WO2019174437A1

WO2019174437A1 - Address management method, device and system

Info

Publication number: WO2019174437A1
Application number: PCT/CN2019/075445
Authority: WO
Inventors: 孙德奎
Original assignee: 华为技术有限公司
Priority date: 2018-03-12
Filing date: 2019-02-19
Publication date: 2019-09-19
Also published as: CN110266826B; CN110266826A

Abstract

The embodiment of the present application provides an address management method, device and system, for solving the problem that an IP address is repeatedly allocated to different PDU sessions and effectively utilizing IP addresses in an address pool. The method comprises: a session management network element determines that an address resource, in the session management network element, corresponding to first information is insufficient, wherein the first information includes information of one or more tracking areas (TA), or at least one of one or more data network names (DNN); and the session management network element sends a first notification message to a network device, wherein the first notification message is used for indicating that the address resource, in the session management network element, corresponding to the first information is insufficient.

Description

Address management method, device and system

This application claims priority to Chinese Patent Application No. 201810201012.9, entitled "Address Management Method, Equipment and System", filed on March 12, 2018, the entire contents of which are incorporated herein by reference. In the application.

Technical field

The present application relates to the field of communications technologies, and in particular, to an address management method, device, and system.

Background technique

In the existing 5th generation (5G) network architecture, a session management function (SMF) network element can control multiple user plane function (UPF) network elements, and at the same time, one The UPF network element can be controlled by multiple SMF network elements.

In a scenario in which a UPF network element is controlled by multiple SMF network elements, downlink data belonging to different packet data unit (PDU) sessions in a data network (DN) is passed through corresponding PDUs. The tunnel corresponding to the session is sent to the terminal, and different Internet Protocol (IP) addresses need to be assigned to different PDU sessions. Otherwise, the UPF network element cannot distinguish the downlink data whose destination address is the same IP address. The tunnel is sent to the terminal.

To solve the above problem, the prior art provides an address management method for segmenting an IP address pool corresponding to a UPF network element. For example, if a UPF network element is connected to three SMF network elements, the IP address pool corresponding to the UPF network element can be divided into three different segments, which are respectively configured on three different SMF network elements. In this way, since different SMF network elements are configured with different IP address segments, IP addresses allocated by different SMF network elements to different PDU sessions do not overlap.

However, although the foregoing method can avoid the problem of duplicate IP addresses allocated to different PDU sessions, if the number of SMF network elements is large, or the number of IP addresses in the IP address pool corresponding to the UPF network element is limited, it may result in The IP address cannot be used effectively. For example, if the IP address in the IP address segment configured on the SMF1 network element is exhausted, but the IP address segment configured on the other SMF network element still has an unused IP address, if SMF1 is selected. If the NE is served by the PDU, the terminal will still be unable to access the IP address of the UPF NE.

Therefore, when a UPF network element is controlled by multiple SMF network elements, how to perform address management, so that the problem of duplicate IP addresses assigned to different PDU sessions can be avoided, and the IP address in the address pool can be effectively utilized. The problem that needs to be solved now.

Summary of the invention

The embodiment of the present application provides an address management method, device, and system, so that not only the problem of duplicate IP addresses allocated to different PDU sessions but also the IP address in the address pool can be effectively utilized.

To achieve the above objective, the embodiment of the present application adopts the following technical solutions:

The first aspect provides an address management method, where the method includes: the session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, wherein the first information includes one or more traces. At least one of the information of the area TA or the one or more data network names DNN; the session management network element sends a first notification message to the network device, where the first notification message is used to indicate that the session management network element is associated with the first The address resource corresponding to a message is insufficient. Based on the solution, the session management network element sends the first notification message to the network device, so that the network device can learn the state of the address resource corresponding to the first information in the session management network element, and therefore can be selected in the subsequent terminal session establishment process. When the session management network element is used, the session management network element with insufficient address resources is circumvented according to the state of the address resource, and the session management network element with sufficient address resources is selected, so that the problem of duplicate IP addresses assigned to different sessions can be avoided, and You can effectively use the IP address in the address pool.

In a possible design, the session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, including: after the session management network element allocates an Internet Protocol IP address to the first terminal, The session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, wherein the information of the one or more TAs includes information of the TA corresponding to the first terminal, the one or more The DNNs corresponding to the first terminal are included in the DNNs.

In a possible design, the network device includes a first mobility management network element serving the first terminal; the method further includes: the session management network element storing the identifier of the first mobility management network element to the notified a mobile management network element list, wherein the notified mobile management network element list includes the mobile management network element that the session management network element has notified that the address resource corresponding to the first information in the session management network element is insufficient Logo. Based on the solution, the session management network element can store the notified mobile management network element list, so that the corresponding mobile management network element can be notified in time when the address resource corresponding to the first information is sufficient, so that the mobile management network element is When the session management network element is selected in the subsequent terminal session establishment process, the session management network element may be selected.

In a possible design, before the session management network element stores the identifier of the first mobility management network element in the notified mobile management network element list, the method further includes: the session management network element creates the notified Mobile management NE list. That is, in the embodiment of the present application, the address resource corresponding to the first information may be sufficient. After the session management network element allocates an IP address to the first terminal, the address resource becomes insufficient, and thus needs to be created. Notify the mobile management NE list.

In another possible design, before the session management network element stores the identifier of the first mobility management network element in the notified mobile management network element list, the method further includes: the session management network element is the second After the terminal allocates the IP address, the session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, and the information of the one or more TAs includes the TA corresponding to the second terminal. Information, the one or more DNNs include a DNN corresponding to the second terminal; the session management network element sends the first notification message to a second mobility management network element serving the second terminal; the session management network element is created The mobile management network element list has been notified. That is, in the embodiment of the present application, the address resource corresponding to the first information may have insufficiently existed before the IP address is allocated to the first terminal, but the first mobility management network element does not know the session management network element. The address resource corresponding to the first information has not appeared enough.

In a possible design, the method further includes: the session management network element determining that the address resource corresponding to the first information in the session management network element is sufficient; the session management network element is notified to the notified mobile management network element list The mobility management network element corresponding to the identifier of the mobility management network element sends a second notification message, where the second notification message is used to indicate that the address resource corresponding to the first information in the session management network element is sufficient. In other words, in the embodiment of the present application, when the address resource corresponding to the first information is sufficient, the corresponding mobility management network element may be notified in time, so that the mobility management network element selects the session management network in the subsequent terminal session establishment process. In the meta-time, you can select the session management NE.

In a possible design, the network device includes a mobility management network element or a network function storage network element connected by the session management network element; the method further includes: the session management network element determining the session management network element and the first The address resource corresponding to the information is sufficient; the session management network element sends a second notification message to the network device, where the second notification message is used to indicate that the address resource corresponding to the first information in the session management network element is sufficient. That is, in the embodiment of the present application, when the address resource corresponding to the first information is sufficient, the corresponding network device may be notified in time, so that the network device can select the session management network element in the subsequent terminal session establishment process. Select the session management NE.

In a possible design, the information of the one or more TAs includes information of a TA corresponding to the third terminal, where the one or more DNNs include a DNN corresponding to the third terminal; and the session management network element determines Before the address resource corresponding to the first information in the session management network element is sufficient, the method further includes: releasing, by the session management network element, an IP address allocated for the third terminal.

In a possible design, the address resource corresponding to the first information in the session management network element is insufficient, and the ratio of available address resources in the address resource corresponding to the first information in the session management network element is less than or equal to a first preset value; the address resource corresponding to the first information in the session management network element is sufficient, and the ratio of the available address resources in the address resource corresponding to the first information in the session management network element is greater than or equal to the second pre- A value is set, wherein the first preset value is less than or equal to the second preset value.

In a possible design, the second notification message carries the first information and the address sufficient indication; or the second notification message carries the identifier, the first information, and the address sufficient indication of the session management network element.

In a possible design, the first notification message carries the first information and the address insufficient indication; or the first notification message carries the identifier of the session management network element, the first information, and the address insufficient indication.

A second aspect provides an address management method, where the method includes: receiving, by a network device, a first notification message from a first session management network element, where the first notification message is used to indicate that the first session management network element is The address resource corresponding to the information is insufficient, wherein the first information includes information of one or more tracking areas TA, or at least one of one or more data network names DNN; the network device stores the first session management network The information of the address resource corresponding to the first information in the meta is insufficient. Based on the solution, the network device can learn the state of the address resource corresponding to the first information in the first session management network element, and therefore, when the session management network element is selected in the subsequent terminal session establishment process, according to the state of the address resource, The session management network element with insufficient address resources is selected, and the session management network element with sufficient address resources is selected, so that the problem of duplicate IP addresses assigned to different sessions can be avoided, and the IP address in the address pool can be effectively utilized.

In a possible design, the first session management network element includes a session management network element serving the first terminal; correspondingly, the information of the one or more TAs includes information of the TA corresponding to the first terminal, The DNN corresponding to the first terminal is included in the one or more DNNs.

In a possible design, the network device includes a first mobility management network element serving the first terminal; the method further comprising: the first mobility management network element receiving a session establishment request from the second terminal, the session The establishment request carries the second information, where the second information includes at least one of the information of the TA corresponding to the second terminal or the DNN corresponding to the second terminal; the first mobility management network element is configured according to the second information, and the second information The information that the one or more address resources are insufficient, and the second session management network element is selected to serve the second terminal, where the one or more address resources include one or more session management network elements and include the second information. The information corresponding to the address resource. Based on the solution, the first mobility management network element can learn the state of the address resource corresponding to the first information in the first session management network element, and therefore, when the session management network element is selected in the subsequent terminal session establishment process, according to the address The state of the resource, the session management network element that circumvents the insufficient address resources, and the session management network element with sufficient address resources, can avoid the problem of duplicate IP addresses assigned to different sessions, and can effectively utilize the IP in the address pool. address.

In a possible design, the network device includes a network function storage network element; the method further includes: the network function storage network element receiving a request message from a second mobility management network element serving the second terminal, the request message Carrying the second information, where the second information includes at least one of the information of the TA corresponding to the second terminal or the DNN corresponding to the second terminal; the network function stores the network element according to the second information, and one or more stored Determining an available list of session management network elements, wherein the one or more address resources include address resources corresponding to information including the second information in one or more session management network elements; The network function storage network element sends the available session management network element list to the second mobility management network element, where the available session management network element list is used to select the second session management network element to serve the second terminal. Based on the solution, the network function storage network element can learn the state of the address resource corresponding to the first information in the first session management network element, and therefore, according to the address resource, when the session management network element is selected in the subsequent terminal session establishment process. The state of the session management network element that avoids insufficient address resources, and selects the session management network element with sufficient address resources, thereby avoiding the problem of duplicate IP addresses assigned to different sessions, and effectively utilizing the IP address in the address pool. .

In a possible design, the available session management network element list includes the second session management network element, and the address resource corresponding to the third information in the second session management network element is sufficient, wherein the third information is sufficient. Information including one or more TAs, or at least one of one or more DNNs, the second information being included in the third information.

In a possible design, the method further includes: receiving, by the network device, a second notification message from the first session management network element, where the second notification message is used to indicate that the first session management network element is related to the first The address resource corresponding to the information is sufficient; the network device deletes the stored information of the first session management network element that is insufficient for the address resource corresponding to the first information. In other words, in the embodiment of the present application, when the address resource corresponding to the first information is sufficient, the corresponding network device may be notified in time, so that the network device deletes the stored first session management network element and the first information. If the corresponding address resource is insufficient, the session management network element may be selected when the session management network element is selected in the subsequent terminal session establishment process.

In a third aspect, a session management network element is provided, the session management network element having the function of implementing the method of any of the above first aspects. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

A fourth aspect provides a session management network element, including: a processor and a memory; the memory is configured to store a computer execution instruction, and when the session management network element is running, the processor executes the computer execution instruction stored by the memory The session management network element performs the address management method according to any of the above first aspects.

A fifth aspect provides a session management network element, including: a processor; the processor is configured to be coupled to a memory, and after reading an instruction in the memory, execute any one of the foregoing first aspects according to the instruction The address management method described.

In a sixth aspect, a computer readable storage medium having stored therein instructions that, when run on a computer, cause the computer to perform the address management of any of the above first aspects method.

According to a seventh aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the address management method of any of the above first aspects.

According to an eighth aspect, a chip system is provided, the chip system includes a processor, configured to support a session management network element to implement the functions involved in the foregoing first aspect, for example, determining an address corresponding to the first information in the session management network element. Not enough resources. In one possible design, the chip system further includes a memory for storing program instructions and data necessary for the session management network element. The chip system can be composed of chips, and can also include chips and other discrete devices.

For the technical effects brought by any one of the third aspect to the eighth aspect, refer to the technical effects brought by different design modes in the first aspect, and details are not described herein again.

In a ninth aspect, a network device is provided, the network device having the function of implementing the method of any of the above second aspects. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

According to a tenth aspect, a network device includes: a processor and a memory; the memory is configured to store a computer execution instruction, and when the network device is running, the processor executes the computer execution instruction stored in the memory to enable the The network device performs the address management method according to any of the above second aspects.

In an eleventh aspect, a network device is provided, comprising: a processor; the processor is configured to be coupled to a memory, and after reading an instruction in the memory, execute according to the instruction according to any one of the foregoing second aspects The address management method described.

A twelfth aspect, a computer readable storage medium having stored therein instructions that, when run on a computer, cause the computer to perform the address of any of the above second aspects Management method.

In a thirteenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the address management method of any of the above second aspects.

In a fourteenth aspect, a chip system is provided, the chip system comprising a processor for supporting a network device to implement the functions involved in the second aspect, for example, according to the second information, and the stored one or more address resources If the information is insufficient, the second session management network element is selected to serve the second terminal. In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the network device. The chip system can be composed of chips, and can also include chips and other discrete devices.

For the technical effects brought by any one of the ninth to fourteenth aspects, refer to the technical effects brought by different design modes in the second aspect, and details are not described herein again.

In a fifteenth aspect, an address management system is provided, including a session management network element and a network device. The session management network element is configured to determine that the address resource corresponding to the first information in the session management network element is insufficient, and send a first notification message to the network device, where the first notification message is used to indicate the session management. The address resource corresponding to the first information in the network element is insufficient, the first information includes information of one or more tracking areas TA, or at least one of one or more data network names DNN; and the network device is configured to receive from The first notification message of the session management network element.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

DRAWINGS

FIG. 1 is a schematic structural diagram of an address management system according to an embodiment of the present application;

2 is a schematic structural diagram of a 5G network according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of hardware of a communication device according to an embodiment of the present disclosure;

4 is a schematic diagram of a correspondence between an address resource and a TA according to an embodiment of the present application;

FIG. 5 is a schematic diagram of correspondence between address resources and DNs according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of correspondence between address resources and DN and TA according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart 1 of an address management method according to an embodiment of the present application;

FIG. 8 is a second schematic flowchart of an address management method according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a session management network element according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. In the description of the present application, unless otherwise stated, "/" means the meaning of or, for example, A/B may represent A or B; "and/or" herein is merely an association describing the associated object. The relationship indicates that there may be three kinds of relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. Also, in the description of the present application, "a plurality" means two or more than two unless otherwise stated. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", and the like are used to distinguish the same items or similar items whose functions and functions are substantially the same. Those skilled in the art can understand that the words "first", "second" and the like do not limit the number and execution order, and the words "first", "second" and the like are not necessarily limited.

In addition, the network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and are not limited to the technical solutions provided by the embodiments of the present application. With the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

As shown in FIG. 1 , an address management system 10 is provided in the embodiment of the present application. The address management system 10 includes a session management network element 101 and a network device 102.

The session management network element 101 is configured to determine that the address resource corresponding to the first information in the session management network element 101 is insufficient, and the first information includes information of one or more tracking areas (TAs), or one For example, at least one of the data network name (DNN) is described in detail in the following embodiments, and details are not described herein again.

The session management network element 101 is further configured to send a first notification message to the network device 102, where the first notification message is used to indicate that the address resource corresponding to the first information in the session management network element 101 is insufficient.

The network device 102 is configured to receive a first notification message from the session management network element 101.

Optionally, in the embodiment of the present application, the network device 102 is further configured to store information that the address management network element 101 has insufficient address resources corresponding to the first information, which is not specifically limited in this embodiment of the present application.

Optionally, the address resource in the embodiment of the present application is insufficient, and the ratio of the available address resources in the address resource is less than or equal to the first preset value; the sufficient address resource includes the ratio of the available address resources in the address resource is greater than or equal to the second pre-predetermined A value is set, wherein the first preset value is less than or equal to the second preset value.

Exemplarily, if both the first preset value and the second preset value are both 1%, if the ratio of the currently available address resources in an address resource is greater than or equal to 1%, then the address resource may be determined to be sufficient; After the IP address in the address resource is allocated to the terminal, the ratio of the currently available address resource in the address resource is less than 1%, and the address resource becomes insufficient at this time; if the subsequent terminal initiates the address release, the address resource is made. If the ratio of the available address resources is greater than or equal to 1%, then the address resource becomes sufficient; if the terminal is assigned an IP address in the address resource at this time, the proportion of available address resources in the address resource is If the value is less than 1%, the address resource becomes insufficient again, and the state of the address resource is frequently switched. This phenomenon is called a ping-pong effect.

Or, by way of example, assuming that the first preset value is 1% and the second preset value is 2%, that is, if there is a threshold interval, if the ratio of currently available address resources in an address resource is greater than 2%, then At this time, it can be determined that the address resource is sufficient; if the IP address in the address resource is allocated to one or more terminals, and the proportion of the currently available address resources in the address resource is continuously decreased to 1%, then the address resource becomes If the subsequent one or more terminals initiate address release, so that the proportion of available address resources in the address resource continues to increase to %2, the address resource becomes sufficient at this time. This threshold interval can be used to avoid ping-pong effects.

Optionally, the ratio of the foregoing address resources in the embodiment of the present application may also be replaced by the number of available address resources; or the ratio of unavailable address resources or the number of unavailable address resources may be used to represent sufficient address resources. The address resource is not sufficient, and the embodiment of the present application does not specifically limit this. The following embodiments of the present application are merely exemplary to determine whether the address resources are sufficient according to the ratio of available address resources, which are collectively described herein, and are not described herein again.

Optionally, the network device 102 in the embodiment of the present application may include, for example, a mobility management network element or a network function storage network element, which is not specifically limited in this embodiment of the present application.

Optionally, the session management network element 101 and the network device 102 in this embodiment may directly communicate with each other, and may also perform communication by forwarding of other devices, which is not specifically limited in this embodiment of the present application.

In the address management system provided by the embodiment of the present application, the network device can learn the state of the address resource corresponding to the first information in the session management network element, and therefore, when the session management network element is selected in the subsequent terminal session establishment process, The state of the address resource, the session management network element that circumvents the insufficient address resources, and the session management network element with sufficient address resources, thereby avoiding the problem of duplicate IP addresses assigned to different sessions, and effectively utilizing the address pool IP address.

Optionally, the address management system shown in FIG. 1 can be applied to the current 5G network and other networks in the future, which is not specifically limited in this embodiment of the present invention.

Illustratively, if the address management system shown in FIG. 1 can be applied to the current 5G network, as shown in FIG. 2, the network element or entity corresponding to the foregoing session management network element may be an SMF network element in the 5G network. The network element or the entity corresponding to the network function storage network element may be a network function repository function (NRF) network element in the 5G network, and the network element or entity corresponding to the foregoing mobility management network element may be It is an access and mobility management function (AMF) network element in a 5G network.

In addition, as shown in FIG. 2, the 5G network may further include an access device, a UPF network element, a unified data management (UDM) network element, a policy control function (PCF) network element, and an authentication. The embodiment of the present application does not specifically limit the network function of the authentication server function (AUSF).

As shown in FIG. 2, in the embodiment of the present application, the terminal accesses the 5G core network through the access device, and the terminal communicates with the AMF network element through the Next Generation (N)1 interface (N1). The device communicates with the AMF network element through the N2 interface (N2). The access device communicates with the UPF network element through the N3 interface (N3). The AMF network element communicates with the SMF network element through the N11 interface (N11). The AMF network element passes. The N8 interface (N8 for short) communicates with the UDM network element. The AMF network element communicates with the AUSF network element through the N12 interface (N12 for short). The AMF network element communicates with the PCF network element through the N15 interface (N15 for short), and the SMF network element passes the N7 interface. (N7) communicates with the PCF network element. The SMF network element communicates with the UPF network element through the N4 interface (N4). The NRF network element communicates with the UPF network element and the SMF network element respectively. The UPF network element passes the N6 interface (N6 for short). Access to the data network.

It should be noted that the name of the interface between the network elements in FIG. 2 is only an example. In the specific implementation, the interface name may be another name, which is not specifically limited in this embodiment of the present application.

It should be noted that the terminal, the access device, the NRF network element, the AMF network element, the SMF network element, the UPF network element, the AUSF network element, the UDM network element, or the PCF network element in FIG. 2 are only one name, and the name is The device itself is not limited. In the 5G network and other networks in the future, the network element or entity corresponding to the terminal, the access device, the AMF network element, the SMF network element, the UPF network element, the AUSF network element, the UDM network element, or the PCF network element may also be other The name of the application is not specifically limited in this embodiment. For example, the UPF network element may be replaced by a UPF or UPF entity; the UDM network element may also be replaced by a home subscriber server (HSS) or a user subscription database (USD) or a database entity. Etc., hereby make a unified explanation, the details are not described below.

Optionally, the terminal involved in the embodiment of the present application may include various handheld devices having wireless communication functions, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to the wireless modem; Including user unit (subscriber unit), cellular phone, smart phone, wireless data card, personal digital assistant (PDA) computer, tablet computer, wireless modem (modem), handheld device Handheld, laptop computer, cordless phone or wireless local loop (WLL) station, machine type communication (MTC) terminal, user equipment (user equipment) , UE), mobile station (MS), terminal device or relay user equipment. The relay user equipment may be, for example, a 5G residential gateway (RG). For convenience of description, in the present application, the above mentioned devices are collectively referred to as terminals.

Optionally, the access device involved in the embodiment of the present application refers to a device that accesses the core network, and may be, for example, a base station, a broadband network gateway (BNG), an aggregation switch, and a non-third-generation cooperation. The 3rd generation partnership project (3GPP) accesses the network element and the like. The base station may include various forms of base stations, such as macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like.

Optionally, the session management network element or the network device in the embodiment of the present disclosure may be implemented by one device, or may be implemented by multiple devices, or may be a function module in a device. This is not specifically limited. It can be understood that the above functions can be either a network component in a hardware device, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).

For example, the session management network element or network device in FIG. 1 in this embodiment of the present application may be implemented by using the communication device in FIG. 3. FIG. 3 is a schematic diagram showing the hardware structure of a communication device according to an embodiment of the present application. The communication device 300 includes at least one processor 301, a communication line 302, a memory 303, and at least one communication interface 304.

The processor 301 can be a general central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more for controlling the execution of the program of the present application. integrated circuit.

Communication line 302 can include a path for communicating information between the components described above.

The communication interface 304 uses a device such as any transceiver for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .

The memory 303 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions. The dynamic storage device can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this. The memory may be present independently and connected to the processor via communication line 302. The memory can also be integrated with the processor.

The memory 303 is configured to store computer execution instructions for executing the solution of the present application, and is controlled by the processor 301 for execution. The processor 301 is configured to execute computer execution instructions stored in the memory 303, thereby implementing the address management method provided by the following embodiments of the present application.

Optionally, the computer-executed instructions in the embodiment of the present application may also be referred to as an application code, which is not specifically limited in this embodiment of the present application.

In a particular implementation, as an embodiment, processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG.

In a particular implementation, as an embodiment, communication device 300 can include multiple processors, such as processor 301 and processor 308 in FIG. Each of these processors can be a single-CPU processor or a multi-core processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.

In a particular implementation, as an embodiment, the communication device 300 can also include an output device 305 and an input device 306. Output device 305 is in communication with processor 301 and can display information in a variety of ways. For example, the output device 305 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. Wait. Input device 306 is in communication with processor 301 and can receive user input in a variety of ways. For example, input device 306 can be a mouse, keyboard, touch screen device, or sensing device, and the like.

The communication device 300 described above may be a general purpose device or a dedicated device. In a specific implementation, the communication device 300 can be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or the like in FIG. device. The embodiment of the present application does not limit the type of the communication device 300.

The address management method provided by the embodiment of the present application will be specifically described below with reference to FIG. 1 to FIG.

It should be noted that the name of the message or the name of each parameter in the message in the following embodiments of the present application is only an example, and may be other names in the specific implementation. limited.

First, the address management system shown in FIG. 1 is applied to the 5G network shown in FIG. 2 as an example, and the manner in which the SMF network element determines whether the address resource corresponding to the first information in the SMF network element is sufficient is as follows:

Manner 1: The SMF network element determines whether the resources in the address pool corresponding to a certain UPF network element configured on the SMF network element are sufficient. If not, the SMF network element determines the SMF network element and the first information. The corresponding address resource is insufficient; if sufficient, the SMF network element is equivalent to determining that the address resource corresponding to the first information in the SMF network element is sufficient. That is, the first information at this time includes at least one of information of all TAs corresponding to the UPF network element or all DNNs corresponding to the UPF network element.

Illustratively, the address resource 1 in FIG. 4 refers to the resource in the address pool corresponding to the UPF1 network element configured on the SMF network element, and the address resource 2 in FIG. 4 refers to the UPF2 network element configured on the SMF network element. A resource in the address pool. The service network element of UPF1 corresponds to TA1 and TA2, and the UPF2 network element corresponds to TA3 and TA2.

Assuming that the SMF network element determines that the address resource 1 is insufficient, the SMF network element determines that the address resource corresponding to the information of the TA1 and the information of the TA2 is insufficient; or, if the SMF network element determines that the address resource is sufficient, it is equivalent to the SMF. The network element determines that the address resources corresponding to the information of TA1 and the information of TA2 are sufficient. For the manner of determining whether the address resource 1 and the address resource 2 are sufficient, reference may be made to the embodiment shown in FIG. 1 , and details are not described herein again.

Manner 2: The SMF network element first determines whether the resources in the address pool corresponding to a certain UPF network element configured on the SMF network element are sufficient; if sufficient, the situation is similar to that in the mode one, and details are not described herein; Sufficiently, it is checked whether one or more TAs corresponding to the UPF network element are covered by other UPF network elements controlled or managed by the SMF network element, and only resources in the address pool corresponding to all UPF network elements corresponding to one TA appear. When the number is insufficient, the address resource of the TA is considered insufficient. That is to say, the first information at this time includes one or more of the information of the TA corresponding to the UPF network element.

Exemplarily, in combination with FIG. 4 above, it is assumed that the address resource 1 is insufficient, but the address resource 2 is sufficient, the address resource corresponding to TA3 can be regarded as sufficient, and the address resource corresponding to TA2 can also be regarded as sufficient; if the current SMF network element is sufficient If no UPF network element covers TA1 in other UPF network elements that are controlled or managed, the address resource corresponding to TA1 is considered insufficient.

Manner 3: The address resource for a certain UPF network element can be segmented according to the DNN. Therefore, whether the SMF network element determines whether the address resource is sufficient may be sufficient to determine whether the address resource corresponding to a certain DNN corresponding to the UPF network element is sufficient. When all the UPF network elements configured on the SMF network element are insufficient for the address resources of the DNN, the address resources corresponding to the DNN are considered insufficient. That is to say, the first information at this time includes one or more of the DNNs corresponding to the UPF network element.

For example, as shown in FIG. 5, both the UPF1 network element and the UPF2 network element correspond to DNN1 and DNN2, and the address resources corresponding to the UPF1 network element need to be segmented according to the DNN, including: address resources 1-1 and DNN2 corresponding to DNN1. The corresponding address resource 1-2; the address resource corresponding to the UPF2 network element needs to be segmented according to the DNN, including: address resource 2-1 corresponding to DNN1 and address resource 2-2 corresponding to DNN2. In this case, if the UPF1 network element is insufficient for the address resource of the DNN1 (ie, the address resource 1-1), only the other UPF network elements managed by the SMF network element are for the address resource of the DNN1 (such as the address resource 2-1). If the address is insufficient, the address resource corresponding to DNN1 will be considered insufficient. For the manner of determining whether the address resource 1-1 and the address resource 2-1 are sufficient, refer to the embodiment shown in FIG. 1 , and details are not described herein again.

In the embodiment of the present application, the address resources 1-1 corresponding to the DNN1 and the address resources 1-2 corresponding to the DNN2 may overlap or may not overlap; the address resources corresponding to the address resources 2-1 and DNN2 corresponding to the DNN1. 2-2 may overlap or may not overlap, and the embodiment of the present application does not specifically limit this.

In the embodiment of the present application, the address resource corresponding to a DNN corresponding to the UPF network element specifically refers to an address resource that can be allocated for the session when the session establishment request carries a certain DNN corresponding to the UPF network element. That is, if the session establishment request carries a certain DNN corresponding to the UPF network element, the address in the address resource corresponding to the DNN corresponding to the UPF network element needs to be allocated to the session. For example, if the session establishment request carries the DNN1 corresponding to the UPF1 network element, the address in the address resource 1-1 corresponding to the DNN1 corresponding to the UPF1 network element needs to be allocated to the session.

Manner 4: The combination of mode 2 and mode 3, that is, the first information in the mode includes one or more of the DNNs corresponding to the UPF network element, and one or more of the TAs corresponding to the UPF network element. One. In this case, for a certain TA, if the address resource belonging to a certain DNN corresponding to the TA appears insufficient on the SMF network element. The address resource corresponding to the TA and the DNN may be determined as follows:

A. The SMF network element first determines whether other UPF network elements can cover the TA;

B. If A is established, the SMF network element determines whether the address resources of the other UPF network elements that can cover the TA are sufficient for the DNN.

Exemplarily, as shown in FIG. 6, the UPF1 network element corresponds to TA1 and TA2, and the UPF2 network element corresponds to TA3 and TA2; the UPF1 network element and the UPF2 network element both correspond to DNN1 and DNN2, and the address resources corresponding to the UPF1 network element are classified according to the DNN. The segment includes: the address resource 1-1 corresponding to the DNN1 and the address resource 1-2 corresponding to the DNN2; the address resource corresponding to the UPF2 network element is segmented according to the DNN, including: the address corresponding to the address resource 2-1 and the DNN2 corresponding to the DNN1 Resource 2-2. In this case, if the address resource 1-1 belonging to the DNN1 corresponding to the TA2 is insufficient, the SMF network element may determine that the UPF2 network element also covers the TA2. Further, the SMF network element determines that the UPF2 network element addresses the address resource 2-1 of the DNN1. Whether it is sufficient, only the UPF2 network element is insufficient for the address resource 2-1 of DNN1, and the address resources corresponding to DNN1 and TA2 are considered insufficient. For the manner of determining whether the address resource 1-1 and the address resource 2-1 are sufficient, refer to the embodiment shown in FIG. 1 , and details are not described herein again.

It should be noted that, the first mode to the fourth mode are merely exemplary implementations for determining whether the address resources corresponding to the first information in the SMF network element are sufficient by several SMF network elements. Of course, there may be other implementations. The embodiment of the present application does not specifically limit this.

In the following, the address management system shown in FIG. 1 is applied to the 5G network shown in FIG. 2, and the network device is an AMF network element in the 5G network, as shown in FIG. An address management method includes the following steps:

S701. The terminal 1 sends a session establishment request 1 to the SMF1 network element, so that the SMF1 network element receives the session establishment request 1 from the terminal 1.

The session establishment request 1 carries the fourth information, where the fourth information includes at least one of the information of the TA corresponding to the terminal 1 or the DNN corresponding to the terminal 1. The information of the TA is used to represent the location information of the terminal 1, and may include, for example, at least one of a TA identifier, a cell identifier, or location information, which is not specifically limited in this embodiment of the present application.

Optionally, the session in the embodiment of the present application may be, for example, a PDU session, which is not specifically limited in this embodiment of the present application.

S702: The SMF1 network element allocates an IP address to the terminal 1 according to the session establishment request 1.

The related implementation of step S702 can refer to the existing implementation manner, and details are not described herein again.

S703. After the SMF1 network element allocates an IP address to the terminal 1, the SMF1 network element determines that the address resource corresponding to the first information in the SMF1 network element is insufficient, and the first information includes information of one or more TAs, or one or more At least one of the DNNs.

In the embodiment of the present application, after the SMF1 network element allocates an IP address to the terminal 1, the SMF1 network element determines the corresponding UPF network element according to the fourth information, where the information of all the TAs corresponding to the UPF network element, or the At least one of all the DNNs corresponding to the UPF network element includes at least one of the information of the TA corresponding to the terminal 1 or the DNN corresponding to the terminal 1. In addition, the SMF1 network element may determine whether the address resource corresponding to the first information in the SMF1 network element is sufficient according to whether the SMF network element determines whether the address resource corresponding to the first information in the SMF network element is sufficient, and details are not described herein.

Optionally, in the embodiment of the present application, the information of one or more TAs includes information about the TA corresponding to the terminal 1, and the one or more DNNs include the DNN corresponding to the terminal 1. For example, if the session establishment request 1 in step S701 carries the information of the TA corresponding to the terminal 1, the first information includes information of one or more TAs, and the information of the one or more TAs includes the TA corresponding to the terminal 1. Or the information of the DNN corresponding to the terminal 1 in the session establishment request 1 in the step S701, the first information includes information of one or more DNNs, and the information of the one or more DNNs includes the corresponding information of the terminal 1 The information of the DNN; or, if the session establishment request 1 in step S701 carries the information of the TA corresponding to the terminal 1 and the information of the DNN corresponding to the terminal 1, the first information includes information of one or more DNNs, and one or more The information of the TA includes the information of the DNN corresponding to the terminal 1 in the information of the one or more DNNs, and the information of the TA corresponding to the terminal 1 includes the information of the TA corresponding to the terminal 1.

It should be noted that, in the embodiment of the present application, before the session 1 is established, the address resource corresponding to the first information in the SMF1 network element may not be sufficient, but the AMF1 network element serving the terminal 1 does not know. The address resource corresponding to the first information in the SMF1 network element has not been sufficient, so that the AMF1 network element still selects the SMF1 network element for the terminal 1; or the address resource corresponding to the first information in the SMF1 network element is originally sufficient. After the IP address is allocated to the terminal 1, the address resource corresponding to the first information in the SMF1 network element is insufficient. The embodiment of the present application does not specifically limit this.

Optionally, in the embodiment of the present application, if the address resource corresponding to the first information is insufficient, the address resource corresponding to the first information is unavailable, or the SMF1 network element corresponding to the first information is unavailable, and the like. The embodiment does not specifically limit this.

S704. The SMF1 network element sends a notification message 1 to the AMF1 network element serving the terminal 1 to enable the AMF1 network element to receive the notification message 1 from the SMF1 network element. The notification message 1 is used to indicate that the address resource corresponding to the first information in the SMF1 network element is insufficient.

Optionally, in the embodiment of the present application, the notification message 1 may carry the first information and the address insufficient indication; or the notification message 1 carries the first information, the identifier of the SMF1 network element, and the address insufficient indication, etc. This example does not specifically limit this. In the case that the notification message 1 does not carry the identifier of the SMF1 network element, the AMF1 network element can determine the identifier of the SMF1 network element according to the signaling connection between the AMF1 network element and the SMF1 network element, which is not specifically implemented in this embodiment of the present application. limited. In addition, the determining manner of the first information may refer to the foregoing SMF network element to determine whether the address resource corresponding to the first information in the SMF network element is sufficient, and details are not described herein again.

Optionally, in the embodiment of the present application, the notification message 1 may be carried in the session establishment response 1 or may be a special notification message, which is not specifically limited in this embodiment of the present application.

S705. The SMF1 network element stores the identifier of the AMF1 network element served by the terminal 1 in the notified AMF network element list.

The AMF network element list has been notified that the SMF1 network element has notified the identifier of the AMF network element that the address resource corresponding to the first information in the SMF1 network element is insufficient.

In a possible implementation manner, if the address resource corresponding to the first information in the SMF1 network element is insufficient, the address resource corresponding to the first information is originally sufficient, and the terminal 1 is allocated. After the IP address, the address resource corresponding to the first information in the SMF1 network element is insufficient. Then, the SMF1 network element needs to create a notified AMF network element list, and store the identifier of the AMF1 network element served by the terminal 1 to the notified AMF network element list. The result is shown in Table 1:

Table I

信息information	AMF网元的标识AMF network element identification
第一信息First information	AMF1网元的标识AMF1 network element identification

In another possible implementation manner, if the address resource corresponding to the first information in the SMF1 network element is insufficient, the first time occurs, that is, before the terminal 1 establishes the session, the SMF1 network element corresponds to the first information. The address resource has not been sufficient, but the AMF1 network element serving the terminal 1 does not know that the address resource corresponding to the first information in the SMF1 network element has insufficiently appeared, thereby causing the AMF1 network element to still select for the terminal 1. SMF1 network element. At this time, the AMF network element list has been notified, and the notified AMF network element list is created when the address resource corresponding to the first information in the SMF1 network element is insufficient for the first time. For example, after the SMF1 network element allocates an IP address to the terminal 3, the SMF1 network element determines that the address resource corresponding to the first information in the SMF1 network element is insufficient, and the SMF1 network element sends the foregoing notification to the AMF3 network element serving the terminal 3. Message 1, and create a list of AMF network elements that have been notified, and store the identifier of the AMF3 network element in the AMF network element list that has been notified. After the SMF1 network element stores the identifier of the AMF1 network element served by the terminal 1 in the notified AMF network element list, the notified AMF network element list may be as shown in Table 2:

Table II

Optionally, in the embodiment of the present application, the identifier of the AMF1 network element may be, for example, the name of the AMF1 network element, the address of the AMF1 network element, or other information that uniquely identifies the AMF1 network element, and the like.

It should be noted that, in the embodiment of the present application, there is no necessary execution sequence between the step S704 and the step S705, and the step S704 may be performed first, and then the step S705 may be performed; or the step S705 may be performed first, and then the step S704 is performed. It is also possible to perform step S705 and step S704 at the same time, which is not specifically limited in the embodiment of the present application.

S706. The AMF1 network element stores information that the address resource corresponding to the first information in the SMF1 network element is insufficient.

Exemplarily, the information in the SMF1 network element that the address resource corresponding to the first information is insufficient may be stored in Table 3 below:

Table 3

Of course, Table 3 is only an exemplary description. The information in the SMF1 network element that is not sufficient for the address information corresponding to the first information may have other storage forms, which is not specifically limited in this embodiment of the present application.

S707, other processes of session establishment.

For the other processes of the session establishment, reference may be made to the existing implementation manner, and details are not described herein again.

It should be noted that there is no necessary sequence of execution between step S707 and step S703-S706 in the embodiment of the present application, and step S707 may be performed first, and then one or more steps in steps S703-S706 may be performed; The step S707 is performed in the first step S703-S706, and the step S707 is performed. The step S707 and the step S703-S706 are performed at the same time. limited.

Optionally, the address management method provided by the embodiment of the present application may further include the following steps:

S708. The terminal 2 sends a session establishment request 2 to the AMF1 network element serving the terminal 2, so that the AMF1 network element receives the session establishment request 2 from the terminal 2.

The session establishment request 2 carries the second information, where the second information includes at least one of the information of the TA corresponding to the terminal 2 or the DNN corresponding to the terminal 2.

S709. The AMF1 network element selects the SMF2 network element to serve the terminal 2 according to the second information and the stored one or more insufficient address resources. The one or more address resources include address resources corresponding to the information including the second information in the one or more SMF network elements.

For example, if the AMF1 network element determines that the SMF1 network element and the SMF2 network element can serve the terminal 2 according to the prior art, if the first information includes the information of the TA1 and the information of the TA2, the second information includes the information of the TA1, and the AMF1 network element The information about the insufficient address resources corresponding to the first information in the SMF1 network element is stored, and the AMF1 network element does not select the SMF1 network element to serve the terminal 2, but selects the SMF2 network element to serve the terminal 2.

S710, other processes of session establishment.

S711. The terminal 3 sends a session release request to the SMF1 network element, so that the SMF1 network element receives the session release request from the terminal 3. The session release request is used to request to release the session of the terminal 3.

S712. The SMF1 network element releases the IP address allocated to the terminal 3.

It is assumed that the IP address assigned to the terminal 3 is the address in the address resource corresponding to the first information in the SMF1 network element, and after the SMF1 network element releases the IP address allocated to the terminal 3, the SMF1 network element may be the terminal 3. The allocated IP address is stored in the address resource corresponding to the first information in the SMF1 network element; or the SMF1 network element marks the IP address assigned to the terminal 3 as available, etc., which is not specifically limited in this embodiment of the present application.

Optionally, in the embodiment of the present application, the SMF1 network element is released as the IP address allocated by the terminal 3 in the case that the terminal 3 releases the session. For example, the terminal 3 does not release the session, and the SMF1 network element may be released for the terminal 3. The IP address, for example, when the session of the terminal has multiple IP anchors, and one of the IP anchors is released, the IP address is also released, but the session is not released at this time. limited.

S713. Other processes for session release.

For the other processes of the session release, reference may be made to the existing implementation manner, and details are not described herein again.

It should be noted that, in the steps S711-S713, the SMF1 network element is released as the IP address allocated by the terminal 3 as an example. The SMF1 network element may also release the IP address assigned to the terminal 1. limited.

S714: The SMF1 network element determines that the address resource corresponding to the first information in the SMF1 network element is sufficient.

The specific implementation of the step S714 may refer to the foregoing SMF network element to determine whether the address resource corresponding to the first information in the SMF network element is sufficient, and details are not described herein again.

It should be noted that, in the embodiment of the present application, after the SMF1 network element releases one or more IP addresses in the manner of step S712, the SMF1 network element determines that the address resources corresponding to the first information in the SMF1 network element are sufficient. The application examples are not specifically limited thereto.

The S715 and the SMF1 network element acquire the notified AMF network element list.

Assume that the AMF list has been notified as shown in Table 2. The address management method provided by the embodiment of the present application further includes the following steps:

S716: The SMF1 network element sends a notification message 2 to the AMF1 network element according to the notified AMF network element list, so that the AMF1 network element receives the notification message 2 from the SMF1 network element. The notification message 2 is used to indicate that the address resource corresponding to the first information in the SMF1 network element is sufficient.

Optionally, in the embodiment of the present application, the notification message 2 may carry the first information and the address sufficient indication; or the notification message 2 carries the first information, the identifier of the SMF1 network element, and the address sufficient indication, etc. This is not specifically limited. In the case that the notification message 2 does not carry the identifier of the SMF1 network element, the AMF1 network element can determine the identifier of the SMF1 network element according to the signaling connection between the AMF1 network element and the SMF1 network element, which is not specifically implemented in this embodiment of the present application. limited.

Optionally, in the embodiment of the present application, the notification message 2 may be carried in the session release response, or may be a special notification message, which is not specifically limited in this embodiment of the present application.

The S717 and the AMF1 network element delete information that the address resource corresponding to the first information in the SMF1 network element is insufficient.

Assume that the information about the insufficient address resources stored in the AMF1 network element is as shown in Table 3. After the AMF1 network element deletes the information that the address resource corresponding to the first information in the SMF1 network element is insufficient, the result can be as shown in Table 4. Show:

Table 4

S718-S719, similar to steps S716-S717, except that the AMF1 network element in steps S716-S717 is replaced with the AMF3 network element, and the notification message 2 is replaced with the notification message 3. For related description, refer to steps S716-S717. No longer.

It should be noted that there is no necessary sequence of execution between step S713 and steps S714-S719 in the embodiment of the present application, and step S713 may be performed first, and then one or more steps in steps S714-S719 may be performed; The step S713 is performed in the first step S714-S719, and the step S713 is performed. The step S713 and the step S714-S719 are performed at the same time. limited.

In the address management method provided by the embodiment of the present application, the AMF1 network element can learn the state of the address resource corresponding to the first information in the SMF1 network element, and therefore, when the SMF network element is selected in the subsequent terminal session establishment process, according to the address The state of the resource, the SMF network element that circumvents the insufficient address resources, and the SMF network element with sufficient address resources can avoid the problem of duplicate IP addresses assigned to different sessions, and can effectively utilize the IP address in the address pool.

The action of the SMF1 network element or the AMF1 network element in the foregoing steps S701 to S719 can be performed by the processor 301 in the communication device 300 shown in FIG. 3 calling the application code stored in the memory 303, which is used in this embodiment. No restrictions are imposed.

Optionally, the address management system shown in FIG. 1 is applied to the 5G network shown in FIG. 2, and the network device is an AMF network element in the 5G network. The embodiment of the present application further provides an address management method, and The embodiment shown in FIG. 7 is similar, except that in the embodiment shown in FIG. 7, after the SMF1 network element determines that the address resource corresponding to the first information in the SMF1 network element is insufficient, the AMF1 serving the terminal 1 is provided. The network element sends the notification message 1; in this embodiment, after the SMF1 network element determines that the address resource corresponding to the first information in the SMF1 network element is insufficient, the SMF1 network element can notify all AMFs that are reachable or connected to the SMF1 network element. Network element. In this way, the SMF1 network element may not need to establish the notified AMF list. After the address resources corresponding to the first information in the subsequent SMF1 network element are sufficient, the SMF1 network element may also notify all reachable or SMF1 network elements. The AMF network element connected to the SMF1 network element may be an AMF network element that already has a communication relationship, or may be an AMF network element that has an address but has an address, but the SMF1 network element has an address. This example does not specifically limit this.

Of course, in the case that the SMF1 network element notifies all the AMF network elements that are reachable or connected to the SMF1 network element, the SMF1 network element may also choose to establish the notified AMF list, which is not specifically limited in this embodiment of the present application.

Optionally, the address management system shown in FIG. 1 is applied to the 5G network shown in FIG. 2, and the network device is an NRF network element in the 5G network, as shown in FIG. An address management method includes the following steps:

S801. The terminal 1 sends a session establishment request 1 to the AMF1 network element serving the terminal 1 so that the AMF1 network element receives the session establishment request 1 from the terminal 1.

The session establishment request 1 carries the fourth information, where the fourth information includes at least one of the information of the TA corresponding to the terminal 1 or the DNN corresponding to the terminal 1.

The S802 and the AMF1 network element send the available SMF network element list request 1 to the NRF network element, so that the NRF network element receives the available SMF network element list request 1 from the AMF1 network element.

The available SMF network element list request 1 carries the fourth information.

S803. The NRF network element sends an available SMF network element list response 1 to the AMF1 network element, so that the AMF1 network element receives the available SMF network element list response 1 from the NRF network element.

The SMF network element list 1 includes a list of available SMF network elements, and the list of available SMF network elements includes an identifier of the available SMF network element, and the identifier of the available SMF network element may be, for example, an address of the available SMF network element. The embodiment of the present application does not specifically limit this.

In the embodiment of the present application, the NRF network element stores information that the address resource in the SMF network element is insufficient. Further, the NRF network element needs to determine the list of available SMF network elements according to the state information of the stored address resource. The address resource of the SMF network element in the list of available SMF network elements is sufficient, and the address resource is an address resource corresponding to the information including the fourth information. For example, it is assumed that the fourth information includes the TA of the terminal 1 and is recorded as TA1. If the status information of the address resource stored in the NRF network element is as shown in Table 5, the identifier of the SMF network element is not included in the SMF network element list.

Table 5

The address management method provided by the embodiment of the present application may further include the following steps: Assume that the SMF1 network element identifier and the SMF2 network element identifier are included in the SMF network element list.

S804. The AMF1 network element selects the SMF1 network element to serve the terminal 1 according to the available SMF network element list.

For example, the AMF1 network element may select one SMF network element to serve the terminal 1 from multiple SMF network elements according to factors such as load information of one or more SMF network elements stored in the AMF1 network element. Specifically limited.

S805. The AMF1 network element sends a session establishment request 1 to the SMF1 network element, so that the SMF1 network element receives the session establishment request 1 from the AMF1 network element.

For a description of the session establishment request 1, refer to step S801, and details are not described herein again.

S806-S807, the same as the steps S702-S703, the related description can refer to the embodiment shown in FIG. 7, and details are not described herein again.

S808, similar to step S704, except that the AMF1 network element in the embodiment shown in FIG. 7 is replaced with the NRF network element in the embodiment, and the related description may refer to the embodiment shown in FIG. Narration.

S809, similar to step S706, except that the AMF1 network element in the embodiment shown in FIG. 7 is replaced with the NRF network element in the embodiment, and the related description may refer to the embodiment shown in FIG. Narration.

It is assumed that the first information in step S807 includes TA1, TA5, and TA6, and the information about the insufficient address resources in the SMF network element stored by the NRF network element at this time may be as shown in Table 6:

Table 6

S810, other processes of session establishment.

It should be noted that there is no necessary sequence of execution between step S810 and steps S807-S809 in the embodiment of the present application, and step S810 may be performed first, and then one or more steps in steps S807-S809 may be performed; The step S810 is performed in the first step S807-S809, and the step S810 is performed. The step S810 and the step S807-S809 are performed at the same time. limited.

For the related description, reference may be made to the embodiment shown in FIG. 7 , and details are not described herein again.

Optionally, in the embodiment of the present application, the AMF network element served by the terminal 1 and the AMF network element serving the terminal 2 are both AMF1 network elements, and of course, the AMF network element serving the terminal 1 and the terminal 2 are served. The AMF network element may also be a different AMF network element. For example, the AMF network element serving the terminal 1 is an AMF1 network element, and the AMF network element serving the terminal 3 is an AMF3 network element. limited.

S812. The AMF1 network element sends an available SMF network element list request 2 to the NRF network element, so that the NRF network element receives the available SMF network element list request 2 from the AMF1 network element.

The available SMF network element list request 2 carries the second information.

S813. The NRF network element sends an available SMF network element list response 2 to the AMF1 network element, so that the AMF1 network element receives the available SMF network element list response 2 from the NRF network element.

The SMF network element list response 2 includes a list of available SMF network elements.

For the manner in which the NRF network element determines the list of available SMF network elements, refer to the description in step S803 above, and details are not described herein again.

Assume that the second information carries the TA of the terminal 2, which is denoted as TA1; if the status information of the address resource stored in the NRF network element is as shown in Table 6, the SMF network element list does not include the SMF3 network element identifier and the SMF1 network element. Logo.

The address management method provided by the embodiment of the present application may further include the following steps: Assume that the identifier of the SMF2 network element is included in the SMF network element list.

S814. The AMF1 network element selects the SMF2 network element to serve the terminal 2 according to the available SMF network element list.

S815, other processes of session establishment.

S816-S819, the same as the steps S711-S714, the related description can refer to the embodiment shown in FIG. 7, and details are not described herein again.

S820-S821, similar to steps S716-S717, except that the AMF1 network element in the embodiment shown in FIG. 7 is replaced with the NRF network element in the embodiment, and the related description may refer to the embodiment shown in FIG. I will not repeat them here.

Assume that the information about the insufficient address resources stored in the NRF network element is as shown in Table 6. After the NRF network element deletes the information of the SMF1 network element that is insufficient for the address information corresponding to the first information, the result may be as shown in Table 5 above. Shown.

It should be noted that there is no necessary sequence of execution between step S818 and steps S819-S821 in the embodiment of the present application, and step S818 may be performed first, and then one or more steps in steps S819-S821 may be performed; The step S818 is performed in the first step S819-S821, and the step S818 is performed. The step S818 and the step S819-S821 are performed at the same time, and so on. limited.

In the address management method provided by the embodiment of the present application, the NRF network element can learn the state of the address resource corresponding to the first information in the SMF1 network element, and therefore, when the SMF network element is selected in the subsequent terminal session establishment process, the address is determined according to the address. The state of the resource, the SMF network element that circumvents the insufficient address resources, and the SMF network element with sufficient address resources can avoid the problem of duplicate IP addresses assigned to different sessions, and can effectively utilize the IP address in the address pool.

The action of the NRF network element or the AMF1 network element in the foregoing steps S801 to S821 can be performed by the processor 301 in the communication device 300 shown in FIG. 3 calling the application code stored in the memory 303, which is used in this embodiment. No restrictions are imposed.

In summary, the embodiment of the present application discloses an address management method, including: the session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, wherein the first information includes one or more At least one of the information of the tracking area TA or the one or more data network names DNN; the session management network element sends a first notification message to the network device, where the first notification message is used to indicate the first in the session management network element The address resource corresponding to the information is insufficient.

As an implementation, the session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, and the session management network element determines the session management network after the session management network element allocates an IP address to the first terminal. The address resource corresponding to the first information is not sufficient, and the information of the one or more TAs includes the information of the TA corresponding to the first terminal, and the one or more DNNs include the DNN corresponding to the first terminal.

As an implementation, the network device includes a first mobility management network element that serves the first terminal. The address management method disclosed in the embodiment of the present application may further include: the session management network element stores the identifier of the first mobility management network element to the The mobile management network element list is notified, wherein the mobile management network element list has been notified that the session management network element has notified the mobile management network element of the session management network element that the address management resource element corresponding to the first information is insufficient.

Further, as an implementation, before the session management network element stores the identifier of the first mobility management network element in the notified mobile management network element list, the address management method disclosed in the embodiment of the present application may further include: a session management network. The meta creation has notified the mobile management NE list.

Alternatively, as an alternative implementation, before the session management network element stores the identifier of the first mobility management network element in the mobile management network element list, the address management method disclosed in this embodiment may further include After the session management network element allocates the IP address to the second terminal, the session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, and the information of the one or more TAs includes the second terminal corresponding to the information. The information of the TA, the one or more DNNs include the DNN corresponding to the second terminal; the session management network element sends a first notification message to the second mobility management network element serving the second terminal; the session management network element creates the notified mobile Manage the list of NEs.

As an implementation, the address management method disclosed in the embodiment of the present application may further include: the session management network element determines that the address resource corresponding to the first information in the session management network element is sufficient; the session management network element has notified the mobile management network element list. The mobility management network element corresponding to the identifier of the mobility management network element sends a second notification message, where the second notification message is used to indicate that the address resource corresponding to the first information in the session management network element is sufficient.

As an implementation, the network device includes a mobility management network element or a network function storage network element connected by the session management network element. The address management method disclosed in the embodiment of the present application may further include: the session management network element determines the session management network element and the The address resource corresponding to the information is sufficient; the session management network element sends a second notification message to the network device, where the second notification message is used to indicate that the address resource corresponding to the first information in the session management network element is sufficient.

As an implementation, the information of the one or more TAs includes the information of the TA corresponding to the third terminal, and the one or more DNNs include the DNN corresponding to the third terminal; and the session management network element determines the session management network element and the Before the address resource corresponding to the information is sufficient, the address management method disclosed in the embodiment of the present application may further include: the session management network element releases the IP address allocated to the third terminal.

As an implementation, the address resource corresponding to the first information in the session management network element is insufficient, and the ratio of the available address resources in the address resource corresponding to the first information in the session management network element is less than or equal to the first preset value; The address resource corresponding to the first information in the management network element is sufficient, and the ratio of the available address resources in the address resource corresponding to the first information in the session management network element is greater than or equal to a second preset value, where the first preset value is less than Or equal to the second preset value.

Optionally, in the embodiment of the present application, the second notification message carries the first information and the address sufficient indication; or the second notification message carries the identifier of the session management network element, the first information, and the address sufficient indication.

Optionally, in the embodiment of the present application, the first notification message carries the first information and the address insufficient indication; or the first notification message carries the identifier of the session management network element, the first information, and the address insufficient indication.

For the operation of the foregoing address management method, for example, the operation of the session management network element may refer to the operation of the SMF1 network element in FIG. 7 to FIG. 8 and the related text description, and details are not described herein again.

In addition, the embodiment of the present application further discloses an address management method, including: receiving, by a network device, a first notification message from a first session management network element, where the first notification message is used to indicate that the first session management network element is The address resource corresponding to the information is insufficient, wherein the first information includes information of one or more tracking areas TA, or at least one of one or more data network names DNN; the network device stores the first session management network element The information corresponding to the first information that the address resource is insufficient.

As an implementation, the first session management network element includes a session management network element serving the first terminal; correspondingly, the information of the one or more TAs includes information of the TA corresponding to the first terminal, and one or more DNNs. The DNN corresponding to the first terminal is included.

As an implementation, the network device includes a first mobility management network element serving the first terminal. The address management method disclosed in the embodiment of the present application may further include: the first mobility management network element receiving the session establishment request from the second terminal, The session establishment request carries the second information, where the second information includes at least one of the information of the TA corresponding to the second terminal or the DNN corresponding to the second terminal; the first mobility management network element is based on the second information, and the stored one or The plurality of address resources are insufficient, and the second session management network element is selected to serve the second terminal, where the one or more address resources include addresses corresponding to the information including the second information in the one or more session management network elements. Resources.

As another implementation, the network device includes a network function storage network element. The address management method disclosed in the embodiment of the present application may further include: the network function storage network element receiving the request message from the second mobility management network element serving the second terminal. The request message carries the second information, where the second information includes at least one of the information of the TA corresponding to the second terminal or the DNN corresponding to the second terminal, and the network function storage network element is configured according to the second information and one or more Determining an available list of session management network elements, where the address resource includes one or more address resources corresponding to the information including the second information in the one or more session management network elements; the network function storage network The element sends a list of available session management NEs to the second mobility management network element, and the available session management network element list is used to select the second session management network element to serve the second terminal.

Optionally, in the embodiment of the present application, the available session management network element list includes a second session management network element, where the address resource corresponding to the third information in the second session management network element is sufficient, where the third information includes one Or information of a plurality of TAs, or at least one of the one or more DNNs, the second information including the second information.

As an implementation, the address management method disclosed in the embodiment of the present application may further include: the network device receiving a second notification message from the first session management network element, where the second notification message is used to indicate that the first session management network element is The address resource corresponding to the first information is sufficient; the network device deletes information that the address resource corresponding to the first information in the stored first session management network element is insufficient.

For the operation of the network device, for example, the operation of the network device may refer to the operation of the AMF1 network element in FIG. 7 to FIG. 8 and the related text description, or the operation of the network device may refer to the operation of the NRF network element in FIG. 7 to FIG. And the above related text descriptions will not be repeated here.

The solution provided by the embodiment of the present application is mainly introduced from the perspective of interaction between the network elements. It can be understood that, in order to implement the above functions, the foregoing session management network element or network device includes a hardware structure and/or a software module corresponding to each function. Those skilled in the art will readily appreciate that the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

The embodiment of the present application may perform a function module division on a session management network element or a network device according to the foregoing method example. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. in. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.

For example, in the case of dividing each functional module in an integrated manner, FIG. 9 shows a schematic structural diagram of a session management network element 90. The session management network element 90 includes a processing module 902 and a transceiver module 901. The processing module 902 is configured to determine that the address resource corresponding to the first information in the session management network element 90 is insufficient, wherein the first information includes information of one or more TAs, or at least one of the one or more DNNs. The transceiver module 901 is configured to send a first notification message to the network device, where the first notification message is used to indicate that the address resource corresponding to the first information in the session management network element 90 is insufficient.

Optionally, the processing module 902 is specifically configured to: after the IP address is allocated to the first terminal, determine that the address resource corresponding to the first information in the session management network element 90 is insufficient, where the information of one or more TAs is included. The information of the TA corresponding to the first terminal, and the one or more DNNs include the DNN corresponding to the first terminal.

Further, in a possible implementation manner, the network device includes a first mobility management network element serving the first terminal. As shown in FIG. 9, the session management network element 90 further includes a storage module 903. The storage module 903 is configured to store the identifier of the first mobility management network element into the notified mobility management network element list, where the notified mobility management network element list includes the session management network element 90 that has notified the session management network element The identifier of the mobility management network element in which the address resource corresponding to the first information is insufficient in 90.

Optionally, the processing module 902 is further configured to create a list of the mobile management network element that has been notified.

Alternatively, the processing module 902 is further configured to: after the IP address is allocated to the second terminal, determine that the address resource corresponding to the first information in the session management network element 90 is insufficient, where the information of one or more TAs is The information about the TA corresponding to the second terminal, the one or more DNNs include the DNN corresponding to the second terminal, and the transceiver module 901 is further configured to send the first notification message to the second mobility management network element serving the second terminal. The processing module 902 is further configured to create a list of the mobile management network element that has been notified.

Optionally, the processing module 902 is further configured to determine that the address resource corresponding to the first information in the session management network element 90 is sufficient; the transceiver module 901 is further configured to notify the mobility management network element in the mobile management network element list that has been notified. The mobile management network element corresponding to the identifier sends a second notification message, where the second notification message is used to indicate that the address resource corresponding to the first information in the session management network element 90 is sufficient.

In another possible implementation, the network device includes a mobility management network element or a network function storage network element connected to the session management network element 90. The processing module 902 is further configured to determine, in the session management network element 90, the first information. The address resource is sufficient; the transceiver module 901 is further configured to send a second notification message to the network device, where the second notification message is used to indicate that the address resource corresponding to the first information in the session management network element 90 is sufficient.

Optionally, the information of the one or more TAs includes the information of the TA corresponding to the third terminal, and the one or more DNNs include the DNN corresponding to the third terminal. The processing module 902 is further configured to release the third terminal. IP address.

All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

In the present embodiment, the session management network element 90 is presented in a form that divides each functional module in an integrated manner. A "module" herein may refer to a particular ASIC, circuitry, processor and memory that executes one or more software or firmware programs, integrated logic circuitry, and/or other devices that provide the functionality described above. In a simple embodiment, those skilled in the art will appreciate that the session management network element 90 can take the form shown in FIG.

For example, the processor 301 in FIG. 3 can execute the instruction by calling the computer stored in the memory 303, so that the session management network element 90 executes the address management method in the above method embodiment.

Specifically, the function/implementation process of the transceiver module 901, the processing module 902, and the storage module 903 in FIG. 9 can be implemented by the processor 301 in FIG. 3 calling a computer execution instruction stored in the memory 303. Alternatively, the function/implementation process of the processing module 902 in FIG. 9 can be implemented by the processor 301 in FIG. 3 calling the computer execution instruction stored in the memory 303, and the function/implementation process of the transceiver module 901 in FIG. The communication interface 304 in 3 is implemented, and the function/implementation process of the storage module 903 in FIG. 9 can be implemented by the memory 303 in FIG.

The session management network element provided in this embodiment can perform the above-mentioned address management method. Therefore, the technical solution can be obtained by referring to the foregoing method embodiment, and details are not described herein again.

Optionally, the embodiment of the present application further provides a chip system, where the chip system includes a processor, configured to support the session management network element to implement the foregoing address management method, for example, determining an address corresponding to the first information in the session management network element. Not enough resources. In one possible design, the chip system also includes a memory. The memory is used to store program instructions and data necessary for the session management network element. Of course, the memory may not be in the chip system. The chip system may be composed of a chip, and may also include a chip and other discrete devices. This embodiment of the present application does not specifically limit this.

For example, in the case of dividing each functional module in an integrated manner, FIG. 10 shows a schematic structural diagram of a network device 100. The network device 100 includes a transceiver module 1001 and a storage module 1003. The transceiver module 1001 is configured to receive a first notification message from the first session management network element, where the first notification message is used to indicate that the address resource corresponding to the first information in the first session management network element is insufficient, where The first information includes information of one or more TAs, or at least one of the one or more DNNs. The storage module 1003 is configured to store information that the address resources corresponding to the first information in the first session management network element are insufficient. .

Optionally, the first session management network element includes a session management network element that serves the first terminal. Correspondingly, the information of the one or more TAs includes information about the TA corresponding to the first terminal, and the one or more DNNs are included. a DNN corresponding to the first terminal;

Further, in a possible implementation, the network device 100 includes a first mobility management network element serving the first terminal. As shown in FIG. 10, the network device 100 further includes a processing module 1002. The transceiver module 1001 is further configured to Receiving a session establishment request from the second terminal, where the session establishment request carries the second information, the second information includes at least one of the information of the TA corresponding to the second terminal or the DNN corresponding to the second terminal; and the processing module 1002 is configured to: Selecting, according to the second information, the stored information that the one or more address resources are insufficient, the second session management network element to serve the second terminal, where the one or more address resources include one or more session management network elements. An address resource corresponding to the information including the second information.

In another possible implementation manner, the network device 100 includes a network function storage network element. As shown in FIG. 10, the network device 100 further includes a processing module 1002. The transceiver module 1001 is further configured to receive a service from the second terminal. a request message of the mobile management network element, where the request message carries the second information, the second information includes at least one of the information of the TA corresponding to the second terminal or the DNN corresponding to the second terminal, and the processing module 1002 is configured to Determining an available list of session management network elements, wherein the one or more address resources include one or more session management network elements and including the second information, and the stored information of the one or more address resources is insufficient. The address resource corresponding to the information; the transceiver module 1001 is further configured to send the available session management NE list to the second mobility management network element, where the available session management NE list is used to select the second session management network element to serve the second terminal. .

Optionally, the transceiver module 1001 is further configured to receive a second notification message from the first session management network element, where the second notification message is used to indicate that the address resource corresponding to the first information in the first session management network element is sufficient; The processing module 1002 is further configured to delete information in the stored first session management network element that the address resource corresponding to the first information is insufficient.

In the present embodiment, the network device 100 is presented in a form that divides each functional module in an integrated manner. A "module" herein may refer to a particular ASIC, circuitry, processor and memory that executes one or more software or firmware programs, integrated logic circuitry, and/or other devices that provide the functionality described above. In a simple embodiment, those skilled in the art will appreciate that the network device 100 can take the form shown in FIG.

For example, the processor 301 in FIG. 3 can execute the instructions by the computer stored in the memory 303, so that the network device 100 executes the address management method in the above method embodiment.

Specifically, the function/implementation process of the transceiver module 1001, the processing module 1002, and the storage module 1003 in FIG. 10 can be implemented by the processor 301 in FIG. 3 calling a computer execution instruction stored in the memory 303. Alternatively, the function/implementation process of the processing module 1002 in FIG. 10 can be implemented by the processor 301 in FIG. 3 calling the computer execution instruction stored in the memory 303, and the function/implementation process of the transceiver module 1001 in FIG. The communication interface 304 in 3 is implemented, and the function/implementation process of the storage module 1003 in FIG. 10 can be implemented by the memory 303 in FIG.

The network device provided in this embodiment can perform the above-mentioned address management method, and the technical effects that can be obtained by reference to the foregoing method embodiments are not described herein.

Optionally, the embodiment of the present application further provides a chip system, where the chip system includes a processor, configured to support a network device to implement the foregoing address management method, for example, according to the second information, and the stored one or more address resources are not With sufficient information, the second session management network element is selected to serve the second terminal. In one possible design, the chip system also includes a memory. This memory is used to store the necessary program instructions and data for the network device. Of course, the memory may not be in the chip system. The chip system may be composed of a chip, and may also include a chip and other discrete devices. This embodiment of the present application does not specifically limit this.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.

Although the present application has been described herein in connection with the various embodiments, those skilled in the art can Other variations of the disclosed embodiments are achieved. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill several of the functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that the measures are not combined to produce a good effect.

While the present invention has been described in connection with the specific embodiments and embodiments thereof, various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the description and drawings are to be regarded as It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

An address management method, the method comprising:

The session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, wherein the first information includes information of one or more tracking areas TA, or one or more data network names DNN At least one of them;

The session management network element sends a first notification message to the network device, where the first notification message is used to indicate that the address resource corresponding to the first information in the session management network element is insufficient.
The method according to claim 1, wherein the session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, and includes:

After the session management network element allocates an Internet Protocol IP address to the first terminal, the session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, wherein the one is The information of the TA corresponding to the first terminal is included in the information of the multiple TAs, and the DNN corresponding to the first terminal is included in the one or more DNNs.
The method of claim 2, wherein the network device comprises a first mobility management network element serving the first terminal; the method further comprising:

The session management network element stores the identifier of the first mobility management network element in the notified mobile management network element list, where the notified mobile management network element list includes the session management network element has been notified An identifier of the mobility management network element that is insufficient in address resources corresponding to the first information in the session management network element.
The method according to claim 3, wherein before the session management network element stores the identifier of the first mobility management network element in the mobile management network element list, the method further includes:

The session management network element creates the notified mobile management network element list.
The method according to claim 3, wherein before the session management network element stores the identifier of the first mobility management network element in the mobile management network element list, the method further includes:

After the session management network element allocates an IP address to the second terminal, the session management network element determines that the address resource corresponding to the first information in the session management network element is insufficient, wherein the one or more The information of the TA includes the information of the TA corresponding to the second terminal, and the one or more DNNs include the DNN corresponding to the second terminal;

Transmitting, by the session management network element, the first notification message to a second mobility management network element serving the second terminal;

The session management network element creates the notified mobile management network element list.
The method according to any one of claims 3-5, wherein the method further comprises:

The session management network element determines that an address resource corresponding to the first information in the session management network element is sufficient;

Transmitting, by the session management network element, a second notification message to the mobility management network element corresponding to the identifier of the mobility management network element in the mobile management network element list, where the second notification message is used to indicate the session management network The address resource corresponding to the first information in the meta is sufficient.
The method according to claim 1, wherein the network device comprises a mobility management network element or a network function storage network element to which the session management network element is connected; the method further comprises:

The session management network element determines that an address resource corresponding to the first information in the session management network element is sufficient;

The session management network element sends a second notification message to the network device, where the second notification message is used to indicate that the address resource corresponding to the first information in the session management network element is sufficient.
The method according to claim 6 or 7, wherein the information of the one or more TAs includes information of a TA corresponding to the third terminal, and the one or more DNNs include the third terminal corresponding to the information. The method further includes: before the session management network element determines that the address resource corresponding to the first information in the session management network element is sufficient, the method further includes:

The session management network element releases an IP address assigned to the third terminal.
The method according to any one of claims 6-8, wherein the address resource corresponding to the first information in the session management network element is insufficient, including the first and the first in the session management network element. The proportion of the available address resources in the address resource corresponding to the information is less than or equal to the first preset value; the address resource corresponding to the first information in the session management network element is sufficient to include the session management network element and the first The ratio of the available address resources in the address resource corresponding to the information is greater than or equal to the second preset value, where the first preset value is less than or equal to the second preset value.
The method according to any one of claims 6-9, wherein the second notification message carries the first information and an address sufficient indication; or the second notification message carries the session management network element The identification, the first information, and the address sufficient indication.
The method according to any one of claims 1 to 10, wherein the first notification message carries the first information and an insufficient address indication; or the first notification message carries the session management network The identity of the element, the first information, and the address are insufficient indication.
An address management method, the method comprising:

The network device receives the first notification message from the first session management network element, where the first notification message is used to indicate that the address resource corresponding to the first information in the first session management network element is insufficient, wherein the first The information includes information of one or more tracking areas TA, or at least one of one or more data network names DNN;

The network device stores information that the address resources corresponding to the first information in the first session management network element are insufficient.
The method according to claim 12, wherein the first session management network element comprises a session management network element serving the first terminal; and correspondingly, the information of the one or more TAs includes the Information about a TA corresponding to a terminal, where the one or more DNNs include a DNN corresponding to the first terminal.
The method of claim 13, wherein the network device comprises a first mobility management network element serving the first terminal; the method further comprising:

The first mobility management network element receives a session establishment request from the second terminal, where the session establishment request carries the second information, where the second information includes the information of the TA corresponding to the second terminal or the second terminal. At least one of the corresponding DNNs;

The first mobility management network element selects a second session management network element to serve the second terminal according to the second information and the stored information of one or more insufficient address resources, where the one or The plurality of address resources include address resources in the one or more session management network elements corresponding to the information including the second information.
The method according to claim 12 or 13, wherein the network device comprises a network function storage network element; the method further comprises:

The network function storage network element receives a request message from a second mobility management network element serving the second terminal, where the request message carries the second information, where the second information includes the information of the TA corresponding to the second terminal. Or at least one of the DNNs corresponding to the second terminal;

The network function storage network element determines, according to the second information, and the stored information that the one or more address resources are insufficient, the available session management network element list, where the one or more address resources include one or An address resource corresponding to the information including the second information in the plurality of session management network elements;

The network function storage network element sends the available session management network element list to the second mobility management network element, where the available session management network element list is used to select the second session management network element as the second terminal service.
The method according to claim 15, wherein the available session management network element list includes the second session management network element, and the address resource corresponding to the third information in the second session management network element Sufficiently, wherein the third information includes information of one or more TAs, or at least one of one or more DNNs, the second information including the second information.
The method according to any one of claims 12 to 16, wherein the method further comprises:

Receiving, by the network device, a second notification message from the first session management network element, where the second notification message is used to indicate that an address resource corresponding to the first information in the first session management network element is sufficient;

The network device deletes information that the stored address resource corresponding to the first information in the first session management network element is insufficient.
A session management network element, where the session management network element includes: a processing module and a transceiver module;

The processing module is configured to determine that the address resource corresponding to the first information in the session management network element is insufficient, wherein the first information includes information of one or more tracking areas TA, or one or more data. At least one of the network names DNN;

The transceiver module is configured to send a first notification message to the network device, where the first notification message is used to indicate that the address resource corresponding to the first information in the session management network element is insufficient.
The session management network element according to claim 18, wherein the processing module is specifically configured to:

After the Internet protocol IP address is allocated to the first terminal, the address resource corresponding to the first information in the session management network element is determined to be insufficient, and the information of the one or more TAs includes the first Information about the TA corresponding to the terminal, where the one or more DNNs include a DNN corresponding to the first terminal.
The session management network element according to claim 19, wherein the network device comprises a first mobility management network element serving the first terminal; the session management network element further comprises a storage module;

The storage module is configured to store the identifier of the first mobility management network element into the notified mobile management network element list, where the notified mobility management network element list includes the session management network element that has been notified An identifier of the mobility management network element in which the address resource corresponding to the first information in the session management network element is insufficient.
A session management network element according to claim 20, wherein

The processing module is further configured to create the notified mobile management network element list.
A session management network element according to claim 20, wherein

The processing module is further configured to: after the IP address is allocated to the second terminal, determine that the address resource corresponding to the first information in the session management network element is insufficient, where the information of the one or more TAs is The information about the TA corresponding to the second terminal, where the one or more DNNs include a DNN corresponding to the second terminal;

The transceiver module is further configured to send the first notification message to a second mobility management network element serving the second terminal;

The processing module is further configured to create the notified mobile management network element list.
A session management network element according to any one of claims 20-22, characterized in that

The processing module is further configured to determine that an address resource corresponding to the first information in the session management network element is sufficient;

The transceiver module is further configured to send a second notification message to the mobility management network element corresponding to the identifier of the mobility management network element in the notified mobility management network element list, where the second notification message is used to indicate the session The address resources corresponding to the first information in the management network element are sufficient.
The session management network element according to claim 18, wherein the network device comprises a mobility management network element or a network function storage network element to which the session management network element is connected;

The processing module is further configured to determine that an address resource corresponding to the first information in the session management network element is sufficient;

The transceiver module is further configured to send a second notification message to the network device, where the second notification message is used to indicate that an address resource corresponding to the first information in the session management network element is sufficient.
The session management network element according to claim 23 or 24, wherein the information of the one or more TAs includes information of a TA corresponding to the third terminal, and the one or more DNNs include the The DNN corresponding to the three terminals;

The processing module is further configured to release an IP address assigned to the third terminal.
A network device, comprising: a transceiver module and a storage module;

The transceiver module is configured to receive a first notification message from the first session management network element, where the first notification message is used to indicate that the address resource corresponding to the first information in the first session management network element is insufficient. The first information includes information of one or more tracking areas TA, or at least one of one or more data network names DNN;

The storage module is configured to store information that the address resources corresponding to the first information in the first session management network element are insufficient.
The network device according to claim 26, wherein the first session management network element comprises a session management network element serving the first terminal; and correspondingly, the information of the one or more TAs includes the Information about the TA corresponding to the first terminal, where the one or more DNNs include a DNN corresponding to the first terminal.
The network device according to claim 27, wherein the network device comprises a first mobility management network element serving the first terminal; the network device further comprises a processing module;

The transceiver module is further configured to receive a session establishment request from the second terminal, where the session establishment request carries the second information, where the second information includes the information of the TA corresponding to the second terminal or the second terminal. At least one of the corresponding DNNs;

The processing module is configured to select, according to the second information, and the stored information that the one or more address resources are insufficient, the second session management network element to serve the second terminal, where the one or more The address resources include address resources in the one or more session management network elements corresponding to the information including the second information.
The network device according to claim 26 or 27, wherein the network device comprises a network function storage network element; the network device further comprises a processing module;

The transceiver module is further configured to receive a request message from a second mobility management network element serving the second terminal, where the request message carries the second information, where the second information includes the TA corresponding to the second terminal. Information or at least one of the DNNs corresponding to the second terminal;

The processing module is configured to determine, according to the second information, and the stored information that the one or more address resources are insufficient, the available session management network element list, where the one or more address resources include one or An address resource corresponding to the information including the second information in the plurality of session management network elements;

The transceiver module is further configured to send the available session management network element list to the second mobility management network element, where the available session management network element list is used to select the second session management network element as the Two terminal services.
The network device according to any one of claims 26-29, wherein the network device further comprises a processing module;

The transceiver module is further configured to receive a second notification message from the first session management network element, where the second notification message is used to indicate that the first session management network element corresponds to the first information. Adequate address resources;

The processing module is further configured to delete information that is insufficient in address resources corresponding to the first information in the stored first session management network element.
An address management system, wherein the address management system includes a session management network element and a network device;

The session management network element is configured to determine that the address resource corresponding to the first information in the session management network element is insufficient, and send a first notification message to the network device, where the first notification message is used to indicate The address resource corresponding to the first information in the session management network element is insufficient, and the first information includes information of one or more tracking areas TA or at least one of one or more data network names DNN;

The network device is configured to receive the first notification message from the session management network element.
A session management network element, comprising: a processor and a memory; the memory is configured to store a computer execution instruction, and when the session management network element is running, the processor executes the memory storage The computer executes instructions to cause the session management network element to perform the address management method of any of claims 1-11.
A network device, comprising: a processor and a memory; the memory is configured to store a computer execution instruction, and when the network device is running, the processor executes the computer execution instruction stored by the memory, The network device is caused to perform the address management method according to any one of claims 12-17.
A processor, for performing the address management method according to any one of claims 1 to 11, or any one of claims 12 to 17.
A computer readable storage medium, wherein the computer readable storage medium stores instructions that, when run on a computer, cause the computer to perform any of claims 1-11, or claim 12. The address management method of any of the items -17.
A computer program product, wherein the computer program product stores instructions that, when run on a computer, cause the computer to perform any of claims 1-11, or any of claims 12-17 The address management method described in the item.
An apparatus for performing the address management method according to any one of claims 1-11.
An apparatus for performing the address management method according to any one of claims 12-17.