Communication method, device and system

Abstract

The invention provides a communication method, device and system, which are used for improving the reliability of a communication network. The method can be executed by a network data analysis function network element, and the method comprises the following steps: receiving a first request from a first network element, the first request comprising a first identifier of a target network element; and sending a first response to the first network element, wherein the first response comprises analysis information of the message received by the target network element and / or analysis information of the message sent by the target network element.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method, device and system. Background Art

[0002] With the development of communication technology, the types and number of network elements in communication networks are becoming more and more diverse, and the number of user terminals participating in wireless communication is also increasing. User terminals can initiate signaling requests to various network elements in the wireless communication network to obtain network functions provided by each network element. However, when a network element receives a large number of request messages, if the processing capacity of the network element is insufficient, it will cause network congestion and even an avalanche effect, making the entire network unavailable. The industry calls this phenomenon a network signaling storm.

[0003] There are many reasons for the occurrence of network signaling storms. In one case, it is a network signaling storm caused by abnormal users. Network failures in some areas cause users in the area to be unable to access the network, making users in the area abnormal users. Abnormal users will send multiple request messages to network elements in the network. When the network elements receive a large number of request messages, these network elements will randomly discard some of the received request messages. The randomly discarded request messages may include registration request messages initiated by abnormal users and update request messages initiated by normal users. When the update request messages of normal users are discarded, the communication process of normal users will be blocked, and normal users will become abnormal users. In this way, the number of abnormal users in the network will increase, which will cause the network elements in the network to receive more and more request messages. When the request messages received by the network elements in the network exceed the message processing capacity of the network elements, a network signaling storm will occur. For example Figure 1A As shown in the figure, in another case, a network signaling storm is caused by an abnormal path. Taking the PCF device in the data domain as an example, when a communication path to the PCF is disconnected, the number of request messages sent by the UE to the PCF reaches 50,000, while the request message sent to the PCF by another path is 50001. After this request message reaches the PCF, because the processing capacity of the PCF has been occupied, the PCF will discard the message or reply with an error code, which will cause the communication process of this path to be blocked, causing this path to become an abnormal path. There are more and more abnormal paths in the network, which will trigger network signaling storms on all paths.

[0004] Therefore, how to prevent network signaling storms to improve the reliability of communication networks is an urgent problem to be solved in this field. Summary of the invention

[0005] The present application provides a communication method, device and system for improving the reliability of a communication network.

[0006] In a first aspect, the present application provides a communication method, which can be executed by a network data analysis function network element, and the method may include: receiving a first request from a first network element, the first request including a first identifier of a target network element; sending a first response to the first network element, the first response including analysis information of a message received by the target network element and / or analysis information of a message sent by the target network element.

[0007] In the above technical solution, the first request received by the network data analysis function network element from the first network element includes the first identifier of the target network element, and then the network data analysis function network element can feed back to the first network element the analysis information of the message received by the target network element and / or the analysis information of the message sent by the target network element. In this way, the first network element can preliminarily judge the behavior characteristics of the user equipment sending messages and / or the state of the network (such as whether signaling congestion occurs, and then judge the probability of a signaling storm occurring in the network) based on the analysis information of the message received by the target network element and / or the analysis information of the message sent by the target network element, and take corresponding measures to prevent the occurrence of network signaling storms, thereby effectively improving the reliability of the communication network.

[0008] In an embodiment of the present application, the analysis information of the message received by the target network element includes at least one statistical information. The at least one statistical information may include, for example, at least one of a specific value corresponding to a parameter, a specific value corresponding to a parameter being within a first numerical range, a specific value corresponding to a parameter being greater than or equal to a first numerical value, or a specific value corresponding to a parameter being less than or equal to a first numerical value.

[0009] In one possible design, the at least one statistical information may include the total number of messages received by the target network element and / or the total number of messages corresponding to the first message type received by the target network element. In this design, by counting the total number of messages received by the target network element, the network data analysis function network element or the first network element can determine whether there is a risk of a network signaling storm in the communication network based on the total number of messages received by the target network element; and / or, by counting the total number of messages corresponding to the first message type received by the target network element, the network data analysis function network element or the first network element can determine whether there is a risk of a network signaling storm in the first message type dimension based on the total number of messages corresponding to the first message type received by the target network element.

[0010] Optionally, the at least one statistical information also includes at least one of the following items: the total number of messages received by the target network element in the first time period, the total number of messages corresponding to the first message type received by the target network element in the first time period, and the total number of devices that initiate messages of the first message type in the first time period greater than the first number. In this design, by counting the total number of messages received by the target network element in the first time period, the network data analysis function network element or the first network element can determine whether the communication network has a risk of a network signaling storm in the first time period based on the total number of messages received by the target network element in the first time period; or, by counting the total number of messages corresponding to the first message type received by the target network element in the first time period, the network data analysis function network element or the first network element can determine whether the communication network has a risk of a network signaling storm in the first time period based on the total number of messages corresponding to the first message type received by the target network element in the first message type dimension; or, by counting the total number of devices that initiate messages of the first message type in the first time period greater than the first number, the network data analysis function network element or the first network element can analyze devices with abnormal behavior.

[0011] In an embodiment of the present application, the analysis information of the message sent by the target network element includes at least one statistical information. The at least one statistical information may include, for example, at least one of a specific value corresponding to a parameter, a specific value corresponding to a parameter being within a first numerical range, a specific value corresponding to a parameter being greater than or equal to a first numerical value, or a specific value corresponding to a parameter being less than or equal to a first numerical value.

[0012] In one possible design, the at least one statistical information includes the total number of messages sent by the target network element and / or the total number of messages corresponding to the first message type sent by the target network element. In this design, by counting the total number of messages sent by the target network element, the network data analysis function network element or the first network element can determine whether there is a risk of a network signaling storm in the communication network based on the total number of messages sent by the target network element; and / or, by counting the total number of messages corresponding to the first message type sent by the target network element, the network data analysis function network element or the first network element can determine whether there is a risk of a network signaling storm in the first message type dimension based on the total number of messages corresponding to the first message type sent by the target network element.

[0013] Optionally, the at least one statistical information also includes at least one of the following: the total number of response messages sent by the target network element, the total number of response messages corresponding to the first message type sent by the target network element, the reason corresponding to the response message sent by the target network element, or the total number of response messages corresponding to the first reason sent by the target network element. In this design, the analysis information of the message sent by the target network element also includes statistical information related to the response message sent by the target network element, so that the network data analysis function network element or the first network element can determine whether there is a risk of network signaling storm in the communication network based on the statistical information related to the response message sent by the target network element.

[0014] In a possible design, the first response also includes at least one of the following: the type of the target network element, the instance identifier of the target network element, or the CPU usage of the target network element. Among them, the type of the target network element, the instance identifier of the target network element, = and the CPU usage of the target network element are information of the target network element dimension; in this way, by counting the information of the target network element dimension, the first network element or the NWDAF network element can analyze the information of the target network element dimension, which helps the first network element to adjust the strategy in the network element dimension to prevent the occurrence of network signaling storms.

[0015] In one possible design, the first request also includes a first condition; wherein the first condition includes at least one of the following: the first parameter corresponds to a first value; the first value corresponding to the first parameter is greater than or equal to a first threshold; or, the first value corresponding to the first parameter is less than or equal to the first threshold; accordingly, sending a first response to the first network element includes: sending a first response to the first network element when the first condition is met.

[0016] In a possible design, the first request also includes a first time window, and the first time window is used to determine a second time period for the target network element to receive a message and / or the target network element to send a message, and the second time period is used to determine the time used for performing statistical analysis on the message received by the target network element and / or the message sent by the target network element. In a possible scenario, for example, the time used for performing statistical analysis on the message received by the target network element to obtain at least one statistical information is the first time period, and in this case, the second time period may include the first time period.

[0017] In one possible design, the method also includes: obtaining first information from a second network element, the first information including the type and / or total number of messages received by the target network element, and / or the type and / or total number of messages sent by the target network element; determining the first response based on the first information.

[0018] In one possible design, the method further includes: obtaining second information from a third network element, the second information including at least one of an instance identifier of the target network element, signaling statistics measurement, CPU usage of the target network element and / or the fourth network element, or load of the target network element and / or the fourth network element; correspondingly, determining a first response based on the first information includes: determining the first response based on the first information and the second information. In this design, the first response corresponding to the first request can be determined in combination with the first information and the second information.

[0019] In one possible design, the first network element is any one of the following: a mobility management function AMF network element, an operation and maintenance management OAM network element, a network storage function NRF network element, a policy control function PCF network element, or an application function AF network element. In this design, the first network element can have multiple implementations, so that the communication method provided in the embodiment of the present application can be flexibly implemented.

[0020] In a second aspect, an embodiment of the present application provides a communication method, which is applied to a first network element, and the method includes: sending a first request to a network data analysis function network element, the first request including a first identifier of a target network element; receiving a first response from the network data analysis function network element, the first response including analysis information of a message received by the target network element and / or analysis information of a message sent by the target network element.

[0021] In an embodiment of the present application, the analysis information of the message received by the target network element includes at least one statistical information.

[0022] In one possible design, the at least one statistical information includes a total number of messages received by the target network element and / or a total number of messages of a corresponding first message type received by the target network element.

[0023] Optionally, the at least one statistical information also includes at least one of the following items: the total number of messages received by the target network element in the first time period, the total number of messages corresponding to the first message type received by the target network element in the first time period, and the total number of devices that initiate messages of the first message type in the first time period that are greater than the first number.

[0024] In an embodiment of the present application, the analysis information of the message sent by the target network element includes at least one statistical information.

[0025] In one possible design, the at least one statistical information includes a total number of messages sent by the target network element and / or a total number of messages of a corresponding first message type sent by the target network element.

[0026] Optionally, the at least one statistical information also includes at least one of the following items: the total number of response messages sent by the target network element, the total number of response messages corresponding to the first message type sent by the target network element, the reasons corresponding to the response messages sent by the target network element, or the total number of response messages corresponding to the first reason sent by the target network element.

[0027] In one possible design, the first response also includes at least one of the following: the type of the target network element, the instance identifier of the target network element, or the CPU usage of the target network element.

[0028] In one possible design, the first request also includes a first time window, the first time window is used to determine a second time period for the target network element to receive a message and / or the target network element to send a message, and the second time period is used to determine a time period corresponding to at least one statistical information. In one possible scenario, at least one statistical information includes at least one of the following: the total number of messages received by the target network element in the first time period, the total number of messages corresponding to the first message type received by the target network element in the first time period, the total number of devices that initiate messages of the first message type in the first time period that is greater than the first number, in which case the second time period may include the first time period.

[0029] In a possible design, when the first network element is an access and mobility management function AMF network element, the method further includes: adjusting the flow control strategy of the AMF network element according to the first response; wherein the flow control strategy includes one or more of the following: adjusting the number of AMFs in the AMF pool that perform signaling interaction with the wireless access device NG-RAN, adjusting the proportion of rejection messages returned by the AMF network element, adjusting the value of the backoff timer carried in the rejection message returned by the AMF network element, or adjusting the number of messages sent by each NG-RAN to the AMF network element. In this design, after receiving the analysis information, the AMF network element adjusts the flow control strategy of the AMF network element according to the analysis information, which can effectively prevent network signaling storms and thereby effectively improve the reliability of the communication network.

[0030] In one possible design, when the first network element is an operation, maintenance and management (OAM) network element, the method further includes: adjusting the network configuration according to the first response; wherein the adjusting the network configuration includes at least one or more of the following: adjusting the flow control threshold configured for each network element in the wireless communication network, adjusting the number of AMFs in the AMF pool, adjusting the number of devices with bottleneck processing capabilities in the network, or the routing strategy. In this design, after receiving the analysis information, the OAM network element adjusts the network configuration according to the analysis information, which can effectively prevent network signaling storms and thereby effectively improve the reliability of the communication network.

[0031] In one possible design, when the first network element is a network storage function NRF network element, the method further includes: adjusting the priority of the target network element according to the first response, and the priority of the target network element is the reference information when the NRF network element selects the target network element. In this design, after receiving the analysis information, the NRF network element can adjust the priority of the target network element according to the analysis information, and then the NRF network element can refer to the priority when selecting the target network element, so that the network element selected by the NRF network element will not cause network congestion, and the occurrence of signaling storms due to signaling congestion of the network element can be prevented, thereby effectively improving the reliability of the communication network.

[0032] In a possible design, when the first network element is a policy control function PCF network element, the method further includes: adjusting the routing selection strategy URSP for UE data transmission or the future background data transmission strategy according to the first response. In this design, after receiving the analysis information, the PCF network element can adjust the routing selection strategy URSP for UE data transmission or the future background data transmission strategy according to the analysis information, so that the UE can avoid the network element where the signaling request is rejected, thereby effectively avoiding the increase in network congestion caused by UE data transmission and future background data transmission, thereby preventing the occurrence of network signaling storms, and effectively improving the reliability of the network.

[0033] In one possible design, when the first network element is an application function AF network element, the method further includes: adjusting the strategy of the AF initiating a service request according to the first response; wherein the strategy of the service request includes the time and / or frequency of the AF initiating the service request. In this design, after receiving the analysis information, the AF network element can adjust the strategy of the AF network element initiating a service request according to the analysis information, such as reducing the duration and / or frequency of the AF initiating a service request. This can avoid preventing the AF's request from aggravating network congestion and preventing the generation or spread of a network signaling storm, thereby effectively improving the reliability of the network.

[0034] In a third aspect, an embodiment of the present application further provides a communication device, which includes a module or unit for implementing the method described in the first aspect and any possible design of the first aspect.

[0035] In a fourth aspect, an embodiment of the present application further provides a communication device, which includes a module or unit for implementing the method described in the second aspect and any possible design of the second aspect.

[0036] In a fifth aspect, an embodiment of the present application further provides a communication device, which includes: a processor and a communication interface, wherein the communication interface is used to receive signals from other devices outside the communication device and transmit them to the processor or send signals from the processor to other devices outside the communication device, and the processor executes code instructions through a logic circuit to implement the method described in the first aspect and any possible design of the first aspect, or implements the method described in the second aspect and any possible design of the second aspect. Optionally, the communication device may also include a memory, which is coupled to the processor and stores program instructions and data necessary for the device.

[0037] In a sixth aspect, an embodiment of the present application further provides a communication system, which includes the communication device as described in the third aspect and the communication device as described in the fourth aspect.

[0038] In the seventh aspect, an embodiment of the present application provides a chip system, comprising: a processor, the processor is coupled to a memory, the memory is used to store programs or instructions, when the program or instructions are executed by the processor, the chip system implements the method in the above-mentioned first aspect or any possible design of the first aspect, or implements the above-mentioned second aspect or any possible design of the second aspect.

[0039] Optionally, the chip system also includes an interface circuit, which is used to interact with code instructions to the processor.

[0040] Optionally, there may be one or more processors in the chip system, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc. When implemented by software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

[0041] Optionally, the memory in the chip system may be one or more. The memory may be integrated with the processor or may be separately provided with the processor, which is not limited in the present application. Exemplarily, the memory may be a non-transient processor, such as a read-only memory (ROM), which may be integrated with the processor on the same chip or may be provided on different chips. The present application does not specifically limit the type of memory and the arrangement of the memory and the processor.

[0042] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program or instructions stored thereon. When the computer program or instructions are executed, the computer executes the method in the first aspect or any possible design of the first aspect, or executes the second aspect or any possible design of the second aspect.

[0043] In the ninth aspect, an embodiment of the present application provides a computer program product. When a computer reads and executes the computer program product, the computer executes the method in the above-mentioned first aspect or any possible design of the first aspect, or executes the above-mentioned second aspect or any possible design of the second aspect.

[0044] In a tenth aspect, an embodiment of the present application provides a communication system, which includes the communication device described in the third aspect or the communication device described in the fourth aspect.

[0045] For the beneficial effects of the second to ninth aspects mentioned above, please refer to the technical effects that can be achieved by the corresponding design in the first aspect mentioned above, and they will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1A One of the flow diagrams showing the occurrence of a network signaling storm is shown;

[0047] Figure 1B The second flowchart of the occurrence of a network signaling storm is shown;

[0048] Figure 2A A schematic diagram showing an exemplary architecture of a possible communication system applicable to the embodiments of the present application;

[0049] Figure 2B A schematic diagram showing an architecture of another possible communication system to which the embodiments of the present application are applicable;

[0050] Figure 2C A schematic diagram showing an architecture of another possible communication system to which the embodiments of the present application are applicable;

[0051] Figure 3 A schematic diagram exemplarily illustrates a flow chart of a communication method provided in an embodiment of the present application;

[0052] Figure 4 A schematic diagram showing the structure of a communication device provided in an embodiment of the present application is exemplified;

[0053] Figure 5 A schematic diagram showing the structure of another communication device provided in an embodiment of the present application is exemplified;

[0054] Figure 6The following is a schematic diagram showing the structure of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0056] Below, some terms involved in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0057] In the embodiments of the present application, the term "network element" can be interchangeably with "entity" or "device". For example, "AMF network element" can also be written as "AMF entity" or "AMF device", and "SMF network element" can also be written as "SMF entity" or "SMF device". For the convenience of description below, "XXX network element" is uniformly abbreviated as "XXX", for example, "AUSF network element" can also be abbreviated as "AUSF", and "SMF network element" can also be abbreviated as "SMF".

[0058] It should be understood that the various network elements shown in the terms in the embodiments of the present application may be physical concepts, for example, a single device physically, or at least two network elements may be integrated on the same physical device, or the network elements shown in this document may be logical concepts, such as software modules or network functions corresponding to the services provided by each network element. The network function may be understood as a virtualization function under virtualization implementation, and may also be understood as a network function that provides services under a service-oriented architecture.

[0059] In the embodiments of the present application, the number of nouns, unless otherwise specified, means "singular noun or plural noun", that is, "one or more". "At least one" means one or more, and "plural" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. For example, A / B means: A or B. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

[0060] Furthermore, unless otherwise stated, ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects and are not used to limit the order, timing, priority or importance of multiple objects. In addition, the terms "including" and "having" in the embodiments of the present application, the claims and the drawings are not exclusive. For example, a process, method, system, product or device that includes a series of steps or modules is not limited to the listed steps or modules, and may also include steps or modules that are not listed.

[0061] like Figure 1B As shown, in order to prevent signaling storms from occurring in the network, in a technical solution, hierarchical flow control of network elements is constructed and flow control is set in advance at each node of the network. The current network flow control is divided into four lines of defense, and self-protection flow control is set in each line of defense. For the first three lines of defense, flow control for protecting others is also set, mainly to prevent the back-end network elements from causing equipment downtime under the impact of signaling, triggering a larger range of signaling storms. Access flow control is also set for AMF and SMF themselves, the purpose of which is to control the number of messages from the source of the message. In this solution, the network can only adjust itself according to the pre-configured mechanism when a signaling storm occurs, but it cannot predict the upcoming signaling storm in the network based on the characteristics of the signaling received by the network.

[0062] In another technical solution, an analysis is conducted on a group of UEs in the target area, and mainly on the behavior of the UE to determine whether the UE has any abnormality. However, the cause of the abnormality cannot be distinguished. Therefore, it is impossible to determine whether the UE abnormality is caused by an attack on the UE itself or network congestion, and it is impossible to directly conclude that a signaling storm is about to occur in the network based on the abnormality.

[0063] In another technical solution, the abnormality of UE that is inconsistent with the expected behavior of UE is analyzed. The expected behavior of UE mainly refers to the mobility characteristics of UE or the communication characteristics of UE. These analyses are also mainly for UE, rather than the overall UE behavior characteristics of the network. It is impossible to determine whether a signaling storm has occurred in the network based on a single UE or a group of UEs.

[0064] In summary, how to prevent network signaling storms to improve the reliability of communication networks is an issue that needs to be urgently addressed in this field.

[0065] In view of this, the present application provides a communication method, device and system for improving the reliability of a communication network. In the method, the first request received by the network data analysis function network element from the first network element includes the first identifier of the target network element, and then the network data analysis function network element can feedback to the first network element the analysis information of the message received by the target network element and / or the analysis information of the message sent by the target network element. In this way, the first network element can preliminarily judge the behavior characteristics of the user device sending the message and / or the state of the network (such as whether signaling congestion occurs, and then judge the probability of a signaling storm occurring in the network) based on the analysis information of the message received by the target network element and / or the analysis information of the message sent by the target network element, and then the first network element can take corresponding measures to prevent the network signaling storm, thereby effectively improving the reliability of the communication network.

[0066] The technical solutions in the embodiments of the present application can be applied to communication systems of various standards, such as: long term evolution (LTE) communication system, universal mobile telecommunications system (UMTS) system, code division multiple access (CDMA) system, wireless local area network (WLAN), next generation radio access networks (NG-RAN) system, new radio (NR) communication technology, fifth generation (5G) communication system, sixth generation (6G) communication system or other future evolution systems (such as 7G communication system), vehicle to everything (V2X), long term evolution-vehicle network (LTE-vehicle, LTE-V), vehicle to vehicle (V2V), vehicle network, machine type communications (MTC), Internet of things (IoT), long term evolution-machine to machine (LTE-M), machine to machine (machine to machine (M2M), Internet of Things or other wireless communication systems using wireless access technology.

[0067] Figure 2AThis is a schematic diagram of a possible communication system architecture applicable to the embodiments of the present application. In other possible scenarios, the communication system architecture may also include other devices. Figure 2A In the communication system, the first network element and the network data analytics function (NWDAF) network element are included. The first network element can be understood as a network function service consumer (NFc) entity, referred to as "NFc entity" or "NFc". Specifically, it can be a NF that can call functional services in a service-oriented architecture. For example, the first network element can be any one of the following: operations administration management (OAM) network element, access and mobility management function (AMF), policy control function (PCF) network element, session management function (SMF) network element, network repository function (NRF) network element, or application function (AF) network element. The NWDAF network element has a data analysis function, and the first network element can send an analysis request to the NWDAF network element to obtain the corresponding data analysis service.

[0068] In one possible implementation, the first network element may send a first request to the NWDAF network element, where the first request includes a first identifier of the target network element; accordingly, after receiving the first request, the NWDAF network element may perform corresponding analysis on the message received by the target network element and / or the message sent by the target network element, and send a first response to the first network element, where the first response includes analysis information on the message received by the target network element and / or the analysis information on the message sent by the target network element.

[0069] Figure 2B FIG. 1 is a schematic diagram of another possible communication system architecture applicable to the embodiment of the present application. Figure 2AIn the communication system, the second network element and the third network element may also be included. The second network element may be the target network element or other network element that manages the target network element to receive and / or send messages; the third network element may be a network element that manages the operation and maintenance information of network elements in the network, and the target network element is also in the network. Exemplarily, the second network element may be an AMF network element that manages the messages received by the target network element and / or the messages sent by the target network element; the third network element may be, for example, an OAM network element that manages signaling statistics measurement, CPU usage and / or load of the target network element and the fourth network element (i.e., the network element that has information interaction with the target network element).

[0070] Accordingly, in a possible implementation, after receiving the first request from the first network element, since the first request includes the first identifier of the target network element, the NWDAF network element can obtain first information from the second network element, the first information including the type and / or total number of messages received by the target network element, and / or the type and / or total number of messages sent by the target network element; and the NWDAF network element can obtain second information from the third network element, the second information including at least one of the instance identifier of the target network element, signaling statistical measurements, CPU usage of the target network element and / or the fourth network element, or the load of the target network element and / or the fourth network element; then, the NWDAF network element can determine a first response based on the first information and the second information, and send the first response to the first network element, the first response including analysis information of the message received by the target network element and / or analysis information of the message sent by the target network element.

[0071] Among them, the target network element can be, for example, at least one of an AMF network element, a PCF network element, a unified data management (UDM) network element, a user plane function (UPF) or a session management function (SMF) network element.

[0072] For example, Figure 2C A specific communication system applicable to the embodiments of the present application includes a terminal device, a radio access network (RAN), and a core network (CN).

[0073] The terminal device may include, for example, a handheld device with a wireless connection function, or a processing device connected to a wireless modem. The terminal device may include a user equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device (D2D) terminal device, a V2X terminal device, a machine-to-machine / machine-type communications (M2M / MTC) terminal device, an Internet of Things (IoT) terminal device, a subscriber unit, a subscriber station, a mobile station, a remote station, an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, or a user device, etc. For example, it may include a mobile phone (or a "cellular" phone), a computer with a mobile terminal device, a portable, pocket-sized, handheld, or computer-built-in mobile device, etc. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA), and other devices. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capacity, or devices with limited computing power. For example, it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), laser scanners, etc. Figure 2C In the present invention, the terminal device takes UE as an example, and UE can communicate with CN via RAN and exchange voice and / or data with RAN.

[0074] As an example but not limitation, in the embodiment of the present application, the terminal device can also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc., which are the general term for the intelligent design of daily wearables and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, etc., as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets, smart helmets, and smart jewelry for vital sign monitoring. The various terminal devices introduced above, if located on a vehicle (for example, placed in a vehicle or installed in a vehicle), can be considered as vehicle-mounted terminal devices, and vehicle-mounted terminal devices are also called on-board units (OBU).

[0075] The above-mentioned RAN is mainly responsible for the access of UE. The RAN device is a device located on the network side of the above-mentioned communication system and has wireless transceiver functions or a chip that can be set in the device. The access network equipment includes but is not limited to: evolved node B (eNB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved nodeB, or home nodeB, HNB), baseband unit (BBU), access point (AP) in (wireless fidelity, Wi-Fi) system, wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or Transmission Point, TP), etc., and can also be 5G, such as gNB in ​​new radio (NR) system, or transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or, it can also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc.

[0076] As a bearer network, CN provides an interface to the data network (DN), provides communication connection, authentication, management, policy control and data service bearing for terminal devices. The above-mentioned CN may include one or more CN devices. Among them, the CN device may be a network element for executing the above-mentioned single network function, or a network element for executing the above-mentioned multiple network functions. In the case where a CN device is used to execute the above-mentioned multiple network functions, the CN device may include one or more functional modules for executing the above-mentioned multiple network functions, and the functional module may be a software module or a hardware and software module, which is not limited in the embodiments of the present application. Taking the 5G system as an example, CN may include the following network elements: network exposure function (NEF) network element, NRF network element, NWDAF network element, AF network element, PCF network element, unified data repository (UDR) network element, UDM network element, OAM network element, AMF network element, SMF network element, binding support function (BSF) network element, UPF network element, etc.

[0077] The core network elements involved in the embodiments of the present application are introduced below.

[0078] Among them, the NWDAF network element is used to analyze the data provided by the 5G core network function (5GC NF) and the OAM network element. The 5GC NF or OAM network element can send an analysis request to the NWDAF network element. After receiving the analysis request, the NWDAF network element can collect data from relevant network elements and train artificial intelligence (AI) models. Finally, the AI ​​model is used for data reasoning, and the reasoning results are fed back to the corresponding 5GC NF or OAM network element. According to different functions, NWDAF can be divided into NWDAF that supports training (i.e. NWDAF (MTLF)) and NWDAF that supports reasoning (i.e. NWDAF (AnLF)). NWDAF (AnLF) can request AI model information from NWDAF (MTLF) for data reasoning.

[0079] OAM network elements are responsible for the operation, management and maintenance of network elements in 5GC. They can collect measurement data of network elements in 5GC, including signaling measurement, data measurement and general network element measurement.

[0080] The AMF network element is responsible for managing and controlling the access, mobility, session, and policy control of user equipment.

[0081] SMF network element is responsible for managing and controlling user equipment sessions, policy control, user plane routing, data transmission control, etc.

[0082] The PCF network element is responsible for formulating and executing network policies to control user device access, service quality, resource allocation, etc., thereby ensuring the effective use of network resources and efficient communication of user devices.

[0083] NRF network element is responsible for NF automation management, selection and expansion, including NF service registration, discovery, status monitoring, service authorization, etc., to achieve on-demand configuration of network functions and services and interconnection between NFs. For example, NRF has the functions of generating tokens and verifying tokens.

[0084] AF network element is responsible for policy control, QoS guarantee, application classification and other functions of specific applications to ensure that user equipment can obtain high-quality communication services according to application requirements.

[0085] The UPF network element is responsible for processing the actual data transmission between user devices and services. It also undertakes functions such as data policy processing, QoS control, and data path management to ensure that user devices obtain efficient and stable communication services in the 5G network.

[0086] It should be noted that the above-mentioned NWDAF, AMF, SMF, AUSF, UDM, NEF, PCF, AF, NSSF, etc. can interact using service-oriented interfaces. Figure 2C As shown in the figure, Namf, Nsmf, Nausf, Nudm, Nnef, Npcf, Naf, Nnssf and Nnrf are the service interfaces presented by AMF, SMF, AUSF, UDM, NEF, PCF, AF, NSSF and NRF respectively; N2 is the service interface between RAN and AMF; N3, N4 and N6 are the service interfaces between RAN, SMF, DN and UPF respectively.

[0087] Figure 2A The first network element in the Figure 2C Any one of AMF, SMF, NRF, PCF, AF, etc.; Figure 2A The NWDAF network element in the Figure 2C NWDAF in.

[0088] The communication method provided in the embodiments of the present application is described below with reference to the accompanying drawings.

[0089] See also Figure 3 , Figure 3 A schematic diagram of a communication method provided in an embodiment of the present application, which can be applied to Figure 2A-2CThe communication system shown in the figure, the communication method includes the following process:

[0090] S301: A first network element sends a first request to an NWDAF network element, where the first request includes a first identifier of a target network element. Correspondingly, the NWDAF network element receives the first request.

[0091] S302: The NWDAF network element sends a first response to the first network element, where the first response includes analysis information of a message received by the target network element and / or analysis information of a message sent by the target network element. Correspondingly, the first network element receives the first response.

[0092] In the embodiment of the present application, the first request may also be referred to as any one of an analysis subscription request, a subscription request, or an analysis request, and the first response is a response message corresponding to the first request. The information carried by the first request and the first response is described in detail below.

[0093] In the embodiment of the present application, the first request may include but is not limited to at least one of the following information:

[0094] 1) The first identifier of the target network element.

[0095] In an embodiment of the present application, the first identifier of the target network element may include one or more of a network function instance identifier (NF instance ID) corresponding to the target network element, a network function instance identifier list (NF instance ID list) corresponding to the target network element, a target area corresponding to the target network element, or a network element type corresponding to the target network element. Among them, the target network element is one or more network elements to be analyzed, and accordingly, the first identifier of the target network element may be an instance identifier of a network element to be analyzed, or the first identifier of the target network element may be a list of instance identifiers corresponding to multiple network elements to be analyzed, or the first identifier of the target network element may be a target area where one or more network elements to be analyzed are located, or the first identifier of the target network element may be a network element type corresponding to one or more network elements to be analyzed.

[0096] For example, when the target network element is an AMF network element, the first identifier of the target network element may include at least one of the following: the network function instance identifier of the AMF network element, the target area where the AMF network element is located, or the network element type of the target network element is set to AMF.

[0097] For example, when the target network element is multiple AMF network elements, the first identifier of the target network element may include at least one of the following: a list of network function instance identifiers of the multiple AMF network elements, the target area where the multiple AMF network elements are located, or the network element type of the target network element is set to AMF.

[0098] For another example, when the target network element is an AMF network element and an SMF network element, the first identifier of the target network element may include at least one of the following: a list of network function instance identifiers of the AMF network element and the SMF network element, the target area where the AMF network element and the SMF network element are located, or the network element type of the target network element is set to AMF and SMF.

[0099] 2) The first condition.

[0100] In the embodiment of the present application, the first condition may be understood as a condition for the NWDAF network element to feed back a first response to the first network element, and the first condition may also be included in the filter information of the analysis report (analytics report filter).

[0101] In the embodiment of the present application, the first condition may include but is not limited to one or more of the following situations:

[0102] Case 1: The first condition is that the first parameter corresponds to the first value.

[0103] In case 1, the first parameter may include, for example, the reason why the target network element sends the rejection message and / or the message type corresponding to the rejection message sent by the target network element.

[0104] For example, the first parameter is the reason why the target network element sends the rejection message, and the first value is a network failure. Then the first condition may include: the reason why the target network element sends the rejection message is a network failure.

[0105] For another example, the first parameter is a message type corresponding to the rejection message sent by the target network element, and the first value is a session request message. The first condition may include: the type of the rejection message sent by the target network element is a session request message.

[0106] For example, the first parameter includes the reason why the target network element sends the rejection message and the message type corresponding to the rejection message sent by the target network element, and the first value is a network failure and a session request message. The first condition may include: the reason why the target network element sends the rejection message is a network failure, and the type of the rejection message sent by the target network element is a session request message.

[0107] Case 2: The first condition is that the first value corresponding to the first parameter is greater than or equal to the first threshold.

[0108] In case 2, the first parameter may include, for example, one or more of the following: the total number of messages received by the target network element, the total number of messages rejected by the target network element, the total number of messages sent by the target network element, the total number of rejection messages sent by the target network element, the failure rate of the request message, the total number of rejection messages corresponding to the first reason sent by the target network element, the total number of rejection messages corresponding to the first message type sent by the target network element, or the total number of rejection messages corresponding to the first message type sent by the target network element. The first threshold may include one or more thresholds, and the value of each of the one or more thresholds may be the same or different. The message rejected by the target network element is the message of the failed request.

[0109] For example, the first parameter takes the total number of messages received by the target network element as an example, the first value corresponding to the first parameter is the specific numerical value corresponding to the total number of messages received by the target network element, and the first threshold takes 10000 as an example. Then the first condition may include: the specific numerical value corresponding to the total number of messages received by the target network element within a unit time or within the first time period is greater than or equal to 10000.

[0110] For another example, the first parameter takes the total number of messages rejected by the target network element as an example, the first value corresponding to the first parameter is the specific numerical value corresponding to the total number of messages rejected by the target network element, and the first threshold takes 1000 as an example. Then the first condition may include: the specific numerical value corresponding to the total number of messages rejected by the target network element in unit time or in the first time period is greater than or equal to 1000.

[0111] For another example, the first parameter takes the total number of messages sent by the target network element as an example, the first value corresponding to the first parameter is the specific numerical value corresponding to the total number of messages sent by the target network element, and the first threshold takes 10000 as an example. Then the first condition may include: the total number of messages sent by the target network element in unit time or in the first time period is greater than or equal to 10000.

[0112] For another example, the first parameter takes the total number of rejection messages sent by the target network element and the failure rate of the request messages as examples, and the first value corresponding to the first parameter is the specific numerical value corresponding to the total number of rejection messages sent by the target network element and the specific numerical value corresponding to the failure rate of the request messages; the first threshold takes 100 and 30% as examples, then the first condition may include: the specific numerical value corresponding to the total number of rejection messages sent by the target network element within a unit time or within the first time period is greater than or equal to 100, and the specific numerical value corresponding to the failure rate of the request messages is greater than or equal to 30%.

[0113] For another example, the first parameter takes the total number of rejection messages corresponding to the first reason sent by the target network element as an example, the first value corresponding to the first parameter is the specific numerical value corresponding to the total number of rejection messages corresponding to the first reason sent by the target network element, the first threshold takes 1000 as an example, and the first reason takes network failure as an example, then the first condition may include that the total number of rejection messages sent by the target network element within a unit time or within the first time period due to network failure is greater than or equal to 1000.

[0114] For another example, the first parameter takes the total number of rejection messages of the first message type sent by the target network element as an example, the first value corresponding to the first parameter is the specific numerical value corresponding to the total number of rejection messages of the first message type sent by the target network element, the first threshold takes 1000 as an example, and the first message type takes a registration request message as an example, then the first condition may include: the total number of rejection messages of the registration request message type sent by the target network element within a unit time or a first time period is greater than or equal to 1000.

[0115] Case 3: the first value corresponding to the first parameter is less than or equal to the first threshold.

[0116] In case 3, the first parameter may include, for example, one or more of the following: the time taken by the target network element to receive a fixed number of messages, the message accepted by the target network element, the total number of consent messages sent by the target network element, or the success rate of the request message. The first threshold may include one or more thresholds, and the value of each of the one or more thresholds may be the same or different. The message accepted by the target network element is the message of the successful request.

[0117] For example, the first parameter takes the time taken by the target network element to receive a fixed number of messages as an example. The first value corresponding to the first parameter is a specific numerical value corresponding to the time taken by the target network element to receive the fixed number of messages. The fixed number is 10,000 as an example. The first threshold includes a time threshold of 30s corresponding to the time taken by the target network element to receive 10,000 messages. The first condition can be that the specific numerical value corresponding to the time taken by the target network element to receive 10,000 messages is less than or equal to 30.

[0118] For another example, the first parameter takes the total number of messages accepted by the target network element as an example, the first value corresponding to the first parameter is the specific numerical value corresponding to the total number of messages accepted by the target network element, the first threshold takes 500 as an example, and the first condition can be that the specific numerical value corresponding to the total number of messages accepted by the target network element within a unit time or within the first time period is less than or equal to 500.

[0119] For another example, the first parameter takes the total number of consent messages sent by the target network element and the success rate of the request messages as an example, and the first value corresponding to the first parameter is the specific numerical value corresponding to the total number of consent messages sent by the target network element and the specific numerical value corresponding to the success rate of the request messages; the first threshold takes 100 and 10% as examples, and the first condition may include: the specific numerical value corresponding to the total number of consent messages sent by the target network element within a unit time or within the first time period is less than or equal to 100, and the specific numerical value corresponding to the success rate of the request messages is less than or equal to 10%.

[0120] It should be understood that a message accepted by the target network element is a message of successful request, and a message rejected by the target network element is a message of failed request. The first time period may include one or more time periods, and the duration corresponding to each time period may be, for example, 5 minutes, 10 minutes, 30 minutes, etc., which is not specifically limited in the embodiments of the present application.

[0121] 3) The first time window.

[0122] In the embodiment of the present application, the first time window can be understood as one or more time periods. The one or more time periods are used to determine the second time period in which the target network element receives a message and / or the target network element sends a message. Among them, the above-mentioned second time period may include one or more time periods, and the duration corresponding to the second time period may be, for example, 10 minutes, 30 minutes, etc., and the embodiment of the present application does not impose specific restrictions. For example, when the duration corresponding to the second time period is 30 minutes, the NWDAF network element can count the messages received by the target network element and / or the messages sent by the target network element every 30 minutes.

[0123] Further, the second time period may be used to determine the time used for statistical analysis of the target network element receiving messages and / or the target network element sending messages. In a possible case, the second time period may include the above-mentioned first time period.

[0124] For example, the duration corresponding to the second time period is 30 minutes, and the second time period is 11:00-11:30; the duration corresponding to the first time period is 10 minutes, and the first time period is 11:00-11:10; the NWDAF network element can count the total number of messages received by the target network element and / or the total number of messages sent by the target network element within 11:00-11:30, but the NWDAF network element only analyzes the messages received by the target network element and / or the messages sent by the target network element within 11:00-11:10.

[0125] For example, the duration corresponding to the second time period is 30 minutes, and the second time period is 11:00-11:30; the duration corresponding to the first time period is 30 minutes, and the first time period is 11:00-11:10; the NWDAF network element can count the total number of messages received by the target network element and / or the total number of messages sent by the target network element within 11:00-11:30, and analyze the total number of messages received by the target network element and / or the total number of messages sent by the target network element within 11:00-11:30.

[0126] In the embodiment of the present application, the first response may include but is not limited to at least one of the following information:

[0127] 1) Analysis information of the message received by the target network element.

[0128] In an embodiment of the present application, the analysis information of the message received by the target network element includes statistical information 1. The statistical information 1 may include, for example, at least one of a specific value corresponding to a parameter, a specific value corresponding to a parameter being within a first value interval, a specific value corresponding to a parameter being greater than or equal to a first value, or a specific value corresponding to a parameter being less than or equal to the first value.

[0129] In a possible implementation, the statistical information 1 may include but is not limited to one or more of the following information indicated by A1-A5.

[0130] A1. The total number of messages received by the target network element.

[0131] For example, if the target network element is AMF, statistical information 1 may include the total number of messages received by AMF. For another example, if the target network element is AMF and SMF, statistical information 1 may include the total number of messages received by AMF and SMF, the total number of messages received by AMF, and the total number of messages received by SMF.

[0132] In this way, by counting the total number of messages received by the target network element, the NWDAF network element or the first network element can determine whether there is a risk of a network signaling storm in the communication network according to the total number of messages received by the target network element.

[0133] Optionally, statistical information 1 may also include the total number of messages accepted by the target network element, the number interval to which the total number of messages accepted by the target network element belongs, the message types corresponding to the messages accepted by the target network element, and the proportion of messages accepted by the target network element to the messages received by the target network element; and statistical information 1 may also include the total number of messages rejected by the target network element, the number interval to which the total number of messages rejected by the target network element belongs, the message types corresponding to the messages rejected by the target network element, and the proportion of messages rejected by the target network element to the messages received by the target network element.

[0134] For example, taking AMF as an example, statistical information 1 may include the total number of messages accepted by AMF, the number interval to which the total number of messages accepted by AMF belongs, the message types corresponding to the messages accepted by AMF, and the proportion of messages accepted by AMF in the messages received by AMF; and, statistical information 1 may also include the total number of messages rejected by AMF, the number interval to which the total number of messages rejected by AMF belongs, the message types corresponding to the messages rejected by AMF, and the proportion of messages rejected by AMF in the messages received by AMF.

[0135] For another example, taking AMF and SMF as target network elements, statistical information 1 may include the total number of messages accepted by AMF, the number interval to which the total number of messages accepted by AMF belongs, the message type corresponding to the messages accepted by AMF, the proportion of messages accepted by AMF in the messages received by AMF, the total number of messages accepted by SMF, the number interval to which the total number of messages accepted by SMF belongs, the message type corresponding to the messages accepted by SMF, the proportion of messages accepted by SMF in the messages received by SMF, the total number of messages accepted by AMF and SMF, the number interval to which the total number of messages accepted by AMF and SMF belongs, the message type corresponding to the messages accepted by AMF and SMF, and the proportion of messages accepted by AMF and SMF in the messages received by AMF and SMF and, statistical information 1 may also include the total number of messages rejected by AMF, the number interval to which the total number of messages rejected by AMF belongs, the message types corresponding to the messages rejected by AMF, the proportion of messages rejected by AMF to the messages received by AMF, the total number of messages rejected by SMF, the number interval to which the total number of messages rejected by SMF belongs, the message types corresponding to the messages rejected by SMF, the proportion of messages rejected by SMF to the messages received by SMF, the total number of messages rejected by AMF and SMF, the number interval to which the total number of messages rejected by AMF and SMF belongs, the message types corresponding to the messages rejected by AMF and SMF, and the proportion of messages rejected by AMF and SMF to the messages received by AMF and SMF.

[0136] A2. The total number of messages corresponding to the first message type received by the target network element.

[0137] The first message type may include at least one of a registration request message, a session request message, and a service request message. The registration request message may be, for example, at least one of an initial registration request, a periodic registration request, an emergency registration request, or a mobility registration update request. The session request message may be, for example, at least one of a protocol data unit (PDU) session establishment request, a quality of service (QoS) flow establishment request, or a paging request. The service request message may be, for example, at least one of an identity authentication request, an access request, a resource request, and the like.

[0138] In this way, by counting the total number of messages corresponding to the first message type received by the target network element, the NWDAF network element or the first network element can determine whether there is a risk of a network signaling storm in the first message type dimension based on the total number of messages corresponding to the first message type received by the target network element. For example, when the NWDAF network element feeds back to the first network element that the total number of registration request messages received by the target network element in a certain analysis time period exceeds 5000, the first network element believes that the target network element is at risk of generating a network signaling storm.

[0139] Optionally, the statistical information 1 may also include the total number of messages corresponding to the first message type accepted by the target network element, and the total number of messages corresponding to the first message type rejected by the target network element.

[0140] A3: The total number of messages received by the target network element in the first time period.

[0141] In this way, by counting the total number of messages received by the target network element in the first time period, the NWDAF network element or the first network element can determine whether the communication network has a risk of a network signaling storm in the first time period according to the total number of messages received by the target network element in the first time period. The first time period can be, for example, 5 minutes, 10 minutes, etc., and the embodiment of the present application does not impose specific restrictions. The first time period can be the same as or different from the time period included in the first time window.

[0142] Optionally, the statistical information 1 may include the total number of messages accepted by the target network element in the first time period and / or the total number of messages rejected by the target network element in the first time period.

[0143] A4. The total number of messages corresponding to the first message type received by the target network element within the first time period.

[0144] In this way, by counting the total number of messages corresponding to the first message type received by the target network element within the first time period, the NWDAF network element or the first network element can judge whether there is a risk of network signaling storm within the first time period in the first message type dimension based on the total number of messages corresponding to the first message type received by the target network element.

[0145] A5. The total number of messages of the first message type initiated within the first time period is greater than the total number of devices of the first number.

[0146] In this way, by counting the total number of devices that initiate messages of the first message type in the first time period greater than the first number, the first network element can analyze the device with abnormal behavior. The device here can be a UE and / or a network element, and the embodiment of the present application does not make specific restrictions.

[0147] For example, the first time period is 1 minute and the first number is 50. The information shown in B3 is the total number of UEs that send more than 50 messages of the first message type to the target network element within 1 minute.

[0148] For another example, the first time period is 5 minutes and the first number is 50, then the information shown in B3 is the total number of network elements that send more than 50 messages of the first message type to the target network element within 5 minutes.

[0149] For another example, taking the first time period as 10 minutes and the first number as 50, the information shown in B3 is the total number of UEs and network elements that send more than 50 messages of the first message type to the target network element within 10 minutes.

[0150] 2) Analysis information of the message sent by the target network element.

[0151] In an embodiment of the present application, the analysis information of the message sent by the target network element includes statistical information 2, which may, for example, include at least one of a specific numerical value corresponding to a certain parameter, a specific numerical value corresponding to a certain parameter being within a first numerical range, a specific numerical value corresponding to a certain parameter being greater than or equal to a first numerical value, or a specific numerical value corresponding to a certain parameter being less than or equal to the first numerical value.

[0152] In a possible implementation, the statistical information 2 may include but is not limited to one or more of the following information indicated by B1-B6.

[0153] B1. The total number of messages sent by the target network element.

[0154] In this way, by counting the total number of messages sent by the target network element, the first network element or the NWDAF network element can determine whether there is a risk of a network signaling storm in the communication network according to the total number of messages sent by the target network element.

[0155] For example, when the total number of messages sent by the target network element to the fourth network element within a unit time or a first time period exceeds 10,000, the first network element may believe, based on information fed back by the NWDAF network element, that the fourth network element is congested or at risk of causing a network signaling storm, or the NWDAF network element believes that the fourth network element is congested or at risk of causing a network signaling storm.

[0156] B2. The total number of messages corresponding to the first message type sent by the target network element.

[0157] In this way, by counting the total number of messages corresponding to the first message type sent by the target network element, the first network element or NWDAF network element can judge whether there is a risk of network signaling storm in the first message type dimension based on the total number of messages corresponding to the first message type sent by the target network element.

[0158] For example, when the total number of registration request messages sent by the target network element to the fourth network element per unit time or in the first time period exceeds 5000, the first network element may, based on the information fed back by the NWDAF network element, believe that the target network element is congested or is at risk of causing a network signaling storm, or the NWDAF network element may believe that the fourth network element is congested or is at risk of causing a network signaling storm.

[0159] B3. The total number of response messages sent by the target network element.

[0160] The response message sent by the target network element may be, for example, a response message of at least one of a registration request message, a session request message, or a service request message. The response message includes an acceptance response message and / or a rejection response message, wherein the acceptance response is used to indicate that a certain request message is accepted by the target network element, and the rejection response message is used to indicate that a certain request message is rejected by the target network element.

[0161] Optionally, statistical information 2 may also include at least one of the following: the total number of acceptance response messages sent by the target network element, the proportion of acceptance response messages sent by the target network element in the response messages it sends, the total number of rejection response messages sent by the target network element, or the proportion of rejection response messages sent by the target network element in the response messages it sends. In this way, the first network element can determine whether there is a risk of a signaling storm in the network based on the information fed back by the NWDAF network element or the NWDAF network element can determine whether there is a risk of a signaling storm in the network based on the statistical information related to the acceptance response messages and / or rejection response messages sent by the target network element.

[0162] B4. The total number of response messages corresponding to the first message type sent by the target network element.

[0163] Among them, for the first message type, please refer to the relevant description in the previous text and will not be repeated here.

[0164] B5. Reason corresponding to the response message sent by the target network element.

[0165] The response message sent by the target network element includes a rejection message sent by the target network element, and accordingly, the reason corresponding to the response message sent by the target network element can be understood as the reason why the target network element sends the rejection message. The reason why the target network element sends the rejection message may include but is not limited to at least one of the following: network congestion, expiration of UE's contract information, UE arrears, UE is restricted from accessing a specific area, etc.

[0166] B6. The total number of response messages corresponding to the first cause sent by the target network element.

[0167] The first reason may be one or more reasons. The first reason may include but is not limited to at least one of the following: network congestion, expiration of UE subscription information, UE arrears, UE being restricted from accessing a specific area, etc.

[0168] For example, the first reason may be a network failure; or in another example, the first reason may be a network failure and an illegal UE.

[0169] In combination with the information indicated by any one of items B1-B6, the first network element or the NWDAF network element may determine whether there is a risk of a network signaling storm in the communication network based on statistical information related to the response message sent by the target network element.

[0170] Optionally, the statistical information 2 may also include at least one of the following information shown in C1-C3. The information shown in C1-C3 is information of the target network element dimension. Thus, by counting the information of the target network element dimension, the first network element or the NWDAF network element can analyze the information of the target network element dimension, which helps the first network element to adjust the strategy in the network element dimension to prevent the occurrence of network signaling storms.

[0171] C1. Type of target network element.

[0172] For example, the type of the target network element may include types corresponding to SMF and / or AMF.

[0173] C2: Instance ID of the target network element.

[0174] For example, the instance identifier of the target network element may include the network function instance identifier corresponding to the SMF and / or AMF.

[0175] C3: CPU usage of the target network element.

[0176] For example, the CPU usage of the target network element may include the CPU usage of the SMF and / or AMF.

[0177] 3) Valid time.

[0178] The valid time is used to indicate the validity period of the first response, and the valid time may be, for example, 10 minutes, 30 minutes, etc.

[0179] 4) The probability of a network signaling storm occurring in the first time period.

[0180] The probability of a network signaling storm occurring in the first time period is used to characterize a trend of a network signaling storm occurring in the first time period.

[0181] 5) Confidence.

[0182] The confidence level is used to represent the credibility of the probability of a signaling storm occurring in the first time period.

[0183] 6) The difference between the total number of messages received by the target network element in two adjacent cycles.

[0184] Among them, one cycle can be considered as a time period, and the difference in the total number of messages received by the target network element in two adjacent cycles can be understood as the difference between the total number of messages received by the target network element in the current time period and the total number of messages received in the previous time period.

[0185] As can be seen from the previous description, the first network element can be understood as a network function service consumption entity, and the first network element can be any one of the following: AMF network element, OAM network element, NRF network element, PCF network element, or AF network element.

[0186] In the above S301, after receiving the first request, the NWDAF network element needs to obtain information related to the target network element to determine the above first response. The target network element may include the first network element, or the target network element may not include the first network element. For different situations, the specific implementation methods of the NWDAF network element obtaining information related to the target network element are different, and are introduced below according to different situations.

[0187] Case 1: the target network element is the first network element.

[0188] For example, the first network element is an AMF network element, the target network element is an AMF network element, and the NWDAF network element can obtain first information from the AMF network element, where the first information includes the type and / or total number of messages received by the AMF, and / or the type and / or total number of messages sent by the AMF. And, the NWDAF network element can determine the above-mentioned first response based on the first information. Optionally, the first information may also include the UE identifier, the frequency at which the UE initiates registration requests, the frequency at which the UE initiates service requests, the frequency at which the UE initiates PDU session requests, the result of the registration request and the corresponding reason value as shown in Table 1.

[0189] Table 1

[0190]

[0191] Case 2: the target network element includes the first network element.

[0192] For example, if the first network element is an AMF network element, then the target network elements are the AMF network element and the SMF network element, and the NWDAF network element can obtain the first information from the AMF network element, and the first information includes the type and / or total number of messages received by the AMF, and / or the type and / or total number of messages sent by the AMF, the type and / or total number of messages received by the SMF, and / or the type and / or total number of messages sent by the SMF. And the NWDAF network element can determine the above-mentioned first response based on the first information.

[0193] For another example, the first network element is an AMF network element, and the target network elements are an AMF network element and an SMF network element. The NWDAF network element can obtain first information from the AMF network element, and the first information includes the type and / or total number of messages received by the AMF, and / or the type and / or total number of messages sent by the AMF, the type and / or total number of messages received by the SMF, and / or the type and / or total number of messages sent by the SMF. Also, the NWDAF network element can obtain second information from a third network element, and the second information includes at least one of the instance identifier of the AMF network element, signaling statistical measurements, CPU utilization rates of the AMF network element and the SMF network element, or loads of the AMF network element and the SMF network element. The third network element can be, for example, an OAM network element. Furthermore, the NWDAF network element can determine the above-mentioned first response based on the first information and the second information.

[0194] Among them, the signaling statistical measurement is the performance measurement of the OAM network element. Exemplarily, the second information obtained by the NWDAF network element from the OAM network element can be as shown in Table 2 (taking the signaling measurement of RAN and AMF as an example, it can also include the performance measurement of other network elements, such as SMF / UDM, etc., which are not listed one by one). The measurement data of RAN include the number of attempts to establish RRC connection (attempted RRC connection establishments), the number of successful RRC connection establishments (successful RRC connection establishments), the number of failed RRC connection establishments (Failed RRC connection establishments), the number of attempts to re-establish RRC connection (Number of RRC connection re-establishment attempts), the number of successful RRC connection establishment after re-establishment of RRC connection attempts (Number ofRRC connection re-establishment attempts followed by RRC Setup), the number of successful RRC connection re-establishment without user equipment (UE) context information (Successful RRC connection re-establishment without UE context), the number of registered users (number of registered subscribers), the number of successful initial registrations (Number of (successful) initial registrations), the number of successful mobility registration update requests (Number of (successful) mobility registration update requests), the number of successful periodic registration update requests (Number of (successful) periodic registration update requests), the average time of the registration process (Mean time of Registration procedure), total number of attempted / successful service requests, number of (successful) 5G paging procedures, CPU usage of AMF and GNodeB, and load of AMF and GNodeB.

[0195] Table 2

[0196]

[0197] Case 3: the target network element does not include the first network element.

[0198] For example, the target network element is an SMF network element, and the NWDAF network element can obtain the first information from the second network element, and the first information includes the type and / or total number of messages received by the SMF network element, and / or the type and / or total number of messages sent by the SMF network element. And, the NWDAF network element can obtain the second information from the third network element, and the second information includes at least one of the instance identifier of the SMF network element, signaling statistics measurement, CPU utilization of the SMF network element and the fourth network element, or the load of the SMF network element and the fourth network element. Among them, the second network element can be, for example, an AMF network element, the third network element can be, for example, an OAM network element, and the fourth network element can be, for example, a UDM network element or a PCF network element. Furthermore, the NWDAF network element can determine the above-mentioned first response based on the first information and the second information. For example, the NWDAF network element can determine whether the SMF network element or the PCF network element is congested or has the risk of causing a network signaling storm based on the total number of messages received by the SMF network element and the load of the SMF network element and the PCF network element.

[0199] In the above S302, the NWDAF network element sends a first response to the first network element, including but not limited to the following situations:

[0200] In case 1, the first request includes the first time window, and the NWDAF network element performs statistical analysis on the message received by the target network element and / or the message sent by the target network element according to the time corresponding to the first time window, and periodically sends a first response to the first network element according to a preset period. The duration corresponding to the first time window is greater than or equal to the duration corresponding to the preset period.

[0201] For example, the duration corresponding to the first time window is 30 minutes, and the NWDAF network element performs statistical analysis on messages received by the target network element and / or messages sent by the target network element every 30 minutes, and sends a first response to the first network element every 30 minutes.

[0202] For another example, the duration corresponding to the first time window is 30 minutes, and the NWDAF network element performs statistical analysis on the messages received by the target network element and / or the messages sent by the target network element every 30 minutes, and sends a first response to the first network element every 29 minutes.

[0203] Case 2: the above-mentioned first request includes a first condition, and the NWDAF may send a first response to the first network element when the first condition is met.

[0204] For example, the NWDAF network element may send a first response to the first network element when the total number of messages received by the target network element within a unit time or within a first time window is greater than 1000.

[0205] For another example, the NWDAF network element may send a first response to the first network element when the failure rate of the request message is greater than 80%.

[0206] For another example, the NWDAF network element may send a first response to the first network element when the first reason for the failure of the request message is a network failure or an illegal UE.

[0207] For another example, the NWDAF network element may send a first response to the first network element when the number of request message failures caused by a network failure is greater than 100.

[0208] For another example, the NWDAF network element may send a first response to the first network element when the total number of rejection messages sent by the target network element corresponding to the first message type is greater than 100.

[0209] For another example, the NWDAF network element may send a first response to the first network element when the failure rate of the request message is greater than 80% and the reason for the failure of the signaling request is a network failure or an illegal UE.

[0210] Case 3: The first request includes a first time window and a first condition. Accordingly, the NWDAF may send a first response to the first network element according to the preset period when the first condition is met. The duration corresponding to the first time window is greater than or equal to the duration corresponding to the specific period.

[0211] For example, the duration corresponding to the first time window is 30 minutes, and the preset period is 20 minutes. When the first condition is met, the NWDAF network element sends a first response to the first network element every 20 minutes.

[0212] Further, after the first network element receives the first response, it can perform a first operation according to the first response. The first operation is used to prevent a network signaling storm. As can be seen from the foregoing description, the first network element can be any of the following: an AMF network element, an OAM network element, an NRF network element, a PCF network element, or an AF network element. Different first network elements perform different first operations. The following is an introduction to each case.

[0213] Case 1: the first network element is the AMF network element.

[0214] When the first network element is an AMF network element, the AMF network element can adjust the flow control strategy of the AMF network element according to the first response; wherein the flow control strategy includes one or more of the following: adjusting the number of AMFs in the AMF pool that perform signaling interaction with the wireless access device NG-RAN, adjusting the proportion of rejection messages sent by the AMF network element, adjusting the value of the backoff timer carried in the rejection message returned by the AMF network element, or adjusting the number of messages sent by each NG-RAN to the AMF network element. In this way, the AMF network element adjusts the flow control strategy of the AMF network element according to the first response, which can effectively prevent network signaling storms and thus effectively improve the reliability of the communication network.

[0215] For example, the above first response indicates that the number of request messages received by the current AMF exceeds 5000 within the unit time or the first time window, and the number of request messages received by the current AMF exceeds the processing capacity of the current AMF. The current AMF network element can increase the number of AMFs in the AMF pool that perform signaling interaction with the wireless access device NG-RAN. In this way, more AMF network elements in the AMF pool can provide signaling processing capabilities, thereby enhancing the reliability of the network.

[0216] For another example, if the first response indicates that the number of request messages rejected by the AMF exceeds 1000, the proportion of rejection messages returned by the AMF network element can be reduced, and the value of the backoff timer carried in the rejection message returned by the AMF network element can be reduced. In this way, the UEs in the access network can be reduced, so that the UEs can enter the access network in batches, the signaling overhead of the network can be reduced, and the network signaling storm caused by the UE frequently initiating request messages can be prevented.

[0217] For another example, the first response indicates that the number of request messages received by the current AMF within a unit time or within a first time window exceeds 1000, which can reduce the number of messages sent by each NG-RAN to the AMF network element. In this way, the number of request messages to be received by the AMF network element can be reduced, which can effectively prevent network signaling storms and effectively improve the reliability of the communication network.

[0218] Case 2: the first network element is an OAM network element.

[0219] When the first network element is an OAM network element, the OAM network element can adjust the network configuration according to the first response; wherein adjusting the network configuration includes at least one or more of the following: a flow control threshold configured by the network element in the wireless communication network, adjusting the number of AMFs in the AMF pool, adjusting the number of devices with bottleneck processing capabilities in the network, or a routing strategy. In this way, the OAM network element adjusts the network configuration according to the first response, which can effectively prevent network signaling storms and thereby effectively improve the reliability of the communication network.

[0220] For example, when the above-mentioned first response indicates that the number of request messages received by the current target network element AMF exceeds 5000 within a unit time or within the first time window, the OAM network element can reduce the flow control threshold configured by network elements such as the AMF network element, SMF network element, and UDM network element, so that the number of signaling received by the AMF network element and the SMF network element is reduced, thereby effectively preventing network signaling storms and effectively improving the reliability of the communication network.

[0221] For example, when the above-mentioned first response indicates that the number of request messages received by the current target network element AMF exceeds 5000 within a unit time or a first time window, the OAM network element can increase the number of AMFs in the AMF pool, thereby improving the signaling processing capability in the network.

[0222] For example, when the above-mentioned first response indicates that the number of request messages received by the current target network element AMF exceeds 5000 within a unit time or a first time window, the OAM network element can adjust the number of devices with bottleneck processing capabilities in the network, such as adding the device DRA of the signaling transfer point.

[0223] For example, when the above-mentioned first response indicates that the number of request messages received by the current target network element AMF exceeds 5000 within a unit time or a first time window, the OAM network element can adjust the routing of AMF, SMF to DRA, thereby improving the signaling processing capability in the network.

[0224] Case 3: the first network element is an NRF network element.

[0225] When the first network element is a network storage function NRF network element, the NRF network element can adjust the priority of the target network element according to the first response, and the priority of the target network element is the reference information when the NRF network element selects the target network element. In this way, the NRF network element can adjust the priority of the target network element according to the first response, and then the NRF network element can refer to the priority when selecting the target network element, so that the network element selected by the NRF network element will not cause network congestion, and the occurrence of signaling storms caused by signaling congestion of the network element can be prevented, thereby effectively improving the reliability of the communication network.

[0226] For example, the target network element takes SMF as an example. The above first response indicates that when the current AMF receives the PDU session request message from the UE, the AMF sends a network element selection request to the NRF network element to request the NRF to allocate a suitable SMF for the PDU session request. The NRF selects a high-priority SMF and will not select the target network element. In this way, the congestion of the target network element can be alleviated, thereby preventing the occurrence of network signaling storms.

[0227] Case 4: the first network element is a PCF network element.

[0228] When the first network element is a policy control function PCF network element, the PCF network element can adjust the user route selection policy (UE Route Selection Policy, URSP) of UE data transmission or the future background data transfer (backgrounddata transfer, BDT) transmission policy according to the first response. In this way, the UE can avoid the network element where the request message is rejected, thereby effectively preventing the network congestion caused by UE data transmission and future background data transmission, thereby preventing the generation of network signaling storms, and effectively improving the reliability of the network.

[0229] For example, the above first response indicates that the proportion of request failures in the request messages received by the AMF is 70%, then the PCF network element can avoid the AMF network element in the transmission strategy of URSP or future BDT.

[0230] Case 5: the first network element is an AF network element.

[0231] When the first network element is an AF network element, the AF network element may adjust a policy for initiating a service request by the AF network element according to the first response; wherein the policy for the service request includes a time and / or frequency for initiating a service request by the AF.

[0232] For example, the first response indicates that the proportion of request failures in the request message initiated by the AF is 70%, which reduces the duration and / or frequency of the service request initiated by the AF. This can avoid preventing the network from being congested due to the AF's request, prevent the generation or spread of network signaling storms, and effectively improve the reliability of the network.

[0233] Please refer to Figure 4 , is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. Figure 4 As shown, the communication device 400 includes a receiving and transmitting unit 401. The communication device 400 may be a hardware device, a component in a hardware device, or a software module in a hardware device, etc. The communication device 400 may be used to implement the functions of the NWDAF network element mentioned above.

[0234] Among them, the transceiver unit 401 is used to receive a first request from a first network element, and the first request includes a first identifier of a target network element; the transceiver unit 401 sends a first response to the first network element, and the first response includes analysis information of a message received by the target network element and / or analysis information of a message sent by the target network element.

[0235] In one possible design, the communication device 400 also includes a processing unit 402, which is further used to obtain first information from a second network element, the first information including the type and / or total number of messages received by the target network element, and / or the type and / or total number of messages sent by the target network element; and determine the first response based on the first information.

[0236] In one possible design, the processing unit 402 is also used to obtain second information from a third network element, the second information including at least one of an instance identifier of the target network element, a signaling statistical measurement, a CPU usage of the target network element and / or a fourth network element, or a load of the target network element and / or the fourth network element; and the processing unit 402 is specifically used to determine the first response based on the first information and the second information.

[0237] Please refer to Figure 5 , is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. Figure 5 As shown, the communication device 500 includes a transceiver unit 501. The communication device 500 may be a hardware device, a component in a hardware device, or a software module in a hardware device, etc. The communication device 500 may be used to implement the functions of the first network element mentioned above.

[0238] Among them, the transceiver unit 501 is used to send a first request to the network data analysis function network element, and the first request includes a first identifier of the target network element; the transceiver unit 501 is used to receive a first response from the network data analysis function network element, and the first response includes analysis information of the message received by the target network element and / or analysis information of the message sent by the target network element.

[0239] In one possible design, the communication device 500 also includes a processing unit 502. When the first network element is an AMF network element, the processing unit 502 is also used to adjust the flow control strategy of the AMF network element according to the first response; wherein the flow control strategy includes one or more of the following: adjusting the number of AMFs in the AMF pool that perform signaling interaction with the wireless access device NG-RAN, adjusting the proportion of rejection messages returned by the AMF network element, adjusting the value of the backoff timer carried in the rejection message returned by the AMF network element, or adjusting the number of messages sent by each NG-RAN to the AMF network element.

[0240] In one possible design, the communication device 500 also includes a processing unit 502. When the first network element is an OAM network element, the processing unit 502 is also used to adjust the network configuration according to the first response; wherein the network configuration includes at least one or more of the following: flow control thresholds configured for each network element in the wireless communication network, adjustment of the number of AMFs in the AMF pool, adjustment of the number of devices with processing capacity bottlenecks in the network, or routing strategies.

[0241] In one possible design, the communication device 500 also includes a processing unit 502. When the first network element is an NRF network element, the processing unit 502 is also used to adjust the priority of the target network element according to the first response, and the priority of the target network element is reference information when the NRF network element selects the target network element.

[0242] In one possible design, the communication device 500 also includes a processing unit 502. When the first network element is a PCF network element, the processing unit 502 is further used to adjust the routing selection strategy URSP or future background data transmission strategy for UE data transmission according to the first response.

[0243] In one possible design, the communication device 500 also includes a processing unit 502. When the first network element is an AF network element, the processing unit 502 is further used to adjust the strategy of the AF initiating a service request according to the first response; wherein the service request strategy includes the time and / or frequency of the AF initiating the service request.

[0244] Please refer to Figure 6 , is a structural diagram of a communication device provided in an embodiment of the present application.

[0245] like Figure 6 As shown, the communication device 600 includes a processor 601 and a communication interface 602. The processor 601 and the communication interface 602 are coupled to each other, or are relatively independently designed. The communication interface 602 can be, for example, a transceiver or an input / output interface. The processor 601 and the communication interface 602 can implement the method described above.

[0246] Optionally, the communication device 600 may further include a memory 603 for storing instructions executed by the processor 601 or storing input data required for the processor 601 to run instructions or storing data generated after the processor 601 runs instructions.

[0247] Among them, any two of the processor 601, the communication interface 602 and the memory 603 can communicate with each other through the bus 604. The bus 604 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc.

[0248] It is understandable that the processor 601 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor. The memory 603 can include volatile memory, such as random access memory (RAM). The memory can also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD) or solid state drive (SSD).

[0249] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0250] The present application is described with reference to the flowchart and / or block diagram of the method, device (system), and computer program product according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the process and / or box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the function specified in one process or multiple processes in the flowchart and / or one box or multiple boxes in the block diagram.

[0251] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0252] These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0253] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: The method comprises: receiving a first request from a first network element, wherein the first request includes a first identifier of a target network element; A first response is sent to the first network element, where the first response includes analysis information of a message received by the target network element and / or analysis information of a message sent by the target network element.

2. The method according to claim 1, characterized in that The analysis information of the message received by the target network element includes at least one statistical information.

3. The method according to claim 2, characterized in that The at least one statistical information includes a total number of messages received by the target network element and / or a total number of messages corresponding to the first message type received by the target network element.

4. The method according to claim 3, characterized in that The at least one statistical information further includes at least one of the following: The total number of messages received by the target network element in the first time period, the total number of messages corresponding to the first message type received by the target network element in the first time period, and the total number of devices that initiate messages of the first message type in the first time period are greater than the first number.

5. The method according to claim 1, characterized in that The analysis information of the message sent by the target network element includes at least one statistical information.

6. The method according to claim 5, characterized in that The at least one statistical information includes a total number of messages sent by the target network element and / or a total number of messages corresponding to the first message type sent by the target network element.

7. The method according to claim 5 or 6, characterized in that: The at least one statistical information further includes at least one of the following: The total number of response messages sent by the target network element, the total number of response messages corresponding to the first message type sent by the target network element, the reasons corresponding to the response messages sent by the target network element, or the total number of response messages corresponding to the first reason sent by the target network element.

8. The method according to any one of claims 1 to 7, characterized in that: The first response also includes at least one of the following: The type of the target network element, the instance identifier of the target network element, or the CPU usage rate of the target network element.

9. The method according to any one of claims 1 to 8, characterized in that: The first request further includes a first condition; wherein the first condition includes at least one of the following: the first parameter corresponds to a first value; the first value corresponding to the first parameter is greater than or equal to a first threshold; or the first value corresponding to the first parameter is less than or equal to the first threshold; Sending the first response to the first network element includes: sending the first response when the first condition is met.

10. The method according to any one of claims 1 to 9, characterized in that: The first request also includes a first time window, which is used to determine a second time period for the target network element to receive a message and / or the target network element to send a message, and the second time period is used to determine the time used for statistical analysis of the messages received by the target network element and / or the messages sent by the target network element.

11. The method according to any one of claims 1 to 10, characterized in that: The method further comprises: Acquire first information from the second network element, where the first information includes the type and / or total number of messages received by the target network element and / or the type and / or total number of messages sent by the target network element; The first response is determined according to the first information.

12. The method according to claim 11, characterized in that The method further comprises: Acquire second information from a third network element, where the second information includes at least one of an instance identifier of the target network element, a signaling statistical measurement, a CPU usage rate of the target network element and / or a fourth network element, or a load of the target network element and / or the fourth network element; wherein the fourth network element is a network element that interacts with the target network element information; Determining the first response according to the first information includes: determining the first response according to the first information and the second information.

13. The method according to any one of claims 1 to 12, characterized in that: The first network element is any one of the following: Mobility management function AMF network element, operation and maintenance management OAM network element, network storage function NRF network element, policy control function PCF network element, or application function AF network element.

14. A communication method, characterized in that: The method comprises: Sending a first request to a network data analysis function network element, wherein the first request includes a first identifier of a target network element; A first response is received from the network data analysis function network element, wherein the first response includes analysis information of a message received by the target network element and / or analysis information of a message sent by the target network element.

15. The method according to claim 14, characterized in that The analysis information of the message received by the target network element includes at least one statistical information.

16. The method according to claim 15, characterized in that The at least one statistical information includes a total number of messages received by the target network element and / or a total number of messages corresponding to the first message type received by the target network element.

17. The method according to claim 16, characterized in that The at least one statistical information further includes at least one of the following: The total number of messages received by the target network element in the first time period, the total number of messages corresponding to the first message type received by the target network element in the first time period, and the total number of devices that initiate messages of the first message type in the first time period are greater than the first number.

18. The method according to claim 14, characterized in that The analysis information of the message sent by the target network element includes at least one statistical information.

19. The method according to claim 18, characterized in that The at least one statistical information includes a total number of messages sent by the target network element and / or a total number of messages corresponding to the first message type sent by the target network element.

20. The method according to claim 18 or 19, characterized in that The at least one statistical information further includes at least one of the following: The total number of response messages sent by the target network element, the total number of response messages corresponding to the first message type sent by the target network element, the reasons corresponding to the response messages sent by the target network element, or the total number of response messages corresponding to the first reason sent by the target network element.

21. The method according to any one of claims 14 to 20, characterized in that: The first response also includes at least one of the following: The type of the target network element, the instance identifier of the target network element, or the CPU usage rate of the target network element.

22. The method according to any one of claims 14 to 21, characterized in that: The first request also includes a first time window, which is used to determine a second time period for the target network element to receive a message and / or the target network element to send a message, and the second time period is used to determine the time used for statistical analysis of the messages received by the target network element and / or the messages sent by the target network element.

23. The method according to any one of claims 14 to 22, characterized in that: When the first network element is an access and mobility management function AMF network element, the method further includes: Adjusting the flow control strategy of the AMF network element according to the first response; Among them, the flow control strategy includes one or more of the following: adjusting the number of AMFs in the AMF pool that perform signaling interaction with the wireless access device NG-RAN, adjusting the proportion of rejection messages returned by the AMF network element, adjusting the value of the backoff timer carried in the rejection message returned by the AMF network element, or adjusting the number of messages sent by each NG-RAN to the AMF network element.

24. The method according to any one of claims 14 to 22, characterized in that: When the first network element is an operation, maintenance and management (OAM) network element, the method further includes: adjusting network configuration according to the first response; Among them, the adjustment of network configuration includes at least one or more of the following: adjusting the flow control threshold configured by each network element in the wireless communication network, adjusting the number of AMFs in the AMF pool, adjusting the number of devices with bottleneck processing capabilities in the network, or routing strategies.

25. The method according to any one of claims 14 to 22, characterized in that: When the first network element is a network storage function NRF network element, the method further includes: According to the first response, the priority of the target network element is adjusted, and the priority of the target network element is reference information when the NRF network element selects the target network element.

26. The method according to any one of claims 14 to 22, characterized in that: When the first network element is a policy control function PCF network element, the method further includes: According to the first response, the routing selection strategy URSP for UE data transmission or the future background data transmission strategy is adjusted.

27. The method according to any one of claims 14 to 22, characterized in that: When the first network element is an application function AF network element, the method further includes: According to the first response, the policy of the AF initiating the service request is adjusted; wherein the policy of the service request includes the time and / or frequency of the AF initiating the service request.

28. A communication device, characterized in that: The method comprises a module or a unit for implementing the method according to any one of claims 1 to 13.

29. A communication device, characterized in that: The method comprises a module or a unit for implementing the method according to any one of claims 14 to 27.

30. A communication device, characterized in that: include: A processor and a communication interface, wherein the communication interface is used to receive signals from other devices outside the communication device and transmit them to the processor or send signals from the processor to other devices outside the communication device, and the processor executes code instructions through a logic circuit to implement the method as described in any one of claims 1 to 13, or implements the method as described in any one of claims 14 to 27.

31. A communication system, characterized in that: Includes the communication device as claimed in claim 28 and the communication device as claimed in claim 29.

32. A computer-readable storage medium, characterized in that: The method comprises a program or an instruction, and when the program or the instruction is run on a computer, the method according to any one of claims 1 to 13 or claims 14 to 27 is executed.

33. A chip system, characterized in that: The invention comprises a processor, wherein the processor is coupled to a memory and is used to read and execute program instructions stored in the memory to implement the method according to any one of claims 1 to 13 or claims 14 to 27.

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