WO2025054797A1

WO2025054797A1 - Communication method and apparatus, communication device, communication system, and storage medium

Info

Publication number: WO2025054797A1
Application number: PCT/CN2023/118123
Authority: WO
Inventors: 刘淑勇; 王志宇; 李想; 饶晓环
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2025-03-20
Anticipated expiration: 2026-03-11
Also published as: CN117441379A

Abstract

The present disclosure provides a communication method and apparatus, a device, and a storage medium. The communication method comprises: when a terminal accesses a first network by using Non-3GPP, the terminal receives at least one of first information, second information, third information, or fourth information, wherein the first information, the second information, the third information, and the fourth information respectively indicate whether a network device supports a first handover, a second handover, a third handover, or a fourth handover; the first handover comprises: the terminal is handed over from accessing the first network by using the Non-3GPP to accessing the first network by using 3GPP; the second handover comprises: the terminal is handed over from accessing the first network by using the Non-3GPP to accessing a second network by using 3GPP, the second network being a network other than the first network; the third handover comprises: the terminal is handed over from accessing the second network by using the Non-3GPP to accessing the first network by using 3GPP; and the fourth handover comprises: the terminal is handed over from accessing the second network by using the Non-3GPP to accessing the second network by using 3GPP. The present disclosure improves the success rate of switching from a Non-3GPP access technology to a 3GPP access technology, and ensures the communication quality.

Description

Communication method and device, communication equipment, communication system, and storage medium

Technical Field

本公开涉及通信技术领域，尤其涉及通信方法及装置、通信设备、通信系统、存储介质。The present disclosure relates to the field of communication technology, and in particular to communication methods and devices, communication equipment, communication systems, and storage media.

Background Art

通信系统中，终端可以通过第三代合作伙伴计划(The 3rd Generation Partnership Project，3GPP)接入技术接入至网络，也可以通过非第三代合作伙伴计划(Non The 3rd Generation Partnership Project，Non-3GPP)接入技术接入至网络。In the communication system, the terminal can access the network through the 3rd Generation Partnership Project (3GPP) access technology, or through the non-3rd Generation Partnership Project (Non-3GPP) access technology.

发明内容Summary of the invention

本公开提出通信方法及装置、通信设备、通信系统、存储介质。The present disclosure provides a communication method and apparatus, a communication device, a communication system, and a storage medium.

根据本公开实施例的第一方面，提出了一种通信方法，包括：According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, including:

终端使用非第三代合作伙伴计划Non-3GPP接入技术接入第一网络时，所述终端接收网络设备发送的第一信息、第二信息、第三信息、第四信息中的至少之一；When the terminal accesses the first network using a non-3GPP access technology, the terminal receives at least one of the first information, the second information, the third information, and the fourth information sent by the network device;

其中，所述第一信息用于指示所述网络设备是否支持所述终端执行第一切换；所述第一切换包括：所述终端从使用Non-3GPP接入技术接入第一网络切换至使用3GPP接入技术接入第一网络；The first information is used to indicate whether the network device supports the terminal to perform a first handover; the first handover includes: the terminal switches from accessing the first network using a Non-3GPP access technology to accessing the first network using a 3GPP access technology;

所述第二信息用于指示所述网络设备是否支持所述终端执行第二切换；所述第二切换包括：所述终端从使用Non-3GPP接入技术接入第一网络切换至使用3GPP接入技术接入第二网络，所述第二网络为除所述第一网络之外的网络；The second information is used to indicate whether the network device supports the terminal to perform a second handover; the second handover includes: the terminal switches from accessing a first network using a Non-3GPP access technology to accessing a second network using a 3GPP access technology, and the second network is a network other than the first network;

所述第三信息用于指示所述网络设备是否支持所述终端执行第三切换；所述第三切换包括：所述终端从使用Non-3GPP接入技术接入第二网络切换至使用3GPP接入技术接入第一网络；The third information is used to indicate whether the network device supports the terminal to perform a third handover; the third handover includes: the terminal switches from accessing the second network using the Non-3GPP access technology to accessing the first network using the 3GPP access technology;

所述第四信息用于指示所述网络设备是否支持所述终端执行第四切换；所述第四切换包括：所述终端从使用Non-3GPP接入技术接入第二网络切换至使用3GPP接入技术接入第二网络。The fourth information is used to indicate whether the network device supports the terminal to perform a fourth handover; the fourth handover includes: the terminal switches from accessing the second network using the Non-3GPP access technology to accessing the second network using the 3GPP access technology.

根据本公开实施例的第二方面，提出了一种通信方法，包括：According to a second aspect of an embodiment of the present disclosure, a communication method is proposed, including:

终端使用Non-3GPP接入技术接入第一网络时，所述网络设备向终端发送第一信息、第二信息、第三信息、第四信息中的至少之一；When the terminal accesses the first network using the Non-3GPP access technology, the network device sends at least one of the first information, the second information, the third information, and the fourth information to the terminal;

根据本公开实施例的第三方面，提出了一种通信方法，用于通信系统，所述通信系统包括终端、网络设备，所述方法包括以下至少之一：According to a third aspect of an embodiment of the present disclosure, a communication method is provided for use in a communication system, wherein the communication system includes a terminal and a network device, and the method includes at least one of the following:

终端使用Non-3GPP接入技术接入第一网络时，所述终端接收网络设备发送的第一信息、第二信息、第三信息、第四信息中的至少之一；When the terminal accesses the first network using the Non-3GPP access technology, the terminal receives at least one of the first information, the second information, the third information, and the fourth information sent by the network device;

所述第三信息用于指示所述网络设备是否支持所述终端执行第三切换；所述第三切换包括：所述终端从使用Non-3GPP接入技术接入第二网络切换至使用3GPP接入技术接入第一网络； The third information is used to indicate whether the network device supports the terminal to perform a third handover; the third handover includes: the terminal switches from accessing the second network using the Non-3GPP access technology to accessing the first network using the 3GPP access technology;

根据本公开实施例的第四方面，提出了一种终端，包括：According to a fourth aspect of an embodiment of the present disclosure, a terminal is provided, including:

接收模块，用于终端使用Non-3GPP接入技术接入第一网络时，接收网络设备发送的第一信息、第二信息、第三信息、第四信息中的至少之一；A receiving module, configured to receive at least one of first information, second information, third information, and fourth information sent by a network device when the terminal accesses the first network using a Non-3GPP access technology;

根据本公开实施例的第五方面，提出了一种网络设备，包括：According to a fifth aspect of an embodiment of the present disclosure, a network device is provided, including:

发送模块，用于终端使用Non-3GPP接入技术接入第一网络时，向终端发送第一信息、第二信息、第三信息、第四信息中的至少之一；a sending module, configured to send at least one of the first information, the second information, the third information, and the fourth information to the terminal when the terminal accesses the first network using the Non-3GPP access technology;

根据本公开实施例的第六方面，提出了一种通信设备，包括：According to a sixth aspect of an embodiment of the present disclosure, a communication device is provided, including:

一个或多处理器；One or more processors;

其中，所述处理器用于调用指令以使得所述通信设备执行第一方面或第二方面所述的通信方法。The processor is used to call instructions so that the communication device executes the communication method described in the first aspect or the second aspect.

根据本公开实施例的第七方面，提出了一种通信系统，其特征在于，包括终端、网络设备，其中，所述终端被配置为实现第一方面所述的通信方法，所述网络设备被配置为实现第二方面所述的通信方法。According to the seventh aspect of an embodiment of the present disclosure, a communication system is proposed, characterized in that it includes a terminal and a network device, wherein the terminal is configured to implement the communication method described in the first aspect, and the network device is configured to implement the communication method described in the second aspect.

根据本公开实施例的第八方面，提出了一种存储介质，所述存储介质存储有指令，其特征在于，当所述指令在通信设备上运行时，使得所述通信设备执行如第一方面或第二方面所述的通信方法。According to an eighth aspect of an embodiment of the present disclosure, a storage medium is proposed, wherein the storage medium stores instructions, and is characterized in that when the instructions are executed on a communication device, the communication device executes the communication method described in the first aspect or the second aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

本公开上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解，其中：The above and/or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

图1为本公开实施例提供的一些通信系统的架构示意图；FIG1 is a schematic diagram of the architecture of some communication systems provided by embodiments of the present disclosure;

图2A-2C为本公开一个实施例所提供的通信方法的交互示意图；2A-2C are interactive schematic diagrams of a communication method provided by an embodiment of the present disclosure;

图3A-3D为本公开再一个实施例所提供的通信方法的流程示意图；3A-3D are flowchart diagrams of a communication method provided in yet another embodiment of the present disclosure;

图4A-4C为本公开再一个实施例所提供的通信方法的流程示意图；4A-4C are flowchart diagrams of a communication method provided in yet another embodiment of the present disclosure;

图5A为本公开再一个实施例所提供的通信方法的流程示意图；FIG5A is a flow chart of a communication method provided by yet another embodiment of the present disclosure;

图5B是根据本公开实施例示出的切换能力信息的交互示意图；FIG5B is a schematic diagram showing the interaction of switching capability information according to an embodiment of the present disclosure;

图5C是根据本公开实施例示出的通信方法的交互示意图；FIG5C is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure;

图6A为本公开一个实施例所提供的终端的结构示意图；FIG6A is a schematic diagram of the structure of a terminal provided by an embodiment of the present disclosure;

图6B为本公开一个实施例所提供的网络设备的结构示意图；FIG6B is a schematic diagram of the structure of a network device provided by an embodiment of the present disclosure;

图7A是本公开一个实施例所提供的一种通信设备的结构示意图；FIG7A is a schematic diagram of the structure of a communication device provided by an embodiment of the present disclosure;

图7B为本公开一个实施例所提供的一种芯片的结构示意图。 FIG. 7B is a schematic diagram of the structure of a chip provided by an embodiment of the present disclosure.

DETAILED DESCRIPTION

本公开实施例提出了通信方法及装置、通信设备、通信系统、存储介质。The embodiments of the present disclosure provide a communication method and apparatus, a communication device, a communication system, and a storage medium.

第一方面，本公开实施例提出了一种通信方法，由终端执行，所述方法包括：In a first aspect, an embodiment of the present disclosure provides a communication method, which is executed by a terminal, and the method includes:

在上述实施例中，当终端使用Non-3GPP接入技术接入第一网络时，网络设备会向终端发送第一信息、第二信息、第三信息、第四信息中的至少之一，其中，第一信息用于指示终端是否支持从使用Non-3GPP接入技术接入第一网络切换至使用3GPP接入技术接入第一网络，该第二信息用于指示终端是否支持从使用Non-3GPP接入技术接入第一网络切换至使用3GPP接入技术接入第二网络，第三信息用于指示终端是否支持从使用Non-3GPP接入技术接入第二网络切换至使用3GPP接入技术接入第一网络，该第四信息用于指示终端是否支持从使用Non-3GPP接入技术接入第二网络切换至使用3GPP接入技术接入第二网络。由此可知，网络设备会通过向终端发送第一信息、第二信息、第三信息、第四信息中的至少之一，来向终端告知该网络设备对于“从Non-3GPP接入技术切换至3GPP接入技术”这一流程的支持情况，以便于终端可以知晓网络设备的切换能力，该切换能力即为：网络设备是否支持“从Non-3GPP接入技术切换至3GPP接入技术”，由此，当终端当前使用Non-3GPP接入技术接入网络时，若终端确定当前需要切换至3GPP接入技术，则终端可以参考网络设备的切换能力来确定终端当前是否要执行“从Non-3GPP接入技术切换至3GPP接入技术”这一流程，其中，当网络设备支持“从Non-3GPP接入技术切换至3GPP接入技术”时，终端会确定执行“从Non-3GPP接入技术切换至3GPP接入技术”这一流程，否则，终端会确定不执行“从Non-3GPP接入技术切换至3GPP接入技术”这一流程，从而可以避免出现“由于终端无法知晓其当前接入的网络的切换能力，而导致在终端当前接入的网络不支持“从Non-3GPP接入技术切换至3GPP接入技术”时，终端确定执行了从Non-3GPP接入技术切换至3GPP接入技术这一流程，而造成切换失败，从而导致掉话，承载断链”的情况，提高了从Non-3GPP接入技术切换至3GPP接入技术的成功率，确保了通信质量。In the above embodiment, when the terminal uses Non-3GPP access technology to access the first network, the network device will send at least one of the first information, the second information, the third information, and the fourth information to the terminal, wherein the first information is used to indicate whether the terminal supports switching from accessing the first network using Non-3GPP access technology to accessing the first network using 3GPP access technology, the second information is used to indicate whether the terminal supports switching from accessing the first network using Non-3GPP access technology to accessing the second network using 3GPP access technology, the third information is used to indicate whether the terminal supports switching from accessing the second network using Non-3GPP access technology to accessing the first network using 3GPP access technology, and the fourth information is used to indicate whether the terminal supports switching from accessing the second network using Non-3GPP access technology to accessing the second network using 3GPP access technology. It can be seen that the network device will inform the terminal of the support status of the network device for the process of "switching from Non-3GPP access technology to 3GPP access technology" by sending at least one of the first information, the second information, the third information, and the fourth information to the terminal, so that the terminal can know the switching capability of the network device, and the switching capability is: whether the network device supports "switching from Non-3GPP access technology to 3GPP access technology". Therefore, when the terminal currently uses Non-3GPP access technology to access the network, if the terminal determines that it needs to switch to 3GPP access technology, the terminal can refer to the switching capability of the network device to determine whether the terminal currently needs to perform the process of "switching from Non-3GPP access technology to 3GPP access technology". Among them, when the network device supports "switching from Non-3GPP access technology to 3GPP access technology", the terminal can determine whether the terminal currently needs to perform the process of "switching from Non-3GPP access technology to 3GPP access technology". -3GPP access technology to 3GPP access technology", the terminal will determine to execute the process of "switching from Non-3GPP access technology to 3GPP access technology", otherwise, the terminal will determine not to execute the process of "switching from Non-3GPP access technology to 3GPP access technology", thereby avoiding the situation of "because the terminal cannot know the switching capability of the network it is currently accessing, resulting in the terminal currently accessing The network does not support "switching from Non-3GPP access technology to 3GPP access technology", the terminal determines to execute the process of switching from Non-3GPP access technology to 3GPP access technology, resulting in switching failure, resulting in dropped calls and bearer disconnection", thereby improving the success rate of switching from Non-3GPP access technology to 3GPP access technology and ensuring communication quality.

结合第一方面的一些实施例，在一些实施例中，所述第一网络为第五代移动通信系统5G网络，所述5G网络包括5G核心网5GCN；In conjunction with some embodiments of the first aspect, in some embodiments, the first network is a fifth generation mobile communication system 5G network, and the 5G network includes a 5G core network 5GCN;

所述第二网络为第四代移动通信系统4G网络，所述4G网络包括4G核心网EPC。The second network is a fourth generation mobile communication system 4G network, and the 4G network includes a 4G core network EPC.

结合第一方面的一些实施例，在一些实施例中，所述第一网络为4G网络，所述4G网络包括4G核心网EPC；In conjunction with some embodiments of the first aspect, in some embodiments, the first network is a 4G network, and the 4G network includes a 4G core network EPC;

所述第二网络为5G网络，所述5G网络包括5G核心网5GCN。The second network is a 5G network, and the 5G network includes a 5G core network 5GCN.

在上述实施例中，本公开的方法可以适用于当终端使用3GPP接入技术接入4G网络或5G网络时的情形，则适用范围较广。In the above embodiments, the method disclosed herein can be applicable to the situation when the terminal uses 3GPP access technology to access a 4G network or a 5G network, and has a wider scope of application.

结合第一方面的一些实施例，在一些实施例中，所述方法还包括以下至少之一：In combination with some embodiments of the first aspect, in some embodiments, the method further includes at least one of the following:

所述第一信息指示所述网络设备支持所述终端执行第一切换，和/或，所述第二信息指示所述网络设备支持所述终端执行第二切换，当所述终端需要通过3GPP接入技术接入网络时，所述终端执行所述第一切换或所述第二切换；The first information indicates that the network device supports the terminal to perform a first handover, and/or the second information indicates that the network device supports the terminal to perform a second handover, and when the terminal needs to access the network through a 3GPP access technology, the terminal performs the first handover or the second handover;

所述第一信息指示所述网络设备不支持所述终端执行第一切换、所述第二信息指示所述网络设备不支持所述终端执行第二切换，若所述终端处于空闲态，当所述终端需要通过3GPP接入技术接入网络时，所述终端去注册所述第一网络，并通过3GPP接入技术重注册至第一网络或第二网络；The first information indicates that the network device does not support the terminal to perform the first switching, and the second information indicates that the network device does not support The terminal performs a second handover, if the terminal is in an idle state, when the terminal needs to access a network through a 3GPP access technology, the terminal deregisters the first network, and reregisters to the first network or the second network through the 3GPP access technology;

所述第一信息指示所述网络设备不支持所述终端执行第一切换、所述第二信息指示所述网络设备不支持所述终端执行第二切换，并且，当所述第三信息指示所述网络设备支持所述终端执行第三切换，和/或，所述第四信息指示所述网络设备支持所述终端执行第四切换时，若所述终端处于连接态，所述终端使用Non-3GPP接入技术切换接入至所述第二网络，并当所述终端需要通过3GPP接入技术接入网络时，所述终端执行所述第三切换或所述第四切换The first information indicates that the network device does not support the terminal to perform a first handover, the second information indicates that the network device does not support the terminal to perform a second handover, and when the third information indicates that the network device supports the terminal to perform a third handover, and/or the fourth information indicates that the network device supports the terminal to perform a fourth handover, if the terminal is in a connected state, the terminal uses the Non-3GPP access technology to switch access to the second network, and when the terminal needs to access the network through the 3GPP access technology, the terminal performs the third handover or the fourth handover

所述第一信息指示所述网络设备不支持所述终端执行第一切换、所述第二信息指示所述网络设备不支持所述终端执行第二切换、所述第三信息指示所述网络设备不支持所述终端执行第三切换、所述第四信息指示所述网络设备不支持所述终端执行第四切换，若所述终端处于连接态，当所述终端需要通过3GPP接入技术接入网络时，所述终端去注册所述第一网络并通过3GPP接入技术重注册至第一网络或第二网络，和/或，降低第一业务的优先级，所述第一业务为使用Non-3GPP接入技术接入第一网络或第二网络时所执行的业务。The first information indicates that the network device does not support the terminal to execute the first switching, the second information indicates that the network device does not support the terminal to execute the second switching, the third information indicates that the network device does not support the terminal to execute the third switching, and the fourth information indicates that the network device does not support the terminal to execute the fourth switching. If the terminal is in a connected state, when the terminal needs to access the network through 3GPP access technology, the terminal registers with the first network and re-registers to the first network or the second network through 3GPP access technology, and/or reduces the priority of the first service, which is the service executed when accessing the first network or the second network using Non-3GPP access technology.

结合第一方面的一些实施例，在一些实施例中，所述第一业务包括基于无线保真网络的语音VoWiFi业务。In combination with some embodiments of the first aspect, in some embodiments, the first service includes a voice VoWiFi service based on a wireless fidelity network.

在上述实施例中，提供了一种终端如何基于第一信息、第二信息、第三信息、第四信息中的至少之一来确定是否要执行第一切换、第二切换、第三切换、第四切换的方法，以便终端可以成功执行第一切换、第二切换、第三切换、第四切换，而避免出现“网络设备不支持第一切换、第二切换、第三切换、第四切换时，终端执行了第一切换、第二切换、第三切换、第四切换”的情况，确保了第一切换、第二切换、第三切换、第四切换的成功率，提高了从Non-3GPP接入技术切换至3GPP接入技术的成功率，确保了通信质量。并且，在上述实施例中，当第一信息指示网络设备不支持终端执行第一切换、第二信息指示网络设备不支持终端执行第二切换、第三信息指示网络设备不支持第三切换、第四信息指示网络设备不支持第四切换时，若终端需要通过3GPP接入技术接入网络时，还提供了一种终端的处理方法，即：终端可以去注册第一网络并通过3GPP接入技术重注册至第一网络或第二网络，和/或，终端可以降低第一业务的优先级，该第一业务为使用Non-3GPP接入技术接入第一网络或第二网络时所执行的业务。由此提供了一种当网络设备不支持第一切换、第二切换、第三切换、第四切换时，若终端目前需要通过3GPP接入技术接入网络，终端具体如何使用3GPP接入技术接入网络的方法，确保了终端在需要通过3GPP接入技术接入网络时，可以及时地通过3GPP接入技术接入网络，保证了通信质量。In the above embodiment, a method is provided for a terminal to determine whether to perform a first handover, a second handover, a third handover, or a fourth handover based on at least one of the first information, the second information, the third information, and the fourth information, so that the terminal can successfully perform the first handover, the second handover, the third handover, and the fourth handover, and avoid the situation where "the terminal performs the first handover, the second handover, the third handover, and the fourth handover when the network device does not support the first handover, the second handover, the third handover, and the fourth handover", thereby ensuring the success rate of the first handover, the second handover, the third handover, and the fourth handover, improving the success rate of switching from Non-3GPP access technology to 3GPP access technology, and ensuring communication quality. Furthermore, in the above embodiment, when the first information indicates that the network device does not support the terminal to perform the first handover, the second information indicates that the network device does not support the terminal to perform the second handover, the third information indicates that the network device does not support the third handover, and the fourth information indicates that the network device does not support the fourth handover, if the terminal needs to access the network through the 3GPP access technology, a terminal processing method is also provided, that is, the terminal can deregister the first network and reregister to the first network or the second network through the 3GPP access technology, and/or the terminal can reduce the priority of the first service, which is the service executed when the Non-3GPP access technology is used to access the first network or the second network. Thus, a method is provided for how the terminal specifically uses the 3GPP access technology to access the network when the network device does not support the first handover, the second handover, the third handover, and the fourth handover, if the terminal currently needs to access the network through the 3GPP access technology, so as to ensure that the terminal can access the network through the 3GPP access technology in a timely manner when it needs to access the network through the 3GPP access technology, thereby ensuring the communication quality.

第二方面，本公开实施例提出了一种通信方法，由网络设备执行，所述方法包括以下至少之一：In a second aspect, an embodiment of the present disclosure provides a communication method, which is performed by a network device, and the method includes at least one of the following:

第三方面，本公开实施例提出了一种通信方法，用于通信系统，所述通信系统包括终端、网络设备，所述方法包括以下至少之一：In a third aspect, an embodiment of the present disclosure provides a communication method for a communication system, wherein the communication system includes a terminal and a network device, and the method includes at least one of the following:

第四方面，本公开实施例提出了一种终端，包括：In a fourth aspect, an embodiment of the present disclosure provides a terminal, including:

结合第四方面的一些实施例，在一些实施例中，所述第一网络为第五代移动通信系统5G网络，所述 5G网络包括5G核心网5GCN；In conjunction with some embodiments of the fourth aspect, in some embodiments, the first network is a fifth generation mobile communication system 5G network, The 5G network includes the 5G core network 5GCN;

结合第四方面的一些实施例，在一些实施例中，所述第一网络为4G网络，所述4G网络包括4G核心网EPC；In conjunction with some embodiments of the fourth aspect, in some embodiments, the first network is a 4G network, and the 4G network includes a 4G core network EPC;

结合第四方面的一些实施例，在一些实施例中，所述终端还用于以下至少之一：In conjunction with some embodiments of the fourth aspect, in some embodiments, the terminal is further used for at least one of the following:

所述第一信息指示所述网络设备不支持所述终端执行第一切换、所述第二信息指示所述网络设备不支持所述终端执行第二切换，若所述终端处于空闲态，当所述终端需要通过3GPP接入技术接入网络时，所述终端去注册所述第一网络，并通过3GPP接入技术重注册至第一网络或第二网络；The first information indicates that the network device does not support the terminal to perform the first handover, and the second information indicates that the network device does not support the terminal to perform the second handover. If the terminal is in an idle state, when the terminal needs to access the network through the 3GPP access technology, the terminal registers the first network and re-registers to the first network or the second network through the 3GPP access technology;

所述第一信息指示所述网络设备不支持所述终端执行第一切换、所述第二信息指示所述网络设备不支持所述终端执行第二切换，并且，当所述第三信息指示所述网络设备支持所述终端执行第三切换，和/或，所述第四信息指示所述网络设备支持所述终端执行第四切换时，若所述终端处于连接态，所述终端使用Non-3GPP接入技术切换接入至所述第二网络，并当所述终端需要通过3GPP接入技术接入网络时，所述终端执行所述第三切换或所述第四切换；The first information indicates that the network device does not support the terminal to perform a first handover, and the second information indicates that the network device does not support the terminal to perform a second handover, and when the third information indicates that the network device supports the terminal to perform a third handover, and/or the fourth information indicates that the network device supports the terminal to perform a fourth handover, if the terminal is in a connected state, the terminal uses a Non-3GPP access technology to switch access to the second network, and when the terminal needs to access the network through a 3GPP access technology, the terminal performs the third handover or the fourth handover;

结合第四方面的一些实施例，在一些实施例中，所述第一业务包括基于无线保真网络的语音VoWiFi业务。In combination with some embodiments of the fourth aspect, in some embodiments, the first service includes a voice VoWiFi service based on a wireless fidelity network.

第五方面，本公开实施例提出了一种网络设备，包括：In a fifth aspect, an embodiment of the present disclosure provides a network device, including:

结合第五方面的一些实施例，在一些实施例中，所述第一网络为第五代移动通信系统5G网络，所述5G网络包括5G核心网5GCN；In conjunction with some embodiments of the fifth aspect, in some embodiments, the first network is a fifth generation mobile communication system 5G network, and the 5G network includes a 5G core network 5GCN;

结合第五方面的一些实施例，在一些实施例中，所述第一网络为4G网络，所述4G网络包括4G核心网EPC；In conjunction with some embodiments of the fifth aspect, in some embodiments, the first network is a 4G network, and the 4G network includes a 4G core network EPC;

第六方面，本公开实施例提出了通信设备，上述通信设备包括：一个或多个处理器；用于存储指令的一个或多个存储器；其中，上述处理器用于调用上述指令以使得上述通信设备执行如第一方面、第一方面的可选实现方式、第二方面、第二方面的可选实现方式所描述的通信方法。 In a sixth aspect, an embodiment of the present disclosure proposes a communication device, wherein the communication device includes: one or more processors; one or more memories for storing instructions; wherein the processor is used to call the instructions so that the communication device executes the communication method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

第七方面，本公开实施例提出了通信系统，上述通信系统包括：终端、网络设备；其中，上述终端被配置为执行如第一方面和第一方面的可选实现方式所描述的方法，上述网络设备被配置为执行如第二方面和第二方面的可选实现方式所描述的方法。In the seventh aspect, an embodiment of the present disclosure proposes a communication system, which includes: a terminal and a network device; wherein the terminal is configured to execute the method described in the first aspect and the optional implementation of the first aspect, and the network device is configured to execute the method described in the second aspect and the optional implementation of the second aspect.

第八方面，本公开实施例提出了存储介质，上述存储介质存储有指令，当上述指令在通信设备上运行时，使得上述通信设备执行如第一方面、第一方面的可选实现方式、第二方面、第二方面的可选实现方式所描述的通信方法。In an eighth aspect, an embodiment of the present disclosure proposes a storage medium, wherein the storage medium stores instructions. When the instructions are executed on a communication device, the communication device executes the communication method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

第九方面，本公开实施例提出了程序产品，上述程序产品被通信设备执行时，使得上述通信设备执行如第一方面、第一方面的可选实现方式、第二方面、第二方面的可选实现方式所描述的通信方法。In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the communication method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

第十方面，本公开实施例提出了计算机程序，当其在计算机上运行时，使得计算机执行如第一方面、第一方面的可选实现方式、第二方面、第二方面的可选实现方式所描述的通信方法。In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the communication method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

可以理解地，上述终端、网络设备、通信设备、通信系统、存储介质、程序产品、计算机程序均用于执行本公开实施例所提出的方法。因此，其所能达到的有益效果可以参考对应方法中的有益效果，此处不再赘述。It is understandable that the above-mentioned terminals, network devices, communication devices, communication systems, storage media, program products, and computer programs are all used to execute the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods, which will not be repeated here.

本公开实施例提出了发明名称。在一些实施例中，通信方法与信息处理方法、信息发送方法、信息接收方法等术语可以相互替换，通信装置与信息处理装置、信息发送装置、信息接收装置等术语可以相互替换，信息处理系统、通信系统、信息发送系统、信息接收系统等术语可以相互替换。The present disclosure proposes the title of the invention. In some embodiments, the terms such as communication method and information processing method, information sending method, information receiving method, etc. can be replaced with each other, the terms such as communication device and information processing device, information sending device, information receiving device, etc. can be replaced with each other, and the terms such as information processing system, communication system, information sending system, information receiving system, etc. can be replaced with each other.

本公开实施例并非穷举，仅为部分实施例的示意，不作为对本公开保护范围的具体限制。在不矛盾的情况下，某一实施例中的每个步骤均可以作为独立实施例来实施，且各步骤之间可以任意组合，例如，在某一实施例中去除部分步骤后的方案也可以作为独立实施例来实施，且在某一实施例中各步骤的顺序可以任意交换，另外，某一实施例中的可选实现方式可以任意组合；此外，各实施例之间可以任意组合，例如，不同实施例的部分或全部步骤可以任意组合，某一实施例可以与其他实施例的可选实现方式任意组合。The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

在各本公开实施例中，如果没有特殊说明以及逻辑冲突，各实施例之间的术语和/或描述具有一致性，且可以互相引用，不同实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and/or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

本公开实施例中所使用的术语只是为了描述特定实施例的目的，而并非作为对本公开的限制。The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

在本公开实施例中，除非另有说明，以单数形式表示的元素，如“一个”、“一种”、“该”、“上述”、“所述”、“前述”、“这一”等，可以表示“一个且只有一个”，也可以表示“一个或多个”、“至少一个”等。例如，在翻译中使用如英语中的“a”、“an”、“the”等冠词(article)的情况下，冠词之后的名词可以理解为单数表达形式，也可以理解为复数表达形式。In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

在本公开实施例中，“多个”是指两个或两个以上。In the embodiments of the present disclosure, “plurality” refers to two or more.

在一些实施例中，“至少一者(at least one of)”、“至少一项(at least one of)”、“至少一个(at least one of)”、“一个或多个(one or more)”、“多个(a plurality of)”、“多个(multiple)等术语可以相互替换。In some embodiments, the terms "at least one of", "at least one of", "at least one of", "one or more", "a plurality of", "multiple", etc. can be used interchangeably.

本公开实施例中的如“A、B、C……中的至少一者”、“A和/或B和/或C……”等描述方式，包括了A、B、C……中任意一个单独存在的情况，也包括了A、B、C……中任意多个的任意组合情况，每种情况可以单独存在；例如，“A、B、C中的至少一者”包括单独A、单独B、单独C、A和B组合、A和C组合、B和C组合、A和B和C组合的情况；例如，A和/或B包括单独A、单独B、A和B的组合的情况。In the embodiments of the present disclosure, descriptions such as “at least one of A, B, C…”, “A and/or B and/or C…”, etc. include the case where any one of A, B, C… exists alone, and also include any combination of any multiple of A, B, C…, and each case may exist alone; for example, “at least one of A, B, C” includes the case where A exists alone, B exists alone, C exists alone, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C; for example, A and/or B includes the case where A exists alone, B exists alone, and the combination of A and B.

在一些实施例中，“在一情况下A，在另一情况下B”、“响应于一情况A，响应于另一情况B”等记载方式，根据情况可以包括以下技术方案：与B无关地执行A，即，在一些实施例中A；与A无关地执行B，即，在一些实施例中B；A和B被选择性执行，即，在一些实施例中从A与B中选择执行；A和B都被执行，即，在一些实施例中A和B。当有A、B、C等更多分支时也类似上述。In some embodiments, the description methods such as "in one case A, in another case B", "in response to one case A, in response to another case B", etc. may include the following technical solutions according to the situation: A is executed independently of B, that is, in some embodiments A; B is executed independently of A, that is, in some embodiments B; A and B are selectively executed, that is, selected from A and B in some embodiments; A and B are both executed, that is, A and B in some embodiments. When there are more branches such as A, B, C, etc., it is similar to the above.

本公开实施例中的“第一”、“第二”等前缀词，仅仅为了区分不同的描述对象，不对描述对象的位置、顺序、优先级、数量或内容等构成限制，对描述对象的陈述参见权利要求或实施例中上下文的描述，不应因为使用前缀词而构成多余的限制。例如，描述对象为“字段”，则“第一字段”和“第二字段”中“字段”之前的序数词并不限制“字段”之间的位置或顺序，“第一”和“第二”并不限制其修饰的“字段”是否在同一个消息中，也不限制“第一字段”和“第二字段”的先后顺序。再如，描述对象为“等级”，则“第一等级”和“第二等级”中“等级”之前的序数词并不限制“等级”之间的优先级。再如，描述对象的数量并不受序数词的限制，可以是一个或者多个，以“第一装置”为例，其中“装置”的数量可以是一个或者多个。此外，不同前缀词修饰的对象可以相同或不同，例如，描述对象为“装置”，则“第一装置”和“第二装置”可以是相同的装置或者不同的装置，其类型可以相同或不同；再如，描述对象为“信息”，则“第一信息”和“第二信息”可以是相同的信息或者不同的信息，其内容可以相同或不同。The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute any restrictions on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restrictions should be imposed due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by ordinal numbers and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, different prefixes modify The objects may be the same or different. For example, if the description object is “device”, then the “first device” and the “second device” may be the same device or different devices, and their types may be the same or different. For another example, if the description object is “information”, then the “first information” and the “second information” may be the same information or different information, and their contents may be the same or different.

在一些实施例中，“包括A”、“包含A”、“用于指示A”、“携带A”，可以解释为直接携带A，也可以解释为间接指示A。In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

在一些实施例中，“响应于……”、“响应于确定……”、“在……的情况下”、“在……时”、“当……时”、“若……”、“如果……”等术语可以相互替换。In some embodiments, terms such as "in response to ...", "in response to determining ...", "in the case of ...", "at the time of ...", "when ...", "if ...", "if ...", etc. can be used interchangeably.

在一些实施例中，“大于”、“大于或等于”、“不小于”、“多于”、“多于或等于”、“不少于”、“高于”、“高于或等于”、“不低于”、“以上”等术语可以相互替换，“小于”、“小于或等于”、“不大于”、“少于”、“少于或等于”、“不多于”、“低于”、“低于或等于”、“不高于”、“以下”等术语可以相互替换。In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

在一些实施例中，装置等可以解释为实体的、也可以解释为虚拟的，其名称不限定于实施例中所记载的名称，“装置”、“设备(equipment)”、“设备(device)”、“电路”、“网元”、“节点”、“功能”、“单元”、“部件(section)”、“系统”、“网络”、“芯片”、“芯片系统”、“实体”、“主体”等术语可以相互替换。In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

在一些实施例中，“网络”可以解释为网络中包含的装置(例如，接入网设备、核心网设备等)。In some embodiments, "network" may be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

在一些实施例中，“接入网设备(access network device，AN device)”、“无线接入网设备(radio access network device，RAN device)”、“基站(base station，BS)”、“无线基站(radio base station)”、“固定台(fixed station)”、“节点(node)”、“接入点(access point)”、“发送点(transmission point，TP)”、“接收点(reception point，RP)”、“发送接收点(transmission/reception point，TRP)”、“面板(panel)”、“天线面板(antenna panel)”、“天线阵列(antenna array)”、“小区(cell)”、“宏小区(macro cell)”、“小型小区(small cell)”、“毫微微小区(femto cell)”、“微微小区(pico cell)”、“扇区(sector)”、“小区组(cell group)”、“载波(carrier)”、“分量载波(component carrier)”、“带宽部分(bandwidth part，BWP)”等术语可以相互替换。In some embodiments, the terms "access network device (AN device), "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", "node", "access point (access point)", "transmission point (TP)", "reception point (RP)", "transmission/reception point (TRP)", "panel", "antenna panel (antenna panel)", "antenna array (antenna array)", "cell", "macro cell", "small cell (small cell)", "femto cell (femto cell)", "pico cell (pico cell)", "sector (sector)", "cell group (cell)", "carrier (carrier)", "component carrier (component carrier)", "bandwidth part (bandwidth part (BWP))" and so on can be used interchangeably.

在一些实施例中，“终端(terminal)”、“终端设备(terminal device)”、“用户设备(user equipment，UE)”、“用户终端(user terminal)”、“移动台(mobile station，MS)”、“移动终端(mobile terminal，MT)”、订户站(subscriber station)、移动单元(mobile unit)、订户单元(subscriber unit)、无线单元(wireless unit)、远程单元(remote unit)、移动设备(mobile device)、无线设备(wireless device)、无线通信设备(wireless communication device)、远程设备(remote device)、移动订户站(mobile subscriber station)、接入终端(access terminal)、移动终端(mobile terminal)、无线终端(wireless terminal)、远程终端(remote terminal)、手持设备(handset)、用户代理(user agent)、移动客户端(mobile client)、客户端(client)等术语可以相互替换。In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client and the like can be used interchangeably.

在一些实施例中，接入网设备、核心网设备、或网络设备可以被替换为终端。例如，针对将接入网设备、核心网设备、或网络设备以及终端间的通信置换为多个终端间的通信(例如，也可以被称为设备对设备(device-to-device，D2D)、车联网(vehicle-to-everything，V2X)等)的结构，也可以应用本公开的各实施例。在该情况下，也可以设为终端具有接入网设备所具有的全部或部分功能的结构。此外，“上行”、“下行”等语言也可以被替换为与终端间通信对应的语言(例如，“侧行(side)”)。例如，上行信道、下行信道等可以被替换为侧行信道，上行链路、下行链路等可以被替换为侧行链路。In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the access network device, the core network device, or the network device and the communication between the terminals is replaced by the communication between multiple terminals (for example, it can also be referred to as device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, the language such as "uplink" and "downlink" can also be replaced by the language corresponding to the communication between the terminals (for example, "side"). For example, the uplink channel, the downlink channel, etc. can be replaced by the side channel, and the uplink, the downlink, etc. can be replaced by the side link.

在一些实施例中，终端可以被替换为接入网设备、核心网设备、或网络设备。在该情况下，也可以设为接入网设备、核心网设备、或网络设备具有终端所具有的全部或部分功能的结构。In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may also be configured to have a structure that has all or part of the functions of the terminal.

在一些实施例中，获取数据、信息等可以遵照所在地国家的法律法规。In some embodiments, the acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

在一些实施例中，可以在得到用户同意后获取数据、信息等。In some embodiments, data, information, etc. may be obtained with the user's consent.

此外，本公开实施例的表格中的每一元素、每一行、或每一列均可以作为独立实施例来实施，任意元素、任意行、任意列的组合也可以作为独立实施例来实施。In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, or any columns may also be implemented as an independent embodiment.

本公开中各表所示的对应关系可以被配置，也可以是预定义的。各表中的信息的取值仅仅是举例，可以配置为其他值，本公开并不限定。在配置信息与各参数的对应关系时，并不一定要求必须配置各表中示意出的所有对应关系。例如，本公开中的表格中，某些行示出的对应关系也可以不配置。又例如，可以基于上述表格做适当的变形调整，例如，拆分，合并等等。上述各表中标题示出参数的名称也可以采用通信装置可理解的其他名称，其参数的取值或表示方式也可以通信装置可理解的其他取值或表示方式。上述各表在实现时，也可以采用其他的数据结构，例如可以采用数组、队列、容器、栈、线性表、指针、链表、树、图、结构体、类、堆、散列表或哈希表等。The correspondences shown in the tables in this disclosure can be configured or predefined. The values of the information in each table are only examples and can be configured to other values, which are not limited by this disclosure. When configuring the correspondence between information and parameters, it is not necessary to configure all the correspondences shown in each table. For example, in the tables in this disclosure, the correspondences shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also be in the form of communication The above tables may also be implemented using other data structures, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or the like.

本公开中的预定义可以理解为定义、预先定义、存储、预存储、预协商、预配置、固化、或预烧制。The predefined in the present disclosure may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

图1是根据本公开实施例示出的通信系统的架构示意图。如图1所示，通信系统100可以包括网络设备101、终端(terminal)102中的至少之一。网络设备101可以包括接入网设备、核心网设备中的至少之一。Fig. 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in Fig. 1, the communication system 100 may include at least one of a network device 101 and a terminal 102. The network device 101 may include at least one of an access network device and a core network device.

在一些实施例中，终端例如包括手机(mobile phone)、可穿戴设备、物联网设备、具备通信功能的汽车、智能汽车、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self-driving)中的无线终端设备、远程手术(remote medical surgery)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备、智慧家庭(smart home)中的无线终端设备中的至少一者，但不限于此。In some embodiments, the terminal includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in a smart city (smart city), and at least one of a wireless terminal device in a smart home (smart home), but is not limited to these.

在一些实施例中，接入网设备例如是将终端接入到无线网络的节点或设备，接入网设备可以包括5G通信系统中的演进节点B(evolved NodeB，eNB)、下一代演进节点B(next generation eNB，ng-eNB)、下一代节点B(next generation NodeB，gNB)、节点B(node B，NB)、家庭节点B(home node B，HNB)、家庭演进节点B(home evolved nodeB，HeNB)、无线回传设备、无线网络控制器(radio network controller，RNC)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、基带单元(base band unit，BBU)、移动交换中心、6G通信系统中的基站、开放型基站(Open RAN)、云基站(Cloud RAN)、其他通信系统中的基站、无线保真(wireless fidelity，WiFi)系统中的接入节点中的至少一者，但不限于此。In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved Node B (eNB), a next generation evolved Node B (ng-eNB), a next generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

在一些实施例中，本公开的技术方案可适用于Open RAN架构，此时，本公开实施例所涉及的接入网设备间或者接入网设备内的接口可变为Open RAN的内部接口，这些内部接口之间的流程和信息交互可以通过软件或者程序实现。In some embodiments, the technical solution of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between access network devices or within access network devices involved in the embodiments of the present disclosure may become internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

在一些实施例中，接入网设备可以由集中单元(central unit，CU)与分布式单元(distributed unit，DU)组成的，其中，CU也可以称为控制单元(control unit)，采用CU-DU的结构可以将接入网设备的协议层拆分开，部分协议层的功能放在CU集中控制，剩下部分或全部协议层的功能分布在DU中，由CU集中控制DU，但不限于此。In some embodiments, the access network device may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit). The CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.

在一些实施例中，核心网设备可以是一个设备，包括一个或多个网元，也可以是多个设备或设备群，分别包括一个或多个网元中的全部或部分。网元可以是虚拟的，也可以是实体的。核心网例如包括演进分组核心(Evolved Packet Core，EPC)、5G核心网络(5G Core Network，5GCN)、下一代核心(Next Generation Core，NGC)中的至少一者。或者，该核心网设备也可以是一种位置管理功能网元。示例性地，位置管理功能网元包括位置服务器(location server)，位置服务器可以实现为以下任意一项：位置管理功能(Location Management Function，LMF)、增强服务的流动定位中心(Enhanced Serving Mobile Location Centre，E-SMLC)、安全用户平面定位(Secure User Plane Location，SUPL)和安全用户平面定位平台(SUPL Location Platform，SUPLLP)。In some embodiments, the core network device may be a device including one or more network elements, or may be a plurality of devices or a group of devices, each including all or part of one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC). Alternatively, the core network device may also be a location management function network element. Exemplarily, the location management function network element includes a location server (location server), which may be implemented as any one of the following: a location management function (LMF), an Enhanced Serving Mobile Location Centre (E-SMLC), a Secure User Plane Location (SUPL), and a Secure User Plane Location Platform (SUPLLP).

可以理解的是，本公开实施例描述的通信系统是为了更加清楚的说明本公开实施例的技术方案，并不构成对于本公开实施例提出的技术方案的限定，本领域普通技术人员可知，随着系统架构的演变和新业务场景的出现，本公开实施例提出的技术方案对于类似的技术问题同样适用。It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. A person of ordinary skill in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

下述本公开实施例可以应用于图1所示的通信系统100、或部分主体，但不限于此。图1所示的各主体是例示，通信系统可以包括图1中的全部或部分主体，也可以包括图1以外的其他主体，各主体数量和形态为任意，各主体之间的连接关系是例示，各主体之间可以不连接也可以连接，其连接可以是任意方式，可以是直接连接也可以是间接连接，可以是有线连接也可以是无线连接。The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or part of the subject, but are not limited thereto. The subjects shown in FIG1 are examples, and the communication system may include all or part of the subjects in FIG1 , or may include other subjects other than FIG1 , and the number and form of the subjects are arbitrary, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, which may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.

本公开各实施例可以应用于长期演进(Long Term Evolution，LTE)、LTE-Advanced(LTE-A)、 LTE-Beyond(LTE-B)、SUPER 3G、IMT-Advanced、第四代移动通信系统(4th generation mobile communication system，4G))、第五代移动通信系统(5th generation mobile communication system，5G)、5G新空口(new radio，NR)、未来无线接入(Future Radio Access，FRA)、新无线接入技术(New-Radio Access Technology，RAT)、新无线(New Radio，NR)、新无线接入(New radio access，NX)、未来一代无线接入(Future generation radio access，FX)、Global System for Mobile communications(GSM(注册商标))、CDMA2000、超移动宽带(Ultra Mobile Broadband，UMB)、IEEE 802.11(Wi-Fi(注册商标))、IEEE 802.16(WiMAX(注册商标))、IEEE 802.20、超宽带(Ultra-WideBand，UWB)、蓝牙(Bluetooth(注册商标))、陆上公用移动通信网(Public Land Mobile Network，PLMN)网络、设备到设备(Device-to-Device，D2D)系统、机器到机器(Machine to Machine，M2M)系统、物联网(Internet of Things，IoT)系统、车联网(Vehicle-to-Everything，V2X)、利用其他通信方法的系统、基于它们而扩展的下一代系统等。此外，也可以将多个系统组合(例如，LTE或者LTE-A与5G的组合等)应用。The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Communications Network (Public Land Mobile Communications Network) The 5G network includes a plurality of systems, such as a 5G network, ...

可选地，终端在通过Non-3GPP接入技术接入网络时，可以实现基于无线保真网络的语音(Voice over WIreless-FIdelity，VoWiFi)业务，VoWiFi业务例如可以理解为基于WiFi网络进行语音通信。终端在通过3GPP接入技术接入网络时，可以实现基于新空口网络的语音(Voice over New Radio，VoNR)业务或基于长期演进网络的语音(Voice over Long-TermEvolution，VoLTE)业务，其中，当终端通过3GPP接入技术接入LTE网络时，可以实现VoLTE业务，当终端通过3GPP接入技术接入NR网络时，可以实现VoNR业务。可选地，VoNR业务和VoLTE业务例如可以理解为基于蜂窝技术进行通信。Optionally, when the terminal accesses the network through the Non-3GPP access technology, it can implement the voice over WIreless-FIdelity (VoWiFi) service based on the wireless fidelity network. The VoWiFi service can be understood as voice communication based on the WiFi network, for example. When the terminal accesses the network through the 3GPP access technology, it can implement the voice over New Radio (VoNR) service based on the new air interface network or the voice over Long-Term Evolution (VoLTE) service based on the long-term evolution network. When the terminal accesses the LTE network through the 3GPP access technology, the VoLTE service can be implemented, and when the terminal accesses the NR network through the 3GPP access technology, the VoNR service can be implemented. Optionally, the VoNR service and the VoLTE service can be understood as communication based on cellular technology, for example.

可选地，当终端通过Non-3GPP接入技术接入网络时，在某些情况下终端可能会需要切换至通过3GPP接入技术接入网络，其中，可以是由终端确定当前是否要从Non-3GPP接入技术切换至3GPP接入技术。例如，终端通过Non-3GPP接入技术接入网络时，若终端当前正在执行VoWiFi业务，此时，当终端通过Non-3GPP接入技术所接入的网络的WiFi信号不好，则会影响到VoWiFi业务的语音通信质量，终端会确定需要将接入技术从Non-3GPP接入技术切换至3GPP接入技术，以便避免用VoWiFi业务进行语音通信，而平滑无感切换至使用VoNR业务或VoLTE业务进行语音通信。或者，终端通过Non-3GPP接入技术接入网络时，若终端当前正在执行VoWiFi业务，此时，当终端移动至只有蜂窝信号的环境中时，终端只能通过VoNR业务或VoLTE业务进行语音通信，则终端确定需要将接入技术从Non-3GPP接入技术切换至3GPP接入技术以平滑无感切换至使用VoNR业务或VoLTE业务进行语音通信。Optionally, when the terminal accesses the network through the Non-3GPP access technology, in some cases the terminal may need to switch to accessing the network through the 3GPP access technology, wherein the terminal may determine whether to switch from the Non-3GPP access technology to the 3GPP access technology. For example, when the terminal accesses the network through the Non-3GPP access technology, if the terminal is currently executing the VoWiFi service, at this time, when the WiFi signal of the network accessed by the terminal through the Non-3GPP access technology is not good, it will affect the voice communication quality of the VoWiFi service. The terminal will determine that the access technology needs to be switched from the Non-3GPP access technology to the 3GPP access technology, so as to avoid using the VoWiFi service for voice communication, and smoothly and seamlessly switch to using the VoNR service or the VoLTE service for voice communication. Alternatively, when the terminal accesses the network through Non-3GPP access technology, if the terminal is currently executing the VoWiFi service, at this time, when the terminal moves to an environment with only cellular signals, the terminal can only perform voice communication through the VoNR service or the VoLTE service. The terminal determines that the access technology needs to be switched from the Non-3GPP access technology to the 3GPP access technology in order to smoothly and seamlessly switch to using the VoNR service or the VoLTE service for voice communication.

但是，在通信系统中，网络可能并不支持“从Non-3GPP接入技术切换至3GPP接入技术”这一过程，而终端并无法知晓其当前接入的网络是否支持“从Non-3GPP接入技术切换至3GPP接入技术”，则可能会出现，终端当前接入的网络不支持“从Non-3GPP接入技术切换至3GPP接入技术”，但终端确定要从Non-3GPP接入技术切换至3GPP接入技术，并且执行了从Non-3GPP接入技术切换至3GPP接入技术这一流程，则可能会导致切换失败，从而导致掉话，承载断链现象等现象，影响语音通信质量。However, in the communication system, the network may not support the process of "switching from Non-3GPP access technology to 3GPP access technology", and the terminal cannot know whether the network it is currently accessing supports "switching from Non-3GPP access technology to 3GPP access technology". It may happen that the network the terminal is currently accessing does not support "switching from Non-3GPP access technology to 3GPP access technology", but the terminal determines to switch from Non-3GPP access technology to 3GPP access technology, and executes the process of switching from Non-3GPP access technology to 3GPP access technology. This may cause switching failure, resulting in dropped calls, bearer disconnection and other phenomena, affecting the quality of voice communication.

图2A是根据本公开实施例示出的通信方法的交互示意图。如图2A所示，本公开实施例涉及通信方法，用于通信系统100，上述方法包括：FIG2A is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2A , the present disclosure embodiment relates to a communication method, which is used in a communication system 100, and the method includes:

步骤2101、终端使用Non-3GPP接入技术接入(例如初始接入)5G网络时，网络设备发送第一信息、第二信息、第三信息、第四信息中的至少之一。Step 2101: When the terminal uses Non-3GPP access technology to access (e.g., initial access) a 5G network, the network device sends at least one of first information, second information, third information, and fourth information.

可选地，终端使用Non-3GPP接入技术接入(例如初始接入)5G网络时例如可以理解为：终端在5G SA(Standalone，独立组网)下驻留VoWiFi。Optionally, when the terminal uses Non-3GPP access technology to access (e.g., initial access) a 5G network, it can be understood that the terminal resides on VoWiFi under 5G SA (Standalone).

可选地，在一些实施例之中，该5G网络例如可以为NR网络，该5G网络中可以包括5G核心网络(5G Core Network，5GCN)。上述的“终端使用Non-3GPP接入技术接入5G网络”例如可以包括：终端使用非第三代合作伙伴计划互通功能(Non-3GPP InterWorking Function，N3IWF)接入至5GCN，和/或，在终端与N3IWF之间建立互联网协议多媒体子系统(Internet Protocol multimedia subsystem，IMS)分组数据网(Packet DataNetwork，PDN)连接，并在N3IWF与5GCN之间建立IMS PDN连接。Optionally, in some embodiments, the 5G network may be, for example, an NR network, and the 5G network may include a 5G Core Network (5GCN). The above-mentioned "the terminal uses Non-3GPP access technology to access the 5G network" may include, for example: the terminal uses a non-3GPP InterWorking Function (N3IWF) to access the 5GCN, and/or, an Internet Protocol multimedia subsystem (IMS) packet data network (PDN) connection is established between the terminal and the N3IWF, and an IMS PDN connection is established between the N3IWF and the 5GCN.

可选地，网络设备可以是向终端发送第一信息、第二信息、第三信息、第四信息中的至少之一，终端接收第一信息、第二信息、第三信息、第四信息中的至少之一。 Optionally, the network device may send at least one of the first information, the second information, the third information, and the fourth information to the terminal, and the terminal receives at least one of the first information, the second information, the third information, and the fourth information.

可选地，第一信息可以用于指示网络设备是否支持终端执行第一切换；第一切换可以包括：终端从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入5G网络；可选地，“使用3GPP接入技术接入5G网络”可以包括：终端通过N1接口或N2接口接入5GCN中的网元(如AMF网元等)，并使得终端与5GCN之间建立IMS PDN连接。需要说明的是，此处的“终端使用Non-3GPP接入技术接入5G网络”与“终端使用3GPP接入技术接入5G网络”的不同之处在于：“终端使用Non-3GPP接入技术接入5G网络”是终端通过N3IWF接入至5GCN，而“终端使用3GPP接入技术接入5G网络”则是终端与5GCN建链，但是，终端并未通过N3IWF与5GCN建链。基于此，可选地，在图2B实施例之中，上述的第一切换还可以称为：将终端与N3IWF之间的IMS PDN连接切换至终端与5GCN之间的IMS PDN连接，或称为：终端的IMS PDN连接从N3IWF切换至5GCN。可选地，第一信息例如可以命名为：HO_N3IWF_5GC。Optionally, the first information may be used to indicate whether the network device supports the terminal to perform the first switching; the first switching may include: the terminal switches from accessing the 5G network using the Non-3GPP access technology to accessing the 5G network using the 3GPP access technology; optionally, "accessing the 5G network using the 3GPP access technology" may include: the terminal accesses the network element (such as the AMF network element, etc.) in the 5GCN through the N1 interface or the N2 interface, and establishes an IMS PDN connection between the terminal and the 5GCN. It should be noted that the difference between "the terminal accesses the 5G network using the Non-3GPP access technology" and "the terminal accesses the 5G network using the 3GPP access technology" here is that: "the terminal accesses the 5G network using the Non-3GPP access technology" means that the terminal accesses the 5G network through the N3IWF, while "the terminal accesses the 5G network using the 3GPP access technology" means that the terminal establishes a link with the 5GCN, but the terminal does not establish a link with the 5GCN through the N3IWF. Based on this, optionally, in the embodiment of FIG. 2B , the first switching can also be referred to as: switching the IMS PDN connection between the terminal and the N3IWF to the IMS PDN connection between the terminal and the 5GCN, or as: switching the IMS PDN connection of the terminal from the N3IWF to the 5GCN. Optionally, the first information can be named, for example, HO_N3IWF_5GC.

可选地，第二信息可以用于指示网络设备是否支持终端执行第二切换；第二切换可以包括：终端从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入4G网络；可选地，本公开提到的4G网络例如可以为LTE网络，该4G网络中可以包括4G核心网(Evolved Packet Core，EPC)，可选地，终端使用3GPP接入技术接入4G网络可以包括：终端与EPC建链，和/或，在终端与EPC之间建立IMS PDN连接。基于此，可选地，在图2B实施例之中，上述的第二切换还可以称为：将终端与N3IWF之间的IMS PDN连接切换至终端与EPC之间的IMS PDN连接，或称为：终端的IMS PDN连接从N3IWF切换至EPC。可选地，第二信息例如可以命名为：HO_N3IWF_EPC。Optionally, the second information may be used to indicate whether the network device supports the terminal to perform the second handover; the second handover may include: the terminal switches from accessing the 5G network using the Non-3GPP access technology to accessing the 4G network using the 3GPP access technology; optionally, the 4G network mentioned in the present disclosure may be, for example, an LTE network, which may include a 4G core network (Evolved Packet Core, EPC), and optionally, the terminal accessing the 4G network using the 3GPP access technology may include: the terminal establishing a link with the EPC, and/or, establishing an IMS PDN connection between the terminal and the EPC. Based on this, optionally, in the embodiment of FIG. 2B, the above-mentioned second handover may also be referred to as: switching the IMS PDN connection between the terminal and the N3IWF to the IMS PDN connection between the terminal and the EPC, or as: the IMS PDN connection of the terminal is switched from the N3IWF to the EPC. Optionally, the second information may be named, for example: HO_N3IWF_EPC.

可选地，第三信息可以用于指示网络设备是否支持终端执行第三切换；第三切换可以包括：终端从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入5G网络；可选地，“终端使用Non-3GPP接入技术接入4G网络”例如可以包括：终端使用增强型分组数据网关(evolution Packet Data Gateway，ePDG)接入至EPC，和/或，在终端与ePDG之间建立IMS PDN连接，并在ePDG与EPC之间建立IMS PDN连接；需要说明的是，此处的“终端使用Non-3GPP接入技术接入4G网络”与前述的“终端使用3GPP接入技术接入4G网络”的不同之处在于：“终端使用Non-3GPP接入技术接入4G网络”是终端通过ePDG接入至EPC，而“终端使用3GPP接入技术接入4G网络”则是终端与EPC建链，但是，终端并未通过ePDG与EPC建链。基于此，可选地，在图2B实施例之中，上述的第三切换还可以称为：将终端与ePDG之间的IMS PDN连接切换至终端与5GCN之间的IMS PDN连接，或称为：终端的IMS PDN连接从ePDG切换至5GCN。可选地，第三信息例如可以命名为：HO_ePDG_5GC。Optionally, the third information may be used to indicate whether the network device supports the terminal to perform a third switch; the third switch may include: the terminal switches from using Non-3GPP access technology to access the 4G network to using 3GPP access technology to access the 5G network; optionally, "the terminal uses Non-3GPP access technology to access the 4G network" may include, for example: the terminal uses an enhanced packet data gateway (evolution Packet Data Gateway, ePDG) to access the EPC, and/or, establishes an IMS PDN connection between the terminal and the ePDG, and establishes an IMS PDN connection between the ePDG and the EPC; it should be noted that the difference between "the terminal uses Non-3GPP access technology to access the 4G network" here and the aforementioned "the terminal uses 3GPP access technology to access the 4G network" is that: "the terminal uses Non-3GPP access technology to access the 4G network" means that the terminal accesses the EPC through the ePDG, while "the terminal uses 3GPP access technology to access the 4G network" means that the terminal establishes a link with the EPC, but the terminal does not establish a link with the EPC through the ePDG. Based on this, optionally, in the embodiment of FIG. 2B , the third switching can also be referred to as: switching the IMS PDN connection between the terminal and the ePDG to the IMS PDN connection between the terminal and the 5GCN, or as: switching the IMS PDN connection of the terminal from the ePDG to the 5GCN. Optionally, the third information can be named, for example, HO_ePDG_5GC.

可选地，第四信息可以用于指示网络设备是否支持终端执行第四切换；第四切换可以包括：终端从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入4G网络。可选地，在图2B实施例之中，上述的第四切换还可以称为：将终端与ePDG之间的IMS PDN连接切换至终端与EPC之间的IMS PDN连接，或称为：终端的IMS PDN连接从ePDG切换至EPC。可选地，第四信息例如可以命名为：HO_ePDG_EPC。Optionally, the fourth information may be used to indicate whether the network device supports the terminal to perform a fourth handover; the fourth handover may include: the terminal switches from accessing the 4G network using the Non-3GPP access technology to accessing the 4G network using the 3GPP access technology. Optionally, in the embodiment of FIG. 2B , the fourth handover may also be referred to as: switching the IMS PDN connection between the terminal and the ePDG to the IMS PDN connection between the terminal and the EPC, or as: switching the IMS PDN connection of the terminal from the ePDG to the EPC. Optionally, the fourth information may be named, for example, HO_ePDG_EPC.

可选地，上述的第一信息、第二信息、第三信息、第四信息可以均为N个比特码，N为正整数，其中，当第一信息为第一值(如1)时，可以指示网络设备支持终端执行第一切换，当第一信息为第二值(如0)时，可以指示网络设备不支持终端执行第一切换；当第二信息为第一值(如1)时，可以指示网络设备支持终端执行第二切换，当第二信息为第二值(如0)时，可以指示网络设备不支持终端执行第二切换，当第三信息为第一值(如1)时，可以指示网络设备支持终端执行第三切换，当第三信息为第二值(如0)时，可以指示网络设备不支持终端执行第三切换；当第四信息为第一值(如1)时，可以指示网络设备支持终端执行第四切换，当第四信息为第二值(如0)时，可以指示网络设备不支持终端执行第四切换。Optionally, the above-mentioned first information, second information, third information, and fourth information can all be N bit codes, where N is a positive integer, wherein when the first information is a first value (such as 1), it can indicate that the network device supports the terminal to perform the first switch, and when the first information is a second value (such as 0), it can indicate that the network device does not support the terminal to perform the first switch; when the second information is a first value (such as 1), it can indicate that the network device supports the terminal to perform the second switch, and when the second information is a second value (such as 0), it can indicate that the network device does not support the terminal to perform the second switch; when the third information is a first value (such as 1), it can indicate that the network device supports the terminal to perform the third switch, and when the third information is a second value (such as 0), it can indicate that the network device does not support the terminal to perform the third switch; when the fourth information is a first value (such as 1), it can indicate that the network device supports the terminal to perform the fourth switch, and when the fourth information is a second value (such as 0), it can indicate that the network device does not support the terminal to perform the fourth switch.

可选地，在一些实施例之中，网络设备可以通过第一消息向终端发送上述的第一信息、第二信息、第三信息、第四信息中的至少之一，可选地，该第一消息例如可以为IKE_SA_INIT等，但不限于此，其中，当第一消息为IKE_SA_INIT时，该第一信息、第二信息、第三信息、第四信息中的至少之一可以承载于IKE_SA_INIT的负载通知(Payload Notify)中。Optionally, in some embodiments, the network device may send at least one of the first information, second information, third information, and fourth information to the terminal via a first message. Optionally, the first message may be, for example, IKE_SA_INIT, but is not limited thereto. When the first message is IKE_SA_INIT, at least one of the first information, second information, third information, and fourth information may be carried in a payload notification (Payload Notify) of IKE_SA_INIT.

可选地，在一些实施例之中，由于不同地区的网络所支持的切换能力不同，或者，同一地区的网络所支持的切换能力随着时间会发生变化，因此当终端每次使用Non-3GPP接入技术接入5G网络时，网络设备会更新向终端发送第一信息、第二信息、第三信息、第四信息中的至少之一，以确保终端所获取到的第一信息、第二信息、第三信息、第四信息中的至少之一指示的是当前网络的最新的切换能力，进而当终端后续基于第一信息、第二信息、第三信息、第四信息中的至少之一执行相关操作时，可以确保准确度。Optionally, in some embodiments, since the switching capabilities supported by networks in different regions are different, or the switching capabilities supported by networks in the same region may change over time, each time the terminal uses the Non-3GPP access technology to access the 5G network, the network device will update and send at least one of the first information, the second information, the third information, and the fourth information to the terminal to ensure that the terminal obtains the first information. At least one of the first information, the second information, the third information, and the fourth information indicates the latest switching capability of the current network, so that when the terminal subsequently performs related operations based on at least one of the first information, the second information, the third information, and the fourth information, accuracy can be ensured.

步骤2102、终端确定需要通过3GPP接入技术接入网络时，终端基于第一信息、第二信息、第三信息、第四信息中的至少之一确定终端通过3GPP接入技术接入网络时的方式。Step 2102: When the terminal determines that it needs to access the network through the 3GPP access technology, the terminal determines the way in which the terminal accesses the network through the 3GPP access technology based on at least one of the first information, the second information, the third information, and the fourth information.

可选地，上述的“需要通过3GPP接入技术接入网络”可以包括：终端当前通过5G网络进行基于WiFi技术的VoWiFi业务的过程中，当前WiFi信号不好，或者，终端移动至仅有蜂窝信号的环境等，但不限于此。关于该部分内容详见图2A实施例前的描述内容。Optionally, the above-mentioned "need to access the network through 3GPP access technology" may include: the terminal is currently performing a VoWiFi service based on WiFi technology through a 5G network, the current WiFi signal is not good, or the terminal moves to an environment with only cellular signals, etc., but is not limited thereto. For details about this part, please refer to the description before the embodiment of Figure 2A.

在一些实施例之中，当第一信息指示网络设备支持终端执行第一切换，和/或，第二信息指示网络设备支持终端执行第二切换(例如可以理解为：SA下驻留VoWiFi时，HO_N3IWF_EPC/HO_N3IWF_5GC支持)时，说明网络设备支持终端从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入5G网络，和/或，网络设备支持终端从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入4G网络，此时，当终端需要通过3GPP接入技术接入网络时，终端可以执行第一切换或第二切换，以从Non-3GPP接入技术切换至3GPP接入技术，进而使得终端从基于WiFi技术的VoWiFi业务切换至基于蜂窝技术的VoLTE业务或VoNR业务，以确保语音通信可以继续顺利进行，保证语音通信质量。可选地，在一些实施例之中，当第一信息指示网络设备支持第一切换时，若终端需要通过3GPP接入技术接入网络，则终端执行第一切换；当第二信息指示网络设备支持第二切换时，若终端需要通过3GPP接入技术接入网络，则终端执行第二切换；当第一信息指示网络设备支持第一切换、且第二信息指示网络设备支持第二切换时，若终端需要通过3GPP接入技术接入网络，则终端执行第一切换或第二切换。其中，终端执行第一切换的方法可以包括：终端可以先释放与N3IWF之间的连接(例如前述的IMS PDN连接)，并释放N3IWF与5GCN之间的连接，之后，终端可以基于3GPP接入技术通过N1接口或N2接口建立与5G网络之间的连接，如与5G网络中的网元(如AMF网元、UPF网元等)建立连接，以此实现从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入5G网络。终端执行第二切换的方法可以包括：终端可以先释放与N3IWF之间的连接，并释放N3IWF与5GCN之间的连接，之后，终端可以基于3GPP接入技术与4G网络建立连接(如前述的IMS PDN连接)，以此实现从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入4G网络。In some embodiments, when the first information indicates that the network device supports the terminal to perform the first switching, and/or the second information indicates that the network device supports the terminal to perform the second switching (for example, it can be understood as: when VoWiFi is resident under SA, HO_N3IWF_EPC/HO_N3IWF_5GC supports), it means that the network device supports the terminal to switch from accessing the 5G network using Non-3GPP access technology to accessing the 5G network using 3GPP access technology, and/or, the network device supports the terminal to switch from accessing the 5G network using Non-3GPP access technology to accessing the 4G network using 3GPP access technology. At this time, when the terminal needs to access the network through 3GPP access technology, the terminal can perform the first switching or the second switching to switch from Non-3GPP access technology to 3GPP access technology, thereby enabling the terminal to switch from VoWiFi service based on WiFi technology to VoLTE service or VoNR service based on cellular technology to ensure that voice communication can continue smoothly and ensure the quality of voice communication. Optionally, in some embodiments, when the first information indicates that the network device supports the first switching, if the terminal needs to access the network through the 3GPP access technology, the terminal performs the first switching; when the second information indicates that the network device supports the second switching, if the terminal needs to access the network through the 3GPP access technology, the terminal performs the second switching; when the first information indicates that the network device supports the first switching and the second information indicates that the network device supports the second switching, if the terminal needs to access the network through the 3GPP access technology, the terminal performs the first switching or the second switching. Among them, the method for the terminal to perform the first switching may include: the terminal may first release the connection with the N3IWF (such as the aforementioned IMS PDN connection), and release the connection between the N3IWF and the 5GCN, and then the terminal may establish a connection with the 5G network through the N1 interface or the N2 interface based on the 3GPP access technology, such as establishing a connection with the network element in the 5G network (such as the AMF network element, the UPF network element, etc.), so as to achieve switching from accessing the 5G network using the Non-3GPP access technology to accessing the 5G network using the 3GPP access technology. The method for the terminal to perform the second switching may include: the terminal may first release the connection between the terminal and the N3IWF, and release the connection between the N3IWF and the 5GCN. After that, the terminal may establish a connection with the 4G network based on the 3GPP access technology (such as the aforementioned IMS PDN connection), thereby realizing the switching from accessing the 5G network using the Non-3GPP access technology to accessing the 4G network using the 3GPP access technology.

在另一些实施例之中，当第一信息指示网络设备不支持终端执行第一切换、第二信息指示网络设备不支持终端执行第二切换，若终端处于空闲态(例如可以理解为：SA下驻留VoWiFi时，HO_N3IWF_EPC、HO_N3IWF_5GC不支持，且终端处于空闲态)，此时，当终端需要通过3GPP接入技术接入网络时，终端可以去注册5G网络，并通过3GPP接入技术重注册至5G网络或4G网络以发起VoNR业务或VoLTE业务；可选地，此处的终端去注册5G网络是在终端基于Non-3GPP接入技术接入5G网络的情况下由终端去注册该5G网络的，以及后续的重注册时是终端通过3GPP接入技术来重注册的，由此使得终端的接入技术从Non-3GPP接入变更为3GPP接入。可选地，上述的终端去注册5G网络的方法可以包括：终端通过N3IWF向5GCN发送第二消息，该第二消息用于请求去注册，5GCN基于该第二消息删除该终端的上下文信息，并向终端回复第三消息，该第三消息可以指示去注册成功。之后，终端可以通过3GPP接入技术重注册至5G网络或4G网络，此处以“终端通过3GPP接入技术重注册至5G网络”为例进行介绍，可选地，“终端通过3GPP接入技术重注册至5G网络”的方法可以包括：终端向5GCN发送第四消息，该第四消息用于请求注册，5GCN接收到该第四消息之后，可以建立该终端的上下文信息，并可以向终端回复第五消息，该第五消息用于指示注册成功。In other embodiments, when the first information indicates that the network device does not support the terminal to execute the first switching, and the second information indicates that the network device does not support the terminal to execute the second switching, if the terminal is in an idle state (for example, it can be understood that when VoWiFi is resident under SA, HO_N3IWF_EPC and HO_N3IWF_5GC are not supported, and the terminal is in an idle state), at this time, when the terminal needs to access the network through 3GPP access technology, the terminal can de-register with the 5G network, and re-register with the 5G network or 4G network through 3GPP access technology to initiate VoNR service or VoLTE service; optionally, the terminal de-registers with the 5G network here when the terminal accesses the 5G network based on Non-3GPP access technology, and the terminal re-registers through 3GPP access technology during subsequent re-registration, thereby changing the access technology of the terminal from Non-3GPP access to 3GPP access. Optionally, the above-mentioned method for the terminal to deregister with the 5G network may include: the terminal sends a second message to 5GCN through N3IWF, the second message is used to request deregistration, 5GCN deletes the context information of the terminal based on the second message, and replies to the terminal with a third message, and the third message may indicate that the deregistration is successful. Afterwards, the terminal can re-register to the 5G network or 4G network through 3GPP access technology. Here, "the terminal re-registers to the 5G network through 3GPP access technology" is introduced as an example. Optionally, the method of "the terminal re-registers to the 5G network through 3GPP access technology" may include: the terminal sends a fourth message to 5GCN, the fourth message is used to request registration, and after receiving the fourth message, 5GCN can establish the context information of the terminal and can reply to the terminal with a fifth message, and the fifth message is used to indicate that the registration is successful.

需要说明的是，上述的“在终端基于Non-3GPP接入技术接入5G网络的情况下由终端去注册该5G网络，并通过3GPP接入技术重注册至5G网络或4G网络”可以使得终端的接入技术从Non-3GPP接入变更为3GPP接入，上述的“终端使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入5G网络或4G网络”也可以使得终端的接入技术从Non-3GPP接入变更为3GPP接入，但是，两者又具有区别。可选地，以5G网络为例，介绍“在终端基于Non-3GPP接入技术接入5G网络的情况下由终端去注册该5G网络，并通过3GPP接入技术重注册至5G网络”与“终端使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入5G网络”之间的区别，其中，两者的区别主要为：“在终端基于Non-3GPP接入技术接入5G网络的情况下由终端去注册该5G网络，并通过3GPP接入技术重注册至5G网络”时，虽然也是实现了从Non-3GPP接入技术到3GPP接入技术的切换，但是，在去注册5G网络时，5G网络会删除终端的上下文信息，而在重注册至5G网络时，5G网络还需再重新建立终端的上下文信息。而“终端使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入5G网络”时，5G网络不需要删除终端的上下文信息，即可实现从Non-3GPP接入技术到3GPP接入技术的切换。It should be noted that the above-mentioned "when the terminal accesses the 5G network based on Non-3GPP access technology, the terminal registers with the 5G network, and re-registers to the 5G network or 4G network through 3GPP access technology" can change the terminal's access technology from Non-3GPP access to 3GPP access, and the above-mentioned "the terminal switches from accessing the 5G network using Non-3GPP access technology to accessing the 5G network or 4G network using 3GPP access technology" can also change the terminal's access technology from Non-3GPP access to 3GPP access, but there are differences between the two. Optionally, taking the 5G network as an example, the difference between "when the terminal accesses the 5G network based on the Non-3GPP access technology, the terminal registers the 5G network and re-registers to the 5G network through the 3GPP access technology" and "the terminal switches from accessing the 5G network using the Non-3GPP access technology to accessing the 5G network using the 3GPP access technology" is introduced, wherein the difference between the two is mainly: "when the terminal accesses the 5G network based on the Non-3GPP access technology, the terminal registers the 5G network and re-registers to the 5G network through the 3GPP access technology", Although the switch from Non-3GPP access technology to 3GPP access technology is also realized, the 5G network will delete the terminal's context information when deregistering with the 5G network, and the 5G network needs to re-establish the terminal's context information when reregistering with the 5G network. However, when "the terminal switches from accessing the 5G network using Non-3GPP access technology to accessing the 5G network using 3GPP access technology", the 5G network does not need to delete the terminal's context information to realize the switch from Non-3GPP access technology to 3GPP access technology.

在又一些实施例之中，当第一信息指示网络设备不支持终端执行第一切换、第二信息指示网络设备不支持终端执行第二切换时，若第三信息指示网络设备支持终端执行第三切换，和/或，第四信息指示网络设备支持终端执行第四切换，此时，若终端处于连接态(例如可以理解为：SA下驻留VoWiFi时，HO_N3IWF_EPC、HO_N3IWF_5GC不支持，但HO_ePDG_5GC或HO_ePDG_EPC支持，且终端处于连接态)，则终端可以使用Non-3GPP接入技术切换接入至4G网络，并当终端需要通过3GPP接入技术接入网络时，终端执行第三切换或第四切换。可选地，在图2A的实施例之中，终端当前使用的是Non-3GPP接入技术接入至5G网络，此时，若第一信息、第二信息指示网络设备不支持第一切换和第二切换，但第三信息指示网络设备支持第三切换，和/或，第四信息指示网络设备支持第四切换，则说明网络设备不支持当终端使用Non-3GPP接入技术接入5G网络时所进行的Non-3GPP接入技术到3GPP接入技术的切换，但是支持终端使用Non-3GPP接入技术接入4G网络时所进行的Non-3GPP接入技术到3GPP接入技术的切换，此时，终端可以从当前的使用Non-3GPP接入5G网络回落至使用Non-3GPP接入4G网络，以便当终端后续需要通过3GPP接入技术接入网络时，终端可以执行第三切换或第四切换，以从使用Non-3GPP接入4G网络切换至使用3GPP接入5G网络，或者，以从使用Non-3GPP接入4G网络切换至使用3GPP接入4G网络，由此实现Non-3GPP接入技术到3GPP接入技术的成功切换，进而使得终端从基于WiFi技术的VoWiFi业务切换至基于蜂窝技术的VoLTE业务或VoNR业务，以确保语音通信可以继续顺利进行，保证语音通信质量。In some other embodiments, when the first information indicates that the network device does not support the terminal to execute the first switch and the second information indicates that the network device does not support the terminal to execute the second switch, if the third information indicates that the network device supports the terminal to execute the third switch, and/or the fourth information indicates that the network device supports the terminal to execute the fourth switch, at this time, if the terminal is in a connected state (for example, it can be understood that: when VoWiFi is resident under SA, HO_N3IWF_EPC and HO_N3IWF_5GC are not supported, but HO_ePDG_5GC or HO_ePDG_EPC is supported, and the terminal is in a connected state), the terminal can use Non-3GPP access technology to switch access to the 4G network, and when the terminal needs to access the network through 3GPP access technology, the terminal executes the third switch or the fourth switch. Optionally, in the embodiment of Figure 2A, the terminal currently uses Non-3GPP access technology to access the 5G network. At this time, if the first information and the second information indicate that the network device does not support the first switching and the second switching, but the third information indicates that the network device supports the third switching, and/or the fourth information indicates that the network device supports the fourth switching, it means that the network device does not support the switching from Non-3GPP access technology to 3GPP access technology when the terminal uses Non-3GPP access technology to access the 5G network, but supports the switching from Non-3GPP access technology to 3GPP access technology when the terminal uses Non-3GPP access technology to access the 4G network. At this time, the terminal can switch from the current use of No n-3GPP access to the 5G network falls back to using Non-3GPP to access the 4G network, so that when the terminal needs to access the network through 3GPP access technology in the future, the terminal can perform a third switch or a fourth switch to switch from using Non-3GPP to access the 4G network to using 3GPP to access the 5G network, or to switch from using Non-3GPP to access the 4G network to using 3GPP to access the 4G network, thereby achieving a successful switch from Non-3GPP access technology to 3GPP access technology, and then enabling the terminal to switch from the VoWiFi service based on WiFi technology to the VoLTE service or VoNR service based on cellular technology, to ensure that voice communication can continue smoothly and to ensure the quality of voice communication.

可选地，终端从当前的使用Non-3GPP接入5G网络回落至使用Non-3GPP接入4G网络的方法可以包括：终端可以先释放与N3IWF之间的连接(例如前述的IMS PDN连接)，并释放N3IWF与5GCN之间的连接，之后，终端可以建立与ePDG之间的连接(例如前述的IMS PDN连接)，并建立ePDG与EPC之间的连接。可选地，终端执行上述的第三切换的方法可以包括：终端可以先释放与ePDG之间的连接(例如前述的IMS PDN连接)，并释放ePDG与EPC之间的连接，之后，终端可以基于3GPP接入技术通过N1接口或N2接口建立与5G网络之间的连接，以此实现从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入5G网络。可选地，终端执行上述的第四切换的方法可以包括：终端可以先释放与ePDG之间的连接(例如前述的IMS PDN连接)，并释放ePDG与EPC之间的连接，之后，终端可以基于3GPP接入技术与4G网络建立连接(如前述的IMS PDN连接)，以此实现从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入4G网络。Optionally, the method for the terminal to fall back from the current use of Non-3GPP to access the 5G network to the use of Non-3GPP to access the 4G network may include: the terminal may first release the connection with the N3IWF (such as the aforementioned IMS PDN connection), and release the connection between the N3IWF and the 5GCN, after which the terminal may establish a connection with the ePDG (such as the aforementioned IMS PDN connection), and establish a connection between the ePDG and the EPC. Optionally, the method for the terminal to perform the above-mentioned third switching may include: the terminal may first release the connection with the ePDG (such as the aforementioned IMS PDN connection), and release the connection between the ePDG and the EPC, after which the terminal may establish a connection with the 5G network through the N1 interface or the N2 interface based on the 3GPP access technology, thereby achieving switching from accessing the 4G network using the Non-3GPP access technology to accessing the 5G network using the 3GPP access technology. Optionally, the method for the terminal to perform the above-mentioned fourth switching may include: the terminal may first release the connection between the terminal and the ePDG (for example, the aforementioned IMS PDN connection), and release the connection between the ePDG and the EPC, after which the terminal may establish a connection with the 4G network based on the 3GPP access technology (such as the aforementioned IMS PDN connection), thereby achieving switching from accessing the 4G network using the Non-3GPP access technology to accessing the 4G network using the 3GPP access technology.

在又一些实施例之中，当第一信息指示网络设备不支持终端执行第一切换、第二信息指示网络设备不支持终端执行第二切换、第三信息指示网络设备不支持终端执行第三切换、第四信息指示网络设备不支持终端执行第四切换时，若终端处于连接态(例如可以理解为：SA下驻留VoWiFi时，HO_N3IWF_EPC、HO_N3IWF_5GC、HO_ePDG_5GC、HO_ePDG_EPC都不支持，且终端处于连接态)，当终端需要通过3GPP接入技术接入网络时，终端可以去注册第一网络，并通过3GPP接入技术重注册至第一网络或第二网络，和/或，降低第一业务的优先级(例如将第一业务的优先级将至最低)，可选地，第一业务可以为使用Non-3GPP接入技术接入第一网络或第二网络时所执行的业务，例如可以为VoWiFi业务。其中，通过降低第一业务的优先级，以尽量避免终端基于Non-3GPP接入技术驻留在网络中，从而避免出现“终端需要通过3GPP接入技术接入网络时，该终端还基于Non-3GPP接入技术驻留在网络”的情形，以确保通信质量。其中，关于上述的“去注册”、“重注册”的相关介绍可以参考前述实施例描述。In some other embodiments, when the first information indicates that the network device does not support the terminal to execute the first switching, the second information indicates that the network device does not support the terminal to execute the second switching, the third information indicates that the network device does not support the terminal to execute the third switching, and the fourth information indicates that the network device does not support the terminal to execute the fourth switching, if the terminal is in a connected state (for example, it can be understood that when VoWiFi is resident under SA, HO_N3IWF_EPC, HO_N3IWF_5GC, HO_ePDG_5GC, and HO_ePDG_EPC are not supported, and the terminal is in a connected state), when the terminal needs to access the network through 3GPP access technology, the terminal can register with the first network and re-register to the first network or the second network through 3GPP access technology, and/or reduce the priority of the first service (for example, reduce the priority of the first service to the lowest). Optionally, the first service can be a service executed when accessing the first network or the second network using Non-3GPP access technology, for example, it can be a VoWiFi service. Among them, by lowering the priority of the first service, the terminal is prevented from residing in the network based on the Non-3GPP access technology as much as possible, thereby avoiding the situation of "when the terminal needs to access the network through the 3GPP access technology, the terminal also resides in the network based on the Non-3GPP access technology", so as to ensure the communication quality. Among them, the relevant introduction of the above-mentioned "de-registration" and "re-registration" can refer to the description of the above-mentioned embodiment.

本公开实施例所涉及的通信方法可以包括步骤S2101～步骤S2102中的至少一者。例如，步骤S2101可以作为独立实施例来实施，步骤S2102可以作为独立实施例来实施，步骤S2101+S2102可以作为独立实施例来实施，但不限于此。The communication method involved in the embodiment of the present disclosure may include at least one of step S2101 to step S2102. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, and step S2101+S2102 may be implemented as an independent embodiment, but is not limited thereto.

在本实施方式或实施例中，在不矛盾的情况下，各步骤可以独立、任意组合或交换顺序，可选方式或可选例可以任意组合，且可以与其他实施方式或其他实施例的任意步骤之间进行任意组合。In this implementation mode or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other implementation modes or other examples.

图2B是根据本公开实施例示出的通信方法的交互示意图。如图2B所示，本公开实施例涉及通信方法，用于通信系统100，上述方法包括：FIG2B is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2B , the present disclosure embodiment relates to a communication method, For the communication system 100, the method includes:

步骤2201、终端使用Non-3GPP接入技术接入(例如初始接入)4G网络时，网络设备发送第一信息、第二信息、第三信息、第四信息中的至少之一。Step 2201: When the terminal uses Non-3GPP access technology to access (eg, initially access) a 4G network, the network device sends at least one of first information, second information, third information, and fourth information.

可选地，终端使用Non-3GPP接入技术接入(例如初始接入)4G网例如可以理解为：4G下驻留VoWiFi。Optionally, the terminal uses the Non-3GPP access technology to access (eg, initially access) the 4G network, which can be understood as: residing on VoWiFi under 4G.

可选地，在一些实施例之中，关于“4G网络”、“终端使用Non-3GPP接入技术接入4G网络”的相关介绍可以参考上述实施例描述。Optionally, in some embodiments, the relevant introduction about “4G network” and “terminal accessing 4G network using Non-3GPP access technology” can refer to the description of the above embodiments.

可选地，网络设备可以是向终端发送第一信息、第二信息、第三信息、第四信息中的至少之一，终端接收第一信息、第二信息、第三信息、第四信息中的至少之一。Optionally, the network device may send at least one of the first information, the second information, the third information, and the fourth information to the terminal, and the terminal receives at least one of the first information, the second information, the third information, and the fourth information.

可选地，第一信息可以用于指示网络设备是否支持终端执行第一切换；第一切换可以包括：终端从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入4G网络。可选地，第一信息例如可以命名为：HO_ePDG_EPC。Optionally, the first information may be used to indicate whether the network device supports the terminal to perform a first handover; the first handover may include: the terminal switches from accessing the 4G network using the Non-3GPP access technology to accessing the 4G network using the 3GPP access technology. Optionally, the first information may be named, for example: HO_ePDG_EPC.

可选地，第二信息可以用于指示网络设备是否支持终端执行第二切换；第二切换可以包括：终端从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入5G网络。可选地，第二信息例如可以命名为：HO_ePDG_5GC。Optionally, the second information may be used to indicate whether the network device supports the terminal to perform a second handover; the second handover may include: the terminal switches from accessing the 4G network using the Non-3GPP access technology to accessing the 5G network using the 3GPP access technology. Optionally, the second information may be named, for example: HO_ePDG_5GC.

可选地，第三信息可以用于指示网络设备是否支持终端执行第三切换；第三切换可以包括：终端从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入4G网络。可选地，第三信息例如可以命名为：HO_N3IWF_EPC。Optionally, the third information may be used to indicate whether the network device supports the terminal to perform a third handover; the third handover may include: the terminal switches from accessing the 5G network using the Non-3GPP access technology to accessing the 4G network using the 3GPP access technology. Optionally, the third information may be named, for example: HO_N3IWF_EPC.

可选地，第四信息可以用于指示网络设备是否支持终端执行第四切换；第四切换可以包括：终端从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入5G网络。可选地，第四信息例如可以命名为：HO_N3IWF_5GC。Optionally, the fourth information may be used to indicate whether the network device supports the terminal to perform a fourth handover; the fourth handover may include: the terminal switches from accessing the 5G network using the Non-3GPP access technology to accessing the 5G network using the 3GPP access technology. Optionally, the fourth information may be named, for example: HO_N3IWF_5GC.

关于上述的“使用3GPP接入技术接入4G网络”、“使用3GPP接入技术接入5G网络”、“使用Non-3GPP接入技术接入5G网络”的相关介绍可以参考上述实施例描述。For the relevant introduction of the above-mentioned “accessing the 4G network using 3GPP access technology”, “accessing the 5G network using 3GPP access technology”, and “accessing the 5G network using Non-3GPP access technology”, please refer to the above-mentioned embodiment description.

可选地，在一些实施例之中，由于不同地区的网络所支持的切换能力不同，或者，同一地区的网络所支持的切换能力随着时间会发生变化，因此当终端每次使用Non-3GPP接入技术接入5G网络时，网络设备会更新向终端发送第一信息、第二信息、第三信息、第四信息中的至少之一，以确保终端所获取到的第一信息、第二信息、第三信息、第四信息中的至少之一指示的是当前网络的最新的切换能力，进而当终端后续基于第一信息、第二信息、第三信息、第四信息中的至少之一执行相关操作时，可以确保准确度。Optionally, in some embodiments, because the switching capabilities supported by networks in different regions are different, or the switching capabilities supported by networks in the same region may change over time, each time the terminal accesses the 5G network using the Non-3GPP access technology, the network device will update and send at least one of the first information, the second information, the third information, and the fourth information to the terminal to ensure that at least one of the first information, the second information, the third information, and the fourth information obtained by the terminal indicates the latest switching capability of the current network, and then when the terminal subsequently performs related operations based on at least one of the first information, the second information, the third information, and the fourth information, accuracy can be ensured.

步骤2202、终端确定需要通过3GPP接入技术接入网络时，终端基于第一信息、第二信息、第三信息、第四信息中的至少之一确定终端通过3GPP接入技术接入网络时的方式。Step 2202: When the terminal determines that it needs to access the network through the 3GPP access technology, the terminal determines the way in which the terminal accesses the network through the 3GPP access technology based on at least one of the first information, the second information, the third information, and the fourth information.

可选地，上述的“需要通过3GPP接入技术接入网络”部分的相关内容详见前述描述内容。Optionally, for the relevant content of the above-mentioned "need to access the network through 3GPP access technology" part, please refer to the above description.

在一些实施例之中，当第一信息指示网络设备支持终端执行第一切换，和/或，第二信息指示网络设备支持终端执行第二切换时(例如理解为：4G下驻留VoWiFi时，HO_ePDG_5GC或HO_ePDG_EPC支持)，说明网络设备支持终端从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入4G网络，和/或，网络设备支持终端从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入5G网络，此时，当终端需要通过3GPP接入技术接入网络时，终端可以执行第一切换或第二切换，以从Non-3GPP 接入技术切换至3GPP接入技术，进而使得终端从基于WiFi技术的VoWiFi业务切换至基于蜂窝技术的VoLTE业务或VoNR业务，以确保语音通信可以继续顺利进行，保证语音通信质量。可选地，在一些实施例之中，当第一信息指示网络设备支持第一切换时，若终端需要通过3GPP接入技术接入网络，则终端执行第一切换；当第二信息指示网络设备支持第二切换时，若终端需要通过3GPP接入技术接入网络，则终端执行第二切换；当第一信息指示网络设备支持第一切换、且第二信息指示网络设备支持第二切换时，若终端需要通过3GPP接入技术接入网络，则终端执行第一切换或第二切换。其中，终端执行第一切换的方法可以包括：终端可以先释放与ePDG之间的连接(例如前述的IMS PDN连接)，并释放ePDG与EPC之间的连接，之后，终端可以基于3GPP接入技术与4G网络建立连接(如前述的IMS PDN连接)，以此实现从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入4G网络。终端执行第二切换的方法可以包括：终端可以先释放与ePDG之间的连接(例如前述的IMS PDN连接)，并释放ePDG与EPC之间的连接，之后，终端可以基于3GPP接入技术通过N1接口或N2接口建立与5G网络之间的连接，以此实现从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入5G网络。In some embodiments, when the first information indicates that the network device supports the terminal to perform the first switching, and/or the second information indicates that the network device supports the terminal to perform the second switching (for example, it is understood that when VoWiFi is resident under 4G, HO_ePDG_5GC or HO_ePDG_EPC supports), it means that the network device supports the terminal to switch from accessing the 4G network using Non-3GPP access technology to accessing the 4G network using 3GPP access technology, and/or the network device supports the terminal to switch from accessing the 4G network using Non-3GPP access technology to accessing the 5G network using 3GPP access technology. At this time, when the terminal needs to access the network through 3GPP access technology, the terminal can perform the first switching or the second switching to switch from Non-3GPP The access technology is switched to the 3GPP access technology, so that the terminal switches from the VoWiFi service based on WiFi technology to the VoLTE service or VoNR service based on cellular technology to ensure that voice communication can continue smoothly and guarantee the quality of voice communication. Optionally, in some embodiments, when the first information indicates that the network device supports the first switching, if the terminal needs to access the network through the 3GPP access technology, the terminal performs the first switching; when the second information indicates that the network device supports the second switching, if the terminal needs to access the network through the 3GPP access technology, the terminal performs the second switching; when the first information indicates that the network device supports the first switching and the second information indicates that the network device supports the second switching, if the terminal needs to access the network through the 3GPP access technology, the terminal performs the first switching or the second switching. Among them, the method for the terminal to perform the first switching may include: the terminal may first release the connection between the terminal and the ePDG (for example, the aforementioned IMS PDN connection), and release the connection between the ePDG and the EPC, and then the terminal may establish a connection with the 4G network based on the 3GPP access technology (such as the aforementioned IMS PDN connection), so as to achieve switching from accessing the 4G network using the Non-3GPP access technology to accessing the 4G network using the 3GPP access technology. The method for the terminal to perform the second switching may include: the terminal may first release the connection between the terminal and the ePDG (for example, the aforementioned IMS PDN connection), and release the connection between the ePDG and the EPC, and then the terminal may establish a connection with the 5G network through the N1 interface or the N2 interface based on the 3GPP access technology, so as to achieve switching from accessing the 4G network using the Non-3GPP access technology to accessing the 5G network using the 3GPP access technology.

在另一些实施例之中，当第一信息指示网络设备不支持终端执行第一切换、第二信息指示网络设备不支持终端执行第二切换，若终端处于空闲态(例如理解为：4G下驻留VoWiFi时，HO_ePDG_5GC、HO_ePDG_EPC不支持，且终端处于空闲态)，此时，当终端需要通过3GPP接入技术接入网络时，终端可以去注册4G网络，并通过3GPP接入技术重注册至5G网络或4G网络；可选地，此处的终端去注册4G网络是在终端基于Non-3GPP接入技术接入4G网络的情况下由终端去注册该4G网络的，以及后续的重注册时是终端通过3GPP接入技术来重注册的，由此使得终端的接入技术从Non-3GPP接入变更为3GPP接入。可选地，终端去注册4G网络的方法可以包括：终端通过ePDG向EPC发送第六消息，该第六消息用于请求去注册，则EPC基于该第六消息会删除该终端的上下文信息，并可以向终端回复第七消息，该第七消息可以指示去注册成功。之后，终端可以通过3GPP接入技术重注册至5G网络或4G网络，关于重注册部分的相关内容可以参见上述实施例介绍。In other embodiments, when the first information indicates that the network device does not support the terminal to execute the first switching, and the second information indicates that the network device does not support the terminal to execute the second switching, if the terminal is in an idle state (for example, it is understood that when VoWiFi is resident under 4G, HO_ePDG_5GC and HO_ePDG_EPC are not supported, and the terminal is in an idle state), at this time, when the terminal needs to access the network through 3GPP access technology, the terminal can register for the 4G network and re-register to the 5G network or the 4G network through 3GPP access technology; optionally, the terminal de-registers with the 4G network here when the terminal accesses the 4G network based on Non-3GPP access technology, and the terminal re-registers through 3GPP access technology during subsequent re-registration, thereby changing the access technology of the terminal from Non-3GPP access to 3GPP access. Optionally, the method for the terminal to deregister the 4G network may include: the terminal sends a sixth message to the EPC through the ePDG, the sixth message is used to request deregistration, and the EPC deletes the context information of the terminal based on the sixth message, and can reply to the terminal with a seventh message, the seventh message can indicate that the deregistration is successful. Afterwards, the terminal can reregister to the 5G network or the 4G network through the 3GPP access technology, and the relevant content of the reregistration part can refer to the above embodiment.

在又一些实施例之中，当第一信息指示网络设备不支持终端执行第一切换、第二信息指示网络设备不支持终端执行第二切换时，若第三信息指示网络设备支持终端执行第三切换，和/或，第四信息指示网络设备支持终端执行第四切换，此时，若终端处于连接态(例如理解为：4G下驻留VoWiFi时，HO_ePDG_5GC、HO_ePDG_EPC不支持，但HO_N3IWF_EPC或HO_N3IWF_5GC支持，且终端处于连接态)，则终端可以使用Non-3GPP接入技术切换接入至5G网络，并当终端需要通过3GPP接入技术接入网络时，终端执行第三切换或第四切换。可选地，在图2B的实施例之中，终端当前使用的是Non-3GPP接入技术切换接入至4G网络，此时，若第一信息、第二信息指示网络设备不支持第一切换和第二切换，但第三信息指示网络设备支持第三切换，和/或，第四信息指示网络设备支持第四切换，则说明网络设备不支持当终端使用Non-3GPP接入技术接入4G网络时所进行的Non-3GPP接入技术到3GPP接入技术的切换，但是支持终端使用Non-3GPP接入技术接入5G网络时所进行的Non-3GPP接入技术到3GPP接入技术的切换，此时，终端需要从当前的使用Non-3GPP接入4G网络切换至使用Non-3GPP接入5G网络，以便当终端后续需要通过3GPP接入技术接入网络时，终端可以执行第三切换或第四切换，以从使用Non-3GPP接入5G网络切换至使用3GPP接入4G网络，或者，以从使用Non-3GPP接入5G网络切换至使用3GPP接入5G网络，由此实现Non-3GPP接入技术到3GPP接入技术的成功切换，进而使得终端从基于WiFi技术的VoWiFi业务切换至基于蜂窝技术的VoLTE业务或VoNR业务，以确保语音通信可以继续顺利进行，保证语音通信质量。In some other embodiments, when the first information indicates that the network device does not support the terminal to execute the first switch and the second information indicates that the network device does not support the terminal to execute the second switch, if the third information indicates that the network device supports the terminal to execute the third switch, and/or the fourth information indicates that the network device supports the terminal to execute the fourth switch, at this time, if the terminal is in a connected state (for example, it is understood that: when VoWiFi is resident under 4G, HO_ePDG_5GC and HO_ePDG_EPC are not supported, but HO_N3IWF_EPC or HO_N3IWF_5GC is supported, and the terminal is in a connected state), the terminal can use Non-3GPP access technology to switch access to the 5G network, and when the terminal needs to access the network through 3GPP access technology, the terminal executes the third switch or the fourth switch. Optionally, in the embodiment of Figure 2B, the terminal currently uses Non-3GPP access technology to switch access to the 4G network. At this time, if the first information and the second information indicate that the network device does not support the first switching and the second switching, but the third information indicates that the network device supports the third switching, and/or the fourth information indicates that the network device supports the fourth switching, it means that the network device does not support the switching from Non-3GPP access technology to 3GPP access technology when the terminal uses Non-3GPP access technology to access the 4G network, but supports the switching from Non-3GPP access technology to 3GPP access technology when the terminal uses Non-3GPP access technology to access the 5G network. At this time, the terminal needs to switch from the current use of N On-3GPP access to the 4G network is switched to Non-3GPP access to the 5G network, so that when the terminal needs to access the network through 3GPP access technology in the future, the terminal can perform a third switch or a fourth switch to switch from Non-3GPP access to the 5G network to 3GPP access to the 4G network, or to switch from Non-3GPP access to the 5G network to 3GPP access to the 5G network, thereby achieving a successful switch from Non-3GPP access technology to 3GPP access technology, and then enabling the terminal to switch from the VoWiFi service based on WiFi technology to the VoLTE service or VoNR service based on cellular technology, to ensure that voice communication can continue smoothly and ensure the quality of voice communication.

可选地，终端从当前的使用Non-3GPP接入4G网络切换至使用Non-3GPP接入5G网络的方法可以包括：终端可以先释放与ePDG之间的连接(例如前述的IMS PDN连接)，并释放ePDG与EPC之间的连接，之后，终端可以建立与N3IWF之间的连接(例如前述的IMS PDN连接)，并建立N3IWF与5GCN之间的连接。可选地，终端执行上述的第三切换的方法可以包括：终端可以先释放与N3IWF之间的连接(例如前述的IMS PDN连接)，并释放N3IWF与5GCN之间的连接，之后，终端可以基于3GPP接入技术与4G网络建立连接(如前述的IMS PDN连接)，以此实现从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入4G网络。可选地，终端执行上述的第四切换的方法可以包括：终端可以先释放与N3IWF之间的连接(例如前述的IMS PDN连接)，并释放N3IWF与5GCN之间的连接，之后，终端可以基于3GPP接入技术通过N1接口或N2接口建立与5G网络之间的连接，以此实现从使用Non-3GPP接入技术接入5G网络切换至使用3GPP接入技术接入5G网络。Optionally, the method for the terminal to switch from the current use of Non-3GPP to access the 4G network to the use of Non-3GPP to access the 5G network may include: the terminal may first release the connection with the ePDG (for example, the aforementioned IMS PDN connection), and release the connection between the ePDG and the EPC, after which the terminal may establish a connection with the N3IWF (for example, the aforementioned IMS PDN connection), and establish a connection between the N3IWF and the 5GCN. Optionally, the method for the terminal to perform the above-mentioned third switching may include: the terminal may first release the connection with the N3IWF (for example, the aforementioned IMS PDN connection), and release the connection between the N3IWF and the 5GCN, after which the terminal may establish a connection with the 4G network based on the 3GPP access technology (such as the aforementioned IMS PDN connection), thereby achieving switching from accessing the 5G network using the Non-3GPP access technology to accessing the 4G network using the 3GPP access technology. Optionally, the method for the terminal to perform the fourth switching may include: the terminal may first release the connection with the N3IWF (for example, the aforementioned IMS PDN connection), and release the connection between the N3IWF and the 5GCN, and then, The terminal can establish a connection with the 5G network through the N1 interface or the N2 interface based on the 3GPP access technology, thereby switching from accessing the 5G network using the Non-3GPP access technology to accessing the 5G network using the 3GPP access technology.

在又一些实施例之中，当第一信息指示网络设备不支持终端执行第一切换、第二信息指示网络设备不支持终端执行第二切换、第三信息指示网络设备不支持终端执行第三切换、第四信息指示网络设备不支持终端执行第四切换时，若终端处于连接态(例如理解为：4G下驻留VoWiFi时，HO_N3IWF_EPC、HO_N3IWF_5GC、HO_ePDG_5GC、HO_ePDG_EPC都不支持，且终端处于连接态)，当终端需要通过3GPP接入技术接入网络时，终端可以去注册第一网络，并通过3GPP接入技术重注册至第一网络或第二网络，和/或，降低第一业务的优先级，第一业务为使用Non-3GPP接入技术接入第一网络或第二网络时所执行的业务，例如可以为VoWiFi业务，其中，通过降低第一业务的优先级，以尽量避免终端基于Non-3GPP接入技术驻留在网络中，从而避免出现“终端需要通过3GPP接入技术接入网络时，该终端还基于Non-3GPP接入技术驻留在网络”的情形，确保通信质量。其中，关于上述的“去注册”、“重注册”的相关介绍可以参考前述实施例描述。In some other embodiments, when the first information indicates that the network device does not support the terminal to execute the first switching, the second information indicates that the network device does not support the terminal to execute the second switching, the third information indicates that the network device does not support the terminal to execute the third switching, and the fourth information indicates that the network device does not support the terminal to execute the fourth switching, if the terminal is in a connected state (for example, it is understood that when VoWiFi is resident under 4G, HO_N3IWF_EPC, HO_N3IWF_5GC, HO_ePDG_5GC, and HO_ePDG_EPC are not supported, and the terminal is in a connected state), when the terminal needs to access the network through 3GPP access technology When the terminal deregisters with the first network, and reregisters with the first network or the second network through the 3GPP access technology, and/or, lowers the priority of the first service, where the first service is the service executed when the first network or the second network is accessed using the Non-3GPP access technology, such as the VoWiFi service, wherein the priority of the first service is lowered to avoid the terminal from residing in the network based on the Non-3GPP access technology as much as possible, thereby avoiding the situation where "when the terminal needs to access the network through the 3GPP access technology, the terminal still resides in the network based on the Non-3GPP access technology", thereby ensuring the communication quality. For the relevant introduction of the above-mentioned "deregistration" and "reregistration", please refer to the description of the aforementioned embodiment.

本公开实施例所涉及的通信方法可以包括步骤S2201～步骤S2202中的至少一者。例如，步骤S2201可以作为独立实施例来实施，步骤S2202可以作为独立实施例来实施，步骤S2201+S2202可以作为独立实施例来实施，但不限于此。The communication method involved in the embodiment of the present disclosure may include at least one of step S2201 to step S2202. For example, step S2201 may be implemented as an independent embodiment, step S2202 may be implemented as an independent embodiment, and step S2201+S2202 may be implemented as an independent embodiment, but is not limited thereto.

图2C是根据本公开实施例示出的通信方法的交互示意图。如图2C所示，本公开实施例涉及通信方法，用于通信系统100，上述方法包括：FIG2C is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2C , the present disclosure embodiment relates to a communication method, which is used in a communication system 100, and the method includes:

步骤2301、终端使用Non-3GPP接入技术接入第一网络时，终端接收网络设备发送的第一信息、第二信息、第三信息、第四信息中的至少之一。Step 2301: When a terminal accesses a first network using a Non-3GPP access technology, the terminal receives at least one of first information, second information, third information, and fourth information sent by a network device.

可选地，所述第一信息用于指示所述网络设备是否支持所述终端执行第一切换；所述第一切换包括：所述终端从使用Non-3GPP接入技术接入第一网络切换至使用3GPP接入技术接入第一网络；Optionally, the first information is used to indicate whether the network device supports the terminal to perform a first handover; the first handover includes: the terminal switches from accessing the first network using a Non-3GPP access technology to accessing the first network using a 3GPP access technology;

可选地，所述第一网络为第五代移动通信系统5G网络，所述5G网络包括5G核心网5GCN；Optionally, the first network is a fifth generation mobile communication system 5G network, and the 5G network includes a 5G core network 5GCN;

可选地，所述第一网络为4G网络，所述4G网络包括4G核心网EPC；Optionally, the first network is a 4G network, and the 4G network includes a 4G core network EPC;

在一些实施例中，第一网络为：终端当前接入网的网络，例如可以为4G网络或5G网络；第一网络为4G网络时，对应场景可以为：“终端在4G下驻留VoWIFI”时，第一网络为5G网络时，对应场景可以为：“终端在5G SA下驻留VoWIFI”时。In some embodiments, the first network is: the network that the terminal currently accesses, for example, it can be a 4G network or a 5G network; when the first network is a 4G network, the corresponding scenario can be: "the terminal is resident on VoWIFI under 4G", when the first network is a 5G network, the corresponding scenario can be: "the terminal is resident on VoWIFI under 5G SA".

在一些实施例中，第一信息、第二信息、第三信息、第四信息可以分别依次对应：HO_ePDG_EPC/HO_ePDG_5GC/HO_N3IWF_EPC/HO_N3IWF_5GC。In some embodiments, the first information, the second information, the third information, and the fourth information may correspond to: HO_ePDG_EPC/HO_ePDG_5GC/HO_N3IWF_EPC/HO_N3IWF_5GC, respectively.

可选地，当第一网络为4G网络时，第二网络为5G网络，第一信息为：HO_ePDG_EPC；当第一网络为5G网络时，第二网络为4G网络，第一信息为：HO_N3IWF_5GC。Optionally, when the first network is a 4G network and the second network is a 5G network, the first information is: HO_ePDG_EPC; when the first network is a 5G network and the second network is a 4G network, the first information is: HO_N3IWF_5GC.

可选地，当第一网络为4G网络时，第二网络为5G网络，第二信息为：HO_ePDG_5GC；当第一网络为5G网络时，第二网络为4G网络，第二信息为：HO_N3IWF_EPC。Optionally, when the first network is a 4G network and the second network is a 5G network, the second information is: HO_ePDG_5GC; when the first network is a 5G network and the second network is a 4G network, the second information is: HO_N3IWF_EPC.

可选地，当第一网络为4G网络时，第二网络为5G网络，第三信息为：HO_N3IWF_EPC；当第一网络为5G网络时，第二网络为4G网络，第三信息为：HO_ePDG_5GC。Optionally, when the first network is a 4G network and the second network is a 5G network, the third information is: HO_N3IWF_EPC; when the first network is a 5G network and the second network is a 4G network, the third information is: HO_ePDG_5GC.

可选地，当第一网络为4G网络时，第二网络为5G网络，第四信息为：HO_N3IWF_5GC；当第一网络为5G网络时，第二网络为4G网络，第四信息为：HO_ePDG_EPC。Optionally, when the first network is a 4G network and the second network is a 5G network, the fourth information is: HO_N3IWF_5GC; ... When the first network is a 5G network, the second network is a 4G network, and the fourth information is: HO_ePDG_EPC.

可选地，当第一网络为5G网络时，第一切换对应：SA下驻留在VoWIFI时，N3IWF和5GC之间的，当第一网络为4G网络时，第一切换对应：4G下驻留在VoWIFI时，ePDG与EPC之间的切换。Optionally, when the first network is a 5G network, the first switching corresponds to: when residing in VoWIFI under SA, the switching between N3IWF and 5GC; when the first network is a 4G network, the first switching corresponds to: when residing in VoWIFI under 4G, the switching between ePDG and EPC.

可选地，当第一网络为5G网络时，第二切换对应：SA下驻留在VoWIFI时，N3IWF和EPC之间的，当第一网络为4G网络时，第二切换对应：4G下驻留在VoWIFI时，ePDG与5GC之间的切换。Optionally, when the first network is a 5G network, the second switching corresponds to: when residing in VoWIFI under SA, the switching between N3IWF and EPC; when the first network is a 4G network, the second switching corresponds to: when residing in VoWIFI under 4G, the switching between ePDG and 5GC.

可选地，当第一网络为5G网络时，第三切换对应：SA下驻留在VoWIFI时，ePDG和5GC之间的，当第一网络为4G网络时，第三切换对应：4G下驻留在VoWIFI时，N3IWF与EPC之间的切换。Optionally, when the first network is a 5G network, the third switching corresponds to: when residing in VoWIFI under SA, the switching between ePDG and 5GC; when the first network is a 4G network, the third switching corresponds to: when residing in VoWIFI under 4G, the switching between N3IWF and EPC.

可选地，当第一网络为5G网络时，第四切换对应：SA下驻留在VoWIFI时，ePDG和EPC之间的，当第一网络为4G网络时，第四切换对应：4G下驻留在VoWIFI时，N3IWF与5GC之间的切换。Optionally, when the first network is a 5G network, the fourth switching corresponds to: when residing in VoWIFI under SA, the switching between ePDG and EPC; when the first network is a 4G network, the fourth switching corresponds to: when residing in VoWIFI under 4G, the switching between N3IWF and 5GC.

需要说明的是，仅以“第一网络为4G网络，第二网络为5G网络”或者“第一网络为5G网络，第二网络为4G网络”为例进行了介绍，应当理解，第一网络也可以为其他网络(如已存在的其他网络或者未来会有的其他网络)，第二网络也可以为其他网络(如已存在的其他网络或者未来会有的其他网络)，例如，第一网络还可以为6G网络，第二网络还可以为7G网络，或者，第一网络也可以为6G网络，第二网络可以为5G网络等，本公开对此不作限定。It should be noted that only “the first network is a 4G network, and the second network is a 5G network” or “the first network is a 5G network, and the second network is a 4G network” is introduced as an example. It should be understood that the first network can also be other networks (such as other existing networks or other networks in the future), and the second network can also be other networks (such as other existing networks or other networks in the future). For example, the first network can also be a 6G network, and the second network can also be a 7G network, or the first network can also be a 6G network, and the second network can be a 5G network, etc., and the present disclosure does not limit this.

步骤2302、终端确定需要通过3GPP接入技术接入网络时，终端基于第一信息、第二信息、第三信息、第四信息中的至少之一确定终端通过3GPP接入技术接入网络时的方式。Step 2302: When the terminal determines that it needs to access the network through the 3GPP access technology, the terminal determines the way in which the terminal accesses the network through the 3GPP access technology based on at least one of the first information, the second information, the third information, and the fourth information.

可选地，所述第一信息指示所述网络设备支持所述终端执行第一切换，和/或，所述第二信息指示所述网络设备支持所述终端执行第二切换，当所述终端需要通过3GPP接入技术接入网络时，所述终端执行所述第一切换或所述第二切换；Optionally, the first information indicates that the network device supports the terminal to perform a first handover, and/or the second information indicates that the network device supports the terminal to perform a second handover, and when the terminal needs to access the network through a 3GPP access technology, the terminal performs the first handover or the second handover;

可选地，上述的内容可以为：5G下VoWIFI注册处理逻辑及切换(Handover，HO)功能判断，或者，4G下VoWIFI注册处理逻辑及HO功能判断。Optionally, the above content may be: VoWIFI registration processing logic and handover (HO) function judgment under 5G, or VoWIFI registration processing logic and HO function judgment under 4G.

可选地，上述的“所述第一信息指示所述网络设备支持所述终端执行第一切换，和/或，所述第二信息指示所述网络设备支持所述终端执行第二切换”例如可以理解为：当第一网络为5G网络时，SA下驻留在VoWIFI时，支持HO_N3IWF_5GC，和/或，支持HO_N3IWF_EPC；当第一网络为4G网络时，4G下驻留在VoWIFI时，支持HO_ePDG_EPC，和/或，支持HO_ePDG_5GC。Optionally, the above-mentioned "the first information indicates that the network device supports the terminal to perform a first switch, and/or, the second information indicates that the network device supports the terminal to perform a second switch" can be understood as: when the first network is a 5G network, when residing in VoWIFI under SA, it supports HO_N3IWF_5GC, and/or, supports HO_N3IWF_EPC; when the first network is a 4G network, when residing in VoWIFI under 4G, it supports HO_ePDG_EPC, and/or, supports HO_ePDG_5GC.

可选地，上述的“所述第一信息指示所述网络设备不支持所述终端执行第一切换、所述第二信息指示所述网络设备不支持所述终端执行第二切换，若所述终端处于空闲态”例如可以理解为：当第一网络为5G 网络时，SA下驻留在VoWIFI时，不支持HO_N3IWF_5GC、不支持HO_N3IWF_EPC，且终端处于空闲态；当第一网络为4G网络时，4G下驻留在VoWIFI时，不支持HO_ePDG_EPC、不支持HO_ePDG_5GC，且终端处于空闲态。Optionally, the above-mentioned “the first information indicates that the network device does not support the terminal to perform the first switching, and the second information indicates that the network device does not support the terminal to perform the second switching, if the terminal is in an idle state” can be understood as: when the first network is 5G When the first network is a 4G network, when it is residing in VoWIFI under SA, HO_N3IWF_5GC is not supported, HO_N3IWF_EPC is not supported, and the terminal is in an idle state; when the first network is a 4G network, when it is residing in VoWIFI under 4G, HO_ePDG_EPC is not supported, HO_ePDG_5GC is not supported, and the terminal is in an idle state.

可选地，上述的“所述第一信息指示所述网络设备不支持所述终端执行第一切换、所述第二信息指示所述网络设备不支持所述终端执行第二切换，并且，当所述第三信息指示所述网络设备支持所述终端执行第三切换，和/或，所述第四信息指示所述网络设备支持所述终端执行第四切换”例如可以理解为：当第一网络为5G网络时，SA下驻留在VoWIFI时，不支持HO_N3IWF_5GC，不支持HO_N3IWF_EPC、终端处于连接态，同时，支持HO_ePDG_5GC，和/或，支持HO_ePDG_EPC；当第一网络为4G网络时，4G下驻留在VoWIFI时，不支持HO_ePDG_EPC、不支持HO_ePDG_5GC、终端处于连接态，同时，支持HO_N3IWF_EPC，和/或，支持HO_N3IWF_5GC。Optionally, the above-mentioned "the first information indicates that the network device does not support the terminal to perform the first switching, the second information indicates that the network device does not support the terminal to perform the second switching, and when the third information indicates that the network device supports the terminal to perform the third switching, and/or, the fourth information indicates that the network device supports the terminal to perform the fourth switching" can be understood as: when the first network is a 5G network, when residing in VoWIFI under SA, HO_N3IWF_5GC is not supported, HO_N3IWF_EPC is not supported, and the terminal is in a connected state, and at the same time, HO_ePDG_5GC is supported, and/or HO_ePDG_EPC is supported; when the first network is a 4G network, when residing in VoWIFI under 4G, HO_ePDG_EPC is not supported, HO_ePDG_5GC is not supported, and the terminal is in a connected state, and at the same time, HO_N3IWF_EPC is supported, and/or HO_N3IWF_5GC is supported.

可选地，上述的“终端使用Non-3GPP接入技术切换接入至第二网络”例如可以理解为：当第一网络为5G网络时，对应：回落到LTE下的VoWIFI；当第一网络为4G网络时，对应：切换到5G下的VoWIFI。Optionally, the above-mentioned "the terminal uses Non-3GPP access technology to switch access to the second network" can be understood as: when the first network is a 5G network, it corresponds to: falling back to VoWIFI under LTE; when the first network is a 4G network, it corresponds to: switching to VoWIFI under 5G.

可选地，上述的“所述第一信息指示所述网络设备不支持所述终端执行第一切换、所述第二信息指示所述网络设备不支持所述终端执行第二切换、所述第三信息指示所述网络设备不支持所述终端执行第三切换、所述第四信息指示所述网络设备不支持所述终端执行第四切换，若所述终端处于连接态”例如可以理解为：不支持HO_N3IWF_5GC，不支持HO_N3IWF_EPC、终端处于连接态，同时，不支持HO_ePDG_5GC，不支持HO_ePDG_EPC。Optionally, the above-mentioned "the first information indicates that the network device does not support the terminal to execute the first switching, the second information indicates that the network device does not support the terminal to execute the second switching, the third information indicates that the network device does not support the terminal to execute the third switching, and the fourth information indicates that the network device does not support the terminal to execute the fourth switching if the terminal is in a connected state" can be understood as: HO_N3IWF_5GC is not supported, HO_N3IWF_EPC is not supported, the terminal is in a connected state, and at the same time, HO_ePDG_5GC is not supported, and HO_ePDG_EPC is not supported.

可选地，上述的“终端去注册所述第一网络并通过3GPP接入技术重注册至第一网络或第二网络”例如可以理解为：终端通过3GPP接入技术重注册至第一网络或第二网络以发起VoNR或VoLTE通话。Optionally, the above-mentioned “the terminal de-registers with the first network and re-registers with the first network or the second network through 3GPP access technology” can be understood as: the terminal re-registers with the first network or the second network through 3GPP access technology to initiate a VoNR or VoLTE call.

可选地，所述第一业务包括基于无线保真网络的语音VoWiFi业务。Optionally, the first service includes a voice VoWiFi service based on a wireless fidelity network.

本公开实施例所涉及的通信方法可以包括步骤S2301～步骤S2302中的至少一者。例如，步骤S2301可以作为独立实施例来实施，步骤S2302可以作为独立实施例来实施，步骤S2301+S2302可以作为独立实施例来实施，但不限于此。The communication method involved in the embodiment of the present disclosure may include at least one of step S2301 to step S2302. For example, step S2301 may be implemented as an independent embodiment, step S2302 may be implemented as an independent embodiment, and step S2301+S2302 may be implemented as an independent embodiment, but is not limited thereto.

图3A是根据本公开实施例示出的通信方法的交互示意图。如图3A所示，本公开实施例涉及通信方法，用于终端102，上述方法包括：FIG3A is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG3A , the present disclosure embodiment relates to a communication method, which is used in a terminal 102, and the method includes:

步骤3101、终端使用Non-3GPP接入技术接入5G网络时，终端接收网络设备发送的第一信息、第二信息、第三信息、第四信息中的至少之一。Step 3101: When the terminal uses Non-3GPP access technology to access the 5G network, the terminal receives at least one of the first information, the second information, the third information, and the fourth information sent by the network device.

步骤3102、终端确定需要通过3GPP接入技术接入网络时，终端基于第一信息、第二信息、第三信息、第四信息中的至少之一确定终端通过3GPP接入技术接入网络时的方式。Step 3102: When the terminal determines that it needs to access the network through the 3GPP access technology, the terminal determines the way in which the terminal accesses the network through the 3GPP access technology based on at least one of the first information, the second information, the third information, and the fourth information.

关于步骤3101-3102的详细介绍可以参考上述实施例描述。For a detailed description of steps 3101 - 3102 , please refer to the above embodiment description.

本公开实施例所涉及的通信方法可以包括步骤S3101～步骤S3102中的至少一者。例如，步骤S3101可以作为独立实施例来实施，步骤S3102可以作为独立实施例来实施，步骤S3101+S3102可以作为独立实施例来实施，但不限于此。The communication method involved in the embodiment of the present disclosure may include at least one of step S3101 to step S3102. For example, step S3101 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, and step S3101+S3102 may be implemented as an independent embodiment, but is not limited thereto.

图3B是根据本公开实施例示出的通信方法的交互示意图。如图3B所示，本公开实施例涉及通信方法，用于终端102，上述方法包括：FIG3B is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG3B , the present disclosure embodiment relates to a communication method, which is used in a terminal 102, and the method includes:

步骤3201、终端使用Non-3GPP接入技术接入4G网络时，终端接收网络设备发送的第一信息、第二信息、第三信息、第四信息中的至少之一。Step 3201: When the terminal uses the Non-3GPP access technology to access the 4G network, the terminal receives at least one of the first information, the second information, the third information, and the fourth information sent by the network device.

步骤3202、终端确定需要通过3GPP接入技术接入网络时，终端基于第一信息、第二信息、第三信息、第四信息中的至少之一确定终端通过3GPP接入技术接入网络时的方式。Step 3202: When the terminal determines that it needs to access the network through the 3GPP access technology, the terminal determines the way in which the terminal accesses the network through the 3GPP access technology based on at least one of the first information, the second information, the third information, and the fourth information.

关于步骤3201-3202的详细介绍可以参考上述实施例描述。For a detailed description of steps 3201 - 3202 , please refer to the above embodiment description.

本公开实施例所涉及的通信方法可以包括步骤S3201～步骤S3202中的至少一者。例如，步骤S3201可以作为独立实施例来实施，步骤S3202可以作为独立实施例来实施，步骤S3201+S3202可以作为独立实施例来实施，但不限于此。The communication method involved in the embodiment of the present disclosure may include at least one of step S3201 to step S3202. For example, step S3201 may be implemented as an independent embodiment, step S3202 may be implemented as an independent embodiment, and steps S3201+S3202 may be implemented as independent embodiments. The invention is implemented by the embodiments, but is not limited to these.

图3C是根据本公开实施例示出的通信方法的交互示意图。如图3C所示，本公开实施例涉及通信方法，用于终端102，上述方法包括：FIG3C is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG3C , the present disclosure embodiment relates to a communication method, which is used in a terminal 102, and the method includes:

步骤3301、终端使用Non-3GPP接入技术接入第一网络时，终端接收网络设备发送的第一信息、第二信息、第三信息、第四信息中的至少之一。Step 3301: When a terminal accesses a first network using a Non-3GPP access technology, the terminal receives at least one of first information, second information, third information, and fourth information sent by a network device.

步骤3302、终端确定需要通过3GPP接入技术接入网络时，终端基于第一信息、第二信息、第三信息、第四信息中的至少之一确定终端通过3GPP接入技术接入网络时的方式。Step 3302: When the terminal determines that it needs to access the network through the 3GPP access technology, the terminal determines the way in which the terminal accesses the network through the 3GPP access technology based on at least one of the first information, the second information, the third information, and the fourth information.

关于步骤3301-3302的详细介绍可以参考上述实施例描述。For a detailed description of steps 3301 - 3302 , please refer to the above embodiment description.

本公开实施例所涉及的通信方法可以包括步骤S3301～步骤S3302中的至少一者。例如，步骤S3301可以作为独立实施例来实施，步骤S3302可以作为独立实施例来实施，步骤S3301+S3302可以作为独立实施例来实施，但不限于此。The communication method involved in the embodiment of the present disclosure may include at least one of step S3301 to step S3302. For example, step S3301 may be implemented as an independent embodiment, step S3302 may be implemented as an independent embodiment, and step S3301+S3302 may be implemented as an independent embodiment, but is not limited thereto.

图3D是根据本公开实施例示出的通信方法的交互示意图。如图3D所示，本公开实施例涉及通信方法，用于终端102，上述方法包括：FIG3D is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG3D , the present disclosure embodiment relates to a communication method, which is used in a terminal 102, and the method includes:

步骤3401、终端使用Non-3GPP接入技术接入第一网络时，终端接收网络设备发送的第一信息、第二信息、第三信息、第四信息中的至少之一。Step 3401: When a terminal accesses a first network using a Non-3GPP access technology, the terminal receives at least one of first information, second information, third information, and fourth information sent by a network device.

可选地，所述方法还包括以下至少之一：Optionally, the method further comprises at least one of the following:

所述第一信息指示所述网络设备不支持所述终端执行第一切换、所述第二信息指示所述网络设备不支持所述终端执行第二切换、所述第三信息指示所述网络设备不支持所述终端执行第三切换、所述第四信息指示所述网络设备不支持所述终端执行第四切换，若所述终端处于连接态，当所述终端需要通过3GPP接入技术接入网络时，所述终端去注册所述第一网络并通过3GPP接入技术重注册至第一网络或第二网络，和/或，降低第一业务的优先级，所述第一业务为使用Non-3GPP接入技术接入第一网络或第二网络时所执行的业务。The first information indicates that the network device does not support the terminal to perform a first handover, the second information indicates that the network device does not support the terminal to perform a second handover, the third information indicates that the network device does not support the terminal to perform a third handover, and the fourth information Indicate that the network device does not support the terminal to perform the fourth switch. If the terminal is in a connected state, when the terminal needs to access the network through 3GPP access technology, the terminal registers with the first network and re-registers to the first network or the second network through 3GPP access technology, and/or reduces the priority of the first service, where the first service is the service executed when accessing the first network or the second network using Non-3GPP access technology.

关于步骤3401的详细介绍可以参考上述实施例描述。For a detailed description of step 3401, please refer to the above embodiment description.

图4A是根据本公开实施例示出的通信方法的交互示意图。如图4A所示，本公开实施例涉及通信方法，用于网络设备101，上述方法包括：FIG4A is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG4A , the present disclosure embodiment relates to a communication method, which is used in a network device 101, and the method includes:

步骤4101、终端使用Non-3GPP接入技术接入5G网络时，发送第一信息、第二信息、第三信息、第四信息中的至少之一。Step 4101: When the terminal uses Non-3GPP access technology to access the 5G network, at least one of the first information, the second information, the third information, and the fourth information is sent.

关于步骤4101的详细介绍可以参考上述实施例的内容。For a detailed introduction to step 4101, please refer to the contents of the above embodiment.

图4B是根据本公开实施例示出的通信方法的交互示意图。如图4B所示，本公开实施例涉及通信方法，用于网络设备101，上述方法包括：FIG4B is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG4B , the present disclosure embodiment relates to a communication method, which is used in a network device 101, and the method includes:

步骤4201、终端使用Non-3GPP接入技术接入4G网络时，发送第一信息、第二信息、第三信息、第四信息中的至少之一。Step 4201: When the terminal uses the Non-3GPP access technology to access the 4G network, at least one of the first information, the second information, the third information, and the fourth information is sent.

关于步骤4201的详细介绍可以参考上述实施例的内容。For a detailed introduction to step 4201, please refer to the contents of the above embodiment.

图4C是根据本公开实施例示出的通信方法的交互示意图。如图4C所示，本公开实施例涉及通信方法，用于网络设备101，上述方法包括：FIG4C is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG4C , the present disclosure embodiment relates to a communication method, which is used in a network device 101, and the method includes:

步骤4301、终端使用Non-3GPP接入技术接入第一网络时，发送第一信息、第二信息、第三信息、第四信息中的至少之一。Step 4301: When the terminal uses the Non-3GPP access technology to access the first network, at least one of the first information, the second information, the third information, and the fourth information is sent.

关于步骤4301的详细介绍可以参考上述实施例的内容。For a detailed introduction to step 4301, please refer to the contents of the above embodiment.

图5A是根据本公开实施例示出的通信方法的交互示意图。如图5A所示，本公开实施例涉及通信方法，用于通信系统，该通信系统包括终端、网络设备，上述方法包括以下至少之一：FIG5A is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG5A , the present disclosure embodiment relates to a communication method for a communication system, the communication system including a terminal and a network device, and the method includes at least one of the following:

步骤5101、终端使用Non-3GPP接入技术接入第一网络时，网络设备向终端发送第一信息、第二信息、第三信息、第四信息中的至少之一；Step 5101: When a terminal accesses a first network using a Non-3GPP access technology, a network device sends at least one of first information, second information, third information, and fourth information to the terminal;

步骤5102、终端使用Non-3GPP接入技术接入第一网络时，终端接收网络设备发送的第一信息、第二信息、第三信息、第四信息中的至少之一；Step 5102: When the terminal accesses the first network using the Non-3GPP access technology, the terminal receives at least one of the first information, the second information, the third information, and the fourth information sent by the network device;

步骤5101-步骤5102的可选实现方式可以参见上述实施例介绍。The optional implementation methods of step 5101-step 5102 can refer to the introduction of the above embodiment.

在一些实施例中，上述方法可以包括上述通信系统侧、终端侧、网络设备侧等的实施例所述的方法，此处不再赘述。In some embodiments, the above method may include the method described in the above embodiments of the communication system side, terminal side, network device side, etc., which will not be repeated here.

本公开实施例所涉及的通信方法可以包括步骤S5101～步骤S5102中的至少一者。例如，步骤S5101可以作为独立实施例来实施，步骤S5102可以作为独立实施例来实施，但不限于此。The communication method involved in the embodiment of the present disclosure may include at least one of step S5101 to step S5102. For example, step S5101 may be implemented as an independent embodiment, and step S5102 may be implemented as an independent embodiment, but is not limited thereto.

以下为对上述方法的示例性介绍。The following is an exemplary introduction to the above method.

本公开方法的适用场景包括：The applicable scenarios of the disclosed method include:

场景1： Scenario 1:

相同网络下，不同地区支持的切换能力不同，每次注册VoWiFi时更新网络切换能力，可以让终端设备提前识别，并作相应应对机制。Under the same network, different regions support different switching capabilities. Updating the network switching capabilities each time you register for VoWiFi allows terminal devices to identify in advance and take corresponding response mechanisms.

场景2：Scenario 2:

对于初始布网VoWiFi能力(ePDG/N3IWF)运营商,经常出现特定基站或区域出现问题，通过实时变更下发信令，阻止终端设备在该地区进行切换或驻留。For operators with initial deployment of VoWiFi capabilities (ePDG/N3IWF), problems often occur in specific base stations or areas. By changing the signaling in real time, terminal devices are prevented from switching or staying in the area.

可选地，图5B是根据本公开实施例示出的切换能力信息的交互示意图。Optionally, FIG5B is a schematic diagram of the interaction of switching capability information according to an embodiment of the present disclosure.

如图5N所示，1.设备终端发起VoWiFi注册时，ePDG/N3IWF通过IKE_SA_INIT下发Payload Notify附带ePDG/N3IWF/EPC/5GC之间的切换能力，As shown in Figure 5N, 1. When the device terminal initiates VoWiFi registration, ePDG/N3IWF sends Payload Notify through IKE_SA_INIT with the switching capability between ePDG/N3IWF/EPC/5GC.

Payload Notify:Payload Notify:

HO_ePDG_EPC/HO_ePDG_5GC/HO_N3IWF_EPC/HO_N3IWF_5GC。其中，HO_ePDG_EPC指：从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入4G网络的切换能力；HO_ePDG_5GC指：从使用Non-3GPP接入技术接入4G网络切换至使用3GPP接入技术接入5GC(或称为5GCN)的切换能力；HO_N3IWF_EPC指：从使用Non-3GPP接入技术接入5GC(或称为5GCN、5G网络)切换至使用3GPP接入技术接入4G网络的切换能力；HO_N3IWF_5GC指：从使用Non-3GPP接入技术接入5GC(或称为5GCN)切换至使用3GPP接入技术接入5GC(或称为5GCN)的切换能力。HO_ePDG_EPC/HO_ePDG_5GC/HO_N3IWF_EPC/HO_N3IWF_5GC. Among them, HO_ePDG_EPC refers to the switching capability from accessing 4G network using Non-3GPP access technology to accessing 4G network using 3GPP access technology; HO_ePDG_5GC refers to the switching capability from accessing 4G network using Non-3GPP access technology to accessing 5GC (or 5GCN) using 3GPP access technology; HO_N3IWF_EPC refers to the switching capability from accessing 5GC (or 5GCN, 5G network) using Non-3GPP access technology to accessing 4G network using 3GPP access technology; HO_N3IWF_5GC refers to the switching capability from accessing 5GC (or 5GCN) using Non-3GPP access technology to accessing 5GC (or 5GCN) using 3GPP access technology.

2.终端设备针对不同能力进行场景规避2. Terminal devices avoid scenarios based on different capabilities

图5C是根据本公开实施例示出的通信方法的交互示意图。如图5C所示，该方法可以包括：当SA下驻留VoWiFi(即使用Non-3GPP接入技术接入5G网络)时，若终端支持HO_N3IWF_EPC，则当需要从Non-3GPP接入技术切换至3GPP接入技术时，可以执行N3IWF与5GC之间的切换，若终端不支持HO_N3IWF_EPC，当终端处于空闲态(IDLE)时，若需要从Non-3GPP接入技术切换至3GPP接入技术，终端去注册5GC；当终端处于连接态(Connect)、且终端支持HO_ePDG_EPC时，若需要从Non-3GPP接入技术切换至3GPP接入技术，则终端回落至LTE下VoWiFi，即：终端从使用Non-3GPP接入技术接入5G网络切换至使用Non-3GPP接入技术接入4G网络；当终端处于连接态(Connect)、且终端不支持HO_ePDG_EPC时，若需要从Non-3GPP接入技术切换至3GPP接入技术，则终端去注册5GC，并基于3GPP接入技术重注册至4G网络或5G网络，以切换发起VoNR通话或VoLTE通话，并可以将VoWiFi优先级设为最低，以在VoNR通话或VoLTE通话或电路交换(Circuit Switch，CS)域网络语音之后，尽量规避VoWiFi驻留。Figure 5C is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 5C, the method may include: when VoWiFi resides under SA (i.e., using Non-3GPP access technology to access the 5G network), if the terminal supports HO_N3IWF_EPC, when it is necessary to switch from Non-3GPP access technology to 3GPP access technology, switching between N3IWF and 5GC can be performed; if the terminal does not support HO_N3IWF_EPC, when the terminal is in an idle state (IDLE), if it is necessary to switch from Non-3GPP access technology to 3GPP access technology, the terminal deregisters 5GC; when the terminal is in a connected state (Connect) and the terminal supports HO_ePDG_EPC, if it is necessary to switch from Non-3GPP access technology to 3GPP access technology, the terminal falls back To VoWiFi under LTE, that is: the terminal switches from accessing the 5G network using Non-3GPP access technology to accessing the 4G network using Non-3GPP access technology; when the terminal is in a connected state (Connect) and the terminal does not support HO_ePDG_EPC, if it is necessary to switch from Non-3GPP access technology to 3GPP access technology, the terminal deregisters with 5GC and re-registers with the 4G network or 5G network based on the 3GPP access technology to switch to initiate a VoNR call or a VoLTE call, and the VoWiFi priority can be set to the lowest to avoid VoWiFi retention as much as possible after a VoNR call or a VoLTE call or a circuit switched (Circuit Switch, CS) domain network voice.

可选地，4G下VoWIFI(即使用Non-3GPP接入技术接入4G网络)注册处理逻辑及切换功能判断与上图5C流程类似。Optionally, the registration processing logic and switching function judgment of VoWIFI under 4G (i.e., using Non-3GPP access technology to access the 4G network) are similar to the process in Figure 5C above.

本公开实施例还提出用于实现以上任一方法的装置，例如，提出一装置，上述装置包括用以实现以上任一方法中终端所执行的各步骤的单元或模块。再如，还提出另一装置，包括用以实现以上任一方法中网络设备(例如接入网设备、核心网功能节点、核心网设备等)所执行的各步骤的单元或模块。The embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device is proposed, the above device includes a unit or module for implementing each step performed by the terminal in any of the above methods. For another example, another device is also proposed, including a unit or module for implementing each step performed by a network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.

应理解以上装置中各单元或模块的划分仅是一种逻辑功能的划分，在实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。此外，装置中的单元或模块可以以处理器调用软件的形式实现：例如装置包括处理器，处理器与存储器连接，存储器中存储有指令，处理器调用存储器中存储的指令，以实现以上任一方法或实现上述装置各单元或模块的功能，其中处理器例如为通用处理器，例如中央处理单元(Central Processing Unit，CPU)或微处理器，存储器为装置内的存储器或装置外的存储器。或者，装置中的单元或模块可以以硬件电路的形式实现，可以通过对硬件电路的设计实现部分或全部单元或模块的功能，上述硬件电路可以理解为一个或多个处理器；例如，在一种实现中，上述硬件电路为专用集成电路(application-specific integrated circuit，ASIC)，通过对电路内元件逻辑关系的设计，实现以上部分或全部单元或模块的功能；再如，在另一种实现中，上述硬件电路为可以通过可编程逻辑器件(programmable logic device，PLD)实现，以现场可编程门阵列(Field Programmable Gate Array，FPGA)为例，其可以包括大量逻辑门电路，通过配置文件来配置逻辑门电路之间的连接关系，从而实现以上部分或全部单元或模块的功能。以上装置的所有单元或模块可以全部通过处理器调用软件的形式实现，或全部通过硬件电路的形式实现，或部分通过处理器调用软件的形式实现，剩余部分通过硬件电路的形式实现。 It should be understood that the division of the units or modules in the above device is only a division of logical functions, and in actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. In addition, the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and instructions are stored in the memory. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above hardware circuits can be understood as one or more processors; for example, in one implementation, the above hardware circuit is an application-specific integrated circuit (ASIC), and the functions of some or all of the above units or modules are realized by designing the logical relationship of the components in the circuit; for example, in another implementation, the above hardware circuit can be realized by a programmable logic device (PLD), taking a field programmable gate array (FPGA) as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to realize the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of a processor calling software, or in the form of a hardware circuit, or in part by a processor calling software, and the rest by a hardware circuit.

在本公开实施例中，处理器是具有信号处理能力的电路，在一种实现中，处理器可以是具有指令读取与运行能力的电路，例如中央处理单元(Central Processing Unit，CPU)、微处理器、图形处理器(graphics processing unit，GPU)(可以理解为微处理器)、或数字信号处理器(digital signal processor，DSP)等；在另一种实现中，处理器可以通过硬件电路的逻辑关系实现一定功能，上述硬件电路的逻辑关系是固定的或可以重构的，例如处理器为专用集成电路(application-specific integrated circuit，ASIC)或可编程逻辑器件(programmable logic device，PLD)实现的硬件电路,例如FPGA。在可重构的硬件电路中，处理器加载配置文档，实现硬件电路配置的过程，可以理解为处理器加载指令，以实现以上部分或全部单元或模块的功能的过程。此外，还可以是针对人工智能设计的硬件电路，其可以理解为ASIC，例如神经网络处理单元(Neural Network Processing Unit，NPU)、张量处理单元(Tensor Processing Unit，TPU)、深度学习处理单元(Deep learning Processing Unit，DPU)等。In the disclosed embodiments, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit may be fixed or reconfigurable, such as a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration may be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as Neural Network Processing Unit (NPU), Tensor Processing Unit (TPU), Deep Learning Processing Unit (DPU), etc.

图6A是本公开实施例提出的终端的结构示意图。如图6A所示，包括：FIG6A is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure. As shown in FIG6A , it includes:

可选地，上述接收模块用于执行以上任一方法中终端执行的与“接收”有关的步骤，可选地，终端还包括发送模块、处理模块中的至少之一，上述发送模块用于执行以上任一方法中终端执行的与“发送”有关的步骤，此处不再赘述。上述处理模块用于执行以上任一方法中终端执行的与处理有关的步骤，此处不再赘述。Optionally, the receiving module is used to execute the steps related to "receiving" executed by the terminal in any of the above methods. Optionally, the terminal further includes at least one of a sending module and a processing module. The sending module is used to execute the steps related to "sending" executed by the terminal in any of the above methods, which will not be repeated here. The processing module is used to execute the steps related to processing executed by the terminal in any of the above methods, which will not be repeated here.

图6B是本公开实施例提出的网络设备的结构示意图。如图6B所示，包括：FIG6B is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure. As shown in FIG6B , it includes:

可选地，上述发送模块用于执行以上任一方法中网络设备执行的与“发送”有关的步骤，可选地，网络设备还包括处理模块、接收模块中的至少之一，上述处理模块用于执行以上任一方法中网络设备执行的与“处理”有关的步骤，此处不再赘述。上述接收模块用于执行以上任一方法中网络设备执行的与接收有关的步骤，此处不再赘述。Optionally, the sending module is used to execute the steps related to "sending" executed by the network device in any of the above methods. Optionally, the network device further includes at least one of a processing module and a receiving module. The processing module is used to execute the steps related to "processing" executed by the network device in any of the above methods, which will not be described in detail here. The receiving module is used to execute the steps related to receiving executed by the network device in any of the above methods, which will not be described in detail here.

图7A是本公开实施例提出的通信设备7100的结构示意图。通信设备7100可以是网络设备(例如接入网设备、核心网设备等)，也可以是终端(例如用户设备等)，也可以是支持网络设备实现以上任一方法的芯片、芯片系统、或处理器等，还可以是支持终端实现以上任一方法的芯片、芯片系统、或处理器等。通信设备7100可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。FIG7A is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. The communication device 7100 may be a network device (such as an access network device, a core network device, etc.), or a terminal (such as a user device, etc.), or a device that supports the network device to implement any of the above. The communication device 7100 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

如图7A所示，通信设备7100包括一个或多个处理器7101。处理器7101可以是通用处理器或者专用处理器等，例如可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、基带芯片，终端设备、终端设备芯片，DU或CU等)进行控制，执行程序，处理程序的数据。处理器7101用于调用指令以使得通信设备7100执行以上任一方法。As shown in FIG. 7A , the communication device 7100 includes one or more processors 7101. The processor 7101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program. The processor 7101 is used to call instructions so that the communication device 7100 executes any of the above methods.

在一些实施例中，通信设备7100还包括用于存储指令的一个或多个存储器7102。可选地，全部或部分存储器7102也可以处于通信设备7100之外。In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memory 7102 may also be outside the communication device 7100.

在一些实施例中，通信设备7100还包括一个或多个收发器7103。在通信设备7100包括一个或多个收发器7103时，上述方法中的发送接收等通信步骤由收发器7103执行，其他步骤由处理器7101执行。In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the communication steps such as sending and receiving in the above method are executed by the transceiver 7103, and the other steps are executed by the processor 7101.

在一些实施例中，收发器可以包括接收器和发送器，接收器和发送器可以是分离的，也可以集成在一起。可选地，收发器、收发单元、收发机、收发电路等术语可以相互替换，发送器、发送单元、发送机、发送电路等术语可以相互替换，接收器、接收单元、接收机、接收电路等术语可以相互替换。In some embodiments, the transceiver may include a receiver and a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

可选地，通信设备7100还包括一个或多个接口电路7104，接口电路7104与存储器7102连接，接口电路7104可用于从存储器7102或其他装置接收信号，可用于向存储器7102或其他装置发送信号。例如，接口电路7104可读取存储器7102中存储的指令，并将该指令发送给处理器7101。Optionally, the communication device 7100 further includes one or more interface circuits 7104, which are connected to the memory 7102. The interface circuit 7104 can be used to receive signals from the memory 7102 or other devices, and can be used to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 can read instructions stored in the memory 7102 and send the instructions to the processor 7101.

以上实施例描述中的通信设备7100可以是网络设备或者终端，但本公开中描述的通信设备7100的范围并不限于此，通信设备7100的结构可以不受图7a的限制。通信设备可以是独立的设备或者可以是较大设备的一部分。例如所述通信设备可以是：1)独立的集成电路IC，或芯片，或，芯片系统或子系统；(2)具有一个或多个IC的集合，可选地，上述IC集合也可以包括用于存储数据，程序的存储部件；(3)ASIC，例如调制解调器(Modem)；(4)可嵌入在其他设备内的模块；(5)接收机、终端设备、智能终端设备、蜂窝电话、无线设备、手持机、移动单元、车载设备、网络设备、云设备、人工智能设备等等；(6)其他等等。The communication device 7100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

图7B是本公开实施例提出的芯片7200的结构示意图。对于通信设备7100可以是芯片或芯片系统的情况，可以参见图7B所示的芯片7200的结构示意图，但不限于此。7B is a schematic diagram of the structure of a chip 7200 provided in an embodiment of the present disclosure. In the case where the communication device 7100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 7200 shown in FIG. 7B , but the present disclosure is not limited thereto.

芯片7200包括一个或多个处理器7201，处理器7201用于调用指令以使得芯片7200执行以上任一方法。The chip 7200 includes one or more processors 7201, and the processor 7201 is used to call instructions so that the chip 7200 executes any of the above methods.

在一些实施例中，芯片7200还包括一个或多个接口电路7202，接口电路7202与存储器7203连接，接口电路7202可以用于从存储器7203或其他装置接收信号，接口电路7202可用于向存储器7203或其他装置发送信号。例如，接口电路7202可读取存储器7203中存储的指令，并将该指令发送给处理器7201。可选地，接口电路、接口、收发管脚、收发器等术语可以相互替换。In some embodiments, the chip 7200 further includes one or more interface circuits 7202, which are connected to the memory 7203. The interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and the interface circuit 7202 can be used to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201. Optionally, the terms such as interface circuit, interface, transceiver pin, and transceiver can be replaced with each other.

在一些实施例中，芯片7200还包括用于存储指令的一个或多个存储器7203。可选地，全部或部分存储器7203可以处于芯片7200之外。In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Optionally, all or part of the memory 7203 may be outside the chip 7200.

本公开还提出存储介质，上述存储介质上存储有指令，当上述指令在通信设备7100上运行时，使得通信设备7100执行以上任一方法。可选地，上述存储介质是电子存储介质。可选地，上述存储介质是计算机可读存储介质，但不限于此，其也可以是其他装置可读的存储介质。可选地，上述存储介质可以是非暂时性(non-transitory)存储介质，但不限于此，其也可以是暂时性存储介质。The present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.

本公开还提出程序产品，上述程序产品被通信设备7100执行时，使得通信设备7100执行以上任一方法。可选地，上述程序产品是计算机程序产品。The present disclosure also proposes a program product, which, when executed by the communication device 7100, enables the communication device 7100 to execute any of the above methods. Optionally, the program product is a computer program product.

本公开还提出计算机程序，当其在计算机上运行时，使得计算机执行以上任一方法。The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to execute any one of the above methods.

在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序。在计算机上加载和执行所述计算机程序时，全部或部分地产生按照本公开实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机程序可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, the process or function described in the embodiment of the present disclosure is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program may 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 program may be transmitted from a website, a computer, a server or a data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line) connection. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)).

本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。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 disclosure.

所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。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.

以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。 The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

A communication method, characterized in that the method comprises:

When the terminal uses a non-3GPP access technology to access the first network, the terminal receives at least one of the first information, the second information, the third information, and the fourth information sent by the network device;

The first information is used to indicate whether the network device supports the terminal to perform a first handover; the first handover includes: the terminal switches from accessing the first network using a Non-3GPP access technology to accessing the first network using a 3GPP access technology;

The second information is used to indicate whether the network device supports the terminal to perform a second handover; the second handover includes: the terminal switches from accessing a first network using a Non-3GPP access technology to accessing a second network using a 3GPP access technology, and the second network is a network other than the first network;

The third information is used to indicate whether the network device supports the terminal to perform a third handover; the third handover includes: the terminal switches from accessing the second network using the Non-3GPP access technology to accessing the first network using the 3GPP access technology;

The fourth information is used to indicate whether the network device supports the terminal to perform a fourth handover; the fourth handover includes: the terminal switches from accessing the second network using the Non-3GPP access technology to accessing the second network using the 3GPP access technology.

The method according to claim 1, characterized in that the first network is a fifth generation mobile communication system 5G network, and the 5G network includes a 5G core network 5GCN;

The second network is a fourth generation mobile communication system 4G network, and the 4G network includes a 4G core network EPC.

The method according to claim 1, wherein the first network is a 4G network, and the 4G network includes a 4G core network EPC;

The second network is a 5G network, and the 5G network includes a 5G core network 5GCN.

The method according to any one of claims 1 to 3, characterized in that the method further comprises at least one of the following:

The first information indicates that the network device supports the terminal to perform a first handover, and/or the second information indicates that the network device supports the terminal to perform a second handover, and when the terminal needs to access the network through a 3GPP access technology, the terminal performs the first handover or the second handover;

The first information indicates that the network device does not support the terminal to perform the first handover, and the second information indicates that the network device does not support the terminal to perform the second handover. If the terminal is in an idle state, when the terminal needs to access the network through the 3GPP access technology, the terminal registers the first network and re-registers to the first network or the second network through the 3GPP access technology;

The first information indicates that the network device does not support the terminal to perform a first handover, and the second information indicates that the network device does not support the terminal to perform a second handover, and when the third information indicates that the network device supports the terminal to perform a third handover, and/or the fourth information indicates that the network device supports the terminal to perform a fourth handover, if the terminal is in a connected state, the terminal uses a Non-3GPP access technology to switch access to the second network, and when the terminal needs to access the network through a 3GPP access technology, the terminal performs the third handover or the fourth handover;

The first information indicates that the network device does not support the terminal to execute the first switching, the second information indicates that the network device does not support the terminal to execute the second switching, the third information indicates that the network device does not support the terminal to execute the third switching, and the fourth information indicates that the network device does not support the terminal to execute the fourth switching. If the terminal is in a connected state, when the terminal needs to access the network through 3GPP access technology, the terminal registers with the first network and re-registers to the first network or the second network through 3GPP access technology, and/or reduces the priority of the first service, which is the service executed when accessing the first network or the second network using Non-3GPP access technology.

The method according to claim 4 is characterized in that the first service includes a voice VoWiFi service based on a wireless fidelity network.

A communication method, characterized in that the method comprises:

When the terminal accesses the first network using the Non-3GPP access technology, the network device sends at least one of the first information, the second information, the third information, and the fourth information to the terminal;

The second information is used to indicate whether the network device supports the terminal to perform a second handover; the second handover includes: The terminal switches from accessing a first network using a Non-3GPP access technology to accessing a second network using a 3GPP access technology, where the second network is a network other than the first network;

The method according to claim 6, wherein the first network is a fifth generation mobile communication system 5G network, and the 5G network includes a 5G core network 5GCN;

The method according to claim 6, wherein the first network is a 4G network, and the 4G network includes a 4G core network EPC;

A communication method, characterized in that it is used in a communication system, the communication system includes a network device and a terminal, and the method includes at least one of the following:

When the terminal accesses the first network using the Non-3GPP access technology, the terminal receives at least one of the first information, the second information, the third information, and the fourth information sent by the network device;

A terminal, comprising:

A receiving module, configured to receive at least one of first information, second information, third information, and fourth information sent by a network device when the terminal accesses the first network using a Non-3GPP access technology;

A network device, comprising:

a sending module, configured to send at least one of the first information, the second information, the third information, and the fourth information to the terminal when the terminal accesses the first network using the Non-3GPP access technology;

A communication device, comprising:

one or more processors;

The one or more processors are used to call instructions so that the communication device executes the communication method described in any one of claims 1-5 and 6-8.

A communication system, characterized in that it includes a terminal and a network device, wherein the terminal is configured to implement the communication method described in any one of claims 1 to 5, and the network device is configured to implement the communication method described in any one of claims 6 to 8.

A storage medium storing instructions, characterized in that when the instructions are executed on a communication device, the communication device executes the communication method as described in any one of claims 1-5 and 6-8.