CN118020348A

CN118020348A - Wireless communication method, terminal equipment and access network equipment

Info

Publication number: CN118020348A
Application number: CN202180102581.8A
Authority: CN
Inventors: 杨皓睿
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2024-05-10
Also published as: WO2023092610A1

Abstract

The embodiment of the application provides a wireless communication method, terminal equipment and access network equipment, wherein the method comprises the following steps: acquiring a PLMN list; wherein the PLMN list is at least one of the following: information stored in USIM, information obtained through NAS signaling, or information determined by UDM; and selecting PLMN in the PLMN list based on the network slice of the terminal equipment. The application introduces network slicing of the terminal device when selecting PLMN in the PLMN list, and designs the PLMN list as at least one of the following: information stored in USIM, information obtained through NAS signaling, or information determined by UDM; the terminal equipment can select the network based on the network slice of the terminal equipment, so that PLMN more suitable for the terminal equipment can be selected, and the communication quality is improved.

Description

Wireless communication method, terminal equipment and access network equipment

Technical Field

The embodiment of the application relates to the field of communication, and more particularly relates to a wireless communication method, terminal equipment and access network equipment.

Background

Up to now, the network slicing (slicing) technique involves only core network nodes. Specifically, the network side may select an appropriate access management Function (ACCESS MANAGEMENT Function, AMF) according to the network slice reported by the terminal device to establish a service session between the terminal device and the network side. Specifically, a Non-Access Stratum (NAS) of the terminal device triggers the Access Stratum (AS) to read system information of surrounding cells of the terminal device, and obtain public land mobile network (Public Land Mobile Network, PLMN) Identification (ID) to which the surrounding cells belong from the system information; then, the access layer of the terminal device reports the obtained PLMN ID to the NAS layer of the terminal device, so that the NAS layer can select the final PLMN from the NAS layer.

However, with the development of communication standards, how to select a PLMN more suitable for a terminal device to improve communication quality is still a technical problem to be solved in the art.

Disclosure of Invention

The embodiment of the application provides a wireless communication method, terminal equipment and access network equipment, which can select PLMN more suitable for the terminal equipment and improve communication quality.

In a first aspect, the present application provides a wireless communication method, comprising:

acquiring a Public Land Mobile Network (PLMN) list; wherein the PLMN list is at least one of the following: information stored in a Universal Subscriber Identity Module (USIM), information acquired through non-access stratum (NAS) signaling and information determined by Unified Data Management (UDM);

And selecting PLMN in the PLMN list based on the network slice of the terminal equipment.

In a second aspect, the present application provides a wireless communication method, comprising:

Sending a system message;

the system message includes public land mobile network PLMN where surrounding cells are located, and the PLMN where the surrounding cells are located is used for terminal equipment to select PLMN.

In a third aspect, the present application provides a wireless communication method, comprising:

Receiving a registration request sent by terminal equipment; the registration request comprises third indication information, wherein the third indication information is used for indicating whether the terminal equipment has the capability of selecting a network based on network slicing;

Sending a list request to a Unified Data Management (UDM), wherein the list request comprises the third indication information;

receiving a Public Land Mobile Network (PLMN) list sent by the UDM;

And sending the PLMN list to the terminal equipment.

In a fourth aspect, the present application provides a wireless communication method, including:

Receiving a list request sent by a mobile management function AMF, wherein the list request comprises third indication information, and the third indication information is used for indicating whether terminal equipment has the capability of selecting a network based on network slicing;

determining a public land mobile network, PLMN, list based on the third indication information;

And sending the PLMN list to the AMF.

In a fifth aspect, the present application provides a terminal device for performing the method of the first aspect or each implementation manner thereof. Specifically, the terminal device includes a functional module for executing the method in the first aspect or each implementation manner thereof.

In one implementation, the terminal device may include a processing unit for performing functions related to information processing. For example, the processing unit may be a processor.

In one implementation, the terminal device may include a transmitting unit and/or a receiving unit. The transmitting unit is configured to perform a function related to transmission, and the receiving unit is configured to perform a function related to reception. For example, the transmitting unit may be a transmitter or a transmitter and the receiving unit may be a receiver or a receiver. For another example, the terminal device is a communication chip, the sending unit may be an input circuit or an interface of the communication chip, and the sending unit may be an output circuit or an interface of the communication chip.

In a sixth aspect, the present application provides an access network device for performing the method of the second aspect or implementations thereof. In particular, the access network device comprises functional modules for performing the method of the second aspect or implementations thereof described above.

In one implementation, the access network device may include a processing unit to perform information processing related functions. For example, the processing unit may be a processor.

In one implementation, the access network device may include a transmitting unit and/or a receiving unit. The transmitting unit is configured to perform a function related to transmission, and the receiving unit is configured to perform a function related to reception. For example, the transmitting unit may be a transmitter or a transmitter and the receiving unit may be a receiver or a receiver. For another example, the access network device is a communication chip, the receiving unit may be an input circuit or an interface of the communication chip, and the sending unit may be an output circuit or an interface of the communication chip.

In a seventh aspect, the present application provides a core network device configured to perform the method in the third aspect or the fourth aspect or each implementation manner thereof. In particular, the core network device comprises functional modules for performing the methods of the third or fourth aspect or implementations thereof described above.

In one implementation, the core network device may include a processing unit to perform information processing related functions. For example, the processing unit may be a processor.

In one implementation, the core network device may include a transmitting unit and/or a receiving unit. The transmitting unit is configured to perform a function related to transmission, and the receiving unit is configured to perform a function related to reception. For example, the transmitting unit may be a transmitter or a transmitter and the receiving unit may be a receiver or a receiver. For another example, the core network device is a communication chip, the receiving unit may be an input circuit or an interface of the communication chip, and the transmitting unit may be an output circuit or an interface of the communication chip.

In a fifth aspect, the present application provides a terminal device comprising a processor and a memory. The memory is configured to store a computer program, and the processor is configured to invoke and execute the computer program stored in the memory, so as to perform the method in the first aspect or each implementation manner thereof.

In one implementation, the processor is one or more and the memory is one or more.

In one implementation, the memory may be integrated with the processor or separate from the processor.

In one implementation, the terminal device further includes a transmitter (transmitter) and a receiver (receiver).

In an eighth aspect, the present application provides a terminal device, including a processor and a memory. The memory is configured to store a computer program, and the processor is configured to invoke and execute the computer program stored in the memory, so as to perform the method in the first aspect or each implementation manner thereof.

In a ninth aspect, the present application provides an access network device comprising a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the second aspect or various implementation manners thereof.

In one implementation, the access network device further includes a transmitter (transmitter) and a receiver (receiver).

In a tenth aspect, the present application provides a core network device, comprising a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the third aspect or the fourth aspect or each implementation manner thereof.

In one implementation, the core network device further includes a transmitter (transmitter) and a receiver (receiver).

In an eleventh aspect, the present application provides a chip for implementing the method in any one of the first to fourth aspects or each implementation thereof. Specifically, the chip includes: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method as in any one of the first to fourth aspects or implementations thereof described above.

In a twelfth aspect, the present application provides a computer-readable storage medium storing a computer program for causing a computer to perform the method of any one of the above first to fourth aspects or implementations thereof.

In a thirteenth aspect, the present application provides a computer program product comprising computer program instructions for causing a computer to perform the method of any one of the above first to fourth aspects or implementations thereof.

In a fourteenth aspect, the present application provides a computer program which, when run on a computer, causes the computer to perform the method of any one of the above-described first to fourth aspects or implementations thereof.

Based on the above technical solution, the present application introduces network slicing of a terminal device when selecting a PLMN in a PLMN list, and designs the PLMN list as at least one of the following: information stored in a Universal Subscriber Identity Module (USIM), information acquired through non-access stratum (NAS) signaling and information determined by Unified Data Management (UDM); the terminal equipment can select the network based on the network slice of the terminal equipment, so that PLMN more suitable for the terminal equipment can be selected, and the communication quality is improved.

Drawings

Fig. 1 and 2 are examples of a system framework provided by an embodiment of the present application.

Fig. 3 to 7 are another schematic flow chart of a wireless communication method according to an embodiment of the present application.

Fig. 8 is another schematic flow chart of a wireless communication method provided by an embodiment of the present application.

Fig. 9 is another schematic flow chart of a wireless communication method provided by an embodiment of the present application.

Fig. 10 is a schematic block diagram of a terminal device provided in an embodiment of the present application.

Fig. 11 is a schematic block diagram of an access network device provided in an embodiment of the present application.

Fig. 12 is a schematic block diagram of an AMF provided by an embodiment of the application.

Fig. 13 is a schematic block diagram of a UDM provided by an embodiment of the present application.

Fig. 14 is a schematic block diagram of a communication device provided by an embodiment of the present application.

Fig. 15 is a schematic block diagram of a chip provided by an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic block diagram of a wireless communication system architecture 100 provided in accordance with the present application.

As shown in fig. 1, the system architecture 100 includes a terminal device 110, an access network device 120, a core network device 130, and a Data Network (DN) 160. The core network device 130 includes a management device 140 and a gateway device 150.

In some embodiments of the present application, terminal device 110 may optionally be configured to connect to operator deployed access network device 120 via a wireless air interface, and in turn to data network 160 via core network device 130. The terminal device 110 may also be referred to as a User Equipment (UE).

For example, the terminal device 110 includes, but is not limited to: a cell phone, a computer, but may also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a smart phone, a wireless local loop (wireless local loop, WLL) station, a Personal Digital Assistant (PDA), a computer, a laptop, a handheld communication device, a handheld computing device, a satellite radio, a wireless modem card, a Set Top Box (STB), a customer premise equipment (customer premise equipment, CPE), and/or other devices for communicating over a wireless system.

In some embodiments of the present application, the access network device 120 may alternatively be referred to as AN Access Network (AN)/radio access network (radio access network, RAN) device. The access network device 120 is mainly used for implementing the functions of radio physical layer function, resource scheduling and radio resource management, radio access control, mobility management, etc. The access network device 120 may also be referred to as a 5G-AN/5G-RAN node.

For example, the access network device 120 includes, but is not limited to: access Point (AP), next generation base station (nb), central Unit (CU), and Distributed Unit (DU) separated form of the nb, transceiving point (transmission receive point, TRP), transmission point (transmission point, TP), or some other access node.

In some embodiments of the present application, the core network device 130 is optionally mainly used to implement functions such as connection of a call, charging, mobility management, and implementation of supplementary services.

For example, the core network device 130 may include a management device 140 and a gateway device 150. The access network device 120 may communicate with the management device 140 and the gateway device 150, respectively, and the gateway device 150 may communicate with the data network 160. The management device 140 is mainly used for device registration, security authentication, mobility management, location management, etc. of the terminal device, and the gateway device 150 is mainly used for establishing a channel with the terminal device, and forwarding data packets between the terminal device and the external data network on the channel.

In some embodiments of the present application, the data network 160 may optionally correspond to a plurality of different service domains, such as an IP multimedia subsystem (IP multimedia subsystem, IMS), the Internet, internet protocol television (Internet protocol television, IPTV), other operator service domains, etc., mainly for providing a plurality of data service to terminal devices.

For example, the data network 160 may include network devices such as servers (including servers providing multicast services), routers, gateways, and the like.

It should be noted that fig. 1 is only an exemplary architecture diagram, and should not be construed as limiting itself.

For example, the network architecture 100 may include other functional units or functional entities in addition to the functional units shown in fig. 1.

Fig. 2 is an example of the system architecture shown in fig. 1.

As shown in fig. 2, the management device 140 may include functional units such as a management device access and mobility management function (access & mobility function, AMF), a session management function (session management function, SMF), and a policy control function (policy control function, PCF). The gateway device 150 may include functional units such as user plane functions (user plane function, UPF) that may operate independently or may be combined to implement certain control functions.

In other words, the AMF, SMF and PCF may be combined together as a management device for performing access control and mobility management functions such as access authentication, security encryption, location registration, etc. of the terminal device, session management functions such as setting up, releasing and changing a user plane transmission path, etc., and functions for analyzing some slice (slice) related data (e.g. congestion) and terminal device related data. The UPF serves as gateway equipment to mainly perform functions such as routing forwarding of user plane data, for example, filtering data messages of terminal equipment, transmitting/forwarding data, controlling rate, generating charging information, and the like.

As shown in fig. 2, the terminal device 110 may establish a control plane signaling connection with the AMF through NG interface 1 (NG 1, N1); access network device 120 may establish a control plane signaling connection with the AMF through NG interface 2 (NG 2, N2); the access network device 120 may establish a user plane data connection with the UPF through the NG interface 3 (NG 3, N3); the UPF may establish a control plane signaling connection with the SMF through NG interface 4 (NG 4, N4); the UPF may interact user plane data with the data network through NG interfaces 6 (NG 6, N6).

Of course, FIG. 2 is merely an example of the present application and should not be construed as limiting the application.

For example, the terminal device 110 may establish an air interface connection with the access network device 120 through an NR interface, for transmitting user plane data and control plane signaling; the AMF may establish a control plane signaling connection with the SMF through NG interface 11 (NG 11, N11); the SMF may establish a control plane signalling connection with the PCF via NG interface 7 (NG 7, N7).

It should be noted that, the network architecture 100 of the embodiment of the present application may support a PDU connection service, where a PDU packet is exchanged between the UE and the DN.

For example, the terminal device 110 exchanges PDU packets between the data network 160. The terminal device implements the PDU session connection by initiating establishment of a PDU session. After a single PDU session is established, a data transmission path between the terminal device 110 and the data network 160 is established. In other words, a PDU session refers to a process of communication between the terminal device 110 and the data network 160.

In addition, the terminal device 110 may establish multiple PDU session connections, where the SMF corresponding to each PDU session may be different or the same. For example, the terminal device 110 may be connected to the same data network through different UPFs. In other words, a PDU session may have multiple N6 interfaces at the same time. The UPF connecting each N6 interface is referred to as a PDU session anchor, each providing a different path to the same data network. The terminal device 110 may establish a plurality of PDU sessions, each of which may include a plurality of Data Radio Bearers (DRBs) on the RAN side.

In some embodiments of the present application, the PDU packet may optionally include at least one of the following information, an international mobile subscriber identity (International Mobile Subscriber Identity, IMSI), an international mobile equipment identity (International Mobile Equipment Identity, MEI), a PDU session Identification (ID), a session type (IPv 4, IPv6, IPv4v6, and ethernet frames), an uplink and downlink rate, a charging ID, roaming status information, IP information of the terminal device, policy control Function device (Policy Control Function, PCF) information, quality of service (Quality of service, qoS) information, tunnel information, destination address, session management Function (Session Management Function, SMF) identification, slicing information (if supported), default data radio bearer (Data Radio Bearer, DRB) information, a data network name, access management Function (ACCESS MANAGEMENT Function, AMF) information, user location information, session management information, UPF ID, online charging identification, offline charging identification, and so on.

The terminal device 110 needs to access to a network slice before transmitting data. In other words, the user plane connection of the terminal device 110 and the data network 160 may be established by means of network slicing. For example, after access network device 120 selects an AMF capable of supporting the required network slice, one or more PDU sessions connected to data network 160 may be established through the network slice. Optionally, different network slices have different single network slice selection assistance information (Single Network Slice Selection Assistance Information, S-NSSAI). In other words, S-NSSAI may be used to identify a network slice.

Each PDU session may have multiple quality of service flows (Quality of Service Flow, qoS flows), whereby data communications that will be subject to different network slices and different transmission performance requirements (e.g., reliability, transmission delay, transmission rate, etc.) may be carried by different protocol data unit (Protocol Data Unit, PDU) sessions (session). For example, the network may carry enhanced mobile Ultra-wideband (Enhance Mobile Broadband, eMBB) and high-reliability low-latency communications (Ultra-Reliable and Low Latency Communication, URLLC) traffic over different PDU sessions, respectively.

Taking the downlink direction as an example, a Non-Access Stratum (NAS) service data Flow (SERVICE DATA Flow, SDF) template (template) of the core network device 130 maps different data packets from the application layer to different QoS flows in different PDU sessions in a classified manner, and makes them be sent to the Access network device 120 in different PDU sessions. The access network device 120 maps the QoS Flow to different data radio bearers (Data Radio Bearer, DRBs) according to its Identification (ID) information and sends it over the air to the UE. Similarly, for upstream data, similar operations may be employed.

In order to facilitate understanding of the solution provided by the present application, a PLMN selection (i.e. network selection) related solution will be described below.

The terminal device performs public land mobile network (Public Land Mobile Network, PLMN) selection (selection) immediately after power-on or entering idle state.

When PLMN selection is required, the chip of the terminal device reads the files of home PLMN Selector and access Technology (HPLMN Selector WITH ACCESS Technology), user-controlled PLMN Selector with access Technology (User Controlled PLMN Selector WITH ACCESS Technology), forbidden PLMN (Forbidden PLMNs), equivalent home PLMN (Equivalent HPLMN), operator-controlled PLMN Selector with access Technology (Operator controlled PLMN Selector WITH ACCESS Technology) and the like from the subscriber identity module (subscriber identity module, SIM) card.

A Non-Access Stratum (NAS) of the chip triggers the Access Stratum to read system information of surrounding cells, and PLMN Identifications (IDs) of the surrounding cells are obtained from the system information; after the access layer acquires the PLMN ID, the PLMN ID is reported to the NAS layer, and the NAS layer selects the final PLMN from the PLMN ID. In addition, the access layer also reports the signal quality of the PLMN below-110 dB to the NAS layer, namely the information reported by the access layer comprises the PLMN ID and the signal quality.

The NAS layer follows the following sequence when selecting a PLMN:

1. the HPLMN (if EHPLMN list does not exist or is empty) or the highest priority EHPLMN (equivalent HPLMN) is available (if EHPLMN list exists )(either the HPLMN(if the EHPLMN list is not present or is empty)or the highest priority EHPLMN(equivalent HPLMN)that is available(if the EHPLMN list is present)).

Alternatively, the HPLMN ID may be obtained from the international mobile subscriber identity (International Mobile Subscriber Identification Number, IMSI) of the SIM card. For example, the HPLMN may be a mobile country code (Mobile Country Codes, MCC) and a mobile network code (Mobile Network Codes, MNC) in the IMSI.

Optionally, the higher the front the HPLMN Selector (WITH ACCESS Technology) rank with access Technology in the SIM card, the higher its priority. For example, the higher the front priority of the HPLMN Selector (WITH ACCESS Technology) bank with access Technology is in the SIM card. For example, for a 4G card, if the access technology is configured to be LTE greater than or equal to 2G, the terminal device may preferentially select the 4G network and the LTE access technology when selecting the PLMN, and when there is no 4G coverage in the surrounding, the terminal device may select the 2G network and the LTE access technology.

Alternatively, the EHPLMN may be considered to provide the same service to the UE as the HPLMN, i.e., the EHPLMN and HPLMN function the same. The priority of the access technology is equally applicable to EHPLMNs.

2. Each PLMN/access technology combination (in order of priority) in the "access technology for user controlled PLMN selector" data file in SIM )(each PLMN/access technology combination in the"User Controlled PLMN Selector with Access Technology"data file in the SIM(in priority order)).

3. Each PLMN/access technology combination in an "operator controlled PLMN selector with access technology" data file in SIM (prioritized) or stored in ME (prioritized) (each PLMN/access technology combination in the"Operator Controlled PLMN Selector with Access Technology"data file in the SIM(in priority order)or stored in the ME(in priority order)).

Optionally, each PLMN may be followed by one or more access technologies in an "operator controlled PLMN selector with access technologies" data file, with the higher priority of the rank being higher.

4. Other PLMN/access technology combinations (other PLMNs/access technology combinations WITH RECEIVED HIGH quality signal in random order) that receive high quality signals in random order.

5. Other PLMN/access technology combinations (other PLMNs/access technology combinations in order of DECREASING SIGNAL quality) arranged in descending order of signal quality.

A fifth Generation mobile communication technology (5G) network has network slices starting from release 15. Each network slice may correspond to traffic of one or more terminals. The identification of the network slice may select auxiliary information (Single-Network Slice Selection Assistance Information, S-NSSAI) for a Single network slice. S-NSSAI includes two parts, namely Slice/service type (Slice/SERVICE TYPE, SST) and Slice differentiator (Slice Differentiator, SD). SST may be a standard value, for example 1 to 5.SST and SD may also be non-standard values. The combination of one or more S-NSSAI is NSSAI.

Fig. 3 shows a schematic flow chart of a wireless communication method 210 according to an embodiment of the application, which method 210 may be performed by a terminal device. The terminal device shown in fig. 3 may be the terminal device shown in fig. 1.

As shown in fig. 3, the method 210 includes:

S211, acquiring a public land mobile network (Public Land Mobile Network, PLMN) list; wherein the PLMN list is at least one of the following: information stored in a universal subscriber identity card (Universal Subscriber Identity Module, USIM), information acquired through Non-Access Stratum (NAS) signaling, or information determined by Unified data management (Unified DATA MANAGEMENT, UDM);

s212, selecting PLMN in the PLMN list based on the network slice of the terminal equipment.

The terminal device illustratively selects a PLMN among the PLMNs that supports network slicing of the terminal device. Specifically, after the non-access layer of the terminal device acquires the PLMN list, selecting a PLMN supporting the network slice of the terminal device and supporting or allowing network selection based on the network slice in the PLMN list, or selecting a PLMN supporting the network slice of the terminal device and supporting or allowing corresponding to the access technology based on the network slice selection based on the network slice in the PLMN list. Alternatively, one PLMN may correspond to one or more access technologies.

In this embodiment, when selecting a PLMN in a PLMN list, a network slice of the terminal device is introduced, and the PLMN list is designed to be at least one of the following: information stored in a Universal Subscriber Identity Module (USIM), information acquired through non-access stratum (NAS) signaling and information determined by Unified Data Management (UDM); the terminal equipment can select the network based on the network slice of the terminal equipment, so that PLMN more suitable for the terminal equipment can be selected, and the communication quality is improved.

The PLMN list may be, for example, a Profile file stored in the USIM.

The PLMN list may be information updated by NAS signaling, for example.

The PLMN list may be, for example, information determined by the UDM and configured to the terminal device by means of the AMF.

In some embodiments, the PLMN list includes: a first PLMN and first indication information corresponding to the first PLMN; the first indication information is used for indicating whether the first PLMN supports or allows network-based slice selection.

It should be noted that, in the embodiment of the present application, the term "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. In connection with the present application, a may be the first indication information, and B may be whether the first PLMN supports or allows network-based slice selection.

As an example, if the value of the first indication information is a first value, the first PLMN is indicated to support or allow network slice selection based on the first PLMN; and if the value of the first indication information is a second value, indicating that the first PLMN does not support or does not allow the network-based slice network selection. Optionally, the first value is 1 and the second value is 0. Optionally, the first value is 0 and the second value is 1.

As another example, it may also be indicated whether the first PLMN supports or allows network-based slice selection by whether the first indication information is present. For example, if the first indication information exists, indicating that the first PLMN supports or allows network selection based on network slicing; and if the first indication information does not exist, indicating that the first PLMN does not support or does not allow the network-based slice network selection.

Illustratively, a first indication information of whether the first PLMN corresponds to supporting or allowing network slice-based network selection is added to the PLMN list. If the terminal device needs to perform network slice-based selection, only PLMNs supporting or allowing network slice-based selection are considered.

Illustratively, an Identification (ID) of the first PLMN corresponds to the first indication information.

Illustratively, the PLMN list includes one first PLMN or a plurality of first PLMNs.

Illustratively, the PLMN list includes one first PLMN and first indication information corresponding to the one first PLMN.

The PLMN list includes a plurality of first PLMNs and first indication information corresponding to each of the plurality of PLMNs.

Illustratively, the first PLMN may generally refer to any PLMN in the PLMN list for which corresponding first indication information exists.

Illustratively, the PLMN list may include information shown in table 1:

TABLE 1

As shown in table 1, each PLMN may correspond to a slice-based PLMN selection support indication (i.e., an indication of whether or not network-based slice selection is supported or allowed).

In some implementations, for each PLMN, the corresponding slice-based PLMN selection support indication may be carried by the newly added 1 byte; for example, the last 1 bit of the newly added 1 byte may be utilized to carry a slice-based PLMN selection support indication. Taking the first PLMN in the PLMN list shown in table 1 as an example, the information for indicating the first PLMN occupies 3 bytes, and the 2 bytes for indicating the information for the access technology corresponding to the first PLMN occupy 2 bytes, and the slice-based PLMN selection support indication corresponding to the first PLMN may be carried by additionally adding 1 byte.

In other implementations, for each PLMN, a corresponding slice-based PLMN selection support indication may be carried in reserved bits in the 3 bytes used to indicate the PLMNs. Taking the first PLMN in the PLMN list shown in table 1 as an example, the information for indicating the first PLMN occupies 3 bytes, and the information for indicating the access technology corresponding to the first PLMN occupies 2 bytes, where the slice-based PLMN selection support indication corresponding to the first PLMN may be carried by reserved bits in the 3 bytes occupied by the information for indicating the first PLMN.

Of course, table 1 is only an example of the present application and should not be construed as limiting the application.

For example, in other alternative embodiments, the PLMN selection support indication based on the slice corresponding to the PLMN may also be carried by reserved bits in 2 bytes occupied by the information for indicating the access technology corresponding to the PLMN.

In some embodiments, the PLMN list includes: a second PLMN, at least one access technology corresponding to the second PLMN, and at least one second indication information corresponding to the at least one access technology respectively; the at least one second indication information is used to indicate whether the at least one access technology under the second PLMN supports or allows network based network slicing network selection.

It should be noted that, in the embodiment of the present application, the term "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. In connection with the present application, a may be the second indication information and B may be whether a second access technology under the second PLMN supports or allows network-based slice selection.

As an example, if the value of the second indication information is the first value, indicating that the corresponding access technology under the second PLMN supports or allows network-based slice selection; and if the value of the second indication information is a second value, indicating that the corresponding access technology under the second PLMN does not support or does not allow network selection based on network slicing. Optionally, the first value is 1 and the second value is 0. Optionally, the first value is 0 and the second value is 1.

As another example, if the second indication information exists, indicating that the corresponding access technology under the second PLMN supports or allows network-based slice selection; and if the second indication information does not exist, indicating that the corresponding access technology under the second PLMN does not support or does not allow the network-based slice network selection.

Illustratively, second indication information of whether to support or allow network slice-based network selection corresponding to the access technology under the second PLMN is added to the PLMN list. If the terminal device needs to perform network selection based on the network slice, only PLMNs corresponding to access technologies supporting or allowing the network selection based on the network slice are considered.

Illustratively, the PLMN list includes one second PLMN or a plurality of second PLMNs.

Illustratively, the PLMN list includes: one second PLMN, at least one access technology corresponding to the one second PLMN, and at least one second indication information corresponding to at least one access technology under the one second PLMN, respectively.

Illustratively, the PLMN list includes: the system comprises a plurality of second PLMNs, at least one access technology corresponding to each of the plurality of second PLMNs, and at least one second indication information corresponding to at least one access technology under each of the plurality of second PLMNs respectively.

For example, the second PLMN may generally refer to any PLMN in which there is a corresponding at least one access technology in the PLMN list and there is at least one second indication information corresponding to the corresponding at least one access technology, respectively.

Illustratively, the PLMN list may include information shown in table 2:

TABLE 2

As shown in table 2, one access technology under each PLMN may correspond to one slice-based PLMN selection support indication (i.e., an indication of whether or not network-based slice selection is supported or allowed).

In some implementations, for each access technology under each PLMN, the corresponding slice-based PLMN selection support indication may be carried by the newly added 1 byte; for example, the last 1 bit of the newly added 1 byte may be utilized to carry a slice-based PLMN selection support indication. Taking the first PLMN in the PLMN list shown in table 2 as an example, the information for indicating the first PLMN occupies 3 bytes, the information for indicating the access technology corresponding to the first PLMN occupies 2 bytes, and the slice-based PLMN selection support indication corresponding to the access technology under the first PLMN may be carried by additionally adding 1 byte.

In other implementations, for each access technology under each PLMN, the corresponding slice-based PLMN selection support indication may be carried in reserved bits in 2 bytes occupied by the information indicating the access technology corresponding to the PLMN. Taking the first PLMN in the PLMN list shown in table 2 as an example, the information for indicating the first PLMN occupies 3 bytes, and the information for indicating the access technology corresponding to the first PLMN occupies 2 bytes, where the slice-based PLMN selection support indication corresponding to the access technology under the first PLMN may be carried by reserved bits in the 2 bytes occupied by the information for indicating the access technology corresponding to the first PLMN.

Of course, table 2 is only an example of the present application and should not be construed as limiting the application.

For example, in other alternative embodiments, the slice-based PLMN selection support indication may also be carried in reserved bits in 2 bytes for indicating the access technology to which the PLMN corresponds.

In some embodiments, when the PLMN list is information stored in the USIM or information acquired through the NAS signaling, the network slice of the terminal device includes a network slice corresponding to a default service; and when the PLMN list is determined by the UDM, the network slice of the terminal equipment comprises the network slice requested by the terminal equipment.

The terminal device requested network slice is illustratively determined by the terminal device requested network slice selection assistance information (Network Slice Selection Assistance Information, NSSAI).

In some embodiments, the PLMN list is information determined for the UDM; the S211 may include:

Sending a registration request to an access management Function (ACCESS MANAGEMENT Function, AMF); the registration request comprises third indication information, wherein the third indication information is used for indicating whether the terminal equipment has the capability of selecting a network based on network slicing;

The PLMN list sent by Unified data management (Unified DATA MANAGEMENT, UDM) is received by the AMF.

In other words, the terminal device may obtain the PLMN list determined by the UDM through a registration procedure.

The terminal device sends a registration request to an AMF, and after the AMF receives the registration request, the AMF obtains a PLMN list determined by the UDM, and sends the PLMN list to the terminal device.

It should be noted that, in the embodiment of the present application, the term "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. In connection with the present application, a may be the third indication information, and B may refer to whether the terminal device has a capability of selecting a network based on network slicing.

As an example, if the value of the third indication information is the first value, the terminal device is indicated to have the capability of selecting a network based on network slicing; and if the value of the third indication information is the second value, indicating that the terminal equipment does not have the capability of selecting the network based on the network slicing. Optionally, the first value is 1 and the second value is 0. Optionally, the first value is 0 and the second value is 1.

As another example, if the third indication information exists, indicating that the terminal device has a capability of selecting a network based on the network slice; and if the third indication information does not exist, indicating that the terminal equipment does not have the capability of selecting the network based on the network slicing.

In some embodiments, the S211 may include:

And receiving a registration response message sent by the AMF in a registration process, wherein the registration response message comprises the PLMN list.

In an exemplary embodiment, in the registration process, the terminal device sends a registration request to an AMF, after receiving the registration request, the AMF sends a request (i.e. a list request) for requesting subscription data to a UDM, after receiving the request for requesting subscription data sent by the AMF, the UDM sends subscription data to the AMF, where the subscription data includes the PLMN list, and after receiving the subscription data, the AMF sends the registration response message to the terminal device, where the registration response message includes the PLMN list.

In some embodiments, the S211 may include:

And after registration is completed, receiving a downlink transmission message sent by the AMF, wherein the downlink transmission message comprises the PLMN list.

Illustratively, after registration is completed, the UDM sends updated subscription data to the AMF, where the updated subscription data includes the PLMN list, and after the AMF receives the subscription data, the AMF sends a downlink transmission message to the terminal device, where the downlink transmission message includes the PLMN list.

In some embodiments, the priority order of PLMNs in the PLMN list is determined from a first network slice comprising at least one of:

The network slice requested by the terminal equipment and the network slice subscribed by the terminal equipment.

Illustratively, the network slice requested by the terminal device is determined by NSSAI of the terminal device request.

Each PLMN in the PLMN list illustratively supports at least one network slice including the network slice requested by the terminal device and/or the network slice subscribed to by the terminal device.

In some embodiments, the priority order of PLMNs in the PLMN list is determined according to the number of first network slices supported by a PLMN.

Illustratively, the number of first network slices supported by the PLMN with the highest priority of PLMNs in the PLMN list is the largest.

Illustratively, the number of first network slices supported by a PLMN with a lowest priority of PLMNs in the PLMN list is minimal.

Illustratively, the priority of a PLMN in the PLMN list is proportional to the number of the first network slices supported by the PLMN.

In some embodiments, the method 210 may further comprise:

Receiving configuration information of a PLMN reselection timer sent by the UDM through the AMF;

and triggering the terminal equipment to perform PLMN reselection under the condition that the PLMN reselection timer is overtime or expired.

Illustratively, a registration response message sent by the AMF is received during registration, the registration response message including the PLMN list and the configuration information.

Illustratively, a downlink transmission message sent by the AMF is received after registration is completed, where the downlink transmission message includes the PLMN list and the configuration information.

Of course, in other alternative embodiments, the configuration information of the PLMN reselection timer may be configured by other devices besides UDM, which is not specifically limited by the present application.

In some embodiments, one network slice supported by each PLMN in the PLMN list corresponds to a timer, the timer corresponding to a third PLMN in the PLMN list is a timer with the largest or smallest duration in the timers corresponding to the network slices corresponding to the third PLMN, and the PLMN reselection timer is a timer with the largest or smallest duration in the timers corresponding to PLMNs in the PLMN list.

For example, the duration of the timer corresponding to the third PLMN may be the maximum value or the minimum value of the durations of the timers corresponding to the network slices corresponding to the third PLMN; and the duration of the PLMN reselection timer is the maximum value or the minimum value of the duration of the timer corresponding to the PLMN in the PLMN list.

Of course, in other alternative embodiments, the duration of the timer corresponding to the third PLMN may also be an average value or other values of the duration of the timer corresponding to the network slice corresponding to the third PLMN, and the duration of the PLMN reselection timer is an average value or other values of the duration of the timer corresponding to the PLMN in the PLMN list, which is not specifically limited in the present application. For another example, in other alternative embodiments, a PLMN reselection timer may also be determined by the terminal device based on a timer corresponding to each network slice supported by each PLMN in the PLMN list. For example, the UDM may also configure a timer corresponding to each network slice supported by each PLMN in the PLMN list for the terminal device, and accordingly, the terminal device may determine that a maximum value or a minimum value in a duration of the timer corresponding to the PLMN in the PLMN list is a PLMN reselection timer; the timer corresponding to the third PLMN in the PLMN list is a timer with the largest or smallest duration in the timers corresponding to the network slices corresponding to the third PLMN.

In some embodiments, each PLMN in the PLMN list corresponds to a timer, and the PLMN reselection timer is a timer with a maximum duration or a minimum duration of the timers corresponding to PLMNs in the PLMN list.

Illustratively, the duration of the PLMN reselection timer is the maximum or minimum of the durations of the timers corresponding to PLMNs in the PLMN list.

Of course, in other alternative embodiments, the duration of the PLMN reselection timer is an average value or other value in the duration of the timer corresponding to the PLMN in the PLMN list, which is not specifically limited in the present application. For another example, in other alternative embodiments, a PLMN reselection timer may also be determined by the terminal device based on one timer for each PLMN in the PLMN list. For example, the UDM may also configure a timer corresponding to each PLMN in the PLMN list for the terminal device, and accordingly, the terminal device may determine that a maximum value or a minimum value in a duration of the timer corresponding to the PLMN in the PLMN list is a PLMN reselection timer.

In some embodiments, the PLMN reselection timer is a timer corresponding to the PLMN list.

Illustratively, the duration of the PLMN reselection timer is the duration of a timer corresponding to the PLMN list.

In some embodiments, the S212 may include:

receiving a system message, wherein the system message comprises PLMNs of surrounding cells;

Selecting a PLMN with highest priority among PLMNs of the surrounding cells and meeting the following conditions based on the order of the priority in the PLMN list from high to low:

supporting or allowing network slice-based selection of a network and supporting network slices of the terminal device; and/or

The corresponding access technology supports or allows network slice-based network selection and supports network slicing of the terminal device.

The access layer of the terminal device reads the system information of the cell at the current position and sends the system information to the non-access layer, so that the non-access layer of the terminal device can perform PLMN selection. For example, based on the order of priority from high to low in the PLMN list, selecting a PLMN with the highest priority among PLMNs where the surrounding cells are located and satisfying the following conditions:

For example, after receiving the system message, the terminal device may select, from PLMNs where the periodic cell is located, PLMNs that support or allow network slicing based on network slicing selection and support network slicing of the terminal device as candidate PLMNs, and then select a PLMN with a highest priority from the candidate PLMNs based on a priority order from high to low in the PLMN list.

In an exemplary embodiment, after receiving the system message, the terminal device may select, from PLMNs in which the periodic cell is located, PLMNs that are supported by the corresponding access technology or that are allowed to be selected based on network slicing and support network slicing of the terminal device as candidate PLMNs, and then select a PLMN with a highest priority from the candidate PLMNs based on a priority order from high to low in the PLMN list.

In some embodiments, the PLMN in which the surrounding cell is located includes a fourth PLMN corresponding to at least one second access technology; the system message further includes fourth indication information corresponding to the fourth PLMN or at least one fifth indication information corresponding to the at least one second access technology, respectively, where the fourth indication information is used to indicate that the fourth PLMN supports or allows network-based chip selection, and the at least one fifth indication information is used to indicate that the at least one second access technology supports or allows network-based chip selection, respectively.

The fourth PLMN may be, for example, any one PLMN or part of PLMNs of the PLMNs where the surrounding cells are located.

As an example, for a terminal device, the PLMN selected by the terminal device may be both the first PLMN and the fourth PLMN. For example, the indication information (i.e., the fourth indication information) included in the system message and the indication information (i.e., the first indication information) included in the PLMN list correspond to the same PLMN, and at this time, the supporting or allowing network-based slice selection may refer to both the indication information (i.e., the fourth indication information) included in the system message and the indication information included in the PLMN list being used to indicate that the same PLMN supports or allows network-based slice selection.

As another example, for a terminal device, the PLMN selected by the terminal device may be both the second PLMN and the fourth PLMN. For example, the indication information (i.e., the fifth indication information) included in the system message and the indication information (i.e., the second indication information) included in the PLMN list correspond to the same access technology under the same PLMN, and at this time, the supporting or allowing network-based slice selection may refer to both the indication information (i.e., the fifth indication information) included in the system message and the indication information (i.e., the second indication information) included in the PLMN list are used to indicate that the same access technology under the same PLMN supports or allows network-based slice selection.

It should be noted that, in the embodiment of the present application, the term "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. In connection with the present application, a may be the fourth indication information, and B may be whether the fourth PLMN supports or allows network-based slice selection; or a may be the fifth indication information, and B may be the corresponding second access technology support or permission based on network slicing network selection.

As an example, if the value of the fourth indication information is the first value, the fourth PLMN is indicated to support or allow network slice selection based on the fourth PLMN; and if the value of the fourth indication information is the second value, indicating that the fourth PLMN does not support or does not allow the network-based slice network selection. Optionally, the first value is 1 and the second value is 0. Optionally, the first value is 0 and the second value is 1.

As another example, it may also be indicated whether the fourth PLMN supports or allows network-based slice selection by the presence or absence of the fourth indication information. For example, if the fourth indication information exists, indicating that the fourth PLMN supports or allows network selection based on network slicing; and if the fourth indication information does not exist, indicating that the fourth PLMN does not support or does not allow the network-based slice network selection.

As an example, if the value of the fifth indication information is the first value, indicating that the corresponding second access technology supports or allows network-based slice selection; and if the value of the fifth indication information is a second value, indicating that the corresponding second access technology does not support or does not allow the network-based network slicing selection. Optionally, the first value is 1 and the second value is 0. Optionally, the first value is 0 and the second value is 1.

As another example, it may also be indicated whether the corresponding second access technology supports or allows network-based chip selection by the presence or absence of the fifth indication information. For example, if the fifth indication information exists, indicating that the corresponding second access technology supports or allows network-based slice selection; and if the fifth indication information does not exist, indicating that the at least one second access technology does not support or does not allow the network-based slice network selection.

In some embodiments, the system message further includes slice information for network slices supported by the fourth PLMN;

the slice information includes at least one of:

single network Slice selection assistance information (Single Network Slice Selection Assistance Information, S-NSSAI), slice groups, standardized slices, and/or service types (Slice/SERVICE TYPE, SST).

Of course, in other alternative embodiments, the system message in which the fourth indication information or the fifth indication information is located may be different from the system message in which the slice information of the network slice supported by the fourth PLMN is located, which is not specifically limited by the present application. For example, the system information block (System Information Block, SIB) in which the fourth indication information or the fifth indication information is located may be different from the SIB in which the slice information of the network slice supported by the fourth PLMN is located.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application. For example, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further. As another example, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be regarded as the disclosure of the present application.

It should be further understood that, in the various method embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present application. Further, in the embodiment of the present application, the terms "downlink" and "uplink" are used to indicate a transmission direction of a signal or data, where "downlink" is used to indicate that the transmission direction of the signal or data is a first direction of a user equipment transmitted from a station to a cell, and "uplink" is used to indicate that the transmission direction of the signal or data is a second direction of a user equipment transmitted from a cell to a station, for example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, which means that three relationships may exist. Specifically, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The wireless communication method according to the embodiment of the present application is described in detail above from the perspective of the terminal device in conjunction with fig. 3, and the wireless communication method provided by the embodiment of the present application will be described below from the access network device in conjunction with fig. 4.

Fig. 4 is a schematic flow chart of a wireless communication method 220 provided by an embodiment of the present application. The method 220 may be performed by an access network device.

As shown in fig. 4, the method 220 may include:

S221, the terminal equipment receives a system message sent by the access network equipment;

the slice information includes at least one of:

Single network slice selection assistance information S-NSSAI, slice groups, standardized slices, and/or service type SST.

Of course, in other alternative embodiments, the system message in which the fourth indication information or the fifth indication information is located may be different from the system message in which the slice information of the network slice supported by the fourth PLMN is located, which is not specifically limited by the present application. For example, the SIB in which the fourth indication information or the fifth indication information is located may be different from the SIB in which the slice information of the network slice supported by the fourth PLMN is located.

It should be understood that the steps performed by the access network device in the method 220 may refer to corresponding steps performed by the terminal device in the method 210, which are not described herein for brevity.

The wireless communication method provided by the embodiment of the present application will be described from the AMF point of view with reference to fig. 5.

Fig. 5 is a schematic flow chart of a wireless communication method 230 provided by an embodiment of the present application. The method 230 may be performed by an AMF.

As shown in fig. 5, the method 230 may include:

S231, receiving a registration request sent by a terminal device; the registration request comprises third indication information, wherein the third indication information is used for indicating whether the terminal equipment has the capability of selecting a network based on network slicing;

S232, sending a list request to a Unified Data Management (UDM), wherein the list request comprises the third indication information;

S233, receiving a public land mobile network PLMN list sent by the UDM;

and S234, the PLMN list is sent to the terminal equipment.

In some embodiments, the S234 may include:

Transmitting a registration response message to the terminal device in a registration process, wherein the registration response message comprises the PLMN list; or (b)

And after registration is completed, sending a downlink transmission message to the terminal equipment, wherein the downlink transmission message comprises the PLMN list.

In some embodiments, the terminal device requested network slice is determined by the terminal device requested network slice selection assistance information NSSAI.

In some embodiments, the method 230 may further comprise:

Receiving configuration information of a PLMN reselection timer sent by the UDM; the PLMN reselection timer is used for triggering the terminal equipment to perform PLMN reselection;

and sending the configuration information to the terminal equipment.

It should be understood that the steps performed by the AMF in the method 230 may refer to corresponding steps performed by the terminal device in the method 210, which are not described herein for brevity.

The wireless communication method provided by the embodiment of the present application will be described from the perspective of UDM with reference to fig. 6.

Fig. 6 is a schematic flow chart of a wireless communication method 240 provided by an embodiment of the present application. The method 240 may be performed by a UDM.

As shown in fig. 6, the method 240 may include:

S241, receiving a list request sent by a mobile management function (AMF), wherein the list request comprises third indication information, and the third indication information is used for indicating whether terminal equipment has the capability of selecting a network based on network slicing;

S242, determining a public land mobile network PLMN list based on the third indication information;

And S243, sending the PLMN list to the AMF.

In some embodiments, the S243 may include:

Transmitting the PLMN list to the AMF during registration; or (b)

And sending the PLMN list to the AMF after registration is completed.

In some embodiments, the S242 may include:

And when the third indication information is used for indicating that the terminal equipment has the network selection capability based on the network slice, determining the priority order of PLMNs in the PLMN list according to a first network slice, wherein the first network slice comprises at least one of the following components:

In some embodiments, the method 240 may further comprise:

transmitting configuration information of a PLMN reselection timer to the AMF;

The PLMN reselection timer is used for triggering the terminal equipment to perform PLMN reselection.

It should be understood that the steps performed by the UDM in the method 240 may refer to corresponding steps performed by the AMF in the method 230, and are not described herein for brevity.

The following describes the solution provided by the present application with reference to specific examples.

Example 1:

In this embodiment, the PLMN list is information determined for the UDM.

Fig. 7 is a schematic flow chart of a wireless communication method 300 provided by an embodiment of the present application. The method 300 may be interactively performed by a terminal device, an AMF, and an SDM. An implementation of the terminal device to obtain the PLMN list is described below with reference to fig. 7.

As shown in fig. 7, the method 300 may include:

S310, the terminal equipment sends a registration request to the AMF; the registration request includes third indication information for indicating whether the terminal device has a capability of selecting a network based on network slicing.

Illustratively, the third indication information is used to indicate that the terminal device has a capability of selecting a network based on a network slice, and the registration request further includes the network slice of the terminal device. The network slice of the terminal device includes the network slice requested by the terminal device. The network slice requested by the terminal device is determined by NSSAI requested by the terminal device.

S320, the AMF sends a list request to the UDM, the list request including the third indication information.

The list request also illustratively includes a network slice of the terminal device.

Illustratively, the AMF, upon receipt of the registration request, sends a request (i.e., a list request) to the UDM for subscription data.

And S330, the UDM determines a PLMN list based on the third indication information.

Illustratively, the priority order of PLMNs in the PLMN list is determined from a first network slice comprising at least one of:

Illustratively, the priority order of PLMNs in the PLMN list is determined based on the number of first network slices supported by the PLMNs.

S340, the UDM sends the PLMN list to the AMF.

And S350, the AMF sends the PLMN list to the terminal equipment.

In an exemplary embodiment, in the registration process, after receiving a request (i.e., a list request) sent by the AMF for requesting subscription data, the UDM sends subscription data to the AMF, where the subscription data includes the PLMN list, and after receiving the subscription data, the AMF sends the registration response message to the terminal device, where the registration response message includes the PLMN list.

Illustratively, after registration is completed, the UDM sends updated subscription data to the AMF, where the updated subscription data includes the PLMN list, and after the AMF receives the subscription data, the UDM sends a downlink transmission message to the terminal device, where the downlink transmission message includes the PLMN list.

And S360, performing PLMN reselection based on the PLMN list.

The subscription data for configuring or updating the PLMN list may further comprise configuration information of a PLMN reselection timer, wherein the terminal device may be triggered to perform PLMN reselection based on the PLMN list when the PLMN reselection timer expires.

In an exemplary embodiment, one network slice supported by each PLMN in the PLMN list corresponds to one timer, the timer corresponding to the third PLMN in the PLMN list is a timer with the largest or smallest duration in the timers corresponding to the network slices corresponding to the third PLMN, and the PLMN reselection timer is a timer with the largest or smallest duration in the timers corresponding to the PLMNs in the PLMN list.

Illustratively, each PLMN in the PLMN list corresponds to a timer, and the PLMN reselection timer is a timer with the largest duration or the smallest duration of the timers corresponding to the PLMNs in the PLMN list.

Illustratively, the PLMN reselection timer is a timer corresponding to the PLMN list.

Example 2:

In this embodiment, the terminal device selects, based on the order of priority from high to low in the PLMN list, a PLMN with the highest priority among PLMNs in which the surrounding cells are located and satisfying the following conditions:

Fig. 8 is a schematic flow chart of a wireless communication method 400 provided by an embodiment of the present application. The method 400 may be performed interactively by a terminal device and an access network device.

As shown in fig. 8, the method 400 may include:

S410, the terminal equipment receives a system message sent by the access network equipment, wherein the system message comprises PLMNs where surrounding cells are located;

S420, the terminal equipment selects a PLMN with highest priority in PLMNs of surrounding cells and meeting the following conditions based on the order of the priority from high to low in a PLMN list:

The PLMN list may be, for example, a Profile file stored in the USIM.

The PLMN list may be information updated by NAS signaling, for example.

Illustratively, the PLMN list includes: a first PLMN and first indication information corresponding to the first PLMN; the first indication information is used for indicating whether the first PLMN supports or allows network selection based on network slicing; or the PLMN list includes: a second PLMN, at least one access technology corresponding to the second PLMN, and at least one second indication information corresponding to the at least one access technology respectively; the at least one second indication information is used to indicate whether the at least one access technology under the second PLMN supports or allows network based network slicing network selection. Based on this, in S420, the terminal device may determine, based on the information in the PLMN list, whether the PLMN in which the surrounding cell is located satisfies the following condition:

It should be appreciated that, for descriptions of the first PLMN, the second PLMN, the first indication information, and the second indication information, reference may be made to corresponding descriptions in the method 210, and for avoiding repetition, a description is omitted herein.

In an exemplary embodiment, after receiving the system message, the terminal device may select, from PLMNs where the periodic cell is located, a PLMN that is supported by a corresponding access technology or that allows network slicing based on network slicing selection and supports network slicing of the terminal device as a candidate PLMN, and then select a PLMN with a highest priority from the candidate PLMNs based on a priority order from high to low in the PLMN list.

Illustratively, the PLMN in which the surrounding cell is located includes a fourth PLMN corresponding to at least one second access technology; the system message further includes fourth indication information corresponding to the fourth PLMN or at least one fifth indication information corresponding to the at least one second access technology, respectively, where the fourth indication information is used to indicate that the fourth PLMN supports or allows network-based chip selection, and the at least one fifth indication information is used to indicate that the at least one second access technology supports or allows network-based chip selection, respectively.

Illustratively, the system message further includes slice information for network slices supported by the fourth PLMN;

The slice information includes at least one of: S-NSSAI, slice group, SST.

Example 3:

in this embodiment, the UE may perform network selection by:

Step 1: if the HPLMN wants to control how the UE selects the network based on the network slice, a configuration (profile) file in the USIM card is configured, and an indication of whether the network slice-based selection is supported corresponding to the PLMN ID is added in the configuration file. The UE considers only supported PLMNs if it needs to perform network selection based on network slicing. The indication may be 0, unsupported; 1, support.

Step 2: the access layer of the UE reads the system information of the cell at the current position, and the system information comprises slice information supported by the PLMN. An indication that network-based chip selection is supported may also be included. The indication and the PLMN supported slice information may belong to different SIBs. The slice information may be represented by: S-NSSAI, slice group, normalized SST. The access layer then sends the searched PLMN and slice information to the NAS layer.

Step 3: when selecting PLMN, NAS layer of UE judges whether the PLMN supports network selection based on network slice according to the prior priority order, if so, judges whether the UE supports the network slice according to the slice information. The network slices that the UE wants may be network slices that select corresponding to default traffic based on these default traffic; the NAS layer selects the highest priority PLMN capable of supporting the desired network slice.

Step 4: the HPLMN may keep up with the content in the configuration (profile) file through NAS signaling. The UE may be configured with steering roaming transparent container (Steering of roaming transparent container) parameters.

Example 4:

fig. 9 is a schematic flow chart of a wireless communication method 430 provided by an embodiment of the present application.

As shown in fig. 9, the method 430 may include:

S431, the UE sends a registration request to the AMF.

The UE also uses the existing method at the beginning, i.e. the first time of network selection, and then initiates registration with the AMF, carrying a request (NSSAI) in a registration message and a capability indication that the UE supports network-based slice network selection.

S432, the AMF requests subscription data from the UDM.

The AMF requests the UDM for subscription data of the UE, and simultaneously sends an indication of the capability of the UE to support network slicing based network selection, which may also carry requested NSSAI.

The UDM determines the PLMN order based on the UE capability and the slice information S433, optionally a PLMN reselection timer.

The UDM decides the prioritized PLMN list(s) based on UE capabilities and slice information, the higher the PLMN priority supporting more slices. The slice information may be:

Request NSSAI, if received, i.e., ordering PLMNs based on the network slices required by the UE;

The subscription (subscribed) NSSAI, UDM itself holds the network slices subscribed to by the UE, i.e. orders PLMNs based on the network slices that the UE can use.

That is, the network may determine a timer for the UE to reselect the PLMN based on the network slice information. For example, a plurality of slices corresponds to a plurality of time durations, with a maximum or minimum time duration selected. There may be one timer per PLMN, or only one timer. If one timer per PLMN, the UE may count according to a timer with the largest or smallest duration. When the timer expires, the UE performs PLMN reselection.

S434a, the UDM sends subscription data, including the PLMN list, to the AMF.

S435a, the AMF sends registration accept/reject, including PLMN list, to the UE.

S434b, the UDM sends subscription data, including the PLMN list, to the AMF.

S435b, the AMF sends a registration accept, including the PLMN list, to the UE.

S436b, the UDM updates the subscription data to the AMF, including the PLMN list.

S437b, the AMF sends a downlink transmission message to the UE, including the PLMN list.

In S434a to S437b, the UDM transmits the PLMN list (including the timer) specified in S433 to the UE. The AMF may be issued during the registration procedure, and the AMF may be further sent to the UE in a registration response message. Or may be sent to the AMF after registration is completed, where the AMF is then sent to the UE in a downlink transport (DL transport) message; after the UE receives the PLMN list, the PLMN reselection is performed according to the PLMN list and the timer. If there is no timer, the UE may perform PLMN reselection immediately or after waiting to enter an idle state.

The method embodiments of the present application are described in detail above with reference to fig. 1 to 8, and the apparatus embodiments of the present application are described in detail below with reference to fig. 10 to 15.

Fig. 10 is a schematic block diagram of a terminal device 510 of an embodiment of the present application.

As shown in fig. 10, the terminal device 510 may include:

An acquisition unit 511 for acquiring a public land mobile network PLMN list; wherein the PLMN list is at least one of the following: information stored in a Universal Subscriber Identity Module (USIM), information acquired through non-access stratum (NAS) signaling and information determined by Unified Data Management (UDM);

A selection unit 512, configured to select a PLMN from the PLMN list based on the network slice of the terminal device.

In some embodiments, the PLMN list is information determined for the UDM; the obtaining unit 511 specifically is configured to:

sending a registration request to a mobile management function AMF; the registration request comprises third indication information, wherein the third indication information is used for indicating whether the terminal equipment has the capability of selecting a network based on network slicing;

and receiving the PLMN list sent by the Unified Data Management (UDM) through the AMF.

In some embodiments, the obtaining unit 511 is specifically configured to:

receiving a registration response message sent by the AMF in a registration process, wherein the registration response message comprises the PLMN list; or (b)

In some embodiments, the obtaining unit 511 is further configured to:

In some embodiments, the selection unit 512 may be configured to:

the slice information includes at least one of:

It should be understood that apparatus embodiments and method embodiments may correspond with each other and that similar descriptions may refer to the method embodiments. Specifically, the terminal device 510 shown in fig. 10 may correspond to a corresponding main body in performing each method provided in the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 510 are respectively for implementing corresponding flows in each method provided in the embodiment of the present application, which are not repeated herein for brevity.

Fig. 11 is a schematic block diagram of an access network device 520 of an embodiment of the present application.

As shown in fig. 11, the access network device 520 may include:

a transmitting unit 521, configured to transmit a system message;

the slice information includes at least one of:

It should be understood that apparatus embodiments and method embodiments may correspond with each other and that similar descriptions may refer to the method embodiments. Specifically, the access network device 520 shown in fig. 11 may correspond to a respective main body in performing the respective methods provided in the embodiments of the present application, and the foregoing and other operations and/or functions of the respective units in the access network device 520 are respectively for implementing the respective flows in the respective methods provided in the embodiments of the present application, which are not repeated herein for brevity.

Fig. 12 is a schematic block diagram of an AMF 530 of an embodiment of the application.

As shown in fig. 12, the AMF 530 may include:

a receiving unit 531, configured to receive a registration request sent by a terminal device; the registration request comprises third indication information, wherein the third indication information is used for indicating whether the terminal equipment has the capability of selecting a network based on network slicing;

A sending unit 532 configured to send a list request to a unified data management UDM, the list request including the third indication information;

the receiving unit 531 is further configured to receive a public land mobile network PLMN list sent by the UDM;

The sending unit 532 is further configured to send the PLMN list to the terminal device.

In some embodiments, the sending unit 532 is specifically configured to:

In some embodiments, the receiving unit 531 is specifically configured to:

and sending the configuration information to the terminal equipment.

In some embodiments, one network slice supported by each PLMN in the PLMN list corresponds to a timer, the timer corresponding to the third PLMN in the PLMN list is a timer with the largest or smallest duration in the timers corresponding to the network slices corresponding to the third PLMN, and the PLMN reselection timer is a timer with the largest or smallest duration in the timers corresponding to the PLMNs in the PLMN list.

It should be understood that apparatus embodiments and method embodiments may correspond with each other and that similar descriptions may refer to the method embodiments. Specifically, the AMF 530 shown in fig. 12 may correspond to a corresponding main body in performing each method provided in the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the AMF 530 are respectively for implementing corresponding flows in each method provided in the embodiment of the present application, which are not repeated herein for brevity.

Fig. 13 is a schematic block diagram of a UDM 540 of an embodiment of the present application.

As shown in fig. 13, the UDM 540 may include:

A receiving unit 541 configured to receive a list request sent by the mobility management function AMF, where the list request includes third indication information, where the third indication information is used to indicate whether the terminal device has a capability of selecting a network based on network slicing;

A determining unit 542 configured to determine a public land mobile network PLMN list based on the third indication information;

a sending unit 543, configured to send the PLMN list to the AMF.

In some embodiments, the sending unit 543 is specifically configured to:

Transmitting the PLMN list to the AMF during registration; or (b)

And sending the PLMN list to the AMF after registration is completed.

In some embodiments, the determining unit 542 is specifically configured to:

In some embodiments, the sending unit 543 is further configured to:

transmitting configuration information of a PLMN reselection timer to the AMF;

It should be understood that apparatus embodiments and method embodiments may correspond with each other and that similar descriptions may refer to the method embodiments. Specifically, the UDM 540 shown in fig. 13 may correspond to a corresponding main body in executing each method provided by the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the UDM 540 are respectively for implementing corresponding flows in each method provided by the embodiment of the present application, which are not repeated herein for brevity.

The communication device according to the embodiment of the present application is described above from the perspective of the functional module in conjunction with the accompanying drawings. It should be understood that the functional module may be implemented in hardware, or may be implemented by instructions in software, or may be implemented by a combination of hardware and software modules. Specifically, each step of the method embodiment in the embodiment of the present application may be implemented by an integrated logic circuit of hardware in a processor and/or an instruction in software form, and the steps of the method disclosed in connection with the embodiment of the present application may be directly implemented as a hardware decoding processor or implemented by a combination of hardware and software modules in the decoding processor. Alternatively, the software modules may be located in a well-established storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, and the like. The storage medium is located in a memory, and the processor reads information in the memory, and in combination with hardware, performs the steps in the above method embodiments.

For example, the acquisition unit 511, the transmission unit 521, the reception unit 531, the transmission unit 532, the reception unit 541, or the transmission unit 543 referred to above may be implemented by a transceiver, and the selection unit 512 or the determination unit 542 referred to above may be implemented by a processor.

Fig. 14 is a schematic structural diagram of a communication apparatus 600 of an embodiment of the present application.

As shown in fig. 14, the communication device 600 may include a processor 610.

Wherein the processor 610 may call and run a computer program from a memory to implement the methods of embodiments of the present application.

As shown in fig. 14, the communication device 600 may also include a memory 620.

The memory 620 may be used to store instruction information, and may also be used to store code, instructions, etc. for execution by the processor 610. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the method in an embodiment of the application. The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

As shown in fig. 14, the communication device 600 may also include a transceiver 630.

The processor 610 may control the transceiver 630 to communicate with other devices, and in particular, may send information or data to other devices or receive information or data sent by other devices. Transceiver 630 may include a transmitter and a receiver. Transceiver 630 may further include antennas, the number of which may be one or more.

It should be appreciated that the various components in the communication device 600 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

It should also be understood that the communication device 600 may be a terminal device, an access network device, an AMF or a UDM according to an embodiment of the present application, and the communication device 600 may implement respective flows implemented by the terminal device, the access network device, the AMF or the UDM in the respective methods according to the embodiment of the present application, that is, the communication device 600 according to the embodiment of the present application may correspond to the terminal device 510, the access network device 520, the AMF 530 or the UDM 540 in the embodiment of the present application, and may correspond to respective main bodies for performing the wireless communication method provided according to the embodiment of the present application, which is not repeated herein for brevity.

In addition, the embodiment of the application also provides a chip.

For example, the chip may be an integrated circuit chip having signal processing capabilities, and the methods, steps and logic blocks disclosed in the embodiments of the present application may be implemented or performed. The chip may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc. Alternatively, the chip may be applied to various communication devices so that the communication device mounted with the chip can perform the methods, steps and logic blocks disclosed in the embodiments of the present application.

Fig. 15 is a schematic structural diagram of a chip 700 according to an embodiment of the present application.

As shown in fig. 15, the chip 700 includes a processor 710.

Wherein the processor 710 may call and run computer programs from memory to implement the methods of embodiments of the present application.

As shown in fig. 15, the chip 700 may further include a memory 720.

Wherein the processor 710 may call and run a computer program from the memory 720 to implement the method in an embodiment of the application. The memory 720 may be used for storing instruction information, and may also be used for storing code, instructions, etc. for execution by the processor 710. Memory 720 may be a separate device from processor 710 or may be integrated into processor 710.

As shown in fig. 15, the chip 700 may further include an input interface 730.

The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

As shown in fig. 15, the chip 700 may further include an output interface 740.

The processor 710 may control the output interface 740 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

It should be understood that the chip 700 may be applied to a terminal device, an access network device, an AMF, or a UDM in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the terminal device, the access network device, the AMF, or the UDM in each method in the embodiment of the present application, which is not described herein for brevity.

It should also be appreciated that the various components in the chip 700 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

The processors referred to above may include, but are not limited to:

A general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field programmable gate array (Field Programmable GATE ARRAY, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like.

The processor may be configured to implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory or erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

The above references to memory include, but are not limited to:

Volatile memory and/or nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate Synchronous dynamic random access memory (Double DATA RATE SDRAM, DDR SDRAM), enhanced Synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCH LINK DRAM, SLDRAM), and Direct memory bus RAM (DR RAM).

It should be noted that the memory described herein is intended to comprise these and any other suitable types of memory.

There is also provided in an embodiment of the present application a computer-readable storage medium storing a computer program. The computer readable storage medium stores one or more programs, the one or more programs comprising instructions, which when executed by a portable electronic device comprising a plurality of application programs, enable the portable electronic device to perform the wireless communication method provided by the present application. Optionally, the computer readable storage medium may be applied to a terminal device, an access network device, an AMF, or a UDM in the embodiment of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the terminal device, the access network device, the AMF, or the UDM in each method in the embodiment of the present application, which is not described herein for brevity.

A computer program product, including a computer program, is also provided in an embodiment of the present application. Optionally, the computer program product may be applied to a terminal device, an access network device, an AMF, or a UDM in the embodiment of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the terminal device, the access network device, the AMF, or the UDM in each method in the embodiment of the present application, which is not described herein for brevity.

The embodiment of the application also provides a computer program. The computer program, when executed by a computer, enables the computer to perform the wireless communication method provided by the present application. Optionally, the computer program may be applied to a terminal device, an access network device, an AMF, or a UDM in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding procedure implemented by the terminal device, the access network device, the AMF, or the UDM in each method in the embodiment of the present application, which is not described herein for brevity.

The embodiment of the present application further provides a communication system, where the communication system may include the terminal device, the access network device, the AMF, or the UDM referred to above, so as to form the communication system 100 shown in fig. 1 or fig. 2, which is not described herein for brevity. It should be noted that the term "system" and the like herein may also be referred to as "network management architecture" or "network system" and the like.

It is also to be understood that the terminology used in the embodiments of the present application and the appended claims is for the purpose of describing particular embodiments only, and is not intended to be limiting of the embodiments of the present application. For example, as used in the embodiments of the application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Those of skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application. If implemented as a software functional unit and sold or used as a stand-alone product, may be stored on a computer readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be embodied in essence or a part contributing to the prior art or a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk.

Those skilled in the art will further appreciate that, for convenience and brevity, specific working procedures of the above-described system, apparatus and unit may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein. In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the division of units or modules or components in the above-described apparatus embodiments is merely a logic function division, and there may be another division manner in actual implementation, for example, multiple units or modules or components may be combined or may be integrated into another system, or some units or modules or components may be omitted or not performed. As another example, the units/modules/components described above as separate/display components may or may not be physically separate, i.e., may be located in one place, or may be distributed over multiple network elements. Some or all of the units/modules/components may be selected according to actual needs to achieve the objectives of the embodiments of the present application. Finally, it is pointed out that the coupling or direct coupling or communication connection between the various elements shown or discussed above can be an indirect coupling or communication connection via interfaces, devices or elements, which can be in electrical, mechanical or other forms.

The foregoing is merely a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the embodiment of the present application, and the changes or substitutions are covered by the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

A method of wireless communication, the method being applicable to a terminal device, the method comprising:

acquiring a Public Land Mobile Network (PLMN) list; wherein the PLMN list is at least one of the following: information stored in a Universal Subscriber Identity Module (USIM), information acquired through non-access stratum (NAS) signaling and information determined by Unified Data Management (UDM);

And selecting PLMN in the PLMN list based on the network slice of the terminal equipment.
The method of claim 1, wherein the PLMN list comprises: a first PLMN and first indication information corresponding to the first PLMN; the first indication information is used for indicating whether the first PLMN supports or allows network-based slice selection.
The method of claim 1, wherein the PLMN list comprises: a second PLMN, at least one access technology corresponding to the second PLMN, and at least one second indication information corresponding to the at least one access technology respectively; the at least one second indication information is used to indicate whether the at least one access technology under the second PLMN supports or allows network based network slicing network selection.
A method according to any of claims 1 to 3, characterized in that when the PLMN list is information stored in the USIM or information acquired through the NAS signaling, the network slice of the terminal device comprises a network slice corresponding to a default service; and when the PLMN list is determined by the UDM, the network slice of the terminal equipment comprises the network slice requested by the terminal equipment.
The method according to any one of claims 1 to 4, wherein the PLMN list is information determined for the UDM; the obtaining a public land mobile network PLMN list comprises:

sending a registration request to a mobile management function AMF; the registration request comprises third indication information, wherein the third indication information is used for indicating whether the terminal equipment has the capability of selecting a network based on network slicing;

and receiving the PLMN list sent by the Unified Data Management (UDM) through the AMF.
The method of claim 5, wherein the receiving the PLMN list sent by the unified data management UDM through the AMF comprises:

receiving a registration response message sent by the AMF in a registration process, wherein the registration response message comprises the PLMN list; or (b)

And after registration is completed, receiving a downlink transmission message sent by the AMF, wherein the downlink transmission message comprises the PLMN list.
The method according to claim 5 or 6, wherein the priority order of PLMNs in the PLMN list is determined from a first network slice comprising at least one of:

The network slice requested by the terminal equipment and the network slice subscribed by the terminal equipment.
The method of claim 7, wherein the priority order of PLMNs in the PLMN list is determined based on the number of first network slices supported by a PLMN.
The method according to claim 4 or 7, wherein the network slice requested by the terminal device is determined by network slice selection assistance information NSSAI requested by the terminal device.
The method according to any one of claims 6 to 9, further comprising:

Receiving configuration information of a PLMN reselection timer sent by the UDM through the AMF;

and triggering the terminal equipment to perform PLMN reselection under the condition that the PLMN reselection timer is overtime or expired.
The method of claim 10, wherein one network slice supported by each PLMN in the PLMN list corresponds to one timer, wherein a timer corresponding to a third PLMN in the PLMN list is a timer having a largest or smallest duration among timers corresponding to network slices corresponding to the third PLMN, and wherein the PLMN reselection timer is a timer having a largest or smallest duration among timers corresponding to PLMNs in the PLMN list.
The method of claim 10, wherein each PLMN in the PLMN list corresponds to a timer, and wherein the PLMN reselection timer is one of a largest duration and a smallest duration of the timers corresponding to PLMNs in the PLMN list.
The method of claim 10, wherein the PLMN reselection timer is a timer corresponding to the PLMN list.
The method according to any of claims 1 to 13, wherein the selecting a PLMN in the PLMN list based on the network slice of the terminal device comprises:

receiving a system message, wherein the system message comprises PLMNs of surrounding cells;

Selecting a PLMN with highest priority among PLMNs of the surrounding cells and meeting the following conditions based on the order of the priority in the PLMN list from high to low:

supporting or allowing network slice-based selection of a network and supporting network slices of the terminal device; and/or

The corresponding access technology supports or allows network slice-based network selection and supports network slicing of the terminal device.
The method of claim 14, wherein the PLMN of the surrounding cell comprises a fourth PLMN corresponding to at least one second access technology; the system message further includes fourth indication information corresponding to the fourth PLMN or at least one fifth indication information corresponding to the at least one second access technology, respectively, where the fourth indication information is used to indicate that the fourth PLMN supports or allows network-based chip selection, and the at least one fifth indication information is used to indicate that the at least one second access technology supports or allows network-based chip selection, respectively.
The method according to claim 15 or 16, wherein the system message further comprises slice information of network slices supported by the fourth PLMN;

the slice information includes at least one of:

Single network slice selection assistance information S-NSSAI, slice groups, standardized slices, and/or service type SST.
A method of wireless communication, the method being adapted for use with an access network device, the method comprising:

Sending a system message;

the system message includes public land mobile network PLMN where surrounding cells are located, and the PLMN where the surrounding cells are located is used for terminal equipment to select PLMN.
The method of claim 17, wherein the PLMN of the surrounding cell comprises a fourth PLMN corresponding to at least one second access technology; the system message further includes fourth indication information corresponding to the fourth PLMN or at least one fifth indication information corresponding to the at least one second access technology, respectively, where the fourth indication information is used to indicate that the fourth PLMN supports or allows network-based chip selection, and the at least one fifth indication information is used to indicate that the at least one second access technology supports or allows network-based chip selection, respectively.
The method according to claim 17 or 18, wherein the system message further comprises slice information of network slices supported by the fourth PLMN;

the slice information includes at least one of:

Single network slice selection assistance information S-NSSAI, slice groups, standardized slices, and/or service type SST.
A method of wireless communication, the method being adapted for use with a mobility management function AMF, the method comprising:

Receiving a registration request sent by terminal equipment; the registration request comprises third indication information, wherein the third indication information is used for indicating whether the terminal equipment has the capability of selecting a network based on network slicing;

Sending a list request to a Unified Data Management (UDM), wherein the list request comprises the third indication information;

receiving a Public Land Mobile Network (PLMN) list sent by the UDM;

And sending the PLMN list to the terminal equipment.
The method of claim 20, wherein the sending the PLMN list to the terminal device comprises:

Transmitting a registration response message to the terminal device in a registration process, wherein the registration response message comprises the PLMN list; or (b)

And after registration is completed, sending a downlink transmission message to the terminal equipment, wherein the downlink transmission message comprises the PLMN list.
The method according to claim 20 or 21, wherein the priority order of PLMNs in the PLMN list is determined from a first network slice comprising at least one of:

The network slice requested by the terminal equipment and the network slice subscribed by the terminal equipment.
The method of claim 22, wherein the priority order of PLMNs in the PLMN list is determined based on the number of first network slices supported by a PLMN.
The method of claim 22, wherein the network slice requested by the terminal device is determined by network slice selection assistance information NSSAI requested by the terminal device.
The method according to any one of claims 20 to 24, further comprising:

Receiving configuration information of a PLMN reselection timer sent by the UDM; the PLMN reselection timer is used for triggering the terminal equipment to perform PLMN reselection;

and sending the configuration information to the terminal equipment.
The method of claim 25, wherein one network slice supported by each PLMN in the PLMN list corresponds to one timer, wherein a timer corresponding to a third PLMN in the PLMN list is a timer having a largest or smallest duration among timers corresponding to network slices corresponding to the third PLMN, and wherein the PLMN reselection timer is a timer having a largest or smallest duration among timers corresponding to PLMNs in the PLMN list.
The method of claim 25, wherein each PLMN in the PLMN list corresponds to a timer, and wherein the PLMN reselection timer is one of a largest duration and a smallest duration of the timers corresponding to PLMNs in the PLMN list.
The method of claim 25, wherein the PLMN reselection timer is a timer corresponding to the PLMN list.
The method according to any one of claims 20 to 28, wherein the PLMN list comprises: a first PLMN and first indication information corresponding to the first PLMN; the first indication information is used for indicating whether the first PLMN supports or allows network-based slice selection.
The method according to any one of claims 20 to 28, wherein the PLMN list comprises: a second PLMN, at least one access technology corresponding to the second PLMN, and at least one second indication information corresponding to the at least one access technology respectively; the at least one second indication information is used to indicate whether the at least one access technology under the second PLMN supports or allows network based network slicing network selection.
A method of wireless communication, the method being adapted for unified data management, UDM, the method comprising:

Receiving a list request sent by a mobile management function AMF, wherein the list request comprises third indication information, and the third indication information is used for indicating whether terminal equipment has the capability of selecting a network based on network slicing;

determining a public land mobile network, PLMN, list based on the third indication information;

And sending the PLMN list to the AMF.
The method of claim 31, wherein the sending the PLMN list to the AMF comprises:

Transmitting the PLMN list to the AMF during registration; or (b)

And sending the PLMN list to the AMF after registration is completed.
The method according to claim 32 or 32, wherein said determining a public land mobile network, PLMN, list based on the third indication information comprises:

And when the third indication information is used for indicating that the terminal equipment has the network selection capability based on the network slice, determining the priority order of PLMNs in the PLMN list according to a first network slice, wherein the first network slice comprises at least one of the following components:

The network slice requested by the terminal equipment and the network slice subscribed by the terminal equipment.
The method of claim 33, wherein the priority order of PLMNs in the PLMN list is determined based on the number of first network slices supported by a PLMN.
The method of claim 33, wherein the network slice requested by the terminal device is determined by network slice selection assistance information NSSAI requested by the terminal device.
The method according to any one of claims 31 to 35, further comprising:

transmitting configuration information of a PLMN reselection timer to the AMF;

The PLMN reselection timer is used for triggering the terminal equipment to perform PLMN reselection.
The method of claim 36, wherein one network slice supported by each PLMN in the PLMN list corresponds to one timer, wherein a timer corresponding to a third PLMN in the PLMN list is a timer having a largest or smallest duration among timers corresponding to network slices corresponding to the third PLMN, and wherein the PLMN reselection timer is a timer having a largest or smallest duration among timers corresponding to PLMNs in the PLMN list.
The method of claim 36, wherein each PLMN in the PLMN list corresponds to a timer, and wherein the PLMN reselection timer is one of a largest duration and a smallest duration of the timers corresponding to PLMNs in the PLMN list.
The method of claim 36, wherein the PLMN reselection timer is a timer corresponding to the PLMN list.
The method according to any one of claims 31 to 39, wherein the PLMN list comprises: a first PLMN and first indication information corresponding to the first PLMN; the first indication information is used for indicating whether the first PLMN supports or allows network-based slice selection.
The method according to any one of claims 31 to 39, wherein the PLMN list comprises: a second PLMN, at least one access technology corresponding to the second PLMN, and at least one second indication information corresponding to the at least one access technology respectively; the at least one second indication information is used to indicate whether the at least one access technology under the second PLMN supports or allows network based network slicing network selection.
A terminal device, comprising:

An acquisition unit configured to acquire a public land mobile network PLMN list; wherein the PLMN list is at least one of the following: information stored in a Universal Subscriber Identity Module (USIM), information acquired through non-access stratum (NAS) signaling and information determined by Unified Data Management (UDM);

And the selecting unit is used for selecting PLMN in the PLMN list based on the network slice of the terminal equipment.
An access network device, comprising:

a transmitting unit, configured to transmit a system message;

the system message includes public land mobile network PLMN where surrounding cells are located, and the PLMN where the surrounding cells are located is used for terminal equipment to select PLMN.
A mobility management function AMF, comprising:

A receiving unit, configured to receive a registration request sent by a terminal device; the registration request comprises third indication information, wherein the third indication information is used for indicating whether the terminal equipment has the capability of selecting a network based on network slicing;

a sending unit, configured to send a list request to a unified data management UDM, where the list request includes the third indication information;

The receiving unit is further configured to receive a public land mobile network PLMN list sent by the UDM;

The sending unit is further configured to send the PLMN list to the terminal device.
A unified data management, UDM, comprising:

A receiving unit, configured to receive a list request sent by a mobility management function AMF, where the list request includes third indication information, where the third indication information is used to indicate whether a terminal device has a capability of selecting a network based on network slicing;

a determining unit configured to determine a public land mobile network PLMN list based on the third indication information;

And the sending unit is used for sending the PLMN list to the AMF.
A terminal device, comprising:

A processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to perform the method of any of claims 1 to 16.
An access network device, comprising:

A processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to perform the method of any of claims 17 to 19.
A core network device, comprising:

A processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to perform the method of any of claims 20 to 30 or the method of any of claims 31 to 41.
A chip, comprising:

A processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 16, the method of any one of claims 17 to 19, the method of any one of claims 20 to 30 or the method of any one of claims 31 to 41.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 16, the method of any one of claims 17 to 19, the method of any one of claims 20 to 30 or the method of any one of claims 31 to 41.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 16, the method of any one of claims 17 to 19, the method of any one of claims 20 to 30 or the method of any one of claims 31 to 41.
A computer program, characterized in that the computer program causes a computer to perform the method of any one of claims 1 to 16, the method of any one of claims 17 to 19, the method of any one of claims 20 to 30 or the method of any one of claims 31 to 41.