WO2024125117A1

WO2024125117A1 - Redundant resource recycling processing method and device, and storage medium and electronic device

Info

Publication number: WO2024125117A1
Application number: PCT/CN2023/127897
Authority: WO
Inventors: 张鲁遥; 王翠钟
Original assignee: 中兴通讯股份有限公司
Priority date: 2022-12-12
Filing date: 2023-10-30
Publication date: 2024-06-20
Also published as: CN118200991A

Abstract

Embodiments of the present disclosure provide a redundant resource recycling processing method and device, and a storage medium and an electronic device. The method comprises: transmitting an interface request message between a sending end SMF and a receiving end SMF, the interface message carrying a resource identifier; transmitting, between the sending end SMF and the receiving end SMF, an interface response message after verifying a resource corresponding to the resource identifier, the interface response message carrying a resource state; determining a redundant resource on the basis of the resource state by means of the sending end SMF or the receiving end SMF; and performing recycling processing on the redundant resource by means of the sending end SMF or the receiving end SMF.

Description

A redundant resource recovery processing method, device, storage medium and electronic device

CROSS-REFERENCE TO RELATED APPLICATIONS

This disclosure is based on Chinese patent application CN202211611440.1, filed on December 12, 2022, entitled “A method, device, storage medium and electronic device for recycling redundant resources”, and claims the priority of the patent application, and all its disclosed contents are incorporated into this disclosure by reference.

Technical Field

The embodiments of the present disclosure relate to the field of communications, and in particular, to a redundant resource recovery processing method, device, storage medium, and electronic device.

Background technique

Figure 1 is an architecture diagram of a 5G system in a home routing roaming mode in the related art. As shown in Figure 1, it mainly includes: V-SMF (Visit Session Management Function) and H-SMF (Home Session Management Function).

FIG2 is an architecture diagram of a 5G system in a local roaming mode in the related art. As shown in FIG2 , it mainly includes: I-SMF (Intermediate Session Management Function) and SMF (Session Management Function). The SMF with I-SMF is defined as A-SMF.

A-SMF and H-SMF are home SMFs used for billing and policy control. I-SMF and V-SMF are used to transmit signaling between AMF and A/H-SMF. For the convenience of description, PSA-SMF and I/V-SMF can be used instead. In normal scenarios, the user context information of I/V-SMF and PSA-SMF should be consistent. However, in abnormal scenarios, the user, session, and QoS Flow (Quality of Service) context resources of the two may be inconsistent, resulting in waste of resources and affecting the subsequent user experience.

In roaming state, after the user hangs up after making a voice call, PSA-SMF sends an update message to I/V-SMF to delete QoS Flow. Due to network fluctuations, I/V-SMF does not receive the message. After waiting for the response timeout, PSA-SMF deletes the QoS Flow context, resulting in inconsistent resources on both sides. If the user makes another call, I/V-SMF will create QoS Flow repeatedly, and I/V-SMF may handle the exception, and the user cannot make a phone call to complain.

In the roaming state, PSA-SMF initiates session release. In the event of an exception, it does not send a release request to I/V-SMF. Eventually, PSA-SMF and other network-side NFs release the session, but the I/V-SMF, AMF, and base station still have a session. The subsequent session update process initiated by the UE or base station will fail.

In the roaming state, the I/V-SMF process is removed, and the AMF sends a release message to the I/V-SMF to be released. If the AMF handles the exception and does not send the message, the entire user information of the I/V-SMF will be stuck, and no further messages will be received, resulting in a waste of resources. In severe cases, the resources on the entire SMF may be fully occupied.

There is no solution yet for the problem in the related art that inconsistency of resources between SMFs in roaming state leads to abnormal processing, session update failure and waste of resources.

Summary of the invention

The embodiments of the present disclosure provide a redundant resource recovery processing method, apparatus, storage medium and electronic device to at least solve the problem in the related art that inconsistency of resources between SMFs in a roaming state leads to abnormal processing, session update failure and resource waste.

According to an embodiment of the present disclosure, a redundant resource recovery processing method is provided, which is applied to the network side, and the method includes: transmitting an interface request message between a sending end SMF and a receiving end SMF, wherein the interface message carries a resource identifier; transmitting an interface response message after verifying the resources corresponding to the resource identifier between the sending end SMF and the receiving end SMF, wherein the interface response message carries a resource status; determining redundant resources based on the resource status through the sending end SMF or the receiving end SMF; and recovering redundant resources through the sending end SMF or the receiving end SMF.

According to another embodiment of the present disclosure, a redundant resource recovery processing device is also provided, which is applied to the network side, and the device includes: a first transmission module, which is used to transmit an interface request message between a sending end SMF and a receiving end SMF, wherein the interface message carries a resource identifier; a second transmission module, which is used to transmit an interface response message after resource verification corresponding to the resource identifier between the sending end SMF and the receiving end SMF, wherein the interface response message carries a resource status; a determination module, which is used to determine redundant resources based on the resource status through the sending end SMF or the receiving end SMF; and a recovery processing module, which is used to recycle redundant resources through the sending end SMF or the receiving end SMF.

According to another embodiment of the present disclosure, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

According to another embodiment of the present disclosure, an electronic device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an architecture diagram of a 5G system in a home routing roaming mode in the related art;

FIG2 is an architecture diagram of a 5G system in a local roaming mode in the related art;

3 is a hardware structure block diagram of a computer device of a redundant resource recovery processing method according to an embodiment of the present disclosure;

FIG4 is a flow chart of a redundant resource recovery processing method according to an embodiment of the present disclosure;

Figure 5 is a flowchart 1 of QoS Flow redundant resource recovery according to an embodiment of the present disclosure;

Figure 6 is a second flowchart of QoS Flow redundant resource recovery according to an embodiment of the present disclosure;

Figure 7 is a flowchart 3 of QoS Flow redundant resource recovery according to an embodiment of the present disclosure;

FIG8 is a fourth flowchart of QoS Flow redundant resource recovery according to an embodiment of the present disclosure;

FIG9 is a flowchart 1 of session redundant resource recovery according to an embodiment of the present disclosure;

FIG10 is a second flowchart of session redundant resource recovery according to an embodiment of the present disclosure;

FIG11 is a third flowchart of session redundant resource recovery according to an embodiment of the present disclosure;

FIG12 is a fourth flowchart of session redundant resource recovery according to an embodiment of the present disclosure;

FIG13 is a flowchart 1 of user redundant resource recovery according to an embodiment of the present disclosure;

FIG14 is a second flowchart of user redundant resource recovery according to an embodiment of the present disclosure;

FIG. 15 is a block diagram of a redundant resource recovery processing device according to an embodiment of the present disclosure.

Detailed ways

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

It should be noted that the terms "first" and "second" in the specification and claims of the present disclosure and the above drawings are used interchangeably. The terms "etc." and "etc." are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

The method embodiments provided in the embodiments of the present disclosure can be executed in a computer device or a similar computing device. Taking running on a computer device as an example, FIG3 is a hardware structure block diagram of a computer device of the redundant resource recovery processing method of the embodiment of the present disclosure. As shown in FIG3, the computer device may include one or more (only one is shown in FIG3) processors 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device) and a memory 104 for storing data, wherein the above-mentioned computer device may also include a transmission device 106 and an input and output device 108 for communication functions. It can be understood by those skilled in the art that the structure shown in FIG3 is only for illustration, and it does not limit the structure of the above-mentioned computer device. For example, the computer device may also include more or fewer components than those shown in FIG3, or have a configuration different from that shown in FIG3.

The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the redundant resource recovery processing method in the embodiment of the present disclosure. The processor 102 executes various functional applications and redundant resource recovery processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the computer device. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (Radio Frequency, referred to as RF) module, which is used to communicate with the Internet wirelessly.

In this embodiment, a redundant resource recovery processing method running on the above-mentioned computer device is provided. FIG4 is a flow chart of the redundant resource recovery processing method according to an embodiment of the present disclosure. As shown in FIG4, it is applied to the network side. The process includes the following steps:

Step S402, transmitting an interface request message between the sending end SMF and the receiving end SMF, wherein the interface message carries a resource identifier;

Step S404, transmitting an interface response message after checking the resource corresponding to the resource identifier between the sending end SMF and the receiving end SMF, wherein the interface response message carries a resource status;

Step S406, determining redundant resources based on the resource status through the transmitting end SMF or the receiving end SMF;

Step S408: Recycling the redundant resources through the sending-end SMF or the receiving-end SMF.

Through the above steps S402 to S408, the problems in the related technology of abnormal processing, session update failure and resource waste caused by inconsistent resources between SMFs in the roaming state can be solved. When the resources between SMFs are inconsistent when the user is roaming, the redundant resources are recycled, thereby avoiding abnormal processing, session update failure and resource waste caused by inconsistent resources between SMFs.

In this embodiment, the above step S402 may specifically include: sending an interface request message for verifying resources to the receiving-end SMF through the sending-end SMF; or receiving an interface request message sent by the receiving-end SMF through the sending-end SMF.

In this embodiment, the above step S404 may specifically include: in the case where the transmitting end SMF sends an interface request message for verifying resources to the receiving end SMF, the receiving end SMF verifies the resource corresponding to the resource identifier; Verification, receiving the interface response message sent by the receiving-end SMF after verifying the resources corresponding to the resource identifier through the sending-end SMF; in the case of receiving the interface request message sent by the receiving-end SMF through the sending-end SMF, verifying the resources corresponding to the resource identifier through the sending-end SMF, and then sending the interface response message to the receiving-end SMF.

In one embodiment, verifying the resource corresponding to the resource identifier through the receiving-end SMF may specifically include: the resource identifier includes a user identifier, a session identifier, and a QoS Flow identifier corresponding to the session identifier; determining through the receiving-end SMF whether the receiving-end SMF has the user identifier of the sending-end SMF carried in the interface request message; when the determination result is that the user identifier does not exist, determining that the verification result is that the user resources of the receiving-end SMF are less than the user resources of the sending-end SMF, and the resource status is that the user identifier does not exist; when the determination result is that the user identifier exists, determining through the receiving-end SMF whether the receiving-end SMF has the session identifier of the sending-end SMF carried in the interface request message; when the determination result is that the session identifier does not exist, determining that the verification result is that the session resources of the receiving-end SMF are less than the session resources of the sending-end SMF, and the resource status is that the session identifier does not exist; when the determination result is that the session identifier exists In this case, determine whether there are redundant session resources of the session resources of the receiving-end SMF; if there are redundant session resources, determine that the verification result is that the session resources of the receiving-end SMF are more than the session resources of the sending-end SMF, and determine that the resource status is that the session identifier exists; if there are no redundant session resources, determine, through the receiving-end SMF, whether the receiving-end SMF has the QoS Flow identifier of the sending-end SMF carried in the interface request message; when the determination result is that the QoS Flow identifier does not exist, determine that the verification result is that the QoS Flow resources of the receiving-end SMF are less than the QoS Flow resources of the sending-end SMF, and the resource status is that the QoS Flow identifier does not exist; when the determination result is that the QoS Flow identifier exists, determine that the verification result is that the QoS Flow resources of the receiving-end SMF are greater than or equal to the QoS Flow resources of the sending-end SMF, and the resource status is that the QoS Flow identifier exists.

In another embodiment, verifying the resource corresponding to the resource identifier through the sending SMF may specifically include: the resource identifier includes a user identifier, a session identifier, and a QoS Flow identifier corresponding to the session identifier; determining through the sending SMF whether the sending SMF has the user identifier of the receiving SMF carried in the interface request message; when the determination result is that the user identifier does not exist, determining that the verification result is that the user resources of the sending SMF are less than the user resources of the receiving SMF, and the resource status is that the user identifier does not exist; when the determination result is that the user identifier exists, determining through the sending SMF whether the sending SMF has the session identifier of the receiving SMF carried in the interface request message; when the determination result is that the session identifier does not exist, determining that the verification result is that the session resources of the sending SMF are less than the session resources of the receiving SMF, and the resource status is that the session identifier does not exist; when the determination result is that the session identifier exists In this case, determine whether there are redundant session resources of the session resources of the sending end SMF; if there are redundant session resources, determine that the verification result is that the session resources of the sending end SMF are more than the session resources of the receiving end SMF, and determine that the resource status is that the session identifier exists; if there are no redundant session resources, determine through the sending end SMF whether the sending end SMF has the QoS Flow identifier of the receiving end SMF carried in the interface request message; when the determination result is that the QoS Flow identifier does not exist, determine that the verification result is that the QoS Flow resources of the sending end SMF are less than the QoS Flow resources of the receiving end SMF, and the resource status is that the QoS Flow identifier does not exist; when the determination result is that the QoS Flow identifier exists, determine that the verification result is that the QoS Flow resources of the sending end SMF are greater than or equal to the QoS Flow resources of the receiving end SMF, and the resource status is that the QoS Flow identifier exists.

In this embodiment, the above step S406 may specifically include: the user resources of the SMF at the receiving end are less than the user resources of the SMF at the sending end. In the case of user resources of the receiving-end SMF, the sending-end SMF determines, based on the resource status, that the user resources that do not exist in the receiving-end SMF are the redundant resources; in the case of QoS Flow resources of the receiving-end SMF being less than the QoS Flow resources of the sending-end SMF, the sending-end SMF determines, based on the resource status, that the session resources that do not exist in the receiving-end SMF are the redundant resources; in the case of QoS Flow resources of the receiving-end SMF being less than the QoS Flow resources of the sending-end SMF, the sending-end SMF determines, based on the resource status, that the QoS Flow resources that do not exist in the receiving-end SMF are the redundant resources; in the case of user resources of the sending-end SMF being less than the user resources of the receiving-end SMF, the receiving-end SMF determines, based on the resource status, that the user resources that do not exist in the sending-end SMF are the redundant resources; in the case of QoS Flow resources of the sending-end SMF being less than the QoS Flow resources of the receiving-end SMF, the receiving-end SMF determines, based on the resource status, that the session resources that do not exist in the sending-end SMF are the redundant resources; in the case of QoS Flow resources of the sending-end SMF being less than the QoS Flow resources of the receiving-end SMF In the case of QoS Flow resources, the receiving-end SMF determines, based on the resource status, that the QoS Flow resources that do not exist in the sending-end SMF are the redundant resources.

In this embodiment, the above-mentioned step S408 may specifically include: when the resources of the sending end SMF are more than the resources of the receiving end SMF, sending an N1N2 message to the AMF through the sending end SMF, so that the base station and the UE release the redundant resources through the AMF, receiving a response message returned by the AMF after the base station and the UE release the redundant resources, and releasing the redundant resources in the sending end SMF; or when the resources of the sending end SMF are less than the resources of the receiving end SMF, sending a release request message for releasing the redundant resources to the H-UPF and PCF through the receiving end SMF, receiving a release response message sent by the H-UPF and the PCF after releasing the redundant resources, and releasing the redundant resources in the receiving end SMF.

In this embodiment, it is assumed that the resources of the I/V-SMF are consistent with those of the forward NF, and the resources of the PSA-SMF are consistent with those of the backward NF.

A new message for the N16 interface is added, which contains the user identifier (Supi, Pei, Gpsi), session identifier (Pdu Session Id list), and QoS Flow identifier (Qfi list), indicating the resource identifier of a single user of the SMF. I/V-SMF and PSA-SMF send this message to each other. The sending SMF sends this message, and after the receiving SMF receives the message, it verifies whether the resource exists locally and replies with a response message, carrying the identifier and status information in the request message. After verification, the basic processing principle of the sending and receiving ends is to release the redundant parts of themselves and the surrounding NFs if the user, session or QoS Flow resources are inconsistent. The logic is as follows:

The sender sends a request message. After receiving the request message, if the receiver determines that its own resources are missing, the response message carries the status of each resource. After receiving the response, the sender initiates the corresponding resource release process to the surrounding NF and releases itself. If it is determined that it has excess resources, after returning the response, it releases its own and surrounding NF corresponding resources. When sending a message to the surrounding NF to release resources, the I/V-SMF sends a message to the forward NF, and the PSA-SMF sends a message to the network side NF.

When the QoS Flow resources of I/V-SMF are more than those of PSA-SMF, both can recycle the redundant resources to keep them consistent. FIG5 is a flowchart of QoS Flow redundant resource recycling according to an embodiment of the present disclosure, as shown in FIG5, including:

1. I/V-SMF sends Nsmf_ResourceCheck Request (resource check request) to PSA-SMF, including Supi, Pei, Gpsi, Pdu Session Id list, and Qfi list;

2. After receiving the request, PSA-SMF checks with local resources and returns Nsmf_ResourceCheck Response (resource check response) to I/V-SMF, carrying the status of each resource (user, session, QosFlow);

3. I/V-SMF determines that PSA-SMF lacks some QoS Flows based on the resource status in the resource check response, and then sends a Namf_Communication_N1N2Message Transfer message (transmitting N1N2 message) to the forward direction, carrying N2 PDU Session Resource Modify Request Transfer and N1 PDU Session Modification Command messages;

4. AMF sends N2 Session Request to (R)AN, and (R)AN deletes QosFlow.

5. (R)AN sends an AN-specific resource modification message for deleting QosFlow to UE. The resource modification message includes a session modification request or a session request response.

6. After (R)AN completes deleting QosFlow, it replies N2 Session Request to AMF.

7a, AMF transmits the (R)AN's response PDU Session Resource Modify Response to I/V-SMF through Nsmf_PDU Session_UpdateSMContext Request (session update request);

7b, AMF receives Nsmf_PDU Session_UpdateSMContext Response (session update response) returned by I/V-SMF;

8a, I/V-UPF sends N4 Session Modification Request to I/V-SMF;

8b, I/V-UPF receives N4 Session Modification Response returned by I/V-SMF;

9. After the UE completes deleting the QosFlow, it replies PDU Session Modification Command Ack (session modification response) to R (AN);

10. (R)AN transparently transmits the UE's response PDU Session Modification Complete to AMF through N2 NAS uplink transfer.

11a, AMF transparently transmits the UE's session modification response to I/V-SMF through Nsmf_PDU Session_UpdateSMContext Request (session update request);

11b, AMF receives Nsmf_PDU Session_UpdateSMContext Response (session update response) returned by I/V-SMF;

12a, I/V-SMF sends N4 Session Modification Request to I-UPF;

12b, I/V-SMF sends N4 Session Modification Response to I-UPF;

13. I/V-SMF deletes local QosFlow resources.

FIG6 is a second flowchart of QoS Flow redundant resource recovery according to an embodiment of the present disclosure, as shown in FIG6 , including:

1. PSA-SMF sends Nsmf_ResourceCheck Request (resource check request) to I/V-SMF, including Supi, Pei, Gpsi, Pdu Session Id list and Qfi list;

2. After receiving the request, I/V-SMF verifies the local resources and returns Nsmf_ResourceCheck Response (resource check response) to PSA-SMF, carrying the status of each resource (user, session, QosFlow);

4. AMF sends N2 Session Request to (R)AN, and (R)AN deletes QosFlow.

5. (R)AN sends an AN-specific resource modification message to delete the QosFlow to the UE. The resource modification message includes a session modification request or a session request response.

8a, I/V-UPF sends N4 Session Modification Request to I/V-SMF;

8b, I/V-UPF receives N4 Session Modification Response returned by I/V-SMF;

10. (R)AN transparently transmits the UE's response PDU Session Modification Complete to AMF through N2 NAS uplink ttansfer (uplink message transmission);

12a, I/V-SMF sends N4 Session Modification Request to I-UPF;

12b, I/V-SMF sends N4 Session Modification Response to I-UPF;

13. I/V-SMF deletes local QosFlow resources.

When the QoS Flow resources of I/V-SMF are less than those of PSA-SMF, the redundant resources can be recycled to keep them consistent. FIG7 is a flowchart of QoS Flow redundant resource recycling according to an embodiment of the present disclosure, as shown in FIG7, including:

1. I/V-SMF sends Nsmf_Resource Check Request to PSA-SMF, including Supi, Pei, Gpsi, Pdu Session Id list and Qfi list;

2. After receiving the resource check request, PSA-SMF checks with local resources and determines that it has some additional QoS Flows. It returns Nsmf_ResourceCheck Response (resource check response) with the status of each resource (user, session, QoSFlow);

3a, PSA-SMF initiates the QosFlow release process through N4 Session Modification Request, and sends an update message to H-UPF to release the redundant QoS Flow;

3b, PSA-SMF receives the N4 Session Modification Response returned by H-UPF

4. PSA-SMF sends an update message to PCF through SMF initiated SM Policy Association Modification to inform the deletion of Qos Flow. After PSA-SMF receives the response, the process ends and the local QosFlow resources are deleted.

FIG8 is a fourth flowchart of QoS Flow redundant resource recovery according to an embodiment of the present disclosure, as shown in FIG8 , including:

1. PSA-SMF sends Nsmf_Resource Check Request to I/V-SMF, including Supi, Pei, Gpsi, Pdu Session Id list and Qfi list;

2. After receiving the resource check request, I/V-SMF checks with local resources and determines that it has some additional QoS Flows. It returns Nsmf_ResourceCheck Response (resource check response) with the status of each resource (user, session, QoSFlow);

3b, PSA-SMF receives the N4 Session Modification Response returned by H-UPF

When the session resources of I/V-SMF are more than those of PSA-SMF, the redundant resources can be recycled to keep them consistent. FIG9 is a flowchart of session redundant resource recycling according to an embodiment of the present disclosure, as shown in FIG9 , including:

3a. According to the resource status in the response message, PSA-SMF determines that it lacks resources for some sessions, and initiates the session release process. I/V-SMF sends N4 Session Release Request to I/V-UPF;

3b, I/V-SMF receives N4 Session Release Response sent by I/V-UPF;

4. I/V-SMF sends Namf_Communication_N1N2Message Transfer (N1N2 message transmission) to AMF, carrying N1 PDU Session Release Command and N2 PDU Session Resource Release Command Transfer messages to release the session resources of UE and (R)AN;

5. AMF sends N2 Session Release Request to (R)AN so that (R)AN releases session resources.

6. (R)AN sends AN-specific resource modification message to UE so that UE can release session resources.

7. (R)AN replies N2 Session Release Response to AMF.

8a, AMF transmits the (R)AN's response PDU Session Resource Modify Response to I/V-SMF through Nsmf_PDU Session_UpdateSMContext Request (session update request);

8b, AMF receives Nsmf_PDU Session_UpdateSMContext Response (session update response) returned by I/V-SMF;

9. UE returns PDU session Release Accept to (R)AN;

10. (R)AN transparently transmits the UE release message to AMF through N2 NAS uplink transfer.

11a, AMF transparently transmits N1's PDU Session Release Ack message to I/V-SMF through Nsmf_PDU Session_UpdateSMContext Request (session update request);

12. I/V-SMF sends Nsmf_PDUSession_SMContextStatus Notify (session context status notification) to AMF to release AMF's session resources;

13. I/V-SMF releases its own session resources.

FIG. 10 is a second flowchart of session redundant resource recovery according to an embodiment of the present disclosure, as shown in FIG. 10 , including:

2. After receiving the request, I/V-SMF checks with local resources and returns Nsmf_ResourceCheck Response (resource check response) to PSA-SMF, carrying the status of each resource (user, session, QosFlow);

3b, I/V-SMF receives N4 Session Release Response sent by I/V-UPF;

7. (R)AN replies N2 Session Release Response to AMF.

9. UE returns PDU session Release Accept to (R)AN;

13. I/V-SMF releases its own session resources.

When the session resources of the I/V-SMF are less than those of the PSA-SMF, the redundant resources can be recycled to keep them consistent. FIG11 is a flowchart of session redundant resource recycling according to an embodiment of the present disclosure, as shown in FIG11 , including:

2. After receiving the request, PSA-SMF checks with local resources and finds that its own SMF has extra session resources. It returns Nsmf_ResourceCheck Response (resource check response) with the status of each resource (user, session, QosFlow);

3a, PSA-SMF starts to initiate the session release process to release redundant session resources and sends N4 Session Release Request to H-UPF;

3b, PSA-SMF receives the N4 Session Release Request (N4 Session Release Response) returned by H-UPF;

4. H-UPF sends SMF initiated SM Policy Association Modification to PCF, i.e. initiates session release request, and receives response. The process ends, and the redundant session resources are released.

FIG. 12 is a fourth flowchart of session redundant resource recovery according to an embodiment of the present disclosure, as shown in FIG. 12 , including:

1. PSA-SMF sends Nsmf_ResourceCheck Request (resource check request) to I/V-SMF, including Supi, Pei, Gpsi, Pdu Session Id list, Qfi list;

2. After receiving the request, I/V-SMF checks with local resources and finds that its own SMF has extra session resources. It returns Nsmf_ResourceCheck Response (resource check response) with the status of each resource (user, session, QosFlow);

When the user resources of I/V-SMF are more than those of PSA-SMF, the redundant resources can be recycled to keep them consistent. FIG13 is a flowchart 1 of user redundant resource recycling according to an embodiment of the present disclosure, as shown in FIG13 , including:

1. I/V-SMF sends Nsmf_ResourceCheck Request (resource check request) to PSA-SMF, including: Supi, Pei, Gpsi, Pdu Session Id list, Qfi list;

2. After receiving the request, PSA-SMF checks with local resources and finds that it lacks the user resources. It returns Nsmf_ResourceCheck Response (resource check response) with the abnormal status of the user resources.

Based on the resource status in the response message, I/V-SMF determines that PSA-SMF lacks the user resources, and I/V-SMF starts to initiate a release process to release all session resources under the redundant users. The process of releasing each session is as follows.

3a, I/V-SMF sends N4 Session Release Request to I/V-UPF;

3b, I/V-SMF receives the N4 Session Release response returned by I/V-UPF;

5. AMF sends N2 Session Release Request to (R)AN to release session resources.

6. (R)AN sends an AN-specific resource modification message to the UE to release session resources.

7. (R)AN replies N2 Session Release Ack to AMF;

8a, AMF transmits N2 PDU Session Resource Release Response Transfer to I/V-SMF through Nsmf_PDU Session_UpdateSMContext Request (session update request);

9. UE returns PDU session Release Accept to (R)AN;

12. I/V-SMF sends Nsmf_PDUSession_SMContextStatus Notify (session context status) to AMF Notification) to release the AMF session resources;

13. I/V-SMF releases its own session resources.

When the user resources of the I/V-SMF are less than those of the PSA-SMF, the redundant resources can be recycled to keep them consistent. FIG14 is a second flowchart of user redundant resource recycling according to an embodiment of the present disclosure, as shown in FIG14 , including:

1. PSA-SMF periodically triggers Nsmf_ResourceCheck Request (resource check request) to PSA-SMF, including Supi, Pei, Gpsi, Pdu Session Id list, and Qfi list;

2. After receiving the request, I/V-SMF checks with local resources and finds that its own SMF lacks the user resource. It returns Nsmf_ResourceCheck Response (resource check response) with the abnormal status of the user resource.

After receiving the response, PSA-SMF finds that I/V-SMF lacks the user resources and starts to initiate a release process to release all session resources under the redundant users. The process of releasing each session is as follows.

3. PSA-SMF sends a release request to H-UPF and receives a response;

Through this embodiment, the redundant resources of I/V-SMF and PSA-SMF can be recovered to keep them consistent. Redundant resources are recovered to save memory space and improve performance; each user will be checked once, and the check is complete without omission; problems can be found and solved before the normal process goes wrong, and users are not aware of it, which improves user experience.

The embodiment of the present disclosure further provides a redundant resource recovery processing device. FIG15 is a block diagram of the redundant resource recovery processing device according to the embodiment of the present disclosure. As shown in FIG15 , the device is applied to the network side, and the device includes:

The first transmission module 152 is used to transmit an interface request message between the sending end SMF and the receiving end SMF, wherein the interface message carries a resource identifier;

The second transmission module 154 is used to transmit the interface response message after the resource verification corresponding to the resource identifier between the sending end SMF and the receiving end SMF, wherein the interface response message carries the resource status;

A determination module 156, configured to determine redundant resources based on the resource status through the transmitting end SMF or the receiving end SMF;

The recycling processing module 158 is used to recycle the redundant resources through the sending end SMF or the receiving end SMF.

In one embodiment, the first transmission module 152 is further used to send an interface request message for verifying resources to the receiving-end SMF through the sending-end SMF; or to receive an interface request message sent by the receiving-end SMF through the sending-end SMF.

In one embodiment, the second transmission module 154 includes:

A first verification submodule is used for, when an interface request message for verifying resources is sent to the receiving-end SMF through the sending-end SMF, verifying the resources corresponding to the resource identifier through the receiving-end SMF, and receiving through the sending-end SMF the interface response message sent by the receiving-end SMF after verifying the resources corresponding to the resource identifier;

The second verification submodule is used to verify the resource corresponding to the resource identifier through the sending end SMF when the interface request message sent by the receiving end SMF is received through the sending end SMF, and then send the resource identifier to the receiving end SMF. The interface response message is sent.

In one embodiment, the first verification submodule is also used for the resource identifier including a user identifier, a session identifier, and a QoS Flow identifier corresponding to the session identifier; through the receiving end SMF, determining whether the receiving end SMF has the user identifier of the sending end SMF carried in the interface request message; when the determination result is that the user identifier does not exist, determining that the verification result is that the user resources of the receiving end SMF are less than the user resources of the sending end SMF, and the resource status is that the user identifier does not exist; when the determination result is that the user identifier exists, determining through the receiving end SMF whether the receiving end SMF has the session identifier of the sending end SMF carried in the interface request message; when the determination result is that the session identifier does not exist, determining that the verification result is that the session resources of the receiving end SMF are less than the session resources of the sending end SMF, and the resource status is that the session identifier does not exist; when the determination result is that the session identifier exists, judging that the receiving end SMF Whether there are redundant session resources in the session resources of the receiving-end SMF; if there are redundant session resources, determine that the session resources of the receiving-end SMF are more than the session resources of the sending-end SMF, and determine that the resource status is that the session identifier exists; if there are no redundant session resources, determine through the receiving-end SMF whether the receiving-end SMF has the QoS Flow identifier of the sending-end SMF carried in the interface request message; when the determination result is that the QoS Flow identifier does not exist, determine that the verification result is that the QoS Flow resources of the receiving-end SMF are less than the QoS Flow resources of the sending-end SMF, and the resource status is that the QoS Flow identifier does not exist; when the determination result is that the QoS Flow identifier exists, determine that the verification result is that the QoS Flow resources of the receiving-end SMF are greater than or equal to the QoS Flow resources of the sending-end SMF, and the resource status is that the QoS Flow identifier exists.

In one embodiment, the second verification submodule is also used for the resource identifier including a user identifier, a session identifier, and a QoS Flow identifier corresponding to the session identifier; through the sending end SMF, determining whether the sending end SMF has the user identifier of the receiving end SMF carried in the interface request message; when the determination result is that the user identifier does not exist, determining the verification result is that the user resources of the sending end SMF are less than the user resources of the receiving end SMF, and the resource status is that the user identifier does not exist; when the determination result is that the user identifier exists, determining through the sending end SMF whether the sending end SMF has the session identifier of the receiving end SMF carried in the interface request message; when the determination result is that the session identifier does not exist, determining the verification result is that the session resources of the sending end SMF are less than the session resources of the receiving end SMF, and the resource status is that the session identifier does not exist; when the determination result is that the session identifier exists, judging the sending end SMF. Whether there are redundant session resources in the session resources of the sending-end SMF, if there are redundant session resources, determine that the session resources of the sending-end SMF are more than the session resources of the receiving-end SMF, and determine that the resource status is that the session identifier exists; if there are no redundant session resources, determine through the sending-end SMF whether the sending-end SMF has the QoS Flow identifier of the receiving-end SMF carried in the interface request message; when the determination result is that the QoS Flow identifier does not exist, determine that the verification result is that the QoS Flow resources of the sending-end SMF are less than the QoS Flow resources of the receiving-end SMF, and the resource status is that the QoS Flow identifier does not exist; when the determination result is that the QoS Flow identifier exists, determine that the verification result is that the QoS Flow resources of the sending-end SMF are greater than or equal to the QoS Flow resources of the receiving-end SMF, and the resource status is that the QoS Flow identifier exists.

In one embodiment, the determination module 156 is further used to determine, through the sending end SMF, based on the resource status, when the user resources of the receiving end SMF are less than the user resources of the sending end SMF, that the user resources that do not exist in the receiving end SMF are the redundant resources; and, through the sending end SMF, based on the resource status, when the QoS Flow resources of the receiving end SMF are less than the QoS Flow resources of the sending end SMF. The session resources that do not exist in the SMF are the redundant resources; when the QoS Flow resources of the receiving-end SMF are less than the QoS Flow resources of the sending-end SMF, the sending-end SMF determines, based on the resource status, that the QoS Flow resources that do not exist in the receiving-end SMF are the redundant resources; when the user resources of the sending-end SMF are less than the user resources of the receiving-end SMF, the receiving-end SMF determines, based on the resource status, that the user resources that do not exist in the sending-end SMF are the redundant resources; when the QoS Flow resources of the sending-end SMF are less than the QoS Flow resources of the receiving-end SMF, the receiving-end SMF determines, based on the resource status, that the session resources that do not exist in the sending-end SMF are the redundant resources; when the QoS Flow resources of the sending-end SMF are less than the QoS Flow resources of the receiving-end SMF, the receiving-end SMF determines, based on the resource status, that the QoS Flow resources that do not exist in the sending-end SMF are the redundant resources.

In one embodiment, the recycling processing module 158 is also used to, when the resources of the sending end SMF are more than the resources of the receiving end SMF, send an N1N2 message to the AMF through the sending end SMF, so as to enable the base station and the UE to release the redundant resources through the AMF, receive a response message returned by the AMF after the base station and the UE release the redundant resources, and release the redundant resources in the sending end SMF; or when the resources of the sending end SMF are less than the resources of the receiving end SMF, send a release request message for releasing the redundant resources to the H-UPF and PCF through the receiving end SMF, receive a release response message sent by the H-UPF and the PCF after releasing the redundant resources, and release the redundant resources in the receiving end SMF.

An embodiment of the present disclosure further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

In an exemplary embodiment, the above-mentioned computer-readable storage medium may include, but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store computer programs.

An embodiment of the present disclosure further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

In an exemplary embodiment, the electronic device may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.

For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

Obviously, those skilled in the art should understand that the above modules or steps of the present disclosure can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present disclosure is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

A redundant resource recovery processing method is applied to a network side, and the method comprises:

Transmitting an interface request message between a sending end session management function SMF and a receiving end SMF, wherein the interface message carries a resource identifier;

Transmitting an interface response message after checking the resource corresponding to the resource identifier between the sending end SMF and the receiving end SMF, wherein the interface response message carries the resource status;

Determining redundant resources based on the resource status by the transmitting end SMF or the receiving end SMF;

The redundant resources are recycled through the sending-end SMF or the receiving-end SMF.
The method according to claim 1, wherein transmitting an interface request message between a transmitting end SMF and a receiving end SMF comprises:

Sending an interface request message for verifying resources to the receiving end SMF through the sending end SMF; or

The interface request message sent by the receiving-end SMF is received through the sending-end SMF.
The method according to claim 2, wherein the interface response message after the resource verification corresponding to the resource identifier is transmitted between the sending end SMF and the receiving end SMF comprises:

In the case where an interface request message for verifying resources is sent to the receiving-end SMF through the sending-end SMF, the resource corresponding to the resource identifier is verified through the receiving-end SMF, and the interface response message sent by the receiving-end SMF after verifying the resource corresponding to the resource identifier is received through the sending-end SMF;

In the case where the interface request message sent by the receiving-end SMF is received by the sending-end SMF, the resource corresponding to the resource identifier is verified by the sending-end SMF, and then the interface response message is sent to the receiving-end SMF.
The method according to claim 3, wherein verifying the resource corresponding to the resource identifier by the receiving end SMF comprises:

The resource identifier includes a user identifier, a session identifier, and a QoS Flow identifier corresponding to the session identifier;

Determine, through the receiving end SMF, whether the receiving end SMF has the user identifier of the sending end SMF carried in the interface request message;

In the case where the determination result is that the user identifier does not exist, determining that the verification result is that the user resources of the receiving end SMF are less than the user resources of the sending end SMF, and the resource status is that the user identifier does not exist;

If the determination result is that the user identifier exists, determining, through the receiving end SMF, whether the receiving end SMF has the session identifier of the sending end SMF carried in the interface request message;

In the case where the determination result is that the session identifier does not exist, the verification result is determined to be that the session resources of the receiving end SMF are less than the session resources of the sending end SMF, and the resource status is that the session identifier does not exist;

In the case where the determination result is that the session identifier exists, determine whether the session resources of the receiving-end SMF have redundant session resources; if there are redundant session resources, determine the verification result to be that the session resources of the receiving-end SMF are more than the session resources of the sending-end SMF, and determine that the resource status is that the session identifier exists; if there are no redundant session resources, determine, through the receiving-end SMF, whether the receiving-end SMF has the QoS Flow identifier of the sending-end SMF carried in the interface request message;

In the case where the determination result is that the QoS Flow identifier does not exist, the verification result is determined to be that the QoS Flow resources of the receiving end SMF are less than the QoS Flow resources of the sending end SMF, and the resource state is that the QoS Flow identifier does not exist. exist;

When the determination result is that the QoS Flow identifier exists, the verification result is determined that the QoS Flow resources of the receiving end SMF are greater than or equal to the QoS Flow resources of the sending end SMF, and the resource status is that the QoS Flow identifier exists.
The method according to claim 3, wherein verifying the resource corresponding to the resource identifier by the sending end SMF comprises:

The resource identifier includes a user identifier, a session identifier, and a QoS Flow identifier corresponding to the session identifier;

Determine, by the sending end SMF, whether the sending end SMF has the user identifier of the receiving end SMF carried in the interface request message;

In the case where the determination result is that the user identifier does not exist, determining that the verification result is that the user resources of the sending end SMF are less than the user resources of the receiving end SMF, and the resource status is that the user identifier does not exist;

If the determination result is that the user identifier exists, determining, through the sending end SMF, whether the sending end SMF has the session identifier of the receiving end SMF carried in the interface request message;

In the case where the determination result is that the session identifier does not exist, the verification result is determined to be that the session resources of the sending end SMF are less than the session resources of the receiving end SMF, and the resource status is that the session identifier does not exist;

In the case where the determination result is that the session identifier exists, determine whether the session resources of the sending end SMF have redundant session resources; if there are redundant session resources, determine the verification result to be that the session resources of the sending end SMF are more than the session resources of the receiving end SMF, and determine that the resource status is that the session identifier exists; if there are no redundant session resources, determine through the sending end SMF whether the sending end SMF has the QoS Flow identifier of the receiving end SMF carried in the interface request message;

In the case where the determination result is that the QoS Flow identifier does not exist, the verification result is determined to be that the QoS Flow resources of the sending end SMF are less than the QoS Flow resources of the receiving end SMF, and the resource state is that the QoS Flow identifier does not exist;

When the determination result is that the QoS Flow identifier exists, the verification result is determined that the QoS Flow resources of the sending end SMF are greater than or equal to the QoS Flow resources of the receiving end SMF, and the resource status is that the QoS Flow identifier exists.
The method according to claim 4 or 5, wherein determining, by the transmitting end SMF or the receiving end SMF, redundant resources based on the resource status comprises:

In a case where the user resources of the receiving-end SMF are less than the user resources of the sending-end SMF, determining, by the sending-end SMF, based on the resource status, that the user resources not existing in the receiving-end SMF are the redundant resources;

In the case where the QoS Flow resources of the receiving-end SMF are less than the QoS Flow resources of the sending-end SMF, the sending-end SMF determines, based on the resource status, that the session resources that do not exist in the receiving-end SMF are the redundant resources;

In the case that the QoS Flow resources of the receiving-end SMF are less than the QoS Flow resources of the sending-end SMF, the sending-end SMF determines, based on the resource status, that the QoS Flow resources not existing in the receiving-end SMF are the redundant resources;

In a case where the user resources of the transmitting end SMF are less than the user resources of the receiving end SMF, determining, by the receiving end SMF, based on the resource status, that the user resources not existing in the transmitting end SMF are the redundant resources;

In the case where the QoS Flow resources of the transmitting SMF are less than the QoS Flow resources of the receiving SMF, Through the receiving-end SMF, determining, based on the resource status, that a session resource not existing in the sending-end SMF is the redundant resource;

In the case that the QoS Flow resources of the sending-end SMF are less than the QoS Flow resources of the receiving-end SMF, the receiving-end SMF determines, based on the resource status, that the QoS Flow resources that do not exist in the sending-end SMF are the redundant resources.
The method according to claim 4 or 5, wherein the recycling of the redundant resources by the transmitting end SMF or the receiving end SMF comprises:

In the case where the resources of the transmitting end SMF are more than the resources of the receiving end SMF, an N1N2 message is sent to the AMF through the transmitting end SMF, so that the base station and the UE release the redundant resources through the AMF, a response message returned by the AMF after the base station and the UE release the redundant resources is received, and the redundant resources are released in the transmitting end SMF; or

In the case where the resources of the sending-end SMF are less than the resources of the receiving-end SMF, a release request message for releasing the redundant resources is sent to the H-UPF and PCF through the receiving-end SMF, and a release response message is received after the H-UPF and the PCF release the redundant resources, and the redundant resources are released in the receiving-end SMF.
A redundant resource recovery processing device, applied to a network side, comprising:

A first transmission module, used for transmitting an interface request message between a sending end session management function SMF and a receiving end SMF, wherein the interface message carries a resource identifier;

A second transmission module is used to transmit an interface response message after checking the resource corresponding to the resource identifier between the sending end SMF and the receiving end SMF, wherein the interface response message carries a resource status;

A determination module, configured to determine redundant resources based on the resource status through the transmitting end SMF or the receiving end SMF;

The recycling processing module is used to recycle the redundant resources through the sending end SMF or the receiving end SMF.
A computer-readable storage medium having a computer program stored therein, wherein the computer program is configured to execute the method described in any one of claims 1 to 7 when run.
An electronic device comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the method described in any one of claims 1 to 7.