CN116250290A

CN116250290A - Wireless communication method, terminal equipment, first access network equipment and network element

Info

Publication number: CN116250290A
Application number: CN202080105267.0A
Authority: CN
Inventors: 杨皓睿; 付喆
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2023-06-09
Also published as: WO2022126641A1

Abstract

The embodiment of the application provides a wireless communication method, terminal equipment, first access network equipment and network elements, wherein the method comprises the following steps: and the terminal equipment selects a resident cell of the terminal equipment according to the slicing requirement of the terminal equipment. In the method, the terminal equipment selects the resident cell of the terminal equipment according to the slicing requirement of the terminal equipment, and can consider whether the neighbor cell of the resident cell supports the slicing expected to be used by the user equipment or not while selecting the resident cell, which is equivalent to ensuring that the proper second access network equipment can be selected by the first access network equipment while selecting the resident cell, and based on the fact, the success rate of session establishment and the success rate of service transmission can be improved.

Description

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

Technical Field

The embodiment of the application relates 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

For Dual-connectivity (DC) scenarios, two access network devices may connect with User Equipment (UE) and transmit data simultaneously. Namely a first access network device and a second access network device. Radio resource control (Radio Resource Control, RRC) signaling for the UE may only be addressed to the first access network device, but data may be transmitted simultaneously through both the first access network device and the second access network device.

The first access network device will select the second access network device only when it is required to transfer data, i.e. to establish a protocol data unit (Protocol Data Unit, PDU) session, and will assist in establishing a tunnel for transferring data between the second access network device and the user plane function (User Plane Function, UPF).

However, if the second access network device is not able to support the slice that the user device expects to use, this may result in a failure of the traffic transmission.

Disclosure of Invention

The embodiment of the application provides a wireless communication method, terminal equipment, first access network equipment and network elements, which can ensure that second access network equipment supports slicing expected to be used by user equipment, and further can improve success rate of service transmission.

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

and the terminal equipment selects a resident cell of the terminal equipment according to the slicing requirement of the terminal equipment.

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

the terminal device sends a first message to a first access network device, wherein the first message comprises information of at least one slice which the terminal device expects to use, and the at least one slice is used for determining a second access network device of the terminal device by the first access network device.

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

the method comprises the steps that first access network equipment receives a first message sent by terminal equipment, wherein the first message comprises information of at least one slice which is expected to be used by the terminal equipment;

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 a fourth aspect, there is provided a wireless communication method comprising:

the mobility management network element receives a second message sent by the first access network device, wherein the second message comprises information of a first slice supported by the second access network device and information of a second slice supported by the first access network device.

A fifth aspect provides a terminal device for performing the method of any one of the first to second aspects or each implementation thereof. Specifically, the terminal device comprises functional modules for performing the method in any one of the above-mentioned first to second aspects or in various implementations thereof.

In a sixth aspect, a first access network device is provided for performing the method of the third aspect or implementations thereof. In particular, the first access network device comprises functional modules for performing the method of the third aspect or implementations thereof.

A seventh aspect provides a mobility management network element for performing the method of the fourth aspect or implementations thereof. In particular, the mobility management network element comprises functional modules for performing the method of the fourth aspect described above or in various implementations thereof.

In an eighth aspect, a terminal device is provided that includes 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 first aspect to the second aspect or each implementation manner thereof.

In a ninth aspect, a first access network device is provided that includes 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, to perform the method according to the third aspect or implementations thereof.

In a tenth aspect, a mobility management network element is provided, 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 fourth aspect or various implementation manners thereof.

An eleventh aspect 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, a computer-readable storage medium is provided for storing a computer program that causes a computer to perform the method of any one of the above first to fourth aspects or implementations thereof.

In a thirteenth aspect, there is provided 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, there is provided 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 scheme, the terminal device selects the resident cell of the terminal device according to the slicing requirement of the terminal device, and can consider whether the neighbor cell of the resident cell supports the slicing expected to be used by the user device while selecting the resident cell, which is equivalent to ensuring that the proper second access network device can be selected by the first access network device while selecting the resident cell, and based on the fact, the success rate of session establishment and the success rate of service transmission can be improved.

Drawings

Fig. 1 is an example of a communication system provided in an embodiment of the present application.

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

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

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

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

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

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

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

Fig. 13 is a schematic block diagram of a chip provided in an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden for the embodiments herein, are intended to be within the scope of the present application.

The embodiments of the present application may be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, long term evolution advanced (Advanced long term evolution, LTE-a) system, new Radio, NR system evolution system, LTE over unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR over unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, universal mobile communication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), next generation communication system or other communication system, etc.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, with the development of communication technology, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, and the like, to which the embodiments of the present application can also be applied.

The frequency spectrum of the application in the embodiments of the present application is not limited. For example, embodiments of the present application may be applied to licensed spectrum as well as unlicensed spectrum.

Fig. 1 schematically shows a communication system 100 for application of the present application. As shown in fig. 1, the communication system 100 mainly includes a terminal Equipment (UE) 101, AN Access Network (AN) device 102, AN Access and mobility management function (Access and Mobility Management Function, AMF) entity 103, a session management function (Session Management Function, SMF) entity 104, a User plane function (User Plane Function, UPF) entity 105, a policy control function (Policy Control function, PCF) entity 106, a unified Data management (Unified Data Management, UDM) entity 107, a Data Network (DN) 108, AN application function (Application Function, AF) entity 109, AN authentication server function (Authentication Server Function, AUSF) entity 110, and a Network slice selection function (Network Slice Selection Function, NSSF) entity 111.

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

In the communication system 100, the UDM entity 107 is a subscription database in the core network, storing subscription data of users in the 5G network. The AMF entity 103 is a mobility management function in the core network, the SMF entity 104 is a session management function in the core network, and the AMF entity 103 is responsible for forwarding session management related messages between the UE 101 and the SMF entity 104 in addition to mobility management of the UE 101. PCF entity 106 is a policy management function in the core network responsible for formulating policies related to mobility management, session management, charging, etc. for 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 is established from the UE 101 to the UPF entity 105 under the control of the SMF entity 104, thereby performing data transmission. The AMF entity 103 and the SMF entity 104 acquire user subscription data from the UDM entity 107 via the N8 and N10 interfaces, respectively, and acquire policy data from the PCF entity 106 via the N15 and N7 interfaces.

In addition, a network open function (Network Exposure Function, NEF) entity is also present in the communication system 100 for interfacing with a third party application server for information transfer between the core network node and the third party application.

The UE 101 can also be referred to as a user equipment, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, user device, or the like. The terminal device may be a Station (ST) in a WLAN, may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) device, a handheld device with wireless communication functionality, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, and a next generation communication system, such as a terminal device in an NR network or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc. By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

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

In this embodiment, the AN device 102 provides services for a cell, where the UE 101 communicates with the AN device 102 through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) used by the cell, and the cell may be a cell corresponding to the AN device 102 (e.g., a base station), and the cell may belong to a macro base station, or may belong to a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

The above-described communication system 100 is exemplified by a 5G communication system, and the present application is not limited to this, and may be applied to other 3GPP communication systems, such as a 4G communication system, or a future 3GPP communication system.

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

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., 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.

Network slices may be deployed in the communication system 100 in embodiments of the present application. The network slice may be identified using Single network slice selection assistance information (Single-Network Slice Selection Assistance Information, S-nsai). The set of S-NSSAIs becomes NSSAIs. When the UE 101 needs to use the network slice, the AMF entity 103 needs to request the slice use first, and after the AMF entity 103 agrees, the UE 101 requests to establish a PDU session in the slice to transmit data. The UE 101 places the S-nsai to be requested in the request NSSAI (Requested NSSAI) based on the service, and the request nsai is sent to the AMF entity 103 contained in the registration request (Registration request). The AMF entity 103 determines NSSAI (Allowed NSSAI) permission based on the subscription of the UE 101 and the scope of the network slice deployment, allowing nsais to be sent to the UE 101 in a registration accept (Registration accept) message and also to the AN device 102 in AN N2 message. After receiving the allowed nsai, the UE 101 needs to establish a PDU session in a slice corresponding to the selected service among the slices in the allowed nsai. The PDU session establishment is completed before data can be transmitted and received.

At network deployment, the coverage of each slice may be different, and the AMF entity 103 needs to ensure that all slices in the nsai are allowed to cover a registration area (Registration area) allocated by the AMF entity 103 to the UE 101, such as a tracking area list (TA list), when deciding to allow the nsai. The AMF entity 103 obtains the S-NSSAI and 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 may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, and a Stand Alone (SA) networking 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 (DC) scenario, two access network devices may connect with a User Equipment (UE) and transmit data at the same time. Namely a first access network device and a second access network device. The first access network device may also be referred to as a Master Node (MN) and the second access network device may also be referred to as a Secondary Node (SN). Radio resource control (Radio Resource Control, RRC) signaling for the UE may only be addressed to the first access network device, but data may be transmitted simultaneously through both the first access network device and the second access network device. The first access network device will select the second access network device only when it is required to transfer data, i.e. to establish a protocol data unit (Protocol Data Unit, PDU) session, and will assist in establishing a tunnel for transferring data between the second access network device and the user plane function (User Plane Function, UPF). However, if the second access network device is not able to support the slice that the user device expects to use, this may result in a failure of the traffic transmission.

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 the slices 1, 2, 3, how to make the access network device of the cell 2 be the second access network device of the UE, so as to ensure that the UE can obtain the service of the slice 3 at the current location is a technical problem that needs to be solved in the field.

Fig. 3 shows a schematic flow chart of a wireless communication method 210 according to an embodiment of the present application, which method 210 may be performed by a terminal device. Such as 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 equipment selects a resident cell of the terminal equipment according to the slicing requirement of the terminal equipment.

For example, the terminal device selects the camping cell based on the slicing requirements and the slices supported by each of the plurality of cells.

In the embodiment of the present invention, the terminal device selects the resident cell of the terminal device according to the slicing requirement of the terminal device, and can consider whether the neighbor cell of the resident cell supports the slicing expected to be used by the user device while selecting the resident cell, which is equivalent to ensuring that the appropriate second access network device can be selected by the first access network device while selecting the resident cell, based on which the success rate of session establishment and the success rate of service transmission can be improved.

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

the terminal equipment acquires a slice supported by a first cell and a slice supported by a neighboring cell of the first cell;

and the terminal equipment determines the first cell as a resident cell of the terminal equipment under the condition that the slice supported by the first cell and the slice supported by the adjacent cell meet the slice requirement of the terminal equipment. The slicing requirement of the terminal equipment is transferred to the access stratum by the NAS layer of the UE, and can be triggered by the access stratum inquiring the NAS layer.

In other words, the terminal device indicates that the neighboring cell is likely to become a second access network device in the future according to the slice required by the terminal device if the slice supported by the current cell and the slice supported by the neighboring cell can meet the slice requirement of the terminal device. Thus, the terminal device can select the current cell as the cell in which it resides. Because the neighbor cell supports the desired slice of the terminal device, when the terminal device initiates the session establishment using the slice, the base station of the current cell is ensured to select the base station of the neighbor cell to be the second access network device, and the session is established through the second access network device.

In some embodiments of the present application, the information of the slice 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 neighboring cell and information of a slice supported by the neighboring cell.

For example, when the terminal device is in idle state and cell selection/reselection is required, the information of the slice supported by the access network device, such as S-nsai, is first obtained from the first system information of the access network device that can be received. In addition, neighbor cell information in the first system information may be obtained, where the neighbor cell information includes an Identifier (ID) of a neighbor cell, and may further include information of a slice supported by the neighbor cell. Based on this, the terminal device may determine a camping cell based on the slicing requirement, information of slices supported by the access network device, and information of slices supported by the neighboring cell.

Optionally, the method 210 may further include:

The terminal equipment searches second system information of the adjacent cell, wherein the second system information comprises information of slices supported by the adjacent cell.

For example, when the terminal device is in idle state and cell selection/reselection is required, the information of the slice supported by the access network device, such as S-nsai, is first obtained from the first system information of the access network device that can be received. In addition, in the case that the first system information includes the identifier of the neighboring cell but does not include the information of the slice supported by the neighboring cell, the terminal device acquires the neighboring cell information in the first system information, wherein the neighboring cell information includes the Identifier (ID) of the neighboring cell, and searches the second system information of the neighboring cell, and includes the information of the slice supported by the neighboring cell. Based on this, the terminal device may determine a camping cell based on the slicing requirement, information of slices supported by the access network device, and information of slices 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 including information of a slice that the terminal device expects to use and that is supported by the neighboring cell.

Fig. 4 shows a schematic flow chart of a wireless communication method 220 according to an embodiment of the present application, which method 220 may be performed by a terminal device. Such as 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 equipment sends a first message to the first access network equipment, wherein the first message comprises information of at least one slice which is expected to be used by the terminal equipment, and the at least one slice is used by the first access network equipment to determine second access network equipment of the terminal equipment. Optionally, the information of the at least one slice may include an identification of each of the at least one slice; for example, the information of the at least one slice may include S-NSSAI of the 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 may select a suitable second access network device in advance, and then, after the first access network device notifies the mobility management network element of the slice supported by the second access network device, it may be ensured that the mobility management network element does not reject the establishment of the session, based on which the success rate of session establishment and the success rate of service transmission may be improved.

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 equipment sends an uplink non-access stratum (NAS) message to a mobility management network element, wherein the uplink NAS message comprises a Protocol Data Unit (PDU) session establishment request and information of a slice used for establishing a session. Alternatively, the mobility management network element may be a mobility management function (Accessand Mobility Management Function, AMF), or of course, may be an entity having 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 identification of the slice used for establishing the session; for example, the information of the slice used to establish the session may be S-NSSAI of the slice used to establish the session.

the terminal equipment receives a first protocol data unit PDU session establishment acceptance message sent by the first access network equipment, wherein the first PDU session establishment acceptance message is used for indicating that PDU session establishment is successful.

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

Fig. 5 shows a schematic flow chart of a wireless communication method 230 according to an embodiment of the present application, which method 230 may be performed by an access network device. Such as AN device 102 shown in fig. 1 or a first access network device shown in fig. 2.

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

s231, the first access network equipment receives a first message sent by terminal equipment, wherein the first message comprises information of at least one slice which is expected to be used by the terminal equipment; optionally, the information of the at least one slice may include an identification of each of the at least one slice; for example, the information of the at least one slice may include 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 the access network device which is adjacent to the first access network device and can support the first slice as a second access network device. Optionally, the first slice is a subset or a full set of slices of 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, wherein the second message comprises information of the first slice supported by the second access network device and information of a second slice supported by the first access network device. Alternatively, the mobility management network element may be a mobility management function (Accessand Mobility Management Function, AMF), or of course, may be an entity having 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 identification of the first slice; such as S-nsai for the first slice. Optionally, the information of the second slice may include an identification of the second slice; such as S-nsai for the second slice.

the first access network device receives a third message sent by the mobility management network element, wherein the third message is used for establishing a PDU session, and the third message comprises the identification of the tunnel of the user plane network element. Alternatively, the user plane network element may be a user plane function (User Plane Function, UPF), or of course, may 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 identification of the first slice; such as S-nsai for the first slice.

the first access network equipment distributes the identification of the tunnel of the second access network equipment; the first access network device sends a notification message to the second access network device, wherein the notification message comprises an identifier of a tunnel of the second access network device.

and the first access network equipment sends the identification of the tunnel of the second access network equipment to a session management network element. Alternatively, the session management network element may be a session management function (Session Management Function, SMF), or of course, may be an entity having 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 acceptance message to the terminal device, wherein the first PDU session establishment acceptance message is used for indicating that PDU session establishment is successful.

The wireless communication method provided in the embodiment of the present application will be described below from the point of view of a mobility management network element in conjunction with fig. 5.

Fig. 6 shows a schematic flow chart of a wireless communication method 240 according to an embodiment of the present application, which method 240 may be performed by a mobility management network element. Such as the AMF entity 103 shown in fig. 1 or the AMF shown in fig. 2. Note that, the mobility management network element in the embodiment of the present application may be, for example, an access and mobility management function (Accessand Mobility Management Function, AMF) in a 5G communication system, and of course, may also be an entity having a mobility management function in another 3GPP communication system, which 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 of a first slice supported by the second access network device and information of a second slice supported by the first access network device. Optionally, the information of the first slice may include an identification of the first slice; such as S-nsai for the first slice. Optionally, the information of the second slice may include an identification of the second slice; such as S-nsai for the second slice.

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

The mobile management network element receives an uplink non-access stratum (NAS) message sent by a terminal device, wherein the uplink NAS message comprises a Protocol Data Unit (PDU) session establishment request and information of a slice used for establishing a session; agreeing to establish a PDU session in the case where the first access network device or the second access network device supports the slice used to establish the session; in case neither the first access network device nor the second access network device supports the slice used by the final set-up session, the set-up of the PDU session is refused. Optionally, the information of the slice used for establishing the session may be an identification of the slice used for establishing the session; for example, the information of the slice used to establish the session may be S-NSSAI of the slice used to establish the session.

the mobility management network element sends a third message to the first access network device, wherein the third message is used for establishing a PDU session, and the third message comprises the identification 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 be referred to by mutual reference, and are not described herein for brevity.

Fig. 7 shows a schematic flow chart of a wireless communication method 300 according to an embodiment of the present application, which method 300 may be interactively performed 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, 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, 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 may be replaced with an entity having a mobility management function in another 3GPP communication system, and the SMF shown in fig. 7 may be replaced with an entity having a session management function in another 3GPP communication system, which is not limited in this application.

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

s301, the terminal equipment sends RRC message to the first access network equipment, wherein the RRC message comprises S-NSSAI 1,2 and 3.

For example, the terminal device notifies the first access network device of information about an intention slice (intra-slice) of the terminal device, such as S-nsai 1, S-nsai 2, and S-nsai 3, during RRC connection establishment.

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

For example, the first access network device adds the slice supported by the neighboring cell according to the information of the intended slice of the terminal device, and pre-selects the access network device adjacent to the first access network device, which can support the intended slice, as the second access network device, so as to ensure that all slices supported by the first access network device and the second access network device contain the intended slice of the terminal device.

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

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

S304, the terminal equipment sends an uplink Non-Access Stratum (NAS) message (UL NAS transport) to the AMF, wherein the uplink NAS message comprises an identification of a PDU session, a PDU session establishment request and S-NSSAI3.

For example, when the terminal device side has a service to be transmitted, the terminal device initiates a session establishment request, where 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 identification of the PDU session and information of the slice used to establish the session. Alternatively, the information of the slice used to establish the session may be an identification of the slice used to establish the session, such as S-NSSAI. As an example, the information of the slice used to establish the session in fig. 7 is S-NSSAI3.

The AMF determines whether the S-nsai 3 is supported by the first access network device or the second access network device as long as there is one access network device to support, and agrees to session establishment S305.

For example, if the AMF finds that the first access network device does not support S-nsai 3, but the second access network device supports S-nsai 3, the AMF agrees to session establishment; if neither the first access network device nor the second access network device supports S-NSSAI 3, the AMF denies the session establishment.

And S306, performing PDU session establishment between the AMF and the SMF.

For example, in the case where the AMF agrees to establish a session, after the AMF sends a PDU session establishment request to the SMF, the SMF selects a UPF and assigns an identifier (Tunnel ID) of a Tunnel of the UPF, and the AMF receives the SMF and sends a PDU session establishment response, where the PDU session establishment response includes the identifier of the Tunnel of the UPF.

S307, the AMF sends a third message to the first access network equipment, wherein the third message is used for establishing the PDU session, and the third message comprises the identification of the tunnel of the UPF. Optionally, the third message further comprises information of a slice used for establishing the session. Alternatively, the information of the slice used to establish the session may be an identification of the slice used to establish the session, such as S-NSSAI. For example, the third message includes an identification of the tunnel of the UPF and S-NSSAI 3.

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

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

And S308, the first access network equipment sends the identification of the tunnel of the second access network equipment to the SMF.

S309, the terminal device receives the PDU session establishment acceptance (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, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions 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 in detail. 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 considered as disclosed herein.

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 embodiments 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.

Method embodiments of the present application are described in detail above in connection with fig. 1-7, and apparatus embodiments of the present application are described in detail below.

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

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

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

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

acquiring a slice supported by a first cell and a slice supported by a neighboring cell of the first cell;

and determining the first cell as a resident cell of the terminal equipment under the condition that the slice supported by the first cell and the slice supported by the adjacent cell meet the slice requirement of the terminal equipment.

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 identification of the neighboring cell and information of a slice supported by the neighboring cell.

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

And searching second system information of the adjacent cell, wherein the second system information comprises information of a slice supported by the adjacent cell.

Fig. 9 is a schematic block diagram of a terminal device 420 of 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 that the terminal device desires to use, where the at least one slice is used by the first access network device to determine a second access network device of the terminal device.

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

and sending an uplink non-access stratum (NAS) message to the mobility management network element, wherein the uplink NAS message comprises a Protocol Data Unit (PDU) session establishment request and information of a slice used for establishing a session.

and receiving a first protocol data unit PDU (protocol data unit) session establishment acceptance message sent by the first access network equipment, wherein the first PDU session establishment acceptance message is used for indicating that PDU session establishment is successful.

Fig. 10 is a schematic block diagram of a first access network device 430 of 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 that the terminal device desires to use;

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:

and determining the access network equipment which is adjacent to the first access network equipment and can support the first slice as second access network equipment.

In some embodiments of the present application, the first slice is a subset or a full set of slices of 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:

and sending a second message to a mobility management network element, wherein the second message comprises information of the first slice supported by the second access network device and information of a second slice supported by the first access network device.

and receiving a third message sent by the mobility management network element, wherein the third message is used for establishing the PDU session and comprises the identification 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.

allocating the identification of the tunnel of the second access network device;

and sending a notification message to the second access network equipment, wherein the notification message comprises the identification of the tunnel of the second access network equipment.

and sending the identification of the tunnel of the second access network device to a session management network element.

And sending a first protocol data unit PDU session establishment acceptance message to the terminal equipment, wherein the first PDU session establishment acceptance message is used for indicating that PDU session establishment is successful.

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

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

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

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 terminal equipment, wherein the uplink NAS message comprises a Protocol Data Unit (PDU) session establishment request and information of a slice used for establishing a session;

agreeing to establish a PDU session in the case where the first access network device or the second access network device supports the slice used to establish the session;

in case neither the first access network device nor the second access network device supports the slice used by the final set-up session, the set-up of the PDU session is refused.

And sending a third message to the first access network equipment, wherein the third message is used for establishing a PDU session, and the third message comprises the identification of the tunnel of the user plane network element.

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 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. 11 may correspond to respective bodies in performing the wireless communication method provided in the embodiment of the present application, respectively. For example, the foregoing and other operations and/or functions of the respective units in the terminal device 410 shown in fig. 8 are for implementing the respective flows in the

methods

210 and 300, respectively, the foregoing and other operations and/or functions of the respective units in the terminal device 420 shown in fig. 9 are for implementing the respective flows in the

methods

220 and 300, respectively, the foregoing and other operations and/or functions of the respective units in the first access network device 430 shown in fig. 10 are for implementing the respective flows in the

methods

230 and 300, respectively, and the foregoing and other operations and/or functions of the respective units in the mobility management network element 440 shown in fig. 11 are for implementing the respective flows in the

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 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 embodiments in the embodiments 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 embodiments 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 selection unit and the determination unit referred to 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 of an embodiment of the present application.

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

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

With continued reference to fig. 12, the communication device 500 may also include a memory 520.

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

With continued reference to fig. 12, the communication device 500 may also include a transceiver 530.

The processor 510 may control the transceiver 530 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. The transceiver 530 may include a transmitter and a receiver. The transceiver 530 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 500 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 500 may be a terminal device of the embodiment of the present application, and the communication device 500 may implement respective flows implemented by the terminal device, the first access network device, and the mobility management network element in the respective methods of the embodiment of the present application, that is, the communication device 500 of 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 correspond to respective main bodies in performing the wireless communication method provided according to the embodiment of the present application, which are not described 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 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. 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. 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.

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

With continued reference to fig. 13, the chip 600 may further include a memory 620.

Wherein the processor 610 may call and run a computer program from the memory 620 to implement the methods in embodiments of the present application. 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. The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

With continued reference 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 in particular, may acquire information or data sent by the other devices or chips.

With continued reference to fig. 13, the chip 600 may further include an output interface 640.

Wherein the processor 610 may control the output interface 640 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 600 may be applied to a network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, or may implement a corresponding flow implemented by a terminal device 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 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.

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 (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 a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded 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 an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous 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 for 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 methods provided by embodiments of the present application.

Optionally, the computer readable storage medium may be applied to a terminal device, a first access network device, or a mobility management network element in the embodiments of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by a corresponding execution body in each method provided in the embodiments 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, a first access network device, or a mobility management network element in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by a corresponding execution body in each method in the embodiments of the present application, which is not described herein for brevity.

A computer program is also provided in an embodiment of the present application. The computer program, when executed by a computer, enables the computer to perform the wireless communication method provided by the embodiments of the present application.

Optionally, the computer program may be applied to a terminal device, a first access network device, or a mobility management network element in the embodiments of the present application, where when the computer program runs on a computer, the computer is caused to execute a corresponding procedure implemented by a corresponding execution body in each method in the embodiments of the present application, which is not described herein for brevity.

The embodiment of the present application further provides a communication system, which may include the terminal device and the access network device that are referred to above, so as to form the communication system 100 shown in fig. 1, 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 examples 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 essentially or, what contributes to the prior art, or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, 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.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. 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 purposes 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 embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto, and any person skilled in the art may easily think about changes or substitutions within the technical scope of the embodiments of the present application, and all changes and substitutions are included in the protection scope of the embodiments 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, comprising:

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

the terminal equipment acquires a slice supported by a first cell and a slice supported by a neighboring cell of the first cell;

and the terminal equipment determines the first cell as a resident cell of the terminal equipment under the condition that the slice supported by the first cell and the slice supported by the adjacent cell meet the slice requirement of the terminal equipment.
The method according to claim 2, characterized in that the information of the slices supported by the first cell is contained in the first system information.
A method according to claim 3, characterized in that the terminal device is in an idle state, and the first system information is system information received in case the terminal device needs a cell selection or a cell reselection.
A method according to claim 3, wherein the first system information further comprises an identification of the neighbor cell and information of the slices supported by the neighbor cell.
A method according to claim 3, characterized in that the method further comprises:

the terminal equipment searches second system information of the adjacent cell, wherein the second system information comprises information of slices supported by the adjacent cell.
The method according to claim 2, wherein the method further comprises:

the terminal device sends a session establishment request including information of a slice that the terminal device expects to use and that is supported by the neighboring cell.
A method of wireless communication, comprising:

the terminal device sends a first message to a first access network device, wherein the first message comprises information of at least one slice which the terminal device expects to use, and the at least one slice is used for determining a second access network device of the terminal device by the first access network device.
The method of claim 8, wherein the first message is radio resource control, RRC, signaling.
The method according to claim 8 or 9, characterized in that the method further comprises:

the terminal equipment sends an uplink non-access stratum (NAS) message to a mobility management network element, wherein the uplink NAS message comprises 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, further comprising:

the terminal equipment receives a first protocol data unit PDU session establishment acceptance message sent by the first access network equipment, wherein the first PDU session establishment acceptance message is used for indicating that PDU session establishment is successful.
A method of wireless communication, comprising:

the method comprises the steps that first access network equipment receives a first message sent by terminal equipment, wherein the first message comprises information of at least one slice which is expected to be used by the terminal equipment;

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.
The method of claim 12, wherein the first message is radio resource control, RRC, signaling.
The method of claim 12, wherein the first access network device determining a second access network device of the terminal device based on the information of the at least one slice comprises:

the first access network device determines the access network device which is adjacent to the first access network device and can support the first slice as a second access network device.
The method of claim 14, wherein the first slice is a subset or a full set of slices of 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, wherein the second message comprises information of the first slice supported by the second access network device and information of a second slice supported by the first access 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, wherein the third message is used for establishing a PDU session, and the third message comprises the identification of the tunnel of the user plane network element.
The method of claim 17, wherein the third message further comprises information for the first slice.
The method according to any one of claims 12 to 18, further comprising:

the first access network equipment distributes the identification of the tunnel of the second access network equipment;

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

and the first access network equipment sends the identification of the tunnel of the second access network equipment to a session management network element.
The method according to any one of claims 12 to 20, further comprising:

the first access network device sends a first protocol data unit PDU session establishment acceptance message to the terminal device, wherein the first PDU session establishment acceptance message is used for indicating that PDU session establishment is successful.
A method of wireless communication, comprising:

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

the mobile management network element receives an uplink non-access stratum (NAS) message sent by a terminal device, wherein the uplink NAS message comprises a Protocol Data Unit (PDU) session establishment request and information of a slice used for establishing a session;

agreeing to establish a PDU session in the case where the first access network device or the second access network device supports the slice used to establish the session;

in case neither the first access network device nor the second access network device supports the slice used by the final set-up session, the set-up of the PDU session is refused.
The method according to claim 22 or 23, characterized in that the method further comprises:

the mobility management network element sends a third message to the first access network device, wherein the third message is used for establishing a PDU session, and the third message comprises the identification of the tunnel of the user plane network element.
A terminal device, comprising:

and the selection unit is used for selecting the resident cell of the terminal equipment according to the slicing requirement of the terminal equipment.
A terminal device, comprising:

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 that the terminal device desires to use, where the at least one slice is used by the first access network device to determine a 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 that the terminal device desires to use;

and the determining unit is used for determining 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:

the receiving unit is configured to receive a second message sent by the first access network device, where the second message includes information of a first slice supported by the second access network device and information of a second slice supported by the first access network device.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory to perform the method of any of claims 1 to 7 or the method of any of claims 8 to 11.
A first 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 12 to 21.
A mobility management network element, 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 22 to 24.
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 7, 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 readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 7, 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 product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 7, 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 of any one of claims 1 to 7, 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.