Service data processing method and communication device

Abstract

Provided are a service data processing method and a communication device, the method being applied to a mobile communication device comprising a first UE and a second UE, the method comprising: the mobile communication device establishing a first session of the first UE; the mobile communication equipment transmits service data corresponding to the first IP address through the first session of the first UE; the mobile communication equipment sends a first message, the second session establishment request is used for requesting to establish a second session of the second UE, and the first message is used for requesting to switch service data of the first session of the first UE to the second session of the second UE for transmission; and the mobile communication equipment transmits the service data corresponding to the first IP address through the second session of the second UE. Based on the method, the first session of the first UE and the second session of the second UE share the same IP address, and the IP addresses used by the service data before and after switching between the UEs are unchanged, so that the service continuity can be kept.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a service data processing method and a communication device. Background Art

[0002] A user equipment (UE), a radio access network (RAN), a user plane function (UPF), and a data network (DN) are generally referred to as data plane network functions and entities. The data traffic of a user can be transmitted through a protocol data unit (PDU) session established between the UE and the DN, and the transmission will pass through the two network function entities of the RAN and the UPF.

[0003] In a communication system, there may be a situation where a mobile communication device may include multiple UEs. For example, a mobile communication device includes UE1 and UE2. Among them, UE1 and UE2 can access the same or different networks through different RANs. For example, as Figure 1 shown, UE1 accesses the network through access network device 1, and UE2 accesses the network through access network device 2. UE1 can establish session 1 passing through the UPF through access network device 1, and UE1 transmits service data with the DN through this session 1. If the signal between UE1 and access network device 1 deteriorates, the mobile communication device can switch the service data of session 1 from UE1 to UE2 for transmission. How to realize the transmission switching of service data between different UEs in a mobile communication device and ensure the continuity of service data is a technical problem to be solved urgently at present. Summary of the Invention

[0004] This application provides a service data processing method and a communication device, which can realize the transmission switching of service data between different UEs in a mobile communication device and ensure the continuity of service data.

[0005] In a first aspect, this application provides a service data processing method, which is applied to a mobile communication device. The mobile communication device includes a first user equipment UE and a second UE. The method is characterized in that the method includes:

[0006] The mobile communication device establishes a first session of a first UE, and this first session is associated with a first Internet Protocol (IP) address; the mobile communication device transmits service data corresponding to the first IP address through the first session of the first UE; the mobile communication device sends a first message, which carries information about the first session of the first UE, an identifier of a second session of a second UE, and a second session establishment request for requesting to establish the second session of the second UE. This first message is used to request to switch the service data of the first session of the first UE to be transmitted through the second session of the second UE; the mobile communication device transmits service data corresponding to the first IP address through the second session of the second UE.

[0007] It can be seen that, based on the method described in the first aspect, when establishing the second session of the second UE, information about the first session of the first UE, an identifier of the second session of the second UE, and a second session establishment request for establishing the second session of the second UE can be sent to the network side. In this way, the network side can share the first IP address associated with the first session of the first UE for use by the second session of the second UE, that is, the first session of the first UE and the second session of the second UE can share the same IP address. By enabling the first session of the first UE and the second session of the second UE to share the same IP address, the IP address used by the service data before and after the handover between UEs in the mobile communication device remains unchanged, and service continuity can be maintained.

[0008] In a possible embodiment, the specific implementation manner for the mobile communication device to establish the first session of the first UE is as follows: the mobile communication device selects the first UE according to the orientation policy information and establishes the first session of the first UE;

[0009] The orientation policy information includes: the first UE is the preferentially selected UE, or a UE priority list (the first UE has a higher priority than the second UE); or,

[0010] The orientation policy information includes: the first network is the preferentially selected network, or a network priority list (the first network has a higher priority than the second network); where the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0011] The orientation policy information includes: the first RAT is the preferentially selected RAT, or a RAT priority list (the first RAT has a higher priority than the second RAT); where the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE; or,

[0012] The orientation policy information includes: the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE). Accordingly, the orientation policy information indicates that the second UE is preferably selected to transmit the service data of the mobile communication device; or,

[0013] The orientation policy information includes: the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network); wherein, the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0014] The orientation policy information includes: the second RAT is the preferred RAT, or a RAT priority list (the priority of the second RAT is higher than that of the first RAT); wherein, the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE.

[0015] For example, assume that the orientation policy information includes that the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network). If the signal quality between the mobile communication device and the second access network device is poor, such as the signal quality is lower than the set signal threshold, the mobile communication device will not select the second UE. The mobile communication device selects the first UE based on the orientation policy information and the signal quality between the mobile communication device and the first access network device, wherein the signal quality between the mobile communication device and the first access network device is good or higher than the set signal threshold.

[0016] Based on this possible embodiment, it is possible to reasonably select one UE from multiple UEs in the mobile communication device to transmit service data. For example, the capabilities of the mobile communication device are limited and it cannot support multiple UEs to transmit service data simultaneously.

[0017] In a possible embodiment, the specific implementation manner for the mobile communication device to establish the first session of the first UE is: the mobile communication device sends the identifier of the first session of the first UE, the data network name DNN, the single network slice selection assistance information S-NSSAI, the first session establishment request, and the first indication information. The first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs.

[0018] Based on this possible embodiment, by sending the first indication information, it is beneficial for the network side to select a session management network element that supports the transmission of service data between different UEs for session management, facilitating subsequent processing.

[0019] In a possible embodiment, the mobile communication device may also receive second indication information, which indicates that the service data of the first session is allowed to be transmitted between different UEs, or indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs;

[0020] The specific implementation manner for the mobile communication device to send the first message is: the mobile communication device sends the first message according to the second indication information.

[0021] Based on this possible embodiment, it is beneficial for the mobile communication device to accurately determine whether it can transmit the service data of the first session between different UEs.

[0022] In a possible embodiment, the specific implementation manner for the mobile communication device to send the first message is: when the signal quality between the mobile communication device and the first access network device deteriorates, or when the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or when the quality of service (QoS) requirement of the first session of the first UE is not met, the mobile communication device sends the first message, and the first access network device corresponds to the first UE. Optionally, the deterioration of the signal quality between the mobile communication device and the first access network device may be that the signal quality between the mobile communication device and the first access network device has decreased by greater than or equal to the first value.

[0023] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirement of the first session of the first UE is not met, it is possible to switch to the second UE in a timely manner for the transmission of service data to ensure the transmission quality of the service data.

[0024] In another possible embodiment, the specific implementation manner for the mobile communication device to send the first message is: when the signal quality between the mobile communication device and the first access network device deteriorates, or when the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or when the quality of service (QoS) requirement of the first session of the first UE is not met, and when the signal quality between the mobile communication device and the second access network device is higher than the second threshold, the mobile communication device sends the first message, and the first access network device corresponds to the first UE.

[0025] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirements of the first session of the first UE are not met, and the signal quality between the second UE and the second access network device is good, it is possible to promptly switch to the second UE for the transmission of service data to ensure the transmission quality of the service data.

[0026] In one possible embodiment, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the DNN corresponding to the first session of the first UE, and the S-NSSAI corresponding to the first session of the first UE.

[0027] Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0028] In one possible embodiment, the first message further includes the subscriber concealment identifier SUCI of the first UE or the subscriber permanent identifier SUPI of the first UE.

[0029] Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0030] In one possible embodiment, the first message further includes a first handover indication, which is used to indicate that the service data of the first session of the first UE is switched to the second session of the second UE for transmission, or the first handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is switched to the second session of the second UE for transmission.

[0031] In a second aspect, the present application provides a method for processing service data, and the method includes:

[0032] The second network element receives a first message, which carries the information of the first session of the first user equipment UE, the identifier of the second session of the second UE, and a second session establishment request for requesting the establishment of the second session of the second UE. The first message is used to request to switch the service data of the first session of the first UE to the second session of the second UE for transmission; the second network element sends a second message to the session management network element based on the first message. The second message carries the subscriber permanent identifier SUPI of the first UE, the identifier of the first session, the SUPI of the second UE, the identifier of the second session, and the second session establishment request. The second message is used to request to switch the service data of the first session of the first UE to the second session of the second UE for transmission, and the session management network element is the network element that manages the first session of the first UE.

[0033] It can be seen that, based on the method described in the second aspect, when establishing the second session of the second UE, the second network element can receive the information of the first session of the first UE, the identifier of the second session of the second UE, and the second session establishment request for establishing the second session of the second UE, and send the identifier of the first session of the first UE, the identifier of the second session of the second UE, and this second session establishment request to the session management network element. In this way, the session management network element can share the first IP address associated with the first session of the first UE for use by the second session of the second UE, that is, the first session of the first UE and the second session of the second UE can share the same IP address. By enabling the first session of the first UE and the second session of the second UE to share the same IP address, the IP address used by the service data before and after the handover between UEs in the mobile communication device remains unchanged, and the service continuity can be maintained.

[0034] In a possible embodiment, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the data network name DNN corresponding to the first session of the first UE, and the single network slice selection assistance information S-NSSAI corresponding to the first session of the first UE.

[0035] Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0036] In a possible embodiment, the first message further includes the user concealed identifier SUCI of the first UE or the SUPI of the first UE.

[0037] Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0038] In a possible embodiment, the information of the first session of the first UE is the identifier of the first session of the first UE; the specific implementation manner for the second network element to send the second message to the session management network element based on the first message is: the second network element obtains the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session; where the device identifier information is the SUPI of the second UE, or the first message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends the second message to the session management network element.

[0039] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE, so as to send the second message to the session management network element.

[0040] In a possible embodiment, the specific implementation of the second network element obtaining the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session is as follows: The second network element sends the device identifier information and the identifier of the first session to the unified data management network element; The second network element receives the SUPI of the first UE and the identifier of the session management network element sent by the unified data management network element.

[0041] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0042] In a possible embodiment, the specific implementation of the second network element obtaining the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session is as follows: The second network element sends the device identifier information to the authentication service function network element or the unified data management network element; The second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; The second network element sends the SUPI of the first UE and the identifier of the first session to the unified data management network element; The second network element receives the identifier of the session management network element sent by the unified data management network element.

[0043] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0044] In a possible embodiment, the information of the first session of the first UE includes the DNN corresponding to the first session of the first UE and / or the S-NSSAI corresponding to the first session of the first UE; The specific implementation of the second network element sending the second message to the session management network element based on the first message is as follows: The second network element obtains the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE; Wherein, the device identifier information is the SUPI of the second UE, or the first message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; The second network element sends the second message to the session management network element.

[0045] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session, so as to send the second message to the session management network element.

[0046] In a possible embodiment, the specific implementation of the second network element obtaining the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE is as follows: The second network element sends the device identifier information and the information of the first session of the first UE to the unified data management network element; The second network element receives the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session sent by the unified data management network element.

[0047] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session.

[0048] In a possible embodiment, the specific implementation of the second network element obtaining the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE is as follows: The second network element sends the device identifier information to the authentication service function network element or the unified data management network element; The second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; The second network element sends the SUPI of the first UE and the information of the first session of the first UE to the unified data management network element; The second network element receives the identifier of the session management network element and the identifier of the first session sent by the unified data management network element.

[0049] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session.

[0050] In a possible embodiment, the first message and the second message further include a first handover indication, where the first handover indication is used to indicate to switch the service data of the first session of the first UE to the second session of the second UE for transmission, or the first handover indication is used to indicate to switch the service data of the first session of the UE associated with the second UE to the second session of the second UE for transmission.

[0051] In a third aspect, the present application provides a service data processing method, and the method includes:

[0052] The first network element receives the identifier of the first session of the first user equipment (UE), the data network name (DNN), the single network slice selection assistance information (S-NSSAI), the first session establishment request, and the first indication information. The first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs. The first network element selects a session management network element based on the first indication information, and the session management network element supports the transmission of service data between different UEs. The first network element sends the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the first session establishment request to the session management network element.

[0053] Based on the method described in the third aspect, by receiving the first indication information, it is beneficial for the first network element to select a session management network element that supports the transmission of service data between different UEs for session management, facilitating subsequent processing.

[0054] In a possible embodiment, the specific implementation manner for the first network element to send the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the first session establishment request to the session management network element is: the first network element sends the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, the first session establishment request, and the first indication information to the session management network element.

[0055] The first network element may also receive second indication information sent by the session management network element, and the second indication information indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs; and the first network element may also send the second indication information.

[0056] Based on this possible embodiment, it is beneficial for the session management network element to feedback to the mobile communication device whether the service data of the first session of the first UE supports transmission between different UEs.

[0057] In a fourth aspect, the present application provides a method for processing service data, and the method includes:

[0058] The session management network element receives a second message, which carries a user permanent identification SUPI of a first user equipment UE, an identification of a first session of the first UE, a SUPI of a second UE, an identification of a second session of the second UE, and a second session establishment request, wherein the second session establishment request is used to request to establish a second session of the second UE, and the second message is used to request to switch the service data of the first session of the first UE to the second session of the second UE for transmission, and the session management network element is a network element that manages the first session of the first UE; in response to the second message, the session management network element sends a first N4 session identification and address information of a second access network device to the user plane function network element, the first N4 session identification is an N4 session identification associated with the identification of the first session of the first UE, the first N4 session identification and the address information of the second access network device are used to indicate that the service data carried by the first IP address corresponding to the first N4 session identification is sent to the second access network device, and the second access network device is used to carry the second session of the second UE, and the first IP address is an IP address associated with the identification of the first session of the first UE.

[0059] It can be seen that based on the method described in the fourth aspect, when establishing the second session of the second UE, the session management network element can receive the identifier of the first session of the first UE, the identifier of the second session of the second UE, and the second session establishment request for establishing the second session of the second UE. In this way, the session management network element can share the first IP address associated with the first session of the first UE for use by the second session of the second UE, that is, the first session of the first UE and the second session of the second UE can share the same IP address. By making the first session of the first UE and the second session of the second UE share the same IP address, the IP address used by the service data before and after switching between UEs in the mobile communication device remains unchanged, and service continuity can be maintained.

[0060] In a possible embodiment, the session management network element may also store the association between the identifier of the first session of the first UE and the first IP address; and in response to the second message, store the association between the identifier of the second session of the second UE and the first IP address, and / or release the association between the identifier of the first session of the first UE and the first IP address. Storing the association between the identifier of the second session of the second UE and the first IP address can facilitate the subsequent management of the second session. Release the association between the identifier of the first session of the first UE and the first IP address is conducive to saving storage space.

[0061] In a possible embodiment, the session management network element may further store the association relationship between the identifier of the first session of the first UE and the first N4 session identifier; and in response to the second message, store the association relationship between the identifier of the second session of the second UE and the first N4 session identifier, and / or, release the association relationship between the identifier of the first session of the first UE and the first N4 session identifier. Storing the association relationship between the identifier of the second session of the second UE and the first N4 session identifier facilitates subsequent management of the second session. Releasing the association relationship between the identifier of the first session of the first UE and the first N4 session identifier helps save storage space.

[0062] In a possible embodiment, the session management network element may further send the address information of the user plane function network element to the second access network device, and / or, the session management network element triggers the release of the first session. In this way, the second access network device can send the service data of the second session of the second UE to the user plane function network element.

[0063] In a possible embodiment, the second message further includes a first handover indication, which is used to indicate that the service data of the first session of the first UE is switched to the second session of the second UE for transmission, or the first handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is switched to the second session of the second UE for transmission.

[0064] In a possible embodiment, before the session management network element receives the second message, the session management network element may further receive the SUPI of the first UE, the identifier of the first session, the data network name DNN, the single network slice selection assistance information S-NSSAI, the first session establishment request, and the first indication information. The first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs; the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs; the session management network element sends the second indication information, and the second indication information indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0065] Based on this possible embodiment, the session management network element can feedback to the mobile communication device whether the service data of the first session of the first UE supports transmission between different UEs, which is beneficial for the mobile communication device to accurately determine whether it can transmit the service data of the first session between different UEs.

[0066] In a possible embodiment, the specific implementation manner in which the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs is as follows: The session management network element determines, based on the local configuration of the DNN, that the service data corresponding to the first session of the first UE supports transmission between different UEs; or, the session management network element determines, based on the subscribed data or policy information corresponding to the first session, that the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0067] Based on this possible embodiment, the session management network element can accurately determine whether the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0068] In a fifth aspect, the present application provides a service data processing method, which is applied to a mobile communication device. The mobile communication device includes a first user equipment (UE) and a second UE. The method includes:

[0069] The mobile communication device establishes a first session of the first UE, and the first session is associated with a first Internet Protocol (IP) address; the mobile communication device transmits service data corresponding to the first IP address through the first session of the first UE; the mobile communication device sends a third message, and the third message carries information about the first session of the first UE and a second session establishment request for requesting to establish a first session of the second UE, and the third message is used to request to switch the service data of the first session of the first UE to be transmitted through the first session of the second UE; the mobile communication device transmits service data corresponding to the first IP address through the first session of the second UE.

[0070] It can be seen that, based on the method described in the fifth aspect, when establishing the first session of the second UE, information about the first session of the first UE and a second session establishment request for establishing the first session of the second UE can be sent to the network side, so that the network side can share the first IP address associated with the first session of the first UE for use by the first session of the second UE, that is, the first session of the first UE and the first session of the second UE can share the same IP address. By enabling the first session of the first UE and the first session of the second UE to share the same IP address, the IP address used by the service data before and after switching between UEs in the mobile communication device remains unchanged, and service continuity can be maintained.

[0071] In a possible embodiment, the specific implementation manner in which the mobile communication device establishes a first session of the first UE is as follows: The mobile communication device selects the first UE according to the directed policy information and establishes a first session of the first UE;

[0072] The directed policy information includes: the first UE is the preferentially selected UE, or a UE priority list (the priority of the first UE is higher than that of the second UE); or,

[0073] The orientation policy information includes: the first network is the preferred network, or a network priority list (the priority of the first network is higher than that of the second network); wherein, the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0074] The orientation policy information includes: the first RAT is the preferred RAT, or a RAT priority list (the priority of the first RAT is higher than that of the second RAT); wherein, the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE; or,

[0075] The orientation policy information includes: the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE). Accordingly, the orientation policy information indicates that the second UE is preferably selected to transmit the service data of the mobile communication device; or,

[0076] The orientation policy information includes: the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network); wherein, the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0077] The orientation policy information includes: the second RAT is the preferred RAT, or a RAT priority list (the priority of the second RAT is higher than that of the first RAT); wherein, the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE.

[0078] For example, assume that the orientation policy information includes that the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network). If the signal quality between the mobile communication device and the second access network device is poor, such as the signal quality is lower than the set signal threshold, the mobile communication device will not select the second UE. The mobile communication device selects the first UE based on the orientation policy information and the signal quality between the mobile communication device and the first access network device, wherein the signal quality between the mobile communication device and the first access network device is good or higher than the set signal threshold.

[0079] Based on this possible embodiment, it is possible to reasonably select one UE among multiple UEs in a mobile communication device to transmit service data. For example, the capabilities of the mobile communication device are limited and it cannot support multiple UEs to transmit service data simultaneously.

[0080] In a possible embodiment, the specific implementation manner for the mobile communication device to establish a first session of a first UE is as follows:

[0081] The mobile communication device sends the identifier of the first session of the first UE, the data network name DNN, the single network slice selection assistance information S-NSSAI, a first session establishment request, and a first indication information. The first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs.

[0082] Based on this possible embodiment, by sending the first indication information, it is beneficial for the network side to select a session management network element that supports the transmission of service data between different UEs for session management, facilitating subsequent processing.

[0083] In a possible embodiment, the mobile communication device may also receive a second indication information, which indicates that the service data of the first session is allowed to be transmitted between different UEs, or indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs;

[0084] The specific implementation manner for the mobile communication device to send a third message is: The mobile communication device sends a third message according to the second indication information.

[0085] Based on this possible embodiment, it is beneficial for the mobile communication device to accurately determine whether the service data of the first session can be transmitted between different UEs.

[0086] In a possible embodiment, the specific implementation manner for the mobile communication device to send a third message is:

[0087] When the signal quality between the mobile communication device and the first access network device deteriorates, or when the signal quality between the mobile communication device and the first access network device is lower than a first threshold, or when the quality of service QoS requirements of the first session of the first UE are not met, the mobile communication device sends a third message. Optionally, when the signal quality between the mobile communication device and the first access network device deteriorates, it may mean that the signal quality between the mobile communication device and the first access network device has decreased by greater than or equal to a first value.

[0088] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirements of the first session of the first UE are not met, it is possible to timely switch to the second UE for the transmission of service data to ensure the transmission quality of the service data.

[0089] In another possible embodiment, the specific implementation manner for the mobile communication device to send the third message is as follows: when the signal quality between the mobile communication device and the first access network device deteriorates, or the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or the quality of service (QoS) requirement of the first session of the first UE is not satisfied, and the signal quality between the mobile communication device and the second access network device is higher than the second threshold, the mobile communication device sends the third message, and the first access network device corresponds to the first UE.

[0090] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirement of the first session of the first UE is not satisfied, and the signal quality between the second UE and the second access network device is good, the service data can be timely switched to the second UE for transmission to ensure the transmission quality of the service data.

[0091] In one possible embodiment, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the DNN corresponding to the first session of the first UE, and the S-NSSAI corresponding to the first session of the first UE.

[0092] Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0093] In one possible embodiment, the third message further includes the user concealed identifier (SUCI) of the first UE or the user permanent identifier (SUPI) of the first UE.

[0094] Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0095] In one possible embodiment, the third message further includes a second handover indication, which is used to indicate that the service data of the first session of the first UE is switched to the first session of the second UE for transmission, or the second handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is switched to the first session of the second UE for transmission.

[0096] In a sixth aspect, the present application provides a service data processing method, which includes:

[0097] The second network element receives a third message, which carries information of a first session of a first user equipment (UE) and a second session establishment request for requesting to establish a first session of a second UE. The second session establishment request is used to request to switch the service data of the first session of the first UE to the first session of the second UE for transmission. The third message is used to request to switch the service data of the first session of the first UE to the second UE for transmission. The second network element sends a fourth message to the session management network element based on the third message. The fourth message carries the subscriber permanent identifier (SUPI) of the first UE, the identifier of the first session, the SUPI of the second UE, and the second session establishment request. The fourth message is used to request to switch the service data of the first session of the first UE to the second UE for transmission. The session management network element is the network element that manages the first session of the first UE.

[0098] It can be seen that, based on the method described in the sixth aspect, when establishing the first session of the second UE, the second network element can receive the information of the first session of the first UE and the second session establishment request for establishing the first session of the second UE, and send the identifier of the first session of the first UE, the SUPI of the second UE, and the second session establishment request to the session management network element. In this way, the session management network element can share the first IP address associated with the first session of the first UE for the first session of the second UE to use, that is, the first session of the first UE and the first session of the second UE can share the same IP address. By making the first session of the first UE and the first session of the second UE share the same IP address, the IP address used by the service data before and after switching between UEs in the mobile communication device remains unchanged, and the service continuity can be maintained.

[0099] In a possible embodiment, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the data network name (DNN) corresponding to the first session of the first UE, and the single network slice selection assistance information (NSSAI) corresponding to the first session of the first UE.

[0100] Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0101] In a possible embodiment, the third message further includes the subscriber concealed identifier (SUCI) of the first UE or the SUPI of the first UE.

[0102] Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0103] In a possible embodiment, the information of the first session of the first UE is the identifier of the first session of the first UE; the specific implementation of the second network element sending the fourth message to the session management network element based on the third message is as follows: the second network element obtains the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session; wherein, the device identifier information is the SUPI of the second UE, or the third message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends the fourth message to the session management network element.

[0104] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE, so as to send the fourth message to the session management network element.

[0105] In a possible embodiment, the specific implementation of the second network element obtaining the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session is as follows: the second network element sends the device identifier information and the identifier of the first session to the unified data management network element; the second network element receives the SUPI of the first UE and the identifier of the session management network element sent by the unified data management network element.

[0106] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0107] In a possible embodiment, the specific implementation of the second network element obtaining the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session is as follows: the second network element sends the device identifier information to the authentication service function network element or the unified data management network element; the second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; the second network element sends the SUPI of the first UE and the identifier of the first session to the unified data management network element; the second network element receives the identifier of the session management network element sent by the unified data management network element.

[0108] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0109] In a possible embodiment, the information of the first session of the first UE includes the DNN corresponding to the first session of the first UE and / or the NSSAI corresponding to the first session of the first UE; the specific implementation manner in which the second network element sends a fourth message to the session management network element based on the third message is as follows: the second network element obtains the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE; wherein, the device identifier information is the SUPI of the second UE, or the third message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends a fourth message to the session management network element.

[0110] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session, so as to send a fourth message to the session management network element.

[0111] In a possible embodiment, the specific implementation manner in which the second network element obtains the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE is as follows: the second network element sends the device identifier information and the information of the first session of the first UE to the unified data management network element; the second network element receives the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session sent by the unified data management network element.

[0112] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session.

[0113] In a possible embodiment, the specific implementation manner in which the second network element obtains the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE is as follows: the second network element sends the device identifier information to the authentication service function network element or the unified data management network element; the second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; the second network element sends the SUPI of the first UE and the information of the first session of the first UE to the unified data management network element; the second network element receives the identifier of the session management network element and the identifier of the first session sent by the unified data management network element.

[0114] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session.

[0115] In a possible embodiment, the third message and the fourth message further include a second handover indication, which is used to indicate to switch the service data of the first session of the first UE to the first session of the second UE for transmission, or the second handover indication is used to indicate to switch the service data of the first session of the UE associated with the second UE to the first session of the second UE for transmission.

[0116] In a seventh aspect, the present application provides a method for processing service data, and the method includes:

[0117] A session management network element receives a fourth message, which carries a subscriber permanent identifier (SUPI) of a first user equipment (UE), an identifier of a first session of the first UE, an SUPI of a second UE, and a second session establishment request for requesting to establish a first session of the second UE. The fourth message is used to request to switch the service data of the first session of the first UE to the first session of the second UE for transmission. The session management network element is a network element for managing the first session of the first UE. In response to the fourth message, the session management network element sends a first N4 session identifier and address information of a second access network device to a user plane function network element. The first N4 session identifier is an N4 session identifier associated with the identifier of the first session of the first UE. The first N4 session identifier and the address information of the second access network device are used to indicate to send the service data carried by a first IP address corresponding to the first N4 session identifier to the second access network device. The second access network device is used to carry the first session of the second UE. The first IP address is an IP address associated with the identifier of the first session of the first UE.

[0118] Based on the method described in the seventh aspect, when establishing the first session of the second UE, the session management network element may receive the identifier of the first session of the first UE, the SUPI of the second UE, and the second session establishment request for establishing the first session of the second UE. In this way, the session management network element can share the first IP address associated with the first session of the first UE for use by the first session of the second UE, that is, the first session of the first UE and the first session of the second UE can share the same IP address. By making the first session of the first UE and the first session of the second UE share the same IP address, the IP address used by the service data before and after the handover between UEs in the mobile communication device remains unchanged, and the service continuity can be maintained.

[0119] In a possible embodiment, in response to the fourth message, the session management network element may further store the association relationship between the identifier of the first session and the SUPI of the second UE. Storing the association relationship between the identifier of the first session and the SUPI of the second UE can facilitate subsequent management of the first session.

[0120] In a possible embodiment, the session management network element may further send the address information of the user plane function network element to the second access network device; and / or, the session management network element triggers the release of the first session of the first UE. In this way, the second access network device can send the service data of the first session of the second UE to the user plane function network element.

[0121] In a possible embodiment, the fourth message further includes a second handover indication, which is used to indicate that the service data of the first session of the first UE is switched to the first session of the second UE for transmission, or the second handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is switched to the first session of the second UE for transmission.

[0122] Before receiving the fourth message sent by the second network element, in a possible embodiment, the session management network element may further receive the SUPI of the first UE, the identifier of the first session, the data network name DNN, the single network slice selection assistance information S-NSSAI, the first session establishment request, and the first indication information. The first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs; the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs; the session management network element sends the second indication information to the first network element, and the second indication information indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0123] Based on this possible embodiment, the session management network element can feedback to the mobile communication device whether the service data of the first session of the first UE supports transmission between different UEs, which is beneficial for the mobile communication device to accurately determine whether it can transmit the service data of the first session between different UEs.

[0124] In a possible embodiment, the specific implementation manner for the session management network element to determine that the service data corresponding to the first session of the first UE supports transmission between different UEs is: the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs based on the local configuration of the DNN; or, the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs based on the subscribed data or policy information corresponding to the first session.

[0125] Based on this possible embodiment, the session management network element can accurately determine whether the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0126] In an eighth aspect, the present application provides a service data processing method, which is applied to a mobile communication device. The mobile communication device includes a first user equipment UE and a second UE. The method includes:

[0127] The mobile communication device establishes a first session of a first UE, and this first session is associated with a first Internet Protocol (IP) address; the mobile communication device transmits service data corresponding to the first IP address through the first session of the first UE; the mobile communication device establishes a second session of a second UE; the first session of the first UE is associated with the second session of the second UE; the mobile communication device sends a seventh message, which carries an identifier of the second session and is used to request to switch the service data of the first session of the first UE to be transmitted through the second session of the second UE; the mobile communication device transmits the service data corresponding to the first IP address through the second session of the second UE.

[0128] It can be seen that based on the method described in the eighth aspect, an association relationship can be established in advance between the first session of the first UE and the second session of the second UE, and subsequently, the handover transmission of service data among UEs in the mobile communication device can be triggered according to requirements. By establishing the association relationship between the first session of the first UE and the second session of the second UE, the first session of the first UE and the second session of the second UE can share the same IP address, and the IP address used before and after the handover of service data among UEs in the mobile communication device remains unchanged, thus maintaining service continuity. And establishing the association relationship between the first session of the first UE and the second session of the second UE in advance is beneficial to subsequently timely switching the service data to the second UE for transmission.

[0129] In a possible embodiment, the specific implementation manner for the mobile communication device to establish the first session of the first UE is: the mobile communication device selects the first UE according to the directional policy information and establishes the first session of the first UE;

[0130] The directional policy information includes: the first UE is the preferentially selected UE, or a UE priority list (the first UE has a higher priority than the second UE); or,

[0131] The directional policy information includes: the first network is the preferentially selected network, or a network priority list (the first network has a higher priority than the second network); where the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0132] The directional policy information includes: the first radio access technology (RAT) is the preferentially selected RAT, or a RAT priority list (the first RAT has a higher priority than the second RAT); where the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE; or,

[0133] The orientation policy information includes: the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE). Accordingly, the orientation policy information indicates that the second UE is preferably selected to transmit the service data of the mobile communication device; or,

[0134] The orientation policy information includes: the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network); wherein, the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0135] The orientation policy information includes: the second RAT is the preferred RAT, or a RAT priority list (the priority of the second RAT is higher than that of the first RAT); wherein, the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE.

[0136] For example, it is assumed that the orientation policy information includes that the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network). If the signal quality between the mobile communication device and the second access network device is poor, such as the signal quality is lower than the set signal threshold, the mobile communication device will not select the second UE. The mobile communication device selects the first UE based on the orientation policy information and the signal quality between the mobile communication device and the first access network device, wherein the signal quality between the mobile communication device and the first access network device is good or higher than the set signal threshold.

[0137] Based on this possible embodiment, it is possible to reasonably select one UE from multiple UEs in the mobile communication device to transmit service data. For example, the capabilities of the mobile communication device are limited and it cannot support multiple UEs to transmit service data simultaneously.

[0138] In a possible embodiment, the specific implementation manner for the mobile communication device to establish a first session of the first UE is:

[0139] The mobile communication device sends the identifier of the first session of the first UE, the data network name DNN, the single network slice selection assistance information S-NSSAI, the first session establishment request, and the first indication information. The first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs.

[0140] Based on this possible embodiment, by sending the first indication information, it is beneficial for the network side to select a session management network element that supports the transmission of service data between different UEs for session management, facilitating subsequent processing.

[0141] In a possible embodiment, the specific implementation manner for the mobile communication device to establish a second session of a second UE is as follows:

[0142] The mobile communication device sends a fifth message, which carries information of the first session of the first UE, an identifier of the second session of the second UE, and a second session establishment request for requesting to establish the second session of the second UE.

[0143] Based on this possible embodiment, it is beneficial to successfully establish the second session of the second UE and store the association relationship between the first session of the first UE and the second session of the second UE.

[0144] In a possible embodiment, the fifth message is used to request to associate the second session of the second UE with the first session of the first UE.

[0145] In a possible embodiment, the information of the first session of the first UE includes one or more of the following: an identifier of the first session of the first UE, a DNN corresponding to the first session of the first UE, and an S-NSSAI corresponding to the first session of the first UE.

[0146] Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0147] In a possible embodiment, the fifth message further includes a subscriber concealed identifier (SUCI) of the first UE or a subscriber permanent identifier (SUPI) of the first UE.

[0148] Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0149] In a possible embodiment, the mobile communication device may further receive a second indication information, which indicates that the service data of the first session is allowed to be transmitted between different UEs, or indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs.

[0150] The specific implementation manner for the mobile communication device to send the fifth message is: the mobile communication device sends the fifth message according to the second indication information.

[0151] Based on this possible embodiment, it is beneficial for the mobile communication device to accurately determine whether the service data of the first session can be transmitted between different UEs.

[0152] In a possible embodiment, the specific implementation manner for the mobile communication device to send a seventh message is:

[0153] When the signal quality between the mobile communication device and the first access network device deteriorates, or the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or the quality of service (QoS) requirements of the first session of the first UE are not met, the mobile communication device sends a seventh message.

[0154] Optionally, the deterioration of the signal quality between the mobile communication device and the first access network device may be that the signal quality between the mobile communication device and the first access network device has decreased by greater than or equal to a first value.

[0155] In another possible embodiment, the specific implementation manner for the mobile communication device to send the seventh message is as follows: when the signal quality between the mobile communication device and the first access network device deteriorates, or the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or the QoS requirements of the first session of the first UE are not met, and the signal quality between the mobile communication device and the second access network device is higher than the second threshold, the mobile communication device sends the seventh message, where the first access network device corresponds to the first UE.

[0156] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirements of the first session of the first UE are not met, and the signal quality between the second UE and the second access network device is good, the first UE can be switched to the second UE in a timely manner for the transmission of service data to ensure the transmission quality of the service data.

[0157] In a possible embodiment, the seventh message further includes a first handover indication, where the first handover indication is used to indicate that the service data of the first session of the first UE is switched to the second session of the second UE for transmission, or the first handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is switched to the second session of the second UE for transmission.

[0158] In a ninth aspect, the present application provides a method for processing service data, where the method includes:

[0159] The second network element receives the seventh message, where the seventh message carries the identifier of the second session, and the seventh message is used to request that the service data of the first session of the first UE be switched to the second session of the second UE for transmission; the first session of the first UE is associated with the second session of the second UE; the second network element sends an eighth message to the session management network element, where the eighth message carries first information, and the first information is used to indicate the second session of the second UE, and the eighth message is used to request that the service data of the first session of the first UE be switched to the second session of the second UE for transmission.

[0160] It can be seen that, based on the method described in the ninth aspect, an association relationship can be pre-established between the first session of the first UE and the second session of the second UE, and subsequently, the handover transmission of service data between UEs in the mobile communication device can be triggered according to requirements. By establishing the association relationship between the first session of the first UE and the second session of the second UE, the first session of the first UE and the second session of the second UE can share the same IP address, and the IP address used before and after the handover of service data between UEs in the mobile communication device remains unchanged, so that service continuity can be maintained. And pre-establishing the association relationship between the first session of the first UE and the second session of the second UE is conducive to subsequently switching the service data to the second UE for transmission in a timely manner.

[0161] In a possible embodiment, the first information includes the SUPI of the second UE and the identifier of the second session, or the first information is allocated by the session management network element and is used to identify the second session of the second UE.

[0162] In a possible embodiment, the second network element may further receive a fifth message, which carries the information of the first session of the first UE, the identifier of the second session of the second UE, and a second session establishment request for requesting the establishment of the second session of the second UE; and the second network element sends a sixth message to the session management network element based on the fifth message, and the sixth message carries the permanent user identifier SUPI of the first UE, the identifier of the first session, the SUPI of the second UE, the identifier of the second session, and the second session establishment request.

[0163] Based on this possible embodiment, it is beneficial to successfully establish the second session of the second UE and store the association relationship between the first session of the first UE and the second session of the second UE.

[0164] In a possible embodiment, the fifth message is used to request to associate the second session of the second UE with the first session of the first UE, and the sixth message is used to request to associate the second session of the second UE with the first session of the first UE.

[0165] In a possible embodiment, after the second network element receives the fifth message and before receiving the seventh message, the second network element may further record that the session management network element is responsible for the management of the second session of the second UE.

[0166] Based on this possible embodiment, it is beneficial for the second network element to timely determine the session management network element when receiving the seventh message, so that an eighth message can be sent to the session management network element.

[0167] In a possible embodiment, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the data network name (DNN) corresponding to the first session of the first UE, and the single network slice selection assistance information (S-NSSAI) corresponding to the first session of the first UE.

[0168] Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0169] In a possible embodiment, the fifth message further includes the subscriber concealed identifier (SUCI) of the first UE or the SUPI of the first UE.

[0170] Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0171] In a possible embodiment, the information of the first session of the first UE is the identifier of the first session of the first UE; the specific implementation manner for the second network element to send a sixth message to the session management network element based on the fifth message is: the second network element obtains the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session; wherein, the device identifier information is the SUPI of the second UE, or the fifth message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends the sixth message to the session management network element.

[0172] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE, so as to send the sixth message to the session management network element.

[0173] In a possible embodiment, the specific implementation manner for the second network element to obtain the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session is: the second network element sends the device identifier information and the identifier of the first session to the unified data management network element; the second network element receives the SUPI of the first UE and the identifier of the session management network element sent by the unified data management network element.

[0174] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0175] In a possible embodiment, the specific implementation for the second network element to obtain the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session is as follows: The second network element sends the device identifier information to the authentication service function network element or the unified data management network element; the second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; the second network element sends the SUPI of the first UE and the identifier of the first session to the unified data management network element; the second network element receives the identifier of the session management network element sent by the unified data management network element.

[0176] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0177] In a possible embodiment, the information of the first session of the first UE includes the DNN corresponding to the first session of the first UE and / or the NSSAI corresponding to the first session of the first UE; the specific implementation for the second network element to send the sixth message to the session management network element based on the fifth message is as follows: The second network element obtains the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE; wherein, the device identifier information is the SUPI of the second UE, or the fifth message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends the sixth message to the session management network element.

[0178] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session, so as to send the sixth message to the session management network element.

[0179] In a possible embodiment, the specific implementation for the second network element to obtain the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE is as follows: The second network element sends the device identifier information and the information of the first session of the first UE to the unified data management network element; the second network element receives the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session sent by the unified data management network element.

[0180] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session.

[0181] In a possible embodiment, the specific implementation of the second network element for obtaining the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE is as follows: The second network element sends the device identifier information to the authentication service function network element or the unified data management network element; the second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; the second network element sends the SUPI of the first UE and the information of the first session of the first UE to the unified data management network element; the second network element receives the identifier of the session management network element and the identifier of the first session sent by the unified data management network element.

[0182] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session.

[0183] In a possible embodiment, the seventh message and the eighth message further include a first handover indication, which is used to indicate that the service data of the first session of the first UE is switched to the second session of the second UE for transmission, or the first handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is switched to the second session of the second UE for transmission.

[0184] In a tenth aspect, the present application provides a service data processing method, which includes:

[0185] The session management network element stores the association relationship between the identifier of the second session of the second UE and the identifier of the first session of the first UE; the session management network element receives an eighth message, which carries first information used to indicate the second session of the second UE, and the eighth message is used to request to switch the service data of the first session of the first UE to the second session of the second UE for transmission; in response to the eighth message, the session management network element sends a first N4 session identifier and the address information of the second access network device to the user plane function network element, where the first N4 session identifier is the N4 session identifier associated with the identifier of the first session of the first UE and the identifier of the second session of the second UE, and the first N4 session identifier and the address information of the second access network device are used to indicate that the service data carried by the first IP address corresponding to the first N4 session identifier is sent to the second access network device, and the second access network device is used to carry the second session of the second UE, and the first IP address is the IP address associated with the identifier of the first session of the first UE and the identifier of the second session of the second UE.

[0186] It can be seen that based on the method described in the tenth aspect, the association relationship between the identifier of the first session of the first UE and the identifier of the second session of the second UE can be established in advance, and then the inter-UE handover transmission of service data can be triggered according to requirements. By establishing the association relationship between the identifier of the first session of the first UE and the identifier of the second session of the second UE, the first session of the first UE and the second session of the second UE can share the same IP address, and the IP address used before and after the inter-UE handover of service data in the mobile communication device remains unchanged, which can maintain service continuity. And establishing the association relationship between the identifier of the first session of the first UE and the identifier of the second session of the second UE in advance is beneficial to subsequent timely handover of service data to the second UE for transmission.

[0187] In a possible embodiment, the session management network element may further store the association relationship between the identifier of the first session of the first UE and the first IP address; in response to the eighth message, the session management network element may further store the association relationship between the identifier of the second session of the second UE and the first IP address, and / or, release the association relationship between the identifier of the first session of the first UE and the first IP address. Storing the association relationship between the identifier of the second session of the second UE and the first IP address can facilitate subsequent management of the second session. Releasing the association relationship between the identifier of the first session of the first UE and the first IP address is beneficial to saving storage space.

[0188] In a possible embodiment, the session management network element may further store the association relationship between the identifier of the first session of the first UE and the first N4 session identifier; in response to the eighth message, the session management network element may further store the association relationship between the identifier of the second session of the second UE and the first N4 session identifier, and / or, release the association relationship between the identifier of the first session of the first UE and the first N4 session identifier. Storing the association relationship between the identifier of the second session of the second UE and the first N4 session identifier can facilitate subsequent management of the second session. Releasing the association relationship between the identifier of the first session of the first UE and the first N4 session identifier is beneficial to saving storage space.

[0189] In a possible embodiment, the session management network element may further send the address information of the user plane function network element to the second access network device, and / or, the session management network element triggers the release of the first session. In this way, the second access network device can send the service data of the second session of the second UE to the user plane function network element.

[0190] In a possible embodiment, the session management network element may further receive a sixth message, which carries the subscriber permanent identifier (SUPI) of the first user equipment (UE), the identifier of the first session of the first UE, the SUPI of the second UE, the identifier of the second session of the second UE, and a second session establishment request for requesting the establishment of the second session of the second UE.

[0191] Specific implementation manner for the session management network element to store the association relationship between the identifier of the second session of the second UE and the identifier of the first session of the first UE: In response to the sixth message, the session management network element stores the association relationship between the identifier of the second session of the second UE and the identifier of the first session of the first UE.

[0192] Based on this possible embodiment, the second session of the second UE can be successfully established, as well as the association relationship between the first session of the first UE and the second session of the second UE.

[0193] In a possible embodiment, the sixth message is used to request to associate the second session of the second UE with the first session of the first UE.

[0194] In a possible embodiment, after the session management network element receives the sixth message and before receiving the eighth message, it may further record that the user plane transmission channel of the first session of the first UE is in an active state, and the user plane transmission channel of the second session of the second UE is in an inactive state.

[0195] In a possible embodiment, the first information includes the SUPI of the second UE and the identifier of the second session, or the first information is assigned by the session management network element and is used to identify the second session of the second UE.

[0196] In a possible embodiment, the eighth message further includes a first handover indication, which is used to indicate to switch the service data of the first session of the first UE to the second session of the second UE for transmission, or which is used to indicate to switch the service data of the first session of the UE associated with the second UE to the second session of the second UE for transmission.

[0197] In a possible embodiment, the session management network element may also receive the SUPI of the first UE, the identifier of the first session, the data network name DNN, the single network slice selection assistance information S-NSSAI, the first session establishment request, and the first indication information. The first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs; and the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs; and the session management network element sends second indication information, and the second indication information indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0198] Based on this possible embodiment, the session management network element can feedback to the mobile communication device whether the service data of the first session of the first UE supports transmission between different UEs, which is beneficial for the mobile communication device to accurately determine whether it can transmit the service data of the first session between different UEs.

[0199] In a possible embodiment, the specific implementation manner for the session management network element to determine that the service data corresponding to the first session of the first UE supports transmission between different UEs: The session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs based on the local configuration of the DNN; or, the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs based on the subscribed data or policy information corresponding to the first session.

[0200] Based on this possible embodiment, the session management network element can accurately determine whether the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0201] In the eleventh aspect, the present application provides a service data processing method, which is applied to a mobile communication device. The mobile communication device includes a first user equipment UE and a second UE. The method includes: The mobile communication device establishes a first session of the first UE, and the first session is associated with a first Internet protocol IP address; The mobile communication device transmits the service data corresponding to the first IP address through the first session of the first UE; The mobile communication device establishes a first session of the second UE; The first session of the first UE is associated with the first session of the second UE; The mobile communication device sends an eleventh message, and the eleventh message carries the identifier of the first session. The eleventh message is used to request to switch the service data of the first session of the first UE to the first session of the second UE for transmission; The mobile communication device transmits the service data corresponding to the first IP address through the first session of the second UE.

[0202] It can be seen that, based on the method described in the eleventh aspect, the association relationship between the first session of the first UE and the SUPI of the second UE can be established in advance, and then the handover transmission of service data between UEs in the mobile communication device can be triggered according to requirements. By establishing the association relationship between the first session of the first UE and the SUPI of the second UE, the first session of the first UE and the first session of the second UE can share the same IP address, and the IP address used before and after the handover of service data between UEs in the mobile communication device remains unchanged, so that the service continuity can be maintained. Moreover, establishing the association relationship between the first session of the first UE and the SUPI of the second UE in advance is beneficial to subsequent timely handover of service data to the second UE for transmission.

[0203] In a possible embodiment, the specific implementation manner for the mobile communication device to establish the first session of the first UE: The mobile communication device selects the first UE according to the orientation policy information and establishes the first session of the first UE;

[0204] The orientation policy information includes: the first UE is the preferentially selected UE, or the UE priority list (the first UE has a higher priority than the second UE); or,

[0205] The orientation policy information includes: the first network is the preferentially selected network, or the network priority list (the first network has a higher priority than the second network); where the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0206] The orientation policy information includes: the first RAT is the preferentially selected RAT, or the RAT priority list (the first RAT has a higher priority than the second RAT); where the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE; or,

[0207] The orientation policy information includes: the second UE is the preferentially selected UE, or the UE priority list (the second UE has a higher priority than the first UE). Correspondingly, the orientation policy information indicates that the second UE is preferentially selected to transmit the service data of the mobile communication device; or,

[0208] The orientation policy information includes: the second network is the preferentially selected network, or the network priority list (the second network has a higher priority than the first network); where the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0209] The orientation policy information includes: the second RAT is the preferred RAT, or an RAT priority list (the second RAT has a higher priority than the first RAT); wherein, the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE.

[0210] For example, it is assumed that the orientation policy information includes that the second UE is the preferred UE, or a UE priority list (the second UE has a higher priority than the first UE), or the second network is the preferred network, or a network priority list (the second network has a higher priority than the first network), or the second network is the preferred network, or a network priority list (the second network has a higher priority than the first network). If the signal quality between the mobile communication device and the second access network device is poor, such as the signal quality being lower than the set signal threshold, the mobile communication device will not select the second UE. The mobile communication device selects the first UE based on the orientation policy information and the signal quality between the mobile communication device and the first access network device, wherein the signal quality between the mobile communication device and the first access network device is good or higher than the set signal threshold.

[0211] Based on this possible embodiment, it is possible to reasonably select one UE from multiple UEs in the mobile communication device to transmit service data. For example, the capabilities of the mobile communication device are limited and it cannot support multiple UEs to transmit service data simultaneously.

[0212] In a possible embodiment, the specific implementation manner for the mobile communication device to establish the first session of the first UE:

[0213] The mobile communication device sends the identifier of the first session of the first UE, the data network name DNN, the single network slice selection assistance information S-NSSAI, the first session establishment request, and the first indication information. The first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs.

[0214] Based on this possible embodiment, by sending the first indication information, it is beneficial for the network side to select a session management network element that supports the transmission of service data between different UEs for session management, facilitating subsequent processing.

[0215] In a possible embodiment, the specific implementation manner for the mobile communication device to establish the first session of the second UE: The mobile communication device sends a ninth message, which carries the information of the first session of the first UE and the second session establishment request. The second session establishment request is used to request the establishment of the first session of the second UE.

[0216] Based on this possible embodiment, it is beneficial to successfully establish the first session of the second UE and store the association relationship between the first session of the first UE and the first session of the second UE.

[0217] In a possible embodiment, the ninth message is used to request to associate the first session of the second UE with the first session of the first UE.

[0218] In a possible embodiment, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the DNN corresponding to the first session of the first UE, and the S-NSSAI corresponding to the first session of the first UE.

[0219] Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0220] In a possible embodiment, the ninth message further includes the user concealment identifier SUCI of the first UE or the user permanent identifier SUPI of the first UE.

[0221] Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0222] In a possible embodiment, the mobile communication device receives second indication information, which indicates that the service data of the first session is allowed to be transmitted between different UEs, or indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs.

[0223] Specific implementation manner for the mobile communication device to send the ninth message: The mobile communication device sends the ninth message according to the second indication information.

[0224] Based on this possible embodiment, it is beneficial for the mobile communication device to accurately determine whether the service data of the first session can be transmitted between different UEs.

[0225] Specific implementation manner for the mobile communication device to send the eleventh message: When the signal quality between the mobile communication device and the first access network device deteriorates, or when the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or when the quality of service QoS requirement of the first session of the first UE is not met, the mobile communication device sends the eleventh message.

[0226] Optionally, the deterioration of the signal quality between the mobile communication device and the first access network device may be that the signal quality between the mobile communication device and the first access network device has decreased by greater than or equal to the first value.

[0227] In another possible embodiment, the specific implementation manner for the mobile communication device to send the eleventh message is as follows: when the signal quality between the mobile communication device and the first access network device deteriorates, or the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or the quality of service (QoS) requirement of the first session of the first UE is not met, and the signal quality between the mobile communication device and the second access network device is higher than the second threshold, the mobile communication device sends the eleventh message, and the first access network device corresponds to the first UE.

[0228] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirement of the first session of the first UE is not met, and the signal quality between the second UE and the second access network device is good, the service data can be timely switched to the second UE for transmission to ensure the transmission quality of the service data.

[0229] In a possible embodiment, the eleventh message further includes a second handover indication, which is used to indicate that the service data of the first session of the first UE is switched to the first session of the second UE for transmission, or the second handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is switched to the first session of the second UE for transmission.

[0230] In a twelfth aspect, the present application provides a method for processing service data, and the method includes:

[0231] The second network element receives the eleventh message, where the eleventh message carries the identifier of the first session, and the eleventh message is used to request to switch the service data of the first session of the first UE to the first session of the second UE for transmission; the first session of the first UE is associated with the first session of the second UE; the second network element sends a twelfth message to the session management network element, where the twelfth message carries second information, and the second information is used to indicate the first session of the second UE, and the twelfth message is used to request to switch the service data of the first session of the first UE to the first session of the second UE for transmission.

[0232] It can be seen that based on the method described in the twelfth aspect, the association relationship between the first session of the first UE and the SUPI of the second UE can be established in advance, and then the service data can be triggered to be switched between UEs in the mobile communication device according to requirements. By establishing the association relationship between the first session of the first UE and the SUPI of the second UE, the first session of the first UE and the first session of the second UE can share the same IP address, and the IP address used before and after the service data is switched between UEs in the mobile communication device remains unchanged, so that the service continuity can be maintained. And establishing the association relationship between the first session of the first UE and the first session of the second UE in advance is beneficial to timely switching the service data to the second UE for transmission subsequently.

[0233] In a possible embodiment, the second information includes the SUPI of the second UE and the identifier of the first session, or the second information is allocated by the session management network element and is used to identify the first session of the second UE.

[0234] In a possible embodiment, the second network element may further receive a ninth message, which carries the information of the first session of the first UE and a second session establishment request for requesting to establish the first session of the second UE; the second network element may further send a tenth message to the session management network element based on the ninth message, and the tenth message carries the permanent user identifier SUPI of the first UE, the identifier of the first session, the SUPI of the second UE, and the second session establishment request.

[0235] Based on this possible embodiment, it is beneficial to successfully establish the first session of the second UE and store the association relationship between the first session of the first UE and the first session of the second UE.

[0236] In a possible embodiment, the ninth message is used to request to associate the first session of the second UE with the first session of the first UE, and the tenth message is used to request to associate the first session of the second UE with the first session of the first UE.

[0237] In a possible embodiment, after the second network element receives the ninth message and before receiving the eleventh message, the second network element may further record that the session management network element is responsible for the management of the first session of the second UE.

[0238] In a possible embodiment, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the data network name DNN corresponding to the first session of the first UE, and the single network slice selection assistance information S-NSSAI corresponding to the first session of the first UE.

[0239] Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0240] In a possible embodiment, the ninth message further includes the user concealed identifier SUCI of the first UE or the SUPI of the first UE.

[0241] Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0242] In a possible embodiment, the information of the first session of the first UE is the identifier of the first session of the first UE; the specific implementation manner of the second network element sending the tenth message to the session management network element based on the ninth message:

[0243] The second network element obtains the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session; wherein, the device identifier information is the SUPI of the second UE, or the ninth message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends a tenth message to the session management network element.

[0244] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE, so as to send a tenth message to the session management network element.

[0245] In a possible embodiment, the specific implementation manner for the second network element to obtain the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session: The second network element sends the device identifier information and the identifier of the first session to the unified data management network element; the second network element receives the SUPI of the first UE and the identifier of the session management network element sent by the unified data management network element.

[0246] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0247] In a possible embodiment, the specific implementation manner for the second network element to obtain the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session: The second network element sends the device identifier information to the authentication service function network element or the unified data management network element; the second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; the second network element sends the SUPI of the first UE and the identifier of the first session to the unified data management network element; the second network element receives the identifier of the session management network element sent by the unified data management network element.

[0248] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0249] In a possible embodiment, the information of the first session of the first UE includes the DNN corresponding to the first session of the first UE and / or the NSSAI corresponding to the first session of the first UE; the specific implementation manner for the second network element to send a tenth message to the session management network element based on the ninth message:

[0250] The second network element obtains the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE; wherein, the device identifier information is the SUPI of the second UE, or the ninth message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends a tenth message to the session management network element.

[0251] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session, so as to send a tenth message to the session management network element.

[0252] In a possible embodiment, the specific implementation manner for the second network element to obtain the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE: The second network element sends the device identifier information and the information of the first session of the first UE to the unified data management network element; the second network element receives the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session sent by the unified data management network element.

[0253] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session.

[0254] In a possible embodiment, the specific implementation manner for the second network element to obtain the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE: The second network element sends the device identifier information to the authentication service function network element or the unified data management network element; the second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; the second network element sends the SUPI of the first UE and the information of the first session of the first UE to the unified data management network element; the second network element receives the identifier of the session management network element and the identifier of the first session sent by the unified data management network element.

[0255] Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session.

[0256] In a possible embodiment, the eleventh message and the twelfth message further include a second handover indication, which is used to indicate that the service data of the first session of the first UE is switched to the first session of the second UE for transmission, or the second handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is switched to the first session of the second UE for transmission.

[0257] In a thirteenth aspect, the present application provides a method for processing service data, the method including:

[0258] The session management network element stores the association relationship between the identifier of the first session of the first UE and the SUPI of the second UE; the session management network element receives a twelfth message, the twelfth message carrying second information, the second information being used to indicate the first session of the second UE, the twelfth message being used to request to switch the service data of the first session of the first UE to the first session of the second UE for transmission; in response to the twelfth message, the session management network element sends a first N4 session identifier and the address information of the second access network device to the user plane function network element, the first N4 session identifier being the N4 session identifier associated with the identifier of the first session of the first UE and the identifier of the first session of the second UE, the first N4 session identifier and the address information of the second access network device being used to indicate to send the service data carried by the first IP address corresponding to the first N4 session identifier to the second access network device, the second access network device being used to carry the first session of the second UE, the first IP address being the IP address associated with the identifier of the first session of the first UE and the identifier of the first session of the second UE.

[0259] It can be seen that based on the method described in the thirteenth aspect, the association relationship between the first session of the first UE and the SUPI of the second UE can be established in advance, and subsequent service data can be triggered to be switched and transmitted between UEs in the mobile communication device according to requirements. By establishing the association relationship between the first session of the first UE and the SUPI of the second UE, the first session of the first UE and the first session of the second UE can share the same IP address, and the IP address used before and after the switching of the service data between UEs in the mobile communication device remains unchanged, so that service continuity can be maintained. And establishing the association relationship between the first session of the first UE and the first session of the second UE in advance is beneficial to subsequent timely switching the service data to the second UE for transmission.

[0260] In a possible embodiment, the session management network element may further send the address information of the user plane function network element to the second access network device; and / or, the session management network element triggers the release of the first session of the first UE. In this way, the second access network device can send the service data of the first session of the second UE to the user plane function network element.

[0261] In a possible embodiment, the session management network element may also receive a tenth message, which carries the subscriber permanent identifier (SUPI) of the first user equipment (UE), the identifier of the first session of the first UE, the SUPI of the second UE, and a second session establishment request for requesting to establish the first session of the second UE; the specific implementation manner for the session management network element to store the association relationship between the identifier of the first session of the first UE and the SUPI of the second UE is: in response to the tenth message, the session management network element stores the association relationship between the identifier of the first session of the first UE and the SUPI of the second UE.

[0262] Based on this possible embodiment, the first session of the second UE can be successfully established, as well as the association relationship between the first session of the first UE and the first session of the second UE.

[0263] In a possible embodiment, the tenth message is used to request to associate the first session of the second UE with the first session of the first UE.

[0264] In a possible embodiment, after the session management network element receives the tenth message and before receiving the twelfth message, the session management network element may also record that the user plane transmission channel of the first session of the first UE is in an active state, and the user plane transmission channel of the first session of the second UE is in an inactive state.

[0265] In a possible embodiment, the second information includes the SUPI of the second UE and the identifier of the first session, or the second information is allocated by the session management network element and is used to identify the first session of the second UE.

[0266] In a possible embodiment, the twelfth message further includes a second handover indication, which is used to indicate to switch the service data of the first session of the first UE to the first session of the second UE for transmission, or the second handover indication is used to indicate to switch the service data of the first session of the UE associated with the second UE to the first session of the second UE for transmission.

[0267] In a possible embodiment, the session management network element may also receive the SUPI of the first UE, the identifier of the first session, the data network name (DNN), the single network slice selection assistance information (S-NSSAI), the first session establishment request for requesting to establish the first session of the first UE, and the first indication information, where the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs; and determine that the service data corresponding to the first session of the first UE supports transmission between different UEs; and send second indication information, where the second indication information indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0268] Based on this possible embodiment, the session management network element can feedback to the mobile communication device whether the service data of the first session of the first UE supports transmission between different UEs, which is beneficial for the mobile communication device to accurately determine whether it can transmit the service data of the first session between different UEs.

[0269] In a possible embodiment, the specific implementation manner for the session management network element to determine that the service data corresponding to the first session of the first UE supports transmission between different UEs is as follows:

[0270] The session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs based on the local configuration of the DNN; or,

[0271] The session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs based on the subscription data or policy information corresponding to the first session.

[0272] Based on this possible embodiment, the session management network element can accurately determine whether the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0273] In a fourteenth aspect, the present application provides a service data processing method, which is applied to a mobile communication device. The mobile communication device includes a first user equipment (UE) and a second UE. The method includes:

[0274] The mobile communication device selects the first UE according to the directional policy information and establishes the first session of the first UE;

[0275] The directional policy information includes: the first UE is the preferred UE, or a UE priority list (the priority of the first UE is higher than that of the second UE); or,

[0276] The directional policy information includes: the first network is the preferred network, or a network priority list (the priority of the first network is higher than that of the second network); where the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0277] The directional policy information includes: the first RAT is the preferred RAT, or a RAT priority list (the priority of the first RAT is higher than that of the second RAT); where the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE; or,

[0278] The directional policy information includes: the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE). Correspondingly, the directional policy information indicates that the second UE is preferentially selected to transmit the service data of the mobile communication device; or,

[0279] The orientation policy information includes: the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network); wherein, the first network is the network where the first UE camps, and the second network is the network where the second UE camps; or,

[0280] The orientation policy information includes: the second RAT is the preferred RAT, or a RAT priority list (the priority of the second RAT is higher than that of the first RAT); wherein, the first RAT is the RAT supported by the first access network device, the second RAT is the RAT supported by the second access network device, the first access network device corresponds to the first UE, and the second access network device corresponds to the second UE.

[0281] The mobile communication device transmits service data through the first session of the first UE.

[0282] For example, assume that the orientation policy information includes that the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network). If the signal quality between the mobile communication device and the second access network device is poor, such as the signal quality is lower than the set signal threshold, the mobile communication device will not select the second UE. The mobile communication device selects the first UE based on the orientation policy information and the signal quality between the mobile communication device and the first access network device, wherein the signal quality between the mobile communication device and the first access network device is good or higher than the set signal threshold.

[0283] Based on the method described in the fourteenth aspect, it is possible to reasonably select one UE from multiple UEs in the mobile communication device to transmit service data. For example, the capabilities of the mobile communication device are limited and it cannot support multiple UEs to simultaneously transmit service data.

[0284] In a possible embodiment, the mobile communication device may further send a first message to the second network element according to the orientation policy information, and the first message is used to request to switch the service data of the first session of the first UE to the second session of the second UE for transmission.

[0285] Based on this possible embodiment, the mobile communication device can determine based on the orientation policy information that the service data of the first session can be transmitted between different UEs, and there is no need to additionally send indication information to indicate whether the mobile communication device can transmit the service data of the first session between different UEs, which is beneficial to saving the transmission overhead of the indication information.

[0286] In a possible embodiment, the mobile communication device may further send a third message to the second network element according to the orientation policy information, where the third message is used to request to switch the service data of the first session of the first UE to the first session of the second UE for transmission.

[0287] Based on this possible embodiment, the mobile communication device can determine based on the orientation policy information that it is able to transmit the service data of the first session between different UEs, without the need to additionally send indication information indicating whether the mobile communication device can transmit the service data of the first session between different UEs, which is beneficial to saving the transmission overhead of the indication information.

[0288] In a possible embodiment, the mobile communication device may further send a fifth message to the second network element according to the orientation policy information, where the fifth message carries the information of the first session of the first UE, the identifier of the second session of the second UE, and a second session establishment request, and the second session establishment request is used to request to establish the second session of the second UE.

[0289] Based on this possible embodiment, the mobile communication device can determine based on the orientation policy information that it is able to transmit the service data of the first session between different UEs, without the need to additionally send indication information indicating whether the mobile communication device can transmit the service data of the first session between different UEs, which is beneficial to saving the transmission overhead of the indication information.

[0290] In a possible embodiment, the mobile communication device may further send a ninth message to the second network element according to the orientation policy information, where the ninth message carries the information of the first session of the first UE and a second session establishment request, and the second session establishment request is used to request to establish the first session of the second UE.

[0291] Based on this possible embodiment, the mobile communication device can determine based on the orientation policy information that it is able to transmit the service data of the first session between different UEs, without the need to additionally send indication information indicating whether the mobile communication device can transmit the service data of the first session between different UEs, which is beneficial to saving the transmission overhead of the indication information.

[0292] Based on the method described in the fourteenth aspect, when the capabilities of the mobile communication device are limited and it cannot support the simultaneous transmission of service data by two UEs, it is possible to reasonably select one UE to transmit the service data.

[0293] For the beneficial effects of the possible embodiments of the fifth aspect to the fourteenth aspect, reference may be made to the beneficial effects in the first aspect to the fourth aspect, which will not be elaborated here.

[0294] In a fifteenth aspect, the present application provides a communication device. For example, the communication device can be a mobile communication device, a first network element, a second network element, or a session management network element, or a module such as a processor, a chip, or a chip system applied to a mobile communication device, a first network element, a second network element, or a session management network element, and can also be a logical node, a logical module, or software that can implement all or part of the functions of a mobile communication device, a first network element, a second network element, or a session management network element. The communication device includes a module / unit for executing any of the methods in the first aspect to the fourteenth aspect and their possible implementations.

[0295] In a sixteenth aspect, the present application provides a communication device, including a processor, the processor being coupled to a memory, the memory being used to store programs or instructions, and when the programs or instructions are executed by the processor, the device is caused to execute the method described in any one of the first aspect to the fourteenth aspect above.

[0296] In a seventeenth aspect, the present application provides a chip, the chip including a processor and an interface, the processor being coupled to the interface; the interface is used to receive or output signals, and the processor is used to execute code instructions, so that the chip executes the method described in any one of the first aspect to the fourteenth aspect above.

[0297] In an eighteenth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are called, any one of the first aspect to the fourteenth aspect above is executed.

[0298] In a nineteenth aspect, the present application provides a computer program product, the computer program product including: computer program code, and when the computer program code is run, any one of the first aspect to the fourteenth aspect above is executed.

[0299] In a twentieth aspect, the present application provides a communication system, which includes a mobile communication device for executing the method described in the first aspect above, a second network element for executing the second network element described in the second aspect above, a first network element for executing the first network element described in the third aspect above, and a session management network element for executing the session management network element described in the fourth aspect above. Alternatively, the communication system includes a mobile communication device for executing the method described in the fifth aspect above, a second network element for executing the second network element described in the sixth aspect above, a first network element for executing the first network element described in the third aspect above, and a session management network element for executing the session management network element described in the seventh aspect above. Alternatively, the communication system includes a mobile communication device for executing the method described in the eighth aspect above, a second network element for executing the second network element described in the ninth aspect above, a first network element for executing the first network element described in the third aspect above, and a session management network element for executing the session management network element described in the tenth aspect above. Alternatively, the communication system includes a mobile communication device for executing the method described in the eleventh aspect above, a second network element for executing the second network element described in the twelfth aspect above, a first network element for executing the first network element described in the third aspect above, and a session management network element for executing the session management network element described in the thirteenth aspect above. Description of Drawings

[0300] Figure 1 It is a schematic diagram of the switching transmission of service data between different UEs provided by the present application;

[0301] Figure 2 It is a schematic diagram of a 5G communication system provided by the present application;

[0302] Figure 3 It is a schematic diagram of a system architecture provided by the present application;

[0303] Figure 4 It is a schematic flow diagram of a service data processing method provided by the present application;

[0304] Figure 5 It is a schematic diagram of sharing the same IP address for the sessions of a first UE and a second UE provided by the present application;

[0305] Figure 6 It is a schematic flow diagram of a service data processing method provided by the present application;

[0306] Figure 7 It is a schematic flow diagram of a service data processing method provided by the present application;

[0307] Figure 8 It is a schematic flow diagram of a service data processing method provided by the present application;

[0308] Figure 9 It is a schematic flow diagram of a service data processing method provided by the present application;

[0309] Figure 10 A schematic flowchart of a service data processing method provided by this application;

[0310] Figure 11 A schematic flowchart of a service data processing method provided by this application;

[0311] Figure 12 A schematic flowchart of a service data processing method provided by this application;

[0312] Figure 13 A schematic flowchart of a service data processing method provided by this application;

[0313] Figure 14 A schematic structural diagram of a communication device 1400 provided by this application;

[0314] Figure 15 A schematic structural diagram of another communication device 1500 provided by this application. Detailed implementation manners

[0315] The following further describes the specific embodiments of this application in detail with reference to the accompanying drawings.

[0316] The terms "first" and "second" etc. in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0317] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0318] In this application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two, three or more, and "and / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can represent: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one (one)" or its similar expression below refers to any combination of these items, including any combination of single items (one) or plural items (ones). For example, at least one (one) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0319] In order to ensure the continuity of service data when the service data is transmitted and switched between different UEs, an embodiment of this application provides a service data processing method and a communication device.

[0320] To better understand the embodiments of this application, the 5G communication system will be introduced first. As Figure 2 shown, the network functions and entities included in the 5G communication system mainly include: UE, (R)AN, UPF, DN, AUSF, AMF, SMF, NSSF, NEF, NRF, PCF, UDM, and AF. The full names of these network functions and entities are described in detail below. Figure 2 shows the interaction relationships and corresponding interfaces between network functions and entities. For example, UE and AMF can interact through the N1 interface, and the interaction message is called N1 Message. Some interfaces are implemented in the form of service-based interfaces.

[0321] Figure 2 The UE, (R)AN, UPF, and DN in are generally referred to as data plane network functions and entities. The user's data traffic can be transmitted through the PDU session established between the UE and the DN, and the transmission will pass through these two network function entities, namely (R)AN and UPF. The other parts are called control plane network functions and entities, which are mainly responsible for functions such as authentication and authorization, registration management, session management, mobility management, and policy control, so as to realize the reliable and stable transmission of the user layer traffic. The user plane is used for carrying service data, and the control plane is used for carrying signaling messages.

[0322] 1. User Equipment (UE): It can also be referred to as a terminal device. For example, a user equipment can be a handheld terminal, a laptop, a cellular phone, a smart phone, a tablet computer, a handheld device, an AR device, a VR device, a machine type communication terminal, or other devices that can access the network. The UE communicates with the access network device using a certain air interface technology (such as NR or LTE technology). UEs can also communicate with each other using a certain air interface technology (such as NR or LTE technology). In vehicle-to-everything (V2X) communication, the communication terminal installed on a vehicle is a type of UE, and the Road Side Unit (RSU) can also be regarded as a type of UE. A drone equipped with a communication terminal can be considered as a type of UE.

[0323] 2. Radio Access Network (RAN) Equipment: It is mainly responsible for functions such as radio resource management, service quality management, data compression, and encryption on the air interface side. The access network equipment can include various forms of base stations, such as: macro base stations, micro base stations, relay stations, access points, etc. In systems using different radio access technologies, the names of the devices with base station functions may vary. For example, in the 5th generation (5G) system, it is called a gNB.

[0324] 3. User Plane Function (UPF) Network Element: It is responsible for the forwarding and reception of user data in the UE. It can receive user data from the data network and transmit it to the UE through the access network device; the UPF network element can also receive user data from the UE through the access network device and forward it to the data network. The transmission resources and scheduling functions provided for the UE in the UPF network element are managed and controlled by the SMF network element.

[0325] 4. Data Network (DN): It can also be referred to as a Packet Data Network (PDN). It is usually a network outside the operator's network, such as a third-party network. The operator's network can access multiple DNs, and various services can be deployed on the DN, providing services such as data and / or voice for the UE.

[0326] 5. Authentication Server Function (AUSF) Network Element: It supports access authentication for 3GPP and non-3GPP.

[0327] 6. Access and Mobility Management Function (AMF) network element: It belongs to the core network element and is mainly responsible for the signaling processing part. For example, it performs functions such as access control, mobility management, attachment and detachment, and gateway selection. When the AMF network element provides services for a session in the UE, it will provide control plane storage resources for the session to store session identifiers, SMF network element identifiers associated with the session identifiers, etc.

[0328] 7. Session Management Function (SMF) network element: It is responsible for user plane network element selection, user plane network element redirection, Internet Protocol (IP) address allocation, establishment, modification, and release of bearers, and QoS control.

[0329] 8. Network Slice Selection Function (NSSF) network element: It is mainly responsible for network slice selection and determines the network slice instances that the UE is allowed to access based on the UE's slice selection assistance information, subscription information, etc.

[0330] 9. Network Exposure Function (NEF) network element: It mainly supports the secure interaction between the 3GPP network and third-party applications.

[0331] 10. Network Repository Function (NRF) network element: It supports the registration and discovery of network functions.

[0332] 11. Policy Control Function (PCF) network element: It is responsible for policy control decision-making, provides policy rules for control plane functions, and traffic-based charging control functions.

[0333] 12. Unified Data Management (UDM) network element: It is mainly responsible for UE subscription data management, including storage and management of UE identifiers, access authorization for the UE, etc.

[0334] 13. Application Function (AF) network element: It mainly supports interacting with the 3GPP core network to provide services. For example, it affects data routing decisions, policy control functions, or provides some third-party services to the network side.

[0335] To better understand the embodiments of the present application, the system architecture of the embodiments of the present application is introduced below:

[0336] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5th generation (5G) system or New Radio (NR) and future communication systems, etc.

[0337] Please refer to Figure 3 , Figure 3 which is a schematic diagram of a system architecture provided by the embodiments of the present application. As Figure 3 shown, the system architecture includes a mobile communication device, a first access network device, a second access network device, a first network element, a second network element, a session management network element, and a user plane function network element. As Figure 3 shown, the mobile communication device includes a first UE and a second UE. Among them, communication can be carried out between the first UE and the first network element through the first access network device, the first network element can communicate with the session management network element, and the session management network element can communicate with the user plane function network element. Communication can be carried out between the second UE and the second network element through the second access network device, and the second network element can communicate with the session management network element. Optionally, the mobile communication device can be a device with limited capabilities. For example, the mobile communication device has a set of wireless transceiver devices. When communicating between the first UE and the first access network device, the second UE does not communicate with the second access network device, that is to say, the first UE and the second UE do not connect to the access network device at the same time, or the first UE and the second UE are not in the connected state at the same time, or the first UE and the second UE do not access the network at the same time. For example, Figure 3The solid line indicates the communication between the first UE and the first access network device, and the dashed line indicates that the second UE does not communicate with the second access network device. Therefore, when the first UE transmits service data, the second UE does not transmit service data, that is, the first UE and the second UE do not transmit service data simultaneously.

[0338] 1. Mobile communication device: It can also be referred to as a dual steer device. Optionally, the mobile communication device may further include more UEs, which is not limited in the embodiments of the present application. In the embodiments of the present application, the two UEs included in the mobile communication device may be two devices. Or, the two UEs included in the mobile communication device may be two universal subscriber identity modules (USIMs). For example, the first UE may be the first USIM, and the second UE may be the second USIM. Or, the mobile communication device is a terminal device, and the terminal device includes two USIMs. The first UE corresponds to the first USIM, and the second UE corresponds to the second USIM. Correspondingly, in the embodiments of the present application, the mobile communication device may be replaced with a terminal device, the UE may be replaced with a USIM, the first UE may be replaced with the first USIM, and the second UE may be replaced with the second USIM. Or, the mobile communication device is a dual steer device, and the dual steer device includes two USIMs. The first UE corresponds to the first USIM, and the second UE corresponds to the second USIM. Correspondingly, in the embodiments of the present application, the mobile communication device may be replaced with a dual steer device, the UE may be replaced with a USIM, the first UE may be replaced with the first USIM, and the second UE may be replaced with the second USIM.

[0339] 2. First access network device and second access network device: The first UE camps on the first network, and the second UE camps on the second network, that is, the first UE registers on the first network, and the second UE registers on the second network. The first network and the second network may be the same or different. For example, the network is a public land mobile network (PLMN), the first network is the first PLMN, and the second network is the second PLMN. After the first UE and the second UE camp on the network, the first UE and the second UE do not connect to the access network device simultaneously, that is, the first UE and the second UE are not in the connected state simultaneously, or in other words, the first UE and the second UE do not access the network simultaneously. For example, when the first UE is in the connected state, the second UE is in the idle state; when the second UE is in the connected state, the first UE is in the idle state. The first access network device is the access network device corresponding to the first UE, that is, the first UE can connect to the first network through the first access network device. The second access network device is the access network device corresponding to the second UE, that is, the second UE can connect to the second network through the second access network device. Optionally, the first access network device and the second access network device may be the same device or different devices.

[0340] In the embodiments of the present application, the access network device is mainly responsible for functions such as radio resource management, service quality management, data compression, and encryption on the air interface side. The access network device may include various forms of base stations, such as macro base stations, micro base stations, relay stations, access points, etc. For example, the access network device may be a base station, an evolved NodeB (eNodeB), a next generation NodeB (gNB), a next generation base station in a 6th generation (6G) mobile communication system, a base station in a future mobile communication system, etc. All or part of the functions of the access network device in the present application may also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform). The access network device in the present application may also be a logical node, logical module, or software that can implement all or part of the functions of the access network device. In the embodiments of the present application, the form of the access network device is not limited. The device for implementing the functions of the access network device may be the access network device; it may also be a device that can support the access network device to implement this function, such as a chip system. This device may be installed in the access network device or used in combination with the access network device. The types of radio access technologies (RATs) supported by the first access network device and the second access network device may be the same or different. Or rather, the radio access technologies (RATs) provided by the first access network device and the second access network device may be the same or different. For example, the type of radio access technology may be evolved universal terrestrial radio access (E-UTRA), Non-3GPP, 5G NR, 5G NR (satellite), 6G. Among them, 5G NR (satellite) can be further divided into low earth orbit (LEO), medium earth orbit (MEO), and geostationary earth orbit (GEO).

[0341] 3. The first network element and the second network element: Among them, the first network element and the second network element are core network devices. The first network element may provide mobility management, access management, registration management, or session-related services for the first UE. The second network element may provide mobility management, access management, registration management, or session-related services for the second UE. Among them, the first UE may communicate with the first network element through the first access network device. The second UE may communicate with the second network element through the second access network device.

[0342] For example, the first network element may receive a registration request message sent by the first UE and perform relevant processing on the registration of the first UE; the second network element may receive a registration request message sent by the second UE and perform relevant processing on the registration of the second UE. Another example is that the first network element may receive a request message for establishing a session sent by the first UE and perform relevant processing for session establishment; the second network element may receive a request message for establishing a session sent by the second UE and perform relevant processing for session establishment.

[0343] In a 5G system, the first network element and the second network element may be AMF network elements. In a 6G system or a system after 6G, the first network element and the second network element may be referred to as AMF network elements or other names, which are not limited in the embodiments of the present application. Optionally, the first network element and the second network element may be the same network element or different network elements.

[0344] 4. Session management network element: Responsible for user plane network element selection, user plane network element redirection, Internet Protocol (IP) address allocation, establishment, modification, and release of bearers, and QoS control. In a 5G system, the session management network element may be an SMF network element. In a 6G system or a system after 6G, the session management network element may be referred to as an SMF network element or other names, which are not limited in the embodiments of the present application.

[0345] 5. User plane function network element: Responsible for forwarding and receiving user data in the UE. It can receive user data from the data network and transmit it to the UE through the access network device; it can also receive user data from the UE through the access network device and forward it to the data network. In a 5G system, the user plane function network element may be a UPF network element. In a 6G system or a system after 6G, the user plane function network element may be referred to as a UPF network element or other names, which are not limited in the embodiments of the present application.

[0346] The following further introduces the service data processing method and the communication device with reference to the accompanying drawings. It can be understood that in the embodiments of the present application, a mobile communication device, a first access network device, a second access network device, a first network element, a second network element, a session management network element, and a user plane function network element are used as examples of the execution entities of the interaction schematic, but the present application does not limit the execution entities of the interaction schematic. For example, the mobile communication device (or the first access network device or the second access network device or the first network element or the second network element or the session management network element or the user plane function network element) in the method provided by the present application may also be a chip, a chip system, or a processor applied to the mobile communication device (or the first access network device or the second access network device or the first network element or the second network element or the session management network element or the user plane function network element), and may also be a logical node, a logical module, or software that can implement all or part of the mobile communication device (or the first access network device or the second access network device or the first network element or the second network element or the session management network element or the user plane function network element).

[0347] Please refer to Figure 4 , Figure 4 which is a schematic flowchart of a service data processing method provided by an embodiment of the present application. In Figure 4 the described method, when the mobile communication device establishes a second session of a second UE, it triggers the service data to be switched from the first session of the first UE to the second session of the second UE for transmission, and the first session of the first UE and the second session of the second UE share the same IP address. Among them:

[0348] 401. The mobile communication device establishes a first session of the first UE.

[0349] Among them, the first session is associated with a first Internet Protocol (IP) address. That is to say, the first session is used to transmit service data corresponding to the first IP address. The first IP address may be an IP address assigned to the first UE by the session management network element or the user plane function network element during the process of establishing the first session of the first UE. Throughout the embodiments of the present application, the session involved may be a PDU session, or may also be referred to as other session names, which are not limited in the embodiments of the present application.

[0350] In a possible embodiment, the mobile communication device may select the first UE according to the steer policy information and establish the first session of the first UE.

[0351] Optionally, the mobile communication device may select a first UE according to the orientation policy information, and the first UE is used to transmit the service data of the mobile communication device. When the service of the mobile communication device is triggered or there is service data of the mobile communication device to be sent, the mobile communication device determines the session parameters corresponding to the service of the mobile communication device based on the UE route selection policy (URSP) of the first UE, and establishes a first session of the first UE using the session parameters.

[0352] Among them, there are the following six possible implementation methods for the orientation policy information:

[0353] 1) The orientation policy information includes: the first UE is the preferred UE, or the UE priority list (the first UE has a higher priority than the second UE). Correspondingly, the orientation policy information indicates that the first UE is preferentially selected or more inclined to be selected to transmit the service data of the mobile communication device. The first UE being the preferred UE can be replaced by the first UE being the primary UE.

[0354] 2) The orientation policy information includes: the first network is the preferred network, or the network priority list (the first network has a higher priority than the second network); where the first network is the network where the first UE camps, and the second network is the network where the second UE camps. Correspondingly, the orientation policy information indicates that the UE accessing the first network is preferentially selected or more inclined to be selected to transmit the service data of the mobile communication device. The first network being the preferred network can be replaced by the first network being the primary network.

[0355] 3) The orientation policy information includes: the first RAT is the preferred RAT, or the RAT priority list (the first RAT has a higher priority than the second RAT); where the first RAT is the RAT supported by the first access network device, and the second RAT is the RAT supported by the second access network device. Correspondingly, the orientation policy information indicates that the UE accessing the first RAT is preferentially selected or more inclined to be selected to transmit the service data of the mobile communication device. The first RAT being the preferred RAT can be replaced by the first RAT being the primary RAT.

[0356] Optionally, the mobile communication device may select the first UE according to the orientation policy information and the signal quality between the mobile communication device and the first access network device. For example, the first UE is selected only when the signal quality between the mobile communication device and the first access network device is higher than the set signal threshold. If the signal quality between the mobile communication device and the first access network device is lower than the set signal threshold, the first UE is not selected, and then the second UE is selected based on the orientation policy information and the signal quality between the mobile communication device and the second access network device.

[0357] 4) The orientation policy information includes: the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE). Accordingly, the orientation policy information indicates that the second UE is preferably selected to transmit the service data of the mobile communication device. The second UE being the preferred UE can be replaced by the second UE being the primary UE.

[0358] 5) The orientation policy information includes: the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network); wherein, the first network is the network where the first UE camps, and the second network is the network where the second UE camps. Accordingly, the orientation policy information indicates that the UE accessing the second network is preferably selected to transmit the service data of the mobile communication device. The second network being the preferred network can be replaced by the second network being the primary network.

[0359] 6) The orientation policy information includes: the second RAT is the preferred RAT, or a RAT priority list (the priority of the second RAT is higher than that of the first RAT); wherein, the first RAT is the RAT supported by the first access network device, and the second RAT is the RAT supported by the second access network device. Accordingly, the orientation policy information indicates that the UE accessing the second RAT is preferably selected to transmit the service data of the mobile communication device. The second RAT being the preferred RAT can be replaced by the second RAT being the primary RAT.

[0360] For example, assume that the orientation policy information includes that the second UE is the preferred UE, or a UE priority list (the priority of the second UE is higher than that of the first UE), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network), or the second network is the preferred network, or a network priority list (the priority of the second network is higher than that of the first network). If the signal quality between the mobile communication device and the second access network device is poor, such as the signal quality being lower than the set signal threshold, the mobile communication device will not select the second UE. The mobile communication device selects the first UE based on the orientation policy information and the signal quality between the mobile communication device and the first access network device, where the signal quality between the mobile communication device and the first access network device is good or higher than the set signal threshold.

[0361] Based on this possible embodiment, it is possible to reasonably select one UE from multiple UEs in the mobile communication device to transmit service data. For example, the capabilities of the mobile communication device are limited and it cannot support multiple UEs to transmit service data simultaneously.

[0362] Optionally, when the first UE or the second UE is registered, the mobile communication device may receive the directional policy information from the policy control function network element. Optionally, when the first UE or the second UE is registered, the mobile communication device may receive the directional policy information from the first network element or the second network element, and the first network element or the second network element receives the directional policy information from the policy control function network element. Optionally, the first UE is the primary UE in the mobile communication device. When the first UE is registered, the mobile communication device may receive the directional policy information from the first network element, and the first network element receives the directional policy information from the policy control function network element. In the 5G system, the policy control function network element may be a PCF network element. In the 6G system or a system after 6G, the policy control function network element may be referred to as a PCF network element or other names, which is not limited in the embodiments of the present application.

[0363] In a possible embodiment, the specific implementation manner for the mobile communication device to establish the first session of the first UE is as follows: The mobile communication device sends the identifier of the first session of the first UE, the data network name (DNN), the single-network slice selection assistance information (S-NSSAI), the first session establishment request, and the first indication information to the first network element. The first session establishment request is used to request the establishment of the first session of the first UE. For example, the first session establishment request is a PDU session establishment request (PDU session establishment request). The first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs. Optionally, the mobile communication device determines the session parameters corresponding to the service of the mobile communication device based on the URSP of the first UE, such as DNN or S-NSSAI.

[0364] Correspondingly, the first network element may receive these messages. After receiving these messages, the first network element selects a session management network element based on the first indication information, and the session management network element supports the transmission of service data between different UEs. The first network element sends the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the first session establishment request to the session management network element. It can be seen that by sending the first indication information to the first network element, the first network element can select a session management network element that supports the transmission of service data between different UEs based on the first indication information, which is convenient for subsequent processing. For example, relevant descriptions can be found in the descriptions of steps 601 to 602 in the corresponding embodiments below, which will not be elaborated here. Of course, the mobile communication device may also establish the first session of the first UE in other ways, which is not limited in the embodiments of the present application. Figure 6 The descriptions corresponding to steps 601 to 602 in the embodiments below are not repeated here. Of course, the mobile communication device may also establish the first session of the first UE in other ways, which is not limited in the embodiments of the present application.

[0365] 402. The mobile communication device transmits the service data corresponding to the first IP address through the first session of the first UE.

[0366] In the embodiment of the present application, after the mobile communication device establishes the first session of the first UE, it can transmit the service data corresponding to the first IP address through the first session of the first UE. The first session of the first UE is transmitted / bearered through the first access network device.

[0367] 403. The mobile communication device sends a first message to the second network element. The first message carries the information of the first session of the first UE, the identifier of the second session of the second UE, and a second session establishment request. The second session establishment request is used to request the establishment of the second session of the second UE, and the first message is used to request to switch the service data of the first session of the first UE to the second session of the second UE for transmission. Accordingly, the second network element can receive the first message.

[0368] Among them, steps 403 to 405 are the process of establishing the second session of the second UE and the process of switching service data.

[0369] In the embodiment of the present application, the second UE in the mobile communication device can send the first message to the second network element through the second access network device.

[0370] In a possible embodiment, the first message may be a NAS message (NAS Message). Optionally, the second session establishment request (session establishment request) may include the identifier of the second session. For example, the second session establishment request is a PDU session establishment request (PDU session establishment request).

[0371] In a possible embodiment, the triggering condition for the mobile communication device to send the first message to the second network element may be: the signal quality between the mobile communication device and the first access network device deteriorates, or the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or the quality of service (QoS) requirement of the first session of the first UE is not satisfied.

[0372] Optionally, the deterioration of the signal quality between the mobile communication device and the first access network device may be that the signal quality between the mobile communication device and the first access network device has decreased by greater than or equal to the first value.

[0373] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirements of the first session of the first UE are not met, the service data transmission can be timely switched to the second UE to ensure the transmission quality of the service data.

[0374] In another possible embodiment, the trigger condition for the mobile communication device to send the first message to the second network element may be: the signal quality between the mobile communication device and the first access network device deteriorates, or the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or the quality of service QoS requirements of the first session of the first UE are not met; and the signal quality between the mobile communication device and the second access network device is higher than the second threshold.

[0375] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirements of the first session of the first UE are not met, and when the signal quality between the second UE and the second access network device is good, the service data transmission can be timely switched to the second UE to ensure the transmission quality of the service data.

[0376] In a possible embodiment, the mobile communication device may further receive second indication information, which indicates that the service data of the first session is allowed to be transmitted between different UEs, or indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs; the mobile communication device may send the first message according to the second indication information. That is to say, the mobile communication device sends the first message only when the service data of the first session is allowed to be transmitted between different UEs, or when the service data of the mobile communication device is allowed to be transmitted between different UEs. Based on this possible embodiment, it is beneficial for the mobile communication device to accurately determine whether the service data of the first session can be transmitted between different UEs.

[0377] Optionally, the second indication information indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs, that is, it indicates that all the service data of the mobile communication device is allowed to be transmitted between different UEs or indicates that the service data of all sessions of the mobile communication device is allowed to be transmitted between different UEs. The mobile communication device may also receive the second indication information from the policy control network element when the first UE or the second UE is registered. Correspondingly, the policy control network element may send the second indication information to the mobile communication device.

[0378] In a possible embodiment, when the first network element sends the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the first session establishment request to the session management network element, it may also send the first indication information. As described above, the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs. After receiving these messages, if the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs, the session management network element sends the second indication information to the first network element, so that the second network element sends the second indication information to the mobile communication device, and the second indication information indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs. After receiving the second indication information, the mobile communication device may send the first message based on the second indication information.

[0379] That is to say, if the second indication information indicates that the service data of the first session is allowed to be transmitted between different UEs, the mobile communication device may receive the second indication information from the session management network element during the establishment of the first session. For example, the relevant description can also be found in Figure 6 the descriptions under steps 601 to 606 in the corresponding embodiment, which will not be elaborated here.

[0380] In a possible embodiment, the mobile communication device sends the first message to the second network element according to the directional policy information. Based on this possible embodiment, the mobile communication device can determine that the service data of the first session can be transmitted between different UEs based on the directional policy information, and there is no need to additionally send indication information to indicate whether the mobile communication device can transmit the service data of the first session between different UEs, which helps to save the transmission overhead of the indication information.

[0381] For example, the directional policy information includes: a UE priority list (the first UE has a higher priority than the second UE). Since the directional policy information includes the second UE, it means that the mobile communication device is allowed to transmit service data through the second UE, but the priority of the second UE is lower than that of the first UE. Therefore, the mobile communication device can send the first message to switch the service data to the second UE for transmission. Correspondingly, if the directional policy information only includes the first UE and does not include the second UE, the mobile communication device cannot send the first message.

[0382] For example, the directional policy information includes: a network priority list (the first network has a higher priority than the second network). Since the directional policy information includes the second network, it means that the mobile communication device is allowed to transmit service data through the second network, but the priority of the second network is lower than that of the first network. Therefore, the mobile communication device can send the first message to switch the service data to the second UE for transmission. Correspondingly, if the directional policy information only includes the first network and does not include the second network, the mobile communication device cannot send the first message.

[0383] For example, the orientation policy information includes: a RAT priority list (the first RAT has a higher priority than the second RAT). Since the orientation policy information includes the second network, it means that the mobile communication device is allowed to transmit service data through the second RAT, but the priority of the second RAT is lower than that of the first RAT. Therefore, the mobile communication device can send a first message to switch the service data to the second UE for transmission. Correspondingly, if the orientation policy information only includes the first RAT and does not include the second RAT, the mobile communication device cannot send the first message.

[0384] The same applies when the orientation policy information includes a UE priority list (the second UE has a higher priority than the first UE) or the orientation policy information includes a network priority list (the second network has a higher priority than the first network) or the orientation policy information includes a RAT priority list (the second RAT has a higher priority than the first RAT), which will not be elaborated here.

[0385] Furthermore, when the signal quality between the mobile communication device and the second access network device is good or higher than the set signal threshold, the mobile communication device sends the first message.

[0386] Optionally, the first message further includes session parameters corresponding to the second session, such as DNN or S-NSSAI.

[0387] For example, the mobile communication device determines the session parameters corresponding to the second session of the second UE based on the URSP of the second UE. Optionally, when the session parameters corresponding to the second session of the second UE are the same as the session parameters corresponding to the first session of the first UE, the mobile communication device sends the first message to switch the service data to the second session of the second UE for transmission.

[0388] For another example, the mobile communication device generates the session parameters corresponding to the second session based on the session parameters of the first session. Optionally, the session parameters corresponding to the second session are the same as the parameters of the first session, that is, the mobile communication device sets the session parameters corresponding to the second session as the session parameters of the first session, or uses the session parameters of the first session of the first UE as the session parameters corresponding to the second session of the second UE.

[0389] Optionally, the mobile communication device generates the session parameters corresponding to the second session based on the session parameters of the first session according to the second indication information, or sets the session parameters corresponding to the second session as the session parameters of the first session. It should be understood that at this time, the mobile communication device does not need to determine the session parameters corresponding to the second session according to the URSP of the second UE. That is to say, when the service data allows switching between different UEs, the session parameters corresponding to the second session can be directly set as the session parameters of the first session so that the mobile communication device can send the first message.

[0390] Optionally, the mobile communication device generates session parameters corresponding to the second session based on the session parameters of the first session according to the orientation policy information, or sets the session parameters corresponding to the second session as the session parameters of the first session, so that the mobile communication device can send the first message. It should be understood that at this time, the mobile communication device does not determine the session parameters corresponding to the second session according to the URSP of the second UE.

[0391] For example, the orientation policy information includes: a UE priority list (the first UE priority is higher than the second UE). Since the orientation policy information includes the second UE, it means that the mobile communication device is allowed to transmit service data through the second UE, but the second UE priority is lower than the first UE. Therefore, the session parameters corresponding to the second session can be directly set as the session parameters of the first session, so that the mobile communication device can send the first message.

[0392] For example, the orientation policy information includes: a network priority list (the first network priority is higher than the second network). Since the orientation policy information includes the second network, it means that the mobile communication device is allowed to transmit service data through the second network, but the second network priority is lower than the first network. Therefore, the session parameters corresponding to the second session can be directly set as the session parameters of the first session, so that the mobile communication device can send the first message.

[0393] For example, the orientation policy information includes: a RAT priority list (the first RAT priority is higher than the second RAT). Since the orientation policy information includes the second network, it means that the mobile communication device is allowed to transmit service data through the second RAT, but the second RAT priority is lower than the first RAT. Therefore, the session parameters corresponding to the second session can be directly set as the session parameters of the first session, so that the mobile communication device can send the first message.

[0394] 404. The second network element sends a second message to the session management network element based on the first message. The second message carries the SUPI of the first UE, the identifier of the first session, the SUPI of the second UE, the identifier of the second session, and a second session establishment request. Wherein, the second message is used to request to switch the service data of the first session of the first UE to the second session of the second UE for transmission, and the session management network element is the network element that manages the first session of the first UE. Correspondingly, the session management network element can receive the second message.

[0395] In a possible embodiment, the second message may be a PDUSession_CreateSMContextRequest.

[0396] In a possible embodiment, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the DNN corresponding to the first session of the first UE, and the S-NSSAI corresponding to the first session of the first UE. Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0397] In a possible embodiment, the first message further includes the subscription concealed identifier (SUCI) of the first UE, or the subscription permanent identifier (SUPI) of the first UE, or the binding UE indication. Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0398] The following describes several possible implementation manners of the second network element sending a second message to the session management network element based on the first message in different cases:

[0399] Case 1: The information of the first session of the first UE is the identifier of the first session of the first UE.

[0400] 1) The specific implementation manner of the second network element sending a second message to the session management network element based on the first message is as follows: The second network element obtains the SUPI of the first UE and the identifier of the session management network element for managing the first session based on the device identifier information and the identifier of the first session; where the device identifier information is the SUPI of the second UE, or the first message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends the second message to the session management network element. Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE, so as to send the second message to the session management network element.

[0401] The SUPI of the second UE is pre-stored in the second network element. Therefore, after the second network element receives the first message sent by the second UE in the mobile communication device, the second network element can obtain the SUPI of the second UE. The second network element obtains the SUPI of the first UE and the identifier of the session management network element for managing the first session based on the SUPI of the second UE and the identifier of the first session, so as to send the second message to the session management network element.

[0402] Alternatively, the first message further includes the SUCI of the first UE. After receiving the first message sent by the second UE in the mobile communication device, the second network element may obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session based on the SUCI of the first UE and the identifier of the first session, so as to send a second message to the session management network element.

[0403] In a possible embodiment, the specific implementation manner for the second network element to obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session based on the device identifier information and the identifier of the first session is as follows: The second network element sends the device identifier information and the identifier of the first session to the unified data management network element; The second network element receives the SUPI of the first UE and the identifier of the session management network element for managing the first session sent by the unified data management network element. Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0404] In the 5G system, the unified data management network element may be a UDM network element. In the 6G system or a system after 6G, the unified data management network element may be referred to as a UDM network element or other names, which are not limited in the embodiments of this application.

[0405] The unified data management network element stores the association relationship between the SUPI of the first UE and the SUPI of the second UE. For example, during the process of the operator opening accounts for the first UE and the second UE, the unified data management network element stores the association relationship between the SUPI of the first UE and the SUPI of the second UE.

[0406] The unified data management network element also stores the association relationship between the SUPI of the first UE, the identifier of the first session, session parameters (such as DNN and / or S-NSSAI), and the identifier of the session management network element for managing the first session. For example, during the process of establishing the first session for the first UE, the session management network element for managing the first session may send the SUPI of the first UE, the identifier of the first session, session parameters, and the identifier of this session management network element to the unified data management network element. After receiving this information, the unified data management network element may store the association relationship between the SUPI of the first UE, the identifier of the first session, session parameters, and the identifier of this session management network element.

[0407] For example, take the SUPI of the second UE as the device identification information. The second network element may send the SUPI of the second UE and the identification of the first session to the unified data management network element. After receiving the SUPI of the second UE and the identification of the first session, the unified data management network element obtains the SUPI of the first UE associated with the second UE based on the pre-stored association relationship between the SUPI of the first UE and the SUPI of the second UE. Then, the unified data management network element obtains the identification of the session management network element associated with the SUPI of the first UE and the identification of the first session based on the pre-stored association relationship between the SUPI of the first UE, the identification of the first session, the session parameters, and the identification of the session management network element for managing the first session. The unified data management network element returns the SUPI of the first UE and the identification of the session management network element to the second network element.

[0408] Optionally, if the device identification information is the SUPI of the second UE, when the second network element sends the SUPI of the second UE and the identification of the first session to the unified data management network element, it may also send a binding UE indication, which is used to indicate obtaining the SUPI of the UE associated with the second UE. In this way, the unified data management network element obtains the identification of the session management network element for managing the first session of the UE associated with the SUPI of the second UE. Specifically, the unified data management network element determines that the SUPI of the UE associated with the second UE is the SUPI of the first UE according to the pre-stored association relationship between the SUPI of the first UE and the SUPI of the second UE. Furthermore, the unified data management network element determines the session management network element for managing the first session of the first UE.

[0409] Another example, take the SUCI of the first UE as the device identification information. The second network element may send the SUCI of the first UE and the identification of the first session to the unified data management network element. After receiving the SUCI of the first UE and the identification of the first session, the unified data management network element may first convert the SUCI of the first UE into the SUPI of the first UE. Then, the unified data management network element obtains the identification of the session management network element associated with the SUPI of the first UE and the identification of the first session based on the pre-stored association relationship between the SUPI of the first UE, the identification of the first session, the session parameters, and the identification of the session management network element for managing the first session. The unified data management network element returns the SUPI of the first UE and the identification of the session management network element to the second network element.

[0410] In another possible embodiment, the specific implementation of the second network element for obtaining the SUPI of the first UE and the identifier of the session management network element for managing the first session based on the device identifier information and the identifier of the first session is as follows: The second network element sends the device identifier information to the authentication service function network element or the unified data management network element; the second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; the second network element sends the SUPI of the first UE and the identifier of the first session to the unified data management network element; the second network element receives the identifier of the session management network element for managing the first session sent by the unified data management network element. Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE and the identifier of the session management network element for managing the first session of the first UE.

[0411] In the 5G system, the authentication service function network element may be the AUSF network element. In the 6G system or a system after 6G, the authentication service function network element may be referred to as the AUSF network element or other names, which are not limited in the embodiments of this application.

[0412] For example, taking the device identifier information as the SUPI of the second UE as an example. The second network element may send the SUPI of the second UE to the unified data management network element. After receiving the SUPI of the second UE, the unified data management network element obtains the SUPI of the first UE associated with the second UE based on the association relationship between the pre-stored SUPI of the first UE and the SUPI of the second UE, and then returns the SUPI of the first UE to the second network element. After receiving the SUPI of the first UE, the second network element sends the SUPI of the first UE and the identifier of the first session to the unified data management network element. The unified data management network element obtains the identifier of the session management network element associated with the SUPI of the first UE and the identifier of the first session based on the association relationship between the pre-stored SUPI of the first UE, the identifier of the first session, the session parameters, and the identifier of the session management network element for managing the first session. The unified data management network element returns the identifier of the session management network element to the second network element.

[0413] Optionally, if the device identifier information is the SUPI of the second UE, when the second network element sends the SUPI of the second UE to the unified data management network element, it may also send a binding UE indication, which is used to indicate obtaining the SUPI of the UE associated with the second UE.

[0414] For another example, taking the SUCI of the first UE as the device identification information. The second network element may send the SUCI of the first UE to the authentication service function network element or the unified data management network element. After receiving the SUCI of the first UE, the authentication service function network element or the unified data management network element may first convert the SUCI of the first UE into the SUPI of the first UE, and then return the SUPI of the first UE to the second network element. After receiving the SUPI of the first UE, the second network element sends the SUPI of the first UE and the identifier of the first session to the unified data management network element. Based on the association relationship pre-stored between the SUPI of the first UE, the identifier of the first session, the session parameters, and the identifier of the session management network element for managing the first session, the unified data management network element obtains the identifier of the session management network element associated with the SUPI of the first UE and the identifier of the first session. The unified data management network element returns the identifier of this session management network element to the second network element.

[0415] 2) The first message further includes the SUPI of the first UE; the specific implementation manner in which the second network element sends the second message to the session management network element based on the first message is: the second network element obtains the identifier of the session management network element for managing the first session based on the SUPI of the first UE and the identifier of the first session; the second network element sends the second message to this session management network element. Based on this possible embodiment, the second network element can accurately obtain the identifier of the session management network element for managing the first session of the first UE, so as to send the second message to the session management network element.

[0416] For example, the second network element may send the SUPI of the first UE and the identifier of the first session to the unified data management network element. Based on the association relationship pre-stored between the SUPI of the first UE, the identifier of the first session, the session parameters, and the identifier of the session management network element for managing the first session, the unified data management network element obtains the identifier of the session management network element associated with the SUPI of the first UE and the identifier of the first session. The unified data management network element returns the identifier of this session management network element to the second network element.

[0417] Case 2: The information of the first session of the first UE includes the DNN corresponding to the first session of the first UE and / or the S-NSSAI corresponding to the first session of the first UE. For ease of description, in the following text, the DNN corresponding to the first session and / or the S-NSSAI corresponding to the first session of the first UE are referred to as the session parameters of the first session for description.

[0418] 1) The specific implementation manner for the second network element to send a second message to the session management network element based on the first message is as follows: The second network element obtains the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session based on the device identifier information and the session parameters of the first session of the first UE; wherein, the device identifier information is the SUPI of the second UE, or the first message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends the second message to the session management network element. Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session, so as to send the second message to the session management network element.

[0419] In a possible embodiment, the specific implementation manner for the second network element to obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE is as follows: The second network element sends the device identifier information and the session parameters of the first session of the first UE to the unified data management network element; the second network element receives the SUPI of the first UE, the identifier of the session management network element for managing the first session, and the identifier of the first session sent by the unified data management network element. Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identifier of the session management network element for managing the first session of the first UE, and the identifier of the first session.

[0420] For example, taking the device identifier information as the SUPI of the second UE as an example. The second network element may send the SUPI of the second UE and the session parameters of the first session to the unified data management network element. After receiving the SUPI of the second UE and the identifier of the first session, the unified data management network element obtains the SUPI of the first UE associated with the second UE based on the pre-stored association relationship between the SUPI of the first UE and the SUPI of the second UE. Then, the unified data management network element obtains the identifier of the session management network element and the identifier of the first session associated with the SUPI of the first UE and the session parameters of the first session based on the pre-stored association relationship between the SUPI of the first UE, the identifier of the first session, the session parameters, and the identifier of the session management network element for managing the first session. The unified data management network element returns the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session to the second network element.

[0421] Optionally, if the device identifier information is the SUPI of the second UE, when the second network element sends the SUPI of the second UE and the identifier of the first session to the unified data management network element, it may also send an associated UE indication, and the associated UE indication is used to indicate to obtain the SUPI of the UE associated with the second UE.

[0422] For another example, taking the SUCI of the first UE as the device identification information. The second network element may send the SUCI of the first UE and the session parameters of the first session to the unified data management network element. After receiving the SUCI of the first UE and the identification of the first session, the unified data management network element may first convert the SUCI of the first UE into the SUPI of the first UE. Then, based on the pre-stored association relationship between the SUPI of the first UE, the identification of the first session, the session parameters, and the identification of the session management network element for managing the first session, the unified data management network element obtains the identification of the session management network element associated with the SUPI of the first UE and the session parameters of the first session, and the identification of the first session. The unified data management network element returns the SUPI of the first UE, the identification of the session management network element, and the identification of the first session to the second network element.

[0423] In another possible embodiment, the specific implementation manner for the second network element to obtain the SUPI of the first UE, the identification of the session management network element, and the identification of the first session based on the device identification information and the information of the first session of the first UE is as follows: The second network element sends the device identification information to the authentication service function network element or the unified data management network element; the second network element receives the SUPI of the first UE sent by the authentication service function network element or the unified data management network element; the second network element sends the SUPI of the first UE and the session parameters of the first session of the first UE to the unified data management network element; the second network element receives the identification of the session management network element for managing the first session and the identification of the first session sent by the unified data management network element. Based on this possible embodiment, the second network element can accurately obtain the SUPI of the first UE, the identification of the session management network element for managing the first session of the first UE, and the identification of the first session.

[0424] For example, taking the SUPI of the second UE as the device identification information. The second network element may send the SUPI of the second UE to the unified data management network element. After receiving the SUPI of the second UE, the unified data management network element obtains the SUPI of the first UE associated with the second UE based on the pre-stored association relationship between the SUPI of the first UE and the SUPI of the second UE, and then returns the SUPI of the first UE to the second network element. After receiving the SUPI of the first UE, the second network element sends the SUPI of the first UE and the session parameters of the first session to the unified data management network element. The unified data management network element obtains the identification of the session management network element associated with the SUPI of the first UE and the session parameters of the first session, and the identification of the first session based on the pre-stored association relationship between the SUPI of the first UE, the identification of the first session, the session parameters, and the identification of the session management network element for managing the first session. The unified data management network element returns the identification of the session management network element and the identification of the first session to the second network element.

[0425] Optionally, when the device identification information is the SUPI of the second UE, the second network element may also send a binding UE indication when sending the SUPI of the second UE to the unified data management network element. The binding UE indication is used to indicate obtaining the SUPI of the UE associated with the second UE.

[0426] For another example, taking the device identification information as the SUCI of the first UE as an example. The second network element may send the SUCI of the first UE to the authentication service function network element or the unified data management network element. After receiving the SUCI of the first UE, the authentication service function network element or the unified data management network element may first convert the SUCI of the first UE into the SUPI of the first UE, and then return the SUPI of the first UE to the second network element. After receiving the SUPI of the first UE, the second network element sends the SUPI of the first UE and the session parameters of the first session to the unified data management network element. Based on the association relationship between the SUPI of the first UE, the identifier of the first session, the session parameters, and the identifier of the session management network element for managing the first session pre-stored, the unified data management network element obtains the identifier of the session management network element associated with the SUPI of the first UE and the session parameters of the first session and the identifier of the first session. The unified data management network element returns the identifier of the session management network element and the identifier of the first session to the second network element.

[0427] 2) The first message further includes the SUPI of the first UE; the specific implementation manner for the second network element to send a second message to the session management network element based on the first message is: the second network element obtains the identifier of the session management network element for managing the first session and the identifier of the first session based on the SUPI of the first UE and the session parameters of the first session; the second network element sends the second message to the session management network element. Based on this possible embodiment, the second network element can accurately obtain the identifier of the session management network element for managing the first session of the first UE and the identifier of the first session, so as to send the second message to the session management network element.

[0428] For example, the second network element may send the SUPI of the first UE and the session parameters of the first session to the unified data management network element. Based on the association relationship between the SUPI of the first UE, the identifier of the first session, the session parameters, and the identifier of the session management network element for managing the first session pre-stored, the unified data management network element obtains the identifier of the session management network element associated with the SUPI of the first UE and the session parameters of the first session and the identifier of the first session. The unified data management network element returns the identifier of the session management network element and the identifier of the first session to the second network element. After receiving the identifier of the session management network element and the identifier of the first session, the second network element sends the second message to the session management network element.

[0429] In a possible embodiment, the first message and the second message further include a first handover indication, which is used to indicate that the service data of the first session of the first UE is handed over to the second session of the second UE for transmission, or the first handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is handed over to the second session of the second UE for transmission.

[0430] Optionally, the first handover indication may be an indication message, which indicates that the service data of the first session of the first UE is handed over to the second session of the second UE for transmission or the service data of the first session of the UE associated with the second UE is handed over to the second session of the second UE for transmission.

[0431] Alternatively, the first handover indication includes two indication messages. For example, one indication message is a traffic switching indication, which is used to indicate that the service data is handed over to the second session of the second UE for transmission. The other indication message is a binding UE indication, which is used to indicate that the service data is handed over from the UE associated with the second UE. The combination of these two indication messages indicates that the service data of the first session of the UE associated with the second UE is handed over to the second session of the second UE for transmission.

[0432] In another possible embodiment, the messages themselves (i.e., the message names) of the first message and the second message indicate that the service data of the first session of the first UE is handed over to the second session of the second UE for transmission, or indicate that the service data of the first session of the UE associated with the second UE is handed over to the second session of the second UE for transmission.

[0433] 405. In response to the second message, the session management network element sends the first N4 session identifier and the address information of the second access network device to the user plane function network element. The first N4 session identifier is the N4 session identifier associated with the identifier of the first session of the first UE. The first N4 session identifier and the address information of the second access network device are used to indicate that the service data carried by the first IP address corresponding to the first N4 session identifier is sent to the second access network device. The second access network device is used to carry the second session of the second UE. The first IP address is the IP address associated with the identifier of the first session of the first UE. Accordingly, the user plane function network element may receive the first N4 session identifier and the address information of the second access network device.

[0434] That is to say, the first session of the first UE and the second session of the second UE share the same IP address (i.e., the first IP address) and the same N4 session identifier (i.e., the first N4 session identifier). The session management network element does not need to allocate a new N4 session identifier for the second session of the second UE, and can reuse the first N4 session identifier. The IP address used by the service data of the mobile communication device before and after the handover between UEs remains unchanged, so as to maintain service continuity. When establishing the first session of the first UE, the session management network element sends the first N4 session identifier and the first IP address to the user plane function network element, and the user plane function network element already knows the association relationship between the first N4 session identifier and the first IP address. Subsequently, by transmitting the first N4 session identifier and the address information of the second access network device between the session management network element and the user plane function network element, the forwarding rule associated with the first N4 session identifier can be updated to send the service data carried by the first IP address corresponding to the first N4 session identifier to the second access network device. For example, the session management network element sends an N4 Session Modification Request message (the first N4 session identifier, the address information of the second access network device) to the user plane function network element.

[0435] Among them, the address information of the second access network device may be the tunnel endpoint information of the second access network device, such as AN Tunnel Info. After the user plane function network element receives the first N4 session identifier and the address information of the second access network device, the user plane function network element sends the service data carried by the first IP address corresponding to the first N4 session identifier to the second access network device.

[0436] In a possible embodiment, the session management network element may also store the association relationship between the identifier of the first session of the first UE and the first IP address. For example, the session management network element may store the association relationship between the identifier of the first session of the first UE and the first IP address after receiving the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the first session establishment request for requesting to establish the first session of the first UE.

[0437] Optionally, the session management network element may also store the association relationship between the identifier of the second session of the second UE and the first IP address in response to the second message. Optionally, the session management network element may also release the association relationship between the identifier of the first session of the first UE and the first IP address to avoid the same IP address being associated with two different sessions at the same time. For example, reference may be made to Figure 6 Step 610 in the corresponding embodiment.

[0438] Throughout the embodiments of this application, storing the association relationship between the identifier of the session and the first IP address may also be understood as creating the association relationship between the identifier of the session and the first IP address.

[0439] In a possible embodiment, the session management network element stores the association relationship between the identifier of the first session of the first UE and the first N4 session identifier. For example, after receiving the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the first session establishment request for requesting to establish the first session of the first UE, the session management network element stores the association relationship between the identifier of the first session of the first UE and the first N4 session identifier.

[0440] Optionally, the session management network element may also, in response to the second message, store the association relationship between the identifier of the second session of the second UE and the first N4 session identifier. Optionally, the session management network element may also release the association relationship between the identifier of the first session of the first UE and the first N4 session identifier to avoid the same N4 session identifier being associated with two different sessions at the same time. For example, reference may be made to Figure 6 step 610 in the corresponding embodiment.

[0441] Throughout the embodiments of this application, storing the association relationship between the identifier of the session and the first N4 session identifier may also be understood as creating the association relationship between the identifier of the session and the first N4 session identifier.

[0442] In a possible embodiment, the session management network element sends the address information of the user plane function network element to the second access network device, and / or the session management network element triggers the release of the first session. For example, relevant descriptions can be found in Figure 6 the description under step 612 in the corresponding embodiment.

[0443] 406. The mobile communication device transmits the service data corresponding to the first IP address through the second session of the second UE.

[0444] In the embodiments of this application, the session management network element may also send a session establishment accept message to the mobile communication device through the second network element. This session establishment accept message indicates that the second session of the second UE is successfully established or indicates that the establishment of the second session of the second UE is received. For example, this session establishment accept message may be a PDU session establishment accept message. After receiving this session establishment accept message, the mobile communication device may transmit the service data corresponding to the first IP address through the second session of the second UE. The second session of the second UE is transmitted / bearer through the second access network device.

[0445] It can be seen that based on Figure 4In the described method, when establishing a second session for a second UE, the session management network element may receive the identifier of the first session of the first UE, the identifier of the second session of the second UE, and a second session establishment request for establishing the second session of the second UE. In this way, the session management network element can share the first IP address associated with the first session of the first UE for use by the second session of the second UE, that is, the first session of the first UE and the second session of the second UE can share the same IP address. By sharing the same IP address for the first session of the first UE and the second session of the second UE, the IP address used by the service data before and after the handover between UEs in the mobile communication device remains unchanged, and the service continuity can be maintained.

[0446] For example, Figure 5 FIG. is a schematic diagram of sharing the same IP address for the first session of the first UE and the second session of the second UE. The PDU layer is the IP layer. The dashed line may represent the second session of the second UE, and the solid line may represent the first session of the first UE. The first session of the first UE and the second session of the second UE share the same IP address, that is, the first IP address. Before the handover of service data between UEs, the service data corresponding to the first IP address is transmitted through the first session of the first UE (that is, the PDU layer is associated with the transmission channel of the first UE, the solid line exists and the dashed line does not exist). After the handover of service data between UEs, the service data corresponding to the first IP address is transmitted through the second session of the second UE (that is, the PDU layer is associated with the transmission channel of the second UE, the solid line does not exist and the dashed line exists). The first IP address is not used by the two UEs at the same time, that is, during the session granularity handover process, the activation of the second session of the second UE (the dashed line exists) will trigger the deactivation of the first session of the first UE (the solid line does not exist). Before and after the handover of service data between UEs, the connection between the PDU layer and the application layer does not change, that is, the IP address used by the application does not change, and the service continuity is not affected.

[0447] For ease of understanding Figure 4 the content introduced in the corresponding embodiments, the following combines Figure 6 to further introduce the service data processing method provided by the embodiments of the present application. Please refer to Figure 6 , Figure 6 which is a schematic flowchart of another service data processing method provided by the embodiments of the present application.

[0448] Among them:

[0449] 601. The mobile communication device sends the identifier of the first session of the first UE, the DNN, the S-NSSAI, the first session establishment request, and the first indication information to the first network element. The first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs. Accordingly, the first network element can receive the identifier of the first session of the first UE, the DNN, the S-NSSAI, the first session establishment request, and the first indication information.

[0450] Among them, steps 601 to 606 are a specific implementation manner for establishing the first session of the first UE.

[0451] Optionally, the mobile communication device may send a NAS message to the first network element through the first access network device. The NAS message carries the identifier of the first session of the first UE, the DNN, the S-NSSAI, the first session establishment request, and the first indication information. Optionally, the first session establishment request may include the identifier of the first session.

[0452] In the embodiments of the present application, by sending the first indication information to the first network element, the first network element can select a session management network element that supports the transmission of service data between different UEs based on the first indication information, which is convenient for subsequent processing.

[0453] In the embodiments of the present application, the first indication information indicating that the service data of the first session of the first UE may be transmitted between different UEs can also be understood as the first indication information indicating that the service data of the first session of the first UE may be switched between different UEs. Or the first indication information indicates that the type of the first session is a session across UEs, and a session across UEs can be understood as a session that can be transferred or switched between different UEs.

[0454] Optionally, the mobile communication device may also not send the first indication information to the first network element. For example, after the first network element receives the identifier of the first session of the first UE, the DNN, the S-NSSAI, and the first session establishment request sent by the mobile communication device, it may default to select a session management network element that supports the transmission of service data between different UEs for subsequent processes. Or, if the mobile communication device does not send the first indication information to the first network element, the first network element may also select a session management network element to manage the first session based on existing methods. For example, the first network element may select a session management network element to manage the first session based on the DNN or the S-NSSAI.

[0455] 602. The first network element selects a session management network element based on the first indication information, and the session management network element supports the transmission of service data between different UEs.

[0456] In the embodiments of the present application, the session management network element supports the transmission of service data between different UEs, which can also be understood as the session management network element supports the handover of service data between different UEs, or supports the session types across UEs.

[0457] 603. The first network element sends the SUPI of the first UE, the identifier of the first session, DNN, S-NSSAI, the first session establishment request, and the first indication information to the session management network element. Correspondingly, the session management network element can receive the SUPI of the first UE, the identifier of the first session, DNN, S-NSSAI, the first session establishment request, and the first indication information sent by the first network element.

[0458] By sending the first indication information to the session management network element, the session management network element can determine whether the service data corresponding to the first session supports / permits transmission between different UEs, and return the determination result to the mobile communication device, so that the mobile communication device can decide whether to initiate the process of switching the transmission of service data subsequently.

[0459] Optionally, the first network element may not send the first indication information to the session management network element. For example, after the session management network element receives the SUPI of the first UE, the identifier of the first session, DNN, S-NSSAI, and the first session establishment request sent by the first network element, it defaults to determining whether the service data corresponding to the first session supports / permits transmission between different UEs, and returns the determination result to the mobile communication device. Or, if the first network element does not send the first indication information to the session management network element, the session management network element may also not execute step 604 and step 605.

[0460] 604. The session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0461] In the embodiments of the present application, after the session management network element receives the SUPI of the first UE, the identifier of the first session, DNN, S-NSSAI, the first session establishment request, and the first indication information, it determines that the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0462] In the embodiments of the present application, the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs, which can also be understood as the session management network element determines that the service data corresponding to the first session of the first UE supports handover between different UEs. Or, the session management network element determines that the type of the first session of the first UE is a session across UEs, and the session across UEs can be understood as that the session can be transferred or switched between different UEs.

[0463] In a possible embodiment, the specific implementation manner for the session management network element to determine that the service data corresponding to the first session of the first UE supports transmission between different UEs is as follows: The session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs based on the local configuration of the DNN; or, the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs based on the subscription data or policy information corresponding to the first session. For example, the session management network element may obtain the subscription data corresponding to the first session from the unified data management network element. The session management network element may obtain the policy information corresponding to the first session from the policy control function network element.

[0464] Optionally, if the session management network element determines that the service data corresponding to the first session of the first UE does not support transmission between different UEs, the session management network element may send an indication message to the mobile communication device through the first network element, and the indication message indicates that the service data corresponding to the first session of the first UE does not support transmission between different UEs. In this way, the mobile communication device does not initiate step 608 based on this indication message and does not switch the service data on the first session to be transmitted on the second UE. Or, if the session management network element determines that the service data corresponding to the first session of the first UE does not support transmission between different UEs, the session management network element does not send any indication message to the mobile communication device. If the mobile communication device does not receive the second indication message, the mobile communication device does not initiate step 608 and does not switch the service data on the first session to be transmitted on the second UE.

[0465] 605. The session management network element sends a second indication message to the first network element, and the second indication message indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs. Correspondingly, the first network element may receive the second indication message.

[0466] In the embodiment of the present application, that the second indication message indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs may also be understood as that the second indication message indicates that the service data corresponding to the first session of the first UE supports switching between different UEs. Or, the second indication message indicates that the type of the first session is a session across UEs, and a session across UEs may be understood as that this session can be transferred or switched between different UEs.

[0467] Optionally, the session management network element may also send the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the identifier of the session management network element to the unified data management network element, so that the unified data management network element stores the association relationship between the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the identifier of the session management network element.

[0468] Optionally, the session management network element may also allocate a first N4 session identifier for the first session, and the N4 session identifier is used to identify the N4 session between the session management network element and the user plane function network element. The session management network element may send the first N4 session identifier and the address information of the first access network device to the user plane function network element, for instructing to send the service data carried by the first IP address corresponding to the first N4 session identifier to the first access network device. The first IP address is the IP address allocated by the session management network element or the user plane function network element for the first session.

[0469] Wherein, the address information of the first access network device may be the tunnel endpoint information of the first access network device.

[0470] Optionally, the session management network element may also send the address information of the user plane function network element to the first access network device, so that the first access network device can send the uplink service data of the first session to the user plane function network element. Wherein, the address information of the user plane function network element may be the tunnel endpoint information of the user plane function network element.

[0471] Optionally, the session management network element may also store the association relationship between the SUPI of the first UE, the identifier of the first session, the DNN, and the S-NSSAI, and store the association relationship between the identifier of the first session and the first IP address, and store the association relationship between the identifier of the first session and the first N4 session identifier, so as to facilitate subsequent management of the first session.

[0472] Optionally, the session management network element may also configure the radio resource between the first access network device and the first UE for the first session.

[0473] Optionally, the session management network element may send a session establishment accept message to the first network element, and the session establishment accept message carries the first IP address and the second indication information, and the session establishment accept message indicates that the first session of the first UE is successfully established. Correspondingly, the first network element may receive the session establishment accept message. For example, the session accept message may be a PDU session establishment accept message.

[0474] Alternatively, the mobile communication device may also establish the first session of the first UE in other ways, which is not limited in the embodiments of the present application.

[0475] 606. The first network element sends the second indication information to the mobile communication device. Correspondingly, the mobile communication device may receive the second indication information.

[0476] In the embodiments of the present application, after receiving the second indication information, the first network element sends the second indication information to the mobile communication device.

[0477] Optionally, the first network element may receive a session establishment acceptance message, which carries a first IP address and second indication information, and the session establishment acceptance message indicates that the first session establishment of the first UE is successful. The first network element sends the session establishment acceptance message to the mobile communication device. Correspondingly, the mobile communication device receives the session establishment acceptance message.

[0478] Alternatively, the session management network element may also use other messages to send the second indication information to the mobile communication device through the first network element, which is not limited in the embodiments of the present application.

[0479] In another possible embodiment, the mobile communication device may also receive the second indication information from the network side when the first UE or the second UE is registered, and the second indication information indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs, that is, it indicates that all the service data of the mobile communication device is allowed to be transmitted between different UEs or indicates that the service data of all sessions of the mobile communication device is allowed to be transmitted between different UEs.

[0480] 607. The mobile communication device transmits the service data corresponding to the first IP address through the first session of the first UE.

[0481] For the description of step 607, reference may be made to the description under step 402, which will not be elaborated here.

[0482] 608. The mobile communication device sends a first message to the second network element according to the second indication information. The first message carries information about the first session of the first UE, an identifier of the second session of the second UE, and a second session establishment request. The second session establishment request is used to request the establishment of the second session of the second UE, and the first message is used to request to switch the service data of the first session of the first UE to the second session of the second UE for transmission. Correspondingly, the second network element may receive the first message.

[0483] In the embodiments of the present application, after the mobile communication device receives the second indication information, it sends the first message to the second network element only when it is determined based on the second indication information that the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0484] For the trigger condition for the mobile communication device to send the first message to the second network element and other descriptions related to step 608, reference may be made to Figure 4 the description under 403 in the corresponding embodiment, which will not be elaborated here.

[0485] Among them, steps 608 to 611 are the processes of establishing the second session of the second UE and switching the service data.

[0486] 609. The second network element sends a second message to the session management network element based on the first message, where the second message carries the SUPI of the first UE, the identifier of the first session, the SUPI of the second UE, the identifier of the second session, and the second session establishment request. The second message is used to request that the service data of the first session of the first UE be switched to the second session of the second UE for transmission, and the session management network element is a network element that manages the first session of the first UE. Accordingly, the session management network element may receive the second message.

[0487] The specific implementation of step 609 can be found in Figure 4 The description of step 404 in the corresponding embodiment is not repeated here.

[0488] 610. In response to the second message, the session management network element stores the association between the identifier of the second session of the second UE, the first IP address, and the first N4 session identifier.

[0489] That is, the second session of the second UE shares the same IP address and the same N4 session identifier with the first session of the first UE. The session management network element can store the association relationship between the identifier of the second session of the second UE, the first IP address and the first N4 session identifier, so as to manage the second session later.

[0490] Optionally, the session management network element may also disassociate the first session identifier of the first UE, the first IP address and the first N4 session identifier, to avoid the same IP address being associated with two different sessions at the same time, and to avoid the same N4 session identifier being associated with two different sessions at the same time.

[0491] 611. In response to the second message, the session management network element sends the first N4 session identifier and the address information of the second access network device to the user plane function network element. The first N4 session identifier and the address information of the second access network device are used to indicate that the service data carried by the first IP address corresponding to the first N4 session identifier is sent to the second access network device, and the second access network device is used to carry the second session of the second UE. Accordingly, the user plane function network element can receive the first N4 session identifier and the address information of the second access network device.

[0492] The specific implementation of step 611 can refer to the description under step 405, which is not repeated here.

[0493] 612. The session management network element sends address information of the user plane function network element to the second access network device, and / or the session management network element triggers the release of the first session.

[0494] In the embodiment of the present application, after the session management network element sends the address information of the user plane function network element to the second access network device, the second access network device can send the uplink service data of the second session to the user plane function network element. Among them, the address information of the user plane function network element may be the tunnel endpoint information of the user plane function network element.

[0495] In the embodiment of the present application, the session management network element triggering the release of the first session means that the session management network element triggers the release of the user plane transmission of the first session, that is, releases the N3 connection configured for the first session between the first access network device and the user plane function network element, and releases the radio interface resources configured for the first session between the first access network device and the first UE. Since the second session of the second UE shares the same N4 session identifier with the first session of the first UE, the N4 session corresponding to the first N4 session identifier is not released.

[0496] Throughout the embodiment of the present application, releasing the first session can also be understood as deactivating the first session.

[0497] 613. The mobile communication device transmits the service data corresponding to the first IP address through the second session of the second UE.

[0498] Step 613 can refer to the description under step 406 and will not be elaborated here.

[0499] It can be seen that based on Figure 6 the method described above, when establishing the second session of the second UE, the session management network element can receive the identifier of the first session of the first UE, the identifier of the second session of the second UE, and the second session establishment request for establishing the second session of the second UE. In this way, the session management network element can share the first IP address associated with the first session of the first UE for use by the second session of the second UE, that is, the first session of the first UE and the second session of the second UE can share the same IP address. By enabling the first session of the first UE and the second session of the second UE to share the same IP address, the IP address used by the service data before and after the handover between UEs in the mobile communication device remains unchanged, and the service continuity can be maintained.

[0500] Please refer to Figure 7 , Figure 7 which is a schematic flowchart of another service data processing method provided by the embodiment of the present application. In Figure 7 the method described above, the first UE and the second UE share the same session, that is, the first session. When the mobile communication device establishes the first session of the second UE, it triggers the handover of the service data from the first session of the first UE to the first session of the second UE for transmission, and the first session of the first UE and the first session of the second UE share the same IP address. Among them:

[0501] 701. The mobile communication device establishes a first session for a first UE. The first session is associated with a first IP address.

[0502] 702. The mobile communication device transmits service data corresponding to the first IP address through the first session of the first UE.

[0503] For the descriptions of steps 701 to 702, reference can be made to Figure 4 the descriptions under steps 401 to 402 in the corresponding embodiments, which will not be elaborated here.

[0504] 703. The mobile communication device sends a third message to a second network element. The third message carries information about the first session of the first UE and a second session establishment request. The second session establishment request is used to request the establishment of a first session for a second UE. The third message is used to request to switch the service data of the first session of the first UE to be transmitted through the first session of the second UE. Correspondingly, the second network element can receive the third message.

[0505] That is to say, the first UE and the second UE share the same session, that is, the first session. Steps 703 to 705 are the processes of establishing the first session of the second UE and the process of switching service data.

[0506] In the embodiment of the present application, the second UE in the mobile communication device can send the third message to the second network element through a second access network device.

[0507] In a possible embodiment, the third message can be a NAS message (NAS Message). Optionally, the second session establishment request (session establishment request) may include an identifier of the first session. For example, the second session establishment request is a PDU session establishment request (PDU session establishment request).

[0508] In a possible embodiment, the triggering condition for the mobile communication device to send the third message to the second network element may be: the signal quality between the mobile communication device and the first access network device deteriorates, or the signal quality between the mobile communication device and the first access network device is lower than a first threshold, or the QoS requirement of the first session of the first UE is not met.

[0509] Optionally, the deterioration of the signal quality between the mobile communication device and the first access network device may be that the signal quality between the mobile communication device and the first access network device has decreased by greater than or equal to a first value.

[0510] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirements of the first session of the first UE are not met, the service data can be timely switched to the second UE for transmission to ensure the transmission quality of the service data.

[0511] In another possible embodiment, the triggering condition for the mobile communication device to send the third message to the second network element may be: the signal quality between the mobile communication device and the first access network device deteriorates, or the signal quality between the mobile communication device and the first access network device is lower than the first threshold, or the quality of service QoS requirements of the first session of the first UE are not met; and the signal quality between the mobile communication device and the second access network device is higher than the second threshold.

[0512] Based on this possible embodiment, when the signal quality between the first UE and the first access network device deteriorates or is poor, or when the QoS requirements of the first session of the first UE are not met, and when the signal quality between the second UE and the second access network device is good, the service data can be timely switched to the second UE for transmission to ensure the transmission quality of the service data.

[0513] In a possible embodiment, the mobile communication device may further receive second indication information, which indicates that the service data of the first session is allowed to be transmitted between different UEs, or indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs; the mobile communication device may send the third message according to the second indication information. That is, the mobile communication device sends the third message only when the service data of the first session is allowed to be transmitted between different UEs, or when the service data of the mobile communication device is allowed to be transmitted between different UEs. Based on this possible embodiment, it is beneficial for the mobile communication device to accurately determine whether the service data of the first session can be transmitted between different UEs.

[0514] Optionally, if the second indication information indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs, that is, it indicates that all the service data of the mobile communication device is allowed to be transmitted between different UEs or indicates that the service data of all sessions of the mobile communication device is allowed to be transmitted between different UEs, the mobile communication device may also receive the second indication information from the policy control network element when the first UE or the second UE is registered. Correspondingly, the policy control network element may send the second indication information to the mobile communication device.

[0515] In a possible embodiment, when the first network element sends the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the first session establishment request to the session management network element, it may also send first indication information. After receiving this information, if the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs, the session management network element sends second indication information to the first network element, so that the second network element sends the second indication information to the mobile communication device, and the second indication information indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs. After receiving the second indication information, the mobile communication device may send a third message based on the second indication information.

[0516] That is to say, if the second indication information indicates that the service data of the first session is allowed to be transmitted between different UEs, the mobile communication device may receive the second indication information from the session management network element during the establishment of the first session. For example, the relevant description can also be referred to Figure 8 the description under steps 801 to 806 in the corresponding embodiment, which will not be elaborated here.

[0517] In a possible embodiment, the mobile communication device sends a third message to the second network element according to the orientation policy information. Further, when the signal quality between the mobile communication device and the second access network device is good or higher than the set signal threshold, the mobile communication device sends the third message. The implementation principle of the mobile communication device sending a third message to the second network element according to the orientation policy information can be referred to the description under step 403 above, which will not be elaborated here.

[0518] Optionally, the third message further includes session parameters corresponding to the first session of the second UE, such as DNN or S-NSSAI.

[0519] For example, the mobile communication device determines the session parameters corresponding to the first session of the second UE based on the URSP of the second UE. Optionally, when the session parameters corresponding to the first session of the second UE are the same as the session parameters corresponding to the first session of the first UE, the mobile communication device sends the third message to switch the service data to the first session of the second UE for transmission.

[0520] For another example, the mobile communication device generates the session parameters corresponding to the first session of the second UE based on the session parameters of the first session of the first UE. Optionally, the session parameters corresponding to the first session of the second UE are the same as the session parameters of the first session of the first UE, that is, the mobile communication device sets the session parameters corresponding to the first session of the second UE as the session parameters of the first session of the first UE, or uses the session parameters of the first session of the first UE as the session parameters corresponding to the first session of the second UE.

[0521] Optionally, the mobile communication device generates session parameters corresponding to the first session of the second UE based on the session parameters of the first session of the first UE according to the second indication information, or sets the session parameters corresponding to the first session of the second UE as the session parameters of the first session of the first UE. It should be understood that at this time, the mobile communication device does not determine the session parameters corresponding to the first session of the second UE according to the URSP of the second UE. That is to say, when the service data allows switching between different UEs, the session parameters corresponding to the first session of the second UE can be directly set as the session parameters of the first session of the first UE, so that the mobile communication device can send the third message.

[0522] Optionally, the mobile communication device generates session parameters corresponding to the first session of the second UE based on the session parameters of the first session of the first UE according to the directional policy information, or sets the session parameters corresponding to the first session of the second UE as the session parameters of the first session of the first UE, so that the mobile communication device can send the third message. It should be understood that at this time, the mobile communication device does not determine the session parameters corresponding to the first session of the second UE according to the URSP of the second UE.

[0523] For example, the directional policy information includes: a UE priority list (the first UE has a higher priority than the second UE). Since the directional policy information includes the second UE, it means that the mobile communication device is allowed to transmit service data through the second UE, but the priority of the second UE is lower than that of the first UE. Therefore, the session parameters corresponding to the first session of the second UE can be directly set as the session parameters of the first session of the first UE, so that the mobile communication device can send the third message.

[0524] For example, the directional policy information includes: a network priority list (the first network has a higher priority than the second network). Since the directional policy information includes the second network, it means that the mobile communication device is allowed to transmit service data through the second network, but the priority of the second network is lower than that of the first network. Therefore, the session parameters corresponding to the first session of the second UE can be directly set as the session parameters of the first session of the first UE, so that the mobile communication device can send the third message.

[0525] For example, the directional policy information includes: a RAT priority list (the first RAT has a higher priority than the second RAT). Since the directional policy information includes the second network, it means that the mobile communication device is allowed to transmit service data through the second RAT, but the priority of the second RAT is lower than that of the first RAT. Therefore, the session parameters corresponding to the first session of the second UE can be directly set as the session parameters of the first session of the first UE, so that the mobile communication device can send the third message.

[0526] 704. The second network element sends a fourth message to the session management network element based on the third message. The fourth message carries the SUPI of the first UE, the identifier of the first session, the SUPI of the second UE, and a second session establishment request. The fourth message is used to request to switch the service data of the first session of the first UE to the second UE for transmission. The session management network element is the network element that manages the first session of the first UE. Accordingly, the session management network element may receive the fourth message.

[0527] In a possible embodiment, the fourth message may be a PDUSession_CreateSMContextRequest.

[0528] In a possible embodiment, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the DNN corresponding to the first session of the first UE, and the S-NSSAI corresponding to the first session of the first UE. Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0529] In a possible embodiment, the third message further includes the SUCI of the first UE, or the SUPI of the first UE, or a binding UE indication. Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0530] The following describes several possible implementation manners in which the second network element sends a fourth message to the session management network element based on the third message in different cases:

[0531] Case 1: The information of the first session of the first UE is the identifier of the first session of the first UE.

[0532] 1) The specific implementation manner in which the second network element sends a fourth message to the session management network element based on the third message is as follows: The second network element obtains the SUPI of the first UE and the identifier of the session management network element for managing the first session based on the device identifier information and the identifier of the first session; where the device identifier information is the SUPI of the second UE, or the third message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends the fourth message to the session management network element.

[0533] Among them, for the beneficial effects of this specific implementation manner and the specific implementation manner in which the second network element obtains the SUPI of the first UE and the identifier of the session management network element based on the device identifier information and the identifier of the first session, reference may be made to Figure 4 the description under step 404 in the corresponding embodiment, which will not be elaborated here.

[0534] 2) The third message further includes the SUPI of the first UE; the specific implementation of the second network element sending a fourth message to the session management network element based on the third message is as follows: The second network element obtains the identifier of the session management network element for managing the first session based on the SUPI of the first UE and the identifier of the first session; the second network element sends the fourth message to the session management network element.

[0535] For the beneficial effects of this specific implementation and the specific implementation of the second network element obtaining the identifier of the session management network element based on the SUPI of the first UE and the identifier of the first session, reference can be made to Figure 4 the description under step 404 in the corresponding embodiment, which will not be elaborated here.

[0536] Case 2: The information of the first session of the first UE includes the DNN corresponding to the first session of the first UE and / or the S-NSSAI corresponding to the first session of the first UE. For ease of description, hereinafter, the DNN corresponding to the first session and / or the S-NSSAI corresponding to the first session of the first UE will be referred to as the session parameters of the first session for description.

[0537] 1) The specific implementation of the second network element sending a fourth message to the session management network element based on the third message is as follows: The second network element obtains the SUPI of the first UE, the identifier of the session management network element for managing the first session, and the identifier of the first session based on the device identifier information and the session parameters of the first session of the first UE; wherein, the device identifier information is the SUPI of the second UE, or the third message further includes the SUCI of the first UE, and the device identifier information is the SUCI of the first UE; the second network element sends the fourth message to the session management network element.

[0538] For the beneficial effects of this specific implementation and the specific implementation of the second network element obtaining the SUPI of the first UE, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first UE, reference can be made to Figure 4 the description under step 404 in the corresponding embodiment, which will not be elaborated here.

[0539] 2) The third message further includes the SUPI of the first UE; the specific implementation of the second network element sending a fourth message to the session management network element based on the third message is as follows: The second network element obtains the identifier of the session management network element for managing the first session and the identifier of the first session based on the SUPI of the first UE and the session parameters of the first session; the second network element sends the fourth message to the session management network element.

[0540] For the beneficial effects of this specific implementation and the specific implementation of the second network element obtaining the identifier of the session management network element and the identifier of the first session based on the SUPI of the first UE and the identifier of the first session, reference can be made to Figure 4 the description under step 404 in the corresponding embodiment, which will not be elaborated here.

[0541] In a possible embodiment, the third message and the fourth message further include a second handover indication, which is used to indicate that the service data of the first session of the first UE is switched to the first session of the second UE for transmission, or the second handover indication is used to indicate that the service data of the first session of the UE associated with the second UE is switched to the first session of the second UE for transmission.

[0542] Optionally, the second handover indication may be an indication message, which indicates that the service data of the first session of the first UE is switched to the first session of the second UE for transmission or the service data of the first session of the UE associated with the second UE is switched to the first session of the second UE for transmission.

[0543] Alternatively, the second handover indication includes two indication messages. For example, one indication message is a traffic switching indication, which is used to indicate that the service data is switched to the first session of the second UE for transmission. The other indication message is a binding UE indication, which is used to indicate the handover of the service data from the UE associated with the second UE. The combination of these two indication messages indicates that the service data of the first session of the UE associated with the second UE is switched to the first session of the second UE for transmission.

[0544] In another possible embodiment, the message itself (i.e., the message name) of the third message and the fourth message indicates that the service data of the first session of the first UE is switched to the first session of the second UE for transmission, or indicates that the service data of the first session of the UE associated with the second UE is switched to the first session of the second UE for transmission.

[0545] 705. In response to the fourth message, the session management network element sends the first N4 session identifier and the address information of the second access network device to the user plane function network element. The first N4 session identifier is the N4 session identifier associated with the identifier of the first session of the first UE. The first N4 session identifier and the address information of the second access network device are used to indicate that the service data carried by the first IP address corresponding to the first N4 session identifier is sent to the second access network device, and the second access network device is used to carry the first session of the second UE. The first IP address is the IP address associated with the identifier of the first session of the first UE. Accordingly, the user plane function network element may receive the first N4 session identifier and the address information of the second access network device.

[0546] That is to say, the first session of the first UE and the first session of the second UE share the same IP address (i.e., the first IP address) and the same N4 session identifier (i.e., the first N4 session identifier). The session management network element does not need to allocate a new N4 session identifier for the second session of the second UE, and can reuse the first N4 session identifier. The IP address used by the service data before and after the handover between UEs remains unchanged, which can maintain service continuity. For example, the session management network element sends an N4 Session Modification Request message (the first N4 session identifier, the address information of the second access network device) to the user plane function network element.

[0547] Among them, the address information of the second access network device may be the tunnel endpoint information of the second access network device, such as AN Tunnel Info. After the user plane function network element receives the first N4 session identifier and the address information of the second access network device, the user plane function network element sends the service data carried by the first IP address corresponding to the first N4 session identifier to the second access network device.

[0548] In a possible embodiment, the session management network element may also store the association relationship between the SUPI of the first UE, the identifier of the first session of the first UE, the first IP address, and the first N4 session identifier. Optionally, in response to the fourth message, the session management network element may also store the association relationship between the identifier of the first session and the SUPI of the second UE. Optionally, the session management network element may also release the association relationship between the SUPI of the first UE and the identifier of the first session of the first UE, to avoid the same IP address being associated with two different UEs at the same time, and to avoid the same N4 session identifier being associated with two different UEs at the same time. For example, for relevant descriptions, reference can be made to Figure 8 the description under step 810 in the corresponding embodiment.

[0549] In a possible embodiment, the session management network element sends the address information of the user plane function network element to the second access network device, and / or, the session management network element triggers the release of the first session of the first UE. For example, for relevant descriptions, reference can be made to Figure 8 the description under step 812 in the corresponding embodiment.

[0550] 706. The mobile communication device transmits the service data corresponding to the first IP address through the first session of the second UE.

[0551] In an embodiment of the present application, the session management network element may also send a session acceptance message to the mobile communication device through a second network element, and the session acceptance message indicates that the first session of the second UE is successfully established. After receiving the session acceptance message, the mobile communication device may transmit service data corresponding to the first IP address through the first session of the second UE. The first session of the second UE is transmitted / bearered through a second access network device.

[0552] It can be seen that based on Figure 7 the method described above, when establishing the first session of the second UE, the session management network element may receive the identifier of the first session of the first UE, the SUPI of the second UE, and a second session establishment request for establishing the first session of the second UE. In this way, the session management network element can share the first IP address associated with the first session of the first UE for use by the first session of the second UE, that is, the first session of the first UE and the first session of the second UE can share the same IP address. By enabling the first session of the first UE and the first session of the second UE to share the same IP address, the IP address used by the service data before and after the handover between UEs in the mobile communication device remains unchanged, and service continuity can be maintained.

[0553] For ease of understanding Figure 7 the content introduced in the corresponding embodiment, the following further introduces the service data processing method provided by the embodiment of the present application in conjunction with Figure 8 Please refer to Figure 8 , Figure 8 which is a schematic flowchart of another service data processing method provided by the embodiment of the present application.

[0554] Among them:

[0555] 801. The mobile communication device sends the identifier of the first session of the first UE, the DNN, the S-NSSAI, the first session establishment request, and the first indication information to the first network element. Among them, the first session establishment request is used to request the establishment of the first session of the first UE, and the first indication information indicates that the service data of the first session of the first UE may be transmitted between different UEs. Correspondingly, the first network element may receive the identifier of the first session of the first UE, the DNN, the S-NSSAI, the first session establishment request, and the first indication information.

[0556] 802. The first network element selects a session management network element based on the first indication information, and the session management network element supports the transmission of service data between different UEs.

[0557] 803. The first network element sends the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, the first session establishment request, and the first indication information to the session management network element. Correspondingly, the session management network element can receive the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, the first session establishment request, and the first indication information sent by the first network element.

[0558] 804. The session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs.

[0559] 805. The session management network element sends the second indication information to the first network element, and the second indication information indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs. Correspondingly, the first network element can receive the second indication information.

[0560] 806. The first network element sends the second indication information to the mobile communication device. Correspondingly, the mobile communication device can receive the second indication information.

[0561] 807. The mobile communication device transmits the service data corresponding to the first IP address through the first session of the first UE.

[0562] Among them, for the specific implementation manners of steps 801 to 807, reference can be made to Figure 6 the descriptions of steps 601 to 607 in the corresponding embodiments, which will not be elaborated here.

[0563] 808. The mobile communication device sends a third message to the second network element according to the second indication information. The third message carries the information of the first session of the first UE and the second session establishment request. The second session establishment request is used to request the establishment of the first session of the second UE, and the third message is used to request to switch the service data of the first session of the first UE to the first session of the second UE for transmission. Correspondingly, the second network element can receive the third message.

[0564] In the embodiments of this application, after the mobile communication device receives the second indication information, when it is determined based on the second indication information that the service data corresponding to the first session of the first UE supports transmission between different UEs, the mobile communication device sends the third message to the second network element.

[0565] For the triggering condition for the mobile communication device to send the third message to the second network element and other descriptions related to step 808, reference can be made to Figure 7 the description of 703 in the corresponding embodiments, which will not be elaborated here.

[0566] Among them, steps 808 to 811 are the processes for the mobile communication device to establish the first session of the second UE and switch the service data.

[0567] 809. The second network element sends a fourth message to the session management network element based on the third message, where the fourth message carries the SUPI of the first UE, the identifier of the first session, the SUPI of the second UE, and the second session establishment request. The fourth message is used to request that the service data of the first session of the first UE be switched to the first session of the second UE for transmission, and the session management network element is a network element that manages the first session of the first UE. Accordingly, the session management network element may receive the fourth message.

[0568] The specific implementation of step 809 can be found in Figure 7 The description under 704 in the corresponding embodiment is not repeated here.

[0569] 810. In response to the fourth message, the session management network element stores an association between the identifier of the first session and the SUPI of the second UE.

[0570] That is, the first session of the second UE shares the same IP address and the same N4 session identifier with the first session of the first UE. The session management network element may store the association between the identifier of the first session and the SUPI of the second UE to facilitate subsequent management of the first session.

[0571] Optionally, the session management network element may also disassociate the SUPI of the first UE with the identifier of the first session to avoid the same IP address being associated with two different UEs at the same time, and to avoid the same N4 session identifier being associated with two different UEs at the same time.

[0572] 811. In response to the fourth message, the session management network element sends the first N4 session identifier and the address information of the second access network device to the user plane function network element. The first N4 session identifier is an N4 session identifier associated with the identifier of the first session of the first UE. The first N4 session identifier and the address information of the second access network device are used to indicate that the service data carried by the first IP address corresponding to the first N4 session identifier is sent to the second access network device. The second access network device is used to carry the first session of the second UE. The first IP address is an IP address associated with the identifier of the first session of the first UE. Accordingly, the user plane function network element can receive the first N4 session identifier and the address information of the second access network device.

[0573] The specific implementation of step 811 can refer to the description under step 705, which is not repeated here.

[0574] 812. The session management network element sends address information of the user plane function network element to the second access network device, and / or the session management network element triggers the release of the first session of the first UE.

[0575] In the embodiments of the present application, after the session management network element sends the address information of the user plane function network element to the second access network device, the second access network device can send the uplink service data of the first session to the user plane function network element. The address information of the user plane function network element may be the tunnel endpoint information of the user plane function network element.

[0576] In the embodiments of the present application, the session management network element triggers the release of the first session of the first UE, which means that the session management network element triggers the release of the user plane transmission of the first session, that is, releases the N3 connection configured for the first session between the first access network device and the user plane function network element, and releases the radio interface resources configured for the first session between the first access network device and the first UE. Since the first session of the second UE shares the same N4 session identifier as the first session of the first UE, the N4 session corresponding to the first N4 session identifier is not released.

[0577] 813. The mobile communication device transmits the service data corresponding to the first IP address through the first session of the second UE.

[0578] In the embodiments of the present application, the session management network element may also send a session acceptance message to the mobile communication device through the second network element, and the session acceptance message indicates that the establishment of the first session of the second UE is successful. After receiving the session acceptance message, the mobile communication device can transmit the service data corresponding to the first IP address through the first session of the second UE.

[0579] It can be seen that based on Figure 8 the method described above, when establishing the first session of the second UE, the session management network element can receive the identifier of the first session of the first UE, the SUPI of the second UE, and the second session establishment request for establishing the first session of the second UE. In this way, the session management network element can share the first IP address associated with the first session of the first UE for the first session of the second UE to use, that is, the first session of the first UE and the first session of the second UE can share the same IP address. By making the first session of the first UE and the first session of the second UE share the same IP address, the IP address used by the service data before and after the UE inter-switching in the mobile communication device remains unchanged, and the service continuity can be maintained.

[0580] Please refer to Figure 9 , Figure 9 which is a schematic flowchart of a service data processing method provided by the embodiments of the present application. In Figure 9In the described method, the mobile communication device pre - establishes a first session of a first UE and a second session of a second UE, and establishes an association relationship between the first session and the second session. The user - plane transmission of the first session is activated, and the user - plane transmission of the second session is not activated. Subsequently, when the mobile communication device requests to activate the user - plane transmission of the second session, it triggers the switching of service data from the first session of the first UE to the second session of the second UE for transmission.

[0581] And the first session of the first UE and the second session of the second UE share the same IP address. Wherein:

[0582] 901. The mobile communication device establishes a first session of a first UE.

[0583] 902. The mobile communication device transmits service data corresponding to the first IP address through the first session of the first UE.

[0584] Among them, for the description of steps 901 - 902, reference can be made to Figure 4 the description under steps 401 - 402 in the corresponding embodiment, which will not be elaborated here.

[0585] 903. The mobile communication device establishes a second session of a second UE.

[0586] Among them, the first session of the first UE is associated with the second session of the second UE.

[0587] 904. The session management network element stores the association relationship between the identifier of the second session of the second UE and the identifier of the first session of the first UE.

[0588] In the embodiments of the present application, after the session management network element stores the association relationship between the identifier of the first session of the first UE and the identifier of the second session of the second UE, the first session of the first UE and the second session of the second UE can share the same IP address and the same N4 session identifier. The identifier of the first session of the first UE is associated with the first IP address and the first N4 session identifier. Therefore, after the session management network element stores the association relationship between the identifier of the first session of the first UE and the identifier of the second session of the second UE, the identifier of the second session of the second UE is also associated with the first IP address and the first N4 session identifier. The session management network element does not need to allocate a new N4 session identifier and a new IP address for the second session of the second UE, and can reuse the first N4 session identifier and the first IP address.

[0589] Throughout the embodiments of the present application, storing the association relationship can also be understood as creating the association relationship.

[0590] In a possible embodiment, the specific implementation for a mobile communication device to establish a second session of a second UE is as follows: The mobile communication device sends a fifth message to a second network element. The fifth message carries information of a first session of a first UE, an identifier of the second session of the second UE, and a second session establishment request for requesting to establish the second session of the second UE.

[0591] Correspondingly, the second network element can receive the fifth message; the second network element sends a sixth message to a session management network element based on the fifth message. The sixth message carries the SUPI of the first UE, the identifier of the first session, the SUPI of the second UE, the identifier of the second session, and the second session establishment request. Correspondingly, the session management network element can receive the sixth message; the session management network element stores the association relationship between the identifier of the second session of the second UE and the identifier of the first session of the first UE in response to the sixth message.

[0592] Based on this possible embodiment, it is beneficial to successfully establish the second session of the second UE and store the association relationship between the first session of the first UE and the second session of the second UE.

[0593] Optionally, the fifth message is used to request to associate the second session of the second UE with the first session of the first UE, and the sixth message is used to request to associate the second session of the second UE with the first session of the first UE.

[0594] Optionally, the information of the first session of the first UE includes one or more of the following: the identifier of the first session of the first UE, the DNN corresponding to the first session of the first UE, the S-NSSAI corresponding to the first session of the first UE. Based on this possible embodiment, it is beneficial for the network side to accurately determine the first session of the first UE.

[0595] Optionally, the fifth message further includes the SUCI of the first UE or the SUPI of the first UE or a binding UE indication. Based on this possible embodiment, it is beneficial for the network side to determine the SUPI of the first UE.

[0596] In a possible embodiment, the mobile communication device may further receive second indication information, which indicates that the service data of the first session is allowed to be transmitted between different UEs, or indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs; the mobile communication device may send the fifth message according to the second indication information. That is to say, the mobile communication device sends the fifth message only when the service data of the first session is allowed to be transmitted between different UEs, or when the service data of the mobile communication device is allowed to be transmitted between different UEs. Based on this possible embodiment, it is beneficial for the mobile communication device to accurately determine whether the service data of the first session can be transmitted between different UEs.

[0597] Optionally, if the second indication information indicates that the service data of the mobile communication device is allowed to be transmitted between different UEs, that is, it indicates that all the service data of the mobile communication device is allowed to be transmitted between different UEs or indicates that the service data of all sessions of the mobile communication device is allowed to be transmitted between different UEs, the mobile communication device may also receive the second indication information from the policy control network element when registering with the first UE or the second UE. Correspondingly, the policy control network element may send the second indication information to the mobile communication device.

[0598] In a possible embodiment, when the first network element sends the SUPI of the first UE, the identifier of the first session, the DNN, the S-NSSAI, and the first session establishment request to the session management network element, the first indication information may also be sent. After receiving these information, if the session management network element determines that the service data corresponding to the first session of the first UE supports transmission between different UEs, the session management network element sends the second indication information to the first network element, so that the second network element sends the second indication information to the mobile communication device, and the second indication information indicates that the service data corresponding to the first session of the first UE supports transmission between different UEs. After receiving the second indication information, the mobile communication device may send the fifth message based on the second indication information.

[0599] That is to say, if the second indication information indicates that the service data of the first session is allowed to be transmitted between different UEs, the mobile communication device may receive the second indication information from the session management network element during the establishment of the first session. For example, for relevant descriptions, reference may also be made to Figure 10 the descriptions under steps 1001 to 1006 in the corresponding embodiment, which will not be elaborated here.

[0600] Among them, for the possible implementation manners in which the second network element sends the sixth message to the session management network element based on the fifth message, and other relevant introductions for establishing the second session of the second UE, reference may be made to Figure 10 the descriptions under steps 1008 to 1010 in the corresponding embodiment, which will not be elaborated here. Alternatively, the second session of the second UE may also be established by other means, which is not limited in the embodiments of the present application.

[0601] In a possible embodiment, the mobile communication device sends the fifth message to the second network element according to the directional policy information. Further, when the signal quality between the mobile communication device and the second access network device is good or higher than the set signal threshold, the mobile communication device sends the fifth message. For the implementation principle of the mobile communication device sending the fifth message to the second network element according to the directional policy information, reference may be made to the description under step 403 above, which will not be elaborated here.

[0602] In a possible embodiment, after the second network element receives the fifth message, ...

Claims

1. A service data processing method, applied to a mobile communication device, the mobile communication device including a first user equipment and a second user equipment, characterized in that, The method includes: The mobile communication device establishes a first session of a first user equipment, and the first session is associated with a first Internet Protocol address; The mobile communication device transmits service data corresponding to the first Internet Protocol address through the first session of the first user equipment; The mobile communication device sends a first message, and the first message carries information of the first session of the first user equipment, an identifier of a second session of the second user equipment, and a second session establishment request. The second session establishment request is used to request to establish the second session of the second user equipment. The first message is used to request to switch the service data of the first session of the first user equipment to the second session of the second user equipment for transmission; The mobile communication device transmits service data corresponding to the first Internet Protocol address through the second session of the second user equipment.

2. The method according to claim 1, characterized in that, The mobile communication device establishing the first session of the first user equipment includes: The mobile communication device selects the first user equipment according to the directional policy information and establishes the first session of the first user equipment; The directional policy information includes: the first user equipment is the preferentially selected user equipment; or, The directional policy information includes: the first network is the preferentially selected network; wherein, the first network is the network where the first user equipment camps; or, The directional policy information includes: the first radio access technology is the preferentially selected radio access technology; wherein, a first access network device corresponds to the first user equipment, and the first radio access technology is the radio access technology supported by the first access network device.

3. The method according to claim 1 or 2, characterized in that, The mobile communication device establishing the first session of the first user equipment includes: The mobile communication device sends an identifier of the first session of the first user equipment, a data network name, single network slice selection assistance information, a first session establishment request, and a first indication information. The first session establishment request is used to request to establish the first session of the first user equipment, and the first indication information indicates that the service data of the first session of the first user equipment may be transmitted between different user equipments.

4. The method according to any one of claims 1 to 3, characterized in that The method further includes: The mobile communication device receives second indication information, and the second indication information indicates that the service data of the first session is allowed to be transmitted between different user equipments, or indicates that the service data of the mobile communication device is allowed to be transmitted between different user equipments; The mobile communication device sending the first message includes: The mobile communication device sends the first message according to the second indication information.

5. The method according to any one of claims 1 to 4, characterized in that The mobile communication device sending the first message includes: When the signal quality between the mobile communication device and a first access network device deteriorates, or when the signal quality between the mobile communication device and the first access network device is lower than a first threshold, or when the quality of service (QoS) requirement of the first session of the first user equipment is not met, the mobile communication device sends the first message. The first access network device corresponds to the first user equipment.

6. The method according to any one of claims 1 to 5, characterized in that The information of the first session of the first user equipment includes one or more of the following: the identifier of the first session of the first user equipment, the data network name corresponding to the first session of the first user equipment, and the single network slice selection assistance information corresponding to the first session of the first user equipment.

7. The method according to any one of claims 1 to 6, characterized in that, The first message further includes the user hidden identifier of the first user equipment or the user permanent identifier of the first user equipment.

8. The method according to any one of claims 1 to 7, wherein The first message further includes a first handover indication, which is used to indicate that the service data of the first session of the first user equipment is to be switched to the second session of the second user equipment for transmission, or the first handover indication is used to indicate that the service data of the first session of the user equipment associated with the second user equipment is to be switched to the second session of the second user equipment for transmission.

9. A business data processing method, characterized in that, The method includes: A second network element receives a first message, where the first message carries the information of the first session of the first user equipment, the identifier of the second session of the second user equipment, and a second session establishment request for requesting the establishment of the second session of the second user equipment. The first message is used to request to switch the service data of the first session of the first user equipment to the second session of the second user equipment for transmission; The second network element sends a second message to a session management network element based on the first message. The second message carries the user permanent identifier of the first user equipment, the identifier of the first session, the user permanent identifier of the second user equipment, the identifier of the second session, and the second session establishment request. The second message is used to request to switch the service data of the first session of the first user equipment to the second session of the second user equipment for transmission. The session management network element is a network element that manages the first session of the first user equipment.

10. The method according to claim 9, wherein The information of the first session of the first user equipment includes one or more of the following: the identifier of the first session of the first user equipment, the data network name corresponding to the first session of the first user equipment, and the single network slice selection assistance information corresponding to the first session of the first user equipment.

11. The method according to claim 9 or 10, characterized in that, The first message further includes the user hidden identifier of the first user equipment or the user permanent identifier of the first user equipment.

12. According to the method according to any one of claims 9 to 11, characterized in that The information of the first session of the first user equipment is the identifier of the first session of the first user equipment; The second network element sending the second message to the session management network element based on the first message includes: The second network element obtains the user permanent identifier of the first user equipment and the identifier of the session management network element based on the device identifier information and the identifier of the first session; wherein, the device identifier information is the user permanent identifier of the second user equipment, or the first message further includes the user hidden identifier of the first user equipment, and the device identifier information is the user hidden identifier of the first user equipment; The second network element sends the second message to the session management network element.

13. The method according to claim 12, wherein The second network element obtains the user permanent identifier of the first user equipment and the identifier of the session management network element based on the device identifier information and the identifier of the first session, including: The second network element sends the device identifier information and the identifier of the first session to the unified data management network element; The second network element receives the user permanent identifier of the first user equipment and the identifier of the session management network element sent by the unified data management network element.

14. The method according to claim 12, wherein The second network element obtains the user permanent identifier of the first user equipment and the identifier of the session management network element based on the device identifier information and the identifier of the first session, including: The second network element sends the device identifier information to the authentication service function network element or the unified data management network element; The second network element receives the user permanent identifier of the first user equipment sent by the authentication service function network element or the unified data management network element; The second network element sends the user permanent identifier of the first user equipment and the identifier of the first session to the unified data management network element; The second network element receives the identifier of the session management network element sent by the unified data management network element.

15. The method according to any one of claims 9 to 11, characterized in that The information of the first session of the first user equipment includes the data network name corresponding to the first session of the first user equipment and / or the single network slice selection assistance information corresponding to the first session of the first user equipment; The second network element sends a second message to the session management network element based on the first message, including: The second network element obtains the user permanent identifier of the first user equipment, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first user equipment; wherein, the device identifier information is the user permanent identifier of the second user equipment, or the first message further includes the user hidden identifier of the first user equipment, and the device identifier information is the user hidden identifier of the first user equipment; The second network element sends the second message to the session management network element.

16. The method according to claim 15, wherein The second network element obtains the user permanent identifier of the first user equipment, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first user equipment, including: The second network element sends the device identifier information and the information of the first session of the first user equipment to the unified data management network element; The second network element receives the user permanent identifier of the first user equipment, the identifier of the session management network element, and the identifier of the first session sent by the unified data management network element.

17. The method according to claim 15, wherein The second network element obtains the user permanent identifier of the first user equipment, the identifier of the session management network element, and the identifier of the first session based on the device identifier information and the information of the first session of the first user equipment, including: The second network element sends the device identifier information to the authentication service function network element or the unified data management network element; The second network element receives the user permanent identifier of the first user equipment sent by the authentication service function network element or the unified data management network element; The second network element sends the permanent user identifier of the first user equipment and the information of the first session of the first user equipment to the unified data management network element; The second network element receives the identifier of the session management network element and the identifier of the first session sent by the unified data management network element.

18. The method according to any one of claims 9 to 17, characterized in that The first message and the second message further include a first handover indication, where the first handover indication is used to indicate that the service data of the first session of the first user equipment is switched to the second session of the second user equipment for transmission, or the first handover indication is used to indicate that the service data of the first session of the user equipment associated with the second user equipment is switched to the second session of the second user equipment for transmission.

19. A method for processing service data, characterized in that, The method includes: The first network element receives the identifier of the first session of the first user equipment, the data network name, the single network slice selection assistance information, the first session establishment request, and the first indication information. The first session establishment request is used to request the establishment of the first session of the first user equipment, and the first indication information indicates that the service data of the first session of the first user equipment may be transmitted between different user equipments; The first network element selects a session management network element based on the first indication information, and the session management network element supports the transmission of service data between different user equipments; The first network element sends the permanent user identifier of the first user equipment, the identifier of the first session, the data network name, the single network slice selection assistance information, and the first session establishment request to the session management network element.

20. The method according to claim 19, wherein The first network element sending the permanent user identifier of the first user equipment, the identifier of the first session, the data network name, the single network slice selection assistance information, and the first session establishment request to the session management network element includes: The first network element sends the permanent user identifier of the first user equipment, the identifier of the first session, the data network name, the single network slice selection assistance information, the first session establishment request, and the first indication information to the session management network element; The method further includes: The first network element receives the second indication information sent by the session management network element, and the second indication information indicates that the service data corresponding to the first session of the first user equipment supports transmission between different user equipments; The first network element sends the second indication information.

21. A business data processing method, characterized in that, The method includes: The session management network element receives a second message, which carries the permanent user identifier of the first user equipment, the identifier of the first session of the first user equipment, the permanent user identifier of the second user equipment, the identifier of the second session of the second user equipment, and the second session establishment request. The second session establishment request is used to request the establishment of the second session of the second user equipment. The second message is used to request to switch the service data of the first session of the first user equipment to the second session of the second user equipment for transmission. The session management network element is the network element that manages the first session of the first user equipment; In response to the second message, the session management network element sends the first N4 session identifier and the address information of the second access network device to the user plane function network element. The first N4 session identifier is the N4 session identifier associated with the identifier of the first session of the first user equipment. The first N4 session identifier and the address information of the second access network device are used to indicate that the service data carried by the first Internet protocol address corresponding to the first N4 session identifier is sent to the second access network device. The second access network device is used to carry the second session of the second user equipment. The first Internet protocol address is the Internet protocol address associated with the identifier of the first session of the first user equipment.

22. The method according to claim 21, wherein The method further includes: The session management network element stores the association relationship between the identifier of the first session of the first user equipment and the first Internet protocol address; In response to the second message, the session management network element stores the association relationship between the identifier of the second session of the second user equipment and the first Internet protocol address, and / or releases the association relationship between the identifier of the first session of the first user equipment and the first Internet protocol address.

23. The method according to claim 21 or 22, characterized in that, The method further includes: The session management network element stores the association relationship between the identifier of the first session of the first user equipment and the first N4 session identifier; In response to the second message, the session management network element stores the association relationship between the identifier of the second session of the second user equipment and the first N4 session identifier, and / or releases the association relationship between the identifier of the first session of the first user equipment and the first N4 session identifier.

24. The method according to any one of claims 21 to 23, characterized in that, The method further includes: The session management network element sends the address information of the user plane function network element to the second access network device, and / or the session management network element triggers the release of the first session.

25. The method according to any one of claims 21 to 24, characterized in that The second message further includes a first handover indication, which is used to indicate that the service data of the first session of the first user equipment is switched to the second session of the second user equipment for transmission, or the first handover indication is used to indicate that the service data of the first session of the user equipment associated with the second user equipment is switched to the second session of the second user equipment for transmission.

26. The method according to any one of claims 21 to 25, characterized in that Before the session management network element receives the second message, the method further includes: The session management network element receives the user permanent identifier of the first user equipment, the identifier of the first session, the data network name, the single network slice selection assistance information, the first session establishment request, and the first indication information. The first session establishment request is used to request the establishment of the first session of the first user equipment. The first indication information indicates that the service data of the first session of the first user equipment may be transmitted between different user equipments; The session management network element determines that the service data corresponding to the first session of the first user equipment supports transmission between different user equipments; The session management network element sends the second indication information, and the second indication information indicates that the service data corresponding to the first session of the first user equipment supports transmission between different user equipments.

27. The method according to claim 26, characterized in that, The session management network element determines that the service data corresponding to the first session of the first user equipment supports transmission between different user equipments, including: The session management network element determines that the service data corresponding to the first session of the first user equipment supports transmission between different user equipments based on the local configuration of the data network name; or, The session management network element determines that the service data corresponding to the first session of the first user equipment supports transmission between different user equipments based on the subscribed data or policy information corresponding to the first session.

28. A service data processing method, applied to a mobile communication device, the mobile communication device including a first user equipment and a second user equipment, characterized in that, The method includes: The mobile communication device selects a first user equipment according to the directional policy information and establishes a first session of the first user equipment; The directional policy information includes: the first user equipment is the preferentially selected user equipment; or, The directional policy information includes: the first network is the preferentially selected network; wherein, the first network is the network where the first user equipment camps; or, The directional policy information includes: the first radio access technology is the preferentially selected radio access technology; wherein, the first access network device corresponds to the first user equipment, and the first radio access technology is the radio access technology supported by the first access network device; The mobile communication device transmits service data through the first session of the first user equipment.

29. The method according to claim 28, wherein The method further includes: The mobile communication device sends a first message according to the directional policy information, and the first message is used to request to switch the service data of the first session of the first user equipment to the second session of the second user equipment for transmission.

30. A communication device, characterized in that, It includes a unit for executing the method according to any one of claims 1 to 29.

31. A communication device, characterized in that, It includes a processor and a memory, the processor is coupled with the memory, and the processor is used to implement the method according to any one of claims 1 to 29.

32. A chip, characterized in that, It includes a processor and an interface, the processor is coupled with the interface; the interface is used to receive or output signals, and the processor is used to execute code instructions to enable the method according to any one of claims 1 to 29 to be executed.

33. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called by the computer, the computer is enabled to execute the method according to any one of claims 1 to 29 above.

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