CN116491163A

CN116491163A - Cell reselection method, device and storage medium

Info

Publication number: CN116491163A
Application number: CN202180078569.8A
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: 2021-03-30
Filing date: 2021-03-30
Publication date: 2023-07-25
Also published as: WO2022204914A1

Abstract

The application provides a cell reselection method, a cell reselection device and a storage medium, wherein the cell reselection method comprises the following steps: the terminal equipment determines a cell reselection mode according to whether the terminal equipment is out of the terminal equipment registration area RA currently. If the terminal device is about to leave or has left the RA, the terminal device needs to perform cell reselection based on the network slice and signal quality of the cell; if the terminal device is within the RA, the terminal device need only perform cell reselection based on the signal quality of the cell. By the method, the terminal equipment considers the network slices supported by the surrounding cells in the cell reselection only when the terminal equipment leaves or has left the RA, so that the complexity in replacing the cells in the RA is reduced, and the power consumption of the terminal equipment is reduced.

Description

Cell reselection method, device and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a cell reselection method, cell reselection equipment and a storage medium.

Background

Network slicing (slice) is a key technology for fifth generation (5th generation,5G) wireless communication networks, and is widely appreciated and studied by third generation partnership project (3rd Generation Partnership Project,3GPP) and other various international standardization organizations. The network slice can be customized for different services or manufacturers, different services need different network slices, and one terminal device can support and access a plurality of network slices at the same time.

When the cell signal of the terminal device becomes worse, the terminal device needs to perform cell reselection. In some scenarios, the terminal device may perform cell reselection taking into account only the cell signal quality, in other scenarios, the terminal device needs to consider not only the cell signal quality, but also the network slice of the cell. Therefore, how the terminal device determines which cell reselection mode to use for cell reselection is a technical problem that needs to be solved at present.

Disclosure of Invention

The embodiment of the application provides a cell reselection method, cell reselection equipment and a storage medium, which reduce the complexity of cell replacement of a terminal and reduce the power consumption of the terminal.

In a first aspect, an embodiment of the present application provides a cell reselection method, including: the terminal equipment determines a cell reselection mode; and the terminal equipment performs cell reselection according to the determined cell reselection mode.

In a second aspect, an embodiment of the present application provides a cell reselection method, including: the terminal equipment receives first information from network equipment, wherein the first information at least comprises first indication information, and the first indication information is used for indicating a cell reselection mode used by the terminal equipment; the terminal equipment determines a cell reselection mode according to the first information; and the terminal equipment performs cell reselection according to the determined cell reselection mode.

In a third aspect, an embodiment of the present application provides a cell reselection method, including: the network equipment determines first information, wherein the first information at least comprises first indication information, and the first indication information is used for indicating a cell reselection mode used by the terminal equipment; the network device sends the first information to the terminal device.

In a fourth aspect, an embodiment of the present application provides a terminal device, including a processing module, where the processing module is configured to determine a cell reselection mode; and carrying out cell reselection according to the determined cell reselection mode.

In a fifth aspect, an embodiment of the present application provides a network device, including a processing module and a sending module, where the processing module is configured to determine first information, where the first information includes at least first indication information, where the first indication information is used to indicate a cell reselection mode used by a terminal device; and the sending module is used for sending the first information to the terminal equipment.

In a sixth aspect, embodiments of the present application provide a terminal device, a memory and a processor, where the memory is configured to store a computer program, and the processor is configured to call and run the computer program from the memory, so that the processor runs the computer program to perform a method according to the first aspect of the present application.

In a seventh aspect, embodiments of the present application provide a network device, a memory, and a processor, where the memory is configured to store a computer program, and the processor is configured to invoke and run the computer program from the memory, so that the processor runs the computer program to perform a method according to the second aspect of the present application.

In an eighth aspect, embodiments of the present application provide a computer storage medium storing a computer program which, when run on a computer, causes the computer to perform the method according to the first aspect of the present application.

In a ninth aspect, embodiments of the present application provide a computer storage medium storing a computer program which, when run on a computer, causes the computer to perform the method according to the second aspect of the present application.

In a tenth aspect, embodiments of the present application provide a computer program product which, when run on a computer, causes the computer to perform the method according to the first aspect of the present application.

In an eleventh aspect, embodiments of the present application provide a computer program product which, when run on a computer, causes the computer to perform the method according to the second aspect of the present application.

The embodiment of the application provides a cell reselection method, a cell reselection device and a storage medium, wherein the method comprises the following steps: the terminal equipment determines a cell reselection mode according to whether the terminal equipment is out of the terminal equipment registration area RA currently. If the terminal device is about to leave or has left the RA, the terminal device needs to perform cell reselection based on the network slice and signal quality of the cell; if the terminal device is within the RA, the terminal device need only perform cell reselection based on the signal quality of the cell. By the method, the terminal equipment considers the network slices supported by the surrounding cells in the cell reselection only when the terminal equipment leaves or has left the RA, so that the complexity in replacing the cells in the RA is reduced, and the power consumption of the terminal equipment is reduced.

Drawings

Fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 2 is a schematic diagram of an end-to-end control plane protocol stack between a terminal and a core network;

FIG. 3 is a schematic diagram of the structure of S-NSSAI;

fig. 4 is a schematic flow chart of a UE registered network slice;

fig. 5 is a flow chart of a cell reselection method provided in an embodiment of the present application;

fig. 6 is a first interaction schematic diagram of determining a cell reselection mode by a terminal device according to an embodiment of the present application;

Fig. 7 is a second interaction schematic diagram of determining a cell reselection mode by a terminal device according to an embodiment of the present application;

fig. 8 is an interaction schematic diagram of a cell reselection method provided in an embodiment of the present application;

fig. 9 is an interaction diagram III of a cell reselection mode determined by a terminal device provided in an embodiment of the present application;

fig. 10 is an interaction diagram fourth of determining a cell reselection mode by a terminal device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 13 is a schematic hardware structure of a terminal device according to an embodiment of the present application;

fig. 14 is a schematic hardware structure of a network device according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below 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 from the present disclosure, are within the scope of the present disclosure.

The terms "comprises" and "comprising," and any variations thereof, in the description of the embodiments of the present application, the claims, and the above-described figures, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.

In order to better understand a cell reselection method provided by the embodiments of the present application, a network architecture related to the embodiments of the present application is described below. Fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application. As shown in fig. 1, the 5G network architecture promulgated by the 3GPP standard group includes:

a terminal (including user equipment, UE), AN access network supporting 3GPP technology (including radio access network, RAN or access network, AN), a user plane function (user plane function, UPF) network element, AN access and mobility management function (access and mobility management function, AMF) network element, a session management function (session management function, SMF) network element, a policy control function (policy control function, PCF) network element, AN application function (application function, AF), a Data Network (DN), a network slice selection function (Network Slice Selection Function, NSSF), AN authentication service function (Authentication Server Function, AUSF), a unified data management function (Unified Data Management, UDM).

Those skilled in the art will appreciate that the 5G network architecture shown in fig. 1 is not limiting of the 5G network architecture, and in particular implementations, the 5G network architecture may include more or fewer network elements than shown, or some combination of network elements, etc. It should be appreciated that the AN or RAN is characterized in fig. 1 by way of AN (R) AN.

The terminal may be a User Equipment (UE), a handheld terminal, a notebook computer, a subscriber unit (subscriber unit), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a personal digital assistant (personal digital assistant, PDA) computer, a tablet computer, a wireless modem (modem), a handheld device (handheld), a laptop computer (lap computer), a cordless phone (cordless phone) or a wireless local loop (wireless local loop, WLL) station, a machine type communication (machine type communication, MTC) terminal, a handheld device with wireless communication capabilities, a computing device, a processing device connected to a wireless modem, a drone, a vehicle-mounted device, a wearable device, a terminal in the internet of things, a virtual reality device, a terminal device in a future 5G network, a terminal in a future evolved public land mobile network (public land mobile network, PLMN), etc.

The access network device is an access device for accessing the terminal into the network architecture in a wireless mode, and is mainly responsible for radio resource management, quality of service (quality of service, qoS) management, data compression, encryption and the like at an air interface side. For example: base stations NodeB, evolved base stations eNodeB, base stations in a 5G mobile communication system or a new generation radio (NR) communication system, base stations in a future mobile communication system, etc.

The UPF network element, the AMF network element, the SMF network element and the PCF network element are network elements (core network elements for short) of the 3GPP core network. The UPF network element may be referred to as a user plane function network element, and is mainly responsible for transmission of user data, while the other network elements may be referred to as control plane function network elements, and are mainly responsible for authentication, registration management, session management, mobility management, policy control, and the like, so as to ensure reliable and stable transmission of user data.

The UPF network element may be used to forward and receive data of the terminal. For example, the UPF network element may receive data of a service from a data network, and transmit the data to a terminal through an access network device; the UPF network element may also receive user data from the terminal via the access network device and forward the user data to the data network. Wherein, the transmission resources allocated and scheduled by the UPF network element for the terminal are managed and controlled by the SMF network element. The bearer between the terminal and the UPF network element may include: user plane connection between a UPF network element and an access network device, and establishment of a channel between the access network device and a terminal. The user plane connection is a quality of service (quality of service, qoS) flow (flow) that can establish transmission data between the UPF network element and the access network device.

The AMF network element may be configured to manage access of the terminal to the core network, for example: location update of the terminal, registration of the network, access control, mobility management of the terminal, attachment and detachment of the terminal, and the like. The AMF network element may also provide a storage resource of the control plane for the session of the terminal in case of providing services for the session, to store a session identity, an SMF network element identity associated with the session identity, etc.

The SMF network element may be used to select a user plane network element for a terminal, redirect a user plane network element for a terminal, assign an internet protocol (internet protocol, IP) address for a terminal, establish a bearer (which may also be referred to as a session) between a terminal and a UPF network element, modify, release, and QoS control of a session.

The PCF network element is configured to provide policies, such as QoS policies, slice selection policies, etc., to the AMF network element, the SMF network element.

The AF network element is used for supporting the routing of application influence data with the interaction of the 3GPP core network element, accessing the network exposure function, interacting with the PCF network element to perform policy control and the like.

The DN may provide data services for users such as an IP Multimedia Service (IMS) network, the internet, etc. There may be various application servers (application server, AS) in the DN, providing different application services, such AS operator services, internet access or third party services, etc., and the AS may implement the AF function.

NSSF is used for selection of network slices, supporting functions of: selecting a set of network slice instances serving the UE; determining allowed network slice selection assistance information (Network Slice Selection Assistance Information, NSSAI) and, if necessary, mapping to subscribed Single network slice selection assistance information (Single-Network Slice Selection Assistance Information, S-NSSAI); determining a configured NSSAI and, if necessary, a mapping to a subscribed S-NSSAI; a set of AMFs likely to be used for querying the UE is determined, or a list of candidate AMFs is determined based on the configuration.

The AUSF is configured to receive a request for authenticating the terminal by the AMF, and forward the issued key to the AMF for authentication by requesting the key to the UDM.

The UDM includes functions of generation and storage of user subscription data, management of authentication data, and the like, supporting interaction with an external third party server.

The network elements in fig. 1 may be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform). It should be noted that, in the network architecture shown in the above figures, only network elements included in the entire network architecture are exemplarily described. In the embodiment of the present application, the network elements included in the entire network architecture are not limited.

In the process of communication between the terminal and the network, the terminal and the network follow the principle of peer-to-peer protocol stack, namely, each interface has peer-to-peer protocol functions to correspond. The end-to-end protocol stack in a 5G system is briefly described below.

Fig. 2 is a schematic diagram of an end-to-end control plane protocol stack between a terminal and a core network, as an example. As shown in fig. 2, the control plane is used to carry the interactive signaling between the terminal and the network side, the data transmission of the control plane is realized through Uu interface-N2 interface-N11 interface, and the signaling between different network elements is realized by adopting a mode of opposite terminal protocol stack.

The access layer of the terminal comprises the following steps from bottom to top: a Physical (PHY) layer, a medium access control (media access control, MAC) layer, a radio link control (radio link control, RLC) layer, a packet data convergence protocol (packet data convergence protocol, PDCP) layer, and a radio resource control (radio resource control, RRC) layer. The non-access stratum of the terminal device includes: a non-access mobility management (NAS mobile management, NAS-MM) layer and a non-access session management (NAS session management, NAS-SM) layer. The NAS-SM and the NAS-MM both belong to a non-access stratum (NAS layer) protocol of the N1 interface, and support a session management function between the terminal and the SMF network element, and the NAS-MM supports a mobility management function between the terminal and the AMF network element, such as registration management, connection management, activation and deactivation operations of a user plane connection, and the like.

With the increasing demand for communication, wireless communication networks are required to cope with various emerging application scenarios, such as enhanced mobile bandwidth (Enchanced Mobile Broadbrand, eMBB), ultra-high reliability low-latency communication (URLLC), mass internet of things (Massive Internet of Things, MIoT), internet of vehicles (Verticle to Everything, V2X), and the like. To meet the new communication requirements described above, 5G networks introduce a slicing technique (Network sliming).

Network slicing is one of the key technologies of 5G, namely, splitting management is performed on network data, which essentially divides a physical network existing in reality into a plurality of virtual networks of different types on a logic level, and divides the virtual networks according to service requirements of different users by indexes such as time delay, bandwidth, reliability and the like, so that complex and changeable application scenes are dealt with. The network slice can be customized for different services or manufacturers, can realize the special and isolation of network resources, and can provide better services while meeting the requirements of different service scenes.

The network slice identifier defined in the current standard may be S-nsai, which is an end-to-end identifier, that is, a slice identifier that can be identified by the UE, the base station, and the core network device.

Fig. 3 is a schematic diagram of the structure of the S-NSSAI, as shown in fig. 3, wherein the S-NSSAI includes two parts, slice/Service Type (SST) and Slice differentiation (Slice Differentition, SD). Wherein SST is used to distinguish the scene type of the network slice application, and is located at the upper 8 bits of S-nsai, and SD is located at the lower 24 bits of S-nsai, and is used to distinguish different network slices more carefully below the SST level. For example, when SST is V2X, different vehicle enterprises are distinguished by SD.

Considering a scenario in which a UE may use multiple network slices, a combination of S-nsais is defined as nsais. Up to R16, NSSAI may be classified as configured NSSAI (Configured NSSAI), default configured NSSAI (Default Configured NSSAI), requested NSSAI (Request NSSAI), allowed NSSAI (Allowed NSSAI), suspended NSSAI (Pending NSSAI), rejected NSSAI (Rejected NSSAI). The S-nsai in the default configuration of nsais contains only standardized valued SSTs, which are parameters that all operators can recognize. In addition to the default configured NSSAI, the S-NSSAI included in other NSSAIs may include operator defined values for which they are applicable, requiring association with their applicable public land mobile network (Public Land Mobile Network, PLMN). The UE may use the nsai only under its associated PLMN.

Deployment of network slices the ultimate goal is to provide services to UEs. When the UE needs to transmit service Data in a network slice, the UE needs to register in the network slice first, and establish a path for transmitting service Data, i.e. a Packet Data Unit (PDU) session after receiving a permission from the network.

Fig. 4 is a schematic flow chart of a UE registering a network slice, as shown in fig. 4, the registration request includes the following steps:

step 1, the UE sends a registration request (Registration request) to the AMF according to the service, wherein the registration request comprises the requested S-NSSAI.

And 2, the AMF determines the allowed NSSAI according to the range of the UE subscription and the network slice deployment.

Step 3, the AMF sends a registration response (Registration accept) to the UE, where the registration response includes allowed nsais.

In addition, the AMF sends an N2 message to the base station RAN, and the N2 message also includes the allowed nsais. After receiving the registration response, the UE can establish a PDU session in the slice in the allowed nsai, and after the PDU session is established, the UE can send and receive data.

At network deployment, the coverage of each slice may be different, and the AMF needs to ensure that all slices in the allowed nsai can cover the registration area (Registration area, RA) that the AMF allocates to the UE (i.e. the registered TA list) when deciding on the allowed nsai. The AMF may obtain the S-nsai and corresponding Tracking Area (TA) supported by the base station from the base station through NG setup request or RAN configuration update signaling.

In 3GPP R17, an idle-state UE can select a cell capable of supporting the UE service by reading the slice information supported by the base station broadcast in the system message.

The UE accesses the network based on the network slice registration procedure, and as the UE location changes, the UE needs to perform cell reselection. At present, cells in RA of the UE support the same network slice, so that when the UE reselects cells in RA, the UE considers the signal quality of surrounding cells and also considers the network slice, which leads to waste of UE resources and electric quantity.

Aiming at the above scene, the application provides a cell reselection scheme, which aims to reduce unnecessary power consumption of UE in the cell reselection process. The inventive idea of the scheme is as follows: considering that when the UE performs cell reselection in the RA, the cells in the RA support the same network slice, the UE only needs to perform cell reselection based on the cell signal quality, and whether the network slice supported by the cells is considered does not influence the finally selected cells, so that further optimization of the UE cell reselection scheme is necessary.

The cell reselection scheme provided by the application relates to at least two cell reselection modes, wherein the first cell reselection mode is to conduct cell reselection based on signal quality of a cell, the second cell reselection mode is to conduct cell reselection based on network slicing and signal quality of the cell, a terminal can determine which cell reselection mode is adopted by judging whether to leave RA or not, the terminal can also determine which cell reselection mode is adopted by receiving an indication of a network side and judging whether to leave RA or not. In the scheme, the terminal considers the network slices supported by the surrounding cells in the cell reselection only when the terminal leaves or leaves the RA, so that the complexity in replacing the cells in the RA is reduced, and the power consumption of the terminal is reduced.

The technical scheme shown in the application is described in detail through specific embodiments. It should be noted that the following embodiments may exist alone or in combination with each other. For the same or similar matters, for example, explanation of terms or nouns, explanation of steps, etc., reference may be made to each other in different embodiments, and the explanation is not repeated.

Fig. 5 is a flow chart of a cell reselection method according to an embodiment of the present application. As shown in fig. 5, the method provided in this embodiment is applied to a terminal device, and specifically includes the following steps:

step 101, the terminal equipment determines a cell reselection mode.

In this embodiment, the cell reselection modes that may be used by the terminal device include a first cell reselection mode and a second cell reselection mode.

The first cell reselection mode is cell reselection based on the signal quality of a cell, that is, the terminal device performs cell reselection according to the signal quality of a searched cell (or surrounding cells), and if the signal quality of the searched cell is greater than or equal to a preset threshold, the terminal device selects the cell.

The second cell reselection mode is cell reselection based on network slices and signal quality of cells, that is, the terminal equipment needs to acquire not only the signal quality of the searched cells but also network slices supported by the searched cells, and if the network slices supported by the searched cells are consistent with the slices (intra slices) intended by the terminal equipment, and the signal quality of the searched cells is greater than or equal to a preset threshold, the terminal equipment selects the cells. The linked slice may be an allowed nsai, a requested nsai, or a network slice used by the PDU session already established.

It should be noted that, the cell reselection modes that the terminal device can use are not limited to the two cell reselection modes described above, but may be other cell reselection modes. For example, the terminal device determines the frequency band to be used, and searches only for a cell supporting the desired network slice and having a signal quality greater than or equal to a preset threshold value on the frequency band. Or when the terminal equipment can search for the system messages of a plurality of cells, the terminal equipment preferentially selects the cells of the TAI in the RA, and if no cells of the TAI in the RA exist, the terminal equipment selects the cells which support the desired network slice and have the signal quality larger than or equal to a preset threshold value.

In one embodiment of the present application, the determining, by the terminal device, a cell reselection mode includes: the access layer of the terminal device determines the cell reselection mode. Specifically, the access layer of the terminal device determines a cell reselection mode according to whether the terminal device is to leave the registration area RA of the terminal device.

In one embodiment of the present application, the determining, by the terminal device, a cell reselection mode includes: the non-access layer of the terminal equipment determines a first result, the first result is used for indicating whether the terminal equipment leaves the RA of the terminal equipment, the non-access layer of the terminal equipment sends the first result to the access layer of the terminal equipment, and the access layer of the terminal equipment determines a cell reselection mode according to the first result.

In the above two embodiments, whether the terminal device is about to leave the RA of the terminal device may be understood as a system message that the terminal device is leaving the current cell and searches for a neighboring cell, and if the TAI in the searched system message is not within the RA, the terminal device is considered to leave the RA.

Alternatively, the access layer of the terminal device may be a radio resource control (Radio Resource Control, RRC) layer.

Step 102, the terminal equipment performs cell reselection according to the determined cell reselection mode.

The cell reselection mode determined by the terminal equipment through the steps comprises the first cell reselection mode or the second cell reselection mode.

According to the cell reselection method provided by the embodiment, the terminal equipment determines a cell reselection mode according to whether the terminal equipment is out of the terminal equipment registration area RA currently. If the terminal device is about to leave or has left the RA, the terminal device needs to reselect the cell based on the network slice and signal quality of the cell; if the terminal device is within the RA, the terminal device need only perform cell reselection based on the signal quality of the cell. By the method, the terminal equipment considers the network slices supported by the surrounding cells in the cell reselection only when the terminal equipment leaves or has left the RA, so that the complexity in replacing the cells in the RA is reduced, and the power consumption of the terminal equipment is reduced.

Based on the above embodiments, a detailed description will be given below of how the terminal determines the cell reselection mode in conjunction with two specific embodiments.

Fig. 6 is a schematic diagram of interaction of determining a cell reselection mode by a terminal device according to an embodiment of the present application, as shown in fig. 6, where the method provided by the embodiment relates to interaction between an access layer and a non-access layer in the terminal device, and specifically includes the following steps:

step 201, a non-access layer of a terminal device sends a registration area RA of the terminal device to an access layer of the terminal device.

In this embodiment, the non-access stratum of the terminal device may obtain the RA of the terminal device from the AMF network element.

Optionally, the non-access layer of the terminal device may also carry an intra-layer while sending the RA of the terminal device to the access layer of the terminal device. When determining to use the second cell reselection mode to reselect the cell, the access layer of the terminal equipment needs to combine with the inter slice to reselect the cell.

The access layer of the terminal device stores the RA of the terminal device and the intra slice (if received) for subsequent step determination and cell reselection.

Step 202, the access layer of the terminal device determines a first result according to the TAI in the system message of the searched cell and the RA of the terminal device, where the first result is used to indicate whether the searched cell is in the RA.

The access layer of the terminal device reads the system message of the surrounding cells each time the cells are replaced, and the system message comprises tracking area identification (Tracking Area Identity, TAI). A Tracking Area (TA) is a configuration at a cell level, a plurality of cells can configure the same TA, and one cell can belong to only one TA.

Specifically, the access layer of the terminal device determines the first result by determining whether the TAI in the system message of the searched cell is within the RA of the terminal device. If the TAI is in the RA of the terminal equipment, the first result is used for indicating that the searched cell is in the RA; if the TAI is outside the RA of the terminal device, the first result is used to indicate that the searched cell is not within the RA.

Step 203, the access layer of the terminal equipment determines a cell reselection mode according to the first result.

Specifically, if the first result is used for indicating that the searched cell is in the RA, the access layer of the terminal equipment determines to adopt a first cell reselection mode; if the first result is used for indicating that the searched cell is not in the RA, the access layer of the terminal equipment determines to adopt a second cell reselection mode.

Further, the access layer of the terminal device performs cell reselection by adopting a second cell reselection mode, including: the access layer of the terminal equipment determines whether the searched cell supports the network slice (intra slice) desired by the UE, and if the searched cell supports the intra slice and the signal quality of the searched cell is greater than or equal to a preset threshold, the access layer of the terminal equipment selects the cell. It should be noted that, if the step 201 does not carry the intra-layer, the access layer of the terminal device needs to send a request to the non-access layer of the terminal device to obtain the intra-layer.

The access layer of the terminal device determines whether the terminal device is currently outside the terminal device registration area RA, and determines a cell reselection mode. By the method, the terminal equipment considers the network slices supported by the surrounding cells in the cell reselection only when the terminal equipment leaves or has left the RA, so that the complexity in replacing the cells in the RA is reduced, and the power consumption of the terminal equipment is reduced.

Fig. 7 is a second interaction diagram of determining a cell reselection mode by a terminal device according to an embodiment of the present application. As shown in fig. 7, the method provided in this embodiment relates to interaction between an access layer and a non-access layer in a terminal device, and specifically includes the following steps:

step 301, the access layer of the terminal device sends the TAI in the system message of the searched cell to the non-access layer of the terminal device.

In this embodiment, the access layer of the terminal device reads the system message of the surrounding cell each time the cell is replaced, the system message includes the TAI, and sends the TAI obtained from the system message to the non-access layer of the terminal device, so that the non-access layer performs step 302.

Step 302, the non-access layer of the terminal device determines a first result according to the TAI and the registration area RA of the terminal device, where the first result is used to indicate whether the searched cell is in the RA.

Similar to step 202 of the above embodiment, the non-access stratum of the terminal device determines the first result by determining if the TAI is within the RA of the terminal device. If the TAI is in the RA of the terminal equipment, the first result is used for indicating that the searched cell is in the RA; if the TAI is outside the RA of the terminal device, the first result is used to indicate that the searched cell is not within the RA.

Step 303, the non-access layer of the terminal device sends a first result to the access layer of the terminal device.

Step 304, the access layer of the terminal equipment determines a cell reselection mode according to the first result.

Step 304 of the present embodiment is the same as step 203 of the above embodiment, and specifically, reference may be made to the above embodiment, which is not repeated here.

The difference between the cell reselection method provided in this embodiment and the embodiment shown in fig. 6 is that: the non-access layer of the terminal equipment determines whether the terminal equipment is currently out of the terminal equipment registration area RA, and sends the determined result to the access layer of the terminal equipment so that the access layer determines a cell reselection mode according to the result. By the method, the terminal equipment considers the network slices supported by the surrounding cells in the cell reselection only when the terminal equipment leaves or has left the RA, so that the complexity in replacing the cells in the RA is reduced, and the power consumption of the terminal equipment is reduced.

In addition to the above embodiments, the embodiments of the present application further provide a cell reselection method, where the method involves interaction between a terminal device and a network device, where the terminal device determines a cell reselection mode through information sent by the network device, and performs cell reselection based on the determined cell reselection mode.

Fig. 8 is an interaction schematic diagram of a cell reselection method provided in an embodiment of the present application. As shown in fig. 8, the method provided in this embodiment relates to interaction between a terminal device and a network device, where the network device may be an AMF network element, and specifically includes the following steps:

step 401, the network device determines first information, where the first information includes at least first indication information, where the first indication information is used to indicate a cell reselection mode used by the terminal device.

The cell reselection mode indicated by the first indication information includes at least one of a first cell reselection mode and a second cell reselection mode, that is, the first indication information indicates whether the terminal equipment can use the first cell reselection mode and/or the second cell reselection mode.

Optionally, in some embodiments, the first information further includes: the second indication information is used for indicating an application area of the cell reselection mode, and the application area of the cell reselection mode comprises an application area of the first cell reselection mode and/or an application area of the second cell reselection mode. The applicable area of the cell reselection mode may be configured by the network.

The applicable area of the cell reselection mode can be understood as a range to which the cell reselection mode is applicable. For example, the second cell reselection mode may be applied to the entire PLMN, NR cells or E-UTRAN cells within the PLMN, RA or NR cells or E-UTRAN cells within RA.

Optionally, in some embodiments, the first information further includes: registration area RA of the terminal device.

Optionally, in some embodiments, the first information further includes: the allowed NSSAI of the terminal device.

In this embodiment, the network device determines first information, including: the network equipment determines the first information according to the position of the terminal equipment and/or the subscription information of the terminal equipment. The subscription information of the terminal device includes a network slice (subsai) of the subscription of the terminal device.

In one embodiment of the present application, the network device determines an allowable nsai of the terminal device in the first information, specifically includes: after the AMF network element receives the registration request carrying the NSSAI of the request sent by the terminal device, the AMF network element first authenticates the terminal device, and if the terminal device passes the authentication, obtains slice selection subscription data (Slice Selection Subscription Data) (i.e. subscription information) of the terminal device from the UDM. The AMF network element combines the network slice subscribed by the terminal equipment in the subscription information and the requested NSSAI to determine the allowable NSSAI of the terminal equipment.

Step 402, the network device sends first information to the terminal device.

In one embodiment of the present application, the first information is carried in a non-access message.

In one embodiment of the present application, the first information is carried in a network slice registration accept (Registration Accept) message.

Step 403, the terminal device determines a cell reselection mode according to the first information.

Step 404, the terminal device performs cell reselection according to the determined cell reselection mode.

Fig. 9 is an interaction diagram three of determining a cell reselection mode by a terminal device according to an embodiment of the present application, where, as shown in fig. 9, the terminal device determines the cell reselection mode, and includes the following steps:

step 501, a non-access layer of a terminal device receives first information from a network device.

Step 502, the non-access layer of the terminal device sends the RA of the terminal device to the access layer of the terminal device according to the first information.

In one embodiment of the present application, when determining that the terminal device is located in the applicable area of the second cell reselection mode indicated by the second indication information in the first information, the non-access layer of the terminal device sends an RA to the access layer of the terminal device.

In step 503, the access layer of the terminal device determines a first result according to the tracking area identifier TAI in the system message of the searched cell and the RA of the terminal device, where the first result is used to indicate whether the searched cell is in the RA of the terminal device.

Step 504, the access layer of the terminal equipment determines a cell reselection mode according to the first result.

Step 503 and step 504 of this embodiment are the same as step 202 and step 203 of the above embodiment, and specifically, refer to the above embodiment, and are not described herein again.

As can be seen from the above embodiment, unlike the embodiment shown in fig. 6, the non-access layer of the terminal device triggers the location analysis of the access layer of the terminal device on the terminal device when determining that the terminal device is located in the applicable area of the second cell reselection mode indicated by the second indication information in the first information, if the terminal device is in its registration area RA, the access layer determines to use the first cell reselection mode, and if the terminal device is not in its RA, the access layer determines to use the second cell reselection mode. Through the above process, the complexity of changing cells in RA by the terminal equipment is reduced.

Fig. 10 is an interaction diagram four of determining a cell reselection mode by a terminal device according to an embodiment of the present application, where, as shown in fig. 10, the terminal device determines the cell reselection mode, and includes the following steps:

step 601, a non-access stratum of a terminal device receives first information from a network device.

Step 602, the access layer of the terminal device sends the TAI in the system message of the searched cell to the non-access layer of the terminal device.

In this embodiment, the access layer of the terminal device reports the TAI obtained in the system message of the searched cell to the non-access layer of the terminal device each time the cell is reselected.

Step 603, the non-access layer of the terminal device determines a first result according to the TAI in the system message of the searched cell and the first information, where the first result is used to indicate whether the searched cell is in the RA of the terminal device.

Step 604, the non-access layer of the terminal device sends a first result to the access layer of the terminal device.

In one embodiment of the present application, when determining that the terminal device is located in an applicable area of the second cell reselection mode indicated by the second indication information in the first information, the non-access layer of the terminal device determines a first result according to the TAI in the system message of the searched cell, and sends the first result to the access layer of the terminal device. Specifically, the non-access layer of the terminal device determines the first result according to the TAI in the system message of the searched cell and the RA of the terminal device.

Step 605, the access layer of the terminal device determines a cell reselection mode according to the first result.

Steps 603 to 605 of the present embodiment are the same as steps 302 to 304 of the above embodiment, and specifically, refer to the above embodiment, and are not repeated here.

As is clear from the above-mentioned embodiment, unlike the embodiment shown in fig. 7, the non-access layer of the terminal device performs the location analysis of the terminal device only when it is determined that the terminal device is located in the applicable area of the second cell reselection mode indicated by the second indication information in the first information, and sends the location determination result to the access layer, if the determination result indicates that the terminal device is in its registration area RA, the access layer determines to use the first cell reselection mode, and if the determination result indicates that the terminal device is not in its RA, the access layer determines to use the second cell reselection mode. Through the above process, the complexity of changing cells in RA by the terminal equipment is reduced.

According to the cell reselection method provided by the embodiment, the terminal equipment receives first information sent by the network equipment, wherein the first information at least comprises first indication information and second indication information, the first indication information is used for indicating a cell reselection mode which can be used by the terminal equipment, and the second indication information is used for indicating an application range of the cell reselection mode. When the terminal device determines that the terminal device is within the application range of the second cell reselection mode indicated by the second indication information, it may further determine whether the terminal device is in the registration area RA, thereby determining whether the cell reselection is required to be performed by using the second cell reselection mode. It can be understood that if the terminal is not in the application range of the second cell reselection mode indicated by the second indication information, the terminal device directly uses the first cell reselection mode to perform cell reselection, thereby reducing the complexity when the terminal device changes cells and reducing the power consumption of the terminal device.

The cell reselection method provided by the embodiment of the present application is described in detail above, and the terminal device and the network device provided by the embodiment of the present application will be described below.

Fig. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 11, a terminal device 700 provided in an embodiment of the present application includes: a processing module 701.

A processing module 701, configured to determine a cell reselection mode;

and carrying out cell reselection according to the determined cell reselection mode.

Optionally, the cell reselection mode determined by the processing module 701 includes: a first cell reselection mode or a second cell reselection mode;

the first cell reselection mode is cell reselection based on signal quality of a cell, and the second cell reselection mode is cell reselection based on network slicing of the cell and signal quality.

In one embodiment of the present application, the processing module 701 is specifically configured to:

transmitting a registration area RA of the terminal equipment to an access layer in a non-access layer;

determining a first result at the access layer according to tracking area identification TAI and the RA in the system message of the searched cell, wherein the first result is used for indicating whether the searched cell is in the RA;

And determining a cell reselection mode at the access layer according to the first result.

receiving, at a non-access stratum, a TAI in a system message from a searched cell of the access stratum;

determining, at the non-access stratum, a first result according to the TAI and an RA of the terminal device, where the first result is used to indicate whether the searched cell is in the RA;

transmitting the first result to the access layer at the non-access layer;

Optionally, the apparatus further comprises: a receiving module 702;

in one embodiment of the present application, the receiving module 702 is configured to receive first information from a network device, where the first information includes at least first indication information, where the first indication information is used to indicate a cell reselection mode used by the terminal device;

the processing module 701 is specifically configured to determine a cell reselection mode according to the first information.

In one embodiment of the present application, the receiving module 702 is specifically configured to:

first information from the network device is received at a non-access stratum.

Optionally, the first information further includes: and the second indication information is used for indicating the applicable area of the cell reselection mode.

Optionally, the first information further includes: RA of the terminal device.

sending RA of the terminal equipment to an access layer according to the first information in a non-access layer;

determining a first result at the access layer according to tracking area identification TAI in a system message of the searched cell and the RA, wherein the first result is used for indicating whether the searched cell is in the RA;

and when the non-access layer determines that the terminal equipment is positioned in the applicable area of the second cell reselection mode indicated by the second indication information in the first information, the non-access layer sends the RA to the access layer.

Determining, at the non-access stratum, a first result according to the TAI in the system message of the searched cell and the first information, where the first result is used to indicate whether the searched cell is in the RA of the terminal device;

transmitting the first result to the access layer at the non-access layer;

and when the non-access layer determines that the terminal equipment is positioned in the applicable area of the second cell reselection mode indicated by the second indication information in the first information, determining a first result according to the TAI in the system message of the searched cell.

Optionally, the first information is carried in a NAS message.

Optionally, the first information is carried in a network slice registration accept (Registration Accept) message.

if the first result indicates that the searched cell is in the RA, determining to use the first cell reselection mode in the access layer; or alternatively

And if the first result indicates that the searched cell is not in the RA, determining to use the second cell reselection mode in the access layer.

The terminal device provided in the embodiment of the present application is configured to execute the technical scheme executed by the terminal device in any of the foregoing method embodiments, and its implementation principle and technical effect are similar, and are not described herein again.

Fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in fig. 12, a network device 800 provided in an embodiment of the present application includes: processing module 801 and transmitting module 802.

A processing module 801, configured to determine first information, where the first information includes at least first indication information, where the first indication information is used to indicate a cell reselection mode used by a terminal device;

a sending module 802, configured to send the first information to the terminal device.

Optionally, the cell reselection mode used by the terminal device indicated by the first indication information includes: at least one of a first cell reselection mode and a second cell reselection mode;

Optionally, the first information further includes: the registration area RA of the terminal device.

In one embodiment of the present application, the processing module 801 is specifically configured to:

and determining the first information according to the position of the terminal equipment and/or the subscription information of the terminal equipment.

Optionally, the first information is carried in a NAS message.

The network device provided in the embodiment of the present application is configured to execute the technical scheme executed by the network device in the embodiment shown in fig. 8, and its implementation principle and technical effect are similar, and are not described herein again.

It should be noted that, the above division of the modules of the terminal device or the network device is merely a division of a logic function, and may be fully or partially integrated into a physical entity or may be physically separated. And these modules may all be implemented in software in the form of calls by the processing element; or can be realized in hardware; the method can also be realized in a form of calling software by a processing element, and the method can be realized in a form of hardware by a part of modules. For example, the processing module may be a processing element that is set up separately, may be implemented in a chip of the above apparatus, or may be stored in a memory of the above apparatus in the form of program code, and may be called by a processing element of the above apparatus to execute the functions of the above determination module. The implementation of the other modules is similar. In addition, all or part of the modules can be integrated together or can be independently implemented. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in a software form.

For example, the modules above may be one or more integrated circuits configured to implement the methods above, such as: one or more specific integrated circuits (application specific integrated circuit, ASIC), or one or more microprocessors (digital signal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA), or the like. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general purpose processor, such as a central processing unit (central processing unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.

Fig. 13 is a schematic hardware structure of a terminal device according to an embodiment of the present application. As shown in fig. 13, the terminal device 900 of the present embodiment may include: a processor 901, a memory 902, and a communication interface 903. Wherein the memory 902 is configured to store a computer program; a processor 901, configured to execute a computer program stored in the memory 902, so as to implement a method executed by the terminal device in any one of the method embodiments. A communication interface 903 for communicating data or signals with a network device or other devices.

Alternatively, the memory 902 may be separate or integrated with the processor 901. When the memory 902 is a device independent from the processor 901, the terminal device 900 may further include: a bus 904 for connecting the memory 902 and the processor 901.

The terminal device provided in this embodiment may be used to execute the method executed by the terminal device in any of the above method embodiments, and its implementation principle and technical effects are similar, and are not repeated here.

The embodiment of the application also provides a network device, which may be an AMF network element. Fig. 14 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in fig. 14, the network device 1000 of the present embodiment includes:

A processor 1001, a memory 1002, and a communication interface 1003. Wherein the memory 1002 is for storing a computer program; a processor 1001 for executing computer programs stored in a memory 1002 to implement the method performed by the network device in any of the method embodiments described above. Communication interface 1003 is used for data communication or signal communication with a terminal device or other devices.

Alternatively, the memory 1002 may be separate or integrated with the processor 1001. When the memory 1002 is a device separate from the processor 1001, the network apparatus 1000 may further include: a bus 1004 for connecting the memory 1002 and the processor 1001.

The network device provided in this embodiment may be used to execute the method executed by the network device in the embodiment shown in fig. 8, and its implementation principle and technical effects are similar, and are not repeated here.

The embodiment of the application also provides a computer readable storage medium, wherein computer executable instructions are stored in the computer readable storage medium, and when the computer executable instructions are executed by a processor, the computer executable instructions are used for realizing the technical scheme of the terminal equipment in any method embodiment.

The embodiment of the application also provides a computer readable storage medium, wherein computer executable instructions are stored in the computer readable storage medium, and when the computer executable instructions are executed by a processor, the computer executable instructions are used for realizing the technical scheme of the network device in any method embodiment.

The embodiment of the application also provides a program, when the program is executed by a processor, for executing the technical scheme of the terminal device in any of the foregoing method embodiments.

The embodiment of the application also provides a program, when the program is executed by a processor, for executing the technical scheme of the network device in any of the foregoing method embodiments.

The embodiment of the application also provides a computer program product, which comprises program instructions for implementing the technical scheme of the terminal device in any of the foregoing method embodiments.

The embodiment of the application also provides a computer program product, which comprises program instructions for implementing the technical scheme of the network device in any of the foregoing method embodiments.

The embodiment of the application also provides a chip, which comprises: the processing module and the communication interface, the processing module can execute the technical scheme of the terminal equipment in the foregoing method embodiment. Further, the chip also comprises a storage module (such as a memory), the storage module is used for storing instructions, the processing module is used for executing the instructions stored in the storage module, and execution of the instructions stored in the storage module enables the processing module to execute the technical scheme of the terminal equipment.

The embodiment of the application also provides a chip, which comprises: the processing module and the communication interface, the processing module can execute the technical scheme of the network equipment in the foregoing method embodiment. Further, the chip further includes a storage module (e.g., a memory), the storage module is configured to store the instructions, the processing module is configured to execute the instructions stored in the storage module, and execution of the instructions stored in the storage module causes the processing module to execute the technical scheme of the network device.

In the present application, "at least two" means two or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the front and rear associated objects are an "or" relationship; in the formula, the character "/" indicates that the front and rear associated objects are a "division" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application.

It should be understood that, in the embodiments of the present application, the sequence number of each process described above does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

A method of cell reselection, comprising:

the terminal equipment determines a cell reselection mode;

and the terminal equipment performs cell reselection according to the determined cell reselection mode.
The method according to claim 1, wherein the cell reselection mode determined by the terminal device comprises: a first cell reselection mode or a second cell reselection mode;

the first cell reselection mode is cell reselection based on signal quality of a cell, and the second cell reselection mode is cell reselection based on network slicing of the cell and signal quality.
A method according to claim 1 or 2, characterized in that the terminal device determines a cell reselection mode comprising:

The non-access layer of the terminal equipment sends a registration area RA of the terminal equipment to the access layer of the terminal equipment;

the access layer determines a first result according to tracking area identification TAI in the system message of the searched cell and the RA, wherein the first result is used for indicating whether the searched cell is in the RA;

and the access layer determines a cell reselection mode according to the first result.
A method according to claim 1 or 2, characterized in that the terminal device determines a cell reselection mode comprising:

the non-access layer of the terminal equipment receives TAI in the system message of the searched cell from the access layer of the terminal equipment;

the non-access layer determines a first result according to the TAI and RA of the terminal equipment, wherein the first result is used for indicating whether the searched cell is in the RA;

the non-access layer sends the first result to the access layer;

and the access layer determines a cell reselection mode according to the first result.
The method according to claim 1 or 2, characterized in that before the terminal device determines the cell reselection mode, the method further comprises:

The terminal equipment receives first information from network equipment, wherein the first information at least comprises first indication information, and the first indication information is used for indicating a cell reselection mode used by the terminal equipment;

the method for determining the cell reselection mode by the terminal equipment comprises the following steps:

and the terminal equipment determines a cell reselection mode according to the first information.
The method of claim 5, wherein the terminal device receives the first information from the network device, comprising:

the non-access stratum of the terminal device receives first information from the network device.
The method of claim 5 or 6, wherein the first information further comprises: and the second indication information is used for indicating the applicable area of the cell reselection mode.
The method of any of claims 5-7, wherein the first information further comprises: RA of the terminal device.
The method according to any of claims 6-8, wherein the terminal device determining a cell reselection mode according to the first information comprises:

the non-access layer of the terminal equipment sends RA of the terminal equipment to the access layer of the terminal equipment according to the first information;

The access layer determines a first result according to tracking area identification TAI in the system message of the searched cell and the RA, wherein the first result is used for indicating whether the searched cell is in the RA;

and the access layer determines a cell reselection mode according to the first result.
The method according to claim 9, wherein the non-access stratum of the terminal device sends the RA of the terminal device to the access stratum of the terminal device according to the first information, comprising:

and when the non-access layer of the terminal equipment determines that the terminal equipment is positioned in the applicable area of the second cell reselection mode indicated by the second indication information in the first information, sending the RA to the access layer.
The method according to any of claims 6-8, wherein the terminal device determining a cell reselection mode according to the first information comprises:

the non-access layer of the terminal equipment receives TAI in the system message of the searched cell from the access layer of the terminal equipment;

the non-access layer determines a first result according to the TAI in the system message of the searched cell and the first information, wherein the first result is used for indicating whether the searched cell is in RA of the terminal equipment;

The non-access layer sends the first result to the access layer;

and the access layer determines a cell reselection mode according to the first result.
The method of claim 11, wherein the non-access stratum of the terminal device determining a first result from the TAI in the system message of the searched cell and the first information comprises:

and when the non-access layer of the terminal equipment determines that the terminal equipment is positioned in the applicable area of the second cell reselection mode indicated by the second indication information in the first information, determining a first result according to the TAI in the system message of the searched cell.
The method according to any of claims 5-12, wherein the first information is carried in a NAS message.
The method of claim 13, wherein the first information is carried in a network slice registration accept (Registration Accept) message.
The method according to any of claims 3, 4, 9-12, wherein the determining, by the access layer of the terminal device, a cell reselection mode according to the first result comprises:

if the first result indicates that the searched cell is in the RA, the access layer of the terminal equipment determines to use the first cell reselection mode; or alternatively

And if the first result indicates that the searched cell is not in the RA, the access layer of the terminal equipment determines to use the second cell reselection mode.
A method of cell reselection, comprising:

the network equipment determines first information, wherein the first information at least comprises first indication information, and the first indication information is used for indicating a cell reselection mode used by the terminal equipment;

the network device sends the first information to the terminal device.
The method according to claim 16, wherein the cell reselection mode used by the terminal device indicated by the first indication information includes: at least one of a first cell reselection mode and a second cell reselection mode;

the first cell reselection mode is cell reselection based on signal quality of a cell, and the second cell reselection mode is cell reselection based on network slicing of the cell and signal quality.
The method of claim 16 or 17, wherein the first information further comprises: and the second indication information is used for indicating the applicable area of the cell reselection mode.
The method of any one of claims 16-18, wherein the first information further comprises: the registration area RA of the terminal device.
The method according to any of claims 16-19, wherein the network device determining the first information comprises:

the network equipment determines the first information according to the position of the terminal equipment and/or the subscription information of the terminal equipment.
The method according to any of claims 16-20, wherein the first information is carried in a NAS message.
The method of claim 21, wherein the first information is carried in a network slice registration accept (Registration Accept) message.
A terminal device, comprising:

the processing module is used for determining a cell reselection mode;

and carrying out cell reselection according to the determined cell reselection mode.
The apparatus of claim 23, wherein the determined cell reselection mode comprises: a first cell reselection mode or a second cell reselection mode;

the first cell reselection mode is cell reselection based on signal quality of a cell, and the second cell reselection mode is cell reselection based on network slicing of the cell and signal quality.
The apparatus according to claim 23 or 24, characterized in that the processing module is specifically configured to:

Transmitting a registration area RA of the terminal equipment to an access layer in a non-access layer;

determining a first result at the access layer according to tracking area identification TAI in a system message of the searched cell and the RA, wherein the first result is used for indicating whether the searched cell is in the RA;

and determining a cell reselection mode at the access layer according to the first result.
The apparatus according to claim 23 or 24, characterized in that the processing module is specifically configured to:

receiving, at a non-access stratum, a TAI in a system message from a searched cell of the access stratum;

determining, at the non-access stratum, a first result according to the TAI and an RA of the terminal device, where the first result is used to indicate whether the searched cell is in the RA;

transmitting the first result to the access layer at the non-access layer;

and determining a cell reselection mode at the access layer according to the first result.
The apparatus according to claim 23 or 24, characterized in that the apparatus further comprises: a receiving module; the receiving module is configured to receive first information from a network device, where the first information includes at least first indication information, where the first indication information is used to indicate a cell reselection mode used by the terminal device;

The processing module is specifically configured to determine a cell reselection mode according to the first information.
The apparatus according to claim 27, wherein the receiving module is specifically configured to:

first information from the network device is received at a non-access stratum.
The apparatus according to claim 27 or 28, wherein the first information further comprises: and the second indication information is used for indicating the applicable area of the cell reselection mode.
The apparatus of any one of claims 27-29, wherein the first information further comprises: RA of the terminal device.
The apparatus according to any one of claims 28-30, characterized in that the processing module is specifically configured to:

sending RA of the terminal equipment to an access layer according to the first information in a non-access layer;

determining a first result at the access layer according to tracking area identification TAI in a system message of the searched cell and the RA, wherein the first result is used for indicating whether the searched cell is in the RA;

and determining a cell reselection mode at the access layer according to the first result.
The apparatus according to claim 31, characterized in that said processing module is in particular configured to:

And when the non-access layer determines that the terminal equipment is positioned in the applicable area of the second cell reselection mode indicated by the second indication information in the first information, the non-access layer sends the RA to the access layer.
The apparatus according to any one of claims 28-30, characterized in that the processing module is specifically configured to:

receiving, at a non-access stratum, a TAI in a system message from a searched cell of the access stratum;

determining, at the non-access stratum, a first result according to the TAI in the system message of the searched cell and the first information, where the first result is used to indicate whether the searched cell is in the RA of the terminal device;

transmitting the first result to the access layer at the non-access layer;

and determining a cell reselection mode at the access layer according to the first result.
The apparatus according to claim 33, characterized in that said processing module is in particular configured to:

and when the non-access layer determines that the terminal equipment is positioned in the applicable area of the second cell reselection mode indicated by the second indication information in the first information, determining a first result according to the TAI in the system message of the searched cell.
The apparatus according to any of claims 27-34, wherein the first information is carried in a NAS message.
The apparatus of claim 35, wherein the first information is carried in a network slice registration accept (Registration Accept) message.
The apparatus according to any one of claims 25, 26, 31-34, characterized in that the processing module is specifically configured to:

if the first result indicates that the searched cell is in the RA, determining to use the first cell reselection mode in the access layer; or alternatively

And if the first result indicates that the searched cell is not in the RA, determining to use the second cell reselection mode in the access layer.
A network device, comprising:

the processing module is used for determining first information, wherein the first information at least comprises first indication information, and the first indication information is used for indicating a cell reselection mode used by the terminal equipment;

and the sending module is used for sending the first information to the terminal equipment.
The apparatus according to claim 38, wherein the cell reselection mode used by the terminal apparatus indicated by the first indication information includes: at least one of a first cell reselection mode and a second cell reselection mode;

The first cell reselection mode is cell reselection based on signal quality of a cell, and the second cell reselection mode is cell reselection based on network slicing of the cell and signal quality.
The apparatus of claim 38 or 39, wherein the first information further comprises: and the second indication information is used for indicating the applicable area of the cell reselection mode.
The device of any one of claims 38-40, wherein the first information further comprises: the registration area RA of the terminal device.
The apparatus according to any one of claims 38 to 41, wherein the processing module is specifically configured to:

and determining the first information according to the position of the terminal equipment and/or the subscription information of the terminal equipment.
The apparatus of any of claims 38-42, wherein the first information is carried in a NAS message.
The apparatus of claim 43, wherein the first information is carried in a network slice registration accept (Registration Accept) message.
A terminal device, comprising: a memory for storing a computer program and a processor for calling and running the computer program from the memory, such that the processor runs the computer program to perform the method of any of claims 1-15.
A network device, comprising: a memory for storing a computer program and a processor for calling and running the computer program from the memory, such that the processor runs the computer program to perform the method of any of claims 16-22.
A computer storage medium storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1-15.
A computer storage medium storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 16-22.
A computer program product, characterized in that the computer program product, when run on a computer, causes the computer to perform the method according to any of claims 1-15.
A computer program product, characterized in that the computer program product, when run on a computer, causes the computer to perform the method according to any of claims 16-22.