[go: up one dir, main page]

WO2025177369A1 - Terminal et procédé de communication - Google Patents

Terminal et procédé de communication

Info

Publication number
WO2025177369A1
WO2025177369A1 PCT/JP2024/005829 JP2024005829W WO2025177369A1 WO 2025177369 A1 WO2025177369 A1 WO 2025177369A1 JP 2024005829 W JP2024005829 W JP 2024005829W WO 2025177369 A1 WO2025177369 A1 WO 2025177369A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
registration request
transmission
operator
control unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/005829
Other languages
English (en)
Japanese (ja)
Inventor
章弘 久保田
真大 玉置
雅弘 鷹野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
Original Assignee
NTT Docomo Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to PCT/JP2024/005829 priority Critical patent/WO2025177369A1/fr
Publication of WO2025177369A1 publication Critical patent/WO2025177369A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H04W48/06—Access restriction performed under specific conditions based on traffic conditions
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events

Definitions

  • the present invention relates to a terminal and a communication method in a communication system.
  • 5G Fifth Generation Partnership Project
  • 5G New Radio
  • NR New Radio
  • NR is considering network architectures including 5GC (5G Core Network), which corresponds to EPC (Evolved Packet Core), the core network in the LTE (Long Term Evolution) network architecture, 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 LTE network architecture (for example, Non-Patent Document 1 and Non-Patent Document 2).
  • 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
  • the RAN Radio Access Network
  • Non-Patent Document 1 and Non-Patent Document 2 Non-Patent Document 2
  • the present invention was made in consideration of the above points, and aims to automatically reselect a carrier when restrictions are imposed during roaming.
  • a terminal has a control unit that determines whether to suppress the transmission of a registration request when restrictions are imposed during roaming, and a transmission unit that transmits the registration request to a first operator if the transmission of the registration request is not suppressed, and the control unit performs a re-search for operators when certain conditions related to the suppression of the transmission of the registration request are met.
  • the disclosed technology makes it possible to automatically reselect a carrier if restrictions are imposed during roaming.
  • FIG. 1 is a diagram illustrating an example of a communication system.
  • FIG. 1 is a diagram illustrating an example of a communication system in a roaming environment.
  • FIG. 10 is a diagram illustrating an example of registration refusal.
  • FIG. 10 is a diagram illustrating an example of a restriction.
  • FIG. 10 is a diagram illustrating an example of a registration request.
  • FIG. 10 is a diagram illustrating an example (1) of a registration request according to an embodiment of the present invention.
  • FIG. 10 is a diagram illustrating an example (2) of a registration request according to an embodiment of the present invention.
  • FIG. 10 is a diagram illustrating an example (3) of a registration request according to an embodiment of the present invention.
  • FIG. 10 is a diagram illustrating an example (4) of a registration request according to an embodiment of the present invention.
  • 10 is a flowchart illustrating an example of a registration request according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a base station 10 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.
  • 2 is a diagram illustrating an example of a hardware configuration of a base station 10 and a terminal 20 according to an embodiment of the present invention.
  • FIG. FIG. 2 is a diagram showing an example of the configuration of a vehicle 2001 according to an embodiment of the present invention.
  • LTE Long Term Evolution
  • NR Universal Terrestrial Radio Access
  • LAN Local Area Network
  • "configuring" radio parameters etc. may mean that predetermined values are pre-configured, or that radio parameters notified from the network node 30 or terminal 20 are configured.
  • Figure 1 is a diagram illustrating an example of a communication system.
  • the communication system is composed of a UE, which is a terminal 20, and multiple network nodes 30.
  • a UE which is a terminal 20
  • multiple network nodes 30 it is assumed that one network node 30 corresponds to each function, but multiple functions may be realized by one network node 30, or multiple network nodes 30 may realize one function.
  • the "connection" described below may be a logical connection or a physical connection.
  • the RAN Radio Access Network
  • the RAN is a network node 30 with radio access functionality, which may include a base station 10, and is connected to a UE, an AMF (Access and Mobility Management Function), and a UPF (User plane function).
  • the AMF is a network node 30 with 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 30 with functions such as a PDU (Protocol Data Unit) session point to the outside that interconnects with the DN (Data Network), packet routing and forwarding, and user plane QoS (Quality of Service) handling.
  • the UPF and DN constitute a network slice. In a wireless communication network in an embodiment of the present invention, multiple network slices may be constructed.
  • 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), AUSF (Authentication Server Function), PCF (Policy Control Function), and AF (Application Function).
  • the AMF, SMF, NSSF, NEF, NRF, UDM, AUSF, PCF, and AF are network nodes 30 that are interconnected via their respective service-based interfaces: Namf, Nsmf, Nnssf, Nnef, Nnrf, Nudm, Nausf, Npcf, and Naf.
  • the SMF is a network node 30 that has 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 30 that has the function of notifying other NFs (Network Functions) of capabilities and events.
  • the NSSF is a network node 30 that has 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 30 that has the function of controlling network policies.
  • the AF is a network node 30 that has the function of controlling application servers.
  • the NRF is a network node 30 that has the function of discovering NF instances that provide services.
  • the UDM is a network node 30 that manages subscriber data and authentication data. The UDM is connected to the UDR (User Data Repository) that holds this data.
  • Figure 2 is a diagram illustrating an example of a communication system in a roaming environment.
  • the network is composed of a terminal 20 (UE) and multiple network nodes 30.
  • UE terminal 20
  • network nodes 30 it is assumed that one network node 30 corresponds to each function, but multiple functions may be realized by one network node 30, or multiple network nodes 30 may realize one function.
  • connection described below may be a logical connection or a physical connection.
  • the RAN is a network node 30 with radio access functionality, and is connected to the UE, AMF, and UPF.
  • the AMF is a network node 30 with functions such as RAN interface termination, NAS termination, registration management, connection management, reachability management, and mobility management.
  • the UPF is a network node 30 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 of an 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 nodes 30 that are interconnected via their respective service-based interfaces: Namf, Nsmf, Nnssf, Nnef, Nnrf, Nudm, Nausf, Npcf, and Naf.
  • the SMF is a network node 30 that has functions such as session management, UE IP address allocation and management, DHCP function, ARP proxy, and roaming function.
  • the NEF is a network node 30 that has the function of notifying other NFs of capabilities and events.
  • the NSSF is a network node 30 that has functions such as selecting the network slice to which the UE connects, determining the allowed NSSAI, determining the configured NSSAI, and determining the AMF set to which the UE connects.
  • the PCF is a network node 30 that has the function of controlling network policies.
  • the AF is a network node 30 that has the function of controlling application servers.
  • the NRF is a network node 30 that has the 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 hSEPP is
  • the UE is in a roaming environment connected to the RAN and AMF in the VPLMN (Visited PLMN).
  • the VPLMN and 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.
  • restrictions may be imposed if the roaming destination network is congested, or if a large-scale event causes a sudden increase in traffic in a specific area.
  • restrictions may be imposed if a certain operator is affected by a disaster and experiences an outage, and there is a high possibility of congestion occurring if other operators accept affected users. Users expect the roaming destination to be automatically changed to an operator with no restrictions or weaker restrictions.
  • FIG. 3 is a diagram illustrating an example of registration rejection.
  • the terminal 20 sends a registration request to the base station 10A of the roaming operator A.
  • the base station 10A of the roaming operator A sends a registration reject to the terminal 20.
  • the terminal 20 transitions to the 5GMM-DEREGISTERED.PLMN-SEARCH state (see Non-Patent Document 3), and becomes able to automatically transition to another PLMN.
  • the terminal 20 automatically performs a search for operators again, and sends a registration request to the base station 10B of another operator B.
  • Figure 4 is a diagram illustrating an example of restriction. Restrictions are implemented by suppressing terminal signal transmission itself through broadcast information. As shown in Figure 4, in 5G, restrictions are implemented for each access category and each access identity.
  • the broadcast information contains restriction information indicating that the access category is 3, the restriction rate is 90%, the restriction time is 4 seconds, and the restricted targets are access identities other than 11-15.
  • a general mobile device with an access identity of 0 performs a restriction determination once every 4 seconds when it transmits NAS signaling (location registration, etc.) corresponding to access category 3, and there is a 90% probability that the device itself will determine that transmission is not permitted. If the device itself determines that transmission is permitted, the terminal 20 can transmit a location registration to the base station 10.
  • Figure 5 is a diagram illustrating an example of a registration request.
  • terminal 20 when signal transmission is suppressed due to restrictions, terminal 20 does not send a registration request. As a result, it does not receive a registration rejection from the network, and therefore does not trigger a re-search for operators.
  • Terminal 20 continues to remain with operator A, which is subject to restrictions. Therefore, due to restrictions, terminal 20 is unable to send a registration request or automatically transition to another operator.
  • FIG. 6 is a diagram illustrating an example (1) of a registration request in an embodiment of the present invention.
  • terminal 20 determines that a registration request has been inhibited due to restrictions imposed by the roaming destination network, it increments a counter by 1. An attempt is made to send a registration request each time the restriction time elapses, and the counter is incremented by 1 each time the request is inhibited due to restrictions.
  • step 1 when the terminal 20 detects using the counter that the transmission of a registration request to operator A has been suppressed N times, the terminal 20 transitions the state related to mobility management in the NAS to 5GMM-DEREGISTERED.PLMN-SEARCH and performs a search for operators again. This enables the terminal 20 to send a registration request to operator B in step 2.
  • the counter threshold N may be specified in the specifications, may be a UE implementation value, or may be notified by the network.
  • the mobility management state of the terminal's NAS is transitioned to 5GMM-DEREGISTERED.PLMN-SEARCH, and a search for an operator is performed again. Note that the standby timer is stopped when the terminal breaks through the restrictions and sends a registration request.
  • step 1 terminal 20 detects that a certain amount of time has passed since the initial transmission of a registration request to operator A was suppressed. Terminal 20 transitions the NAS mobility management state to 5GMM-DEREGISTERED.PLMN-SEARCH and performs a re-search for operators. In step 2, terminal 20 sends a registration request to another operator B.
  • the operator in the cell's current range may be stored in an access-denied list for a certain period of time, and then an operator search may be performed.
  • FIG. 8 is a diagram illustrating an example (4) of a registration request in an embodiment of the present invention.
  • FIG. 8 shows an example in which there is an available operator other than operator A.
  • An available operator may be an operator that is not included in the access denial list.
  • terminal 20 detects the expiration of the waiting timer.
  • terminal 20 sets operator A as unavailable.
  • Terminal 20 transitions the state related to mobility management of the NAS to 5GMM-DEREGISTERED.PLMN-SEARCH and performs a re-search for operators that are not included in the access denial list.
  • terminal 20 sends a registration request to another operator B.
  • FIG. 9 is a diagram illustrating an example (5) of a registration request in an embodiment of the present invention.
  • FIG. 9 shows an example in which there is no available operator other than operator A.
  • An available operator may be an operator that is not included in the access denial list.
  • the terminal 20 detects the expiration of the wait timer.
  • the terminal 20 sets operator A as unavailable.
  • the terminal 20 transitions the state related to mobility management of the NAS to 5GMM-DEREGISTERED.PLMN-SEARCH and performs a re-search for operators. As a result of the re-search, the terminal 20 detects that there is no available operator and resets the access denial list.
  • FIG 10 is a flowchart illustrating an example of a registration request in an embodiment of the present invention.
  • the initial state is when the terminal 20 performs a service provider search and accesses a service provider.
  • step S101 the terminal 20 accesses an available service provider.
  • step S102 the terminal 20 triggers a registration request to the service provider being accessed.
  • step S103 the terminal 20 performs a restriction determination and determines whether transmission is possible. If transmission is possible, the process proceeds to step S104 (YES in S103), and if transmission is not possible, the process proceeds to step S106 (NO in S103).
  • step S104 the terminal 20 stops both the T390 and wait timers if they are running. Furthermore, if an access denial list exists, it may be reset.
  • step S105 the terminal 20 sends a registration request to the service provider being accessed.
  • step S106 the terminal 20 starts T390.
  • step S107 it is determined whether the wait timer has already started. If it has already started, proceed to step S108 (YES in S107); if it has not already started, proceed to step S109 (NO in S107).
  • step S109 the terminal 20 starts the wait timer.
  • step S108 the terminal 20 determines whether T390 will expire before the wait timer. If it will expire first, proceed to step S102 (YES in S108); if it will not expire first, proceed to step S110 (NO in S108).
  • step S110 the terminal 20 detects that the wait timer has expired.
  • step S111 the terminal 20 stores the current service provider, i.e., the service provider currently being accessed, in the access denial list.
  • step S112 the terminal 20 performs a service provider search.
  • step S113 the terminal 20 determines whether or not there is an available service provider. If there is an available service provider, the process proceeds to step S114 (YES in S113); if there is no available service provider, the process proceeds to step S115 (NO in S113).
  • step S115 the terminal 20 resets the access denial list.
  • step S114 the terminal 20 accesses an available service provider and proceeds to step S102.
  • the above-described embodiment allows the terminal to automatically reselect another operator if restrictions are imposed by the operator in the area where the terminal is roaming.
  • the base station 10, network node 30, and terminal 20 include functions for performing the above-described embodiments. However, the base station 10, network node 30, and terminal 20 may each include only a part of the functions of the embodiments.
  • FIG. 11 is a diagram showing an example of the functional configuration of the base station 10.
  • the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in FIG. 11 is merely an example. As long as the operations according to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any.
  • the network node 30 may have the same functional configuration as the base station 10.
  • a network node 30 having multiple different functions in the system architecture may be composed of multiple network nodes 30 separated by function.
  • the transmitter 110 has the function of generating signals to be transmitted to the terminal 20 or other network nodes 30, and transmitting the signals via wired or wireless communication.
  • the receiver 120 has the function of receiving various signals transmitted from the terminal 20 or other network nodes 30, and obtaining, for example, information at higher layers from the received signals.
  • the setting unit 130 stores pre-set setting information and various setting information to be sent to the terminal 20 in a storage device, and reads it from the storage device as needed.
  • the contents of the setting information include, for example, settings related to the operations described in the embodiments.
  • the control unit 140 performs processing related to the operations described in the embodiments, as explained in the embodiments.
  • the control unit 140 also performs processing related to communication with the terminal 20.
  • the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.
  • Fig. 12 is a diagram showing an example of the functional configuration of the terminal 20. As shown in Fig. 12, 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. 12 is merely an example.
  • the names of the functional divisions and functional units may be any as long as they can perform the operations according to the embodiment of the present invention.
  • 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 control signals, reference signals, etc. transmitted from the network node 30.
  • the setting unit 230 stores various setting information received from the network node 30 by the receiving unit 220 in a storage device and reads it from the storage device as needed.
  • the setting unit 230 also stores setting information that is set in advance.
  • the content of the setting information includes, for example, settings related to the operations described in the embodiments.
  • the control unit 240 performs processing related to the operations described in the embodiments, as explained in the embodiments.
  • the control unit 240 also performs processing related to the capacity-enhanced cell.
  • the functional unit related to signal transmission in the authentication control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.
  • each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (e.g., via wire, wirelessly, etc.) and these multiple devices.
  • the functional block may be realized by combining the single device or multiple devices with software.
  • Functions include, but are not limited to, judgment, determination, assessment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, regard, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
  • a functional block (component) that performs transmission functions is called a transmitting unit or transmitter.
  • transmitting unit or transmitter As mentioned above, there are no particular limitations on how these functions are implemented.
  • the network node 30, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • Figure 13 is a diagram showing an example of the hardware configuration of a base station 10 and terminal 20 in one embodiment of the present disclosure.
  • the network node 30 may have the same hardware configuration as the base station 10.
  • the above-mentioned base station 10 and terminal 20 may be 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, etc.
  • the term "apparatus" can be interpreted as a circuit, device, unit, etc.
  • the hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.
  • the functions of the base station 10 and terminal 20 are realized by loading specific software (programs) onto hardware such as the processor 1001 and storage device 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of the reading and writing of data from and to the storage device 1002 and auxiliary storage device 1003.
  • the processor 1001 for example, runs an operating system to control the entire computer.
  • the processor 1001 may be configured as a central processing unit (CPU) that includes an interface with peripheral devices, a control unit, 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 programs (program code), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with these.
  • the programs used are those that cause a computer to execute at least some of the operations described in the above-mentioned embodiments.
  • the control unit 140 of the base station 10 shown in FIG. 11 may be stored in the storage device 1002 and implemented by a control program running on the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 12 may be stored in the storage device 1002 and implemented by a control program running on the processor 1001.
  • While the various processes described above have been described as being executed by a single processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented on one or more chips.
  • the programs may also 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 code), software modules, etc. for implementing a communication method according to one embodiment of the present disclosure.
  • Auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, 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, 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 storage device 1002 and 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 a network device, network controller, network card, or communication module, for example.
  • the communication device 1004 may be configured to include high-frequency switches, duplexers, filters, frequency synthesizers, etc. to implement at least one of frequency division duplex (FDD) and time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • the transmitting/receiving antenna, amplifier unit, transmitting/receiving unit, transmission path interface, etc. may be implemented by the communication device 1004.
  • the transmitting/receiving unit may be implemented as a physically or logically separated transmitting unit and receiving unit.
  • the input device 1005 is an input device (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (e.g., a display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (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 base station 10 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), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by this hardware.
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • FIG. 14 shows an example configuration of vehicle 2001.
  • 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.
  • a communication device mounted on vehicle 2001 and may be applied to communication module 2013, for example.
  • 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 handle) and is configured to steer at least one of the front wheels and 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 on 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, audio system, speakers, television, and radio, that provide various types of information such as driving information, traffic information, and entertainment information, as well as one or more ECUs that control these devices.
  • the information service unit 2012 uses information obtained from external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001.
  • the driving assistance system unit 2030 is composed of various devices that provide functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices.
  • the driving assistance system unit 2030 also 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 2021-29, all of 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 external devices. For example, it sends and receives various information to and from external devices 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 transmits current signals from the current sensors input to the electronic control unit 2010 to external devices via wireless communication.
  • the communication module 2013 also transmits to external devices via wireless communication the following signals input to the electronic control unit 2010: front and rear wheel rotation speed signals acquired by rotation speed sensor 2022, front and rear wheel air pressure signals acquired by air pressure sensor 2023, vehicle speed signals acquired by vehicle speed sensor 2024, acceleration signals acquired by acceleration sensor 2025, accelerator pedal depression amount signals acquired by accelerator pedal sensor 2029, brake pedal depression amount signals acquired by brake pedal sensor 2026, shift lever operation signals acquired by shift lever sensor 2027, and detection signals for detecting obstacles, vehicles, pedestrians, etc. acquired by object detection sensor 2028.
  • the communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on the information service unit 2012 provided in the vehicle 2001.
  • the communication module 2013 also stores the various information received from external devices in memory 2032 that can be used by the microprocessor 2031. Based on the information stored in memory 2032, 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 2021-2029, etc. provided in the vehicle 2001.
  • a terminal which has a control unit that determines whether or not to suppress the transmission of a registration request when restrictions are imposed during roaming, and a transmission unit that transmits the registration request to a first operator if the transmission of the registration request is not suppressed, and the control unit performs a re-search for operators when certain conditions related to the suppression of the transmission of the registration request are satisfied.
  • the terminal can automatically reselect another carrier.
  • the terminal can automatically reselect a carrier.
  • the control unit may also re-search for operators if the transmission of a registration request has been inhibited a certain number of times. With this configuration, if restrictions are imposed by the operator currently in service while roaming, the terminal can automatically reselect another operator.
  • the control unit may also perform a search for operators again if a certain amount of time has passed since the initial registration request was sent. With this configuration, if restrictions are imposed by the operator currently in service during roaming, the terminal can automatically reselect another operator.
  • the control unit may also perform a search for operators again, excluding the first operator. With this configuration, if restrictions are imposed by the operator in the area where the terminal is located during roaming, the terminal can automatically reselect another operator.
  • control unit may perform a re-search for operators, including the first operator.
  • a communication method in which a terminal executes the following steps when restrictions are imposed during roaming: determining whether to suppress the transmission of a registration request; if the transmission of the registration request is not suppressed, transmitting the registration request to a first operator; and if certain conditions related to the suppression of the transmission of the registration request are met, performing a re-search for operators.
  • the terminal can automatically reselect another carrier.
  • the terminal can automatically reselect a carrier.
  • the operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components.
  • the order of the processing procedures described in the embodiments may be reversed as long as there is no contradiction.
  • the network node 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 of the network node 30 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in any suitable storage medium, such as random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or the like.
  • RAM random access memory
  • ROM read-only memory
  • EPROM EPROM
  • EEPROM electrically erasable programmable read-only memory
  • registers such as hard disk (HDD), removable disk, CD-ROM, database, server, or the like.
  • 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., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), 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 may be applied to at least one of systems utilizing LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 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)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), or other suitable systems, and next generation systems enhanced based on these. Additionally, multiple systems may be combined (for example, a combination of at least one of LTE and LTE-A with 5G).
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • xG xG (x is, for example, an integer or decimal number)
  • FRA Full Radio Access Network
  • 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 (Ultra-Wideband), Bluetooth (registered trademark), CDMA2000, NR (new Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registere
  • network node 30 may in some cases be performed by its upper node.
  • various operations performed for communication with terminal 20 may be performed by at least one of network node 30 and another network node other than network node 30 (such as, but not limited to, an MME or S-GW). While the above example illustrates a case where there is one other network node other than network node 30, the other network node may also be a combination of multiple other network nodes (for example, an MME and an S-GW).
  • the information, signals, etc. described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input/output via multiple network nodes.
  • Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.
  • the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., 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 be transmitted and received via a transmission medium.
  • a transmission medium such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)
  • wired technology such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)
  • wireless technology such as infrared or microwave
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • 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.
  • a channel and a symbol may be a signal (signaling).
  • a signal may be a message.
  • a component carrier CC may be called a carrier frequency, a cell, a frequency carrier, etc.
  • system and “network” are used interchangeably.
  • the names used for the parameters described above are not intended to be limiting in any way. Furthermore, the mathematical formulas 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 device fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • base stations 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 through a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
  • RRH Remote Radio Head
  • the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base station and base station subsystem that provides communication services within this coverage area.
  • 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 base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
  • At least one of the base station and the mobile station may be a device mounted on a moving object, or the moving object itself.
  • the moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned).
  • 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 user terminal.
  • the aspects/embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user 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 network node 30 described above.
  • terms such as "uplink” and “downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "side”).
  • terms such as uplink channel and downlink channel may be read as side channel.
  • the user terminal in this disclosure may be interpreted as a base station.
  • the base station may be configured to have the functions possessed by the user 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, searching, inquiring (e.g., searching a table, database, or other data structure), and ascertaining something that is considered to be a “determination.”
  • Determining and “determining” may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and so on.
  • judgment and “decision” can include regarding actions such as resolving, selecting, choosing, establishing, and comparing as having been “judgment” or “decision.” In other words, “judgment” and “decision” can include regarding some action as having been “judgment” or “decision.” Furthermore, “judgment (decision)” can be interpreted as “assuming,” “expecting,” “considering,” etc.
  • 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. 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 in some way precede the second element.
  • a and B are different may mean “A and B are different from each other.” Note that this term may also mean “A and B are each different from C.” Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
  • notification of specified information is not limited to being done explicitly, but may also be done implicitly (e.g., not notifying the specified information).
  • Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 30 Network node 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheels 2008 Rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotation speed sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029: Accelerator pedal sensor 2030: Driving assistance system unit 2031: Microprocessor 2032: Memory (ROM, RAM) 2033 Communication port (IO port)

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

l'invention concerne un terminal qui comprend : une unité de commande qui détermine s'il faut ou non supprimer une transmission d'une demande d'enregistrement à un moment de restriction pendant une itinérance ; et une unité de transmission qui, dans un cas où la transmission de la demande d'enregistrement ne doit pas être supprimée, transmet une demande d'enregistrement à un premier opérateur commercial. L'unité de commande répète l'exécution d'une recherche d'opérateur commercial dans un cas où une condition relative à la suppression de la transmission de la demande d'enregistrement est satisfaite.
PCT/JP2024/005829 2024-02-19 2024-02-19 Terminal et procédé de communication Pending WO2025177369A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/005829 WO2025177369A1 (fr) 2024-02-19 2024-02-19 Terminal et procédé de communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/005829 WO2025177369A1 (fr) 2024-02-19 2024-02-19 Terminal et procédé de communication

Publications (1)

Publication Number Publication Date
WO2025177369A1 true WO2025177369A1 (fr) 2025-08-28

Family

ID=96846648

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/005829 Pending WO2025177369A1 (fr) 2024-02-19 2024-02-19 Terminal et procédé de communication

Country Status (1)

Country Link
WO (1) WO2025177369A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005109570A (ja) * 2003-09-26 2005-04-21 Fujitsu Ltd 端末の状態制御システム
WO2008149778A1 (fr) * 2007-05-31 2008-12-11 Ntt Docomo, Inc. Dispositif de communication, système de communication et procédé de restriction
JP2021533680A (ja) * 2018-08-09 2021-12-02 ノキア テクノロジーズ オサケユイチア 異種アクセスネットワークを介した接続のセキュリティ実現のための方法及び装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005109570A (ja) * 2003-09-26 2005-04-21 Fujitsu Ltd 端末の状態制御システム
WO2008149778A1 (fr) * 2007-05-31 2008-12-11 Ntt Docomo, Inc. Dispositif de communication, système de communication et procédé de restriction
JP2021533680A (ja) * 2018-08-09 2021-12-02 ノキア テクノロジーズ オサケユイチア 異種アクセスネットワークを介した接続のセキュリティ実現のための方法及び装置

Similar Documents

Publication Publication Date Title
WO2025177369A1 (fr) Terminal et procédé de communication
WO2025173225A1 (fr) Nœud de réseau et procédé de communication
WO2025163824A1 (fr) Nœud de réseau et procédé de communication
WO2025037404A1 (fr) Nœud de réseau, procédé de communication et système de communication
EP4422346A1 (fr) Noeud de réseau et procédé de communication
WO2025203702A1 (fr) Terminal et procédé de communication
WO2024201757A1 (fr) Nœud de réseau, terminal, et procédé de commande
WO2025173214A1 (fr) Terminal, nœud de réseau et procédé de communication
WO2025074606A1 (fr) Nœud de réseau, station de base et procédé de communication
WO2024236778A1 (fr) Terminal, station de base et nœud de réseau
WO2025173215A1 (fr) Terminal, nœud de réseau et procédé de communication
WO2025203701A1 (fr) Terminal, nœud de réseau et procédé de communication
WO2025037373A1 (fr) Nœud de réseau, terminal et procédé de communication
WO2025141755A1 (fr) Nœud de réseau et procédé de communication
WO2025115199A1 (fr) Nœud de réseau et procédé de commande
WO2025238871A1 (fr) Nœud de réseau et procédé de commande
WO2025141756A1 (fr) Nœud de réseau et procédé de communication
WO2025238868A1 (fr) Nœud de réseau et méthode de contrôle
WO2025150201A1 (fr) Nœud de réseau et procédé d'autorisation
WO2025163835A1 (fr) Station de base, terminal, nœud de réseau et procédé de communication
WO2025238870A1 (fr) Nœud de réseau et procédé de commande
WO2025163834A1 (fr) Station de base, terminal et nœud de réseau
WO2025173179A1 (fr) Nœud de réseau
WO2025238836A1 (fr) Nœud de réseau, terminal et procédé de communication
WO2025150202A1 (fr) Nœud de réseau et procédé d'autorisation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24926040

Country of ref document: EP

Kind code of ref document: A1