Method and apparatus for dedicated bearer recovery in sa network

Abstract

The application provides a method and device for restoring a dedicated bearer in an SA network, which comprises the following steps: in the case that an SMF deactivates a dedicated bearer of a wireless client, sending a recovery request of the dedicated bearer of the wireless client to a PCF; receiving a message of recovering the dedicated bearer issued by the PCF according to the recovery request, and informing a UPF to create the dedicated bearer according to the message of recovering the dedicated bearer; receiving a response message sent by the UPF, informing an AMF to create the dedicated bearer according to the response message sent by the UPF, so that the AMF informs a wireless terminal to create the dedicated bearer, and receiving a response message sent by the AMF. The application automatically enters a dedicated bearer recovery process in the case that the SMF deactivates the dedicated bearer of the wireless client, without the need of switching on or off the user terminal or flying, thereby improving the timeliness of the recovery after the dedicated bearer is disconnected, effectively guaranteeing the stability of the operation of the GBR service, improving the user experience, and being convenient to implement.

Description

Technical Field

[0001] This invention relates to the field of core network technology, and in particular to a method and apparatus for restoring proprietary bearers in an SA network. Background Technology

[0002] The 5G SA (Stand Alone) core network adopts a service-based architecture (SBA) that includes various network functions (NFs) such as AMF (Access and Mobility Management Function), SMF (Session Management Function), UPF (User Port Function), AUSF (Authentication Server Function), UDM (Unified Data Management), PCF (Policy Control Function), UDR (Unified Data Repository), NSSF (Network Slice Selection Function), and NRF (Network Repository Function). Figure 1 As shown.

[0003] Some game companies have created 5G zones within their game apps, offering differentiated services to meet customer needs. The business model is B2B2C, leveraging the ultra-high bandwidth and ultra-low latency of 5G, using a toC SA commercial network. This differentiated service addresses customer needs for establishing dedicated 5G bearers and ensuring stability during network switching, thereby enhancing the user experience for 5G gamers. The implementation plan involves opening a default bearer with 5QI=8 and a dedicated bearer with 5QI=4 for game customers, using the dedicated bearer to smooth game traffic. During actual project testing, it was found that user speeds sometimes did not reach the guaranteed speed of the dedicated bearer, such as the GBR=30M contract signed with PCF. By locating the SA network, it was discovered that clients sometimes dropped from the dedicated bearer, while the default bearer remained active, due to air interface ue-loss. The specific signaling flowchart is as follows. Figure 2 As shown, it includes the following steps:

[0004] 1. The wireless side requests the release of the dedicated carrier, and the reason for the release request is radio-connection-with-ue-lost(21).

[0005] 2. The AMF forwards this reason value 21 to the SMF.

[0006] 3a. After receiving this reason value, SMF requests PCF to deactivate the GBR QoS flow, that is, to deactivate the dedicated carrier 4.

[0007] 3b. PCF provides feedback on the application to SMF.

[0008] 4a. SMF notifies UPF to delete the GBR dedicated QoS flow;

[0009] 4b. The UPF provides feedback to the SMF.

[0010] 5. SMF notifies AMF to remove the dedicated download.

[0011] 6. AMF notifies wireless to delete dedicated loadout.

[0012] Currently, dedicated network access is only re-established when the user's IP address (Internet Protocol) or location changes. That is, once a dedicated network access is deactivated, it will not be restored unless the user restarts or uses a flyback function (i.e., re-attaches). Since user-lost connections are a common and unavoidable event on the wireless side, and users are unaware of changes in network speed while playing games and are unlikely to actively use flyback, dedicated network access recovery becomes even more difficult. Summary of the Invention

[0013] This invention provides a method and apparatus for recovering dedicated bearers in an SA network, which solves the problem of difficulty in recovering dedicated bearers after loss in the prior art, and realizes rapid automatic recovery without user operation after the dedicated bearer is lost.

[0014] This invention provides a method for restoring dedicated bearers in an SA network, comprising:

[0015] When the SMF deactivates the proprietary bearer of the wireless client, a request to restore the proprietary bearer of the wireless client is sent to the PCF.

[0016] Receive the message from the PCF to restore the dedicated bearer according to the recovery request, and notify the UPF to create the dedicated bearer according to the message to restore the dedicated bearer;

[0017] The system receives a response message from the UPF and, based on the response message from the UPF, notifies the AMF to create the dedicated bearer, so that the AMF can notify the wireless terminal to create the dedicated bearer, and receives a response message from the AMF.

[0018] According to a method for restoring a dedicated bearer in an SA network provided by the present invention, the step of sending a restoration request for the dedicated bearer of the wireless client to the PCF when the SMF deactivates the dedicated bearer of the wireless client includes:

[0019] During the process of the wireless client initiating registration with the SA network, the QoS policy is downloaded from the PCF, and the private bearer recovery policy subscribed by the wireless client is downloaded at the same time.

[0020] The dedicated bearer recovery strategy is subscribed to by the wireless client from the PCF based on the user's operation when the wireless client activates the dedicated bearer service.

[0021] When the SMF deactivates the proprietary bearer of the wireless client, a restoration request for the proprietary bearer of the wireless client is sent to the PCF according to the proprietary bearer restoration policy.

[0022] According to a method for restoring a dedicated bearer in an SA network provided by the present invention, the message for restoring the dedicated bearer is sent by the PCF when it is found that the wireless client has subscribed to the dedicated bearer restoration policy.

[0023] According to a method for restoring a dedicated bearer in an SA network provided by the present invention, the step of sending a request to the PCF to restore the dedicated bearer of the wireless client when the SMF deactivates the dedicated bearer of the wireless client includes:

[0024] Upon receiving a release reason value from the release request of the proprietary bearer sent by the AMF, the PCF sends a deactivation request for the proprietary bearer; wherein the release reason value is obtained by the AMF from the release request sent by the wireless client.

[0025] Receive the response message sent by the PCF, and notify the UPF to delete the dedicated bearer according to the response message sent by the PCF;

[0026] Upon receiving the response message sent by the UPF, and simultaneously notifying the AMF to delete the dedicated bearer based on the response message sent by the UPF, a request to restore the dedicated bearer of the wireless client is sent to the PCF.

[0027] According to the present invention, a method for restoring a dedicated bearer in an SA network is provided, wherein the dedicated bearer comprises multiple bearers;

[0028] The PCF sends the message to restore multiple dedicated bearers in sequence according to the IDs and downtime of the multiple dedicated bearers in the restoration request, in the order of downtime of each dedicated bearer.

[0029] According to a method for restoring a dedicated bearer in an SA network provided by the present invention, after notifying the UPF to create the dedicated bearer based on the message to restore the dedicated bearer, the method further includes:

[0030] If no response message is received from the UPF, the UPF is notified again to create the dedicated bearer according to the timer.

[0031] After receiving the response message sent by the UPF, the process further includes:

[0032] If the received response message from the UPF indicates that the dedicated bearer creation has failed, the UPF will be notified again to create the dedicated bearer according to the timer.

[0033] According to a method for restoring a dedicated bearer in an SA network provided by the present invention, after notifying the AMF to create the dedicated bearer based on the response message sent by the UPF, the method further includes:

[0034] If no response message is received from the AMF or if the response message from the AMF indicates that the AMF failed to create the dedicated bearer, the UPF is notified again to create the dedicated bearer according to the timer.

[0035] The present invention also provides a dedicated bearer recovery device in an SA network, comprising:

[0036] The request module is used to send a request to the PCF to restore the proprietary bearer of the wireless client when the SMF deactivates the proprietary bearer of the wireless client.

[0037] The first notification module is used to receive a message from the PCF to restore the dedicated bearer according to the recovery request, and to notify the UPF to create the dedicated bearer according to the message to restore the dedicated bearer;

[0038] The second notification module is used to receive the response message sent by the UPF, and according to the response message sent by the UPF, to notify the AMF to create the dedicated bearer, so that the AMF can notify the wireless terminal to create the dedicated bearer, and to receive the response message sent by the AMF.

[0039] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the proprietary bearer recovery method in any of the above-described SA networks.

[0040] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the dedicated bearer recovery method in any of the above-described SA networks.

[0041] The SA network dedicated bearer recovery method and apparatus provided by the present invention automatically enter the dedicated bearer recovery process when the dedicated bearer of the wireless client is deactivated by SMF, without requiring the user to restart or fly, which improves the timeliness of dedicated bearer recovery after disconnection, effectively ensures the stability of GBR service operation, enhances user experience, and is easy to implement. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the service-oriented architecture of the 5G SA core network provided by existing technologies;

[0044] Figure 2 This is a schematic diagram of the signaling interaction for the abnormal release of proprietary bearer provided by existing technology;

[0045] Figure 3 This is a flowchart illustrating the method for restoring dedicated bearers in an SA network provided by the present invention.

[0046] Figure 4 This is a schematic diagram of the signaling interaction of the dedicated bearer recovery method in the SA network provided by the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of the proprietary bearer recovery device in the SA network provided by the present invention;

[0048] Figure 6 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0050] The following is combined Figure 3The present invention describes a method for restoring a dedicated bearer in an SA network, comprising: step 301, sending a restoration request for the dedicated bearer of the wireless client to the PCF when the SMF deactivates the dedicated bearer of the wireless client;

[0051] Step 302: Receive the message from the PCF to restore the dedicated bearer according to the recovery request, and notify the UPF to create the dedicated bearer according to the message to restore the dedicated bearer;

[0052] Step 303: Receive the response message sent by the UPF, and notify the AMF to create the dedicated bearer according to the response message sent by the UPF, so that the AMF can notify the wireless terminal to create the dedicated bearer, and receive the response message sent by the AMF.

[0053] In this embodiment, the execution entity is the SMF. During user service usage, if the dedicated bearer is deactivated by the SMF for various reasons, such as a lost service, this embodiment adds a fast dedicated bearer recovery process. Figure 4 As shown, the specific steps are as follows:

[0054] 7a. When the SMF deactivates the dedicated bearer of the wireless client, it reports an NPCF_SmPolicyControlUpdateRequest message to the PCF, requesting the PCF to restore the dedicated bearer of the wireless client. This message can be reported within [timeframe missing]. Figure 4 This is done after step 6 in the process.

[0055] 7b. The PCF reissues the restoration of the dedicated bearer to the SMF, thereby restoring the GBR (Guaranteed Bit Rate) service of the wireless client.

[0056] 8a. SMF notifies UPF to create a dedicated GBR bearer QoS (Quality of Service) flow, i.e., to create a dedicated bearer.

[0057] 8b. The UPF sends a response message to the SMF indicating whether the creation of the private bearer was successful or not.

[0058] 9a. The SMF notifies the AMF to create a dedicated payload containing the PDU_RES_SETUP_REQ message.

[0059] 9b. The AMF notifies the wireless client to create a private bearer and sends a response message to the SMF. The response message includes whether the AMF successfully or failed to create the private bearer.

[0060] This embodiment automatically enters the dedicated bearer recovery process when the dedicated bearer of the wireless client is deactivated by SMF, without requiring the user to restart or fly, which improves the timeliness of dedicated bearer recovery after disconnection, effectively ensures the stability of GBR service operation, enhances user experience, and is easy to implement.

[0061] Based on the above embodiments, in this embodiment, when the SMF deactivates the dedicated bearer of the wireless client, sending the dedicated bearer recovery request of the wireless client to the PCF includes: during the process of the wireless client initiating registration with the SA network, downloading the QoS policy from the PCF and downloading the dedicated bearer recovery policy subscribed by the wireless client.

[0062] The dedicated bearer recovery strategy is subscribed to by the wireless client from the PCF based on the user's operation when the wireless client activates the dedicated bearer service.

[0063] A dedicated bearer recovery policy has been added to PCF. When a user activates a dedicated bearer service on the wireless client, they can subscribe to the dedicated bearer recovery policy as needed by checking a box.

[0064] During the user's registration process on the 5G SA network via a wireless client, the SMF downloads the QoS policy from the PCF and simultaneously downloads the dedicated bearer recovery policy subscribed to by the wireless client, storing it as a trigger. The dedicated bearer recovery policy is the program that executes the dedicated bearer recovery method in this embodiment.

[0065] When the SMF deactivates the proprietary bearer of the wireless client, a restoration request for the proprietary bearer of the wireless client is sent to the PCF according to the proprietary bearer restoration policy.

[0066] When a dedicated bearer is deactivated by the SMF for various reasons, the SMF reports the NPCF_SmPolicyControlUpdateRequest message to the PCF based on the user's subscription to notify the dedicated bearer status. The PCF then resends the message to restore the dedicated bearer and resume the user's GBR service.

[0067] This embodiment utilizes PCF to subscribe to new triggers, which are then monitored and triggered by SMF, thereby enabling rapid recovery after the loss of the 5G SA network private bearer without requiring the user to power off or restart the device or fly. Furthermore, this can be achieved with only minor modifications to the PCF and SMF software.

[0068] Based on the above embodiments, in this embodiment, the message to restore the dedicated bearer is sent by the PCF when it finds that the wireless client has subscribed to the dedicated bearer restoration policy.

[0069] Upon receiving a dedicated bearer recovery request from the SMF, the PCF queries whether the wireless client has subscribed to a dedicated bearer recovery policy. If the wireless client has not subscribed to a dedicated bearer recovery policy, it sends a message to the SMF stating that the dedicated bearer should not be recovered. Based on this message, the SMF does not notify the UPF to create the dedicated bearer. Only if the wireless client has subscribed to a dedicated bearer recovery policy does it send a message to the SMF stating that the dedicated bearer should be recovered.

[0070] Based on the above embodiments, the step of sending a request to the PCF to restore the dedicated bearer of the wireless client when the SMF deactivates the dedicated bearer of the wireless client includes: upon receiving a release reason value for the release request of the dedicated bearer sent by the AMF, sending a deactivation request for the dedicated bearer to the PCF; wherein the release reason value is obtained by the AMF from the release request sent by the wireless client; receiving a response message sent by the PCF, and notifying the UPF to delete the dedicated bearer according to the response message sent by the PCF; receiving a response message sent by the UPF, and simultaneously notifying the AMF to delete the dedicated bearer according to the response message sent by the UPF, and sending a request to the PCF to restore the dedicated bearer of the wireless client.

[0071] In this embodiment, when the SMF deactivates the dedicated bearer of the wireless client, it reports an NPCF_SmPolicyControlUpdateRequest message to the PCF, requesting the PCF to restore the dedicated bearer of the wireless client. This message reporting is related to... Figure 4 Step 5 in the process is performed simultaneously, thereby further improving the timeliness of dedicated bearer restoration.

[0072] Based on the above embodiments, this embodiment has multiple dedicated bearers; the message to restore multiple dedicated bearers is sent by the PCF in sequence according to the IDs and disconnection times of the multiple dedicated bearers in the recovery request, in the order of the disconnection times of each dedicated bearer.

[0073] If multiple dedicated bearers go offline, the PCF will send messages to restore each offline dedicated bearer in the order of their offline times in the recovery requests sent by the SCM.

[0074] Based on the above embodiments, after notifying the UPF to create the dedicated bearer according to the message of restoring the dedicated bearer in this embodiment, it further includes: if no response message is received from the UPF, notifying the UPF to create the dedicated bearer again according to a timer; after receiving the response message from the UPF, it further includes: if the received response message from the UPF indicates that the dedicated bearer creation has failed, notifying the UPF to create the dedicated bearer again according to the timer.

[0075] Specifically, if the SMF does not receive the response message from the UPF due to reasons such as the air interface not being restored, or if it receives the response message from the UPF but the response message indicates that the UPF failed to establish a dedicated bearer, then the SMF will send a message to the UPF to create a dedicated bearer every preset time interval (default 5 seconds) according to a timer. The number of times this message is sent is configurable.

[0076] Based on the above embodiments, this embodiment further includes, after notifying the AMF to create the dedicated bearer according to the response message sent by the UPF, that if no response message is received from the AMF or the response message sent by the AMF indicates that the AMF failed to create the dedicated bearer, the UPF is re-notified to create the dedicated bearer according to the timer.

[0077] Optionally, after receiving the response message sent by the UPF, if the response message indicates that the UPF has successfully created the private bearer, the SMF notifies the AMF to create the private bearer.

[0078] If the SMF does not receive the response message from the AMF due to reasons such as the air interface not being restored, or if it receives the response message from the AMF but the response message indicates that the AMF failed to establish a dedicated bearer, then the SMF will send a message to the AMF to create a dedicated bearer at preset intervals according to a timer. The number of times this message is sent is configurable.

[0079] The SA network dedicated bearer recovery device provided by the present invention will be described below. The SA network dedicated bearer recovery device described below and the SA network dedicated bearer recovery method described above can be referred to in correspondence.

[0080] like Figure 5 As shown, the device includes a request module 501, a first notification module 502, and a second notification module 503, wherein:

[0081] The request module 501 is used to send a request to the PCF to restore the proprietary bearer of the wireless client when the SMF deactivates the proprietary bearer of the wireless client.

[0082] The first notification module 502 is used to receive a message from the PCF to restore the dedicated bearer according to the recovery request, and to notify the UPF to create the dedicated bearer according to the message to restore the dedicated bearer;

[0083] The second notification module 503 is used to receive the response message sent by the UPF, and according to the response message sent by the UPF, to notify the AMF to create the dedicated bearer, so that the AMF can notify the wireless terminal to create the dedicated bearer, and to receive the response message sent by the AMF.

[0084] This embodiment automatically enters the dedicated bearer recovery process when the dedicated bearer of the wireless client is deactivated by SMF, without requiring the user to restart or fly, which improves the timeliness of dedicated bearer recovery after disconnection, effectively ensures the stability of GBR service operation, enhances user experience, and is easy to implement.

[0085] Figure 6 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 6 As shown, the electronic device may include a processor 610, a communications interface 620, a memory 630, and a communication bus 640. The processor 610, communications interface 620, and memory 630 communicate with each other via the communication bus 640. The processor 610 can call logical instructions in the memory 630 to execute a dedicated bearer recovery method in the SA network. This method includes: sending a dedicated bearer recovery request to the PCF when the SMF deactivates the dedicated bearer of the wireless client; receiving a dedicated bearer recovery message from the PCF based on the recovery request, and notifying the UPF to create a dedicated bearer based on the dedicated bearer recovery message; receiving a response message from the UPF, and notifying the AMF to create a dedicated bearer based on the response message from the UPF, so that the AMF can notify the wireless terminal to create a dedicated bearer, and receiving a response message from the AMF.

[0086] Furthermore, the logical instructions in the aforementioned memory 630 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0087] On the other hand, the present invention also provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein when the program instructions are executed by a computer, the computer is able to execute the dedicated bearer recovery method in the SA network provided by the above methods, the method comprising: sending a dedicated bearer recovery request for the wireless client to the PCF when the SMF deactivates the dedicated bearer of the wireless client; receiving a dedicated bearer recovery message issued by the PCF according to the recovery request, and notifying the UPF to create a dedicated bearer according to the dedicated bearer recovery message; receiving a response message sent by the UPF, and notifying the AMF to create a dedicated bearer according to the response message sent by the UPF, so that the AMF can notify the wireless terminal to create a dedicated bearer, and receiving a response message sent by the AMF.

[0088] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, is implemented to perform the dedicated bearer recovery methods in the SA network provided above. The method includes: sending a dedicated bearer recovery request to the PCF when the SMF deactivates the dedicated bearer of the wireless client; receiving a dedicated bearer recovery message issued by the PCF according to the recovery request, and notifying the UPF to create a dedicated bearer according to the dedicated bearer recovery message; receiving a response message sent by the UPF, and notifying the AMF to create a dedicated bearer according to the response message sent by the UPF, so that the AMF can notify the wireless terminal to create a dedicated bearer, and receiving a response message sent by the AMF.

[0089] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0090] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for restoring a dedicated bearer in an SA network, characterized in that, include: When the SMF deactivates the dedicated bearer of a wireless client, a restoration request for the dedicated bearer of the wireless client is sent to the PCF. Specifically, this includes: during the process of the wireless client initiating registration with the SA network, simultaneously downloading the QoS policy from the PCF and storing the dedicated bearer restoration policy subscribed to by the wireless client as a trigger; wherein, the dedicated bearer restoration policy is subscribed to by the wireless client from the PCF based on user operations when the wireless client activates the service on the dedicated bearer; the user operations include a checkbox selection method. Upon receiving a release reason value from the release request of the proprietary bearer sent by the AMF, a deactivation request for the proprietary bearer is sent to the PCF; wherein the release reason value is obtained by the AMF from the release request sent by the wireless client; Receive the response message sent by the PCF, and notify the UPF to delete the dedicated bearer according to the response message sent by the PCF; Receive the response message sent by the UPF, notify the AMF to delete the dedicated bearer according to the response message sent by the UPF, and at the same time send the wireless client's dedicated bearer recovery request to the PCF; Receive the message from the PCF to restore the dedicated bearer according to the recovery request, and notify the UPF to create the dedicated bearer according to the message to restore the dedicated bearer; The system receives a response message from the UPF and, based on the response message from the UPF, notifies the AMF to create the dedicated bearer, so that the AMF can notify the wireless client to create the dedicated bearer, and receives a response message from the AMF.

2. The method for restoring dedicated bearers in an SA network according to claim 1, characterized in that, The message to restore the dedicated bearer is sent by the PCF after it is found that the wireless client has subscribed to the dedicated bearer restoration policy.

3. The method for restoring a dedicated bearer in an SA network according to any one of claims 1-2, characterized in that, The proprietary bearer has multiple components; The PCF sends the message to restore multiple dedicated bearers in sequence according to the IDs and downtime of the multiple dedicated bearers in the restoration request, in the order of downtime of each dedicated bearer.

4. The method for restoring a dedicated bearer in an SA network according to any one of claims 1-2, characterized in that, After notifying the UPF to create the dedicated bearer according to the message to restore the dedicated bearer, the method further includes: If no response message is received from the UPF, the UPF is notified again to create the dedicated bearer according to the timer. After receiving the response message sent by the UPF, the process further includes: If the received response message from the UPF indicates that the dedicated bearer creation has failed, the UPF will be notified again to create the dedicated bearer according to the timer.

5. The method for restoring a dedicated bearer in an SA network according to claim 4, characterized in that, After notifying the AMF to create the dedicated bearer based on the response message sent by the UPF, the process further includes: If no response message is received from the AMF or if the response message from the AMF indicates that the AMF failed to create the dedicated bearer, the UPF is notified again to create the dedicated bearer according to the timer.

6. A proprietary bearer recovery device in an SA network, characterized in that, include: The request module is used to send a recovery request for the dedicated bearer of the wireless client to the PCF when the SMF deactivates the dedicated bearer of the wireless client. Specifically, this includes: during the wireless client's registration process with the SA network, downloading the QoS policy from the PCF and simultaneously downloading the dedicated bearer recovery policy subscribed to by the wireless client, storing it as a trigger; wherein, the dedicated bearer recovery policy is subscribed to by the wireless client from the PCF based on user operation when the wireless client activates the service on the dedicated bearer; the user operation includes a checkbox selection method; upon receiving the release reason value of the dedicated bearer release request sent by the AMF, sending a deactivation request for the dedicated bearer to the PCF; wherein, the release reason value is obtained by the AMF from the release request sent by the wireless client; receiving a response message sent by the PCF, and notifying the UPF to delete the dedicated bearer based on the response message sent by the PCF; receiving a response message sent by the UPF, and simultaneously notifying the AMF to delete the dedicated bearer based on the response message sent by the UPF, and sending a recovery request for the dedicated bearer of the wireless client to the PCF. The first notification module is used to receive a message from the PCF to restore the dedicated bearer according to the recovery request, and to notify the UPF to create the dedicated bearer according to the message to restore the dedicated bearer; The second notification module is used to receive the response message sent by the UPF, and according to the response message sent by the UPF, to notify the AMF to create the dedicated bearer, so that the AMF can notify the wireless client to create the dedicated bearer, and to receive the response message sent by the AMF.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the dedicated bearer recovery method in the SA network as described in any one of claims 1 to 5.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the dedicated bearer recovery method in an SA network as described in any one of claims 1 to 5.

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