Wireless communication method, terminal device, and network device

Abstract

Provided are a wireless communication method, a terminal device, and a network device. The method comprises: a terminal device receives first information sent by a network device, wherein the first information is used for indicating information about a network supporting a first service. On the basis of the first information, the terminal device can obtain the support status of a certain network for the first service, so as to determine whether to execute the first service on the network or select an appropriate network to execute the first service (i.e., implementing on-demand network selection), thereby reducing the interoperability on the network side to a certain extent, and reducing the deployment cost and complexity of the network side.

Description

Wireless communication method, terminal device, and network device TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and more particularly, to a wireless communication method, a terminal device, and a network device. BACKGROUND

[0002] Voice solutions represented by the 5th generation (5G) network voice solution mainly include network-side interoperation processes (including handover (HO), redirection, session reconstruction / recovery), etc. With the development of technology, communication networks (such as the 6th generation (6G) network) can be deployed in the form of multiple hotspots and multiple subnets. Among them, each hotspot or subnet only supports part of the proprietary functions and does not support part of the services (such as voice services). In this case, the mode relying on network-side interoperation will greatly increase the deployment cost and complexity of the network side.

[0003] SUMMARY

[0004] The present application provides a wireless communication method, a terminal device, and a network device. The various aspects involved in the present application are introduced below.

[0005] In a first aspect, a wireless communication method is provided, which includes: a terminal device receiving first information sent by a network device; wherein the first information includes one or more of the following: a first parameter for indicating a type of a network supporting a first service; a second parameter for indicating a public land mobile network and / or a radio access technology type corresponding to the network supporting the first service; and a third parameter for indicating whether the network device allows the terminal device to search for other networks except for a first network to obtain the first service, the first network being a network corresponding to the network device.

[0006] In a second aspect, a wireless communication method is provided, which includes: a network device sending first information to a terminal device; wherein the first information includes one or more of the following: a first parameter for indicating a type of a network supporting a first service; a second parameter for indicating a public land mobile network and / or a radio access technology type corresponding to the network supporting the first service; and a third parameter for indicating whether the network device allows the terminal device to search for other networks except for a first network to obtain the first service, the first network being a network corresponding to the network device.

[0007] In a third aspect, a terminal device is provided, which comprises a receiving unit configured to receive first information sent by a network device; wherein the first information comprises one or more of the following: a first parameter configured to indicate a type of a network supporting a first service; a second parameter configured to indicate a public land mobile network and / or a radio access technology type corresponding to the network supporting the first service; and a third parameter configured to indicate whether the terminal device is allowed to search for other networks than a first network corresponding to the network device to obtain the first service.

[0008] In a fourth aspect, a network device is provided, which comprises a sending unit configured to send first information to a terminal device; wherein the first information comprises one or more of the following: a first parameter configured to indicate a type of a network supporting a first service; a second parameter configured to indicate a public land mobile network and / or a radio access technology type corresponding to the network supporting the first service; and a third parameter configured to indicate whether the terminal device is allowed to search for other networks than a first network corresponding to the network device to obtain the first service.

[0009] In a fifth aspect, a terminal device is provided, which comprises a processor and a memory, wherein the memory is configured to store one or more computer programs, and the processor is configured to invoke the computer programs in the memory to cause the terminal device to perform some or all of the steps in the method of the first aspect.

[0010] In a sixth aspect, a network device is provided, which comprises a processor, a memory and a transceiver, wherein the memory is configured to store one or more computer programs, and the processor is configured to invoke the computer programs in the memory to cause the network device to perform some or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which comprises the terminal device and / or the network device described above. In another possible design, the system can further comprise other devices interacting with the terminal device or the network device in the solutions provided by the embodiments of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program causes a terminal device and / or a network device to perform some or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, an embodiment of the present application provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program operable to cause an end device and / or a network device to perform some or all of the steps in the methods of the various aspects described above. In some implementations, the computer program product can be a software installation package.

[0014] In a tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can invoke and run a computer program from the memory to implement some or all of the steps described in the methods of the various aspects described above.

[0015] Based on the first information, the end device can acquire the support of the first service by a certain network, so as to determine whether to perform the first service on the network or select a suitable network to perform the first service (i.e., implement on-demand network selection), and further reduce the interoperation of the network side to a certain extent, so as to reduce the deployment cost and complexity of the network side. BRIEF DESCRIPTION OF DRAWINGS

[0016] FIG. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applied.

[0017] FIG. 2A is a schematic diagram of a 4G voice scheme 1.

[0018] FIG. 2B is a schematic diagram of a 4G voice scheme 2.

[0019] FIG. 2C is a schematic diagram of a 4G voice scheme 3.

[0020] FIG. 3A is a schematic diagram of a 5G voice scheme 1.

[0021] FIG. 3B is a schematic diagram of a 5G voice scheme 2.

[0022] FIG. 3C is a schematic diagram of a 5G voice scheme 3.

[0023] FIG. 4 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.

[0024] FIG. 5 is a schematic flowchart of a wireless communication method provided by an embodiment 1 of the present application.

[0025] FIG. 6 is a schematic flowchart of a wireless communication method provided by an embodiment 2 of the present application.

[0026] FIG. 7 is a schematic flowchart of a wireless communication method provided by an embodiment 3 of the present application.

[0027] FIG. 8 is a schematic structural diagram of an end device provided by an embodiment of the present application.

[0028] FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present application.

[0029] FIG. 10 is a schematic structural diagram of an apparatus for communication according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0031] Communication system

[0032] FIG. 1 is a wireless communication system 100 to which embodiments of the present application are applied. The wireless communication system 100 can include communication devices. The communication devices can include a network device 110 and a terminal device 120. The network device 110 can be a device that communicates with the terminal device 120.

[0033] FIG. 1 exemplarily shows one network device and two terminals. Optionally, the wireless communication system 100 can include a plurality of network devices and each network device can include other numbers of terminal devices within its coverage, which is not limited in the embodiments of the present application.

[0034] Optionally, the wireless communication system 100 can further include a network controller, a mobile management entity, and other network entities, which are not limited in the embodiments of the present application.

[0035] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a 5th generation (5G) system or new radio (NR), a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), and the like. The technical solutions provided by the present application can also be applied to future communication systems, such as a 6th generation mobile communication system, a satellite communication system, and the like.

[0036] The terminal device in the embodiments of the present application can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station (MS), a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user apparatus. The terminal device in the embodiments of the present application can refer to a device providing voice and / or data connectivity for a user, and can be used to connect people, things and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer (Pad), a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity, which provides sidelink signals between UEs in vehicle-to-everything (V2X) or device to device (D2D), etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and the smart home device communicate with each other without relaying the communication signals through the base station.

[0037] The network device in the embodiments of the present application can be a device for communicating with a terminal device. The network device can also include an access network device. The access network device can provide communication coverage for a specific geographic area and can communicate with terminal devices 120 located within the coverage area. The access network device can also be referred to as a radio access network device or a base station, etc. The access network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network. The access network device can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master eNB (MeNB), secondary eNB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, centralized unit-control plane (CU-CP), centralized unit-user plane (CU-UP), etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station can also refer to a communication module, modem, or chip used in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs the function of a base station in D2D, V2X, machine-to-machine (M2M) communication, a network side device in a 6G network, a device that performs the function of a base station in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device.

[0038] The base station can be fixed or mobile. For example, a helicopter or unmanned aerial vehicle can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or unmanned aerial vehicle can be configured to act as a device that communicates with another base station.

[0039] The communication devices involved in the wireless communication system can include not only access network devices and terminal devices, but also core network elements. The core network element can be implemented by a device, that is, the core network element is a core network device. It can be understood that the core network device can also be a kind of network device.

[0040] The core network element in the embodiment of the present application can include a network element that processes and forwards signaling and data of a user. For example, the core network device can include a core network access and mobility management function (core access and mobility management function, AMF), a session management function (session management function, SMF), a location management function (location management function, LMF), a network slice selection function (network slice selection function, NSSF), an authentication server function (authentication server function, AUSF), a unified data management (unified data management, UDM), a policy control function (policy control function, PCF), a user plane function (user plane function, UPF), a sensing function (sensing function, SF), a network data analytics function (network data analytics function, NWDAF) network element, an artificial intelligence (artificial intelligence, AI) function management entity, etc. Of course, other network elements can also be included in the core network, which are not listed here.

[0041] In some deployments, the network device in the embodiment of the present application can refer to a CU or a DU, or the network device includes a CU and a DU. The gNB can also include an AAU.

[0042] The network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed on the aircraft, balloon and satellite in the air. The scene where the network device and the terminal device are located is not limited in the embodiment of the present application.

[0043] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform, such as a cloud platform.

[0044] Voice solution in communication system

[0045] Voice is a mandatory capability for each mobile communication system. Considering the limitations of terminal device capability, network deployment, user experience, and other aspects, the voice solution is often selected according to the actual network demand. The following lists the voice solutions in 4G and 5G.

[0046] 4G voice solution 1: voice over long-term evolution (VoLTE) / enhanced single radio voice call continuity (eSRVCC)

[0047] FIG. 2A is a schematic diagram of 4G voice solution 1. As shown in FIG. 2A, under this solution, voice service is implemented based on IP multimedia subsystem (IMS). This solution can support voice continuity from LTE to 2G / 3G network.

[0048] The advantages of this solution include: voice based on LTE, good sound quality, high spectrum utilization, and concurrent voice and data services.

[0049] The disadvantages of this solution include: the need to deploy IMS, and the requirement for terminal devices to support IMS protocol stack and single radio voice call continuity (SRVCC) capability.

[0050] 4G voice solution 2: circuit switching (CS) domain fallback

[0051] FIG. 2B is a schematic diagram of 4G voice solution 2. As shown in FIG. 2B, under this solution, the terminal device is single standby, and when there is a voice service demand, it needs to fall back to the CS domain, i.e., the 2G / 3G network provides voice service.

[0052] The advantages of this solution include: lower requirements for terminal devices, and the ability to reuse 2G / 3G networks.

[0053] The disadvantages of this solution include: the need for modification of 2G / 3G networks, longer latency, and the inability to concurrently support voice and data services.

[0054] 4G voice solution 3: simultaneous voice and LTE (SvLTE)

[0055] Figure 2C is a schematic diagram of 4G voice solution 3. As shown in Figure 2C, under this solution, the terminal needs dual standby, and voice service is provided by a 2G / 3G network.

[0056] Advantages of this solution include: small changes to the network, unchanged user experience, concurrent voice and data, and no need for switching.

[0057] Disadvantages of this solution include: the terminal device needs to support dual standby, and the chip and battery endurance of the terminal device have higher requirements.

[0058] 5G voice solution 1: 5G NR natively supports IMS voice

[0059] Figure 3A is a schematic diagram of 5G voice solution 1. As shown in Figure 3A, under this solution, the terminal device accesses a 5G core network (5GC) through NR, and initiates voice over new radio (VoNR) in priority. This solution provides switching capability (5GS->EPS HO) with LTE / EPC.

[0060] Advantages of this solution include: standalone (SA) networking, relatively simple network topology; and less adaptation workload of the terminal device and the network at the IMS layer (IMS protocol stack of VoLTE can be reused).

[0061] Disadvantages of this solution include: in the case of scattered NR deployment, frequent cross-system switching is needed, and voice continuity is a big challenge.

[0062] 5G voice solution 2: the terminal device implements voice call through system fallback to LTE / EPC

[0063] Figure 3B is a schematic diagram of 5G voice solution 2. As shown in Figure 3B, under this solution, the terminal device accesses a 5GC through NR. The terminal device initiates a normal call request, cross-system fallback is triggered by the network side, and voice establishment is continued after fallback by executing SIP messages.

[0064] Features of this solution include: no additional impact on the terminal device (the terminal does not need to determine voice fallback, and only needs to initiate SIP messages), and SIP signaling flow will be interrupted / retransmitted due to fallback.

[0065] 5G voice solution 3: the terminal device implements voice call through radio access technology (RAT) fallback to LTE / 5GC

[0066] FIG. 3C is a schematic diagram of a 5G voice solution 3. As shown in FIG. 3C, under this solution, a terminal device accesses a 5GC through an NR. The terminal device initiates a normal SIP invite message, a system-in intra-fall (RAT fall) is triggered by a network side, and after the fall, a SIP message is continued to be executed to complete voice establishment.

[0067] Characteristics of this solution include: no additional impact on the terminal device (the terminal does not need to determine voice fall and only needs to initiate a call message); SIP signaling flow is interrupted / retransmitted due to fall; and system-in fall is generally a handover fall.

[0068] Voice solutions represented by 5G voice solutions mainly include network-side interoperation processes (including handover, redirection, session reconstruction / recovery), etc. With the development of technology, communication networks (for example, 6G networks) can be deployed in a multi-hotspot, multi-subnet form. Among them, each hotspot or subnet only supports part of the proprietary functions, but does not support part of the services (for example, voice services). In this case, the mode relying on network-side interoperation will greatly increase the deployment cost and complexity of the network side.

[0069] FIG. 4 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application to solve the above problems. The method shown in FIG. 4 can be executed by a terminal device and a network device. The network device may, for example, be a core network device (for example, an AMF).

[0070] The method shown in FIG. 4 can include step S410.

[0071] In step S410, the terminal device receives first information. Correspondingly, the network device can send the first information.

[0072] The first information can be used to indicate information of a network supporting a first service. That is, the first information can be used to indicate network-side information related to the first service.

[0073] The first service may, for example, include one or more of the following: a voice service, a vehicle-to-everything service, an XR service, and an emergency call service. Taking the voice service as an example, the first information can be used to indicate information of a network supporting the voice service.

[0074] It should be noted that the present application does not limit the type of network indicated by the first information. For example, the type of network can include one or more of the following: a 5G network (or NR / 5GC (or 5GS)), a 4G network (or evolved universal terrestrial radio access network (E-UTRA) / evolved packet core (EPC) (or evolved packet system (EPS))), a 6G network, a non-3GPP network. If the first information indicates information of a non-3GPP network, the first information can include access point identification (such as SSID) information. If the network is accessed through a satellite, the first information can include geostationary orbit (GEO) / medium earth orbit (MEO) / low earth orbit (LEO) access information, etc.

[0075] In some embodiments, the first information can include one or more of the following: a first parameter, a second parameter, a third parameter. The following will be described respectively.

[0076] The first parameter can be used to indicate the type of network that supports the first service and / or the type of network that does not support the first service. Alternatively, the first parameter can indicate what kind of network supports / does not support the first service.

[0077] It should be noted that the present application does not limit the type of network indicated by the first parameter. For example, the type of network can include one or more of the following: a 5G network (or NR / 5GC (or 5GS)), a 4G network (or E-UTRA / EPC (or EPS)), a 6G network, a non-3GPP network. That is, the first parameter can be used to indicate that one or more of the following supports the first service: a 5G network, a 4G network, a 6G network, a non-3GPP network.

[0078] In some embodiments, based on the first parameter, the terminal device can initiate a registration procedure and / or an attachment procedure according to or using a first type of message, wherein the first type can be indicated by the first parameter. For example, when the terminal device accesses a corresponding cell and establishes an access layer connection with the cell, a non access stratum (NAS) message (such as 5GS NAS) of a type corresponding to the first parameter can be used to initiate a NAS registration or attachment procedure.

[0079] The second parameter can be used to indicate a public land mobile network (PLMN) and / or a RAT type corresponding to the network supporting the first service. For example, the second parameter can indicate a PLMN ID corresponding to the network supporting the first service. Illustratively, the second parameter can indicate that the PLMN-a supports the first service, i.e., the network with the PLMN ID a supports the first service. For another example, the second parameter can indicate a RAT type corresponding to the network supporting the first service. Illustratively, the second parameter can indicate that the NR access network supports the first service.

[0080] In some embodiments, based on the second parameter, the terminal device can search for a first cell. The first cell can be a cell corresponding to a public land mobile network and / or a radio access technology type corresponding to the network supporting the first service indicated by the second parameter. For example, the terminal device can search for a cell with a PLMN ID and / or a corresponding RAT indicated by the second parameter, and establish an access layer connection (such as an RRC connection, etc.).

[0081] The third parameter can be used to indicate whether the network device allows the terminal device to search for other networks in addition to the first network to obtain the first service. The first network is the network corresponding to the network device sending the first information. For example, the network device can allow the terminal device to search for other networks to obtain the first service while maintaining or using the first network. In this case, the network device can send the third parameter, which can be used to indicate whether the terminal device is allowed to search for other networks to obtain the first service while maintaining or using the first network.

[0082] In some embodiments, the third parameter is an optional parameter. In one case, the terminal device can search for other networks supporting the first service while being registered to the first network only when it receives the parameter. In another case, the terminal device can search for other networks supporting the first service while being registered to the first network by default when it receives an indication that the first service is not supported.

[0083] Optionally, the third parameter can reuse a parameter in related technologies. Taking the first service including voice service as an example, if the first network does not support voice service, the third parameter can reuse a parameter in related technologies, for example, the third parameter can be indicated by "IMS voice over PS session is not supported" in a registration reply message. In this case, the terminal device can search for other networks in addition to the first network by itself when it receives the parameter.

[0084] Optionally, the third parameter can be a newly defined parameter. Taking the first service including voice service as an example, the third parameter can be a newly defined "voice search" indication. The "voice search" indication can be used to inform the terminal device that the network device allows the terminal device to search other networks to obtain voice service.

[0085] It should be noted that the present application does not limit the form of the network device sending the first parameter, the second parameter or the third parameter. For example, the first parameter, the second parameter and the third parameter can be sent respectively through different parameters. Alternatively, at least two of the first parameter, the second parameter and the third parameter can be sent through the same parameter.

[0086] In some embodiments, the first information includes the third parameter. According to the indication of the third parameter, the terminal device can immediately determine whether to search other networks in addition to the first network, thereby quickly and efficiently obtaining the first service.

[0087] In some embodiments, the first information includes the second parameter. The terminal device can search the PLMN and / or RAT type indicated by the second parameter according to the indication of the second parameter, thereby avoiding attempting to search the PLMN and / or RAT type that does not support the first service, and improving the efficiency of searching the network supporting the first service.

[0088] In some embodiments, the first information includes the first parameter. The terminal device can initiate the registration process and / or the attachment process according to the indication of the first parameter, thereby avoiding attempting to register and / or attach to the type of network that does not support the first service, and improving the efficiency of registering and / or attaching to the network supporting the first service.

[0089] In some embodiments, the first information includes the first parameter and the second parameter. In order to obtain the first service, the terminal device can search the network according to the PLMN and / or RAT type indicated by the second parameter, and register and / or attach according to the network type indicated by the first parameter, thereby improving the efficiency of searching, registering and attaching to the network supporting the first service.

[0090] In some embodiments, the first information includes the first parameter and the third parameter. According to the indication of the third parameter, the terminal device can immediately determine whether to search other networks in addition to the first network, and according to the network type indicated by the first parameter, the terminal device can explicitly register and / or attach, thereby quickly and efficiently obtaining the first service.

[0091] In some embodiments, the first information includes the second parameter and the third parameter. According to the indication of the third parameter, the terminal device can immediately determine whether to search other networks in addition to the first network, and according to the PLMN and / or RAT type indicated by the second parameter, the terminal device can explicitly search, thereby quickly and efficiently obtaining the first service.

[0092] In some embodiments, the first information comprises a first parameter, a second parameter and a third parameter. According to the indication of the third parameter, the terminal device can immediately determine whether to search for other networks in addition to the first network, according to the second parameter to explicitly search for the PLMN and / or the RAT type, and according to the first parameter to explicitly perform registration and / or attachment to the network type, thereby quickly and efficiently obtaining the first service.

[0093] Based on the first information, the terminal device can obtain whether the network supports the first service, and can also obtain the support of the network for the first service, thereby judging whether to perform the first service on the network or selecting a suitable network to perform the first service (i.e. implementing on-demand network selection), and further reducing the interoperability of the network side to a certain extent, thereby reducing the deployment cost and complexity of the network side.

[0094] For example, according to the first information, the terminal device can determine whether to select other networks in addition to the first network to perform the first service. Illustratively, with the development of technology, the terminal device can support the ability to maintain and / or use multiple wireless connections at the same time. In this case, based on the first information, the terminal device can maintain or use the wireless connection corresponding to the network device sending the first information, and can also simultaneously maintain or use another wireless connection to perform the first service according to the indication of the first information. For example, in the case where the first network does not support the first service, the terminal device can maintain the first network registration state while selecting the other network to perform the first service. Based on this technical solution, not only can on-demand network selection be achieved, but also the ability of the terminal device can be fully utilized.

[0095] In some embodiments, the terminal device can send second information to the network device. The second information can be used to indicate the ability of the terminal device to maintain and / or use multiple wireless connections at the same time. In other words, the second information can be used to indicate the multi-registration or multi-access related capability of the terminal device.

[0096] As a possible implementation, the second information can indicate whether the terminal device supports maintaining and / or using multiple wireless connections simultaneously. Illustratively, the second information can occupy a first bit. The first bit can be used to indicate whether the terminal device supports maintaining multiple wireless connections simultaneously. For example, the first bit being 0 can indicate that the terminal device does not support maintaining multiple wireless connections simultaneously; the first bit being 1 can indicate that the terminal device supports maintaining multiple wireless connections simultaneously. Alternatively, the first bit being 1 can indicate that the terminal device does not support maintaining multiple wireless connections simultaneously; the first bit being 0 can indicate that the terminal device supports maintaining multiple wireless connections simultaneously. Illustratively, the second information can occupy a second bit. The second bit can be used to indicate whether the terminal device supports using multiple wireless connections simultaneously. For example, the second bit being 0 can indicate that the terminal device does not support using multiple wireless connections simultaneously; the second bit being 1 can indicate that the terminal device supports using multiple wireless connections simultaneously. Alternatively, the second bit being 1 can indicate that the terminal device does not support using multiple wireless connections simultaneously; the second bit being 0 can indicate that the terminal device supports using multiple wireless connections simultaneously.

[0097] Based on the second information, the network device can obtain the capability of the terminal device whether supporting maintaining and / or using multiple wireless connections simultaneously, i.e., implement on-demand capability negotiation, so as to make full use of the capability of the terminal device. For example, in the case that the terminal device supports maintaining and / or using multiple wireless connections simultaneously, the network device can instruct the terminal device to search for other networks supporting the first service while maintaining the first network, so that the terminal device can maintain the first network and the network supporting the first service simultaneously. That is, the second capability can be used as an important basis for network selection for the first service (e.g., voice network selection). In this case, the network side has less changes and can not need to support complex interoperation processes.

[0098] In some embodiments, the second information can be used to indicate whether the terminal device supports the first capability and / or the second capability.

[0099] In the case of supporting the first capability, the terminal device supports maintaining multiple wireless connections simultaneously. Wherein, maintaining multiple wireless connections simultaneously can mean that the terminal device registers and establishes connections on networks corresponding to multiple RATs and / or PLMNs. The terminal device supporting the first capability can maintain the validity of control plane signaling, such as performing periodic location update to maintain reachability.

[0100] It should be noted that in the case of supporting the first capability, the terminal device can only support non-simultaneous data transmission, i.e., can only transmit data on one network at the same time in the user plane.

[0101] In the case of supporting the second capability, the terminal device supports transmitting data through multiple wireless connections at the same time. Wherein, transmitting data through multiple wireless connections at the same time can refer to that the terminal device can register on the network corresponding to multiple RATs and / or PLMNs, establish a user plane connection and transmit data at the same time

[0102] It should be noted that the present application does not limit the form of the terminal device reporting the first capability and the second capability. In some embodiments, the terminal device can report the first capability and the second capability respectively. For example, the terminal device can report the first capability and the second capability through two parameters respectively. Alternatively, the terminal device can report the first capability and the second capability through one parameter.

[0103] In some embodiments, the second information can be interacted in a registration or attachment process. Wherein, the registration process can be a 6G registration or attachment process, or a 5G\4G network registration or attachment process. For example, the second information can be carried in a registration request message. In other words, the terminal device can send the capability of the terminal device simultaneously maintaining and / or using multiple wireless connections through the registration request message.

[0104] In some embodiments, the first information can be interacted in a registration or attachment process. Wherein, the registration process can be a 6G registration or attachment process, or a 5G\4G network registration or attachment process. For example, the first information can be carried in a registration reply message. In other words, the network device can send the information of the network supporting the first service through the registration reply message. Wherein, the registration reply message can be a registration accept message or a registration reject message. Whether the registration reply message is a registration accept message or a registration reject message can depend on factors such as network side policy, user equipment usage type (UE usage type) and the like.

[0105] In some embodiments, the terminal device can send third information to the network device. The third information can include one or more of the following: the capability of the terminal device simultaneously maintaining / using multiple wireless connections, the user equipment usage type of the terminal device.

[0106] As a possible implementation manner, the network device can determine whether to send the first information according to the third information. Wherein, the capability of the terminal device simultaneously maintaining / using multiple wireless connections can be obtained through the second information, that is, the third information can include the second information. The user equipment usage type can include "voice centric" or "data centric".

[0107] For example, if the terminal device does not support maintaining multiple wireless connections at the same time, or the terminal device does not support using multiple wireless connections at the same time, the network device can not send the first information. For another example, if the terminal device supports maintaining multiple wireless connections at the same time, and / or the terminal device supports using multiple wireless connections at the same time, the network device can send the first information.

[0108] For another example, in the case where the first service includes voice service, if the user equipment usage type is "voice centric", the network device can send the first information. If the user equipment usage type is "data centric", the network device can not send the first information.

[0109] In some embodiments, the terminal device can send fourth information to the network device. The fourth information can be used to indicate that the terminal device selects a network other than the first network to perform the first service while maintaining the first network registration state. Taking the case where the first service includes voice service as an example, the behavior of maintaining the first network registration state and selecting a network other than the first network to perform voice service can be referred to as "self voice network selection". In this case, the fourth information can also be referred to as indication information of self voice network selection.

[0110] As a possible implementation manner, the terminal device can determine whether to select a network other than the first network to perform the first service according to its own capability (for example, whether to support the first capability and / or the second capability) and / or the received first information. For example, if the terminal device supports the first capability and / or the second capability, the terminal device can determine to select a network other than the first network to perform the first service. For another example, if the terminal device does not support the first capability or the second capability, the terminal device can determine not to select a network other than the first network to perform the first service. For another example, if the terminal device determines to select a network other than the first network to perform the first service, the network supporting the first service can be selected to perform the first service according to the indication of the first information.

[0111] For the convenience of understanding the present application, embodiments 1-3 will be described in detail below in conjunction with the accompanying drawings. In embodiments 1-3, the network device performing the method shown in FIG. 4 includes a 6G core network element (for example, AMF); the first service includes voice service.

[0112] Embodiment 1

[0113] FIG. 5 is a schematic flowchart of a wireless communication method provided by embodiment 1. The method shown in FIG. 5 can include steps S510-S550.

[0114] S510, the terminal device sends a registration request message to the 6G core network element.

[0115] The registration request message can carry the first capability or the second capability indication. The registration request message can also carry a user equipment use type parameter.

[0116] S520, the 6G core network element sends a registration reply message to the terminal device. The registration reply message carries the first parameter and / or the second parameter.

[0117] The 6G core network element determines whether to inform the terminal device of support for voice services or indicate network information (such as the first parameter and / or the second parameter) that supports voice services according to the indication parameter in step S510.

[0118] S530, the terminal device selects a 5G network that supports voice services according to the first parameter and / or the second parameter.

[0119] If the terminal device receives the second parameter, the terminal device can search for a cell with a PLMN ID corresponding to the second parameter and / or a corresponding RAT and establish an access layer connection (such as an RRC connection).

[0120] When the terminal device accesses the corresponding cell and establishes an access layer connection with the cell, the terminal device can initiate a NAS registration or attachment process using a first parameter corresponding type of NAS message (such as 5GS NAS).

[0121] It should be noted that the network that supports voice services can be a 5G network or a 6G, 4G, etc. network. Although some embodiments of the present application are exemplified by a 5G network, there is no absolute limitation.

[0122] S540-S550, after the registration process is performed, the terminal device establishes a PDU session for IMS services and performs an IMS registration process on the PDU session.

[0123] Embodiment 2

[0124] FIG. 6 is a schematic flowchart of a wireless communication method according to an embodiment of the present application. The method shown in FIG. 6 can include steps S610-S650.

[0125] S610, the terminal device sends a registration request message to a 6G core network element.

[0126] The registration request message can carry the first capability or the second capability indication. The registration request message can also carry a user equipment use type parameter.

[0127] Step S620, the 6G core network element carries a "no voice support" indication (a parameter defined in the related art, corresponding to IMS voice over PS session is not supported in the registration reply message) and / or a "voice search" indication (a new parameter defined in the present application, used to inform the terminal device that the network allows the terminal device to search for other networks to obtain voice services) in the registration reply message.

[0128] Step S630, the terminal device selects a network supporting voice services by itself.

[0129] Steps S640 and S650, the terminal device can attempt to select other cells. The terminal device can determine whether the 5G network supports voice services (i.e., whether the registration reply message supports voice services) through the registration process in step S640. When the terminal device registers with the 5G network, the terminal device can maintain the registration status with the current 6G network due to the support of the first capability or the second capability.

[0130] Embodiment 3

[0131] FIG. 7 is a schematic flowchart of a wireless communication method provided in Embodiment 3. The method shown in FIG. 7 can include steps S710-S760.

[0132] S710, the terminal device sends a registration request message to a 6G core network element.

[0133] The registration request does not carry capability information. That is, the network side does not need to know whether the terminal device supports the first capability or the second capability.

[0134] S720, the 6G core network element sends a registration reply message to the terminal device.

[0135] The registration reply message can carry a "no voice support" indication. Optionally, the registration reply message can carry a "voice search" indication, a first parameter, and / or a second parameter.

[0136] S740, the terminal device determines whether to perform "voice network selection" according to its capability (whether to support the first capability or the second capability) and / or the parameters obtained in step S720. In this case, the terminal device can perform step S730.

[0137] Step S730, the terminal device optionally sends a registration complete message. The registration complete message carries a "self voice network selection" indication, informing the 6G core network to select other networks to perform voice services while maintaining the current 6G network registration status.

[0138] Steps S750 and S760, the terminal device can attempt to select other cells. The terminal device can determine whether the 5G network supports voice services (i.e., whether the voice service is supported in the registration reply message) through the registration process in step S750. When the terminal device registers with the 5G network, the terminal device can maintain the registration status with the current 6G network due to the first capability or the second capability supported by the terminal device.

[0139] It should be noted that step S730 can occur after step S760. Alternatively, step S730 can occur after any one of steps S740 to S760.

[0140] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, and therefore, the parts not described in detail can be referred to the foregoing method embodiments.

[0141] FIG. 8 is a schematic structural diagram of a terminal device 800 according to an embodiment of the present application. The terminal device 800 can include a receiving unit 810.

[0142] The receiving unit 810 is configured to receive first information sent by a network device; wherein the first information includes one or more of the following: a first parameter, used to indicate a type of a network supporting a first service; a second parameter, used to indicate a public land mobile network and / or a radio access technology type corresponding to the network supporting the first service; and a third parameter, used to indicate whether the network device allows the terminal device to search for a network other than a first network to obtain the first service, the first network being a network corresponding to the network device.

[0143] In some embodiments, the terminal device 800 is further configured to search for a first cell, the first cell being a cell corresponding to the public land mobile network and / or the radio access technology type corresponding to the network supporting the first service indicated by the second parameter.

[0144] In some embodiments, the terminal device 800 is further configured to initiate a registration procedure and / or an attachment procedure according to a first type of message, the first type being indicated by the first parameter.

[0145] In some embodiments, the terminal device 800 is further configured to send second information to the network device; wherein the second information is used to indicate a capability of the terminal device to simultaneously maintain and / or use multiple wireless connections.

[0146] In some embodiments, the second information is used to indicate whether the terminal device supports a first capability and / or a second capability, wherein the terminal device supports maintaining multiple wireless connections simultaneously in the case of supporting the first capability, and the terminal device supports transmitting data through multiple wireless connections simultaneously in the case of supporting the second capability.

[0147] In some embodiments, the second information is carried in a registration request message.

[0148] In some embodiments, the first information is carried in a registration reply message.

[0149] In some embodiments, the terminal device 800 is further configured to determine, according to the first information, whether to select another network other than the first network to perform the first service.

[0150] In some embodiments, in the case that the terminal device supports maintaining and / or using multiple wireless connections simultaneously, and the first network does not support the first service, the terminal device selects the other network to perform the first service while maintaining the first network registration state.

[0151] In some embodiments, the terminal device 800 is further configured to send fourth information to the network device, wherein the fourth information is used to indicate that the terminal device selects the other network to perform the first service while maintaining the first network registration state.

[0152] In some embodiments, the first service includes one or more of the following: voice service, vehicle-to-everything service, extended reality service, emergency call service.

[0153] In optional embodiments, the receiving unit 810 can be a transceiver 1030. The terminal device 800 can further include a processor 1010 and a memory 1020, as shown in FIG. 10.

[0154] FIG. 9 is a schematic structural diagram of a network device 900 according to an embodiment of the present application. The network device 900 includes a sending unit 910.

[0155] The sending unit 910 is configured to send first information to a terminal device, wherein the first information includes one or more of the following: a first parameter used to indicate a type of a network supporting a first service; a second parameter used to indicate a public land mobile network and / or a radio access technology type corresponding to the network supporting the first service; and a third parameter used to indicate whether the network device allows the terminal device to search for another network other than the first network to obtain the first service, the first network being a network corresponding to the network device.

[0156] In some embodiments, the network device 900 is further configured to: receive second information sent by the terminal device; wherein the second information is used to indicate a capability of the terminal device to simultaneously maintain and / or use multiple wireless connections.

[0157] In some embodiments, the second information is used to indicate whether the terminal device supports a first capability and / or a second capability, wherein in a case that the terminal device supports the first capability, the terminal device supports to simultaneously maintain multiple wireless connections, and in a case that the terminal device supports the second capability, the terminal device supports to simultaneously transmit data through multiple wireless connections.

[0158] In some embodiments, the second information is carried in a registration request message.

[0159] In some embodiments, the first information is carried in a registration reply message.

[0160] In some embodiments, the network device 900 is further configured to: determine whether to send the first information based on third information, wherein the third information comprises one or more of: the capability of the terminal device to simultaneously maintain / use multiple wireless connections; a user equipment usage type of the terminal device.

[0161] In some embodiments, the network device 900 is further configured to: receive fourth information sent by the terminal device; wherein the fourth information is used to indicate that the terminal device selects another network to perform first service in a case that the terminal device maintains the first network registration state.

[0162] In some embodiments, the first service comprises one or more of: voice service, vehicle-to-everything service, extended reality service, emergency call service.

[0163] In optional embodiments, the sending unit 910 can be a transceiver 1030. The network device 900 can further include a processor 1010 and a memory 1020, as shown in FIG. 10.

[0164] FIG. 10 is a schematic structural diagram of an apparatus for communication according to an embodiment of the present application. The dashed line in FIG. 10 indicates that the unit or module is optional. The apparatus 1000 can be used to implement the method described in the above method embodiments. The apparatus 1000 can be a chip, a terminal device or a network device.

[0165] The apparatus 1000 can include one or more processors 1010. The processor 1010 can support the apparatus 1000 to implement the methods described in the foregoing method embodiments. The processor 1010 can be a general purpose processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0166] The apparatus 1000 can also include one or more memories 1020. The memory 1020 stores a program that can be executed by the processor 1010, so that the processor 1010 executes the methods described in the foregoing method embodiments. The memory 1020 can be independent of the processor 1010 or integrated in the processor 1010.

[0167] The apparatus 1000 can also include a transceiver 1030. The processor 1010 can communicate with other devices or chips through the transceiver 1030. For example, the processor 1010 can perform data transceiving with other devices or chips through the transceiver 1030.

[0168] The embodiments of the present application also provide a computer readable storage medium for storing a program. The computer readable storage medium can be applied to the terminal or network device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the terminal or network device in the various embodiments of the present application.

[0169] The embodiments of the present application also provide a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal or network device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the terminal or network device in the various embodiments of the present application.

[0170] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided by the embodiments of the present application, and the computer program causes the computer to execute the method performed by the terminal or network device in the various embodiments of the present application.

[0171] It should be understood that the terms "system" and "network" can be used interchangeably in this application. In addition, the terms used in this application are only used to explain the specific embodiments of the application, and are not intended to limit the application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0172] In embodiments of the present application, the term "indicate" can be direct indication or indirect indication, or can represent an associated relationship. For example, A indicates B, which can mean that B can be obtained through A; or A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or A and B have an associated relationship.

[0173] In embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0174] In embodiments of the present application, the term "corresponding" can represent a direct or indirect corresponding relationship between the two, or can represent an associated relationship between the two, or can represent an indication and being indicated, configuration and being configured, and the like.

[0175] In embodiments of the present application, "predefined" or "preconfigured" can be implemented by pre-saving corresponding codes, tables or other information that can be used to indicate related information in devices (such as terminal devices and network devices), and the specific implementation manner of the present application is not limited. For example, predefinition can refer to definition in a protocol.

[0176] In embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, which can include, for example, an LTE protocol, an NR protocol, and a related protocol applied to a future communication system, and the present application is not limited thereto.

[0177] In embodiments of the present application, the term "and / or" is only used to describe the associated relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents an "or" relationship between the front and rear associated objects.

[0178] In the embodiments of the present application, the "comprising" can mean directly comprising or indirectly comprising. Alternatively, the "comprising" mentioned in the embodiments of the present application can be replaced by "indicating" or "for determining". For example, A comprising B can be replaced by A indicating B, or A for determining B.

[0179] In various embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0180] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0181] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the present embodiment.

[0182] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0183] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server, data center and the like integrated with one or more available media sets. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, digital video disc (DVD)) or semiconductor media (for example, solid state disk (SSD)) and the like.

[0184] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, the method comprising: Comprising: The terminal device receives first information sent by the network device; Wherein, the first information comprises one or more of the following: A first parameter, used to indicate the type of network supporting the first service; A second parameter, used to indicate the public land mobile network and / or radio access technology type corresponding to the network supporting the first service; A third parameter, used to indicate whether the network device allows the terminal device to search for other networks in addition to the first network to obtain the first service, the first network being the network corresponding to the network device.

2. The method of claim 1, wherein, The method further comprises: The terminal device searches for a first cell, which is a cell corresponding to the public land mobile network and / or radio access technology type corresponding to the network supporting the first service indicated by the second parameter.

3. The method according to claim 1 or 2, characterized in that, The method further comprises: The terminal device initiates a registration process and / or an attachment process according to a first type of message, the first type being indicated by the first parameter.

4. The method according to any one of claims 1-3, characterized in that, The method further comprises: The terminal device sends second information to the network device; Wherein, the second information is used to indicate the capability of the terminal device to simultaneously maintain and / or use multiple wireless connections.

5. The method of claim 4, wherein, The second information is used to indicate whether the terminal device supports a first capability and / or a second capability, in the case of supporting the first capability, the terminal device supports simultaneously maintaining multiple wireless connections, and in the case of supporting the second capability, the terminal device supports simultaneously transmitting data through multiple wireless connections.

6. The method according to claim 4 or 5, characterized in that, The second information is carried in a registration request message.

7. The method according to any one of claims 1 to 6, characterized in that, The first information is carried in a registration reply message.

8. The method according to any one of claims 1-7, characterized in that, The method further comprises: According to the first information, the terminal device determines whether to select other networks in addition to the first network to perform the first service.

9. The method of claim 8, wherein, In the case that the terminal device supports simultaneously maintaining and / or using multiple wireless connections, and the first network does not support the first service, the terminal device maintains the first network registration state while selecting the other networks to perform the first service.

10. The method according to any one of claims 1-9, characterized in that, The method further comprises: The terminal device sends fourth information to the network device; Wherein, the fourth information is used to indicate that the terminal device selects other networks to perform the first service while maintaining the first network registration state.

11. The method according to any one of claims 1-10, characterized in that, The first service comprises one or more of the following: voice service, vehicle-to-everything service, extended reality service, and emergency call service.

12. A method of wireless communication, the method comprising: Comprising: The network device sends first information to the terminal device; Wherein, the first information comprises one or more of the following: A first parameter, used to indicate the type of network supporting the first service; A second parameter, used to indicate the public land mobile network and / or radio access technology type corresponding to the network supporting the first service; A third parameter, used to indicate whether the network device allows the terminal device to search for other networks in addition to the first network to obtain the first service, the first network being the network corresponding to the network device.

13. The method of claim 12, wherein, The method further comprises: The network device receives second information sent by the terminal device; Wherein, the second information is used to indicate the capability of the terminal device to simultaneously maintain and / or use multiple wireless connections.

14. The method of claim 13, wherein, The second information is used to indicate whether the terminal device supports a first capability and / or a second capability, in the case of supporting the first capability, the terminal device supports maintaining multiple wireless connections simultaneously, and in the case of supporting the second capability, the terminal device supports transmitting data through multiple wireless connections simultaneously.

15. The method according to claim 13 or 14, characterized in that, The second information is carried in a registration request message.

16. The method according to any one of claims 12-15, characterized in that, The first information is carried in a registration reply message.

17. The method according to any one of claims 12-16, characterized by, The method further comprises: The network device determines whether to send the first information based on third information. The third information comprises one or more of the following: The capability of the terminal device to maintain / use multiple wireless connections simultaneously; The user equipment usage type of the terminal device.

18. The method according to any one of claims 12-17, characterized by, The method further comprises: The network device receives fourth information sent by the terminal device. The fourth information is used to indicate that the terminal device selects other networks to perform first services while maintaining the first network registration state.

19. The method according to any one of claims 12-18, characterized by, The first services comprise one or more of the following: voice services, vehicle-to-everything services, extended reality services, and emergency call services.

20. A terminal device, comprising: Comprise: A receiving unit, configured to receive first information sent by a network device. The first information comprises one or more of the following: A first parameter, used to indicate the type of a network supporting first services; A second parameter, used to indicate the public land mobile network and / or radio access technology type corresponding to the network supporting the first services; A third parameter, used to indicate whether the network device allows the terminal device to search for other networks except the first network to obtain the first services, the first network being a network corresponding to the network device.

21. The terminal device of claim 20, wherein, The terminal device is further configured to: Search for a first cell, which is a cell corresponding to the public land mobile network and / or radio access technology type corresponding to the network supporting the first services indicated by the second parameter.

22. The terminal device according to claim 20 or 21, characterized by The terminal device is further configured to: Initiate a registration procedure and / or an attachment procedure according to a first type of message, the first type being indicated by the first parameter.

23. The terminal device of any one of claims 20-22, wherein, The terminal device is further configured to: Send second information to the network device. The second information is used to indicate the capability of the terminal device to maintain and / or use multiple wireless connections simultaneously.

24. The terminal device of claim 23, wherein, The second information is used to indicate whether the terminal device supports a first capability and / or a second capability, in the case of supporting the first capability, the terminal device supports maintaining multiple wireless connections simultaneously, and in the case of supporting the second capability, the terminal device supports transmitting data through multiple wireless connections simultaneously.

25. The terminal device according to claim 23 or 24, characterized by The second information is carried in a registration request message.

26. The terminal device of any one of claims 20-25, wherein, The first information is carried in a registration reply message.

27. The terminal device of any one of claims 20-26, wherein, The terminal device is further configured to: Determine whether to select other networks except the first network to perform the first services according to the first information.

28. The terminal device of claim 27, wherein, In the case of the terminal device supporting maintaining and / or using multiple wireless connections simultaneously and the first network not supporting the first services, the terminal device selects the other networks to perform the first services while maintaining the first network registration state.

29. The terminal device of any one of claims 20-28, wherein, The terminal device is further configured to: Send fourth information to a network device. The fourth information is used to indicate that the terminal device selects other network to perform first service in the case of maintaining the first network registration state.

30. The terminal device of any one of claims 20-29, wherein, The first service includes one or more of the following: voice service, vehicle-to-everything service, extended reality service, and emergency call service.

31. A network device, comprising: The method comprises the following steps: The sending unit is configured to send first information to the terminal device. The first information includes one or more of the following: The first parameter is used to indicate the type of network supporting the first service. The second parameter is used to indicate the public land mobile network and / or radio access technology type corresponding to the network supporting the first service. The third parameter is used to indicate whether the network device allows the terminal device to search for other network except the first network to obtain the first service, the first network being the network corresponding to the network device.

32. The network device of claim 31, wherein, The network device is further configured to: The network device receives second information sent by the terminal device. The second information is used to indicate the capability of the terminal device in maintaining and / or using multiple wireless connections simultaneously.

33. The network device of claim 32, wherein, The second information is used to indicate whether the terminal device supports a first capability and / or a second capability, wherein, in the case of supporting the first capability, the terminal device supports maintaining multiple wireless connections simultaneously, and in the case of supporting the second capability, the terminal device supports transmitting data through multiple wireless connections simultaneously.

34. The network device of claim 32 or 33, wherein, The second information is carried in a registration request message.

35. The network device of any of claims 31-34, wherein, The first information is carried in a registration reply message.

36. The network device of any of claims 32-35, wherein, The network device is further configured to: The network device determines whether to send the first information based on third information. The third information includes one or more of the following: The capability of the terminal device in maintaining / using multiple wireless connections simultaneously. The user equipment usage type of the terminal device.

37. The network device of any of claims 31-36, wherein, The network device is further configured to: The network device receives fourth information sent by the terminal device. The fourth information is used to indicate that the terminal device selects other network to perform first service in the case of maintaining the first network registration state.

38. The network device of any of claims 31-37, wherein, The first service includes one or more of the following: voice service, vehicle-to-everything service, extended reality service, and emergency call service.

39. A terminal device, comprising: The terminal device comprises a transceiver, a memory, and a processor, wherein the memory is configured to store a program, the processor is configured to invoke the program in the memory and control the transceiver to receive or send signals, so that the terminal device performs the method in any one of claims 1-11.

40. A network device, comprising: The network device comprises a transceiver, a memory, and a processor, wherein the memory is configured to store a program, the processor is configured to invoke the program in the memory and control the transceiver to receive or send signals, so that the network device performs the method in any one of claims 12-19.

41. An apparatus comprising: The apparatus comprises a processor configured to invoke a program from a memory, so that the apparatus performs the method in any one of claims 1-19.

42. A chip, comprising: The chip comprises a processor configured to invoke a program from a memory, so that the device installed with the chip performs the method in any one of claims 1-19.

43. A computer-readable storage medium, comprising: The computer program is stored in the computer-readable storage medium, and the computer program causes the computer to perform the method in any one of claims 1-19.

44. A computer program product, characterised in that, comprising a program causing a computer to perform the method of any one of claims 1-19.

45. A computer program, characterized in that, The computer program causes a computer to perform the method of any one of claims 1-19.

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