Wireless communication method and device

Abstract

The embodiment of the present application provides a wireless communication method and device, which can reasonably select a cell, avoid the problem of being unable to communicate due to improper cell selection, and support more flexible communication scenarios. The method includes: selecting a first cell according to the first core network type to be connected, the first cell is a cell that supports the first core network type; and accessing the cell through the first cell.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a wireless communication method and device. Background Art

[0002] In a Long Term Evolution system, a terminal device may first select a Public Land Mobile Network (PLMN), and then select a cell to be accessed from cells within the PLMN to access the cell.

[0003] With the development of communication, the requirements for communication flexibility are getting higher and higher.

[0004] How to match higher communication flexibility with respect to cell access is an issue that needs to be addressed urgently. Summary of the invention

[0005] The embodiments of the present application provide a wireless communication method and device, which can reasonably select a cell, avoid the problem of being unable to communicate due to improper cell selection, and support more flexible communication scenarios.

[0006] In a first aspect, a wireless communication method is provided, comprising:

[0007] Selecting a first cell according to a first core network type to be connected, where the first cell is a cell that supports the first core network type;

[0008] Cell access is performed through the first cell.

[0009] Therefore, in an embodiment of the present application, the terminal device selects a first cell according to the first core network type to be connected, and the first cell is a cell that supports the first core network type; through the first cell, cell access is performed, and a cell that supports the required core network type can be selected. The cell selection can be reasonably performed to avoid the problem of inability to communicate due to improper cell selection, and more flexible communication scenarios can be supported. For example, a cell can support multiple core network types.

[0010] In combination with the first aspect, in a possible implementation manner of the first aspect, before selecting the first cell according to the type of the first core network to be connected as needed, the method further includes:

[0011] At the non-access layer NAS layer, according to the service type of the service that needs to be processed, it is determined that the type of the core network to be connected is the first core network type.

[0012] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, selecting the first cell according to the type of the first core network that needs to be connected includes:

[0013] At the NAS layer, determine and indicate to the AS layer the first public land mobile network PLMN and / or the first radio access technology RAT selected for access;

[0014] At the access AS layer, the first cell is selected from the cells corresponding to the first PLMN and / or the first RAT searched out according to the core network type supported by the cell corresponding to the first PLMN and / or the first RAT searched out, and the first core network type.

[0015] In combination with the first aspect or any of the foregoing possible implementations, in another possible implementation of the first aspect, the method further includes:

[0016] At the AS layer, the core network type supported by the searched cell is obtained from the system information of the searched cell, and the obtained information is passed to the NAS layer.

[0017] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, selecting the first cell according to the type of the first core network that needs to be connected includes:

[0018] At the NAS layer, according to the first core network type, selecting and indicating to the AS layer a second PLMN capable of supporting the first core network type;

[0019] At the AS layer, the first cell is selected from the cells corresponding to the second PLMN that are searched.

[0020] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, the selecting, at the AS layer, the first cell from the cells corresponding to the searched second PLMN includes:

[0021] At the AS layer, the first cell is selected from the cells corresponding to the second PLMN that are searched for, according to the core network type supported by the cell corresponding to the second PLMN that is searched for, and the first core network type.

[0022] In combination with the first aspect or any of the foregoing possible implementations, in another possible implementation of the first aspect, the method further includes:

[0023] At the AS layer, the core network type supported by the searched cell is obtained from the system information of the searched cell, and the obtained information is passed to the NAS layer.

[0024] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, the selecting, at the NAS layer, according to the first core network type, and indicating to the AS layer a second PLMN that can support the first core network type includes:

[0025] At the NAS layer, according to the PLMN list, the second PLMN is selected and indicated to the AS layer, wherein the PLMN list indicates the core network type supported by each PLMN.

[0026] In combination with the first aspect or any of the foregoing possible implementations, in another possible implementation of the first aspect, the method further includes:

[0027] At the AS layer, a cell search is performed to determine the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN, and the searched information is passed to the NAS layer;

[0028] At the NAS layer, the PLMN list is generated according to the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN.

[0029] In combination with the first aspect or any of the foregoing possible implementations, in another possible implementation of the first aspect, the method further includes:

[0030] At the AS layer, the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN are obtained from the system information of the searched cell.

[0031] In combination with the first aspect or any one of the above possible implementations, in another possible implementation of the first aspect, the first type includes an evolved packet core network EPC and / or a 5G core network 5GC.

[0032] In a second aspect, a terminal device is provided, which is used to execute the method in the first aspect or any possible implementation of the first aspect. Specifically, the terminal device includes a functional module for executing the method in the first aspect or any possible implementation of the first aspect.

[0033] In a third aspect, a terminal device is provided, comprising a processor, a memory, and a transceiver. The processor, the memory, and the transceiver communicate with each other through an internal connection path to transmit control and / or data signals, so that the terminal device executes the method in the first aspect or any possible implementation of the first aspect.

[0034] In a fourth aspect, a computer-readable medium is provided for storing a computer program, wherein the computer program includes instructions for executing any one of the above methods or any possible implementations.

[0035] In a fifth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute any one of the above methods or any possible implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 It is a schematic flowchart of a wireless communication method according to an embodiment of the present application.

[0038] Figure 2 It is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0039] Figure 3 is a schematic block diagram of a system chip according to an embodiment of the present application.

[0040] Figure 4 It is a schematic block diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution ("LTE") system, LTE Frequency Division Duplex ("FDD") system, LTE Time Division Duplex ("TDD") system, Universal Mobile Telecommunication System ("UMTS"), evolved LTE system or 5G system, etc. The evolved LTE system refers to an enhanced LTE technology and system that uses the LTE air interface protocol on the wireless side but can access the 5G core network by enhancing the base station.

[0043] Optionally, the terminal device of the embodiment of the present application may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN, etc.

[0044] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0045] With the development of communications, the LTE-based Radio Access Network (RAN) can have the ability to access two or more core networks at the same time. For example, it can access the Evolved Packet Core (EPC) and the 5G Core (5G Core, 5GC) at the same time.

[0046] For example, the RAN in LTE can be upgraded to enable it to access EPC and 5GC.

[0047] The present application provides a wireless communication method, which can implement cell access for this scenario.

[0048] It should be understood that in many places in the embodiments of the present application, the core network types of EPC and 5GC are used as examples for explanation, but the embodiments of the present application are not limited to this. The core network type of the embodiments of the present application can be the core network of the 3G network and the core network after the evolution of the 5G core network, etc.

[0049] Figure 1 1 is a schematic flow chart of a wireless communication method 100 according to an embodiment of the present application. The method 100 may optionally be executed by a terminal device. The method 100 includes at least part of the following contents.

[0050] In 110, the terminal device selects a first cell according to the first core network type to be connected, where the first cell is a cell that supports the first core network type.

[0051] Among them, the first core network type may include EPC and / or 5GC. When EPC and 5GC are included, it means that the terminal device communicates with EPC and 5GC through the first cell.

[0052] Optionally, the terminal device determines, at the non-access layer NAS layer, according to the service type of the service to be handled, that the type of the core network to be connected is the first core network type.

[0053] Among them, the terminal device can select a core network type that can handle services of the service type according to the service type of the service to be processed.

[0054] If the service to be processed includes multiple services and needs to be processed by EPC and 5GC respectively, it can be determined that the first core network type includes EPC and 5GC, and the selected first cell needs to support both EPC and 5GC. If the service to be processed only needs to be processed by EPC, it can be determined that the first core network type is EPC, and the selected first cell may only support EPC, or support EPC and 5GC. If the service to be processed only needs to be processed by 5GC, it can be determined that the first core network type is 5GC, and the selected first cell may only support 5GC, or support EPC and 5GC. If the service to be processed can be processed by either EPC or 5GC, one of them can be selected according to the priority. For example, 5GC can be assumed to have a higher priority.

[0055] Optionally, the terminal can select which core network based on the non-access stratum (NAS) protocol capability of the terminal to access the core network type. For example, if the EPC NAS entity is supported, EPC can be selected, or EPC and 5GC can be selected. If the 5GC NAS entity is supported, 5GC can be selected, or 5GC and EPC can be selected.

[0056] Optionally, when a certain service can be processed by multiple types of core networks separately, a cell supporting one of the core network types may be selected, or a cell supporting the multiple types of core networks may be selected.

[0057] Among them, the terminal device can start the appropriate NAS entity, namely the 5GC NAS entity or the EPC NAS entity, at the NAS layer according to the needs of the business, thereby processing the corresponding business.

[0058] Therefore, in the embodiment of the present application, the required core network type is determined according to the business requirements, and the cell is selected based on this, so that the business requirements can be met.

[0059] It should be understood that in the embodiments of the present application, although many descriptions describe selecting the first cell based on the first core network type, the embodiments of the present application may also consider other factors when selecting a cell, such as cell status information (such as Cell Barred, Cell reserved), or measured signal quality measurement values ​​for cell selection, etc.

[0060] Optionally, after the terminal device obtains the system information and measurement information at the AS layer, it may submit the information to the access stratum (AS) layer.

[0061] In 120, the terminal device accesses the cell through the first cell.

[0062] In order to more clearly understand the present application, several methods of selecting the first cell are introduced below.

[0063] In one implementation, the terminal device determines, at the NAS layer, to select a first public land mobile network PLMN and / or a first radio access technology (Radio Access Technology, RAT) for access; at the access AS layer, the terminal device selects the first cell from the cells corresponding to the searched first PLMN and / or the first RAT based on the core network type supported by the cell corresponding to the searched first PLMN and / or the first RAT, and the first core network type.

[0064] Specifically, the terminal device can select the first PLMN and / or first RAT that needs to be accessed currently at the NAS layer, and indicate it to the AS layer, and determine at the AS layer that the cell corresponding to the first PLMN and / or first RAT can support the cell of the first core network type.

[0065] The AS layer may perform a cell search upon receiving an instruction from the NAS layer, specifically searching for cells corresponding to the first PLMN and / or the first RAT, and selecting a cell supporting the first core network type from the searched cells.

[0066] The AS layer may not perform a cell search upon receiving an instruction from the NAS layer, but may directly use the saved cell information to select the first cell, wherein the saved cell information may be obtained by performing a cell search during the PLMN list maintenance stage.

[0067] Optionally, the cell search in the embodiment of the present application may include cell synchronization and / or measurement, etc.

[0068] Optionally, in an embodiment of the present application, when searching for a cell, the terminal device may submit information obtained at the AS layer to the NAS layer.

[0069] Optionally, in an embodiment of the present application, the interaction between the NAS layer and the AS layer can be implemented through NAS layer and AS primitives.

[0070] Optionally, at the AS layer, the core network type supported by the searched cell is obtained from the system information of the searched cell.

[0071] Specifically, when the terminal device searches for a cell at the AS layer, it detects system information to obtain the core network type and / or cell status supported by the corresponding cell.

[0072] In one implementation, the terminal device selects a second PLMN that can support the first core network type according to the first core network type at the NAS layer, and indicates it to the AS layer; at the AS layer, the first cell is selected from the cells corresponding to the searched second PLMN.

[0073] Specifically, the terminal device can directly select the second PLMN that supports the first core network type at the NAS layer, and select the first cell from the cells corresponding to the searched second PLMN. If the first core network type is 5GC, the second PLMN can support only 5GC, or it can support 5GC and PLMN. If the first core network type is EPC, the second PLMN can support only EPC, or it can support 5GC and EPC. If the first core network type includes EPC and 5GC, the second PLMN can support EPC and 5GC.

[0074] Specifically, the terminal device can select the second PLMN that currently needs to be accessed at the NAS layer, and indicate it to the AS layer, and determine at the AS layer that the cell corresponding to the second PLMN can support the first core network type.

[0075] The AS layer may perform a cell search upon receiving an instruction from the NAS layer, specifically searching for cells corresponding to the second PLMN, and selecting cells supporting the first core network type from the searched cells.

[0076] Optionally, in an embodiment of the present application, when searching for a cell, the terminal device may submit information obtained at the AS layer to the NAS layer.

[0077] The AS layer may not perform a cell search upon receiving an instruction from the NAS layer, but may directly use the saved cell information to select the first cell, wherein the saved cell information may be obtained by performing a cell search during the PLMN list maintenance stage.

[0078] Optionally, the terminal device obtains the core network type supported by the searched cell from the system information of the searched cell at the AS layer.

[0079] Specifically, when the terminal device searches for a cell at the AS layer, it detects system information to obtain the core network type and / or cell status supported by the corresponding cell.

[0080] Optionally, the terminal device selects the first cell from the cells corresponding to the searched second PLMN at the AS layer according to the core network type supported by the cell corresponding to the searched second PLMN and the first core network type.

[0081] Specifically, if the second PLMN supports the first core network type, it may be that some cells of the second PLMN support the core network type, and then a cell supporting the first core network type may be selected from the cells corresponding to the second PLMN.

[0082] Of course, if the second PLMN supports the first core network type, all cells of the second PLMN may also support the core network type.

[0083] Optionally, the terminal device obtains the core network type supported by the searched cell from the system information of the searched cell at the AS layer.

[0084] Optionally, at the NAS layer, the second PLMN is selected according to a PLMN list, wherein the PLMN list indicates a core network type supported by each PLMN.

[0085] Specifically, the terminal device can maintain a PLMN list, which can indicate the core network type supported by each PLMN. In addition to indicating the core network type supported by each PLMN, the PLMN list can also indicate the status information of the cell corresponding to each PLMN, or the associated RAT, etc.

[0086] When selecting the second PLMN from the PLMN list, the second PLMN may be selected from the PLMNs supporting the first core network type. When selecting the second PLMN, cell status information and the like may also be considered simultaneously.

[0087] Optionally, the terminal device can perform a cell search at the AS layer to determine the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN; at the NAS layer, generate the PLMN list based on the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN.

[0088] Optionally, in an embodiment of the present application, when searching for a cell, the terminal device may submit information obtained at the AS layer to the NAS layer.

[0089] Optionally, the terminal device obtains the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN from the system information of the searched cell at the AS layer.

[0090] When searching for PLMN, the PLMN may be searched according to the core network type, for example, searching for PLMN that supports the first core network type.

[0091] Optionally, when a PLMN supports two or more core network types, the core network type can be sorted in the PLMN list for the PLMN. If a core network type is a low-priority core network type supported by the PLMN, then when a core network of this core network type is needed for service processing, the PLMN can also be selected as a low-priority PLMN.

[0092] Therefore, in an embodiment of the present application, the terminal device selects a first cell according to the first core network type to be connected, and the first cell is a cell that supports the first core network type; through the first cell, cell access is performed, and a cell that supports the required core network type can be selected. The cell selection can be reasonably performed to avoid the problem of inability to communicate due to improper cell selection, and more flexible communication scenarios can be supported. For example, a cell can support multiple core network types.

[0093] Figure 24 is a schematic block diagram of a terminal device 400 according to an embodiment of the present application. Figure 2 As shown, the terminal device 400 includes a processing unit 410 and a communication unit 420; wherein the processing unit 410 is used to: select a first cell according to the first core network type that needs to be connected, and the first cell is a cell that supports the first core network type; the access unit 420 is used to: perform cell access through the first cell.

[0094] Optionally, the processing unit 410 is further configured to:

[0095] At the non-access layer NAS layer, according to the service type of the service that needs to be processed, it is determined that the type of the core network to be connected is the first core network type.

[0096] Optionally, the processing unit 410 is further configured to:

[0097] At the NAS layer, determine and indicate to the AS layer the first public land mobile network PLMN and / or the first radio access technology RAT selected for access;

[0098] At the access AS layer, the first cell is selected from the cells corresponding to the first PLMN and / or the first RAT searched out according to the core network type supported by the cell corresponding to the first PLMN and / or the first RAT searched out, and the first core network type.

[0099] Optionally, the processing unit 410 is further configured to:

[0100] At the AS layer, the core network type supported by the searched cell is obtained from the system information of the searched cell, and the obtained information is passed to the NAS layer.

[0101] Optionally, the processing unit 410 is further configured to:

[0102] At the NAS layer, according to the first core network type, selecting and indicating to the AS layer a second PLMN capable of supporting the first core network type;

[0103] At the AS layer, the first cell is selected from the cells corresponding to the second PLMN that are searched.

[0104] Optionally, the processing unit 410 is further configured to:

[0105] At the AS layer, the first cell is selected from the cells corresponding to the second PLMN that are searched for, according to the core network type supported by the cell corresponding to the second PLMN that is searched for, and the first core network type.

[0106] Optionally, the processing unit 410 is further configured to:

[0107] At the AS layer, the core network type supported by the searched cell is obtained from the system information of the searched cell, and the obtained information is passed to the NAS layer.

[0108] Optionally, the processing unit 410 is further configured to:

[0109] At the NAS layer, according to the PLMN list, the second PLMN is selected and indicated to the AS layer, wherein the PLMN list indicates the core network type supported by each PLMN.

[0110] Optionally, the processing unit 410 is further configured to:

[0111] At the AS layer, a cell search is performed to determine the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN, and the searched information is passed to the NAS layer;

[0112] At the NAS layer, the PLMN list is generated according to the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN.

[0113] Optionally, the processing unit 410 is further configured to:

[0114] At the AS layer, the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN are obtained from the system information of the searched cell.

[0115] Optionally, the first type includes an evolved packet core network EPC and / or a 5G core network 5GC.

[0116] It should be understood that the terminal device 400 can correspond to the terminal device in the method embodiment and can implement the corresponding operations implemented by the terminal device in the method embodiment. For the sake of brevity, it will not be repeated here.

[0117] Figure 3 It is a schematic structural diagram of the system chip 600 according to an embodiment of the present application. Figure 3 The system chip 600 includes an input interface 601 , an output interface 602 , and the processor 603 and the memory 604 can be connected via an internal communication connection line. The processor 603 is used to execute the code in the memory 604 .

[0118] Optionally, when the code is executed, the processor 603 implements the method executed by the terminal device in the method embodiment. For the sake of brevity, it will not be described in detail here.

[0119] Figure 4 is a schematic block diagram of a communication device 700 according to an embodiment of the present application. Figure 4 As shown, the communication device 700 includes a processor 710 and a memory 720. The memory 720 may store program codes, and the processor 710 may execute the program codes stored in the memory 720.

[0120] Alternatively, if Figure 4 As shown, the communication device 700 may include a transceiver 730, and the processor 710 may control the transceiver 730 to communicate externally.

[0121] Optionally, the processor 710 may call program codes stored in the memory 720 to execute corresponding operations of the terminal device in the method embodiment, which will not be described in detail here for the sake of brevity.

[0122] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0123] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0124] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0125] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0126] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0127] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0128] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0129] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0130] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: Selecting a first cell according to a first core network type to be connected, where the first cell is a cell that supports the first core network type; Accessing the cell through the first cell; The selecting the first cell according to the type of the first core network to be connected includes: At a non-access stratum NAS layer, according to the first core network type, selecting and indicating to an access stratum AS layer a second public land mobile network PLMN capable of supporting the first core network type; At the AS layer, selecting the first cell from the cells corresponding to the second PLMN that are searched; The selecting, at the NAS layer, according to the first core network type, and indicating to the AS layer a second PLMN capable of supporting the first core network type includes: According to the priority of the core network type supported by each PLMN, a PLMN supporting the first core network type with a high priority is selected as the second PLMN.

2. The method according to claim 1, characterized in that The selecting, at the AS layer, the first cell from the cells corresponding to the second PLMN that are searched for, includes: At the AS layer, the first cell is selected from the cells corresponding to the second PLMN that are searched for, according to the core network type supported by the cell corresponding to the second PLMN that is searched for, and the first core network type.

3. The method according to claim 2, characterized in that The method further comprises: At the AS layer, the core network type supported by the searched cell is obtained from the system information of the searched cell, and the obtained information is passed to the NAS layer.

4. The method according to any one of claims 1 to 3, characterized in that The selecting, at the NAS layer, according to the first core network type, and indicating to the AS layer a second PLMN capable of supporting the first core network type comprises: At the NAS layer, the second PLMN is selected and indicated to the AS layer according to a PLMN list, wherein the PLMN list indicates core network types supported by each PLMN.

5. The method according to claim 4, characterized in that The method further comprises: At the AS layer, a cell search is performed to determine the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN, and the searched information is passed to the NAS layer; At the NAS layer, the PLMN list is generated according to the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN.

6. The method according to claim 5, characterized in that The method further comprises: At the AS layer, the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN are obtained from the system information of the searched cell.

7. The method according to any one of claims 1 to 3, characterized in that The first core network type includes an evolved packet core network EPC and / or a 5G core network 5GC.

8. The method according to claim 1, wherein: Before selecting the first cell according to the first core network type to be connected as needed, the method further includes: At the NAS layer, according to the service type of the service to be processed, it is determined that the type of the core network to be connected is the first core network type.

9. A terminal device, characterized in that: It includes a processing unit and an access unit; wherein The processing unit is configured to: select a first cell according to a first core network type that needs to be connected, where the first cell is a cell that supports the first core network type; The access unit is used to: perform cell access through the first cell; Wherein, the processing unit is specifically used for: At a non-access stratum NAS layer, according to the first core network type, selecting and indicating to an access stratum AS layer a second public land mobile network PLMN capable of supporting the first core network type; At the AS layer, selecting the first cell from the cells corresponding to the second PLMN that are searched; The processing unit is further specifically configured to: select a PLMN supporting the first core network type with a high priority as the second PLMN according to the priority of the core network type supported by each PLMN.

10. The device according to claim 9, characterized in that The processing unit is further configured to: At the AS layer, the first cell is selected from the cells corresponding to the second PLMN that are searched for, according to the core network type supported by the cell corresponding to the second PLMN that is searched for, and the first core network type.

11. The device according to claim 10, characterized in that The processing unit is further configured to: At the AS layer, the core network type supported by the searched cell is obtained from the system information of the searched cell, and the obtained information is passed to the NAS layer.

12. The device according to any one of claims 9 to 11, characterized in that The processing unit is further configured to: At the NAS layer, the second PLMN is selected and indicated to the AS layer according to a PLMN list, wherein the PLMN list indicates core network types supported by each PLMN.

13. The device according to claim 12, characterized in that The processing unit is further configured to: At the AS layer, a cell search is performed to determine the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN, and the searched information is passed to the NAS layer; At the NAS layer, the PLMN list is generated according to the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN.

14. The device according to claim 13, characterized in that The processing unit is further configured to: At the AS layer, the PLMN corresponding to the searched cell and the core network type supported by the corresponding PLMN are obtained from the system information of the searched cell, and this information is passed to the NAS layer.

15. The device according to any one of claims 9 to 11, characterized in that The first core network type includes an evolved packet core network EPC and / or a 5G core network 5GC.

16. The apparatus according to claim 9, wherein: The processing unit is further configured to: At the NAS layer, according to the service type of the service to be processed, it is determined that the type of the core network to be connected is the first core network type.

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