WO2020200057A1

WO2020200057A1 - Communication method and apparatus

Info

Publication number: WO2020200057A1
Application number: PCT/CN2020/081515
Authority: WO
Inventors: 宗在峰
Original assignee: 华为技术有限公司
Priority date: 2019-03-29
Filing date: 2020-03-26
Publication date: 2020-10-08
Also published as: CN111757313A

Abstract

A communication method and apparatus, which are used to improve service performance and improve consumer experience. The method comprises: once a first network element determines that a second network element is in an overload state, determining whether a service network element needs to be reselected, and when the first network element determines that the service network element needs to be reselected, the first network element determining a third network element and sending a service request message to the third network element; or, when the first network element determines that the service network element does not need to be reselected, the first network element reducing the rate at which the service request message is sent to the second network element. By means of the described method, the first network element may flexibly reselect the service network element according to the actual situation, thereby improving the service performance and improving the service experience.

Description

Communication method and device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910252252.6, and the application name is "a communication method and device" on March 29, 2019, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of communication technology, and in particular to a communication method and device.

Background technique

In the existing service-oriented architecture, two network elements that communicate, one can be considered as a consumer (or client), and the other can be considered as a producer (or server). Among them, when the consumer determines that the producer is currently overloaded, or the producer notifies the consumer that the producer is overloaded, the consumer will reduce the rate of sending request messages to the producer, so as to alleviate the overload state of the producer. But in this way, when consumers conduct business, they will have an impact on consumer business, affect business performance, and thereby reduce consumer experience.

Summary of the invention

The present application provides a communication method and device to improve business performance and improve consumer experience.

In the first aspect, this application provides a communication method, which includes:

After the first network element determines that the second network element is in an overloaded state, it determines whether it is necessary to reselect a serving network element. The second network element is the serving network element currently serving the first network element; when the first network element is When the network element determines that the service network element needs to be reselected, the first network element determines the third network element and sends a service request message to the third network element; or, when the first network element determines that reselection is not required When serving the network element, the first network element reduces the rate of sending the service request message to the second network element.

Through the above method, the first network element can flexibly reselect the service network element according to actual conditions, thereby improving service performance and improving service experience.

In a possible design, the first network element determines that the second network element is in an overload state. The specific method may be: after the first network element sends the service request message to the second network element, Receiving an overload indication message from the second network element, where the overload indication message is used to indicate that the second network element is currently in an overload state; or, the first network element obtains the configuration file of the second network element, The first network element determines that the second network element is in an overload state according to the configuration file of the second network element; or, the first network element obtains the configuration of the second network element from a network storage function network element When the file fails, the first network element determines that the second network element is in an overload state.

Through the above method, the first network element can flexibly determine that the current state of the second network element is the overload state in a variety of ways.

In a possible design, the first network element determines that the serving network element needs to be reselected. The specific method may be: the first network element obtains first indication information, and the first indication information is used to indicate the second The second network element supports reselection of the service network element.

Through the above method, the first network element can accurately determine that after the second network element is in an overload state, the network element needs to be re-serviced, so that the reselected serving network element can subsequently provide services.

In a possible design, the first network element obtains the first indication information, and the specific method may be: after the first network element sends a service request message to the second network element, from the second network element The network element receives a rejection message, and the rejection message includes the first indication information; or, the first network element receives a first message from the second network element, and the first message includes the first Indication information; or, the first network element obtains a configuration file of the second network element, and the configuration file of the second network element includes the first indication information.

Through the foregoing method, the first network element can accurately obtain the first indication information, so that the first network element subsequently determines that the serving network element needs to be reselected.

In a possible design, the first indication information is an identifier of a network element set where the second network element is located. In this way, when the first network element obtains the set identifier where the second network element is located, it can be known that the serving network element needs to be reselected after the second network element is in an overload state.

In a possible design, the first network element determines the third network element. The specific method may be: after the first network element sends the service request message to the second network element, from the The second network element receives a rejection message, where the rejection message includes the identification information of the third network element; the first network element determines the third network element according to the identification information of the third network element; or, The first network element obtains at least one candidate network element in the non-overloaded state in the network element set from the network storage function network element according to the identifier of the network element set where the second network element is located; A network element determines the third network element among the at least one candidate network element; or, the first network element sends the identifier of the network element set to the network storage function, and stores it from the network The function receives the configuration files of all network elements in the network element set; the first network element determines the third network element in a non-overloaded state according to the configuration information of all network elements in the network element set; or, When all network elements in the network element set are in an overload state, the first network element determines the third network element in at least one network element with the same function as the second network element.

Through the above method, the first network element can accurately determine the third network element, so that the third network element can subsequently provide services to the first network element through the third network element, thereby improving service performance.

In a possible design, the first network element sends the service request message to the third network element, the specific method may be: the first network element generates a resource identifier corresponding to the third network element , And send the service request message to the third network element according to the resource identifier corresponding to the third network element.

Through the above method, the first network element can accurately request services from the third network element, so that the third network element subsequently provides services for the first network element and improves service performance.

In a possible design, the first network element generates the identifier corresponding to the third network element, and the specific method may be: when the third network element is included in the network element set where the second network element is located In the middle, the first network element generates the resource identifier corresponding to the third network element according to the resource identifier corresponding to the second network element and the identifier of the third network element.

Through the above method, the first network element can accurately determine the resource identifier corresponding to the third network element, so that the subsequent service request message can be accurately sent to the third network element.

In a possible design, the service request message sent by the first network element to the third network element includes the resource identifier corresponding to the second network element or the identifier of the second network element. At least one of them. In this way, the third network element can subsequently accurately obtain the service context.

In a possible design, the first network element reduces the rate of sending the service request message to the second network element. The specific method may be: the first network element determines that the first network element sends the service request message to the The reduced rate when the second network element sends the service request message; the first network element sends the service request message to the second network element at the reduced rate.

The above method can alleviate the overload situation of the second network element.

In a possible design, the first network element determines the reduced rate when the first network element sends the service request message to the second network element. The specific method may be: the first network element After sending the service request message to the second network element, a rejection message is received from the second network element, the rejection message includes second indication information, and the second indication information is used to indicate the reduced The first network element determines the reduced rate according to the second indication information; or, the first network element obtains a configuration file of the second network element, and the configuration file includes an indication The indication information of the reduced rate when the second network element receives the service request message; the first network element determines the reduced rate according to the indication information indicating the reduced rate.

Through the above method, the first network element can accurately determine the reduced rate, so that when the first network element does not need to reselect a serving network element, the reduced rate is used to send the The second network element sends a service request message.

In the second aspect, this application provides a communication method, which includes:

After the second network element determines that it is in an overload state, the second network element sends a first update request message to the network storage function network element, where the first update request message is used to instruct the network storage function network element to The status of the second network element is updated to the overload status.

Through the above method, when the second network element is overloaded, its configuration file in the network storage function is updated so that the first network element can reselect the serving network element or reduce the speed. When the first network element reselects the serving network element It not only reduces the load of the overloaded second network element, but also does not affect the service performance of the first network element.

In a possible design, after receiving the service request message from the first network element, the second network element sends an overload indication message to the first network element, and the overload indication message is used to instruct the second network element It is currently overloaded.

Through the above method, the first network element can determine that the second network element is in an overload state, so that the first network element subsequently determines whether it is necessary to reselect a serving network element.

In a possible design, the overload indication message includes first indication information, and the first indication information is used to indicate that the second network element supports reselection of a serving network element.

Through the foregoing method, the first network element may determine, through the first indication information in the overload indication message, that when the second network element is in an overload state, it is necessary to reselect a serving network element.

In a possible design, the second network element receives a service request message from the first network element; the second network element sends a rejection message to the first network element, and the rejection message includes the first indication information , The first indication information is used to indicate that the second network element supports reselection of a serving network element.

Through the above method, the first network element can be made to determine that the serving network element needs to be reselected when the second network element is in an overload state through the first indication information in the rejection message.

In a possible design, the rejection message further includes an identifier of a third network element, and the third network element is a serving network element that needs to be reselected by the first network element.

Through the above method, the first network element can determine that the serving network element that needs to be reselected subsequently is the third network element according to the identifier of the third network element.

In a possible design, the first update request message includes indication information indicating a reduced rate when the second network element receives the service request message.

Through the above method, the network storage function network element can update the indication information indicating the reduced rate when the second network element receives the service request message to the configuration file of the second network element, so that When the first network element determines that there is no need to reselect the serving network element, the indication information is obtained from the configuration file of the second network element to determine the reduced rate.

In a possible design, the second network element determines that it is in an overload state. The specific method may be: when the second network element determines that the current load of the second network element is greater than or equal to the load threshold, the second network element Make sure that you are overloaded.

Through the above method, the second network element can accurately determine that it is in an overload state, so that the second network element can perform the subsequent configuration file update process.

In a possible design, after the second network element determines that it switches from an overload state to a non-overload state, it sends a second update request message to the network storage function network element, and the second update request message is used to indicate The network storage function network element updates the state of the second network element to a non-overloaded state.

Through the above method, the second network element can update its current state to the non-overloaded state through the network storage function network element, so that subsequent other network elements can select the second network element to provide services.

In a possible design, the second network element determines that it is switched from the overload state to the non-overload state. The specific method may be: when the second network element determines that the current load of the second network element is less than the load threshold, The second network element determines that it switches from an overload state to a non-overload state.

Through the above method, the second network element can accurately determine that it is in a non-overloaded state, so that the second network element can perform the subsequent configuration file update process.

In the third aspect, this application provides a communication method, which may include:

The network storage function network element receives a first update request message from the second network element, where the first update request message is used to instruct the network storage function network element to update the state of the second network element to an overload state; The network storage function network element updates the state of the second network element in the configuration file of the second network element from a non-overloaded state to an overloaded state according to the first update request message.

In a possible design, the network storage function network element receives from the first network element the identity of the network element set where the second network element is located; the network storage function network element according to the identity of the network element set, Determine at least one candidate network element in a non-overloaded state in the network element set, and send an identifier of the at least one candidate network element to the first network element.

Through the above method, after the second network element is in an overload state, the first network element can determine from the at least one candidate network element that the third network element provides service for the first network element.

In a possible design, the network storage function network element receives from the first network element the identity of the network element set where the second network element is located; the network storage function network element determines according to the identity of the network element set All network elements in the network element set, and sending configuration files of all the network elements to the first network element, and the configuration file of each network element includes the current status information of each network element, The status information is an overload state or a non-overload state.

Through the above method, after the second network element is in the overload state, the first network element can select a network element in the non-overload state as the first network element according to the status information in the configuration file of each network element Provide services.

In a possible design, the network storage function receives a second update request message from the second network element, and the second update request message is used to instruct the network storage function network element to set the second network element The state of the network storage function is updated to the non-overloaded state; the network storage function network element updates the state of the second network element in the configuration file of the second network element from the overloaded state to the non-overloaded state according to the second update request message status.

In a fourth aspect, this application provides a communication method, which includes:

The third network element receives a service request message from the first network element; the third network element is the service network element reselected by the first network element; the service request message includes the resource identifier corresponding to the second network element Or at least one of the identifiers of the second network element; the third network element obtains information from the second network element according to at least one of the identifier corresponding to the second network element or the identifier of the second network element Meta obtains the business context.

Through the above method, after the first network element reselects the serving network element, the third network element can accurately obtain the service context, and perform the subsequent communication process with the first network element to communicate with the first network element. The network element provides services, which can relieve the overload state of the second network element, improve the service performance of the first network element, and improve the service experience of the first network element.

In a fifth aspect, the present application also provides a first network element that has a function of realizing the behavior of the first network element in the foregoing method example of the first aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the first network element includes a processing unit, a sending unit, and optionally a receiving unit. These units can perform the corresponding functions in the above-mentioned method example of the first aspect. For details, refer to the method example The detailed description in, will not be repeated here.

In a possible design, the structure of the first network element includes a transceiver and a processor, and optionally also includes a memory, the transceiver is used to send and receive data, and to communicate with other devices in the communication system Interactively, the processor is configured to support the first network element to perform the corresponding function in the above-mentioned method in the first aspect. The memory is coupled with the processor, and stores the necessary program instructions and data of the first network element.

In the sixth aspect, the present application also provides a second network element that has the function of realizing the behavior of the second network element in the method example of the second aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the second network element includes a processing unit, a sending unit, and optionally a receiving unit. These units can perform the corresponding functions in the above-mentioned method examples of the second aspect. For details, refer to the method examples The detailed description in, will not be repeated here.

In a possible design, the structure of the second network element includes a transceiver, a processor, and optionally a memory, and the transceiver is used to send and receive data and to communicate with other devices in the communication system. Interactively, the processor is configured to support the second network element to perform the corresponding function in the above-mentioned second aspect method. The memory is coupled with the processor, and stores necessary program instructions and data of the second network element.

In a seventh aspect, the present application also provides a network storage function network element that has the function of realizing the behavior of the network storage function network element in the method example of the third aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the network storage function network element includes a receiving unit, a processing unit, and optionally a sending unit. These units can perform the corresponding functions in the above-mentioned method examples of the third aspect. For details, refer to the method The detailed description in the example will not be repeated here.

In a possible design, the structure of the network storage function network element includes a transceiver, a processor, and optionally a memory. The transceiver is used to send and receive data, and to communicate with other devices in the communication system. For communication interaction, the processor is configured to support the network storage function network element to perform the corresponding function in the method of the third aspect. The memory is coupled with the processor, and stores the necessary program instructions and data of the network storage function network element.

In an eighth aspect, this application also provides a third network element that has the function of realizing the behavior of the third network element in the method example of the fourth aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the third network element includes a receiving unit and a processing unit, and these units can perform the corresponding functions in the method example of the fourth aspect. For details, please refer to the detailed description in the method example. Do repeat.

In a possible design, the structure of the third network element includes a transceiver and a processor, and optionally also includes a memory, the transceiver is used to send and receive data, and to communicate with other devices in the communication system Interactively, the processor is configured to support the third network element to perform the corresponding function in the above-mentioned fourth aspect method. The memory is coupled with the processor, and stores the necessary program instructions and data of the third network element.

In a ninth aspect, this application also provides a system, which includes a first network element, and the first network element can be used to perform the first aspect and any one of the methods in the first aspect executed by the first network element step. In a possible design, the system may further include a second network element, and the second network element may be used to perform the steps performed by the second network element in any one of the first aspect and the first aspect. In a possible design, the system may further include a third network element, and the three network elements may be used to perform the steps performed by the third network element in any one of the first aspect and the first aspect. In a possible design, the system may also include other devices that interact with at least one of the first network element, the second network element, or the third network element in the solution provided in the embodiment of the application, such as a network storage function network. Yuan and so on.

In a tenth aspect, this application also provides a system, which includes a second network element, and the second network element can be used to perform the second aspect and any one of the methods in the second aspect that is executed by the second network element. step. In a possible design, the system may further include a network storage function network element, and the network storage function network element may be used to execute the network storage function network element in the second aspect and any one of the methods of the second aspect. A step of. In a possible design, the system may also include other devices that interact with the second network element and/or the network storage function network element in the solution provided in the embodiments of the present application, such as the first network element and so on.

In an eleventh aspect, the present application also provides a system that includes a network storage function network element that can be used to perform the network storage function in the third aspect and any of the methods in the third aspect. Steps performed by the network element. In a possible design, the system may further include a second network element, and the second network element may be used to perform the steps performed by the second network element in the third aspect and any method of the third aspect. In a possible design, the system may also include other devices that interact with the second network element and/or the network storage function network element in the solution provided in the embodiments of the present application, such as the first network element and so on.

In the twelfth aspect, this application also provides a system that includes a third network element, and the third network element can be used to perform any of the above-mentioned fourth aspect and the fourth aspect. A step of. In a possible design, the system may further include a first network element, and the first network element may be used to perform the steps performed by the first network element in any of the foregoing fourth aspect and the fourth aspect. In a possible design, the system may also include other devices that interact with the third network element and/or the first network element in the solution provided in the embodiments of the present application, such as the second network element and so on.

In a thirteenth aspect, this application also provides a computer storage medium that stores computer-executable instructions, and when called by the computer, the computer-executable instructions are used to make the computer execute the above Either way.

In the fourteenth aspect, this application also provides a computer program product containing instructions, which when run on a computer, causes the computer to execute any of the above methods.

In a fifteenth aspect, the present application also provides a chip, which is coupled with a memory, and is used to read and execute program instructions stored in the memory to implement any of the above methods.

Description of the drawings

Fig. 1 is a schematic structural diagram of a communication system provided by this application;

Figure 2 is a flowchart of a communication method provided by this application;

Figure 3 is a flowchart of another communication method provided by this application;

Figure 4 is a flowchart of another communication method provided by this application;

FIG. 5 is a flowchart of an example of a communication method provided by this application;

FIG. 6 is a flowchart of an example of another communication method provided by this application;

FIG. 7 is a flowchart of an example of another communication method provided by this application;

FIG. 8 is a schematic structural diagram of a device provided by this application;

FIG. 9 is a schematic structural diagram of another device provided by this application;

FIG. 10 is a schematic structural diagram of another device provided by this application;

FIG. 11 is a schematic structural diagram of another device provided by this application;

FIG. 12 is a structural diagram of a first network element provided by this application;

FIG. 13 is a structural diagram of a second network element provided by this application;

FIG. 14 is a structural diagram of a network storage function network element provided by this application;

FIG. 15 is a structural diagram of a third network element provided by this application.

detailed description

The application will be further described in detail below in conjunction with the accompanying drawings.

The embodiments of the present application provide a communication method and device to improve business performance and improve consumer experience. Among them, the method and device described in the present application are based on the same inventive concept. Since the method and the device have similar principles for solving the problem, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

Hereinafter, some terms in this application are explained to facilitate the understanding of those skilled in the art.

1). The first network element, the second network element, and the third network element: the first network element can be regarded as a client in the communication process, and the second network element and the third network element can be regarded as For the server in the communication process, the second network element and the third network element provide services for the first network element. Wherein, the first network element is first provided by the second network element, and then when the second network element is overloaded, the third network element provides the service for the first network element. Wherein, the first network element may be a control plane network element such as an access and mobility management function network element and a session management function network element in the core network, or a service communication agent, etc.; the second network element And the third network element may also be a control plane network element such as an access and mobility management function network element and a session management function network element in the core network. It should be understood that when the first network element communicates with the second network element, the first network element and the second network element are different network elements; or the first network element and the When the third network element communicates, the first network element and the third network element are different network elements.

2) The overload state, which can also be called the suspend state, refers to the state where the current load of the network element is greater than or equal to the load threshold. In this state, the network element can provide services for the current service request to a certain extent, but the service efficiency needs to be reduced. However, in this state, for newly added service requests other than the current service request, the network element cannot provide services.

3) In the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor as indicating or implying order.

In order to more clearly describe the technical solutions of the embodiments of the present application, the communication methods and devices provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the architecture of a possible communication system to which the communication method provided by the embodiment of the present application is applicable. The architecture of the communication system includes network open function network elements, network storage function network elements, policy control function network elements, Data management network element, application function network element, authentication server function, core network access and mobility management function network element, session management function network element, service communication agent, terminal equipment, access network equipment, user plane function network element And data network. Among them: Figure 1 shows a possible example of the architecture of the communication system, which specifically includes: NEF network element, NRF network element, PCF network element, UDM network element, AF network element, AUSF network element, AMF network element , SMF network elements, SCP, UE, access network (AN) equipment, UPF network elements and data network (DN). Among them, the AMF network element and the terminal device can be connected through the N1 interface, the AMF and the AN device can be connected through the N2 interface, the AN device and the UPF can be connected through the N3 interface, and the SMF and UPF can be connected through the N4 interface. , UPF and DN can be connected through the N6 interface. The interface name is only an example description, and the embodiment of the present application does not specifically limit this. It should be understood that the embodiment of the present application is not limited to the communication system shown in FIG. 1. The name of the network element shown in FIG. 1 is only used as an example here, and is not used as an architecture of the communication system applicable to the method of the present application. Limitations of included network elements. The function of each network element or device in the communication system is described in detail below:

The terminal equipment, which can also be called user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a way to provide users with voice and/or data connectivity Sexual equipment. For example, the terminal device may include a handheld device with a wireless connection function, a vehicle-mounted device, and the like. At present, the terminal device may be: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented Augmented reality (AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, smart grid (smart grid) ), the wireless terminal in transportation safety, the wireless terminal in the smart city, or the wireless terminal in the smart home. Wherein, the terminal device described in FIG. 1 is shown as a UE, which is only used as an example and does not limit the terminal device.

The wireless access network may be an access network (access network, AN) as shown in FIG. 1, which provides wireless access services to the terminal device. The access network device is a device that connects the terminal device to a wireless network in the communication system. The access network device is a node in a radio access network, which can also be called a base station, or a radio access network (RAN) node (or device). At present, some examples of access network equipment are: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (RNC), Node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (base Band unit, BBU), or wireless fidelity (Wifi) access point (AP), etc.

The data network, for example, the data network (DN) shown in FIG. 1, may be the Internet, IP Multi-media Service (IMS) network, local network (ie, local network, such as mobile Edge computing (mobile edge computing, MEC network), etc. The data network includes an application server, and the application server provides business services for the terminal device by performing data transmission with the terminal device.

The core network is used to connect the terminal device to a DN that can implement the service of the terminal device. The functions of each network element in the core network are described below:

The core network access and mobility management function network element can be used to manage the access control and mobility of the terminal device. In practical applications, it includes the long term evolution (LTE) network The mobility management function in the mobility management entity (MME) in the framework, and the access management function is added, which can be specifically responsible for the registration of the terminal equipment, mobility management, tracking area update process, reachability detection, Session management function network element selection, mobile state transition management, etc. For example, in 5G, the core network access and mobility management function network element may be an AMF (access and mobility management function) network element. For example, as shown in Figure 1, in future communications, such as 6G, the core network The access and mobility management function network element can still be an AMF network element or have other names, which is not limited in this application. When the core network access and mobility management function network element is an AMF network element, the AMF may provide Namf service.

The session management function network element can be used to be responsible for the session management of the terminal device (including the establishment, modification and release of the session), the selection and reselection of the user plane function network element, and the internet protocol of the terminal device. , IP) address allocation, quality of service (quality of service, QoS) control, etc. For example, in 5G, the session management function network element may be an SMF (session management function) network element. For example, as shown in FIG. 1, in future communications, such as 6G, the session management function network element may still be an SMF network element. Yuan, or other names, this application is not limited. When the session management function network element is an SMF network element, the SMF can provide the Nsmf service.

The authentication server function network element can be used to provide authentication services. For example, in 5G, the authentication server function network element may be an AUSF network element, as shown in Figure 1, for example; in future communications, such as 6G, the authentication server function network element may still be AUSF (authentication server function network element). ) A network element, as shown in Figure 1, for example, in future communications, such as 6G, the authentication server function network element may still be an AUSF network element or have other names, which is not limited in this application. When the authentication server function network element is an AUSF network element, the AUSF network element may provide Nausf services.

The policy control function network element can be used to be responsible for policy control decision-making, to provide functions such as service data flow and application detection, gating control, QoS, and flow-based charging control. For example, in 5G, the policy control function network element may be a PCF (policy control function) network element. For example, as shown in Figure 1, in future communications, such as 6G, the policy control function network element may still be a PCF network. Yuan, or other names, this application is not limited. When the policy control function network element is a PCF network element, the PCF network element may provide Npcf service.

The main function of the application function network element is to interact with the 3rd generation partnership project (the 3rd generation partnership project, 3GPP) core network to provide services to affect service flow routing, access network capability opening, policy control, etc. For example, in 5G, the application function network element may be an AF (application function) network element. For example, as shown in FIG. 1, in future communications, such as 6G, the application function network element may still be an AF network element, or There are other names, and this application is not limited. When the application function network element is an AF network element, the AF network element may provide Naf services.

The data management network element may be used to manage subscription data of the terminal device, registration information related to the terminal device, and the like. For example, in 5G, the data management network element may be a unified data management network element (unified data management, UDM). For example, as shown in FIG. 1, in future communications, such as 6G, the data management network element may still be UDM network elements, or other names, are not limited in this application. When the data management network element is a UDM network element, the UDM network element may provide Nudm services.

The network open function network element can be used to enable 3GPP to safely provide network service capabilities to third-party AF (for example, Service Capability Server (SCS), Application Server (AS), etc.). For example, in 5G, the network opening function network element may be a NEF (network exposure function) network element. For example, as shown in Figure 1, in future communications, such as 6G, the network opening function network element may still be a NEF network. Yuan, or other names, this application is not limited. When the network opening function network element is NEF, the NEF may provide Nnef services to other network function network elements.

The network storage function network element can be used for network function entities and description information of the services they provide, and support service discovery, network element entity discovery, etc. For example, in 5G, the network storage function network element may be NRF (network repository function). For example, as shown in Figure 1, in future communications, such as 6G, the network element may still be NRF network element or have other names. , This application is not limited. When the network storage function network element is an NRF network element, the NRF network element may provide Nnrf services.

The user plane function network element can be used to forward user plane data of the terminal device. The main functions are data packet routing and forwarding, mobility anchors, and uplink classifiers to support routing traffic to the data network, branch points to support multi-homing packet data unit (PDU) sessions, etc. For example, in 5G, the user plane function network element may be a UPF (user plane function) network element, as shown in Figure 1, for example; in future communications, such as 6G, the user plane function network element may still be a UPF network element. Yuan, or other names, this application is not limited.

The above network elements in the core network can also be called functional entities. They can be network elements implemented on dedicated hardware, software instances running on dedicated hardware, or instances of virtualized functions on an appropriate platform. For example, the aforementioned virtualization platform may be a cloud platform.

It should be noted that the architecture of the communication system shown in FIG. 1 is not limited to only include the network elements shown in the figure, and may also include other devices not shown in the figure. The specifics of this application will not be listed here. .

It should be noted that the embodiment of the present application does not limit the distribution form of each network element in the core network, and the distribution form shown in FIG. 1 is only exemplary, and this application does not limit it.

For the convenience of description, the following description of this application will take the network element shown in FIG. 1 as an example, and the XX network element will be directly referred to as XX. It should be understood that the names of all network elements in this application are merely examples, and may also be referred to as other names in future communications, or the network elements involved in this application may also be used by other entities or devices with the same functions in future communications. Instead, this application does not limit this. Here is a unified explanation, and will not be repeated in the following.

It should be noted that the communication system shown in FIG. 1 does not constitute a limitation of the communication system applicable to the embodiments of the present application. The communication system architecture shown in FIG. 1 is a 5G system architecture. Optionally, the method in the embodiment of the present application is also applicable to various future communication systems, such as 6G or other communication networks.

The communication method provided by the embodiment of the present application is applicable to the communication system shown in FIG. 1. As shown in Figure 2, the specific process of the method may include:

Step 201: After the first network element determines that the second network element is in an overload state, it determines whether it is necessary to reselect the serving network element. If yes, go to step 202, otherwise go to step 203; the second network element is currently the first A service network element that provides services.

In an optional implementation manner, the first network element determines that the second network element is in an overload state, which can be classified into the following three situations:

Case a1: After the first network element sends a service request message to the second network element, it receives an overload indication message from the second network element, where the overload indication message is used to indicate that the second network element is currently Overload state.

Exemplarily, the second network element may send a rejection message to the first network element after receiving the service request message of the first network element, where the rejection message includes the overload indication message.

Case a2: The first network element obtains the configuration file of the second network element, and the first network element determines that the second network element is in an overload state according to the configuration file of the second network element.

In an example, the first network element may obtain the configuration information of the second network element from a network storage function network element, and when the first network element recognizes the configuration file of the second network element When the state of the second network element is displayed as the overload state, it is determined that the second network element is in the overload state.

Case a3: When the first network element fails to obtain the configuration file of the second network element from the network storage function network element, the first network element determines that the second network element is in an overload state.

Specifically, when the first network element requests the configuration file of the second network element from the network storage function network element, the network storage function network element recognizes that the configuration file of the second network element When the status of the second network element is displayed as an overload state, it will refuse to send the configuration file of the second network element to the first network element, that is, the first network element obtains the second network element The configuration file failed.

It should be noted that in the above cases a2 and a3, the status of the second network element in the configuration file of the second network element is displayed as the overload state because the second network element determines that it is in After the overload state, request the network storage function to update the configuration file of the second network element, that is, request the network storage function network element to update the status of the second network element in the configuration file of the second network element Update to overload status.

In an optional implementation manner, when the first network element determines whether to reselect a serving network element, the specific method may be: the first network element obtains first indication information, and the first indication information is used At indicating whether the second network element supports reselection of a serving network element. When the first indication information indicates that the second network element supports reselection of a serving network element, the first network element determines that it needs to reselect a serving network element; when the first indication information indicates that the second network element When the element does not support the reselection of the serving network element, the first network element determines that there is no need to reselect the serving network element.

Exemplarily, the first network element may obtain the first indication information in the following three manners:

Manner b1: After the first network element sends a service request message to the second network element, it receives a rejection message from the second network element, where the rejection message includes the first indication information.

In this manner, when the conditions of a1 above occur simultaneously, the first indication information may also be included in the overload indication message.

Manner b2: The first network element receives a first message from the second network element, and the first message includes the first indication information.

In this manner, the first message may be sent by the second network element to the first network element before the first network element sends the service request to the second network element.

Exemplarily, in the case of a1, the first message may be sent before the overload indication message.

Manner b3: The first network element obtains the configuration file of the second network element, and the configuration file of the second network element includes the first indication information.

In a specific implementation manner, the first indication information may be an identifier of the set where the second network element is located.

In another optional implementation manner, it may be stipulated in advance through an agreement that when the second network element is overloaded, whether the first network element needs to reselect a serving network element, and the first network element is stipulated based on the agreement Determine whether to reselect the service network element.

It should be understood that all network elements such as the second network element serving the first network element may be regarded as serving network elements.

In specific implementation, when the first network element mentioned above sends a service request to the second network element, it all sends the second network element according to the resource identifier corresponding to the second network element. Request for service. Specifically, it may be divided into the following two situations:

Case c1: When the first network element has created a resource for service on the second network element, the resource identifier corresponding to the second network element may be the resource universal identifier (resource universal). resource identifier, resource URI).

In this case, the resource identifier corresponding to the second network element is sent by the second network element to the first network element.

Case c2: When the first network element has not created service resources on the second network element, but the first network element has already obtained the information of the second network element, for example, it may be the Identification information of the second network element. In this way, the resource identifier corresponding to the second network element may be generated by the first network element according to the information of the second network element. For example, when the first network element has obtained the identifier of the second network element, the first network element may obtain the configuration file of the second network element according to the identifier of the second network element, and Obtain the address information of the second network element from the configuration file of the second network element, so as to generate a resource URI corresponding to the second network element.

In the above case c2, in a specific implementation manner, when the first network element is an SCP, the control plane network element in the core network sends the identifier of the second network element to the SCP, and the The SCP obtains the configuration file of the second network element, so as to obtain the address information of the second network element, so that the SCP generates a Resource URI.

In case c2 above, in combination with case a2 or case a3, the first network element can determine whether the second network element is in an overload state, and in combination with case b2 or case b3, the first network element can determine whether it needs Reselect the service network element.

Step 202: When the first network element determines that a service network element needs to be reselected, the first network element determines a third network element, and sends a service request message to the third network element.

Specifically, when the first network element determines that the serving network element needs to be reselected through the method in step 201, the method for the first network element to determine the third network element may include at least the following four:

Method d1: After the first network element sends the service request message to the second network element, receiving a rejection message from the second network element, where the rejection message includes the identification information of the third network element ; The first network element determines the third network element according to the identification information of the third network element.

Method d2: The first network element obtains at least one candidate network element in the non-overloaded state in the network element set from the network storage function network element according to the identifier of the network element set where the second network element is located; The first network element determines the third network element among the at least one candidate network element.

Specifically, after the first network element sends the identifier of the network element set where the second network element is located to the network storage function network element, the network storage function network element is based on the information included in the network element set The configuration file of each network element selects at least one candidate network element in a non-overloaded state, and the first network element may select one network element from the at least one candidate network element as the third network element.

Of course, the first network element may select one network element from the at least one candidate network element as the third network element randomly or according to other preset rules.

Method d3: The first network element sends an identifier of the network element set to the network storage function, and receives configuration files of all network elements in the network element set from the network storage function; the first network The element determines the third network element in a non-overloaded state according to the configuration information of all network elements in the network element set.

In this method, after the network storage function network element sends the configuration files of all network elements to the first network element, the first network element screens according to the network element status in the configuration file of each network element At least one network element in the non-overloaded state is selected, and then one network element is selected as the third network element among the at least one network element in the non-overloaded state; the first network element can be selected randomly or according to preset rules The coming out network element in the non-overloaded state selects one network element as the third network element. Of course, there may be other methods, and this application will not list them all.

Method d4: When all network elements in the network element set are in an overload state, the first network element determines the third network element in at least one network element that has the same function as the second network element.

In an optional implementation manner, in the foregoing method d2 and method d3, the first network element may be the second network element obtained from the second network element before the second network element is overloaded. The identifier of the network element collection where the element is located.

In an optional implementation manner, the first network element sends the service request message to the third network element, and the specific method may be: the first network element generates the service request message corresponding to the third network element Resource identifier; the first network element sends the service request message to the third network element according to the resource identifier corresponding to the third network element.

Exemplarily, the first network element generates the identifier corresponding to the third network element, and the specific method may be: when the third network element is included in the network element set where the second network element is located, The first network element generates the resource identifier corresponding to the third network element according to the resource identifier corresponding to the second network element and the identifier of the third network element. The identifier of the third network element may be an Internet Protocol (IP) address or a fully qualified domain name (FQDN) of the third network element.

For example, when the first network element generates the resource identifier of the third network element according to the resource identifier corresponding to the second network element and the identifier of the third network element, the first network element may The authority field in the source resource URI is replaced with the address of the third network element.

For another example, when the third network element is not in the network element set where the second network element is located, the resource URI corresponding to the third network element generated by the first network element does not point to a specific resource. For example, taking the second network element and the third network element as SMF as an example, the format of the resource URI corresponding to the second network element may be as follows: {apiRoot}/nsmf-pdusession/v1/sm-contexts /{smContextRef}/<operation>, the smContextRef in the Resource URI is a resource-related descriptor. If the resource URI corresponding to the third network element generated by the first network element does not include this descriptor, the resource URI corresponding to the third network element may adopt the following format: {apiRoot}/nsmf-pdusession/v1 /sm-contexts/<operation>, the resource URI points to a set of session contexts, not to a specific session resource. The operation is optional and is used to instruct the third network element to perform corresponding operations.

In an optional implementation manner, the service request message sent by the first network element to the third network element includes a resource identifier corresponding to the second network element or the second network element Logo. In this way, the third network element can subsequently accurately obtain the service context.

Step 203: When the first network element determines that there is no need to reselect a serving network element, the first network element reduces the rate of sending the service request message to the second network element.

In an optional implementation manner, the first network element reduces the rate of sending the service request message to the second network element. The specific method may be: the first network element determines that the first network element The reduced rate when the element sends the service request message to the second network element; the first network element sends the service request message to the second network element at the reduced rate.

Exemplarily, the first network element determining the reduced rate when the first network element sends the service request message to the second network element may include the following two methods:

Method e1: After the first network element sends the service request message to the second network element, it receives a rejection message from the second network element, where the rejection message includes second indication information, and the second network element The indication information is used to indicate the reduced rate; the first network element determines the reduced rate according to the second indication information.

Wherein, when the second indication information indicates the reduced speed, the second indication information may directly be the reduced speed, or the second indication information may be a speed reduction auxiliary parameter, such as speed reduction amplitude and many more.

When the second indication information is a speed reduction auxiliary parameter, the first network element determines the reduced speed according to the speed reduction auxiliary parameter.

Method e2: The first network element obtains a configuration file of the second network element, where the configuration file includes indication information indicating the reduced rate when the second network element receives a service request message; The first network element determines the reduced rate according to the indication information indicating the reduced rate.

Wherein, the indication information indicating the reduced speed may be the speed reduction assistance parameter.

Exemplarily, after the second network element is overloaded, when requesting the network storage function network element to update the configuration file of the second network element, the speed reduction auxiliary parameter may also be registered in the configuration file.

Using the communication method provided in the embodiment of the present application, after the first network element determines that the second network element is in an overload state, it determines whether it is necessary to reselect the serving network element. When the first network element determines that the service network element needs to be reselected, The first network element determines a third network element, and sends a service request message to the third network element; or, when the first network element determines that there is no need to reselect a serving network element, the first network element reduces A rate at which the service request message is sent to the second network element. Through the above method, the first network element can flexibly reselect the service network element according to actual conditions, thereby improving service performance and improving service experience.

Based on the above-mentioned embodiments, the present application also provides a communication method, which is applicable to the communication system shown in FIG. 1 and realizes the status update of the network element, so that the network element provides services for other network elements according to actual conditions. Referring to Figure 3, the specific process of the method may include:

Step 301: The second network element determines that it is in an overload state.

In an optional implementation manner, the second network element determines that it is in an overload state. The specific method may be: when the second network element determines that the current load of the second network element is greater than or equal to a load threshold, The second network element determines that it is in an overload state.

Step 302: The second network element sends a first update request message to a network storage function network element, where the first update request message is used to instruct the network storage function network element to update the status of the second network element to Overload state.

In an optional implementation manner, when the second network element is in an overload state, after the second network element receives a service request message from the first network element, it sends an overload indication to the first network element Message, the overload indication message is used to indicate that the second network element is currently in an overload state.

In an optional implementation manner, the overload indication message may include first indication information, and the first indication information is used to indicate that the second network element supports reselection of a serving network element.

In an optional implementation manner, the overload indication message may include a speed reduction assistance parameter, and the speed reduction assistance parameter is used to instruct the first network element to reduce the rate at which the service request message is sent to the second network element.

In an optional implementation manner, when the second network element is in an overload state, the second network element sends a rejection message to the first network element after receiving a service request message from the first network element, The rejection message includes the first indication information.

In an optional implementation manner, the overload indication message is sent by including the overload indication message in the rejection message when the second network element sends a rejection message.

In an optional implementation manner, when the rejection message contains the first indication information, or when the overload indication message in the rejection message always contains the first indication information, the rejection message The identifier of a third network element may also be included in the third network element, and the third network element is a serving network element that needs to be reselected by the first network element, so that the first network element can determine a serving network element for subsequent communication.

In an optional implementation manner, the rejection message may further include second indication information, and the second indication information is used to instruct the first network element to send a service request to the second network element to reduce After the rate. In this way, the first network element can determine the reduced rate according to the second indication information, so that when the second network element does not support reselection of the serving network element, the first network element uses the The reduced rate sends a service request to the second network element.

In an optional implementation manner, the first update request message includes indication information indicating a reduced rate when the second network element receives the service request message. In this way, after the first network element subsequently obtains the indication information, the reduced rate is determined according to the indication information, so that when the second network element does not support reselection of the serving network element, the The first network element sends a service request to the second network element at the reduced rate.

Exemplarily, the second indication information and the indication information indicating the reduced rate when the second network element receives the service request message may be the reduced rate, or a speed reduction auxiliary parameter, such as speed reduction Amplitude and so on.

In an optional implementation manner, the network storage function network element receives a subscription request of a fourth network element, and the subscription request is used to subscribe to the state of the second network element. When the state of the second network element changes from an overloaded state to an overloaded state, or changes from an overloaded state to an overloaded state, the network storage function network element sends a notification message to the fourth network element to change The status of the second network element is sent to the fourth network element. Wherein, it should be noted that the fourth network element may also be the first network element.

Step 303: The network storage function network element updates the state of the second network element in the configuration file of the second network element from a non-overloaded state to an overloaded state according to the first update request message.

In an optional implementation manner, after the network storage function network element receives from the first network element the identifier of the network element set where the second network element is located, the network element determines the At least one candidate network element in a non-overloaded state in the network element set, and sending an identifier of the at least one candidate network element to the first network element.

Specifically, the network storage function determines at least one candidate network element in a non-overloaded state according to the status in the configuration file of each network element in the network element set, so that the first network element can be One of the at least one candidate network element is selected as the reselected serving network element, that is, the third network element.

In an optional implementation manner, after the network storage function network element receives from the first network element the identifier of the network element set where the second network element is located, the network element determines the network according to the identifier of the network element set. All the network elements in the element set, and send the configuration files of all the network elements to the first network element. In this way, the first network element can filter out at least one network element in a non-overloaded state according to the status in the configuration file of each network element, and then select one network element among the at least one network element as the The third network element.

In an optional implementation manner, in a subsequent process, when the second network element determines that it switches from an overload state to a non-overload state, it sends a second update request message to the network storage function network element, and The second update request message is used to instruct the network storage function network element to update the status of the second network element to a non-overloaded state, and then the network storage function network element updates the network storage function network element according to the second update request message. The state of the second network element in the configuration file of the second network element is updated from an overload state to a non-overload state.

In an optional implementation manner, the second network element determines that it is switched from the overload state to the non-overload state. The specific method may be: the second network element determines that the current load of the second network element is less than the load threshold When the second network element determines that it is switched from the overload state to the non-overload state.

In an optional implementation manner, if the fourth network element subscribes to the network storage function network element for the status of the second network element, the network storage function network element is in the second network When the element is switched from the overloaded state to the overloaded state, or when the overloaded state is switched to the overloaded state, a notification message is sent to the fourth network element, and the state of the second network element is sent to the fourth network element.

Using the communication method provided in this application, after the second network element determines that it is in an overload state, it sends a first update request message to the network storage function network element, and the first update request message is used to instruct the network storage function network element to The status of the second network element is updated to an overload status. With this method, when the second network element is overloaded, its configuration file in the network storage function is updated, so that the first network element can reselect the serving network element or reduce the speed, when the first network element reselects the serving network element It not only reduces the load of the overloaded second network element, but also does not affect the service performance of the first network element.

Based on the above embodiment, this application also provides a communication method, which implements the communication process after the first network element involved in the above embodiment reselects the serving network element. Referring to Figure 4, the specific process of the method may include:

Step 401: The third network element receives a service request message from the first network element; the third network element is the service network element reselected by the first network element; the service request includes resources corresponding to the second network element At least one of the identifier or the identifier of the second network element.

Wherein, when the first network element sends the service request to the third network element, a resource identifier corresponding to the third network element needs to be generated first, and the resource identifier corresponding to the third network element Sending the service request to the third network element. Specifically, for the method and form of generating the resource identifier of the third network element, refer to the related description in step 202 in the embodiment shown in FIG. 2, and the details are not repeated here.

Step 402: The third network element obtains the service context from the second network element according to at least one of a resource identifier corresponding to the second network element or an identifier of the second network element.

In an optional implementation manner, when the third network element and the second network element before reselection belong to the same network element set, the third network element may directly obtain the resource context according to the resource-related identifier For example, when the second network element and the third network element are SMF network elements, the resource-related identifier may be smContextRef; or the third network element may be based on the identifier of the second network element and The resource-related identifier obtains the resource context.

In another optional implementation manner, when the third network element and the second network element are not in the same network element set, the third network element may be based on the resource identifier of the second network element The character obtains the resource context from the second network element.

Wherein, the resource context is the business context.

Using the communication method provided by the embodiment of the present application, after the first network element reselects the serving network element, the third network element can accurately obtain the business context, and perform the subsequent communication process with the first network element. The first network element provides services, thereby alleviating the overload state of the second network element, improving the service performance of the first network element, and improving the service experience of the first network element.

In addition to the above embodiments, the following uses specific examples, such as the embodiments shown in FIGS. 5-7, to describe in detail the communication method provided by the embodiments of the present application. In the following example, only a scenario where the first network element reselects the third network element after the second network element is overloaded is described. In the following example, the network storage function network element is NRF as an example.

As shown in FIG. 5, the specific process of an example of a communication method provided by this application may include the following steps:

Step 501: The second network element determines that it is in an overload state.

Specifically, the description of the second network element determining that it is in an overload state may refer to the content of step 301 in the embodiment shown in FIG. 3, which is not repeated here.

Step 502: The second network element sends a first update request message to the NRF network element, where the first update request message is used to instruct the NRF network element to update the state of the second network element to an overload state.

Specifically, for the related description of step 502, refer to the content of step 302 in the embodiment shown in FIG. 3, which will not be repeated here.

In a specific implementation manner, the first update request message may carry overload control information (OCI), and when the overload deceleration indication in the OCI is set to a specific value, it indicates that the second network The element is currently in an overload state. For example, when the overload speed reduction indication is set to be greater than 0, it means that the second network element is currently in an overload state.

Optionally, the OCI may also be used to indicate a reduced rate when the first network element sends a service request to the second network element after the second network element is in an overload state.

Optionally, the OCI may also carry first indication information.

Step 503: The NRF network element updates the state of the second network element in the configuration file of the second network element from a non-overloaded state to an overloaded state according to the first update request message.

Specifically, for the related description of step 503, refer to the content in step 303 in the embodiment shown in FIG. 3, which will not be repeated here.

In a specific implementation manner, the first update request message is used to instruct the NRF to update the OCI in the second network element configuration file, and accordingly, the NRF network element saves the OCI.

Step 504: The first network element sends a service request message 1 to the second network element.

Specifically, the specific method for the first network element to send the service request message 1 to the second network element may refer to the case c1 and the case c2 in step 201 in the embodiment shown in FIG. 2. Repeat it again.

Step 505: The second network element sends a rejection message to the first network element, where the rejection message includes an overload indication message and first indication information, and the overload indication message is used to indicate that the second network element is currently In an overload state, the first indication information indicates that the second network element supports reselection of a serving network element.

Optionally, the first indication information may be directly included in the overload indication message.

In a specific implementation manner, the second network element may include OCI in the rejection message, where the OCI is used to indicate that the second network element is currently in an overload state. At this time, the OCI can be understood as the overload indication message.

Optionally, the OCI may also carry first indication information.

Step 506: The first network element determines a third network element.

Optionally, there are multiple specific methods for the first network element to determine the third network element. You can refer to the four methods of method d1 to method d4 in step 202 in the embodiment shown in FIG. 2, which will not be detailed here. description.

Step 507: The first network element generates a resource identifier corresponding to the third network element.

Specifically, for the method for the third network element to generate the resource identifier corresponding to the third network element, reference may be made to the related description involved in step 202 in the embodiment shown in FIG. 2, which will not be described in detail here.

Step 508: The first network element sends a service request message 2 to the third network element according to the resource identifier corresponding to the third network element. The service request message 2 includes at least one of a resource identifier corresponding to the second network element or an identifier of the second network element.

Step 509: The third network element obtains the service context from the second network element according to the identifier corresponding to the second network element or the identifier of the second network element.

Step 510: The second network element determines that it switches from an overload state to a non-overload state.

Specifically, the second network element determines that it is switched from the overload state to the non-overload state. The specific method may be: when the second network element determines that the current load of the second network element is less than the load threshold, the second network element The element determines that it is switched from the overload state to the non-overload state.

Step 511: The second network element sends a second update request message to the NRF network element, where the second update request message is used to instruct the NRF network element to update the status of the second network element to not overloaded status.

Step 512: The NRF network element updates the state of the second network element in the configuration file of the second network element from an overload state to a non-overload state according to the second update request message.

It should be noted that the embodiment shown in FIG. 5 only shows the important key steps in the process of reselecting the serving network element, and the communication flow may also include other steps, which will not be shown here.

As shown in FIG. 6, the specific process of the example of another communication method provided in this application may include the following steps:

Step 601 to step 603 are similar to step 501 to step 503 in the example shown in FIG. 5, and reference may be made to each other for details, and details are not repeated here.

Step 604: The first network element obtains the configuration file of the second network element from the NRF network element.

Step 605: The first network element determines that the second network element is in an overload state according to the configuration file of the second network element.

Step 606 to step 612 are similar to step 506 to step 512 in the example shown in FIG. 5, and reference may be made to each other for details, and details are not repeated here.

As shown in FIG. 7, the specific process of the example of another communication method provided by the present application may include the following steps:

Step 701 to step 703 are similar to step 501 to step 503 in the example shown in FIG. 5, and reference may be made to each other for details, and details are not repeated here.

Step 704: The first network element fails to obtain the configuration file of the second network element from the NRF network element.

Step 705 to step 711 are similar to step 506 to step 512 in the example shown in FIG. 5, and reference may be made to each other for details, and details are not repeated here.

It should be understood that the examples shown in Figs. 5-7 above only show some possible communication methods. Some steps in the examples are only some of the possibilities, and there are other possible implementation methods. Reference may be made to the related descriptions in the embodiments shown in FIGS. 2 to 4, which are not listed here as examples.

It should be noted that the examples shown in Figures 5 to 7 only show the communication flow in the case of reselecting the serving network element after the second network element is overloaded. Of course, in the case where the reselecting of the serving network element is not supported Next, the first network element continues to send service requests to the second network element at a reduced rate. Specific examples will not be listed here, and specific descriptions involved in the embodiments shown in Figures 2 to 4 can be described. .

Based on the same inventive concept as the method embodiment, the embodiment of the present application also provides a device, which is applied to the first network element. The device may specifically be a processor in the first network element, or a chip or a chip system, or a functional module. Referring to FIG. 8, the apparatus 800 may include a processing unit 801 and a sending unit 802, and optionally may also include a receiving unit 803. The receiving unit 803 is used for the device 800 to receive information, the sending unit 801 is used for the device 800 to send information, and the processing unit 802 is used for controlling and managing the actions of the device 800. The processing unit 802 may also be used to indicate the processing procedure involving the first network element in any of the foregoing embodiments and/or other procedures of the technical solution described in this application. Specifically, the processing unit 802 can control the receiving unit 803 and control the steps performed by the sending unit 801. For details, refer to the foregoing embodiment, and the repetitive parts will not be repeated here.

In terms of hardware implementation, the aforementioned processing unit 802 can be a processor or a processing circuit, etc.; the sending unit 801 can be a transmitter or a sending circuit, etc., the receiving unit 803 can be a receiver or a receiving circuit, etc., and the sending unit 801 and the receiving unit 803 can be Form a transceiver.

Based on the same inventive concept as the method embodiment, the embodiment of the present application also provides a device, which is applied to the second network element. The device may specifically be a processor in the second network element, or a chip or a chip system, or a functional module. Referring to FIG. 9, the device 900 may include a processing unit 901 and a sending unit 902, and optionally may also include a receiving unit 903. The receiving unit 903 is used for the device 900 to receive information, the sending unit 902 is used for the device 900 to send information, and the processing unit 901 is used for controlling and managing the actions of the device 900. The processing unit 901 may also be used to indicate the processing procedure involving the first network element in any of the foregoing embodiments and/or other procedures of the technical solution described in this application. Specifically, the processing unit 901 can control the receiving unit 903 and the steps performed by the sending unit 902. For details, refer to the above-mentioned embodiment, and the repetitive parts will not be repeated here.

In terms of hardware implementation, the aforementioned processing unit 901 can be a processor or a processing circuit, etc.; the sending unit 902 can be a transmitter or a sending circuit, etc., the receiving unit 903 can be a receiver or a receiving circuit, etc., and the sending unit 902 and the receiving unit 903 can be Form a transceiver.

Based on the same inventive concept as the method embodiment, the embodiment of the present application also provides a device, which is applied to a network storage function network element. The device may specifically be a processor in a network storage function network element, or a chip or a chip system, or a functional module. Referring to FIG. 10, the apparatus 1000 may include a receiving unit 1001 and a processing unit 1002, and optionally may also include a sending unit 1003. The receiving unit 1001 is used for the device 1000 to receive information, the sending unit 1003 is used for the device 1000 to send information, and the processing unit 1002 is used for controlling and managing the actions of the device 1000. The processing unit 1002 may also be used to indicate the processing process of a network storage function network element (such as NRF) in any of the foregoing embodiments and/or other processes of the technical solution described in this application. Specifically, the processing unit 1002 can control the receiving unit 1001 and control the steps performed by the sending unit 1003. For details, refer to the above-mentioned embodiment, and the repetition will not be repeated here.

In terms of hardware implementation, the aforementioned processing unit 1002 can be a processor or a processing circuit, etc.; the sending unit 1003 can be a transmitter or a sending circuit, etc., the receiving unit 1001 can be a receiver or a receiving circuit, etc., and the sending unit 1003 and the receiving unit 1001 can be Form a transceiver.

Based on the same inventive concept as the method embodiment, an embodiment of the present application also provides a device, which is applied to a third network element. The device may specifically be a processor in a third network element, or a chip or a chip system, or a functional module. Referring to FIG. 11, the apparatus 1100 may include a receiving unit 1101 and a processing unit 1102. The receiving unit 1101 is used for the device 1100 to receive information, and the processing unit 1102 is used for controlling and managing the actions of the device 1100. The processing unit 1102 may also be used to indicate the processing procedure involving the third network element in any of the foregoing embodiments and/or other procedures of the technical solution described in this application. Specifically, the processing unit 1102 may control the steps performed by the receiving unit 1101. For details, please refer to the foregoing embodiment, and the repetitions are not repeated here.

In terms of hardware implementation, the aforementioned processing unit 1102 may be a processor or a processing circuit, etc.; the receiving unit 1101 may be a receiver or a receiving circuit, etc.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including a number of instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

Based on the above embodiments, the embodiments of the present application also provide a first network element for implementing the communication method. Referring to FIG. 12, the first network element 1200 may include a transceiver 1201 and a processor 1202. Optionally, the first network element 1200 may further include a memory 1203. Wherein, the memory 1203 may be provided inside the first network element 1200, and may also be provided outside the first network element 1200. Wherein, the processor 1202 controls the transceiver 1201 to receive and send data, and is used to implement the method executed by the first network element in FIGS. 2 and 4 to 7.

Specifically, the processor 1202 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor 1202 may further include a hardware chip. The aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The aforementioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (generic array logic, GAL), or any combination thereof.

Wherein, the transceiver 1201, the processor 1202, and the memory 1203 are connected to each other. Optionally, the transceiver 1201, the processor 1202, and the memory 1203 are connected to each other through a bus 1204; the bus 1204 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure (Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used to represent in FIG. 12, but it does not mean that there is only one bus or one type of bus.

In an optional implementation manner, the memory 1203 is used to store programs and the like. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 1203 may include RAM, or may also include non-volatile memory, such as one or more disk memories. The processor 1202 executes the application program stored in the memory 1203 to implement the above-mentioned functions, thereby implementing the communication method provided in the embodiment of the present application.

Exemplarily, when the first network element is used to implement the communication method shown in FIG. 2, it may specifically include:

The transceiver 1201 is used to receive and send data;

The processor 1202 is configured to determine whether a service network element needs to be reselected after determining that the second network element is in an overload state, the second network element is a service network element currently providing services for the first network element;

When it is determined that the service network element needs to be reselected, the third network element is determined, and the transceiver 1201 is controlled to send a service request message to the third network element;

Or, when it is determined that there is no need to reselect the serving network element, control the transceiver 1201 to reduce the rate of sending the service request message to the second network element.

In an optional implementation manner, the processor 1202 is specifically configured to: when determining that the second network element is in an overload state:

After controlling the transceiver 1201 to send the service request message to the second network element, control the transceiver 1201 to receive an overload indication message from the second network element, where the overload indication message is used to indicate the first network element The second network element is currently overloaded; or

Obtain the configuration file of the second network element, and determine that the second network element is in an overload state according to the configuration file of the second network element; or

When controlling the transceiver 1201 to obtain the configuration file of the second network element from a network storage function network element fails, it is determined that the second network element is in an overload state.

In an optional implementation manner, the processor 1202 is specifically configured to: when determining that the serving network element needs to be reselected,

Acquire first indication information, where the first indication information is used to indicate that the second network element supports reselecting a serving network element.

In an optional implementation manner, the processor 1202 is specifically configured to: when acquiring the first indication information:

After controlling the transceiver 1201 to send a service request message to the second network element, receive a rejection message from the second network element, where the rejection message includes the first indication information; or

Control the transceiver 1201 to receive a first message from the second network element, where the first message includes the first indication information; or

Acquire the configuration file of the second network element, where the configuration file of the second network element includes the first indication information.

In an optional implementation manner, the first indication information is an identifier of a network element set where the second network element is located.

In an optional implementation manner, the processor 1202 is specifically configured to: when determining the third network element:

After controlling the transceiver 1201 to send the service request message to the second network element, receive a rejection message from the second network element, where the rejection message includes the identification information of the third network element; The identification information of the third network element determines the third network element; or

According to the identifier of the network element set where the second network element is located, at least one candidate network element in the network element set that is not overloaded is obtained from the network storage function network element; in the at least one candidate network element Determine the third network element in; or

Control the transceiver 1201 to send the identification of the network element set to the network storage function, and control the transceiver 1201 to receive the configuration files of all network elements in the network element set from the network storage function; The configuration information of all network elements in the network element set, and determine the third network element in a non-overloaded state; or

When all the network elements in the network element set are in an overload state, the third network element is determined in at least one network element with the same function as the second network element.

In an optional implementation manner, the processor 1202 is specifically configured to: when controlling the transceiver 1201 to send the service request message to the third network element:

Generating a resource identifier corresponding to the third network element;

Control the transceiver 1201 to send the service request message to the third network element according to the resource identifier corresponding to the third network element.

In an optional implementation manner, the processor 1202 is specifically configured to: when generating the identifier corresponding to the third network element:

When the third network element is included in the network element set where the second network element is located, the third network element is generated according to the resource identifier corresponding to the second network element and the identifier of the third network element The resource identifier corresponding to the network element.

In an optional implementation manner, the processor 1202 controls the service request message sent by the transceiver 1201 to the third network element to include the resource identifier or the resource identifier corresponding to the second network element. At least one of the identifiers of the second network element.

In an optional implementation manner, the processor 1202 is specifically configured to: when controlling the transceiver 1201 to reduce the rate of sending the service request message to the second network element:

Determine the reduced rate when the first network element sends the service request message to the second network element;

Control the transceiver 1201 to send the service request message to the second network element at the reduced rate.

In an optional implementation manner, the processor 1202, when determining the reduced rate when the first network element sends the service request message to the second network element, is specifically configured to:

After controlling the transceiver 1201 to send the service request message to the second network element, receive a rejection message from the second network element, where the rejection message includes second indication information, and the second indication information is used Indicating the reduced rate; determining the reduced rate according to the second indication information; or

Acquire a configuration file of the second network element, where the configuration file includes indication information indicating the reduced rate when the second network element receives a service request message; according to the indication information indicating the reduced rate Determine the reduced rate.

Based on the foregoing embodiment, an embodiment of the present application also provides a second network element for implementing the foregoing communication method. Referring to FIG. 13, the second network element 1300 may include a transceiver 1301 and a processor 1302. Optionally, the second network element 1300 may further include a memory 1303. Wherein, the memory 1303 may be provided inside the second network element 1300, and may also be provided outside the second network element 1300. The processor 1302 controls the transceiver 1301 to receive and send data, and is used to implement the method executed by the second network element in FIGS. 3 to 7.

Specifically, the processor 1302 may be a CPU, an NP, or a combination of a CPU and NP. The processor 1302 may further include a hardware chip. The above hardware chip can be ASIC, PLD or a combination thereof. The above PLD can be CPLD, FPGA, GAL or any combination thereof.

Wherein, the transceiver 1301, the processor 1302, and the memory 1303 are connected to each other. Optionally, the transceiver 1301, the processor 1302, and the memory 1303 are connected to each other through a bus 1304; the bus 1304 may be a PCI bus or an EISA bus. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in FIG. 13, but it does not mean that there is only one bus or one type of bus.

In an optional implementation manner, the memory 1303 is used to store programs and the like. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 1303 may include RAM, or may also include non-volatile memory, such as one or more disk memories. The processor 1302 executes the application program stored in the memory 1303 to implement the foregoing functions, thereby implementing the communication method provided in the embodiment of the present application.

Based on the foregoing embodiment, the embodiment of the present application also provides a network storage function network element for implementing the foregoing communication method. Referring to FIG. 14, the network storage function network element 1400 may include a transceiver 1401 and a processor 1402. Optionally, the network storage function network element 1400 may further include a memory 1403. Wherein, the storage 1403 may be disposed inside the network storage function network element 1400, or may be disposed outside the network storage function network element 1400. Wherein, the processor 1402 controls the transceiver 1401 to receive and send data, and is used to implement the method executed by the network storage function network element (such as NRF) in FIG. 3 and FIG. 5-7.

Specifically, the processor 1402 may be a CPU, an NP, or a combination of a CPU and NP. The processor 1402 may further include a hardware chip. The above hardware chip can be ASIC, PLD or a combination thereof. The above PLD can be CPLD, FPGA, GAL or any combination thereof.

Wherein, the transceiver 1401, the processor 1402, and the memory 1403 are connected to each other. Optionally, the transceiver 1401, the processor 1402, and the memory 1403 are connected to each other through a bus 1404; the bus 1404 may be a PCI bus or an EISA bus. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 14, but it does not mean that there is only one bus or one type of bus.

In an optional implementation manner, the memory 1403 is used to store programs and the like. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 1403 may include RAM, or may also include non-volatile memory, such as one or more disk memories. The processor 1402 executes the application program stored in the memory 1403 to implement the aforementioned functions, thereby implementing the communication method provided in the embodiment of the present application.

Based on the above embodiments, the embodiments of the present application also provide a third network element for implementing the above communication method. Referring to FIG. 15, the third network element 1500 may include a transceiver 1501 and a processor 1502. Optionally, the third network element 1500 may further include a memory 1503. Wherein, the memory 1503 may be provided inside the third network element 1500, and may also be provided outside the third network element 1500. Wherein, the processor 1502 controls the transceiver 1501 to receive and send data, and is used to implement the method executed by the third network element in FIGS. 4-7.

Specifically, the processor 1502 may be a CPU, an NP, or a combination of a CPU and NP. The processor 1502 may further include a hardware chip. The above hardware chip can be ASIC, PLD or a combination thereof. The above PLD can be CPLD, FPGA, GAL or any combination thereof.

Wherein, the transceiver 1501, the processor 1502, and the memory 1503 are connected to each other. Optionally, the transceiver 1501, the processor 1502, and the memory 1503 are connected to each other through a bus 1504; the bus 1504 may be a PCI bus or an EISA bus. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only a thick line is used in FIG. 15, but it does not mean that there is only one bus or one type of bus.

In an optional implementation manner, the memory 1503 is used to store programs and the like. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 1503 may include RAM, or may also include non-volatile memory, such as one or more disk memories. The processor 1502 executes the application program stored in the memory 1503 to implement the above-mentioned functions, thereby implementing the communication method provided in the embodiment of the present application.

Based on the above embodiments, the embodiments of the present application also provide a computer storage medium, the storage medium stores a software program, and when the software program is read and executed by one or more processors, any one or more of the above The method provided by the embodiment. The computer storage medium may include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.

Based on the above embodiments, the embodiments of the present application also provide a chip, which includes a processor, which is used to implement the functions involved in any one or more of the above embodiments, such as acquiring or processing the information involved in the above methods or news. Optionally, the chip further includes a memory, and the memory is used for necessary program instructions and data executed by the processor. The chip can be composed of a chip, or it can include a chip and other discrete devices.

Those skilled in the art should understand that the embodiments of the present application can 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 combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to the embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the scope of the embodiments of the present application. In this way, if these modifications and variations of the embodiments of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that it comprises:

After the first network element determines that the second network element is in an overload state, it determines whether a service network element needs to be reselected, and the second network element is a service network element currently providing services for the first network element;

When the first network element determines that a service network element needs to be reselected, the first network element determines a third network element, and sends a service request message to the third network element;

Alternatively, when the first network element determines that there is no need to reselect a serving network element, the first network element reduces the rate of sending the service request message to the second network element.
The method according to claim 1, wherein the determining by the first network element that the second network element is in an overload state comprises:

After the first network element sends the service request message to the second network element, it receives an overload indication message from the second network element, where the overload indication message is used to indicate that the second network element is currently overloaded Status; or

Acquiring, by the first network element, a configuration file of the second network element, and the first network element determines that the second network element is in an overload state according to the configuration file of the second network element; or

When the first network element fails to obtain the configuration file of the second network element from the network storage function network element, the first network element determines that the second network element is in an overload state.
The method according to claim 1 or 2, wherein the determining that the first network element needs to reselect a serving network element comprises:

The first network element obtains first indication information, where the first indication information is used to indicate that the second network element supports reselection of a serving network element.
The method according to claim 3, wherein acquiring the first indication information by the first network element comprises:

After the first network element sends a service request message to the second network element, receiving a rejection message from the second network element, where the rejection message includes the first indication information; or

The first network element receives a first message from the second network element, and the first message includes the first indication information; or

The first network element obtains the configuration file of the second network element, and the configuration file of the second network element includes the first indication information.
The method according to claim 3 or 4, wherein the first indication information is an identifier of a network element set where the second network element is located.
5. The method according to any one of claims 1-5, wherein the determining of the third network element by the first network element comprises:

After the first network element sends the service request message to the second network element, it receives a rejection message from the second network element, where the rejection message includes the identification information of the third network element; The first network element determines the third network element according to the identification information of the third network element; or

The first network element obtains at least one candidate network element in the non-overloaded state in the network element set from the network storage function network element according to the identifier of the network element set where the second network element is located; A network element determines the third network element among the at least one candidate network element; or

The first network element sends the identification of the network element set to the network storage function, and receives the configuration files of all network elements in the network element set from the network storage function; The configuration information of all network elements in the network element set, and determine the third network element in a non-overloaded state; or

When all network elements in the network element set are in an overload state, the first network element determines the third network element in at least one network element with the same function as the second network element.
7. The method according to any one of claims 1 to 6, wherein the sending of the service request message by the first network element to the third network element comprises:

Generating, by the first network element, a resource identifier corresponding to the third network element;

The first network element sends the service request message to the third network element according to the resource identifier corresponding to the third network element.
The method according to claim 7, wherein the first network element generating the identifier corresponding to the third network element comprises:

When the third network element is included in the network element set where the second network element is located, the first network element is based on the resource identifier corresponding to the second network element and the identifier of the third network element To generate a resource identifier corresponding to the third network element.
The method according to any one of claims 1-8, wherein the service request message sent by the first network element to the third network element includes a resource identifier corresponding to the second network element Or at least one of the identifier of the second network element.
The method according to any one of claims 1-9, wherein the first network element reducing the rate of sending the service request message to the second network element comprises:

Determining, by the first network element, the reduced rate when the first network element sends the service request message to the second network element;

The first network element sends the service request message to the second network element at the reduced rate.
The method of claim 10, wherein the first network element determining the reduced rate when the first network element sends the service request message to the second network element comprises:

After the first network element sends the service request message to the second network element, it receives a rejection message from the second network element, where the rejection message includes second indication information, and the second indication information is used Indicating the reduced rate; the first network element determines the reduced rate according to the second indication information; or

The first network element obtains a configuration file of the second network element, where the configuration file includes indication information indicating the reduced rate when the second network element receives a service request message; the first network The element determines the reduced rate according to the indication information indicating the reduced rate.
A first network element, characterized in that it comprises:

Transceiver, used to receive and send data;

A processor, configured to determine whether a service network element needs to be reselected after determining that the second network element is in an overload state, where the second network element is a service network element currently providing services for the first network element;

When it is determined that the service network element needs to be reselected, the third network element is determined, and the transceiver is controlled to send a service request message to the third network element;

Or, when it is determined that there is no need to reselect the serving network element, control the transceiver to reduce the rate of sending the service request message to the second network element.
The first network element according to claim 12, wherein the processor is specifically configured to: when determining that the second network element is in an overload state:

After controlling the transceiver to send the service request message to the second network element, control the transceiver to receive an overload indication message from the second network element, where the overload indication message is used to instruct the second network element The element is currently overloaded; or

Obtain the configuration file of the second network element, and determine that the second network element is in an overload state according to the configuration file of the second network element; or

When controlling the transceiver to obtain the configuration file of the second network element from the network storage function network element fails, it is determined that the second network element is in an overload state.
The first network element according to claim 12 or 13, wherein the processor is specifically configured to: when it is determined that the serving network element needs to be reselected:

Acquire first indication information, where the first indication information is used to indicate that the second network element supports reselecting a serving network element.
The first network element according to claim 14, wherein the processor, when acquiring the first indication information, is specifically configured to:

After controlling the transceiver to send a service request message to the second network element, receive a rejection message from the second network element, where the rejection message includes the first indication information; or

Controlling the transceiver to receive a first message from the second network element, where the first message includes the first indication information; or

Acquire the configuration file of the second network element, where the configuration file of the second network element includes the first indication information.
The first network element according to claim 14 or 15, wherein the first indication information is an identifier of a network element set where the second network element is located.
The first network element according to any one of claims 12-16, wherein the processor is specifically configured to: when determining the third network element:

After controlling the transceiver to send the service request message to the second network element, it receives a rejection message from the second network element, where the rejection message includes the identification information of the third network element; The identification information of the third network element determines the third network element; or

According to the identifier of the network element set where the second network element is located, at least one candidate network element in the network element set that is not overloaded is obtained from the network storage function network element; in the at least one candidate network element Determine the third network element in; or

Control the transceiver to send the identification of the network element set to the network storage function, and control the transceiver to receive the configuration files of all network elements in the network element set from the network storage function; The configuration information of all network elements in the element set is determined to be the third network element in a non-overloaded state; or

When all the network elements in the network element set are in an overload state, the third network element is determined in at least one network element with the same function as the second network element.
The first network element according to any one of claims 12-17, wherein the processor is specifically configured to control the transceiver to send the service request message to the third network element :

Generating a resource identifier corresponding to the third network element;

Controlling the transceiver to send the service request message to the third network element according to the resource identifier corresponding to the third network element.
The first network element according to claim 18, wherein the processor is specifically configured to: when generating the identifier corresponding to the third network element:

When the third network element is included in the network element set where the second network element is located, the third network element is generated according to the resource identifier corresponding to the second network element and the identifier of the third network element The resource identifier corresponding to the network element.
The first network element according to any one of claims 12-19, wherein the processor controls the transceiver to send the service request message to the third network element to include the second network element. At least one of the resource identifier corresponding to the network element or the identifier of the second network element.
The first network element according to any one of claims 12-20, wherein the processor, when controlling the transceiver to reduce the rate of sending the service request message to the second network element, Specifically used for:

Determine the reduced rate when the first network element sends the service request message to the second network element;

Controlling the transceiver to send the service request message to the second network element at the reduced rate.
The first network element according to claim 21, wherein the processor, when determining the reduced rate when the first network element sends the service request message to the second network element, specifically Used for:

After controlling the transceiver to send the service request message to the second network element, receive a rejection message from the second network element, where the rejection message includes second indication information, and the second indication information is used for Indicating the reduced rate; determining the reduced rate according to the second indication information; or

Acquire a configuration file of the second network element, where the configuration file includes indication information indicating the reduced rate when the second network element receives a service request message; according to the indication information indicating the reduced rate Determine the reduced rate.
A communication method, characterized in that it comprises:

The second network element determines that it is in an overload state;

The second network element sends a first update request message to the network storage function network element, where the first update request message is used to instruct the network storage function network element to update the state of the second network element to an overload state.
A communication method, characterized in that it comprises:

The network storage function network element receives a first update request message from the second network element, where the first update request message is used to instruct the network storage function network element to update the state of the second network element to an overload state;

The network storage function network element updates the state of the second network element in the configuration file of the second network element from a non-overloaded state to an overloaded state according to the first update request message.
A communication method, characterized in that it comprises:

The third network element receives a service request message from the first network element; the third network element is the service network element reselected by the first network element; the service request message includes the resource identifier corresponding to the second network element Or at least one of the identifiers of the second network element;

The third network element obtains the service context from the second network element according to at least one of an identifier corresponding to the second network element or an identifier of the second network element.
A device, the device being a first network element, characterized by comprising: a sending unit and a processing unit;

The sending unit is configured to perform data sending operations on the device side in the method according to any one of claims 1-11;

The processing unit is configured to execute the method according to any one of claims 1-11.
A device, the device being a second network element, characterized by comprising: a sending unit and a processing unit;

The processing unit is used to determine that it is in an overload state;

The sending unit is configured to send a first update request message to a network storage function network element, where the first update request message is used to instruct the network storage function network element to update the state of the second network element to an overload state .
A device, the device is a network storage function network element, characterized by comprising: a receiving unit and a processing unit;

The receiving unit is configured to receive a first update request message from a second network element, where the first update request message is used to instruct the network storage function network element to update the state of the second network element to an overload state;

The processing unit is configured to update the state of the second network element in the configuration file of the second network element from a non-overloaded state to an overloaded state according to the first update request message.
A device, the device being a third network element, characterized by comprising: a receiving unit and a processing unit;

The receiving unit is configured to receive a service request message from a first network element; the third network element is a service network element reselected by the first network element; and the service request message includes a service request message corresponding to the second network element At least one of a resource identifier or an identifier of the second network element;

The processing unit is configured to obtain the service context from the second network element according to at least one of an identifier corresponding to the second network element or an identifier of the second network element.
A device, the device being a second network element, characterized by comprising:

Transceiver, used to receive and send data;

The processor is configured to execute the method of claim 23.
A device, the device is a network storage function network element, characterized by comprising:

Transceiver, used to receive and send data;

The processor is configured to execute the method of claim 24.
A device, the device being a third network element, characterized by comprising:

Transceiver, used to receive and send data;

The processor is configured to execute the method of claim 25.
A device, characterized in that it is used to execute the method of any one of claims 1-11.
A device, characterized in that it is used to implement the method of claim 23.
A device, characterized in that it is used to execute the method of claim 24.
A device, characterized in that it is used to implement the method of claim 25.
A computer program product containing instructions, characterized in that, when the computer program product runs on a computer, the computer is caused to execute the method according to any one of claims 1-11, 23-25.
A computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, which when called by a computer, cause the computer to execute , The method of any one of 23-25.
A chip, characterized in that the chip is coupled with 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 1-11, 23-25.
A system, characterized by comprising one or more of the first network element according to any one of claims 12-22 or the device according to any one of 26-36.