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WO2025166785A1 - Procédé de communication sans fil, dispositif terminal et dispositif de réseau central - Google Patents

Procédé de communication sans fil, dispositif terminal et dispositif de réseau central

Info

Publication number
WO2025166785A1
WO2025166785A1 PCT/CN2024/077060 CN2024077060W WO2025166785A1 WO 2025166785 A1 WO2025166785 A1 WO 2025166785A1 CN 2024077060 W CN2024077060 W CN 2024077060W WO 2025166785 A1 WO2025166785 A1 WO 2025166785A1
Authority
WO
WIPO (PCT)
Prior art keywords
information
terminal device
network
message
network element
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/CN2024/077060
Other languages
English (en)
Chinese (zh)
Inventor
王亚鑫
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.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
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 Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to PCT/CN2024/077060 priority Critical patent/WO2025166785A1/fr
Publication of WO2025166785A1 publication Critical patent/WO2025166785A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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

Definitions

  • the present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment, and core network equipment.
  • devices need to access multiple 3rd Generation Partnership Project (3GPP) networks simultaneously to ensure service continuity.
  • 3GPP 3rd Generation Partnership Project
  • a dual registration mechanism was introduced. However, this dual registration mechanism only works in specific scenarios and cannot support more general scenarios, such as devices accessing two networks simultaneously.
  • the present application provides a wireless communication method, terminal equipment, and core network equipment.
  • the following introduces various aspects involved in the present application.
  • a wireless communication method including: a first terminal device receives a first message sent by a first network element of a core network, the first message includes first policy information, and the first policy information is used to determine one or more of the following information: access network information of the first terminal device; access network information of a second terminal device associated with the first terminal device.
  • a wireless communication method including: a first network element of a core network sends a first message to a first terminal device, the first message includes first policy information, and the first policy information is used to determine one or more of the following information: access network information of the first terminal device; access network information of a second terminal device associated with the first terminal device.
  • a wireless communication method including: a second network element of a core network receives a third message sent by a first network element of the core network, the third message is used to request first policy information, and the first policy information is used to determine one or more of the following information: access network information of a first terminal device; access network information of a second terminal device associated with the first terminal device.
  • a terminal device in a fourth aspect, includes a first terminal device, and the terminal device includes: a receiving unit, used to receive a first message sent by a first network element of a core network, the first message containing first policy information, and the first policy information is used to determine one or more of the following information: access network information of the first terminal device; access network information of a second terminal device associated with the first terminal device.
  • a core network device which is the first network element of the core network, and the core network device includes: a first sending unit, used to send a first message to a first terminal device, the first message includes first policy information, and the first policy information is used to determine one or more of the following information: access network information of the first terminal device; access network information of the second terminal device associated with the first terminal device.
  • a core network device which is the second network element of the core network, and the core network device includes: a first receiving unit, used to receive a third message sent by the first network element of the core network, the third message is used to request first policy information, and the first policy information is used to determine one or more of the following information: access network information of the first terminal device; access network information of the second terminal device associated with the first terminal device.
  • a terminal device comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.
  • a core network device comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect or the third aspect.
  • an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and/or core network device.
  • the system may also include other devices that interact with the terminal device or core network device in the solution provided in the embodiment of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a communication device (for example, a terminal device or a core network device) to execute some or all of the steps in the methods of the above aspects.
  • a communication device for example, a terminal device or a core network device
  • an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a communication device (e.g., a terminal device or a core device) to
  • a communication device e.g., a terminal device or a core device
  • the computer program product may be a software installation package.
  • an embodiment of the present application provides a chip, which includes a memory and a processor.
  • the processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.
  • a first terminal device may receive a first message sent by a first network element of a core network, so as to determine access network information corresponding to the first terminal device and/or the second terminal device based on first policy information in the first message.
  • the device may determine access networks corresponding to multiple associated terminal devices based on the first policy information, thereby helping to improve the gain of multiple access.
  • FIG1 is a diagram illustrating an example of a system architecture of a wireless communication system to which an embodiment of the present application may be applied.
  • FIG. 2 is a system architecture diagram of the fifth generation (5G) communication system.
  • FIG3 is a schematic diagram of the dual registration process.
  • FIG4 is a flow chart of a wireless communication method according to an embodiment of the present application.
  • FIG5 is a flowchart of a possible implementation of the method shown in FIG4 .
  • FIG6 is a flowchart of another possible implementation of the method shown in FIG4 .
  • FIG7 is a schematic diagram of the structure of the terminal device provided in an embodiment of the present application.
  • FIG8 is a schematic structural diagram of a core network device provided in an embodiment of the present application.
  • FIG9 is a schematic structural diagram of another core network device provided in an embodiment of the present application.
  • FIG10 is a schematic structural diagram of a communication device provided in an embodiment of the present application.
  • FIG. 1 is a diagram illustrating an example of the system architecture of a wireless communication system 100 to which an embodiment of the present application may be applied.
  • the wireless communication system 100 may include a network device 110 and a terminal device 120.
  • the network device 110 may be a device that communicates with the terminal device 120.
  • the network device 110 may provide network coverage for a specific geographical area and may communicate with the terminal device 120 located within the coverage area.
  • the terminal device 120 may access a network (e.g., a wireless network) through the network device 110.
  • the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth-generation (5G) systems or new radio (NR), long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc.
  • 5G fifth-generation
  • LTE long-term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • the technical solutions provided by the present application can also be applied to future communication systems, such as sixth-generation mobile communication systems, satellite communication systems, etc.
  • the terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • remote station remote terminal
  • mobile device user terminal
  • terminal wireless communication device
  • user agent user agent
  • the terminal device in the embodiments of the present application may be a device that provides voice and/or data connectivity to a user and can be used to connect people, objects, and machines, such as a handheld device or vehicle-mounted device with wireless connection capabilities.
  • the terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc.
  • the terminal device can be used to act as a base station.
  • the terminal device can act as a dispatching entity that provides sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) systems.
  • V2X vehicle-to-everything
  • D2D device-to-device
  • cell phones and cars use sidelink signals to communicate with each other.
  • Cell phones and smart home devices communicate with each other without having to relay the communication signals through a base station.
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device.
  • Equipment or wireless access network equipment may be a base station.
  • the base station may broadly cover various names as follows, or be replaced with the following names: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmitting point (TP), home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc.
  • the base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.
  • Terminal devices can communicate with each other via sidelinks.
  • Sidelink communication is also known as proximity services (ProSe) communication, unilateral communication, sidelink communication, or D2D communication.
  • ProSe proximity services
  • FIG2 is a system architecture diagram of a 5G network applicable to an embodiment of the present application.
  • the 5G system or NR network architecture released by the 3GPP standard group includes: a terminal device (also known as a UE) 201, an access network device 202 supporting 3GPP technology (including a radio access network (RAN) or access network (AN)), an access and mobility management function (AMF) network element 203, a session management function (SMF) network element 204, and a user plane function (UE) network element 205.
  • RAN radio access network
  • AN access network
  • AMF access and mobility management function
  • SMF session management function
  • UE user plane function
  • UPF policy control function
  • PCF policy control function
  • AF application function
  • DN data network
  • NSSF network slice selection function
  • AUSF authentication service function
  • UDM unified data management function
  • the network architecture shown in Figure 2 does not constitute a limitation on the 5G network architecture.
  • the 5G network architecture may include more or fewer network elements than shown, or may combine certain network elements.
  • the AN or RAN is represented in the form of (R)AN.
  • the terminal device 201 can be any terminal device in FIG1 , and will not be described in detail here.
  • Access network equipment 202 is the device that connects terminal devices to the network architecture wirelessly. It is primarily responsible for radio resource management, quality of service (QoS) management, data compression and encryption, etc. on the air interface side. Examples include NodeB, eNodeB, base stations in 5G mobile communication systems or NR communication systems, and base stations in future mobile communication systems.
  • QoS quality of service
  • UPF network element 205, AMF network element 203, SMF network element 204, and PCF network element 206 are network elements of the 3GPP core network (referred to as core network elements).
  • UPF network element 205 can be called a user plane function network element, which is mainly responsible for the transmission of user data.
  • Other network elements can be called control plane function network elements, which are mainly responsible for authentication, authorization, registration management, session management, mobility management, and policy control to ensure reliable and stable transmission of user data.
  • the UPF network element 205 can be used to forward and receive data from the terminal.
  • the UPF network element can receive service data from the data network and transmit it to the terminal through the access network device; the UPF network element can also receive user data from the terminal through the access network device and forward it to the data network.
  • the transmission resources allocated and scheduled by the UPF network element to the terminal are managed and controlled by the SMF network element.
  • the bearer between the terminal and the UPF network element may include: a user plane connection between the UPF network element and the access network device, and the establishment of a channel between the access network device and the terminal.
  • the user plane connection is a quality of service (QoS) flow that can be established between the UPF network element and the access network device to transmit data.
  • QoS quality of service
  • the AMF network element 203 can be used to manage terminal access to the core network, such as terminal location update, network registration, access control, terminal mobility management, terminal attachment and detachment, etc.
  • the AMF network element can also provide control plane storage resources for the session when providing services for the terminal session to store the session identifier, the SMF network element identifier associated with the session identifier, etc.
  • the PCF network element 206 (or simply "PCF") is used to provide policies, such as QoS policy and slice selection policy, to the AMF network element 203 and the SMF network element 204.
  • the PCF is responsible for formulating policies related to mobility management, session management, and billing for terminal devices.
  • the AF network element 209 (or simply "AF") is used to interact with the 3GPP core network elements to support application-affected data routing, access network exposure functions, and interact with the PCF network elements for policy control.
  • the DN 208 provides data services to users on networks such as IP Multimedia Services (IMS) and the Internet.
  • the DN 208 can host multiple application servers (ASs) offering different application services, such as carrier services, Internet access, and third-party services. These application servers implement the functions of AF network elements.
  • ASs application servers
  • NSSF 211 is used for network slice selection and supports the following functions: selecting the set of network slice instances to serve the UE; determining the allowed network slice selection assistance information (NSSAI) and, when necessary, determining the mapping to the contracted single-network slice selection assistance information (S-NSSAI); determining the configured NSSAI and, when necessary, determining the mapping to the contracted S-NSSAI; determining the set of AMFs that may be used to query the UE, or determining a list of candidate AMFs based on the configuration.
  • NSSAI allowed network slice selection assistance information
  • S-NSSAI single-network slice selection assistance information
  • AUSF 210 is used to receive the request from AMF 203 to authenticate the terminal, request the key from UDM 207, and then forward the issued key to AMF 203 for authentication processing.
  • UDM 207 includes functions such as the generation and storage of user contract data, management of authentication data, and supports interaction with external third-party servers.
  • the terminal device establishes an access layer connection with the AN through the Uu interface, exchanging access layer messages and wireless data transmission.
  • the terminal device also establishes a non-access stratum (NAS) connection with the AMF network element through the N1 interface, exchanging NAS messages.
  • NAS non-access stratum
  • the AMF network element is also responsible for forwarding session management-related messages between the terminal device and the SMF network element.
  • the UPF network element transmits data with the external data network through the N6 interface and with the AN through the N3 interface.
  • each network element in Figure 2 can be a network element in a hardware device, a software function running on dedicated hardware, or a virtualized function instantiated on a platform (e.g., a cloud platform).
  • a platform e.g., a cloud platform.
  • the network architecture shown in the above figure is only an example of the network elements included in the entire network architecture. In the embodiments of the present application, the network elements included in the entire network architecture are not limited.
  • a terminal device may need to access multiple 3GPP networks simultaneously, switching and splitting traffic between the two access networks.
  • a terminal device can access both a 4G network and a 5G network.
  • a terminal device can access two 5G networks of public land mobile networks (PLMNs) simultaneously.
  • PLMNs public land mobile networks
  • the basic requirement in this scenario is to allow the terminal device to register in the two access networks at the same time and maintain a dual registration state.
  • 5G and LTE system compatibility technologies provide support. Specifically, a single terminal device can be registered in both 5G and LTE access networks simultaneously, allowing for mobility-induced network switching.
  • the dual registration process is schematically illustrated below with reference to Figure 3.
  • FIG 3 illustrates the interaction of multiple devices.
  • these devices also include the evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN), the next generation RAN (NG-RAN), the evolved packet core (EPC), the packet data network gateway-control plane (PGW-C), and the home subscriber server (HSS).
  • UMTS evolved universal mobile telecommunications system
  • NG-RAN next generation RAN
  • EPC evolved packet core
  • PGW-C packet data network gateway-control plane
  • HSS home subscriber server
  • a UE attaches and registers to the EPC (LTE) access network.
  • the EPC assigns the UE a 4G globally unique temporary UE identity (GUTI), or 4G-GUTI. This is a temporary UE ID assigned by the MME and can be used to identify the MME and UE.
  • GUI globally unique temporary UE identity
  • step S302 the UE sends a registration request to the NG-RAN.
  • step S303 the NG-RAN performs AMF selection.
  • step S305 registration procedure.
  • the UE accesses the 5G network and sends a registration request to the 5G core network.
  • the UE uses the 5G-GUTI converted from the 4G-GUTI as its temporary identifier and reports it to the 5G core network.
  • step S306 the AMF registers the UE information with the UDM+HSS and notifies the network element not to cancel the UE's LTE registration.
  • the UE's LTE registration is implemented through the MME.
  • the UE completes the registration process in the 5G access network.
  • the UE receives the registration accept message sent by the new AMF; in step S390, the UE sends a registration completion message to the AMF. complete) information.
  • step S310 the UE requests a protocol data unit (PDU) session establishment procedure to establish a PDU session (5G access network).
  • PDU protocol data unit
  • step S311 the PGW-C+SMF network element initiates the release of the transferred packet data network (PDN) connection (PGW-C+SMF initiates release of transferred PDN connection) to release the PDN connection (LTE access network).
  • PDN packet data network
  • the process shown in Figure 3 applies to dual registration mode for a single UE, and the core network requires the UE to report associated access network information during registration to interact with other network elements.
  • the GUTI information reported by the UE can include relevant information about the MME.
  • the network element that receives the registration information can simultaneously obtain information about both access networks when interacting with the unified management network element (UDM+HSS).
  • UDM+HSS unified management network element
  • some operators recommend using two subscriber identity modules (SIM) cards to access two networks, which can also be regarded as two associated UEs accessing two networks at the same time.
  • SIM subscriber identity modules
  • Multi-USIM Multi-Universal Subscriber Identity Module
  • a single mobile terminal can be equipped with multiple (usually two) USIM cards.
  • the two USIM cards can independently register with the access network, establish corresponding sessions, and conduct independent services. It should be noted that there is no association between the two USIM cards; from the network's perspective, they appear to be two independent UEs.
  • the dual UEs in the embodiments of the present application refer to two UEs corresponding to the same device, which can also be referred to as two UEs of a dual-steer device.
  • the device can also be referred to as a dual-USIM card UE.
  • the USIM card can also be replaced by a SIM card or a dual subscription permanent identifier (SUPI).
  • the two USIM cards can access the same PLMN but with different access technologies.
  • one of the two USIM cards uses a 4G network and the other uses a 5G network.
  • one of the two USIM cards uses a ground station for access and the other uses a satellite for access.
  • the access methods of the two USIM cards are the same (for example, both use 5G network access), but they are accessed through different PLMNs.
  • both USIM cards access a 5G base station, but one uses a mobile network and the other uses a Unicom network.
  • an embodiment of the present application provides a wireless communication method.
  • the first terminal device can determine the access network information of the first terminal device and/or the second terminal device associated with the first terminal device based on the first policy information sent by the first network element of the core network, which helps the first terminal device and the second terminal device to determine the corresponding access networks respectively for network selection and registration.
  • Figure 4 is introduced from the perspective of the interaction between the first terminal device and the first network element of the core network.
  • the first terminal device may be one of the multiple terminal devices associated with the terminal device.
  • the terminal device may be the dual UE device mentioned above, or a multi-card device with two or more USIM cards or similar identifiers.
  • the first terminal device may be one of multiple mutually associated terminal devices.
  • multiple terminal devices associated with the same device may each have different identifiers, and the first terminal device is one of the multiple terminal devices.
  • the terminal device has multiple SIM cards
  • the first terminal device is a terminal device represented by one of the SIM cards.
  • the terminal device including the first terminal device is a dual SIM card device, one of the dual SIM cards corresponds to the first terminal device, and the other card corresponds to the second terminal device.
  • the first terminal device is associated with the second terminal device.
  • a terminal device including a first terminal device may be provided with multiple USIM cards, and the terminal device may access multiple access networks through different USIM cards in the multiple USIM cards.
  • the terminal device may be provided with USIM1 and USIM2, and accordingly, access the first access network through USIM1 and access the second access network through USIM2.
  • the first network element of the core network is a registration management network element or a mobility management network element in the core network.
  • the first network element may be an AMF or MME.
  • the first network element may also be another core network element in a future communication system with similar functions to the AMF or MME.
  • the first message is a message sent by the first network element to the first terminal device via a corresponding interface.
  • the first network element is an AMF
  • the first message can be sent to the first terminal device via an N1 interface.
  • the first message includes first policy information, and the first policy information is used to determine one or more of the following information: access network information of the first terminal device; access network information of the second terminal device associated with the first terminal device.
  • the first policy information is used to determine the access network information of the first terminal device. That is, the first policy information is used to indicate information about multiple access networks that the first terminal device can select.
  • a second terminal device associated with the first terminal device can receive corresponding policy information directly issued by the core network, and this policy information is used to determine the access network information of the second terminal device.
  • the first policy information is used to determine access network information for the first and second terminal devices.
  • the first policy information indicates information about multiple access networks that the first and second terminal devices can select.
  • the first terminal device after receiving the first policy information, the first terminal device can synchronize and update its policy with the second terminal device.
  • the first terminal device after receiving the first policy information, the first terminal device locally synchronizes and updates the policy with the second terminal device, and synchronizes the policy related to the second terminal device to the second terminal device.
  • the first terminal device after receiving the first policy information, the first terminal device synchronizes and updates the policy locally with the second terminal device, and synchronizes all policies to the second terminal device so that the second terminal device selects a different network from the first terminal device.
  • the second terminal device associated with the first terminal device may be a terminal device corresponding to another SIM card or USIM card on the terminal device where the SIM card or USIM card corresponding to the first terminal device is located.
  • the first terminal device and the second terminal device may be terminal devices corresponding to different SIM cards or USIM cards on the same terminal device.
  • the second terminal device can be one or more terminal devices.
  • the second terminal device is one terminal device.
  • the second terminal device is multiple terminal devices.
  • the first policy information is used to determine the access network information of the second terminal device.
  • the first policy information indicates information about multiple access networks available to the second terminal device.
  • the first terminal device also needs to synchronize and update policies with the second terminal device.
  • the first terminal device can continue to use the access network currently used to send the first message, while the second terminal device selects and registers among the multiple available access networks.
  • a separate management function network element of a terminal device can use and manage the policies of the first and second terminal devices, without requiring specific synchronization to each terminal device.
  • the management function network element corresponding to the terminal device can centrally manage the network selection of the first and second terminal devices. Furthermore, this function can be implemented by specific devices.
  • the multiple access networks may be multiple access networks currently selectable by the first terminal device or the second terminal device, or may be multiple access networks currently or subsequently selectable by the first terminal device or the second terminal device.
  • the one or more access networks may be one or more access networks that can be searched in a certain area.
  • the multiple access networks corresponding to the first terminal device and the second terminal device respectively at least some of the access networks are different, so that the first terminal device and the second terminal device can respectively select different access networks and register.
  • the access network information may include one or more of the following information: access network type (AN type), radio access technology (RAT type), and PLMN information.
  • AN type access network type
  • RAT type radio access technology
  • PLMN information PLMN information.
  • the access network may also be referred to as an access network.
  • the access network type may include a 3GPP access network and a non-3GPP (non-3GPP) access network, which is not limited herein.
  • 3GPP access networks may include access networks in 4G networks, access networks in 5G networks, and access networks in non-terrestrial networks (NTNs).
  • NTNs non-terrestrial networks
  • Non-3GPP access networks include, for example, wireless fidelity (Wi-Fi).
  • the access network can be related to geostationary earth orbit (GEO) satellites and ground networks.
  • GEO geostationary earth orbit
  • a terminal device can access the 3GPP network based on the NR-GEO access method.
  • the terminal device can also access the 3GPP network based on the NR-low earth orbit (LEO) access method or the NR-medium earth orbit (MEO) access method.
  • LEO NR-low earth orbit
  • MEO NR-medium earth orbit
  • the type of radio access technology may include one or more of the following: satellite-based RAT, NR RAT, Wi-Fi RAT, and E-UTRAN RAT.
  • satellite-based RAT is NR-GEO RAT.
  • the PLMN information may include a PLMN ID, such as PLMN A, PLMN B, or PLMN C.
  • the first policy information may directly specify the access networks of the first terminal device and the second terminal device.
  • the priority information includes a priority level corresponding to an access network or information associated with the priority level.
  • the priority level corresponding to an access network may be a priority level among multiple currently selectable access networks, a priority level among multiple currently or subsequently selectable access networks, or a priority level among all currently selectable access networks.
  • the correspondence between the access network information and the priority information is one-to-one.
  • the correspondence between access network information and priority information is not one-to-one.
  • one priority may correspond to multiple access networks.
  • one access network may correspond to different priorities under different conditions.
  • the correspondence between the access network information indicated by the first policy information and the priority information can be indicated by a table.
  • Table 1 is a possible implementation. It should be understood that the table in the embodiment of the present application is only an example and does not constitute a limitation.
  • the correspondence between the access network information and the priority information is a correspondence under a first condition. That is, the correspondence between the access network information and the priority information is determined based on a certain condition. When the information under the first condition changes, the correspondence between the access network information and the priority information may also change.
  • the first policy information is further used to indicate a first condition, so that the first terminal device or the second terminal device selects an access network with a higher priority based on the current conditions. For example, if the first terminal device determines based on the first policy information that the network to be accessed under the current conditions is not the network with the highest priority, the first terminal device may disconnect from the current network and then access the network with the highest priority.
  • the first condition is associated with area information (location) and/or access network information.
  • the first policy information may indicate priority information corresponding to different area information conditions.
  • the area information may be specific area information or associated information of area information.
  • the specific area information may be, for example, specific geographic location information, tracking area (TA) information, or cell information.
  • the first policy information may indicate priority information corresponding to different access network information conditions.
  • the access network information may include information about the current access network of the first terminal device and/or the second terminal device, and may also include information about an access network different from the current access network of the first terminal device and/or the second terminal device.
  • the first condition in the multi-access policy corresponding to the first terminal device is related to the current access network of the first terminal device.
  • a network can be selected according to the priority of other networks.
  • the first condition in the multi-access policy corresponding to the second terminal device is related to the current access network of the second terminal device.
  • the first policy information may indicate priority information corresponding to the current other access network (other AN).
  • the access network information may also include information about the current other access network to facilitate the terminal device's selection of a different access network.
  • the current other access network may be the current access network of another terminal device associated with the terminal device selecting the network, or may be information about another access network different from the current or subsequent network of the terminal device selecting the network.
  • the first condition in the multi-access policy corresponding to the first terminal device is related to the current access network of the second terminal device.
  • the first condition in the multi-access policy corresponding to the second terminal device is related to the current access network of the first terminal device.
  • the second terminal device can select and register an access network based on the priority information under the selected network conditions.
  • the first policy information is associated with information of the other access network.
  • possible implementations of the first policy information are shown in Table 3.
  • the first policy information in the first message can be used to determine the initial policy or to update the policy, which is not limited here.
  • the second policy information that the second terminal device may receive can also be used to determine the initial policy or to update the policy.
  • the first policy information received by the first terminal device or the second terminal device can be the initial policy information or the policy information updated by the policy management network element.
  • the first network element may send the first message based on a request message from the first terminal device.
  • the request message may be a second message.
  • the first terminal device sends the second message to the first network element before receiving the first message. That is, the first network element receives the second message from the first terminal device before sending the first message to the first terminal device.
  • the second message is used by the first terminal device to send a request for a multi-access service to the first network element.
  • the second message includes first information, where the first information is used to request service transmission through multiple access networks.
  • the second message may be a registration request message.
  • the first terminal device may send a registration request to the first network element via the second message.
  • the registration request may include the first information to request a multi-access service.
  • the second message may be a multi-access service request message, for subscribing to a multi-access policy from the policy management network element via the first network element.
  • the first message may be indication information requesting the multi-access service, and thus may also be referred to as multi-access indication information or "dual steer" indication information, for requesting the multi-access service.
  • the first information may be displayed indication information, or may be indicated in an implicit form.
  • the first message when the first message includes information about a second terminal device associated with the first terminal device, it may indicate a request for a multi-access service.
  • the first message may include the identifier of the second terminal device associated with the first terminal device.
  • the first network element may deem that the first terminal device is sending multi-access indication information.
  • the first message may include the ID information of the second terminal device to provide an implicit indication.
  • the first network element may use the first information to perform an authorization check.
  • the first network element may query the UDM or HSS for corresponding multi-access subscription information.
  • the first network element may also obtain the ID information of the second terminal device from the subscription information of the UDM or HSS.
  • the first network element when it sends the first policy information to the first terminal device, it can be sent through a feedback message of the second message, or through a special downlink message.
  • the first network element can send the first message to the first terminal device by feedback registration/service request response.
  • the first network element can send the first message through a special downlink message.
  • the AMF first network element
  • DL NAS Transfer downlink non-access layer transmission
  • the first terminal device can synchronize and update the multi-access policy with the second terminal device.
  • the first terminal device can send second policy information to the second terminal device, and the second policy information is used to determine the access network information of the second terminal device.
  • the second policy information may also be directly sent by the core network to the second terminal device.
  • the second policy information may be exactly the same as the content in the first policy information (including policy information of the first terminal device and the second terminal device), or it may only include policy information related to the second terminal device.
  • the second policy information is used to determine the access network information of the second terminal device. Similar to the first policy information, the second policy information can also indicate the correspondence between the access network information and the priority information and the first condition, which will not be repeated here.
  • the first terminal device and the second terminal device can For example, the first terminal device or the second terminal device may need to disconnect from the current access network.
  • the first terminal device may select and register to an access network according to the first policy information.
  • the first terminal device may select a network according to the first policy information and re-access (register) to the selected access network.
  • the second terminal device may select and register to the access network according to the second policy information.
  • the second terminal device may select a network according to the second policy information and re-access (register) to the selected access network.
  • the first terminal device and the second terminal device select a network and register according to the issued multi-access policy. If the current access network needs to be disconnected, the first terminal device and the second terminal device can reselect and access a new network according to the policy.
  • the first terminal device and the second terminal device can select based on the priority of the access network under current conditions and the access network that can be currently searched.
  • the current condition can be the access network and/or current location information of the second terminal device.
  • the first network element can interact with the policy management network element in the core network to obtain the first policy information.
  • the first network element can determine the first policy information through information sent by the policy management network element.
  • the policy management network element may be represented as a second network element in the core network.
  • the second network element may be a PCF.
  • the second network element may also be another core network element in a future communication system with similar functionality to the PCF.
  • the first network element sends a third message to the second network element, where the third message is used to request the first policy information.
  • the third message is used to send a policy acquisition request to the second network element and, therefore, may also be referred to as a subscription request.
  • the second network element After receiving the third message, the second network element sends a fourth message to the first network element, where the fourth message includes the first policy information.
  • the third message includes access network information of the first terminal device.
  • the access network information of the first terminal device may include an access network type, a RAT type, and/or a current serving PLMN.
  • the third message may further include information about a second terminal device associated with the first terminal device.
  • the information about the second terminal device associated with the first terminal device may include ID information of the second terminal device.
  • the policy information sent by the second network element to the first network element may be determined based on the access network information and/or location information of the first terminal device.
  • the first policy information may be determined based on the access network information and location information of the first terminal device.
  • the access network information and location information of the first terminal device can be carried in the third message.
  • the second network element may obtain the access network information of the first terminal device from other network elements of the core network.
  • the policy information is sent to the requesting party, that is, the first terminal device sending the request.
  • the multi-access policy of the second terminal device needs to be determined by synchronization with the first terminal device.
  • multi-access policy synchronization is required within the terminal device.
  • the terminal device side needs to support interaction or information sharing between two local USIM cards.
  • the core network determines the network selection policy/rules for the first terminal device and/or the second terminal device, i.e., the first policy information, based on the terminal device's subscription information and current access network information.
  • the core network sends the first policy information to the first terminal device, which synchronizes it to the second terminal device, thereby triggering the registration of the first terminal device and/or the second terminal device in the designated access network or the selected access network.
  • the terminal device sends multi-access indication information to the core network, and the core network feeds back policy information related to multi-access to the terminal device.
  • the policy information is used to instruct multiple terminal devices associated with the multi-access service to select and register for access networks.
  • the policy information may include information such as the access network type, PLMN, RAT, and the corresponding priority of the selected network, and may also include priority information when another access network has been selected at a different location.
  • the registration management network element after the registration management network element receives the multi-access indication information of the terminal device, it requests the policy management network element to obtain relevant policies.
  • the policy management network element can determine the multi-access policy based on the current terminal device's location information and the current access network information, and feed back the policy information of the two associated terminal devices to the registration management network element.
  • the first terminal device can be supported to send an indication to the network to indicate that it currently supports multi-access services or requests multi-access services, thereby triggering policy delivery. Furthermore, the first terminal device and the second terminal device can select and register access networks based on corresponding policies and conditions.
  • policy information is delivered to the executors, namely the first and second terminal devices performing network selection/registration.
  • the multi-access policy for the second terminal device is delivered directly by the core network, eliminating the need for internal policy synchronization on the terminal device side, resulting in minimal changes.
  • the core network's processing logic needs to be enhanced to deliver the two policies separately to the corresponding terminal devices.
  • the core network when the first terminal device registers or initiates a multi-access service request, the core network The network selection policy/rules of the first terminal device and/or the second terminal device are determined by the information and the current access network information, and are sent to the first terminal device and/or the second terminal device, thereby triggering the registration of the first terminal device and/or the second terminal device in the designated or selected access network.
  • the first terminal device sends multi-access indication information to the core network, and the core network feeds back policy information related to multi-access to the first terminal device and the second terminal device respectively.
  • the registration management network element After receiving the request from the first terminal device, the registration management network element requests the policy information of the second terminal device from the policy management network element based on the information of the first terminal device and the associated second terminal device. After receiving the request, the policy management network element determines the policy information of the second terminal device and sends it to the second terminal device through the mobility management network element.
  • the core network side after receiving the request information of the first terminal device, the core network side can trigger the policy information of the second terminal device through various implementation methods.
  • the following describes in detail various policy request and delivery methods.
  • the registration management network element or mobility management network element corresponding to the first terminal device and the second terminal device may be the same or different.
  • the network element is the first network element.
  • the registration management network element or mobility management network element is different, the first terminal device corresponds to the first network element, and the second terminal device corresponds to the third network element in the core network.
  • the third network element may be an AMF or MME, or may be another core network element with similar functions to the AMF or MME in a future communication system.
  • the first network element is AMF1 and the third network element is AMF2.
  • the policy management network element that formulates a multi-access policy for the first terminal device and the second terminal device can be the same or different.
  • the network element that formulates the policy is the second network element.
  • the first terminal device corresponds to the second network element
  • the second terminal device corresponds to a fourth network element in the core network.
  • the fourth network element may be a PCF, or may be another core network element with similar functions to the PCF in a future communication system.
  • the first network element may send the fifth message to the third network element.
  • sending the fifth message may be implemented within the network element.
  • the fifth message may also be called a multiple access request message.
  • the fifth message may include one or more of the following: first information for requesting service transmission to the terminal device through multiple access networks; and an identifier of the second terminal device.
  • the fifth message may include ID information of the second terminal device and multi-access indication information.
  • the third network element may send a sixth message to the second network element.
  • the sixth message is used to request the second policy information and may therefore also be referred to as a subscription request.
  • the second policy information is used to determine the access network information of the second terminal device.
  • the access network information of the first terminal device in the third message and the access network information of the second terminal device in the sixth message are both the current access network information of the terminal devices.
  • the first terminal device or the second terminal device receives the policy information, it can determine the information of one or more selectable access networks based on the relevant policy information, select and register them.
  • the first network element when the first network element and the third network element are the same, after receiving the registration request or multi-access request of the first terminal device, the first network element not only requests the policy of the first terminal device from the second network element, but also requests the policy of the second terminal device from the second network element or the fourth network element.
  • the first network element may send a sixth message to the fourth network element.
  • Detailed description of the sixth message is omitted here.
  • the second network element or the fourth network element may send a seventh message to the first network element or the third network element.
  • the seventh message includes the second policy information.
  • the second network element may send the seventh message to the first network element or the third network element.
  • the first network element may receive the seventh message sent by the fourth network element.
  • the second network element receives the third message from the first network element and feeds back the first policy information to the first network element; the fourth network element receives the sixth message from the third network element and feeds back the second policy information to the third network element.
  • the first network element sends the first policy information to the first terminal device.
  • the third network element sends the second policy information to the second terminal device.
  • the third network element can send the second policy information via a dedicated downlink message.
  • the first network element or the third network element may send an eighth message to the second terminal device.
  • the eighth message includes the second policy information. For example, when the first network element and the third network element are the same, the first network element sends the eighth message.
  • the second network element may send a multiple access request to the fourth network element.
  • the second network element sends the ninth message to the fourth network element.
  • the fifth message may be sent internally within the network element.
  • the ninth message may also be called a multiple access request message.
  • the ninth message includes one or more of the following information: first information for requesting service transmission to the terminal device through multiple access networks; and second information indicating an identifier of the terminal device.
  • the second policy information can be triggered in a variety of ways.
  • Method 1 triggered by the ninth message, that is, the second network element sends a request message to the fourth network element or is triggered by the internal implementation of the PCF, thereby triggering the fourth network element to send the second policy information to the third network element.
  • Method 2 triggered by the fifth and sixth messages, thereby triggering the fourth network element to send the second policy information to the third network element.
  • Method 3 The first network element is the same as the third network element, and is triggered by the sixth message, thereby triggering the fourth network element to send the second policy information to the third network element.
  • Figure 5 is a flowchart illustrating a possible implementation of an embodiment of the present application.
  • the first terminal device is UE1
  • the second terminal device is UE2
  • the first network element of the core network is AMF1
  • the second network element is PCF1
  • the third network element is AMF2.
  • UE1 and UE2 are associated with each other.
  • RAN1 and RAN2 are the access networks corresponding to UE1 and UE2, respectively.
  • step S510 UE1 sends a registration request/multi-access service request, i.e., a second message, to AMF1 .
  • the second message may include multi-access indication information.
  • step S520 AMF1 interacts with UDM to complete the authorization/contract check.
  • step S530 AMF1 sends a multi-access policy acquisition request to PCF1, that is, a third message including UE1 access network information.
  • step S540 PCF1 feeds back a multi-access policy, i.e., a fourth message, to AMF1.
  • the multi-access policy includes the first policy information of UE1 and the second policy information of UE2.
  • the multi-access policy information may also be referred to as the first policy information.
  • step S550 AMF1 sends a registration response/multi-access service response to UE1, that is, a first message including a multi-access policy.
  • step S560 UE1 and UE2 perform multi-access policy synchronization.
  • step S570a UE1 performs a network selection and registration process.
  • step S570b UE2 performs a network selection and registration process.
  • Figure 6 is a flow chart illustrating another possible implementation of an embodiment of the present application.
  • the first terminal device is UE1
  • the second terminal device is UE2
  • the first network element of the core network is AMF1
  • the second network element is PCF1
  • the third network element is AMF2
  • the fourth network element is PCF2.
  • UE1 and UE2 are associated with each other.
  • RAN1 and RAN2 are the access networks corresponding to UE1 and UE2, respectively.
  • step S601 UE1 sends a registration request/multi-access service request, i.e., a second message, to AMF1.
  • the second message may include multi-access indication information.
  • step S602 AMF1 interacts with UDM to complete the authorization/contract check.
  • step S603 AMF1 sends a multi-access policy acquisition request to PCF1, that is, a third message including UE1 access network information.
  • step S604 PCF1 sends a multiple access request to PCF2, that is, a ninth message including UE2 ID and multiple access indication information.
  • step S605 PCF1 feeds back the multi-access policy to AMF1, that is, the fourth message including the UE1 policy (first policy information).
  • step S606 AMF1 sends a registration response/multi-access service response to UE1, that is, a first message including the first policy information.
  • step S607 AMF1 sends a multiple access request to AMF2, that is, a fifth message including UE2ID and multiple access indication information.
  • step S608 AMF2 sends a multi-access policy acquisition request to PCF2, that is, a sixth message including UE2 access network information.
  • step S609 PCF2 feeds back the multi-access policy to AMF2, that is, the seventh message including the UE2 policy (second policy information).
  • step S610 AMF2 sends a registration response/multi-access service response to UE2, that is, an eighth message including the second policy information.
  • step S611a UE1 performs a network selection and registration process.
  • step S611b UE2 performs a network selection and registration process.
  • FIG7 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 700 shown in FIG7 includes a first terminal device.
  • the terminal device 700 includes a receiving unit 710 .
  • the receiving unit 710 can be used to receive a first message sent by a first network element of the core network, where the first message contains first policy information, and the first policy information is used to determine one or more of the following information: access network information of the first terminal device; access network information of the second terminal device associated with the first terminal device.
  • the first policy information is used to indicate a correspondence between access network information and priority information.
  • the corresponding relationship is a corresponding relationship under the first condition
  • the first policy information is further used to indicate the first condition.
  • the first condition is associated with area information and/or access network information.
  • the access network information includes one or more of the following information: access network type, type of wireless access technology, and PLMN information.
  • the terminal device 700 also includes a first sending unit, which can be used to send a second message to the first network element before receiving the first message sent by the first network element, where the second message includes first information, and the first information is used to request service transmission through multiple access networks.
  • a first sending unit which can be used to send a second message to the first network element before receiving the first message sent by the first network element, where the second message includes first information, and the first information is used to request service transmission through multiple access networks.
  • the first information includes an identifier of the second terminal device.
  • the second message is a registration request message.
  • the terminal device 700 further includes a second sending unit, which can be used to send second policy information to the second terminal device, where the second policy information is used to determine the access network information of the second terminal device.
  • a second sending unit which can be used to send second policy information to the second terminal device, where the second policy information is used to determine the access network information of the second terminal device.
  • the first network element is AMF or MME.
  • FIG 8 is a schematic diagram of a core network device according to an embodiment of the present application.
  • the core network device 800 shown in Figure 8 is a first network element of the core network.
  • the core network device 800 includes a first sending unit 810 .
  • the first sending unit 810 can be used to send a first message to a first terminal device, where the first message includes first policy information, and the first policy information is used to determine one or more of the following information: access network information of the first terminal device; access network information of a second terminal device associated with the first terminal device.
  • the first policy information is used to indicate a correspondence between access network information and priority information.
  • the access network information includes one or more of the following information: access network type, type of wireless access technology, and PLMN information.
  • the core network device 800 also includes a first receiving unit, which can be used to receive a second message sent by the first terminal device before sending the first message to the first terminal device, where the second message contains first information, and the first information is used to request service transmission through multiple access networks.
  • a first receiving unit which can be used to receive a second message sent by the first terminal device before sending the first message to the first terminal device, where the second message contains first information, and the first information is used to request service transmission through multiple access networks.
  • the first information includes an identifier of the second terminal device.
  • the second message is a registration request message.
  • the core network device 800 further includes a second sending unit, which is configured to send a third message to the second network element, where the third message is used to request the first policy information.
  • a second sending unit which is configured to send a third message to the second network element, where the third message is used to request the first policy information.
  • the core network device 800 further includes a second receiving unit, configured to receive a fourth message sent by the second network element, where the fourth message includes the first policy information.
  • the third message includes access network information of the first terminal device.
  • the second network element is a PCF.
  • the core network device 800 also includes a third sending unit, which can be used to send a fifth message to the third network element, and the fifth message includes one or more of the following: first information for requesting service transmission to the terminal device through multiple access networks; an identifier of the second terminal device.
  • the third network element is AMF or MME.
  • the core network device 800 further includes a third receiving unit, which is configured to receive a seventh message sent by the fourth network element, where the seventh message includes the second policy information.
  • the core network device 800 further includes a fifth sending unit, which can be used to send an eighth message to the second terminal device, where the eighth message includes the second policy information.
  • a fifth sending unit which can be used to send an eighth message to the second terminal device, where the eighth message includes the second policy information.
  • the sixth message includes access network information of the second terminal device.
  • the first network element is AMF or MME.
  • the first receiving unit 910 can be used to receive a third message sent by the first network element of the core network, where the third message is used to request first policy information, and the first policy information is used to determine one or more of the following information: access network information of the first terminal device; access network information of the second terminal device associated with the first terminal device.
  • the core network device 900 further includes a first sending unit, which can be used to send a fourth message to the first network element, where the fourth message includes the first policy information.
  • a first sending unit which can be used to send a fourth message to the first network element, where the fourth message includes the first policy information.
  • the first policy information is used to indicate a correspondence between access network information and priority information.
  • the corresponding relationship is a corresponding relationship under a first condition
  • the first policy information is further used to indicate the first condition
  • the first condition is associated with area information and/or access network information.
  • the core network device 900 further includes a second sending unit, which can be used to send a seventh message to the first network element or the third network element, where the seventh message includes the second policy information.
  • a second sending unit which can be used to send a seventh message to the first network element or the third network element, where the seventh message includes the second policy information.
  • the sixth message includes access network information of the second terminal device.
  • the third network element is AMF or MME.
  • the core network device 900 also includes a third sending unit, which can be used to send a ninth message to the fourth network element, and the ninth message includes one or more of the following information: first information for requesting service transmission to the terminal device through multiple access networks; an identifier of the second terminal device.
  • the fourth network element is a PCF.
  • the first network element is AMF or MME.
  • the device 1000 may include one or more processors 1010.
  • the processor 1010 may support the device 1000 to implement the method described in the above method embodiment.
  • the processor 1010 may be a general-purpose processor or a special-purpose processor.
  • the processor may be a central processing unit (CPU).
  • the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the present application also provides a computer-readable storage medium for storing a program.
  • the computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.
  • the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.
  • the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.
  • the term "and/or” is simply a description of the association relationship between related objects, indicating that three relationships can exist.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this document generally indicates that the related objects are in an "or” relationship.
  • the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof.
  • all or part of the embodiments can be implemented in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital versatile disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

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Abstract

La présente invention concerne un procédé de communication sans fil, un dispositif terminal et un dispositif de réseau central. Le procédé comprend les étapes suivantes : un premier dispositif terminal reçoit un premier message envoyé par un premier élément de réseau d'un réseau central, le premier message comprenant des premières informations de politique, et les premières informations de politique étant utilisées pour déterminer une ou plusieurs des d'informations suivantes : des informations de réseau d'accès du premier dispositif terminal ; et des informations de réseau d'accès d'un second dispositif terminal associé au premier dispositif terminal. Dans des modes de réalisation de la présente demande, le premier dispositif terminal et le second dispositif terminal peuvent sélectionner un réseau d'accès sur la base des premières informations de politique et effectuer un enregistrement.
PCT/CN2024/077060 2024-02-08 2024-02-08 Procédé de communication sans fil, dispositif terminal et dispositif de réseau central Pending WO2025166785A1 (fr)

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