CN114500342A - Method, device and system for notifying SMF (simple message format) by 5G UPF (unified power flow) abnormal restart and storage medium - Google Patents
Method, device and system for notifying SMF (simple message format) by 5G UPF (unified power flow) abnormal restart and storage medium Download PDFInfo
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- CN114500342A CN114500342A CN202210130416.XA CN202210130416A CN114500342A CN 114500342 A CN114500342 A CN 114500342A CN 202210130416 A CN202210130416 A CN 202210130416A CN 114500342 A CN114500342 A CN 114500342A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
- G06F11/1438—Restarting or rejuvenating
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
Abstract
The invention discloses a method, a device, a system and a storage medium for notifying SMF (simple message format) of abnormal restart of 5G UPF (unified power flow), and the method comprises the following steps: after the UPF is abnormally restarted successfully, a node establishment request is sent to the SMF according to the configured SMF address; and receiving a node establishment response sent by the SMF, and responding to the heartbeat detection request sent by the SMF after receiving the node establishment feedback. Therefore, the invention can immediately inform the SMF after the 5G UPF is abnormally restarted, so that the SMF can quickly recover the UPF management, and the waste of user resources and the delay of the service flow are avoided.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method, a device, a system and a storage medium for notifying SMF (simple message format) of abnormal restart of 5G UPF.
Background
An n4 interface of a Control plane of the 5g mobile network is based on a udp/ip protocol, and an application layer adopts a packet Forwarding Control protocol (pfcp), which is defined in 3GPP TS 29.244. The n4 interface conveys pfcp request and response messages between smf and upf, including node creation, update, deletion and the like.
As shown in fig. 1, the SMF creates a node establishment by sending an Association setup Request message, and the UPF replies a Response to successfully respond to the establishment Request, so that the node establishment between the SMF and the UPF is successful, and the subsequent requests of the user, such as session establishment, can be continued.
As shown in fig. 2, in a normal situation, the SMF and the UPF detect whether the other side is operating normally or the network is interrupted through heartbeat detection, for example, the heartbeat detection time is 1s once, and if 5 consecutive packets do not respond, the other side device is considered to be abnormal after 5s, and the user resources such as the node and the session between the two devices are released. Therefore, if the UPF device is abnormally restarted, the SMF detects that the UPF is restarted through heartbeat detection, the detection time is 5s as mentioned above, because the UPF runs on the server software of X86, if only the UPF software is abnormally restarted, the time which can normally run after the UPF is restarted to be started successfully is very fast, and the UPF can be normally started and run within 1 second, which causes a time difference between the time when the UPF is restarted and the time when the UPF fault is detected through heartbeat; due to the existence of the time difference, the SMF does not timely release user resources such as nodes and sessions established before the UPF is restarted and initiate subsequent operations such as new node establishment, thereby causing waste of user resources and delay of the service flow.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention aims to: the method for notifying the SMF of the abnormal restart of the 5G UPF can notify the SMF immediately after the abnormal restart of the 5G UPF, so that the SMF can quickly recover the UPF management, and the waste of user resources and the delay of a service flow are avoided.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of 5G UPF exception restart notification SMF, comprising the steps of:
after the UPF is abnormally restarted successfully, a node establishment request is sent to the SMF according to the configured SMF address; and receiving a node establishment response sent by the SMF, and responding to the heartbeat detection request sent by the SMF after receiving the node establishment feedback.
According to a specific implementation manner, in the method for notifying the SMF of the 5G UPF abnormal restart, the node establishment request includes: a node ID, a restart timestamp, a UPF function parameter, and a restart cause value.
Further, in the method for notifying SMF of 5G UPF abnormal restart according to the present invention, the restart cause value adopts a cause value defined in 3GPP TS 29.244 protocol.
In another aspect of the present invention, the present invention further provides a UPF device, comprising:
the node establishment request sending module is used for sending a node establishment request to the SMF according to the configured SMF address after the UPF is abnormally restarted successfully;
a node establishment response receiving module, configured to receive a node establishment response sent by the SMF;
and the heartbeat detection response module is used for responding to the heartbeat detection request sent by the SMF after the node establishment response receiving module receives the node establishment feedback.
According to a specific implementation manner, in the UPF device of the present invention, the node establishment request includes: a node ID, a restart timestamp, a UPF function parameter, and a restart cause value.
Further, in the UPF device of the present invention, the restart cause value adopts a cause value defined in the 3GPP TS 29.244 protocol.
In another aspect of this embodiment, the present invention further provides an interactive system, comprising:
at least one UPF, which is used for sending a node establishment request to the SMF according to the configured SMF address after the abnormal restart is successful; receiving a node establishment response sent by the SMF, and responding to a heartbeat detection request sent by the SMF after receiving the node establishment feedback;
and the SMF is used for receiving a node establishment request sent by the UPF, sending a node establishment response to the UPF, and sending a heartbeat detection request to the UPF after the abnormal restart processing of the UPF.
According to a specific implementation manner, in the interactive system of the present invention, the node establishment request includes: a node ID, a restart timestamp, a UPF function parameter, and a restart cause value.
Further, in the interactive system of the present invention, the restart cause value adopts a cause value defined in a 3GPP TS 29.244 protocol.
In another aspect of this embodiment, the present invention further provides a computer storage medium having stored thereon program instructions for implementing the method of 5G UPF exception restart notification SMF of the present invention when executed.
Compared with the prior art, the invention has the beneficial effects that:
according to the method for notifying the SMF of the 5G UPF abnormal restart, after the UPF abnormal restart is successful, a node establishment request is sent to the SMF according to the configured SMF address; and receiving a node establishment response sent by the SMF, and responding to the heartbeat detection request sent by the SMF after receiving the node establishment feedback. Therefore, the invention can immediately inform the SMF after the 5G UPF is abnormally restarted, so that the SMF can quickly recover the UPF management, and the waste of user resources and the delay of the service flow are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic diagram of the interaction between SMF and UPF to create nodes in an exemplary embodiment of the invention;
FIG. 2 is a schematic diagram of interaction between SMF and UPF for heartbeat detection in accordance with an exemplary embodiment of the present invention;
FIG. 3 is a schematic diagram of an interactive system architecture in accordance with an exemplary embodiment of the present invention;
FIG. 4 is a schematic diagram of data interaction of a 5G UPF abnormal restart notification SMF according to the present invention;
FIG. 5 is a functional module structure diagram of the UPF device of the present invention;
FIG. 6 is a schematic diagram of the interaction between a processor and a computer storage medium in a computer device according to the method 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example 1
FIG. 3 illustrates an interactive system architecture of an exemplary embodiment of the present invention, including: at least one UPF, which is used for sending a node establishment request to the SMF according to the configured SMF address after the abnormal restart is successful; receiving a node establishment response sent by the SMF, and responding to a heartbeat detection request sent by the SMF after receiving the node establishment feedback;
and the SMF is used for receiving a node establishment request sent by the UPF, sending a node establishment response to the UPF, and sending a heartbeat detection request to the UPF after the abnormal restart processing of the UPF.
It can be understood that, in the initial stage of interaction between the UPF and the SMF, the SMF uses a PFCP Association Setup program to set up a PFCP coupling between the SMF entity and the UPF entity, so that the SMF entity obtains corresponding UPF configuration information, the UPF entity obtains configuration information of the SMF entity, and in the subsequent interaction process, the upcp Session is established to use resources of the UPF function, etc. After the initial PFCP coupling is established, the UPF entity can automatically send a node establishment request to the SMF according to the configured SMF address after the abnormal restart is successful; receiving a node establishment response sent by the SMF, and responding to a heartbeat detection request sent by the SMF after receiving the node establishment feedback; the SMF entity can receive a node establishment request sent by a UPF, send a node establishment response to the UPF and send a heartbeat detection request to the UPF after the UPF is abnormally restarted; therefore, in the system, the UDF entity can immediately notify the SMF after the abnormal restart, so that the SMF can quickly recover the UPF management, and the waste of user resources and the delay of the service flow are avoided.
In a possible implementation manner, in the interaction system provided in the embodiment of the present invention, the UDF entity stores first configuration information of an SMF entity corresponding to the UPF entity, for example: area identification of SMF entity which UPF can service; and storing second configuration information such as the interaction mode which can be supported by the corresponding UPF entity or the service which can be provided by the UPF entity in the corresponding SMF entity. Therefore, in the interactive system provided by the embodiment of the present invention, each UDF entity may find a corresponding SMF entity according to the configuration information, and the SMF entity may determine whether the UPF entity satisfies the node response and session conditions based on the configuration information of the UPF entity.
It can be understood that the interaction modes that the UPF entity corresponding to the UPF entity can support are configured in the SMF, where the interaction modes may include a mode that the UPF entity supports interaction through a PTP interface, a mode that the UPF entity supports interaction through an SBI interface, or both the modes. Therefore, the interaction mode which can be supported by the UPF is configured in the SMF, so that the SMF entity can directly know which interface can interact with the UPF entity, and the node response rate of the SMF is effectively improved.
In a possible implementation manner, in the interaction system provided in the embodiment of the present invention, the node establishment request includes: a node ID, a restart timestamp, a UPF function parameter, and a restart cause value.
In general, an associated Node establishment request initiated by the UPF may carry the Node ID (Node ID), Recovery time Stamp (timestamp), UP Function Features (functions supported by the UPF), and other IEs, and may not carry the establishment cause. At this time, the associated node does not know the reason for establishing the connection after responding to the request. Therefore, in this embodiment, by directly configuring the abnormal restart reason in the node establishment request sent by the UPF, the SMF connected to the UPF can directly acquire the corresponding abnormal restart reason from the corresponding node establishment request, so that the SMF can perform corresponding subsequent operations according to the abnormal restart reason.
In a possible implementation manner, in the method for notifying the SMF of the 5G UPF abnormal restart according to the present invention, the restart cause value may be defined by a cause value protocol in a 3G technology or a 4G technology. Preferably, the restart cause value adopts a cause value defined in a 3GPP TS 29.244 protocol, namely, in 3GPP TS 29.244: interface between the Control Plane and the User Plane Nodes IE defines the Cause value in the protocol.
In this embodiment, the UPF abnormal restart cause value is defined by a cause value defined in a 3GPP TS 29.244 protocol, and is defined by a mature technical specification protocol, so that the SMF can further quickly acquire the abnormal restart cause of the UPF.
In this embodiment, a cause value protocol related in 3G or 4G technology is adopted to define a UPF abnormal restart cause value, and a mature cause value definition protocol is used to define the abnormal restart cause value, so that the SMF can further quickly acquire the abnormal restart cause of the UPF.
In a possible implementation manner, after receiving a node establishment request of a UPF entity, an SMF entity obtains abnormal restart information of the UDF through a cause value carried in the node request, and at this time, a subsequent operation for abnormal restart of the UPF is performed, a successful UPF node coupling establishment is replied, and a heartbeat detection flow in a normal communication phase is performed.
In a possible implementation manner, the subsequent operation for abnormal restart of the UPF includes: and deleting the resources established before the restart, and/or initiating subsequent operations such as new node establishment and the like.
Example 2
In another aspect, a method for notifying SMF of 5G UPF abnormal restart is provided, which includes the following steps: after the UPF is abnormally restarted successfully, a node establishment request is sent to the SMF according to the configured SMF address; and receiving a node establishment response sent by the SMF, and responding to the heartbeat detection request sent by the SMF after receiving the node establishment feedback.
In a possible implementation manner, in the method for notifying an SMF of an abnormal restart of a 5G UPF provided in the embodiment of the present invention, the node establishment request includes: a node ID, a restart timestamp, a UPF function parameter, and a restart cause value.
In general, an associated Node establishment request initiated by the UPF may carry the Node ID (Node ID), Recovery time Stamp (timestamp), UP Function Features (functions supported by the UPF), and other IEs, and may not carry the establishment cause. At this time, the associated node does not know the reason for establishing the connection after responding to the request. Therefore, in this embodiment, by directly configuring the abnormal restart reason in the node establishment request sent by the UPF, the SMF connected to the UPF can directly acquire the corresponding abnormal restart information from the corresponding node establishment request, so that the SMF can perform the corresponding subsequent operation according to the abnormal restart reason.
In a possible implementation manner, in the method for notifying SMF of abnormal restart of 5G UPF according to the present invention, the restart cause value may be defined by a cause value protocol in a 3G technology or a 4G technology. Where 3GPP TS and TR use four or five digit numbers, i.e., "xx. yyy", the first two digits, "xx", represent the serial number, and the last 2 or 3 digits, "yy" or "yyy" represent a particular specification in a family. For example, 3GPP TS23.228 describes the structure of IMS. The 3GPP TS and TR also include a version number, formatted as "x.y.z", where "x" stands for 3GPP Release, "y" stands for version number, and "z" is a sub-version number. For example, 3GPP TS23.228 V5.8.0 denotes the R5 version of TS 23.228; is a very mature technical specification. Therefore, in this embodiment, the restart cause value is the cause value defined in the 3GPP TS 29.244 protocol, that is, in 3GPP TS 29.244: interface between the Control Plane and the User Plane Nodes IE defines the Cause value in the protocol. As shown in the following table:
in this embodiment, the UPF abnormal restart cause value is defined by a cause value defined in a 3GPP TS 29.244 protocol, and is defined by a mature technical specification protocol, so that the SMF can further quickly acquire the abnormal restart cause of the UPF.
Specifically, as shown in fig. 4, the data interaction method provided in the present invention includes:
1. the SMF and the UPF establish a node relationship through PFCP information; the initial node establishment request sent by the SMF generally includes: node ID, optional function list supported by CP function which may affect UP function behavior, etc., at this time, if the UPF accepts the request, it will return the success reason, its Node ID, and optional function list supported by CP function which may affect UP function behavior (if any). If the UPF does not accept the request, then a PFCP Association Setup Response with the appropriate error cause should be sent.
2. If the coupling of the SMF and the UPF is successfully established, the SMF and the UPF enter a normal maintenance heartbeat flow, namely a normal flow for sending corresponding heartbeat detection according to a preset frequency and responding to the heartbeat detection sent by the other party.
3. During the running process of the UPF, abnormal restart occurs due to some reason, after the abnormal restart is successful, the UPF immediately sends abnormal restart node coupling establishment to the SMF, and configures a Cause value IE (a Cause value in a Cause is added) representing the abnormal restart of the UPF in the abnormal restart node coupling request. And the SMF receives the abnormal restarting node establishment request of the UPF entity, analyzes the Cause value to acquire that the corresponding Cause value is abnormal restarting, enters a subsequent flow aiming at the abnormal restarting of the UPF, replies the UPF, successfully establishes the node coupling and enters a normal communication stage.
In a possible implementation manner, the subsequent operation of the SMF for restarting the UPF exception includes: and deleting the resources established before the restart, and/or initiating subsequent operations such as new node establishment and the like.
Further, fig. 5 shows a UPF device according to an exemplary embodiment of the present invention, which includes:
the node establishment request sending module is used for sending a node establishment request to the SMF according to the configured SMF address after the UPF is abnormally restarted successfully;
a node establishment response receiving module, configured to receive a node establishment response sent by the SMF;
and the heartbeat detection response module is used for responding to the heartbeat detection request sent by the SMF after the node establishment response receiving module receives the node establishment feedback.
In a possible implementation manner, in the UPF device provided in the embodiment of the present invention, the node establishment request includes: a node ID, a restart timestamp, a UPF function parameter, and a restart cause value.
In general, an associated Node establishment request initiated by the UPF may carry the Node ID (Node ID), Recovery time Stamp (timestamp), UP Function Features (functions supported by the UPF), and other IEs, and may not carry the establishment cause. At this time, the associated node does not know the reason for establishing the connection after responding to the request. Therefore, in this embodiment, by directly configuring the abnormal restart reason in the node establishment request sent by the UPF, the SMF connected to the UPF can directly acquire the corresponding abnormal restart reason from the corresponding node establishment request, so that the SMF can perform corresponding subsequent operations according to the abnormal restart reason.
In a possible implementation manner, in the UPF device provided in the embodiment of the present invention, the restart cause value may be defined by using a cause value protocol in a 3G technology and a 4G technology. Optionally, the restart cause value adopts a cause value defined in 3GPP TS 29.244 protocol, that is, in 3GPP TS 29.244: interface between the Control Plane and the User Plane Nodes IE defines the Cause value in the protocol.
In this embodiment, the UPF abnormal restart cause value is defined by a cause value defined in a 3GPP TS 29.244 protocol, and is defined by a mature technical specification protocol, so that the SMF can further quickly acquire the abnormal restart cause of the UPF.
In another aspect, as shown in fig. 6, the present invention further provides a computer storage medium having stored therein program instructions for implementing the method for notifying SMF of 5G UPF abnormal restart according to the present invention when executed.
In one possible implementation, the storage medium may be a memory, e.g., may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memory.
In an embodiment of the invention, the processor may be an integrated circuit chip having signal processing capabilities. The Processor may be a 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.
The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The processor reads the information in the storage medium and completes the steps of the method in combination with the hardware.
The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory.
The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), SLDRAM (SLDRAM), and Direct Rambus RAM (DRRAM).
The storage media described in connection with the embodiments of the invention are intended to comprise, without being limited to, these and any other suitable types of memory.
It should be understood that the disclosed system may be implemented in other ways. For example, the division of the modules into only one logical function may be implemented in another way, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the communication connection between the modules may be an indirect coupling or communication connection of the server or the unit through some interfaces, and may be an electrical or other form.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and various media capable of storing program codes.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A method for notifying SMF of abnormal restart of 5G UPF is characterized by comprising the following steps:
after the UPF is abnormally restarted successfully, a node establishment request is sent to the SMF according to the configured SMF address; and receiving a node establishment response sent by the SMF, and responding to the heartbeat detection request sent by the SMF after receiving the node establishment feedback.
2. The method for 5G UPF exception restart notification SMF of claim 1, wherein the node setup request comprises: a node ID, a restart timestamp, a UPF function parameter, and a restart cause value.
3. The method for 5G UPF exception restart notification SMF of claim 2, wherein the restart cause value employs a cause value defined in 3GPP TS 29.244 protocol.
4. A UPF device, comprising:
the node establishment request sending module is used for sending a node establishment request to the SMF according to the configured SMF address after the UPF is abnormally restarted successfully;
a node establishment response receiving module, configured to receive a node establishment response sent by the SMF;
and the heartbeat detection response module is used for responding to the heartbeat detection request sent by the SMF after the node establishment response receiving module receives the node establishment feedback.
5. The UPF device of claim 4, wherein the node establishment request comprises: a node ID, a restart timestamp, a UPF function parameter, and a restart cause value.
6. The UPF device of claim 5, wherein the restart cause value employs a cause value defined in a 3GPP TS 29.244 protocol.
7. An interactive system, comprising:
at least one UPF, which is used for sending a node establishment request to the SMF according to the configured SMF address after the abnormal restart is successful; receiving a node establishment response sent by the SMF, and responding to a heartbeat detection request sent by the SMF after receiving the node establishment feedback;
and the SMF is used for receiving a node establishment request sent by the UPF, sending a node establishment response to the UPF, and sending a heartbeat detection request to the UPF after the abnormal restart processing of the UPF.
8. The interactive system of claim 7, comprising: the node establishment request comprises: a node ID, a restart timestamp, a UPF function parameter, and a restart cause value.
9. The UPF device of claim 8, wherein the restart cause value employs a cause value defined in a 3GPP TS 29.244 protocol.
10. A computer storage medium having stored thereon program instructions for implementing a method of 5G UPF exception restart notification SMF as claimed in any one of claims 1 to 3 when executed.
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| NOKIA: "\"3GPP C4-214245_29244_Rel17_Retention of PFCP sessions during UPF initiated Association Setup\"", 3GPP TSG_CT\\WG4_PROTOCOLLARS_EX-CN4, pages 1 - 6 * |
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