WO2022126641A1

WO2022126641A1 - Wireless communication method, terminal device, first access network device, and network element

Info

Publication number: WO2022126641A1
Application number: PCT/CN2020/137738
Authority: WO
Inventors: 杨皓睿; 付喆
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2022-06-23
Also published as: CN116250290A

Abstract

Embodiments of the present application provide a wireless communication method, a terminal device, a first access network device, and a network element. The method comprises: a terminal device selects, according to the slice requirement of the terminal device, a cell on which terminal device camps. In the present application, a terminal device selects, according to the slice requirement of the terminal device, a cell on which terminal device camps. Whether the neighboring cell of a cell to camp supports a slice desired to be used by a user equipment is considered while a cell to camp is selected. In other words, it can be ensured that a suitable second access network device can be selected by a first access network device while a cell to camped is selected. On this basis, the success rate of session establishment and the success rate of service transmission can be increased.

Description

Wireless communication method, terminal device, first access network device, and network element

technical field

The embodiments of the present application relate to the field of communication, and more particularly, to a wireless communication method, a terminal device, a first access network device, and a network element.

Background technique

For a dual-connection (DC) scenario, two access network devices can be connected to a user equipment (User Equipment, UE) at the same time and transmit data. That is, the first access network device and the second access network device. The radio resource control (Radio Resource Control, RRC) signaling of the UE can only be sent to the first access network device, but data can be simultaneously transmitted through the first access network device and the second access network device.

The first access network device selects the second access network device only when it needs to transmit data, that is, establishes a protocol data unit (Protocol Data Unit, PDU) session (session), and helps to establish the second access network device and the second access network device. A tunnel for transferring data between User Plane Function (UPF).

However, if the second access network device cannot support the slice expected to be used by the user equipment, service transmission will fail.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a wireless communication method, a terminal device, a first access network device, and a network element, which can ensure that the second access network device supports slices expected to be used by the user equipment, thereby improving the success rate of service transmission.

In a first aspect, a wireless communication method is provided, including:

The terminal equipment selects the camping cell of the terminal equipment according to the slicing requirements of the terminal equipment.

In a second aspect, a wireless communication method is provided, including:

The terminal device sends a first message to the first access network device, where the first message includes information of at least one slice expected to be used by the terminal device, and the at least one slice is used by the first access network device to determine the the second access network device of the terminal device.

In a third aspect, a wireless communication method is provided, including:

The first access network device receives a first message sent by the terminal device, where the first message includes information of at least one slice that the terminal device expects to use;

The first access network device determines the second access network device of the terminal device based on the information of the at least one slice.

In a fourth aspect, a wireless communication method is provided, including:

The mobility management network element receives a second message sent by the first access network device, where the second message includes information about the first slice supported by the second access network device and the first slice supported by the first access network device. Information about two slices.

In a fifth aspect, a terminal device is provided for executing any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof. Specifically, the terminal device includes a functional module for executing any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.

In a sixth aspect, a first access network device is provided, which is configured to execute the method in the third aspect or each of its implementations. Specifically, the first access network device includes a functional module for executing the method in the third aspect or each implementation manner thereof.

In a seventh aspect, a mobility management network element is provided, which is used to execute the method in the fourth aspect or each of its implementations. Specifically, the mobility management network element includes functional modules for executing the methods in the fourth aspect or the respective implementation manners thereof.

In an eighth aspect, a terminal device is provided, including 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, so as to execute the methods in the above-mentioned first to second aspects or their respective implementations.

In a ninth aspect, a first access network device is provided, including 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, so as to execute the method in the third aspect or each of its implementations.

In a tenth aspect, a mobility management network element is provided, including 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, so as to execute the method in the fourth aspect or each of its implementations.

In an eleventh aspect, a chip is provided for implementing any one of the above-mentioned first to fourth aspects or the method in each of its implementations. Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device installed with the chip executes any one of the above-mentioned first to fourth aspects or each of its implementations method in .

A twelfth aspect provides a computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method in any one of the above-mentioned first to fourth aspects or each of its implementations.

In a thirteenth aspect, a computer program product is provided, comprising computer program instructions, the computer program instructions causing a computer to perform the method in any one of the above-mentioned first to fourth aspects or implementations thereof.

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

Based on the above technical solutions, the terminal equipment selects the camping cell of the terminal equipment according to the slice requirements of the terminal equipment, and can consider whether the neighboring cells of the camping cell support the slice expected to be used by the user equipment while selecting the camping cell, Equivalently, while selecting the camping cell, it can be ensured that a suitable second access network device can be selected by the first access network device. Based on this, the success rate of session establishment and the success rate of service transmission can be improved.

Description of drawings

FIG. 1 is an example of a communication system provided by an embodiment of the present application.

FIG. 2 is another example of a communication system provided by an embodiment of the present application.

3 to 7 are schematic flowcharts of a wireless communication method provided by an embodiment of the present application.

FIG. 8 is a schematic block diagram of a terminal device provided by an embodiment of the present application.

FIG. 9 is another schematic block diagram of a terminal device provided by an embodiment of the present application.

FIG. 10 is a schematic block diagram of a first access network device provided by an embodiment of the present application.

FIG. 11 is a schematic block diagram of a mobility management network element provided by an embodiment of the present application.

FIG. 12 is a schematic block diagram of a communication device provided by an embodiment of the present application.

FIG. 13 is a schematic block diagram of a chip provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. With regard to the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The embodiments of the present application may be applied to various communication systems, for example: a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (Wideband Code) system Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio Interface (New Radio, NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum on unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), next-generation communication systems or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc., the embodiments of the present application can also be applied to these communications system.

This embodiment of the present application does not limit the applied spectrum. For example, the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.

FIG. 1 exemplarily shows a schematic diagram of a communication system 100 applied in the present application. As shown in FIG. 1 , the communication system 100 mainly includes a terminal device (User Equipment, UE) 101, an access network (Access Network, AN) device 102, an access and mobility management function (Access and Mobility Management Function, AMF) Entity 103, Session Management Function (SMF) entity 104, User Plane Function (UPF) entity 105, Policy Control Function (PCF) entity 106, Unified Data Management (Unified Data Management, UDM) entity 107, Data Network (DN) 108, Application Function (AF) entity 109, Authentication Server Function (AUSF) entity 110, Network Slice Selection Function (Network Slice Selection Function, NSSF) entity 111.

Specifically, in the communication system 100, the UE 101 performs an access stratum connection with the AN device 102 through the Uu interface to exchange access stratum messages and wireless data transmission, and the UE 101 communicates with the AMF entity 103 through the N1 interface for non-access stratum ( Non-Access Stratum (NAS) connection to exchange NAS messages; AN device 102 is connected to AMF entity 103 through N2 interface, and AN device 102 is connected to UPF entity 105 through N3 interface; multiple UPF entities 105 are connected through N9 interface , UPF entity 105 is connected with DN 108 through N6 interface, at the same time, UPF entity 105 is connected with SMF entity 104 through N4 interface; SMF entity 104 is connected with PCF entity 106 through N7 interface, SMF entity 104 is connected with UDM entity 107 through N10 interface, The SMF entity 104 controls the UPF entity 105 through the N4 interface, and at the same time, the SMF entity 104 is connected to the AMF entity 103 through the N11 interface; multiple AMF entities 103 are connected through the N14 interface, the AMF entity 103 is connected to the UDM entity 107 through the N8 interface, and the AMF entity 103 is connected to the UDM entity 107 through the N8 interface. The entity 103 is connected with the AUSF entity 110 through the N12 interface, the AMF entity 103 is connected with the NSSF entity 111 through the N22 interface, and at the same time, the AMF entity 103 is connected with the PCF entity 106 through the N15 interface; the PCF entity 106 is connected with the AF entity 109 through the N5 interface; AUSF The entity 110 is connected to the UDM entity 107 through the N13 interface.

In the communication system 100, the UDM entity 107 is a subscription database in the core network, and stores subscription data of users in the 5G network. The AMF entity 103 is the mobility management function in the core network, and the SMF entity 104 is the session management function in the core network. In addition to the mobility management of the UE 101, the AMF entity 103 is also responsible for sending messages related to session management to the UE 101 and SMF entity 104 forwarding. The PCF entity 106 is a policy management function in the core network, and is responsible for formulating policies related to mobility management, session management, and charging of the UE 101. The UPF entity 105 is a user plane function in the core network, and performs data transmission with the external data network through the N6 interface, and performs data transmission with the AN device 102 through the N3 interface. After the UE 101 accesses the 5G network through the Uu port, a protocol data unit (Protocol Data Unit, PDU) session data connection between the UE 101 and the UPF entity 105 is established under the control of the SMF entity 104, thereby performing data transmission. The AMF entity 103 and the SMF entity 104 obtain user subscription data from the UDM entity 107 through the N8 and N10 interfaces, respectively, and obtain policy data from the PCF entity 106 through the N15 and N7 interfaces.

In addition, there is also a Network Exposure Function (NEF) entity in the communication system 100, which is used to interface with a third-party application server and perform information transfer between the core network node and the third-party application.

UE 101 may also be referred to as user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment, and the like. The terminal device can be a station (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN) network, etc. As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.

The AN device 102 may be a device for communicating with mobile devices, and the AN device 102 may be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, or WCDMA The base station (NodeB, NB) in the LTE network can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a base station (gNB) in in-vehicle devices, wearable devices and NR networks ) or network equipment in the future evolved PLMN network, etc.

In this embodiment of the present application, the AN device 102 provides services for a cell, and the UE 101 communicates with the AN device 102 through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be an AN device 102 (such as a base station) corresponding cell, the cell may belong to a macro base station, or it may belong to a base station corresponding to a small cell (Small cell), where the small cell may include: urban cell (Metro cell), micro cell (Micro cell), Pico cell (Pico cell), Femto cell (Femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

It should be noted that the above communication system 100 is described by taking a 5G communication system as an example. Of course, this application can also be applied to other 3GPP communication systems, such as a 4G communication system, or a future 3GPP communication system. This application does not limited.

It should be understood that, in the embodiments of the present application, a device having a communication function in the network/system may be referred to as a communication device.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

Network slices may be deployed in the communication system 100 in this embodiment of the present application. A network slice can be identified using a single network slice selection assistance information (Single-Network Slice Selection Assistance Information, S-NSSAI). The set of S-NSSAI becomes NSSAI. When the UE 101 needs to use the network slice, it needs to first request the AMF entity 103 to use the slice. After the AMF entity 103 agrees, the UE 101 then requests to establish a PDU session in the slice to transmit data. According to the service, the UE 101 puts the S-NSSAI to be requested in the Requested NSSAI (Requested NSSAI), and the Requested NSSAI is included in the Registration Request (Registration request) and sent to the AMF entity 103. The AMF entity 103 determines the allowed NSSAI (Allowed NSSAI) according to the subscription of the UE 101 and the scope of the network slice deployment, and the allowed NSSAI is sent to the UE 101 in the Registration Accept message, and is also sent to the AN device 102 in the N2 message . After receiving the allowed NSSAI, the UE 101 needs to establish a PDU session in the slice corresponding to the service selected from the slices in the allowed NSSAI. Data can be sent and received only after the PDU session is established.

During network deployment, the coverage of each slice may be different. When AMF entity 103 decides to allow NSSAI, it needs to ensure that all slices in NSSAI are allowed to cover the registration area (Registration area) allocated to UE 101 by AMF entity 103. For example Tracking area list (TA list). The AMF entity 103 obtains the S-NSSAI and the corresponding TA supported by the AN device 102 from the AN device 102 through NG setup request (NG setup request) or radio access network configuration update (RAN configuration update) signaling.

The communication system 100 in the embodiment of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, also can be applied to a dual connectivity (Dual Connectivity, DC) scenario, and can also be applied to a standalone (Standalone, SA) network deployment scenario.

FIG. 2 is an example of a DC scenario provided by an embodiment of the present application.

As shown in FIG. 2, for a dual-connection (Dual-connection, DC) scenario, two access network devices can be connected to a user equipment (User Equipment, UE) at the same time and transmit data. That is, the first access network device and the second access network device. The first access network device may also be called a master node (Master Node, MN), and the second access network device may also be called a secondary node (Secondary Node, SN). The radio resource control (Radio Resource Control, RRC) signaling of the UE can only be sent to the first access network device, but data can be simultaneously transmitted through the first access network device and the second access network device. The first access network device selects the second access network device only when it needs to transmit data, that is, establishes a protocol data unit (Protocol Data Unit, PDU) session (session), and helps to establish the second access network device and the second access network device. A tunnel for transferring data between User Plane Function (UPF). However, if the second access network device cannot support the slice expected to be used by the user equipment, service transmission will fail.

As shown in FIG. 2 , it is assumed that the first access network device of cell 1 supports slice 1 and slice 2, and the first access network device of cell 2 supports slice 2 and slice 3. In this scenario, if the UE needs to use slices 1, 2, and 3, how to make the access network device of cell 2 become the second access network device of the UE, so as to ensure that the UE can obtain the services of slice 3 at the current location, yes Technical problems that need to be solved urgently in this field.

FIG. 3 shows a schematic flowchart of a wireless communication method 210 according to an embodiment of the present application, and the method 210 may be executed by a terminal device. For example, the UE 101 shown in FIG. 1 or the terminal device shown in FIG. 2 .

As shown in FIG. 3, the method 210 may include:

S211, the terminal device selects a camping cell of the terminal device according to the slicing requirement of the terminal device.

For example, the terminal device selects the camping cell according to the slice requirement and the slice supported by each of the multiple cells.

In the embodiment of the present application, the terminal device selects the camping cell of the terminal device according to the slice requirements of the terminal device, and can consider whether the neighboring cells of the camping cell support the slice expected to be used by the user equipment while selecting the camping cell. , which is equivalent to ensuring that a suitable second access network device can be selected by the first access network device while selecting the camping cell. Based on this, the success rate of session establishment and service transmission can be improved.

In some embodiments of the present application, the S211 may include:

acquiring, by the terminal device, slices supported by the first cell and slices supported by neighboring cells of the first cell;

The terminal device determines the first cell as the camping cell of the terminal device in the case that the slice supported by the first cell and the slice supported by the neighboring cell meet the slice requirement of the terminal device. The slicing requirement of the terminal device is transmitted by the NAS layer of the UE to the access layer, and can be triggered by the access layer inquiring to the NAS layer.

In other words, according to the slice required by the terminal device, if the slice supported by the current cell and the slice supported by the neighbor cell can meet the slice requirement, it means that the neighbor cell may become the second access network device in the future. Therefore, the terminal device can select the current cell as the cell where it is camped. Because the neighboring cell supports the desired slice of the terminal device, when the terminal device initiates the establishment of a session using the slice, it is ensured that the base station of the current cell selects the base station of the neighboring cell to become the second access network device, and passes the second access network device through the second The access network device establishes a session.

In some embodiments of the present application, the information of the slices supported by the first cell is included in the first system information.

Optionally, the terminal device is in an idle state, and the first system information is system information received when the terminal device needs to perform cell selection or cell reselection.

Optionally, the first system information further includes an identifier of the neighbor cell and information about slices supported by the neighbor cell.

For example, when the terminal device is in an idle state and needs to perform cell selection/reselection, it first obtains the slice supported by the access network device from the first system information of the access network device that can be received. information, such as S-NSSAI. In addition, neighbor cell information in the first system information may also be acquired, where the neighbor cell information includes an identifier (ID) of a neighbor cell, and may also include information about slices supported by the neighbor cell. Based on this, the terminal device may determine the camping cell based on the slice requirement, the information of the slices supported by the access network device, and the information of the slices supported by the neighboring cell.

Optionally, the method 210 may further include:

The terminal device searches for second system information of the neighboring cell, where the second system information includes information of slices supported by the neighboring cell.

For example, when the terminal device is in an idle state and needs to perform cell selection/reselection, it first obtains the slice supported by the access network device from the first system information of the access network device that can be received. information, such as S-NSSAI. In addition, in the case that the first system information includes the identifier of the neighbor cell but does not include the information of the slice supported by the neighbor cell, the terminal device obtains the neighbor cell information in the first system information, and the The neighbor cell information includes the identifier (ID) of the neighbor cell, and then the second system information of the neighbor cell is searched, including the information of the slice supported by the neighbor cell. Based on this, the terminal device may determine the camping cell based on the slice requirement, the information of the slice supported by the access network device, and the information of the slice supported by the neighboring cell.

In some embodiments of the present application, the method 210 may further include:

The terminal device sends a session establishment request, where the session establishment request includes information on slices that the terminal device expects to use and that the neighboring cell supports.

FIG. 4 shows a schematic flowchart of a wireless communication method 220 according to an embodiment of the present application, and the method 220 may be executed by a terminal device. For example, the UE 101 shown in FIG. 1 or the terminal device shown in FIG. 2 .

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

S221: The terminal device sends a first message to a first access network device, where the first message includes information about at least one slice expected to be used by the terminal device, and the at least one slice is used for the first access network device A second access network device of the terminal device is determined. Optionally, the information of the at least one slice may include an identifier of each slice in the at least one slice; for example, the information of the at least one slice may include the S-NSSAI of each slice.

In this embodiment of the present application, the terminal device sends the first message to the first access network, so that the first access network device can select a suitable second access network device in advance, and then the first access network device After the access network device notifies the mobility management network element of the slice supported by the second access network device, it can ensure that the mobility management network element does not reject the establishment of the session, and based on this, the success rate of session establishment and the service can be improved. Transmission success rate.

In some embodiments of the present application, the first message is radio resource control RRC signaling.

In some embodiments of the present application, the method 220 may further include:

The terminal device sends an uplink non-access stratum NAS message to the mobility management network element, where the uplink NAS message includes a protocol data unit PDU session establishment request and information of a slice used for establishing a session. Optionally, the mobility management network element may be a mobility management function (Access and Mobility Management Function, AMF), of course, may also be an entity with a mobility management function in other 3GPP communication systems, which is not limited in this application. Optionally, the information of the slice used for establishing the session may be an identifier of the slice used for establishing the session; for example, the information of the slice used for establishing the session may be the S-NSSAI of the slice used for establishing the session.

The terminal device receives a first protocol data unit PDU session establishment accept message sent by the first access network device, where the first PDU session establishment accept message is used to indicate that the PDU session establishment is successful.

The wireless communication method provided by the embodiment of the present application is described below from the perspective of the first access network device.

FIG. 5 shows a schematic flowchart of a wireless communication method 230 according to an embodiment of the present application, and the method 230 may be executed by an access network device. For example, the AN device 102 shown in FIG. 1 or the first access network device shown in FIG. 2 .

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

S231: The first access network device receives a first message sent by the terminal device, where the first message includes information of at least one slice expected to be used by the terminal device; optionally, the information of the at least one slice may include all the identification of each of the at least one slice; for example, the information of the at least one slice may include the S-NSSAI of the each slice.

S232, the first access network device determines a second access network device of the terminal device based on the information of the at least one slice.

In some embodiments of the present application, the S232 may include:

The first access network device determines an access network device that is adjacent to the first access network device and that can support the first slice as a second access network device. Optionally, the first slice is a subset or a complete set of slices in the at least one slice that are not supported by the first access network device.

In some embodiments of the present application, the method 230 may further include:

The first access network device sends a second message to the mobility management network element, where the second message includes information of the first slice supported by the second access network device and the first access network Information about the second slice supported by the network device. Optionally, the mobility management network element may be a mobility management function (Access and Mobility Management Function, AMF), of course, may also be an entity with a mobility management function in other 3GPP communication systems, which is not limited in this application. Optionally, the information of the first slice may include an identifier of the first slice; for example, the S-NSSAI of the first slice. Optionally, the information of the second slice may include an identifier of the second slice; for example, the S-NSSAI of the second slice.

The first access network device receives a third message sent by the mobility management network element, where the third message is used to establish a PDU session, and the third message includes the identifier of the tunnel of the user plane network element. Optionally, the user plane network element may be a user plane function (User Plane Function, UPF), of course, may also be an entity having a user plane function in other 3GPP communication systems, which is not limited in this application. Optionally, the third message further includes information of the first slice. Optionally, the information of the first slice may include an identifier of the first slice; for example, the S-NSSAI of the first slice.

assigning, by the first access network device, an identifier of the tunnel of the second access network device; the first access network device sends a notification message to the second access network device, where the notification message includes the The identifier of the tunnel of the second access network device.

The first access network device sends the identifier of the tunnel of the second access network device to the session management network element. Optionally, the session management network element may be a session management function (Session Management Function, SMF), of course, may also be an entity with a session management function in other 3GPP communication systems, which is not limited in this application.

The first access network device sends a first protocol data unit PDU session establishment accept message to the terminal device, where the first PDU session establishment accept message is used to indicate that the PDU session establishment is successful.

The wireless communication method provided by the embodiment of the present application will be described below from the perspective of a mobility management network element with reference to FIG. 5 .

FIG. 6 shows a schematic flowchart of a wireless communication method 240 according to an embodiment of the present application, and the method 240 may be executed by a mobility management network element. For example, the AMF entity 103 shown in FIG. 1 or the AMF shown in FIG. 2 . It should be noted that, the mobility management network element in the embodiment of the present application may be, for example, an Access and Mobility Management Function (AMF) in a 5G communication system, and of course, may also be in other 3GPP communication systems The entity with the mobility management function is not limited in this application.

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

S241. The mobility management network element receives a second message sent by the first access network device, where the second message includes information about the first slice supported by the second access network device and the first slice supported by the first access network device. Information about two slices. Optionally, the information of the first slice may include an identifier of the first slice; for example, the S-NSSAI of the first slice. Optionally, the information of the second slice may include an identifier of the second slice; for example, the S-NSSAI of the second slice.

In some embodiments of the present application, the method 240 may further include:

The mobility management network element receives an uplink non-access stratum NAS message sent by the terminal device, where the uplink NAS message includes a protocol data unit PDU session establishment request and information on the slice used for establishing the session; in the first access network device or if the second access network device supports the slice used for establishing the session, agree to establish a PDU session; if neither the first access network device nor the second access network device supports the session established at the end In the case of the slice used, the establishment of the PDU session is rejected. Optionally, the information of the slice used for establishing the session may be an identifier of the slice used for establishing the session; for example, the information of the slice used for establishing the session may be the S-NSSAI of the slice used for establishing the session.

The mobility management network element sends a third message to the first access network device, where the third message is used to establish a PDU session, and the third message includes an identifier of the tunnel of the user plane network element.

It should be understood that the steps in the method 220 to the corresponding steps in the method 240 may refer to each other with reference to each other, and for the sake of brevity, details are not described herein again.

FIG. 7 shows a schematic flowchart of a wireless communication method 300 according to an embodiment of the present application, and the method 300 may be executed interactively by a terminal device, a first access network device, an AMF, and an SMF. The terminal device may be the UE 101 shown in FIG. 1 or the terminal device shown in FIG. 2 , and the first access network device may be the AN device 102 shown in FIG. 1 or the first access network device shown in FIG. 2 . network device, the AMF may be the AMF entity 103 shown in FIG. 1 or the AMF shown in FIG. 2 , and the SMF may be the SMF entity 104 shown in FIG. 1 . Of course, the AMF shown in FIG. 7 can also be replaced with an entity with mobility management function in other 3GPP communication systems, and the SMF shown in FIG. 7 can also be replaced with an entity with session management function in other 3GPP communication systems. This is not limited.

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

S301, the terminal device sends an RRC message to the first access network device, including S-NSSAI 1, 2, and 3.

For example, in the process of establishing the RRC connection, the terminal device notifies the first access network device of information about the intended slices of the terminal device, such as S-NSSAI 1, S-NSSAI 2, and S-NSSAI 3 .

S302, the first access network device selects an access network device around the first access network device that can support S-NSSAI 1, S-NSSAI 2 or S-NSSAI 3 as the second access network device.

For example, the first access network device pre-selects accesses adjacent to the first access network device that can support the intended slice according to the information of the intended slice of the terminal device and the slices supported by neighboring cells. The network device acts as the second access network device to ensure that all slices supported by the first access network device and the second access network device include the intended slice of the terminal device.

S303, the first access network device sends to the AMF the information of the slices supported by the first access network device and the information of the slices supported by the second access network.

For example, the first access network device notifies the AMF of information about slices supported by the first access network device and the second access network device respectively.

S304, the terminal device sends an uplink non-access stratum non-access stratum (Non-Access Stratum, NAS) message (UL NAS transport) to the AMF, where the uplink non-access stratum NAS message includes a PDU session identifier and a PDU session establishment request and S-NSSAI 3.

For example, when a service needs to be transmitted on the terminal device side, the terminal device initiates a session establishment request, and the session establishment request is included in the uplink non-access stratum NAS message. Optionally, the uplink non-access stratum NAS message may further include the identifier of the PDU session and the information of the slice used to establish the session. Optionally, the information of the slice used for establishing the session may be an identifier of the slice used for establishing the session, such as S-NSSAI. As an example, the information of the slice used for establishing the session in FIG. 7 is S-NSSAI3.

S305, the AMF determines whether S-NSSAI 3 is supported by the first access network device or the second access network device, and as long as one access network device supports it, the session establishment is approved.

For example, if the AMF finds that the first access network device does not support S-NSSAI 3, but the second access network device supports S-NSSAI 3, the AMF agrees to establish the session; if the first access network device and the second access network device support S-NSSAI 3 S-NSSAI 3 is not supported, the AMF rejects the session establishment.

S306, a PDU session establishment is performed between the AMF and the SMF.

For example, when the AMF agrees to the session establishment, after the AMF sends the PDU session establishment request to the SMF, the SMF selects the UPF and assigns the tunnel ID (Tunnel ID) of the UPF, and the AMF receives the PDU session establishment response sent by the SMF, and the PDU session establishment response The identity of the tunnel that includes the UPF.

S307: The AMF sends a third message to the first access network device, where the third message is used to establish a PDU session, and the third message includes the identifier of the tunnel of the UPF. Optionally, the third message further includes information of slices used for establishing the session. Optionally, the information of the slice used for establishing the session may be an identifier of the slice used for establishing the session, such as S-NSSAI. For example, the third message includes the identification of the UPF's tunnel and S-NSSAI 3.

S308, the first access network device selects the second access network device as a node of the N3 tunnel.

For example, the first access network device knows that it does not support S-NSSAI 3 but the second access network device does, so the first access network device allocates the tunnel identifier (Tunnel ID) of the second access network device. The first access network device sends a notification message to the second access network device, where the notification message includes an identifier of the tunnel of the second access network device.

S308, the first access network device sends the identifier of the tunnel of the second access network device to the SMF.

S309, the terminal device receives a PDU session establishment accept (PDU session establishment accept) message sent by the first access network device.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications all belong to the protection scope of the present application. For example, the specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner unless they are inconsistent. In order to avoid unnecessary repetition, this application does not describe any possible combination. State otherwise. For another example, the various embodiments of the present application can also be combined arbitrarily, as long as they do not violate the idea of the present application, they should also be regarded as the content disclosed in the present application.

It should also be understood that, in the various method embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the present application. The implementation of the embodiments constitutes no limitation. In addition, in the embodiments of the present application, the terms "downlink" and "uplink" are used to indicate the transmission direction of signals or data, wherein "downlink" is used to indicate that the transmission direction of signals or data is from the site to the user equipment of the cell In the first direction, "uplink" is used to indicate that the transmission direction of the signal or data is the second direction sent from the user equipment of the cell to the site. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in this embodiment of the present application, the term "and/or" is only an association relationship for describing associated objects, indicating that there may be three kinds of relationships. Specifically, A and/or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

The method embodiments of the present application are described in detail above with reference to FIGS. 1 to 7 , and the device embodiments of the present application are described in detail below.

FIG. 8 is a schematic block diagram of a terminal device 410 according to an embodiment of the present application.

As shown in FIG. 8, the terminal device 410 may include:

The selecting unit 411 is configured to select the camping cell of the terminal device according to the slicing requirement of the terminal device.

In some embodiments of the present application, the selection unit 411 is specifically configured to:

acquiring slices supported by the first cell and slices supported by neighboring cells of the first cell;

In the case that the slice supported by the first cell and the slice supported by the neighboring cell meet the slice requirement of the terminal device, the first cell is determined as the camping cell of the terminal device.

In some embodiments of the present application, the terminal device is in an idle state, and the first system information is system information received when the terminal device needs to perform cell selection or cell reselection.

In some embodiments of the present application, the first system information further includes an identifier of the neighbor cell and information on slices supported by the neighbor cell.

In some embodiments of the present application, the selection unit 411 is further configured to:

Second system information of the neighbor cell is searched, where the second system information includes information of slices supported by the neighbor cell.

FIG. 9 is a schematic block diagram of a terminal device 420 according to an embodiment of the present application.

As shown in FIG. 9, the terminal device 420 may include:

A sending unit 421, configured to send a first message to a first access network device, where the first message includes information of at least one slice expected to be used by the terminal device, and the at least one slice is used for the first access The network device determines the second access network device of the terminal device.

In some embodiments of the present application, the sending unit 421 is further configured to:

An uplink non-access stratum NAS message is sent to the mobility management network element, where the uplink NAS message includes a protocol data unit PDU session establishment request and information of a slice used for establishing a session.

A first protocol data unit PDU session establishment accept message sent by the first access network device is received, where the first PDU session establishment accept message is used to indicate that the PDU session establishment is successful.

FIG. 10 is a schematic block diagram of a first access network device 430 according to an embodiment of the present application.

As shown in FIG. 10 , the first access network device 430 may include:

a receiving unit 431, configured to receive a first message sent by a terminal device, where the first message includes information of at least one slice expected to be used by the terminal device;

A determining unit 432, configured to determine a second access network device of the terminal device based on the information of the at least one slice.

In some embodiments of the present application, the determining unit 432 is specifically configured to:

An access network device that is adjacent to the first access network device and that can support the first slice is determined as a second access network device.

In some embodiments of the present application, the first slice is a subset or a complete set of slices in the at least one slice that are not supported by the first access network device.

In some embodiments of the present application, the receiving unit 431 is further configured to:

Sending a second message to the mobility management network element, where the second message includes information about the first slice supported by the second access network device and information about the second slice supported by the first access network device information.

A third message sent by the mobility management network element is received, where the third message is used to establish a PDU session, and the third message includes the identifier of the tunnel of the user plane network element.

In some embodiments of the present application, the third message further includes information of the first slice.

assigning the identifier of the tunnel of the second access network device;

Send a notification message to the second access network device, where the notification message includes an identifier of the tunnel of the second access network device.

The identifier of the tunnel of the second access network device is sent to the session management network element.

Send a first protocol data unit PDU session establishment accept message to the terminal device, where the first PDU session establishment accept message is used to indicate that the PDU session establishment is successful.

FIG. 11 is a schematic block diagram of a mobility management network element 440 according to an embodiment of the present application.

As shown in FIG. 11 , the mobility management network element 440 may include:

The receiving unit 441 is configured to receive a second message sent by the first access network device, where the second message includes information of the first slice supported by the second access network device and second information supported by the first access network device slice information.

In some embodiments of the present application, the receiving unit 441 is further configured to:

receiving an uplink non-access stratum NAS message sent by a terminal device, where the uplink NAS message includes a protocol data unit PDU session establishment request and information about a slice used for establishing a session;

In the case that the first access network device or the second access network device supports the slice used for establishing the session, agree to establish the PDU session;

In the case that neither the first access network device nor the second access network device supports the slice used for the session to be established finally, the establishment of the PDU session is refused.

A third message is sent to the first access network device, where the third message is used to establish a PDU session, and the third message includes the identifier of the tunnel of the user plane network element.

It should be understood that the apparatus embodiments and the method embodiments may correspond to each other, and similar descriptions may refer to the method embodiments. Specifically, the terminal device 410 shown in FIG. 8 , the terminal device 420 shown in FIG. 9 , the first access network device 430 shown in FIG. 10 , and the mobility management network element 440 shown in FIG. The corresponding subject in the wireless communication method provided by the embodiment of the present application. For example, the aforementioned and other operations and/or functions of the respective units in the terminal device 410 shown in FIG. 8 are to implement the corresponding processes in the

methods

210 and 300, respectively, the aforementioned and other operations and/or functions of the respective units in the terminal device 420 shown in FIG. Other operations and/or functions In order to implement the corresponding processes in the

methods

220 and 300, respectively, the aforementioned and other operations and/or functions of the units in the first access network device 430 shown in FIG. 10 are to implement the

methods

230 and 300, respectively. The aforementioned and other operations and/or functions of each unit in the mobility management network element 440 shown in FIG. 11 are to implement the corresponding processes in

methods

240 and 300, respectively, and are not repeated here for brevity.

The communication device of the embodiments of the present application is described above from the perspective of functional modules with reference to the accompanying drawings. It should be understood that the functional modules can be implemented in the form of hardware, can also be implemented by instructions in the form of software, and can also be implemented by a combination of hardware and software modules. Specifically, the steps of the method embodiments in the embodiments of the present application may be completed by hardware integrated logic circuits in the processor and/or instructions in the form of software, and the steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as hardware The execution of the decoding processor is completed, or the execution is completed by a combination of hardware and software modules in the decoding processor. Optionally, the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps in the above method embodiments in combination with its hardware. For example, the selection unit and the determination unit mentioned above may be implemented by a processor, and the receiving unit and the transmitting unit may be implemented by a transceiver.

FIG. 12 is a schematic structural diagram of a communication device 500 according to an embodiment of the present application.

As shown in FIG. 12 , the communication device 500 may include a processor 510 .

The processor 510 may call and run a computer program from the memory to implement the methods in the embodiments of the present application.

Please continue to refer to FIG. 12 , the communication device 500 may further include a memory 520 .

Wherein, the memory 520 may be used to store instruction information, and may also be used to store codes, instructions, etc. executed by the processor 510 . The processor 510 may call and run a computer program from the memory 520 to implement the methods in the embodiments of the present application. The memory 520 may be a separate device independent of the processor 510 , or may be integrated in the processor 510 .

Continuing to refer to FIG. 12 , the communication device 500 may further include a transceiver 530 .

The processor 510 may control the transceiver 530 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices. Transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include antennas, and the number of the antennas may be one or more.

It should be understood that each component in the communication device 500 is connected through a bus system, wherein the bus system 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 500 may be a terminal device in this embodiment of the application, and the communication device 500 may be implemented by the terminal device, the first access network device, and the mobility management network element in each method of the embodiment of the application. That is to say, the communication device 500 in the embodiment of the present application may correspond to the terminal device 410, the terminal device 420, the first access network device 430, or the mobility management network element 440 in the embodiment of the present application, and may Corresponding to the corresponding subject in executing the wireless communication method provided according to the embodiment of the present application, for brevity, details are not repeated here.

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

For example, the chip may be an integrated circuit chip, which has a signal processing capability, and can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The chip may also be referred to as a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip, or the like. Optionally, the chip can be applied to various communication devices, so that the communication device installed with the chip can execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.

FIG. 13 is a schematic structural diagram of a chip 600 according to an embodiment of the present application.

As shown in FIG. 13 , the chip 600 includes a processor 610 .

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

Please continue to refer to FIG. 13 , the chip 600 may further include a memory 620 .

The processor 610 may call and run a computer program from the memory 620 to implement the methods in the embodiments of the present application. The memory 620 may be used to store instruction information, and may also be used to store codes, instructions and the like executed by the processor 610 . The memory 620 may be a separate device independent of the processor 610 , or may be integrated in the processor 610 .

Please continue to refer to FIG. 13 , the chip 600 may further include an input interface 630 .

The processor 610 may control the input interface 630 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.

Please continue to refer to FIG. 13 , the chip 600 may further include an output interface 640 .

The processor 610 can control the output interface 640 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

It should be understood that the chip 600 can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in the various methods in the embodiments of the present application, and can also implement the various methods in the embodiments of the present application. For the sake of brevity, the corresponding process implemented by the terminal device in FIG. 1 is not repeated here.

It should also be understood that various components in the chip 600 are connected through a bus system, wherein the bus system 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:

General-purpose processor, Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates Or transistor logic devices, discrete hardware components, and so on.

The processor may be used to implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of this application. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module may be located in random access memory, flash memory, read-only memory, programmable read-only memory or erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

The memory mentioned above includes but is not limited to:

Volatile memory and/or non-volatile memory. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, 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 random access memory (Direct Rambus RAM, DR RAM).

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

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program. The computer-readable storage medium stores one or more programs, and the one or more programs include instructions, which, when executed by a portable electronic device including a plurality of application programs, can cause the portable electronic device to execute the embodiments of the present application. method of wireless communication.

Optionally, the computer-readable storage medium can be applied to the terminal device, the first access network device, or the mobility management network element in the embodiment of the present application, and the computer program enables the computer to execute each of the various functions provided in the embodiment of the present application. For the sake of brevity, the corresponding process implemented by the corresponding execution body in the method will not be repeated here.

The embodiments of the present application also provide a computer program product, including a computer program.

Optionally, the computer program product may be applied to the terminal device, the first access network device, or the mobility management network element in the embodiments of the present application, and the computer program enables the computer to execute the corresponding functions in the various methods of the embodiments of the present application. For the sake of brevity, the corresponding process implemented by the execution body will not be repeated here.

A computer program is also provided in the embodiments of the present application. When the computer program is executed by the computer, the computer can execute the wireless communication method provided by the embodiments of the present application.

Optionally, the computer program may be applied to the terminal device, the first access network device, or the mobility management network element in the embodiment of the present application, and when the computer program runs on the computer, the computer executes the steps of the embodiment of the present application. For the sake of brevity, the corresponding processes implemented by the corresponding execution bodies in each method will not be repeated here.

Embodiments of the present application further provide a communication system, which may include the above-mentioned terminal equipment and access network equipment to form a communication system 100 as shown in FIG. 1 , which is not repeated here for brevity.

It should be noted that the terms "system" and the like in this document may also be referred to as "network management architecture" or "network system" and the like. It should also be understood that the terms used in the embodiments of the present application and the appended claims are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. For example, as used in the embodiments of this application and the appended claims, the singular forms "a," "the," "above," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. meaning.

Those skilled in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled persons may use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of the embodiments of the present application. If implemented in the form of a software functional unit and sold or used as a stand-alone product, it may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence, or the parts that make contributions to the prior art or the parts of the technical solutions, and the computer software products are 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 execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage medium includes: a U disk, a removable hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk and other media that can store program codes.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other manners. For example, the division of units, modules or components in the apparatus embodiments described above is only a logical function division, and other division methods may be used in actual implementation. For example, multiple units, modules or components may be combined or integrated To another system, or some units or modules or components can be ignored, or not implemented. For another example, the above-mentioned units/modules/components described as separate/display components may or may not be physically separated, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units/modules/components may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

Finally, it should be noted that the mutual coupling or direct coupling or communication connection shown or discussed above may be through some interfaces, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms .

The above contents are only specific implementations of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Changes or substitutions should all be covered within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

A wireless communication method, comprising:

The terminal equipment selects the camping cell of the terminal equipment according to the slicing requirements of the terminal equipment.
The method according to claim 1, wherein the terminal device selects the camping cell of the terminal device according to the slicing requirements of the terminal device, comprising:

acquiring, by the terminal device, slices supported by the first cell and slices supported by neighboring cells of the first cell;

The terminal device determines the first cell as the camping cell of the terminal device in the case that the slice supported by the first cell and the slice supported by the neighboring cell meet the slice requirement of the terminal device.
The method according to claim 2, wherein the information of the slices supported by the first cell is included in the first system information.
The method according to claim 3, wherein the terminal device is in an idle state, and the first system information is system information received when the terminal device needs to perform cell selection or cell reselection.
The method according to claim 3, wherein the first system information further comprises an identifier of the neighbor cell and information of slices supported by the neighbor cell.
The method according to claim 3, wherein the method further comprises:

The terminal device searches for second system information of the neighboring cell, where the second system information includes information of slices supported by the neighboring cell.
The method according to claim 2, wherein the method further comprises:

The terminal device sends a session establishment request, where the session establishment request includes information of slices that the terminal device expects to use and that the neighboring cell supports.
A wireless communication method, comprising:

The terminal device sends a first message to the first access network device, where the first message includes information of at least one slice expected to be used by the terminal device, and the at least one slice is used by the first access network device to determine the the second access network device of the terminal device.
The method according to claim 8, wherein the first message is radio resource control RRC signaling.
The method according to claim 8 or 9, wherein the method further comprises:

The terminal device sends an uplink non-access stratum NAS message to the mobility management network element, where the uplink NAS message includes a protocol data unit PDU session establishment request and information of a slice used for establishing a session.
The method according to any one of claims 8 to 10, wherein the method further comprises:

The terminal device receives a first protocol data unit PDU session establishment accept message sent by the first access network device, where the first PDU session establishment accept message is used to indicate that the PDU session establishment is successful.
A wireless communication method, comprising:

The first access network device receives a first message sent by the terminal device, where the first message includes information of at least one slice that the terminal device expects to use;

The first access network device determines the second access network device of the terminal device based on the information of the at least one slice.
The method according to claim 12, wherein the first message is RRC signaling.
The method according to claim 12, wherein the first access network device determines the second access network device of the terminal device based on the information of the at least one slice, comprising:

The first access network device determines an access network device that is adjacent to the first access network device and that can support the first slice as a second access network device.
The method according to claim 14, wherein the first slice is a subset or a complete set of slices in the at least one slice that are not supported by the first access network device.
The method of claim 14, wherein the method further comprises:

The first access network device sends a second message to the mobility management network element, where the second message includes information of the first slice supported by the second access network device and the first access network Information about the second slice supported by the network device.
The method of claim 14, wherein the method further comprises:

The first access network device receives a third message sent by the mobility management network element, where the third message is used to establish a PDU session, and the third message includes the identifier of the tunnel of the user plane network element.
The method of claim 17, wherein the third message further includes information of the first slice.
The method according to any one of claims 12 to 18, wherein the method further comprises:

assigning, by the first access network device, an identifier of the tunnel of the second access network device;

The first access network device sends a notification message to the second access network device, where the notification message includes an identifier of the tunnel of the second access network device.
The method of claim 19, wherein the method further comprises:

The first access network device sends the identifier of the tunnel of the second access network device to the session management network element.
The method according to any one of claims 12 to 20, wherein the method further comprises:

The first access network device sends a first protocol data unit PDU session establishment accept message to the terminal device, where the first PDU session establishment accept message is used to indicate that the PDU session establishment is successful.
A wireless communication method, comprising:

The mobility management network element receives a second message sent by the first access network device, where the second message includes information about the first slice supported by the second access network device and the second slice supported by the first access network device Information.
The method of claim 22, wherein the method further comprises:

receiving, by the mobility management network element, an uplink non-access stratum NAS message sent by the terminal device, where the uplink NAS message includes a protocol data unit PDU session establishment request and information on a slice used for establishing a session;

In the case that the first access network device or the second access network device supports the slice used for establishing the session, agreeing to establish the PDU session;

In the case that neither the first access network device nor the second access network device supports the slice used for the session to be established finally, the establishment of the PDU session is refused.
The method according to claim 22 or 23, wherein the method further comprises:

The mobility management network element sends a third message to the first access network device, where the third message is used to establish a PDU session, and the third message includes an identifier of the tunnel of the user plane network element.
A terminal device, characterized in that it includes:

A selection unit, configured to select a camping cell of the terminal device according to the slicing requirement of the terminal device.
A terminal device, characterized in that it includes:

a sending unit, configured to send a first message to a first access network device, where the first message includes information of at least one slice expected to be used by the terminal device, and the at least one slice is used for the first access network The device determines the second access network device of the terminal device.
A first access network device, comprising:

a receiving unit, configured to receive a first message sent by a terminal device, where the first message includes information of at least one slice expected to be used by the terminal device;

a determining unit, configured to determine a second access network device of the terminal device based on the information of the at least one slice.
A mobility management network element, comprising:

a receiving unit, configured to receive a second message sent by the first access network device, where the second message includes information about the first slice supported by the second access network device and the second slice supported by the first access network device Information.
A terminal device, characterized in that it comprises: a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the computer program according to claims 1 to 7 The method of any one of or the method of any one of claims 8 to 11.
A first access network device, comprising:

A processor and a memory for storing a computer program, the processor for invoking and running the computer program stored in the memory to perform the method of any one of claims 12 to 21 .
A mobility management network element, comprising:

A processor and a memory for storing a computer program, the processor for invoking and running the computer program stored in the memory to perform the method of any one of claims 22 to 24.
A chip, characterized in that, comprising:

A processor for invoking and running a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 7, and the method according to any one of claims 8 to 11 , the method of any one of claims 12 to 21 or the method of any one of claims 22 to 24.
A computer-readable storage medium, characterized in that it is used for storing a computer program, the computer program causes a computer to execute the method according to any one of claims 1 to 7, and any one of claims 8 to 11. The method, the method of any one of claims 12 to 21 or the method of any one of claims 22 to 24.
A computer program product, comprising computer program instructions that cause a computer to perform the method of any one of claims 1 to 7, and the method of any one of claims 8 to 11 , the method of any one of claims 12 to 21 or the method of any one of claims 22 to 24.
A computer program, characterized in that the computer program causes a computer to perform the method as claimed in any one of claims 1 to 7, the method as claimed in any one of claims 8 to 11, and the method as claimed in claim 12 The method of any one of to 21 or the method of any one of claims 22 to 24.