is more specifically a network node device (e.g., AMF) in VPLMN60.
- UDM network node device
- AMF network node device
- terminal 20 sends a Registration Request to VPLMN 60.
- VPLMN 60 acquires Slice based SoR information from HPLMN 50.
- Slice based SoR information may not be acquired here, but may be acquired in S306.
- VPLMN 60 If VPLMN 60 acquires Slice based SoR information in S203, VPLMN 60 notifies terminal 20 of the Slice based SoR information together with Registration Accept in S204.
- the VPLMN 60 acquires the Slice based SoR information from the HPLMN 50.
- the VPLMN 60 notifies the terminal 20 of the Slice based SoR information via DL NAS TRANSPORT.
- HPLMN50 in FIG. 8 is a network node device (e.g., UDM) in HPLMN50, and VPLMN-A (60A) and VPLMN-B (60B) are more specifically network node devices (e.g., AMF) in their respective VPLMNs.
- UDM network node device
- VPLMN-A and VPLMN-B 60B
- AMF network node devices
- terminal 20 sends a Registration Request to VPLMN-A (60A).
- terminal 20 receives Slice based SoR information from VPLMN-A (60A). Registration is completed through S305 and S306.
- the terminal 20 understands from the received Slice based SoR information that VPLMN-A (60A) supports only slice 1, and that if slice 2 is to be used, transition to VPLMN-B (60B) is required.
- terminal 20 requests a connection to slice 2.
- terminal 20 transmits a Registration Request to VPLMN-B (60B).
- This Registration Request includes, for example, information indicating that a connection to slice 2 is requested.
- terminal 20 receives a Registration Accept from VPLMN-B (60B) that includes information indicating that connection to slice 2 is not possible.
- the Registration Accept notifies the terminal 20 of "information indicating that a connection to slice 2 is not possible.”
- the terminal 20 may attempt to connect to slice 2 and, based on the fact that the connection is not possible, determine that a connection to slice 2 is not possible.
- terminal 20 performs the same process as in S105 described above. That is, when terminal 20 determines that slice 2 cannot be used with VPLMN-B (60B), it saves the combination of (slice 2, VPLMN-B) in the memory unit. Thereafter, terminal 20 will not select VPLMN-B (60B) in the operation of Slice based SoR, even if it wishes to use slice 2. After a certain period of time has elapsed, terminal 20 deletes the combination of (slice 2, VPLMN-B) from the list.
- Network Node Device 30> 9 is a diagram illustrating an example of a functional configuration of the network node device 30.
- the network node device 30 may be any of the network node devices of the RAN (base station 10), the AMF, the SMF, the UPF, and the UDM, or may be a network node device other than these.
- the network node device 30 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140.
- the functional configuration shown in FIG. 9 is merely an example.
- the names of the functional divisions and functional units may be any as long as they can perform the operations related to the embodiment of the present invention.
- the transmitting unit 120 generates information to be transmitted to the terminal 20 or other network node devices, and transmits the information by wire or wirelessly.
- the receiving unit 120 receives various types of information transmitted from the terminal 20 or other network node devices.
- the setting unit 130 stores various setting information in a storage device and reads it from the storage device as needed.
- the control unit 140 controls the entire device.
- the functional units in the control unit 140 related to information transmission may be included in the transmission unit 110, and the functional units in the control unit 140 related to information reception may be included in the reception unit 120.
- the transmission unit 110 may be called a transmitter, and the reception unit 120 may be called a receiver.
- Fig. 10 is a diagram showing an example of the functional configuration of the terminal 20.
- the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
- the functional configuration shown in Fig. 10 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any.
- the transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.
- the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
- the receiver 220 receives various signals wirelessly and obtains higher layer signals from the received physical layer signals.
- the receiver 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, DCI via PDCCH, data via PDSCH, etc. transmitted from the base station. Both the transmitter 210 and the receiver 220 are also capable of communicating with the network node device 30.
- the transmitting unit 210 may transmit a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), or the like to another terminal 20 as D2D communication, and the receiving unit 220 may receive a PSCCH, a PSSCH, a PSDCH, or a PSBCH, or the like, from the other terminal 20.
- a PSCCH Physical Sidelink Control Channel
- PSSCH Physical Sidelink Shared Channel
- PSDCH Physical Sidelink Discovery Channel
- PSBCH Physical Sidelink Broadcast Channel
- the setting unit 230 stores various setting information received from the base station 10 or other terminals by the receiving unit 220 in a storage device provided in the setting unit 230, and reads it from the storage device as necessary.
- the setting unit 230 also stores setting information that is set in advance.
- the control unit 240 controls the terminal 20.
- the functional units in the control unit 240 related to signal transmission may be included in the transmission unit 210, and the functional units in the control unit 240 related to signal reception may be included in the reception unit 220.
- the transmission unit 210 may be called a transmitter, and the reception unit 220 may be called a receiver.
- Additional Notes a receiving unit for receiving correspondence information indicating a correspondence between a slice and a network;
- a terminal comprising a control unit that, when a specific slice cannot be used in a specific network determined based on the correspondence information, stores a combination of information indicating the specific network and information indicating the specific slice in a memory unit.
- the terminal described in Appendix 1 wherein the control unit stores the combination in the memory unit, and then excludes the specific network from selection candidates when selecting a network for connecting to the specific slice, or lowers the priority of the specific network as a selection candidate.
- Supplementary Items 1 to 5 provide a technique for suppressing unnecessary repetition of transitions between networks in a technique for performing network transitions in order for a terminal to use a desired slice.
- Supplementary Item 2 makes it possible to control the priority of the network selected for transition.
- Supplementary Item 3 makes it possible to return the state to a previous state as time passes.
- Supplementary Item 4 makes it possible to increase the possibility of connecting to a desired slice.
- each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices.
- the functional blocks may be realized by combining the one device or the multiple devices with software.
- Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
- a functional block (component) that performs the transmission function is called a transmitting unit or transmitter.
- the network node device 30 and the terminal 20 in one embodiment of the present disclosure may function as a computer that performs processing of the communication method of the present disclosure.
- FIG. 11 is a diagram showing an example of the hardware configuration of the network node device 30 and the terminal 20 in one embodiment of the present disclosure.
- the network node device 30 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory device 1002, an auxiliary memory device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.
- the term "apparatus” may be interpreted as a circuit, device, unit, etc.
- the hardware configuration of the network node apparatus 30 and the terminal 20 may be configured to include one or more of the apparatuses shown in the figure, or may be configured to exclude some of the apparatuses.
- the functions of the network node device 30 and the terminal 20 are realized by loading specific software (programs) onto hardware such as the processor 1001 and the storage device 1002, causing the processor 1001 to perform calculations, control communications by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
- the processor 1001 for example, operates an operating system to control the entire computer.
- the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
- CPU central processing unit
- control unit 140, control unit 240, etc. may be realized by the processor 1001.
- the processor 1001 reads out a program (program code), software module, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to the program.
- the program is a program that causes a computer to execute at least a part of the operations described in the above embodiment.
- the control unit 140 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- the control unit 240 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- the above-mentioned various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
- the processor 1001 may be implemented by one or more chips.
- the program may be transmitted from a network via a telecommunications line.
- the storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc.
- the storage device 1002 may also be called a register, a cache, a main memory, etc.
- the storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method relating to one embodiment of the present disclosure.
- the auxiliary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc.
- the above-mentioned storage medium may be, for example, a database, a server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.
- the communication device 1004 is hardware (transmitting/receiving 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, or a communication module.
- the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, etc. may be realized by the communication device 1004.
- the transmitting/receiving unit may be implemented as a transmitting unit or a receiving unit that is physically or logically separated.
- the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
- the output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (e.g., a touch panel).
- each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
- the network node device 30 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized by the hardware.
- the processor 1001 may be implemented using at least one of these pieces of hardware.
- the network node device 30 or the terminal 20 may also be provided in the vehicle 2001.
- FIG. 12 shows an example of the configuration of the vehicle 2001.
- the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013.
- the network node device 30 or the terminal 20 according to each aspect/embodiment described in this disclosure may be applied to a communication device mounted on the vehicle 2001, for example, to the communication module 2013.
- the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
- the steering unit 2003 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
- the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001.
- the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
- Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front and rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front and rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.
- the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
- the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
- the information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
- input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
- output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
- the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) maps, autonomous vehicle (AV) maps, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices.
- the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
- the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port.
- the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided on the vehicle 2001.
- the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication.
- the communication module 2013 may be located either inside or outside the electronic control unit 2010.
- the external device may be, for example, a base station, a mobile station, etc.
- the communication module 2013 may transmit at least one of the signals from the various sensors 2021-2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication.
- the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input.
- the PUSCH transmitted by the communication module 2013 may include information based on the above input.
- the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device, and displays it on the information service unit 2012 provided in the vehicle 2001.
- the information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
- the communication module 2013 also stores various information received from an external device in a memory 2032 that can be used by the microprocessor 2031.
- the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.
- the operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts.
- the order of the processing procedures described in the embodiment may be changed as long as there is no contradiction.
- the network node device 30 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof.
- the software operated by the processor possessed by the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor possessed by the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
- the notification of information is not limited to the aspects/embodiments described in the present disclosure and may be performed using other methods.
- the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination of these.
- RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
- Each aspect/embodiment described in this disclosure is a mobile communication system that is compatible with LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or decimal number)), FRA (Future Ra).
- the present invention may be applied to at least one of systems using IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems, and next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.).
- certain operations that are described as being performed by the base station 10 may in some cases be performed by its upper node.
- various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW).
- the base station 10 may be a combination of multiple other network nodes (such as an MME and an S-GW).
- the information or signals described in this disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may be input and output via multiple network nodes.
- the input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table.
- the input and output information may be overwritten, updated, or added to.
- the output information may be deleted.
- the input information may be sent to another device.
- the determination in this disclosure may be based on a value represented by one bit (0 or 1), a Boolean (true or false) value, or a comparison of numerical values (e.g., a comparison with a predetermined value).
- Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
- Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
- a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
- wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
- wireless technologies such as infrared, microwave
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
- the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
- the channel and the symbol may be a signal (signaling).
- the signal may be a message.
- the component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
- system and “network” are used interchangeably.
- a radio resource may be indicated by an index.
- the names used for the parameters described above are not intended to be limiting in any way. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
- the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.
- base station BS
- radio base station base station
- base station fixed station
- NodeB eNodeB
- gNodeB gNodeB
- access point e.g., "transmission point”
- gNodeB gNodeB
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
- a base station can accommodate one or more (e.g., three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
- RRH Remote Radio Head
- the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
- a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.
- MS Mobile Station
- UE User Equipment
- a mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
- At least one of the network node device 30 and the terminal 20 may be called a transmitting device, a receiving device, a communication device, etc.
- At least one of the network node device 30 and the terminal 20 may be a device mounted on a moving body, the moving body itself, etc.
- the moving body is a movable object, and the moving speed is arbitrary. It also includes the case where the moving body is stopped.
- the moving body includes, but is not limited to, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcart, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and objects mounted thereon.
- the moving body may also be a moving body that travels autonomously based on an operation command.
- At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations.
- 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 as a terminal.
- each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
- the terminal 20 may be configured to have the functions of the base station 10 described above.
- terms such as "uplink” and "downlink” may be read as terms corresponding to communication between terminals (for example, "side”).
- the uplink channel, downlink channel, etc. may be read as a side channel.
- the terminal in this disclosure may be interpreted as a base station.
- the base station may be configured to have the functions of the terminal described above.
- determining may encompass a wide variety of actions.
- Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), and considering ascertaining as “judging” or “determining.”
- determining and “determining” may include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and considering ascertaining as “judging” or “determining.”
- judgment” and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment (decision)” can be interpreted as “assuming,” “ex
- connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between elements may be physical, logical, or a combination thereof.
- “connected” may be read as "access.”
- two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
- the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to an element using a designation such as "first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
- a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
- Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
- SCS subcarrier spacing
- TTI transmission time interval
- radio frame structure a specific filtering process performed by the transceiver in the frequency domain
- a specific windowing process performed by the transceiver in the time domain etc.
- a slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.).
- a slot may be a time unit based on numerology.
- a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
- a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
- Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name that corresponds to the radio frame, subframe, slot, minislot, and symbol.
- one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI.
- TTI transmission time interval
- the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
- the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
- one slot may be called a unit time. The unit time may differ for each cell depending on the numerology.
- TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
- a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units.
- wireless resources such as frequency bandwidth and transmission power that can be used by each terminal 20
- TTI is not limited to this.
- the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
- the time interval e.g., the number of symbols
- the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum time unit of scheduling.
- the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
- a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
- a short TTI e.g., a shortened TTI, etc.
- TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers included in an RB may be determined based on the numerology.
- the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length.
- One TTI, one subframe, etc. may each be composed of one or more resource blocks.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be configured for a UE within one carrier.
- radio frames, subframes, slots, minislots, and symbols are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
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Abstract
Description
前記対応情報に基づいて決定した特定のネットワークにおいて、特定のスライスを使用できない場合に、前記特定のネットワークを示す情報と前記特定のスライスを示す情報との組み合わせを記憶部に保存する制御部と
を備える端末が提供される。
図1は、通信システムの例を説明するための図である。図1に示されるように、通信システムは、端末20であるUE、及び、複数のネットワークノード装置から構成される。以下、機能ごとに1つのネットワークノード装置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装置が実現してもよいし、複数のネットワークノード装置が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。
あるホームオペレータのネットワーク(HPLMN:Home Public Land Mobile Networks)に加入している端末20がローミングした先で在圏するオペレータのネットワークはVPLMN(Visited PLMN)と呼ばれる。
・上記S-NSSAIのスライスをサポートするVPLMNの一覧
端末20に通知される情報の例を図4に示す。図4において、例えば、S-NSSAI=1のスライスの利用に関しては、VPLMN 1、VPLMN 3、VPLMN 4の順で優先度が決められていることが示されている(VPLMN1の優先度が最も高い)。
Slice-based SORが適用される場合、例えば下記の動作が実行される。
本実施の形態では、端末20は、Slice-based SORを適用して、あるVPLMN(VPLMN-Aとする)において所望のスライス(スライス1とする)への接続が失敗した際に、あるいは、ネットワークから受信した情報等に基づいてスライス1への接続ができないと判明した際に、スライス1の識別情報とVPLMN-Aの識別情報の組を端末20の記憶部に保存する。
図6のフローチャートを参照して、端末20が実行する処理のフローを説明する。フローの前提として、端末20は、Slice based SoR情報として、VPLMNごとのサポートするスライスの情報(スライスサポート情報と呼ぶ)と、スライスとVPLMNの組ごとのタイマ値(例:図5)を保持しているものとする。
Slice-based SORに用いる情報(例:図4、図5)を通知するためのシーケンスの例を、図7を参照して説明する。ここでは、当該情報を「Slice-based SOR情報」と呼ぶ。
次に、スライスへの接続に失敗するケースについてのシーケンス例を、図8を参照して説明する。図8のシーケンスは、非特許文献2(3GPP TS 23.122)のFigure C.2.1に基づく。
以上説明した本実施の形態に係る技術により、Slice based SoR技術において、VPLMN間の不必要な遷移の繰り返しを抑制することが可能となる。
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装置30と端末20の機能構成例を説明する。
図9は、ネットワークノード装置30の機能構成の一例を示す図である。ネットワークノード装置30は、RAN(基地局10)、AMF、SMF、UPF、UDMのうちのいずれのネットワークノード装置であってもよいし、これら以外のネットワークノード装置であってもよい。
図10は、端末20の機能構成の一例を示す図である。図10に示されるように、端末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10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行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。送信部210と、受信部220をまとめて通信部と称してもよい。
(付記項1)
スライスとネットワークとの対応を示す対応情報を受信する受信部と、
前記対応情報に基づいて決定した特定のネットワークにおいて、特定のスライスを使用できない場合に、前記特定のネットワークを示す情報と前記特定のスライスを示す情報との組み合わせを記憶部に保存する制御部と
を備える端末。
(付記項2)
前記制御部は、前記組み合わせを前記記憶部に保存した後、前記特定のスライスへの接続のためのネットワーク選択において、前記特定のネットワークを選択候補から除外する、又は、前記特定のネットワークの選択候補としての優先度を下げる
付記項1に記載の端末。
(付記項3)
前記制御部は、前記組み合わせを前記記憶部に保存してから、予め定めた時間が経過した時点で、前記組み合わせを前記記憶部から削除する
付記項1又は2に記載の端末。
(付記項4)
前記制御部は、前記組み合わせを前記記憶部から削除した後に、前記特定のスライスを使用するために、前記特定のネットワークへの遷移を実行する
付記項3に記載の端末。
(付記項5)
スライスとネットワークとの対応を示す対応情報を受信する受信ステップ、
前記対応情報に基づいて決定した特定のネットワークにおいて、特定のスライスを使用できない場合に、前記特定のネットワークを示す情報と前記特定のスライスを示す情報との組み合わせを記憶部に保存する制御ステップと
を備える、端末が実行する通信方法。
上記実施形態の説明に用いたブロック図(図9~図10)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、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装置30及び端末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基地局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端末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。
30 ネットワークノード装置
50 HPLMN
60 VPLMN
110 送信部
120 受信部
130 設定部
140 制御部
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
2001 車両
2002 駆動部
2003 操舵部
2004 アクセルペダル
2005 ブレーキペダル
2006 シフトレバー
2007 前輪
2008 後輪
2009 車軸
2010 電子制御部
2012 情報サービス部
2013 通信モジュール
2021 電流センサ
2022 回転数センサ
2023 空気圧センサ
2024 車速センサ
2025 加速度センサ
2026 ブレーキペダルセンサ
2027 シフトレバーセンサ
2028 物体検出センサ
2029 アクセルペダルセンサ
2030 運転支援システム部
2031 マイクロプロセッサ
2032 メモリ(ROM,RAM)
2033 通信ポート(IOポート)
Claims (5)
- スライスとネットワークとの対応を示す対応情報を受信する受信部と、
前記対応情報に基づいて決定した特定のネットワークにおいて、特定のスライスを使用できない場合に、前記特定のネットワークを示す情報と前記特定のスライスを示す情報との組み合わせを記憶部に保存する制御部と
を備える端末。 - 前記制御部は、前記組み合わせを前記記憶部に保存した後、前記特定のスライスへの接続のためのネットワーク選択において、前記特定のネットワークを選択候補から除外する、又は、前記特定のネットワークの選択候補としての優先度を下げる
請求項1に記載の端末。 - 前記制御部は、前記組み合わせを前記記憶部に保存してから、予め定めた時間が経過した時点で、前記組み合わせを前記記憶部から削除する
請求項1に記載の端末。 - 前記制御部は、前記組み合わせを前記記憶部から削除した後に、前記特定のスライスを使用するために、前記特定のネットワークへの遷移を実行する
請求項3に記載の端末。 - スライスとネットワークとの対応を示す対応情報を受信する受信ステップ、
前記対応情報に基づいて決定した特定のネットワークにおいて、特定のスライスを使用できない場合に、前記特定のネットワークを示す情報と前記特定のスライスを示す情報との組み合わせを記憶部に保存する制御ステップと
を備える、端末が実行する通信方法。
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| PCT/JP2023/014306 WO2024209652A1 (ja) | 2023-04-06 | 2023-04-06 | 端末、及び通信方法 |
| JP2025512345A JPWO2024209652A1 (ja) | 2023-04-06 | 2023-04-06 |
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- 2023-04-06 WO PCT/JP2023/014306 patent/WO2024209652A1/ja not_active Ceased
Non-Patent Citations (3)
| Title |
|---|
| BAN AL-BAKRI, DOCOMO COMMUNICATIONS LAB.: "Introduction of Enhanced Access to Support Network Slice - Slice-based Steering of Roaming", 3GPP DRAFT; C1-230066; TYPE DISCUSSION, vol. CT WG1, 17 February 2023 (2023-02-17), Athens , Greece, pages 1 - 3, XP052238408 * |
| SAMSUNG: "Motivation for new SID on PLMN selection based on eSOR", 3GPP TSG-CT MEETING #99; CP-230288, 20 March 2023 (2023-03-20), pages 1 - 2, XP093220081 * |
| SUNG HWAN WON, NOKIA, NOKIA SHANGHAI BELL: "On the need for a weight factor associated with a list of VPLMNs supporting an S-NSSAI", 3GPP DRAFT; C1-230543; TYPE DISCUSSION; ENS_PH3, vol. CT WG1, 20 February 2023 (2023-02-20), Athens, GR, pages 1 - 2, XP052238863 * |
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