CN115955686A - Session disaster tolerance method, device and storage medium - Google Patents

Session disaster tolerance method, device and storage medium Download PDF

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Publication number
CN115955686A
CN115955686A CN202111178282.0A CN202111178282A CN115955686A CN 115955686 A CN115955686 A CN 115955686A CN 202111178282 A CN202111178282 A CN 202111178282A CN 115955686 A CN115955686 A CN 115955686A
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network element
sgw
session
cluster
sgw network
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过增斌
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2022/117186 priority patent/WO2023056813A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure

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Abstract

The embodiment of the invention provides a conversation disaster recovery method, equipment and a storage medium, belonging to the technical field of communication. The method comprises the following steps: receiving a first session establishment request sent by an MME (mobility management entity) network element, and establishing a first communication link between a UPF (uplink packet flow) network element and an SGW (serving gateway) network element cluster, a second communication link between a PGW (packet gateway) network element and the SGW network element cluster and a third communication link between the MME network element and the SGW network element cluster based on the first session establishment request; when a primary SGW network element in the SGW network cluster is broken, session data of the primary SGW network element is obtained, session processing is carried out on the basis that session data of a takeover SGW network element and the primary SGW network element take over a session of the primary SGW network element, and the takeover SGW network element is selected from standby SGW network elements of the SGW network cluster. The technical scheme of the embodiment of the invention can avoid the situation of telephone traffic interruption of the user in the disaster recovery process and improve the user experience.

Description

Session disaster tolerance method, device and storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a device, and a storage medium for session disaster recovery.
Background
With the advent of the 5G era, transmission rates are greatly increased, and in order to prevent problems of unsmooth communication, data loss, capital loss, even life hazards, and the like caused by network service interruption due to various reasons such as equipment failure, power outage, natural disasters, and the like, a core network provides a disaster recovery scheme, and a cross-region disaster recovery deployment mode is generally adopted, that is, two DCs are deployed in two different regions, respectively, and when a network device in a DC in one region is unavailable, the DC in the other region takes over services quickly, so that the availability of the services is ensured. However, in this disaster recovery deployment mode, the user plane tunnel is released and re-established before and after the disaster recovery, which causes the interruption of the telephone traffic of the user during the disaster recovery process, and cannot provide uninterrupted telecommunication service for the user.
Disclosure of Invention
The embodiments of the present invention mainly aim to provide a session disaster recovery method, a device and a storage medium, and are intended to solve the problem.
In a first aspect, an embodiment of the present invention provides a session disaster recovery method, including:
receiving a first session establishment request sent by an MME network element, and establishing a first communication link between a UPF network element and an SGW network element cluster, a second communication link between a PGW network element and the SGW network element cluster, and a third communication link between the MME network element and the SGW network element cluster based on the first session establishment request;
when a main SGW network element in the SGW network element cluster is broken, session data of the main SGW network element is obtained, and session processing is performed based on the session data of a takeover SGW network element and the main SGW network element for taking over the session of the main SGW network element, wherein the takeover SGW network element is selected from standby SGW network elements of the SGW network element cluster.
In a second aspect, an embodiment of the present invention further provides an apparatus, where the apparatus includes a processor, a memory, a computer program stored on the memory and executable by the processor, and a data bus for implementing connection communication between the processor and the memory, where the computer program, when executed by the processor, implements the steps of any one of the session disaster recovery methods provided in the present specification.
In a third aspect, an embodiment of the present invention further provides a storage medium for a computer-readable storage, where the storage medium stores one or more programs, and the one or more programs are executable by one or more processors to implement the steps of any one of the session disaster recovery methods provided in the present specification.
The embodiment of the invention provides a session disaster recovery method, equipment and a storage medium, wherein an SGW (gateway) network element cluster is constructed, a first communication link between the SGW network element cluster and a UPF (unified power flow) network element, a second communication link between the SGW network element cluster and the UPF network element and a third communication link between the SGW network element cluster and an MME (mobility management entity) network element are established, so that when a main SGW network element in the SGW network element cluster is broken and takes over a session of the main SGW network element, only a communication link of a control plane needs to be updated without reconstructing a user plane tunnel, the situation that telephone traffic of a user is interrupted in the disaster recovery process is avoided, and the user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic architecture diagram of a control plane and user plane separation architecture according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a networking architecture according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a session disaster recovery method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of signaling interaction during initial attachment of a user according to an embodiment of the present invention;
fig. 5 is a schematic signaling interaction diagram illustrating that a user side triggers a tracking area update when a primary SGW network element is broken;
fig. 6 is a schematic diagram of signaling interaction for triggering bearer update by a network side when a primary SGW network element is broken;
fig. 7 is a block diagram schematically illustrating a structure of an apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The embodiment of the invention provides a session disaster recovery method, a device and a storage medium. The session disaster recovery method can be applied to the CU separation architecture to solve the problem of user telephone traffic interruption caused when the main SGW network element triggers the main/standby switching when the chain breaking condition occurs in the CU separation architecture.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
As shown in fig. 1, the architecture diagram is an architecture diagram of a control plane and user plane separated architecture. The architecture includes an MME network element (Mobility Management Entity), an SGW network element (Serving Gateway Control plane function), a PGW network element (PDN Gateway Control plane function), and an UPF network element (Serving Gateway User plane function). The related network elements of the SGW network element are an MME network element, a PGW network element and a UPF network element, and the connection of the control plane is from the MME network element to the SGW network element and then to the PGW network element.
Referring to fig. 2, fig. 2 is a schematic diagram of a networking architecture according to an embodiment of the present invention. The architecture comprises an MME network element, a PGW network element, a UPF network element and a plurality of SGW network elements. The SGW network element cluster comprises a main SGW network element and a standby SGW network element, for example, SGW1 is the main SGW network element, and SGWs 2 to SGWn are all standby SGW network elements.
When a main SGW network element in the SGW network element cluster fails and is broken, a standby SGW network element in the SGW network element cluster can acquire a service context required to be processed, namely session data of the main SGW network element, from a data storage service, and instantaneously take over service processing of the main SGW network element, so that mutual redundancy switching among the SGW network elements in the SGW network element cluster is realized. Therefore, when the SGW network element is taken over to take over the session of the main SGW network element, the UPF network element does not need to release resources, the online service is kept uninterrupted, and the user does not need to reestablish the connection.
In an embodiment, a plurality of SGW network elements may be grouped into a plurality of SGW network element clusters, and each SGW network element cluster includes a main SGW network element and a standby SGW network element. And when the main SGW network element fails and is broken, disaster recovery can be carried out to a standby SGW network element in the same SGW network element cluster as the main SGW network element.
In addition, the SGW network element and the PGW network element may also be deployed in a physical combination to obtain a network element set, and the connection of the control plane is from the MME network element to the network element set. At this time, signaling interaction between the PGW network element and the SGW network element is signaling interaction inside the network element set, the PGW network element in the network element set also needs to support the PGW network element cluster to perform disaster recovery, and when signaling interaction is performed, related information of the PGW network element cluster needs to be transferred to the MME network element by the SGW network element.
Referring to fig. 3, fig. 3 is a flowchart illustrating a session disaster recovery method according to an embodiment of the present invention.
As shown in fig. 3, the session disaster recovery method includes step S101.
Step S101, receiving a first session establishment request sent by an MME network element, and establishing a first communication link between a UPF network element and an SGW network element cluster, a second communication link between a PGW network element and the SGW network element cluster, and a third communication link between the MME network element and the SGW network element cluster based on the first session establishment request; when a main SGW network element in the SGW network element cluster is broken, session data of the main SGW network element is obtained, session processing is carried out on the basis that the session data of the main SGW network element and the session data of the main SGW network element are taken over to take over the session of the main SGW network element, and the taken-over SGW network element is selected from standby SGW network elements of the SGW network element cluster.
Based on the networking architecture shown in fig. 2, when a user is initially attached, the SGW network element cluster receives a first session establishment request sent by the MME network element, and establishes a first communication link with the UPF network element, a second communication link with the PGW network element, and a third communication link with the MME network element, respectively. The first communication link is used for transmitting control plane information and performing signaling interaction of a control plane.
In one embodiment, the step of establishing three communication links may include: initiating a second session establishment request to the UPF network element based on the first session establishment request, so that the UPF network element establishes a first communication link with a main SGW network element in the SGW network element cluster based on the second session establishment request; sending a third session establishment request to the PGW network element, so that the PGW network element establishes a second communication link with a main SGW network element in the SGW network element cluster based on the third session establishment request, wherein the third session establishment request carries a cluster identifier of the SGW network element cluster and an address list of a standby SGW network element in the SGW network element cluster; and sending a first session establishment response to the MME network element, establishing a third communication link between the MME network element and a main SGW network element in the SGW network element cluster, wherein the session establishment response carries a cluster identifier of the SGW network element cluster and an address list of a standby SGW network element in the SGW network element cluster.
Fig. 4 is a schematic diagram of signaling interaction during initial attachment of a user according to an embodiment of the present invention.
201. And the MME network element receives an initial attachment request initiated by the UE side.
202. And the MME network element initiates a first session establishment request to a main SGW network element in the SGW network element cluster, and informs the main SGW network element to establish communication links with the UPF network element and the PGW network element respectively so as to facilitate the interaction of control plane signaling.
203. And a main SGW network element in the SGW network element cluster initiates a second session establishment request to the UPF network element, so that the UPF network element can establish a first communication link with the main SGW network element, wherein the first communication link is used for carrying out control plane signaling interaction.
204. And the UPF network element sends a second session establishment response to the main SGW network element in the SGW network cluster to indicate that the establishment of the first communication link between the UPF network element and the main SGW network element is completed.
205. And initiating a third session establishment request to the PGW network element by a main SGW network element in the SGW network element cluster, wherein the third session establishment request carries the cluster identifier of the SGW network element cluster and/or a standby SGW address list in the SGW network element cluster.
The cluster identifier of the SGW network element cluster is a cluster ID of the SGW network element cluster in which the primary SGW network element is located, and the standby SGW network element address list in the SGW network element cluster may include all the addresses of the standby SGW network elements or only include some of the addresses of the standby SGW network elements in the SGW network element cluster.
And sending the cluster ID of the SGW network element cluster in which the main SGW network element is located and/or a standby SGW address list in the SGW network element cluster to the PGW network element, so that the PGW network element can quickly determine to take over the SGW network element in the SGW network element cluster when the main SGW is broken and a network side triggers load updating.
206. And the PGW network element sends a third session establishment response to the main SGW network element in the SGW network element cluster to indicate that the establishment of the second communication link between the PGW network element and the main SGW network element is completed.
207. And a main SGW network element in the SGW network element cluster initiates a session updating request to the UPF network element to update the F-TEIDU on the PGW side.
208. And the UPF network element sends a session update response to the main SGW network element in the SGW network element cluster.
209. And the main SGW network element in the SGW network element cluster sends a first session establishment response to the MME network element, and the first session establishment response carries a cluster identifier of the SGW network element cluster and/or a standby SGW address list in the SGW network element cluster.
The cluster identifier of the SGW network element cluster is a cluster ID of the SGW network element cluster in which the main SGW network element is located, and the list of the addresses of the standby SGW network elements in the SGW network element cluster may include all the addresses of the standby SGW network elements or only a part of the addresses of the standby SGW network elements in the SGW network element cluster.
And sending the cluster ID of the SGW network element cluster in which the main SGW network element is located and/or a standby SGW address list in the SGW network element cluster to the MME network element, so that the MME network element can break a chain in the main SGW and quickly determine to take over the SGW network element in the SGW network element cluster when a user side triggers the updating of a tracking area.
210. And the MME network element informs the UE side, continues the subsequent attachment process, allocates air interface resources and gets through the wireless downlink tunnel.
After all three communication links are established, the main SGW network element can normally perform traffic processing. In the traffic processing process, the SGW network element cluster appears to be an SGW network element in the associated network elements MME network element, PGW network element and UPF network element. From the perspective of the user plane, when the UPF network element finds that the main SGW connected in the SGW network element cluster has a fault, the UPF network element may connect the standby SGW network element in the SGW network element cluster to continue working without releasing the resource of the UPF network element, and meanwhile, the MME network element or the PGW network element detects the main SGW fault and does not release the user on the SGW network element, so that the packet of the user plane is not interrupted.
From the perspective of the associated network element, as long as the associated network element can obtain the standby information of the SGW network element, after the main SGW network element is broken, the associated network element can trigger the standby SGW network element to take over the user plane resource of the original main SGW network element in the shortest time, thereby ensuring that the telephone traffic of the user is not interrupted in the disaster recovery process.
When the MME network element receives a tracking area updating request triggered by a user side and finds that the main SGW network element is broken, the MME network element selects a take-over SGW network element from standby SGW network elements in an SGW network element cluster, the take-over SGW network element acquires session data of the main SGW network element, and takes over the session of the main SGW network element to ensure normal operation of user telephone traffic.
In a specific implementation process, when the MME network element selects to take over the SGW network element from the standby SGW network elements in the SGW network element cluster, the MME network element may select according to the order, weight, or state of the standby SGW network elements in the SGW network element cluster.
In an embodiment, the step of taking over the session of the active SGW network element may include: receiving a first session request sent by the MME network element, initiating a first session update request to the PGW network element, enabling the PGW network element to update the second communication link based on the first session update request, and enabling the UPF network element to update the first communication link based on a first session update response returned by the PGW network element and a session tunnel identifier corresponding to a takeover SGW network element; and sending a first session response to the MME network element, and establishing a third communication link between the MME network element and the takeover SGW network element to enable the takeover SGW network element to take over the session of the main SGW network element based on the session data.
As shown in fig. 5, a signaling interaction diagram that a user side triggers a tracking area update when a primary SGW network element is broken link according to an embodiment of the present invention is shown.
301. And the MME network element receives a tracking area updating request initiated by a user side.
302. And the MME network element finds out the chain breakage of the main SGW network element, selects a takeover SGW network element which can be taken over from the SGW network element cluster, and sends a first session request to the takeover SGW network element.
The state detection mechanism between the MME network element and the SGW network element may be used to detect the state of the main SGW network element, for example, the detection mechanism may be heartbeat detection.
Because the cluster identifier of the SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster have been sent to the MME network element in the user attachment phase, when the active SGW network element is found to be broken, the MME network element can directly select the takeover SGW network element from the standby SGW network elements in the SGW network element cluster.
303. And after receiving the first session request, the takeover SGW network element acquires the session data of the main SGW network element, and initiates a first session update request to the PGW network element according to the acquired session data of the main SGW network element.
In an embodiment, the first session update request may carry a cluster identifier of the SGW network element cluster and/or a standby SGW address list in the SGW network element cluster.
Since the cluster identifier of the SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster have been sent to the PGW network element in the user attach phase, if the address of the standby SGW network element and the cluster identifier of the SGW network element cluster change, the cluster identifier of the new SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster may be sent to the PGW network element by using the first session update request, so as to update the initial data.
304. And the PGW network element sends a first session update response to the takeover SGW network element to indicate that the second communication link is updated, and at the moment, the PGW network element and the takeover SGW network element perform signaling interaction.
In addition, the UPF network element further needs to update the first communication link according to the session tunnel identifier corresponding to the takeover SGW network element, that is, the UPF network element performs signaling interaction of the control plane with the takeover SGW network element through the updated first communication link.
In an embodiment, if the takeover SGW network element does not notify the UPF network element of the session tunnel identifier, the takeover SGW network element may initiate a second session update request to the UPF network element and receive a second session update response returned by the UPF network element. And the second session updating request carries a session tunnel identifier corresponding to the SGW network element. And the session tunnel identifier corresponding to the SGW network element is taken over is F-SEID (full Qualified SEID).
305. And the takeover SGW network element sends a first session response to the MME network element, which indicates that the first communication link between the MME network element and the takeover SGW network element is established, and the MME network element can perform signaling interaction with the takeover SGW network element through the first communication link.
In an embodiment, the first session response may carry a cluster identifier of the SGW network element cluster and/or a list of standby SGW addresses in the SGW network element cluster.
Since the cluster identifier of the SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster have been already sent to the MME network element in the user attach phase, if the address of the standby SGW network element and the cluster identifier of the SGW network element cluster change, the cluster identifier of the new SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster can be sent to the MME network element by using the first session response to update the initial data.
306. And the MME network element continuously initiates a tracking area updating request to the SGW network element. Additionally, in some embodiments, the tracking area update request may also be retransmitted by the user side.
When the PGW network element receives the bearer update triggered by the network side and finds that the main SGW network element is broken, the PGW network element selects a take-over SGW network element from the standby SGW network elements in the SGW network element cluster, the take-over SGW network element acquires the session data of the main SGW network element, and the session of the main SGW network element is taken over, so that the normal operation of user telephone traffic is ensured.
In a specific implementation process, when the PGW network element selects to take over the SGW network element from the standby SGW network elements in the SGW network element cluster, the PGW network element may select according to the order, weight, or state of the standby SGW network elements in the SGW network element cluster.
In an embodiment, the taking over of the session of the primary SGW network element based on the session data of the taking over SGW network element and the primary SGW network element includes: receiving a first bearer update request sent by the PGW network element and sending a second bearer update request to the MME network element, so that the MME network element triggers a second session request based on the second bearer request; sending a third session update request to the PGW network element based on the second session request to update a second communication link between the PGW network element and the takeover SGW network element; receiving a third session update response returned by the PGW network element based on the third session update request, so that the UPF network element updates the first communication link between the UPF network element and the takeover SGW network element based on the third session update response and the session tunnel identifier corresponding to the takeover SGW network element; and sending a second bearer establishment response to the MME network element to update a third communication link between the MME network element and the takeover SGW network element.
As shown in fig. 6, a schematic diagram of signaling interaction for triggering bearer update by a network side when a primary SGW network element provided in the embodiment of the present invention is broken.
401. And the PGW network element receives the load update triggered by the network side, finds out the broken link of the main SGW network element, and selects the takeover SGW network element which can be taken over from the SGW network element cluster.
The state detection mechanism between the PGW network element and the SGW network element may be used to detect the state of the main SGW network element, for example, the detection mechanism may be heartbeat detection.
Because the cluster identifier of the SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster have been sent to the PGW network element in the user attachment phase, when the active SGW network element is found to be broken, the PGW network element can directly select the takeover SGW network element from the standby SGW network elements in the SGW network element cluster.
402. And the PGW network element sends a first bearer update request to the takeover SGW network element.
403. And after receiving the first bearer update request, the takeover SGW network element acquires the session data of the main SGW network element, and continuously sends a second bearer update request to the MME network element according to the acquired session data of the main SGW network element.
404. And after receiving the second bearer updating request, the MME network element judges that the address of the takeover SGW network element is inconsistent with the address of the main SGW network element, retriggers the session establishment and initiates a second session request to the takeover SGW network element.
405. And after receiving the second session request, the takeover SGW network element initiates a third session update request to the PGW network element.
In an embodiment, the third session update request may carry a cluster identifier of the SGW network element cluster and/or a standby SGW address list in the SGW network element cluster.
Since the cluster identifier of the SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster have been already sent to the PGW network element in the user attachment phase, if the address of the standby SGW network element and the cluster identifier of the SGW network element cluster change, a new cluster identifier of the SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster can be sent to the PGW network element by using a third session update request, so as to update the initial data.
406. After receiving the third session update request again, the PGW network element finds a flow conflict, preferentially executes the third session update request to update the second communication link between the PGW network element and the takeover SGW network element, and sends a third session update response to the takeover SGW network element.
In addition, the UPF network element further needs to update the first communication link between the UPF network element and the SGW network element according to the session tunnel identifier corresponding to the SGW network element, that is, the UPF network element performs signaling interaction of the control plane with the SGW network element through the updated first communication link.
In an embodiment, if the takeover SGW network element does not notify the UPF network element of the session tunnel identifier, the takeover SGW network element may initiate a fourth session update request to the UPF network element, and receive a fourth session update response returned by the UPF network element. And the fourth session update request carries a session tunnel identifier corresponding to the takeover SGW network element. And the session tunnel identifier corresponding to the SGW network element is taken over is F-SEID (full Qualified SEID).
407. And the takeover SGW network element sends a second session response to the MME network element, which indicates that the third communication link between the MME network element and the takeover SGW network element is updated, and the MME network element can perform signaling interaction with the takeover SGW network element through the first communication link.
In an embodiment, the second session response may carry a cluster identifier of the SGW network element cluster and/or a standby SGW address list in the SGW network element cluster.
Since the cluster identifier of the SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster have been sent to the MME network element in the user attach phase, if the address of the standby SGW network element and the cluster identifier of the SGW network element cluster change, the new cluster identifier of the SGW network element cluster and/or the list of the standby SGW addresses in the SGW network element cluster may be sent to the MME network element by using the second session response, so as to update the initial data.
408. And the MME network element informs the UE side to continue the subsequent bearer updating process.
In the session disaster recovery method provided in the above embodiment, by constructing the SGW network element cluster and establishing the first communication link between the SGW network element cluster and the UPF network element, the second communication link between the SGW network element cluster and the UPF network element, and the third communication link between the SGW network element cluster and the MME network element, when the primary SGW network element in the SGW network element cluster is broken and takes over the session of the primary SGW network element by the SGW network element, only the communication link of the control plane needs to be updated without reconstructing a user plane tunnel, thereby avoiding a situation that a user telephone traffic is interrupted in a disaster recovery process, and improving user experience.
Referring to fig. 7, fig. 7 is a schematic block diagram of a device according to an embodiment of the present invention.
As shown in fig. 7, the device 500 includes a processor 501 and a memory 502, and the processor 501 and the memory 502 are connected by a bus 503, such as an I2C (Inter-integrated Circuit) bus.
In particular, processor 501 is used to provide computing and control capabilities, supporting the operation of the overall device. The Processor 501 may be a Central Processing Unit (CPU), and the Processor 501 may also be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. Wherein a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Specifically, the Memory 502 may be a Flash chip, a Read-Only Memory (ROM) magnetic disk, an optical disk, a usb disk, or a removable hard disk.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with an embodiment of the present invention and does not constitute a limitation on the devices to which an embodiment of the present invention may be applied, and that a particular server may include more or less components than those shown, or some of the components may be combined, or have a different arrangement of components.
The processor is configured to run a computer program stored in the memory, and when executing the computer program, implement any one of the session disaster recovery methods provided in the embodiments of the present invention.
In an embodiment, the processor is configured to run a computer program stored in the memory and to implement the following steps when executing the computer program:
receiving a first session establishment request sent by an MME network element, and establishing a first communication link between a UPF network element and an SGW network element cluster, a second communication link between a PGW network element and the SGW network element cluster, and a third communication link between the MME network element and the SGW network element cluster based on the first session establishment request;
when a main SGW network element in the SGW network element cluster is broken, session data of the main SGW network element is obtained, and session processing is performed based on the session data of a takeover SGW network element and the main SGW network element for taking over the session of the main SGW network element, wherein the takeover SGW network element is selected from standby SGW network elements of the SGW network element cluster.
In an embodiment, when implementing that the first communication link between the UPF network element and the SGW network element cluster, the second communication link between the PGW network element and the SGW network element cluster, and the third communication link between the MME network element and the SGW network element cluster are established based on the first session establishment request, the processor is configured to implement:
initiating a second session establishment request to a UPF network element based on the first session establishment request, so that the UPF network element establishes a first communication link with a main SGW network element in the SGW network element cluster based on the second session establishment request;
sending a third session establishment request to a PGW network element, so that the PGW network element establishes a second communication link with a primary SGW network element in the SGW network element cluster based on the third session establishment request, where the third session establishment request carries a cluster identifier of the SGW network element cluster and an address list of a standby SGW network element in the SGW network element cluster;
sending a first session establishment response to the MME network element, establishing a third communication link between the MME network element and a main SGW network element in the SGW network element cluster, wherein the session establishment response carries a cluster identifier of the SGW network element cluster and an address list of a standby SGW network element in the SGW network element cluster.
In an embodiment, when the session data based on the takeover SGW network element and the main SGW network element takes over the session of the main SGW network element, the processor is configured to:
receiving a first session request sent by the MME network element, initiating a first session update request to the PGW network element, enabling the PGW network element to update the second communication link based on the first session update request, and enabling the UPF network element to update the first communication link based on a first session update response returned by the PGW network element and a session tunnel identifier corresponding to a takeover SGW network element;
and sending a first session response to the MME network element, and establishing a third communication link between the MME network element and the takeover SGW network element to enable the takeover SGW network element to take over the session of the main SGW network element based on the session data.
In one embodiment, the processor is configured to:
and sending a second session updating request to the UPF network element, wherein the second session updating request carries the session tunnel identifier corresponding to the takeover SGW network element.
In an embodiment, the first session update request carries a cluster identifier of the SGW network element cluster and/or an address list of a standby SGW network element in the SGW network element cluster; and/or
And the first session response carries the cluster identifier of the SGW network element cluster and/or the address list of the standby SGW network elements in the SGW network element cluster.
In an embodiment, when the session data based on the takeover SGW network element and the main SGW network element takes over the session of the main SGW network element, the processor is configured to:
receiving a first bearer update request sent by the PGW network element and sending a second bearer update request to the MME network element, so that the MME network element triggers a second session request based on the second bearer request;
sending a third session update request to the PGW network element based on the second session request to update a second communication link between the PGW network element and a takeover SGW network element;
receiving a third session update response returned by the PGW network element based on the third session update request, so that the UPF network element updates the first communication link between the UPF network element and the takeover SGW network element based on the third session update response and the session tunnel identifier corresponding to the takeover SGW network element;
sending a second session response to the MME network element to update a third communication link between the MME network element and the takeover SGW network element.
In one embodiment, the processor is configured to:
and initiating a fourth session update request to the UPF network element, where the fourth session update request includes the session tunnel identifier of the serving SGW gateway.
In an embodiment, the third session update request carries a cluster identifier of the SGW network element cluster and/or an address list of a standby SGW network element in the SGW network element cluster; and/or
And the second session response carries the cluster identifier of the SGW network element cluster and/or the address list of the standby SGW network element in the SGW network element cluster.
It should be noted that, as will be clearly understood by those skilled in the art, for convenience and brevity of description, the specific working process of the above-described device may refer to the corresponding process in the foregoing embodiment of the session disaster recovery method, and is not described herein again.
Embodiments of the present invention further provide a storage medium for a computer-readable storage, where the storage medium stores one or more programs, and the one or more programs are executable by one or more processors to implement the steps of any one of the session disaster recovery methods provided in the description of the embodiments of the present invention.
The storage medium may be an internal storage unit of the device described in the foregoing embodiment, for example, a hard disk or a memory of the device. The storage medium may also be an external storage device of the device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the device.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, or suitable combinations thereof. In a hardware embodiment, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
It should be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A session disaster recovery method, the method comprising:
receiving a first session establishment request sent by an MME network element, and establishing a first communication link between a UPF network element and an SGW network element cluster, a second communication link between a PGW network element and the SGW network element cluster, and a third communication link between the MME network element and the SGW network element cluster based on the first session establishment request;
when a main SGW network element in the SGW network element cluster is broken, session data of the main SGW network element is obtained, and session processing is performed based on the session data of a takeover SGW network element and the main SGW network element for taking over the session of the main SGW network element, wherein the takeover SGW network element is selected from standby SGW network elements of the SGW network element cluster.
2. The session disaster recovery method according to claim 1, wherein said establishing a first communication link between a UPF network element and a SGW network element cluster, a second communication link between a PGW network element and the SGW network element cluster, and a third communication link between the MME network element and the SGW network element cluster based on the first session establishment request comprises:
initiating a second session establishment request to a UPF network element based on the first session establishment request, so that the UPF network element establishes a first communication link with a main SGW network element in the SGW network element cluster based on the second session establishment request;
sending a third session establishment request to a PGW network element, so that the PGW network element establishes a second communication link with a primary SGW network element in the SGW network element cluster based on the third session establishment request, where the third session establishment request carries a cluster identifier of the SGW network element cluster and an address list of a standby SGW network element in the SGW network element cluster;
sending a first session establishment response to the MME network element, establishing a third communication link between the MME network element and a main SGW network element in the SGW network element cluster, wherein the session establishment response carries a cluster identifier of the SGW network element cluster and an address list of a standby SGW network element in the SGW network element cluster.
3. The session disaster recovery method according to claim 1, wherein the taking over of the session of the primary SGW network element based on the session data of the taking over SGW network element and the primary SGW network element comprises:
receiving a first session request sent by the MME network element, initiating a first session update request to the PGW network element, enabling the PGW network element to update the second communication link based on the first session update request, and enabling the UPF network element to update the first communication link based on a first session update response returned by the PGW network element and a session tunnel identifier corresponding to a takeover SGW network element;
and sending a first session response to the MME network element, and establishing a third communication link between the MME network element and the takeover SGW network element so that the takeover SGW network element takes over the session of the main SGW network element based on the session data.
4. The session disaster recovery method according to claim 3, wherein the method comprises:
and sending a second session updating request to the UPF network element, wherein the second session updating request carries the session tunnel identifier corresponding to the takeover SGW network element.
5. The session disaster recovery method according to claim 4, wherein the first session update request carries a cluster identifier of the SGW network element cluster and/or an address list of a standby SGW network element in the SGW network element cluster; and/or
And the first session response carries the cluster identifier of the SGW network element cluster and/or the address list of the standby SGW network elements in the SGW network element cluster.
6. The session disaster recovery method according to claim 1, wherein the taking over of the session of the primary SGW network element based on the session data of the taking over SGW network element and the primary SGW network element comprises:
receiving a first bearer update request sent by the PGW network element and sending a second bearer update request to the MME network element, so that the MME network element triggers a second session request based on the second bearer request;
sending a third session update request to the PGW network element based on the second session request to update a second communication link between the PGW network element and the takeover SGW network element;
receiving a third session update response returned by the PGW network element based on the third session update request, so that the UPF network element updates the first communication link between the UPF network element and the takeover SGW network element based on the third session update response and the session tunnel identifier corresponding to the takeover SGW network element;
sending a second session response to the MME network element to update a third communication link between the MME network element and the takeover SGW network element.
7. The session disaster recovery method according to claim 6, wherein the method comprises:
and initiating a fourth session update request to the UPF network element, where the fourth session update request includes the session tunnel identifier of the serving SGW gateway.
8. The session disaster recovery method according to claim 1, wherein the third session update request carries a cluster identifier of the SGW network element cluster and/or an address list of a standby SGW network element in the SGW network element cluster; and/or
And the second session response carries the cluster identifier of the SGW network element cluster and/or the address list of the standby SGW network element in the SGW network element cluster.
9. An apparatus, characterized in that the apparatus comprises a processor, a memory, a computer program stored on the memory and executable by the processor, and a data bus for enabling connection communication between the processor and the memory, wherein the computer program, when executed by the processor, implements the steps of the session disaster recovery method according to any of claims 1 to 8.
10. A storage medium for computer-readable storage, characterized in that the storage medium stores one or more programs, which are executable by one or more processors to implement the steps of the conversation disaster recovery method according to any one of claims 1 to 8.
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