CN113242141B - Fault detection method and device for user plane network element - Google Patents
Fault detection method and device for user plane network element Download PDFInfo
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Abstract
The application discloses a fault detection method and a device for a user plane network element, wherein the method is applied to the user plane network element and comprises the following steps: sending a detection message to an opposite terminal address, and determining the feedback state of the detection message; if the feedback state is a fault state, carrying out state detection on the communication gateway corresponding to the opposite terminal address so as to determine a fault type; if the fault type is a local fault, determining a first fault message; reporting the first fault message; carrying out state detection on a communication gateway corresponding to the user plane network element in a fault state so as to obtain a fault type; according to the method and the device, the problem that each communication path generates a fault message when the user plane network element is in a local fault is avoided, namely, the condition that a large number of unnecessary fault messages occur is avoided, unnecessary fault message processing is not needed, and operation resources are saved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for detecting a fault of a user plane network element.
Background
In a 5G core network system, a User Plane network element (UPF, commonly called User Plane Function) can undertake a reliability maintenance task for a relevant communication path; that is, the reachability of the communication path is detected, and it is determined whether the communication state is normal. Further, the user plane network element may report the detection result to a Session Management Function (SMF) so as to facilitate subsequent processing of the fault.
However, in the prior art, the user plane network element can only determine whether a fault exists through detection, but cannot determine the specific type of the fault. Or, it cannot be determined whether the failure is from the local user plane network element or from the opposite end of the communication path. Therefore, part of unnecessary fault reporting may be brought, and the fault processing is not facilitated.
Disclosure of Invention
The application provides a fault detection method and device for a user plane network element.
In a first aspect, the present application provides a method for detecting a fault of a user plane network element, where the method is applied to a user plane network element, and the method includes:
sending a detection message to an opposite terminal address, and determining the feedback state of the detection message;
if the feedback state is a fault state, carrying out state detection on a communication gateway corresponding to the opposite terminal address so as to determine a fault type;
if the fault type is a local fault, determining a first fault message; and reporting the first fault message.
Preferably, the determining the feedback state of the detection packet includes:
and if a feedback message determined according to the detection message is not received from the opposite terminal address, determining the feedback state as a fault state.
Preferably, the performing state detection on the communication gateway corresponding to the peer address to determine the fault type includes:
detecting the communication gateway by using a preset detection program;
if the communication gateway passes the detection, determining the fault type as an opposite end fault;
and if the communication gateway fails to pass the detection, determining the fault type as a local fault.
Preferably, the determining the first fault packet includes:
and determining the first fault message according to the virtual address.
Preferably, the method further comprises the following steps:
if the first preset condition is met, determining a first recovery message according to the virtual address;
and reporting the first recovery message.
In a second aspect, the present application provides a method for selecting a user plane network element, where the method is applied to a session management network element, and the method includes:
determining the fault type of the user plane network element according to a fault message reported by the user plane network element;
if the user plane network element does not comprise the fault condition that the fault type is the local fault, determining the user plane network element as an alternative user plane network element;
and determining a target user plane network element from the alternative user plane network elements.
Preferably, the determining the fault type of the user plane network element according to the fault message reported by the user plane network element includes:
if the user plane network element reports the first fault message, determining the fault type of the user plane network element as a local fault;
and if the user plane network element does not report the first fault message, the user plane network element does not include the fault condition that the fault type is a local fault.
Preferably, the method further comprises the following steps:
determining the user plane network element with the fault type as a local fault as a fault network element;
and if a first recovery message reported by the fault network element is received, determining the fault user plane network element as the alternative user plane network element.
In a third aspect, the present application provides a device for detecting a fault of a user plane network element, including:
the first detection module is used for sending a detection message to an opposite terminal address and determining the feedback state of the detection message;
a second detection module, configured to perform state detection on the communication gateway corresponding to the peer address when the feedback state is a failure state, so as to determine a failure type;
the first fault message determining module is used for determining a first fault message when the fault type is a local fault; and reporting the first fault message.
In a fourth aspect, the present application provides an apparatus for selecting a user plane network element, including:
the fault type determining module is used for determining the fault type of the user plane network element according to the fault message reported by the user plane network element;
an alternative user plane network element determining module, configured to determine the user plane network element as an alternative user plane network element when the user plane network element does not include a fault condition that a fault type is a local fault;
and the target user plane network element determining module is used for determining the target user plane network element from the alternative user plane network elements.
Compared with the prior art, the method and the device for detecting the fault of the user plane network element have the advantages that the state of the communication gateway corresponding to the user plane network element is detected in the fault state, so that the fault type is detected; reporting the first fault message under the condition of local fault of a user plane network element; therefore, the fault type is determined, and is embodied through the fault message; the method avoids the condition that each communication path generates fault messages when the user plane network element has a local fault, namely avoids the occurrence of a large amount of unnecessary fault messages, does not need to process the unnecessary fault messages, and saves the operation resources.
Drawings
Fig. 1 is a schematic flowchart of a method for detecting a fault of a user plane network element according to an embodiment of the present application;
fig. 2 is a schematic flowchart of a method for selecting a user plane network element according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a fault detection apparatus for a user plane network element according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a device for selecting a user plane network element according to an embodiment of the present application.
Detailed Description
In order to make the objects, features and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
In the prior art, a user plane network element can only judge whether a fault exists through detection, but cannot judge the specific type of the fault. Or, it cannot be determined whether the failure is from the local user plane network element or from the peer device of the communication path.
It can be understood that, if a pair of end devices of the user plane network element has a fault, the user plane network element itself is not affected and can still normally communicate with other end devices. Otherwise, if the user plane network element has a fault, the user plane network element cannot communicate with any opposite terminal equipment. At this time, each communication path of the user plane network element may generate one fault message, that is, a large number of unnecessary fault messages may occur. Processing a large number of fault messages wastes computing resources.
And in some cases, the session management network element may select the user plane network element according to a certain condition, so as to execute a corresponding function. Theoretically, if the fault does not occur locally in the user plane network element, it can be selected as a normal user plane network element; but if the failure occurs locally in the user plane network element, it should not be selected as a failed user plane network element. However, since the existing fault detection cannot determine the fault type, the failed user plane network element cannot be accurately determined in the selection process.
Therefore, the embodiment of the present application will provide a method for detecting a fault of a user plane network element, which is applied to the user plane network element. As shown in fig. 1, the method in this embodiment includes the following steps:
The opposite terminal address is a communication address of an opposite terminal device for the user plane network element communication connection. In this step, a detection message may be sent to the opposite-end address for detection in a conventional manner. According to the feedback state of the detection message, whether the communication path is normal or not can be determined.
Specifically, if a feedback message determined according to the detection message is received from the opposite-end address, it indicates that the communication path is normal, that is, the feedback state is a normal state. On the contrary, if the feedback message determined according to the detection message is not received from the opposite-end address, the feedback state can be determined as the fault state. When the feedback status is a failure status, it can be determined that there is a failure on the communication path, but it is not possible to determine the type of the failure, that is, it is not possible to determine whether the failure occurs locally in the user plane network element or locally in the peer device.
In this embodiment, the communication path between the user plane network element and the peer device may be implemented based on a GTP-U communication channel. The corresponding failure detection may be based on the ECHO mechanism in the GTP-U communication path. Of course, the communication path and the related fault detection may also be implemented by other communication methods, which is not limited in this embodiment. Any similar detection process can be incorporated into the overall solution of the present embodiment.
And 102, if the feedback state is a fault state, carrying out state detection on the communication gateway corresponding to the opposite-end address to determine the fault type.
After determining the fault status, the fault type is further determined in this embodiment. In this regard, the communication gateway responsible for connecting the opposite end address on the user plane network element, that is, the communication gateway corresponding to the failed communication path, may be determined. And then performs status detection on the communication gateway.
Specifically, the communication gateway may be detected by using a preset detection program. The state of the communication gateway represents the communication state local to the user plane network element. Therefore, if the communication gateway passes the detection, the local communication state is normal, and the fault type can be determined as the opposite-end fault. If the communication gateway fails to pass the detection, it means that the fault occurs in the user plane network element itself, that is, the fault type is determined as a local fault. The detection program can be implemented by using a PING program (i.e., Packet Internet Groper, a network diagnostic tool) in the field.
If the fault type is determined to be a local fault, it indicates that the user plane network element has a fault and cannot communicate with any opposite terminal equipment. Therefore, the first fault message can be generated under the condition to reflect the condition, and each communication path is prevented from generating the fault message, namely, a large amount of unnecessary fault messages are prevented from occurring.
Specifically, the first failure packet may be determined according to the virtual address. Conventional fault message formats typically include a peer address to indicate the source of the fault. In the first failure message, the conventional failure message format can be used, and the virtual address replaces the opposite address. This makes the first failure message no longer have a real communication address, so there is no directivity for any peer device. Therefore, the meaning that the fault occurs locally instead of at a specific opposite end can be embodied. Therefore, the virtual address needs to be different from any real peer address. For example, the virtual address corresponding to IPv4 may be "0.0.0.0", and the virtual address corresponding to IPv6 may be ": : ".
In other cases, if the failure type is an opposite-end failure, a second failure packet including an opposite-end address may also be determined. The second fault message can determine that the real source of the fault is the address of the opposite end, that is, the existence of the fault cannot be reflected, and the type and the source of the fault can also be reflected.
In this embodiment, the user plane network element may report the first fault packet and the second fault packet, for example, to the session management network element, so as to reflect a related fault condition, so as to facilitate subsequent processing.
In addition, if the local failure of the user plane network element is recovered after the related failure processing, that is, the first preset condition is met, the first recovery packet may also be generated according to the virtual address. And reporting the first recovery message to the session management network element, which means that the session management network element is informed that the local fault is recovered to normal.
According to the technical scheme, the beneficial effects of the embodiment are as follows: carrying out state detection on a communication gateway corresponding to the user plane network element in a fault state so as to obtain a fault type; reporting the first fault message under the condition of local fault of a user plane network element; therefore, the fault type is determined, and is embodied through the fault message; the method avoids the condition that each communication path generates fault messages when the user plane network element has a local fault, namely avoids the condition that a large number of unnecessary fault messages occur, does not need to process the unnecessary fault messages, and saves the operation resources.
Fig. 2 shows a specific embodiment of the method for selecting a user plane network element according to the present application. The method in the embodiment is applied to a session management network element. It can be considered that the selection of the user plane network element in this embodiment corresponds to the fault detection of the user plane network element in the embodiment shown in fig. 1. That is, in this embodiment, the session management network element selects the user plane network element based on the above fault detection result. The method in this embodiment specifically includes the following steps:
Before selecting the user plane network element, the session management network element may receive the fault message from each user plane network element, thereby determining whether the user plane network element has a fault and a specific fault type. Specifically, the fault message may be a first fault message determined according to the method in the embodiment shown in fig. 1; or in some cases, may be a second failure message.
If the user plane network element reports the first fault message, the session management network element may determine the fault type of the user plane network element as a local fault, that is, the user plane network element itself has a fault at this time. Otherwise, if the user plane network element does not report the first fault message, it indicates that the user plane network element does not include the fault condition that the fault type is the local fault, that is, the user plane network element is in the normal communication state.
The condition that the user plane network element does not report the first fault message may be that no fault message is reported, or that other fault messages except the first fault message are reported, for example, the second fault message. In the above case, it should be considered that there is no local fault. And according to other fault messages, determining the corresponding fault type of the user plane network element. For example, for the second failure packet, it may be determined that the failure type is an opposite end failure.
Theoretically, if the fault does not occur locally in the user plane network element, it can be selected as a normal user plane network element; but if the failure occurs locally in the user plane cell, it should not be selected as a failed user plane cell. Therefore, it can be shown that the fault condition that the fault type is the local fault does not exist only if the user plane network element does not report the first fault message, and normal communication can be performed. And may be selected by the session management network element. So that the user plane network element that does not report the first failure message can be determined as an alternative user plane network element. The alternative user plane network element can be used as an object selectable by the session management network element.
In this embodiment, the session management network element may be enhanced through a targeted design, so as to analyze the first failure packet and identify the virtual address in the first failure packet. In other words, when the session management network element identifies the virtual address, it can determine that the fault message is the first fault message. And the user plane network element which reports the first fault message has a fault condition that the fault type is a local fault, so the user plane network element is determined as a fault network element.
Further, a fault management table corresponding to the user plane network element may be formulated, and the fault management table records the fault network element. When a user plane network element is determined to be a faulty network element, it can be recorded in the fault management table.
If the local failure is recovered after the failed network element is subjected to the relevant failure processing, a first recovery packet may be generated and reported accordingly, that is, as described in the embodiment shown in fig. 1. If the session management network element receives the first recovery message reported by the faulty network element, it may be considered that the local fault does not exist anymore. When the session management network element identifies the virtual address in the first recovery message, it may be determined that the corresponding user plane network element has recovered, and the failed user plane network element may be determined as an alternative user plane network element again. That is, the faulty network element can be deleted from the fault management table.
And the user plane network elements which are not included in the fault management table can be regarded as alternative user plane network elements. In some cases, alternative user plane network elements may also be added to a particular set, for example to an alternative list.
In other cases, the session management network element may also identify other fault messages, for example, the second fault message in the embodiment shown in fig. 1. That is, the opposite terminal address included in the second fault message is obtained through analysis, so that the source of the opposite terminal fault is determined.
The alternative user plane network is the user plane network element which has no local fault and can be selected by the session management network element. After the alternative user plane network elements are determined, further selection may be performed.
Specifically, the user equipment may query and select from all the candidate user plane network elements in combination with other preset selection conditions, for example, using a Data Network Name (DNN), an IMEI Type Assignment Code (TAC), and the like as a filtering condition. Or from the list of alternatives, to determine the target user plane network element.
Or, in combination with the preset selection condition, the selection is performed in advance from all the user plane network elements, so as to select a certain user plane network element. And further judging whether the selected user plane network element is an alternative user plane network element. I.e. whether it is present in the fault management table or in the alternative list. If the selected user plane network element is an alternative user plane network element, the selected user plane network element can be directly selected as a target user plane network element. If the selected user plane network element is not an alternative user plane network element, indicating that the selected user plane network element has a local fault and is not selectable, the selection should be performed again.
Through the above manner, in this embodiment, the target user plane network element is determined from the alternative user plane network elements. Since it can be determined that no local fault exists in the alternative user plane network elements, the selected target user plane network element must not have a local fault. After the selection is carried out, the subsequent communication work can be normally executed, and the situation that the subsequent communication is influenced because the target user plane network element has a fault can not be encountered.
So far, the present embodiment, in combination with the fault detection in the embodiment shown in fig. 1, realizes selection of a user plane network element. Therefore, whether the local fault exists can be judged by combining the user plane fault type, and the selection process is more accurate.
Fig. 3 shows a specific embodiment of the apparatus for detecting a fault of a user plane network element according to the present application. The apparatus of this embodiment is a physical apparatus for performing the method described in fig. 1. The technical solution is substantially the same as that in the above embodiment, and the corresponding description in the above embodiment is also applicable to the present embodiment. The apparatus in this embodiment includes:
the first detection module 301 is configured to send a detection packet to the peer address, and determine a feedback state of the detection packet.
The second detecting module 302 is configured to, when the feedback state is a failure state, perform state detection on the communication gateway corresponding to the peer address to determine a failure type.
A first fault message determining module 303, configured to determine a first fault message when the fault type is a local fault; and reporting the first fault message.
In addition, on the basis of the embodiment shown in fig. 3, it is preferable that:
the second detection module 302 includes:
a first detecting unit 321, configured to detect a communication gateway by using a preset detection program; and when the communication gateway passes the detection, determining the fault type as the opposite end fault.
A second detecting unit 322, configured to detect the communication gateway by using a preset detection program; when the communication gateway fails the detection, the fault type is determined as a local fault.
Further comprising:
a recovery message determining module 304, configured to determine a first recovery message according to the virtual address when a first preset condition is met; and reporting the first recovery message.
Fig. 4 shows a specific embodiment of the selection apparatus for a user plane network element according to the present application. The apparatus of this embodiment is a physical apparatus for executing the method described in fig. 2. The technical solution is substantially the same as that in the above embodiment, and the corresponding description in the above embodiment is also applicable to the present embodiment. The device in the embodiment comprises:
the fault type determining module 401 is configured to determine a fault type of the user plane network element according to a fault message reported by the user plane network element.
A module 402 for determining an alternative user plane network element, configured to determine the user plane network element as the alternative user plane network element when the user plane network element does not include a fault condition that the fault type is a local fault.
A target user plane network element determining module 403, configured to determine a target user plane network element from the alternative user plane network elements.
In addition, on the basis of the embodiment shown in fig. 4, it is preferable that:
the fault type determination module 401 includes:
the third detecting unit 411 is configured to determine the fault type of the user plane network element as a local fault when the user plane network element reports the first fault packet.
A fourth detecting unit 412, configured to, when the user plane network element does not report the first fault packet, the user plane network element does not include a fault condition that the fault type is a local fault.
Further comprising:
and a faulty network element determining module 404, configured to determine the user plane network element with the fault type being the local fault as a faulty network element.
The recovery module 405 is configured to determine the failed user plane network element as the alternative user plane network element when receiving the first recovery packet reported by the failed network element.
In addition to the above-described methods and apparatus, embodiments of the present application may also be a computer program product comprising computer program instructions that, when executed by a processor, cause the processor to perform the steps in the methods according to the various embodiments of the present application described in the "exemplary methods" section of this specification, above.
The computer program product may be written with program code for performing the operations of embodiments of the present application in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present application may also be a computer readable storage medium having stored thereon computer program instructions that, when executed by a processor, cause the processor to perform steps in a method according to various embodiments of the present application described in the "exemplary methods" section above of this specification.
The computer readable storage medium may take any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The basic principles of the present application have been described above with reference to specific embodiments, but it should be noted that advantages, effects, etc. mentioned in the present application are only examples and are not limiting, and the advantages, effects, etc. must not be considered to be possessed by various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is provided for purposes of illustration and understanding only, and is not intended to limit the application to the details which are set forth in order to provide a thorough understanding of the present application.
The block diagrams of devices, apparatuses, devices, systems referred to in this application are only used as illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by one skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. As used herein, the words "or" and "refer to, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
It should also be noted that in the devices, apparatuses, and methods of the present application, the components or steps may be decomposed and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
Claims (9)
1. A method for detecting a fault of a user plane network element, the method being applied to the user plane network element, the method comprising:
sending a detection message to an opposite terminal address, and determining the feedback state of the detection message;
if the feedback state is a fault state, carrying out state detection on the communication gateway corresponding to the opposite terminal address so as to determine a fault type;
if the fault type is a local fault, determining a first fault message; reporting the first fault message;
wherein the performing state detection on the communication gateway corresponding to the opposite terminal address to determine the fault type includes:
detecting the communication gateway by using a preset detection program;
if the communication gateway passes the detection, determining the fault type as an opposite end fault;
and if the communication gateway fails to pass the detection, determining the fault type as a local fault.
2. The method of claim 1, wherein determining the feedback status of the detection packet comprises:
and if a feedback message determined according to the detection message is not received from the opposite terminal address, determining the feedback state as a fault state.
3. The method of claim 1, wherein determining the first failure message comprises:
and determining the first fault message according to the virtual address.
4. The method of any of claims 1 to 3, further comprising:
if the first preset condition is met, determining a first recovery message according to the virtual address;
and reporting the first recovery message.
5. A method for selecting a user plane network element, the method being applied to a session management network element, the method comprising:
determining the fault type of the user plane network element according to the fault message reported by the user plane network element;
if the user plane network element does not comprise the fault condition that the fault type is the local fault, determining the user plane network element as an alternative user plane network element;
and determining a target user plane network element from the alternative user plane network elements.
6. The method of claim 5, wherein the determining the fault type of the user plane network element according to the fault packet reported by the user plane network element comprises:
if the user plane network element reports a first fault message, determining the fault type of the user plane network element as a local fault;
and if the user plane network element does not report the first fault message, the user plane network element does not include the fault condition that the fault type is a local fault.
7. The method of claim 6, further comprising:
determining the user plane network element with the fault type as a local fault as a fault network element;
and if a first recovery message reported by the fault network element is received, determining the fault user plane network element as the alternative user plane network element.
8. A failure detection apparatus of a user plane network element, comprising:
the first detection module is used for sending a detection message to an opposite terminal address and determining the feedback state of the detection message;
a second detection module, configured to perform state detection on the communication gateway corresponding to the peer address when the feedback state is a failure state, so as to determine a failure type;
the first fault message determining module is used for determining a first fault message when the fault type is a local fault; reporting the first fault message;
the second detection module is specifically configured to detect the communication gateway by using a preset detection program;
if the communication gateway passes the detection, determining the fault type as an opposite end fault;
and if the communication gateway fails to pass the detection, determining the fault type as a local fault.
9. A selection apparatus of a user plane network element, comprising:
the fault type determining module is used for determining the fault type of the user plane network element according to the fault message reported by the user plane network element;
an alternative user plane network element determining module, configured to determine the user plane network element as an alternative user plane network element when the user plane network element does not include a fault condition that a fault type is a local fault;
and the target user plane network element determining module is used for determining the target user plane network element from the alternative user plane network elements.
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