WO2022017380A1

WO2022017380A1 - User ip address allocation management method and apparatus, and session management function entity

Info

Publication number: WO2022017380A1
Application number: PCT/CN2021/107356
Authority: WO
Inventors: 王荣; 周越; 宋月
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2020-07-21
Filing date: 2021-07-20
Publication date: 2022-01-27
Also published as: CN114039945A; CN114039945B

Abstract

Provided are a user IP address allocation management method and apparatus, and a session management function (SMF) entity. The user IP address allocation management method is applied to an SMF entity in an SMF set, and comprises: acquiring allocation information of a target IP address, wherein the allocation information comprises first correspondence information between the target IP address and an SMF entity, and occupation situation information of the target IP address; and performing user IP address allocation according to the allocation information, wherein the target IP address refers to at least one user IP address that can be allocated by the SMF entity, and different SMF entities in an SMF set correspond to different target IP addresses.

Description

User IP address allocation management method, device and session management functional entity

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202010704449.1 filed in China on Jul. 21, 2020, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of communication technologies, and in particular, to a user IP address allocation management method, device, and session management functional entity.

Background technique

At present, 5GC (fifth generation mobile communication technology core network, namely 5G core network) supports SMF (session management function) from the selected PSA (protocol data unit session anchor point) UPF (user plane function) corresponding to the UE (terminal) The IP address pool allocates an IP address to the UE (that is, the SMF allocates the UE IP address), and also supports the SMF to request the UPF to allocate an IP address to the UE and obtain the UE IP address allocated by the UPF through the N4 interface (the interface between the SMF and the UPF) process ( i.e. UPF assigns UE IP address). The assignment of UE IP addresses by SMF is a required function, and the assignment of UE IP addresses by UPF is optional.

In order to realize the redundancy and scalability of SMF, 5GC supports the formation of multiple SMFs into an SMF set (set). Specifically, there are two schemes for SMFs to form an SMF set. PFCP (Packet Forwarding Control Protocol) coupling is used for continuous session control; as shown in Figure 1, only one coupling is established between the SMF set and the UPF) and MPAS (meaning that different SMFs in the SMF set are coupled through multiple PFCPs (one SMF and one pair) Association) for session continuous control; as shown in Figure 2, each SMF in the SMF set establishes a connection with the UPF). However, if the method of assigning UE IP addresses by SMF is adopted, since multiple SMFs control the UE IP address pool of the same UPF at the same time, there may be a situation that the same UE IP address is assigned by multiple SMFs.

In this regard, the related art suggests that if the SMF set is used to connect the UPF (SSET scheme or MPAS scheme), the UE IP address is allocated by the UPF to avoid the address allocation conflict that may be caused by the SMF allocation of the UE IP address. However, there are the following problems:

Although the UE IP address allocation can be achieved through the above related technical solutions, considering that in the process of network evolution, some operators may have selected SMF to allocate UE IP addresses in the early stage of network construction. When implementing the redundancy and scalability of SMF, only the solution for assigning UE IP addresses by UPF is provided, while the solution for assigning UE IP addresses by SMF is lacking; this may lead to the failure of the UE IP address assignment solution, resulting in the failure of sessions. accomplish.

SUMMARY OF THE INVENTION

The purpose of this application is to provide a user IP address allocation management method, device and session management functional entity, so as to solve the problem that the session may not be realized in the related art.

In order to solve the above-mentioned technical problem, the embodiment of the present application provides a method for managing the IP address allocation of the IP address of the user internetworking protocol, which is applied to the SMF entity in the session management function SMF concentration, including:

Obtain allocation information of the target IP address, where the allocation information includes the first correspondence information between the target IP address and the SMF entity and the occupancy information of the target IP address;

According to the allocation information, perform user IP address allocation;

Wherein, the target IP address refers to at least one user IP address that can be allocated by the SMF entity;

Different SMF entities in the SMF set correspond to different target IP addresses.

Optionally, performing user IP address allocation according to the allocation information, including:

According to the allocation information, determine the occupancy information of the target IP address;

According to the occupancy information, an unoccupied user IP address is selected from the target IP addresses for allocation.

Optionally, also include:

Obtain the record information of user IP addresses that can be allocated by other SMF entities in the SMF set;

The record information includes second correspondence information between the other SMF entities and user IP addresses that can be allocated by the other SMF entities, and the user IP addresses that can be allocated by the other SMF entities in the SMF Occupancy information on the entity.

Optionally, also include:

The allocation information and logging information are maintained dynamically.

Optionally, the dynamic maintenance of the allocation information includes:

After the user IP address is allocated according to the allocation information, the occupancy information of the allocated user IP address is updated.

Optionally, the dynamic maintenance of the allocation information and record information includes:

In the case that the control plane of the session is switched from the SMF entity to the other SMF entity, and the user IP address occupied by the session belongs to the target IP address of the SMF entity, the SMF entity's The occupancy information of the user IP address occupied by the session in the allocation information is occupied; or,

In the case that the control plane of the session is switched from the SMF entity to the other SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the SMF entity's all The occupancy status information of the user IP address occupied by the session in the record information is updated from occupied to unoccupied.

In the case that the control plane of the existing session is switched from the other SMF entity to the SMF entity, and the user IP address occupied by the session belongs to the target IP address of the SMF entity, the SMF entity's said SMF entity is maintained. The occupancy information of the user IP address occupied by the session in the allocation information is occupied; or,

In the case that the control plane of the session is switched from the other SMF entity to the SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the SMF entity's all The occupancy status information of the user IP address occupied by the session in the record information is updated from unoccupied to occupied.

When there is a session release user IP address, and the released user IP address belongs to the target IP address of the SMF entity, the occupancy information of the released user IP address in the allocation information of the SMF entity is set by Occupied updated to unoccupied; or,

When there is a session release user IP address, and the released user IP address does not belong to the target IP address of the SMF entity, the occupancy information of the released user IP address in the record information of the SMF entity Update from occupied to unoccupied; and broadcast the message of the released user IP address.

receiving the message of releasing the user's IP address broadcasted by the other SMF entities;

According to the message, the occupancy status information of the released user IP address is updated from occupied to unoccupied.

In the case that the allocation information and the recording information are lost, broadcast a message of restarting the SMF entity to the other SMF entities;

receiving a response message fed back by all other SMF entities in the SMF set according to the restart message of the SMF entity;

Re-determine the allocation information and the record information according to the set of response messages;

Wherein, the response message includes at least the first correspondence of the SMF entity and the occupancy information of the target IP address;

The set of response messages includes response messages fed back by all other SMF entities in the SMF set.

Optionally, the re-determining the allocation information according to the set of response messages includes:

According to the set of response messages, re-determine the occupancy information corresponding to the target IP address;

The re-determined allocation information is obtained according to the first corresponding relationship and the re-determined occupancy information.

Optionally, re-determining the occupancy information corresponding to the target IP address according to the set of response messages, includes:

Re-determining the target IP address according to the first correspondence in the response message set;

The occupancy information corresponding to the target IP address is re-determined according to the re-determined target IP address and the occupancy information of the target IP address in the response message set.

Optionally, re-determining the occupancy information corresponding to the target IP address according to the re-determined target IP address and the occupancy information of the target IP address in the response message set, including:

In the case where there is first occupancy information in the occupancy information of the first user IP address in the response message set, determine that the occupancy information of the first user IP address is occupied;

Otherwise, determine that the occupancy information of the first user IP address is not occupied;

Wherein, the first occupancy information is occupancy information indicating that the first user IP address is occupied;

The first user IP address is any user IP address in the target IP addresses.

Optionally, the response message set further includes the second correspondence information respectively corresponding to all the other SMF entities in the SMF set;

Wherein, redetermining the record information according to the set of response messages includes:

According to all the second correspondence information in the response message set, determine the user IP addresses that can be allocated by the other SMF entities corresponding to each of the second correspondences, and determine the user IP addresses that can be allocated by the other SMF entities. The occupancy information of the assigned user IP address on the SMF entity is not occupied;

The re-determined record information is obtained according to all the second correspondence information in the response message set and each determined occupancy situation information.

Optionally, dynamically maintaining the record information includes:

receiving the SMF restart message broadcast by the other SMF entities;

Feeding back a response message to the other SMF entities according to the SMF restart message;

Wherein, the response message includes at least information on the occupation of user IP addresses that can be allocated by the other SMF entities.

The embodiment of the present application also provides an IP address allocation management device for the user internetworking protocol, which is applied to the SMF entity in the session management function SMF concentration, including:

a first obtaining module, configured to obtain allocation information of the target IP address, where the allocation information includes the first correspondence information between the target IP address and the SMF entity and the occupancy information of the target IP address;

a first allocation module, configured to allocate user IP addresses according to the allocation information;

Optionally, the first distribution module includes:

a first determining submodule, configured to determine the occupancy information of the target IP address according to the allocation information;

The first allocation sub-module is configured to select an unoccupied user IP address from the target IP addresses for allocation according to the occupancy information.

Optionally, also include:

The second obtaining module is used to obtain the record information of user IP addresses that can be allocated by other SMF entities in the SMF set;

Optionally, also include:

The first maintenance module is used to dynamically maintain the allocation information and record information.

Optionally, the first maintenance module includes:

The first update sub-module is configured to update the occupancy information of the allocated user IP address after the user IP address is allocated according to the allocation information.

Optionally, the first maintenance module includes:

The first processing submodule is configured to, when the control plane of the session is switched from the SMF entity to the other SMF entity, and the user IP address occupied by the session belongs to the target IP address of the SMF entity, Maintain the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity as occupied; or,

Optionally, the first maintenance module includes:

The second processing submodule is configured to, when the control plane of the session is switched from the other SMF entity to the SMF entity, and the user IP address occupied by the session belongs to the target IP address of the SMF entity, Maintain the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity as occupied; or,

In the case where the control plane of the session is switched from the other SMF entity to the SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, all the SMF entity's The occupancy status information of the user IP address occupied by the session in the record information is updated from unoccupied to occupied.

Optionally, the first maintenance module includes:

The third processing submodule is configured to, when there is a session release user IP address, and the released user IP address belongs to the target IP address of the SMF entity, release the released user IP address in the allocation information of the SMF entity. The occupancy information of the user's IP address is updated from occupied to unoccupied; or,

Optionally, the first maintenance module includes:

The first receiving submodule, for receiving the message of releasing the user IP address broadcasted by the other SMF entities;

The second update sub-module is configured to update the occupancy information of the released user IP address from occupied to unoccupied according to the message.

Optionally, the first maintenance module includes:

a first broadcasting sub-module, configured to broadcast a message of restarting the SMF entity to the other SMF entities when the allocation information and the recording information are lost;

a second determination submodule, configured to re-determine the allocation information and the record information according to the response message set;

Optionally, the second determination submodule includes:

A first determining unit, for re-determining the occupancy information corresponding to the target IP address according to the set of response messages;

A first processing unit, configured to obtain the re-determined allocation information according to the first corresponding relationship and the re-determined occupancy information.

Optionally, the first determining unit includes:

a first determination subunit, configured to re-determine the target IP address according to the first correspondence in the response message set;

The second determining subunit is configured to re-determine the occupancy information corresponding to the target IP address according to the re-determined target IP address and the occupancy information of the target IP address in the response message set.

Optionally, the second determination subunit is specifically used for:

The first user IP address is any user IP address in the target IP addresses.

Wherein, the second determination submodule includes:

A second determining unit, configured to determine, according to all the second correspondence information in the response message set, the user IP addresses that can be allocated by the other SMF entities corresponding to each of the second correspondences, and determine The occupancy information on the SMF entity of the user IP addresses that can be allocated by the other SMF entities is not occupied;

A third determining unit, configured to obtain the re-determined record information according to all the second correspondence information in the response message set and each determined occupancy situation information.

Optionally, the first maintenance module includes:

a second receiving submodule, configured to receive the SMF restart message broadcast by the other SMF entities;

a first feedback submodule, configured to feed back a response message to the other SMF entities according to the SMF restart message;

The embodiment of the present application also provides a session management function SMF entity, where the SMF entity is an SMF entity in the SMF concentration, including: a processor and a transceiver;

The processor is configured to obtain allocation information of the target IP address, where the allocation information includes the first correspondence information between the target IP address and the SMF entity and the occupancy information of the target IP address;

According to the allocation information, perform user IP address allocation;

Optionally, the processor is used for, including:

Optionally, the processor is also used for:

The allocation information and logging information are maintained dynamically.

Optionally, the processor is specifically used for:

When there is a session release user IP address, and the released user IP address does not belong to the target IP address of the SMF entity, the occupancy information of the released user IP address in the record information of the SMF entity It is updated from being occupied to not being occupied; and the message of the released user IP address is broadcasted through the transceiver.

Optionally, the processor is specifically used for:

Receive, through the transceiver, a message for releasing the user's IP address broadcast by the other SMF entities;

Optionally, the processor is specifically used for:

In the case that the allocation information and the record information are lost, broadcast the message of restarting the SMF entity to the other SMF entities through the transceiver;

receiving, by the transceiver, a response message fed back by all other SMF entities in the SMF set according to the restart message of the SMF entity;

Optionally, the processor is specifically used for:

The first user IP address is any user IP address in the target IP addresses.

Wherein, the processor is specifically used for:

Optionally, the processor is specifically used for:

receiving, by the transceiver, an SMF restart message broadcast by the other SMF entity;

Feeding back a response message to the other SMF entities through the transceiver according to the SMF restart message;

Embodiments of the present application also provide a session management function SMF entity, including a memory, a processor, and a computer program stored in the memory and running on the processor; the processor implements the program when the processor executes the program. The above-mentioned method for managing the IP address allocation of the User Internet Protocol.

Embodiments of the present application further provide a readable storage medium, on which a program is stored, and when the program is executed by a processor, implements the steps in the above-mentioned method for managing the IP address allocation of the User Internet Protocol.

The beneficial effects of the above-mentioned technical solutions of the present application are as follows:

In the above solution, the IP address allocation management method of the User Internet Protocol obtains the allocation information of the target IP address, and the allocation information includes the first correspondence information between the target IP address and the SMF entity and all the corresponding information. The occupancy information of the target IP address; according to the allocation information, user IP address allocation is performed; wherein, the target IP address refers to at least one user IP address that can be allocated by the SMF entity; different in the SMF set SMF entities correspond to different target IP addresses; it can realize the use of SMF in the SMF set to allocate UE IP (that is, the above-mentioned user IP) addresses, and avoid address allocation conflicts, ensure the normal implementation of UE IP address allocation, and then ensure the normal implementation of the session. Implementation, which solves the problem that the session may not be realized in the related technology.

Description of drawings

1 is a schematic diagram of an SSET scheme in the related art;

Fig. 2 is the MPAS scheme schematic diagram in the related art;

3 is a schematic flowchart of a method for managing user IP address allocation according to an embodiment of the present application;

FIG. 4 is a schematic diagram of UE IP address pool division according to an embodiment of the application;

5 is a schematic diagram of a UE IP address pool table according to an embodiment of the present application;

6 is a schematic diagram of UE IP address allocation according to an embodiment of the present application;

7 is a schematic diagram of dynamic marking of UE IP addresses according to an embodiment of the present application;

8 is a schematic diagram of a UE IP address dynamic marking and an on-demand broadcast release message according to an embodiment of the application;

FIG. 9 is a schematic diagram of SMF restarting according to an embodiment of the present application;

10 is a schematic structural diagram of a user IP address allocation management device according to an embodiment of the application;

FIG. 11 is a schematic structural diagram of a session management function SMF entity according to an embodiment of the present application.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present application more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

Aiming at the problem that the session may not be realized in the prior art, the present application provides a user Internet Internet Protocol IP address allocation management method, which is applied to the SMF entity in the session management function SMF concentration, as shown in Figure 3, including:

Step 31: Obtain allocation information of the target IP address, where the allocation information includes the first correspondence information between the target IP address and the SMF entity and the occupancy information of the target IP address;

Step 32: according to the allocation information, perform user IP address allocation;

The IP address allocation management method provided by the embodiment of the present application obtains the allocation information of the target IP address, where the allocation information includes the first correspondence information between the target IP address and the SMF entity and the occupancy information of the target IP address; according to the allocation information, perform user IP address allocation; wherein, the target IP address refers to at least one user IP address that can be allocated by the SMF entity; the SMF centralized Different SMF entities corresponding to different target IP addresses; it can realize the use of SMF in the SMF set to allocate UE IP addresses, and avoid address allocation conflicts, ensure the normal realization of UE IP address allocation, and then ensure the normal realization of sessions, very good It solves the problem that the session may not be realized in the related art.

Specifically, the performing user IP address allocation according to the allocation information includes: determining occupancy information of the target IP address according to the allocation information; and obtaining information from the target IP address according to the occupancy information Select an unoccupied user IP address to assign.

Further, the method for managing IP address allocation of the User Internet Protocol further includes: acquiring record information of user IP addresses that can be allocated by other SMF entities in the SMF set; wherein the record information includes the other SMFs The second correspondence relationship information between the entity and the user IP addresses that can be allocated by the other SMF entities, and the occupancy information on the SMF entity of the user IP addresses that can be allocated by the other SMF entities.

Wherein, other SMF entities refer to SMF entities other than the SMF entity. The number of other SMF entities is at least one.

Further, the method for managing the IP address allocation of the IP address further includes: dynamically maintaining the allocation information and recording information.

Specifically, the dynamically maintaining the allocation information includes: after allocating the user IP addresses according to the allocation information, updating the information on the occupation of the allocated user IP addresses.

Specifically, the occupancy information is updated from unoccupied (available) to occupied (unavailable).

In addition, considering that the UE IP address allocation scheme only by allocating different UE IP addresses to the SMFs in the SMF set cannot completely avoid the risk of address allocation conflicts, because the SSET or MPAS scheme requires that any session can be managed by the SMF. Any SMF control in the set, for example: when SMF A assigns a UE IP address to a session, the session may be switched to SMF B in the set, when the session is migrated from SMF A to SMF B, if no special processing, SMF A will consider that the initially allocated UE IP address can be allocated again, and the UE IP address may be repeatedly allocated in the next session request. To prevent the risk of such address allocation conflicts, the following two example measures are provided in the embodiments of the present application:

The first exemplary measure, the dynamic maintenance of the allocation information and the record information includes: switching from the SMF entity to the other SMF entity on a control plane where a session exists, and the user IP address occupied by the session belongs to In the case of the target IP address of the SMF entity, the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity is maintained as occupied; When the SMF entity is switched to the other SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the record information of the SMF entity is stored in the session. The occupancy status information of the occupied user IP address is updated from occupied to unoccupied.

The second exemplary measure, the dynamic maintenance of the allocation information and the record information includes: switching from the other SMF entity to the SMF entity on the control plane where the session exists, and the user IP address occupied by the session belongs to the In the case of the target IP address of the SMF entity, the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity is maintained as occupied; If the other SMF entity is switched to the SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the record information of the SMF entity is stored in the session. The occupancy status information of the occupied user IP address is updated from unoccupied to occupied.

For the situation of IP address release, the following two example measures are provided in the embodiment of this application:

The first example measure, the dynamic maintenance of the allocation information and the record information includes: in the case that a session releases the user IP address and the released user IP address belongs to the target IP address of the SMF entity, The occupancy information of the released user IP address in the allocation information of the SMF entity is updated from occupied to unoccupied; or, the user IP address is released when there is a session, and the released user IP address does not belong to the SMF entity In the case of the target IP address of the SMF entity, the occupancy information of the released user IP address in the record information of the SMF entity is updated from being occupied to not being occupied; And broadcast the message of the released user IP address .

The second exemplary measure, the dynamic maintenance of the allocation information and the record information includes: receiving a message of releasing the user IP address broadcast by the other SMF entities; according to the message, the occupancy situation of the user IP address to be released The information is updated from occupied to unoccupied.

In the case of SMF restart, the following two example measures are provided in the embodiments of the present application:

In a first example measure, the dynamic maintenance of the allocation information and the record information includes: in the case that the allocation information and the record information are lost, broadcasting a message of restarting the SMF entity to the other SMF entities; The response message fed back by all other SMF entities in the SMF set according to the restart message of the SMF entity; according to the response message set, the allocation information and the record information are re-determined; wherein, the response message at least includes all the SMF entity's information. The first correspondence relationship and the occupancy information of the target IP address; the response message set includes the response messages fed back by all other SMF entities in the SMF set.

The re-determining the allocation information according to the set of response messages includes: re-determining the occupancy information corresponding to the target IP address according to the set of response messages; according to the first correspondence and the re-determined occupancy situation information, the re-determined allocation information is obtained.

Specifically, the re-determining the occupancy information corresponding to the target IP address according to the response message set includes: re-determining the target IP address according to the first correspondence in the response message set; The occupancy information corresponding to the target IP address is re-determined according to the re-determined target IP address and the occupancy information of the target IP address in the response message set.

More specifically, re-determining the occupancy information corresponding to the target IP address according to the re-determined target IP address and the occupancy information of the target IP address in the response message set includes: In the case where there is first occupancy information in the occupancy information of the first user IP address in the response message set, determine that the occupancy information of the first user IP address is occupied; otherwise, determine that the first user The occupancy information of the IP address is not occupied; wherein, the first occupancy information is occupancy information indicating that the first user IP address is occupied; the first user IP address is one of the target IP addresses any user IP address.

Further, the response message set further includes the second correspondence information respectively corresponding to all the other SMF entities in the SMF set; wherein, redetermining the record information according to the response message set includes: : According to all the second correspondence information in the response message set, determine the user IP addresses that can be allocated by the other SMF entities corresponding to each of the second correspondences, and determine the user IP addresses of the other SMF entities. The occupancy information of the user IP addresses that can be allocated on the SMF entity is all unoccupied; according to all the second correspondence information in the response message set and the determined occupancy information, a re-determined occupancy information is obtained. the record information.

The second exemplary measure, dynamically maintaining the record information, includes: receiving an SMF restart message broadcast by the other SMF entity; feeding back a response message to the other SMF entity according to the SMF restart message; wherein the The response message at least includes information on the occupancy status of user IP addresses that can be allocated by the other SMF entities.

Among them, the user IP addresses that can be allocated by other SMF entities are the target IP addresses corresponding to other SMF entities; the measures here can be understood as the SMF maintaining the record information of the SMF, or it can be understood as assisting in maintaining the allocation of other SMF entities information.

The following describes the method for managing the IP address allocation of the IP address provided by the embodiment of the present application by way of example.

In view of the above technical problems, the embodiment of the present application provides a user IP address allocation management method, which can be specifically implemented as a method for UE IP address allocation by SMF in an SMF set and preventing address allocation conflicts, specifically:

In this solution, the UE IP address pool (that is, the set of IP addresses that can be allocated by all SMF entities in the SMF set) is divided according to the total number of SMFs in the SMF set (Set), and divided into multiple UE IP address blocks.

Assuming that the total number of SMFs in the SMF set (set) is M (M is an integer greater than or equal to 2), the allocatable UE IP address pool is divided into M blocks. This solution has no specific requirements on the segmentation target and segmentation method of the UE IP address pool, and can be flexibly formulated according to the operator's needs.

For example, the following segmentation goals can be achieved:

The average score;

Proportionately divided by the processing power of the SMF; or,

According to the selection priority weight of SMF.

For example, the following segmentation method can be used:

sequential segmentation; or,

hash split;

Finally, the allocatable UE IP address pool is divided into M blocks of UE IP address blocks.

(1) Each SMF in the SMF set (set) has only its own controllable and assignable UE IP address block (that is, the above-mentioned target IP address);

For the convenience of description, in this solution, the UE IP address blocks are numbered sequentially, starting from 1 to m (m corresponds to M, and m is an integer greater than or equal to 2). n represents the number of any UE IP address block.

An SMF in the set uniquely corresponds to a UE IP address block number (that is, different SMF entities correspond to different target IP addresses).

For a certain UE IP address block, it is uniquely assigned to a certain SMF in the SMF set.

Each SMF records (m,n) two parameters. m represents the total number of SMFs in the Set (that is, the total number of UE IP address blocks), and n represents the number of UE IP address blocks that SMF can control and assign. For details, see Figure 4 (XX.XX.XX.XX in the figure represents an IP address) .

(2) Each SMF in the SMF set (set) records (maintains) a UE IP address pool table (that is, records the above allocation information and the total information of the recorded information, the table is a presentation form), including all UE IP addresses block information.

Each SMF maintains a UE IP address pool table, which contains UE IP address information of all UE IP address blocks in the set.

Each UE IP address corresponds to two attributes, one is the address block number to which the UE IP address belongs; the other is the identification of whether the UE IP address is occupied (that is, the above occupancy information, occupied corresponds to the following unavailable, Occupied corresponds to the following available).

Through this UE IP address pool table, each SMF has its own controllable and assignable UE IP address block n, and also knows the UE IP address information that is not available to this SMF. In the column of whether the IP address is available, y means available, n means unavailable, and XX.XX.XX.XX means an IP address).

(3) Each SMF in the SMF set marks whether the UE IP address is available as needed, and dynamically maintains the UE IP address pool table.

3a. When the SMF is required to assign a new UE IP address, the SMF in the SMF set can only select and assign the UE IP address from the n-number UE IP address block that can be assigned and controlled by itself, and at the same time change the (assigned) UE Status flag of the IP address, from available to unavailable.

Combined with the recorded (m,n) parameters and the UE IP address pool table, the SMF obtains the list of UE IP addresses that can be allocated by the SMF from the n-numbered UE IP address block.

During session establishment or session modification, if SMF is required to allocate UE IP address, SMF (according to occupancy information) selects UE IP address from its own n-number UE IP address block and marks this (selected) UE IP address It has been allocated to be unavailable (that is, the occupancy information is changed from available to unavailable), as shown in Figure 6 (the PDU Session Establish in the figure indicates that the protocol data unit session is established, and y→n indicates that the status changes from available to unavailable). , other refer to the meaning represented in Figure 5).

It is required here that the SMF can and can only select and assign from its own n-number UE IP address block.

3b. When the control plane of the session is switched from SMF A to another SMF B in the SMF set, SMF A and B can dynamically mark the availability of this UE IP address.

After the session control plane is switched to SMF B, SMF B serves this session; see Figure 7 for details (see Figure 5 for the meaning of each symbol):

SMF A: When the UE IP address occupied by the session belongs to the n-number UE IP address block owned by this SMF, the mark remains unchanged, and the UE IP address is still unavailable; when the UE IP address occupied by the session does not belong to this SMF Owned block of UE IP address n, then change the flag from unavailable to available.

SMF B: When the UE IP address occupied by the session belongs to the n-number UE IP address block owned by this SMF, the mark remains unchanged, and the UE IP address is still unavailable; when the UE IP address occupied by the session does not belong to this SMF owns the n-number UE IP address block, then the flag is changed from available to unavailable.

3c. When SMF A releases the UE IP address, SMF A broadcasts the UE IP address release message on demand, and SMF A and other SMFs in the set dynamically mark the available state of the UE IP address.

SMF may release some UE IP addresses due to session release, session update, etc. For details, please refer to Figure 8 (see Figure 5 for the meaning of each symbol. Available UE IP Address list in Figure 8 represents the list of available UE IP addresses, and add represents the list of available UE IP addresses. UE IP address, 1 address of address block No. 1, 2 addresses of address block No. 2, and 1 address of address block No. m are released in Figure 8):

SMF A: When the released UE IP address belongs to the nth UE IP address block owned by this SMF, the flag is changed from unavailable to available; this UE IP address release message is not broadcast.

SMF A: When the released UE IP address does not belong to the n-number UE IP address block owned by this SMF, change the mark from unavailable to available, and broadcast the release message of the UE IP address (in order to allow the IP address to be released) Allocator knows).

Broadcast messages can contain the following:

(1) m, the total number of SMFs in this set;

(2) n, the IP address block number owned by this SMF;

(3) A list of released UE IP addresses, including one or more UE IP addresses.

Other SMFs in the set: When receiving the UE IP address release message, check and confirm that the UE IP address is marked as available in the locally maintained UE IP address pool table. If the UE IP address is marked as unavailable, the marking will be changed. is available.

(4) In the case that the allocation information and record information are lost, for example, after a certain SMF in the SMF set (set) restarts, the SMF broadcasts a restart message, and other SMFs in the set share the locally maintained UE IP address pool table, and restart the SMF Create and maintain the UE IP address pool table accordingly.

4a. After an SMF in the SMF set (set) restarts, the SMF broadcasts a restart message of this node to all SMFs in the set.

The restart message can contain the following:

(1) m, the total number of SMFs in this set;

(2) n, the IP address block number owned by this SMF;

(3) Recovery time, the restart time of this node.

4b: After receiving the restart message of a node, the SMF in the SMF set (set) shares the UE IP address pool table maintained by the node.

Shared information can include the following:

(1) m, the total number of SMFs in this set;

(2) n, the IP address block number owned by this SMF;

(3) UE IP address pool table.

For the content of the UE IP address pool table, refer to the content of the above section (2).

4c: The restarted SMF integrates the UE IP address pool table sent by each SMF, and creates and maintains its own UE IP address pool table.

Restart SMF to mark whether the UE IP address is available according to the information shared by other nodes:

(1) The IP addresses in the UE IP address block that are not owned (controllable and assignable) by the SMF are marked as available.

(2) The IP address in the UE IP address block owned by this SMF is taken or determined from all the collected annotation information.

The specific flow of 4a and 4b may be shown in FIG. 9 .

(5) Describe the processing logic and method for avoiding address allocation conflict by taking a specific scenario as an example.

Scenario: SMF A, SMF B, and SMF C form a set. SMF A assigns a UE IP address to a session from its own UE IP address block. After SMF A fails, the session control plane is switched from SMF A to SMF B. , and then switch to SMF C, then SMF A fails and restarts, and the session is switched from SMF C to SMF A.

1. SMF A is not faulty, then SMF A allocates a UE IP address for a session from its own assignable UE IP address block, and changes the flag (status flag) of this UE IP address to unavailable.

2. SMF A fails, and the session control plane is switched from SMF A to SMF B.

a) SMF A failure is not available.

b) SMF B processes the session, and SMF B changes the marking of the UE IP address maintained by this SMF (SMF B) from available to unavailable.

3. For some reason, the session control plane was switched from SMF B to SMF C.

a) SMF B changes the marking of the UE IP address maintained by this SMF (SMF B) from unavailable to available.

b) SMF C processes the session and changes the flag of the UE IP address maintained by this SMF (SMFC) from available to unavailable.

4. SMF A restarts.

a) SMF broadcasts a restart message to all other SMFs in the set.

b) Other SMFs in the set receive the restart message and share the UE IP address pool table of this node (that is, maintained by other SMFs).

c) The restarted SMF A summarizes the shared information and rebuilds its own UE IP address pool table.

1) All UE IP addresses that are not assignable by this node are marked as available;

2) The UE IP address that can be allocated by this node is fetched or confirmed according to the received tag information.

Specifically, in this scenario, for example: SMF A receives the marking of the above-mentioned UE IP address from SMF B as available, and SMF C marks the UE IP address as unavailable, then take the OR of the two markings, SMF A This UE IP address will be marked as unavailable.

5. For some reason, the control plane of the session is swapped from SMF C back to SMF A.

a) SMF C changes the marking of the UE IP address maintained by this SMF (SMFC) from unavailable to available.

b) SMF A handles the session, the UE IP address mark remains unchanged, and it is still unavailable.

Sub-scenario 1: SMF A releases this session.

6. SMF A releases the UE IP address and changes the marking of the UE IP address from unavailable to available.

Sub-scenario 2: The control plane of the session is switched from SMF A to SMF C. SMFC releases this session.

6. The session control plane is switched from SMF A to SMF C.

a) SMF A continues to mark this UE IP address as unavailable.

7. The SMF C releases the session and the UE IP address is also released.

a) SMF C marks the UE IP address maintained by this SMF (SMFC C) as available.

b) SMF C broadcasts the UE IP address release message.

c) SMF A receives the UE IP address release message from SMF C, checks the locally maintained UE IP address pool table, and finds that the UE IP address is marked as unavailable, then changes it to available.

d) SMF B receives the UE IP address release message from SMF C, checks the locally maintained UE IP address pool table, and finds that the UE IP address is marked as available, and does not handle it.

In this description, the "initial marking state" involved in the accompanying drawings refers to the marking state of the UE IP address pool table ( Including the marking status of the UE IP occupancy, that is, the marking status of the occupancy information).

As can be seen from the above, the solutions provided in the embodiments of the present application involve:

1. In the scheme where the SMF set is connected to the UPF (eg SSET, MPAS), the UE IP address is allocated by the SMF.

2. Each SMF in the SMF set has only its own controllable and assignable UE IP address block.

3. Each SMF in the SMF set (set) records (maintains) a UE IP address pool table, including all UE IP address block information.

4. Each SMF in the SMF set marks whether the UE IP address is available as needed, and dynamically maintains the UE IP address pool table.

(1) When the SMF is required to allocate a new UE IP address, the SMF in the SMF set can only select and allocate the UE IP address from the n-number UE IP address block that can be controlled and allocated by itself, and at the same time change the UE IP address. mark, from available to unavailable.

(2) When the control plane of the session is switched from SMF A to another SMF B in the SMF set, SMF A and B can dynamically mark the available state of the UE IP address.

(3) When SMF A releases the UE IP address, SMF A broadcasts the UE IP address release message as needed, and SMF A and other SMFs in the set dynamically mark the available state of the UE IP address.

5. After a SMF in the SMF set (set) restarts, the SMF broadcasts a restart message, and other SMFs in the set share the UE IP address pool table maintained locally, and the restart SMF creates and maintains the UE IP address pool table accordingly.

(1) After a certain SMF in the SMF set (set) restarts, the SMF broadcasts the restart message of this node to all SMFs in the set to which it belongs.

(2) After the SMF in the SMF set (set) receives a node restart message, it shares the UE IP address pool table maintained by the node.

(3) The restarted SMF integrates the UE IP address pool table sent by each SMF, and creates and maintains its own UE IP address pool table.

To sum up, the solution provided by the embodiments of the present application can realize the introduction of the concept of SMF set (set), and the user IP address allocation is performed by the SMF, while avoiding conflicts; the realization mechanism is: the user IP address pool is centralized according to the SMF. The total number of SMFs is divided, and each SMF is assigned to a corresponding non-conflicting IP address block, and each SMF maintains a general table of user IP address pools in the SMF, that is, each SMF has a list of exclusive available user IP addresses, and It also knows the IP address pool to which the user IP addresses that are not available to the SMF belong, and because the SMF marks the assigned IP addresses, the address assignment conflict caused by the SMF switching can be avoided.

The embodiment of the present application also provides an IP address allocation management device of the User Internet Protocol, which is applied to the SMF entity in the session management function SMF concentration, as shown in FIG. 10 , including:

A first obtaining module 101, configured to obtain allocation information of a target IP address, where the allocation information includes first correspondence information between the target IP address and the SMF entity and information on the occupancy of the target IP address;

a first allocation module 102, configured to allocate user IP addresses according to the allocation information;

The IP address allocation management device provided by the embodiment of the present application acquires the allocation information of the target IP address, where the allocation information includes the first correspondence information between the target IP address and the SMF entity and the occupancy information of the target IP address; according to the allocation information, perform user IP address allocation; wherein, the target IP address refers to at least one user IP address that can be allocated by the SMF entity; the SMF centralized Different SMF entities corresponding to different target IP addresses; it can realize the use of SMF in the SMF set to allocate UE IP addresses, and avoid address allocation conflicts, ensure the normal realization of UE IP address allocation, and then ensure the normal realization of sessions, very good It solves the problem that the session may not be realized in the related art.

Specifically, the first allocation module includes: a first determination submodule, configured to determine the occupancy information of the target IP address according to the allocation information; a first allocation submodule, used to determine the occupancy information according to the occupancy information, and select an unoccupied user IP address from the target IP addresses for allocation.

Further, the user Internet Protocol IP address allocation management device further includes: a second acquisition module, configured to acquire the record information of user IP addresses that can be allocated by other SMF entities in the SMF set; wherein, the The record information includes the second correspondence information between the other SMF entities and the user IP addresses that can be allocated by the other SMF entities, and the occupation of the user IP addresses that can be allocated by the other SMF entities on the SMF entity situation information.

Further, the user Internet Protocol IP address allocation management device further includes: a first maintenance module, configured to dynamically maintain the allocation information and record information.

Specifically, the first maintenance module includes: a first update sub-module, configured to update the occupancy information of the allocated user IP addresses after the user IP address allocation is performed according to the allocation information.

In a first example measure, the first maintenance module includes: a first processing sub-module for switching from the SMF entity to the other SMF entity on the control plane where a session exists, and the user occupied by the session In the case that the IP address belongs to the target IP address of the SMF entity, the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity is maintained as occupied; or, when there is a session control When the SMF entity is switched to the other SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the record information of the SMF entity The occupancy status information of the user IP address occupied by the session is updated from occupied to unoccupied.

A second exemplary measure, the first maintenance module includes: a second processing sub-module for switching from the other SMF entity to the SMF entity on the control plane of the existing session, and the user occupied by the session In the case that the IP address belongs to the target IP address of the SMF entity, the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity is maintained as occupied; or, when there is a session control In the case that the plane is switched from the other SMF entity to the SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the record information of the SMF entity The occupancy status information of the user IP address occupied by the session is updated from unoccupied to occupied.

In the first example measure, the first maintenance module includes: a third processing submodule, configured to release the user IP address in the presence of a session, and the released user IP address belongs to the target IP address of the SMF entity, Update the occupancy information of the released user IP address in the allocation information of the SMF entity from occupied to unoccupied; or, release the user IP address in the presence of a session, and the released user IP address does not belong to the In the case of the target IP address of the SMF entity, update the occupancy information of the released user IP address in the record information of the SMF entity from being occupied to being unoccupied; and broadcast the released user IP address address message.

In the second example measure, the first maintenance module includes: a first receiving sub-module for receiving a message of releasing the user IP address broadcast by the other SMF entities; a second updating sub-module for receiving the message according to the message , and the occupancy status information of the released user IP address is updated from occupied to unoccupied.

In the first example measure, the first maintenance module includes: a first broadcast sub-module, configured to broadcast a message of restarting the SMF entity to the other SMF entities when the allocation information and the record information are lost ; Receive the response message fed back by all other SMF entities in the SMF set according to the restart message of the SMF entity; the second determination sub-module is used to re-determine the allocation information and the record information according to the response message set; wherein, the The response message includes at least the first correspondence of the SMF entity and the occupancy information of the target IP address; the response message set includes response messages fed back by all other SMF entities in the SMF set.

Wherein, the second determination sub-module includes: a first determination unit, configured to re-determine the occupancy information corresponding to the target IP address according to the response message set; a first processing unit, configured to A corresponding relationship and the re-determined occupancy information to obtain the re-determined allocation information.

Specifically, the first determining unit includes: a first determining subunit, configured to re-determine the target IP address according to the first correspondence in the response message set; a second determining subunit, using The occupancy information corresponding to the target IP address is re-determined according to the re-determined target IP address and the occupancy information of the target IP address in the response message set.

More specifically, the second determining subunit is specifically configured to: in the case where the first occupancy information exists in the occupancy information of the first user IP address in the response message set, determine the first user The occupancy information of the IP address is occupied; otherwise, it is determined that the occupancy information of the first user IP address is not occupied; wherein, the first occupancy information is the information indicating that the first user IP address is occupied Occupancy information; the first user IP address is any user IP address in the target IP addresses.

Further, the response message set further includes the second correspondence information respectively corresponding to all the other SMF entities in the SMF set; wherein, the second determination sub-module includes: a second determination unit, is used to determine, according to all the second correspondence information in the response message set, user IP addresses that can be allocated by the other SMF entities corresponding to each of the second correspondences, and determine the other SMF entities The occupancy information of the user IP addresses that can be allocated on the SMF entity is all unoccupied; the third determining unit is used for all the second correspondence information in the response message set and the determined each The occupancy information is obtained to obtain the re-determined record information.

The second exemplary measure, the first maintenance module includes: a second receiving sub-module for receiving the SMF restart message broadcasted by the other SMF entities; a first feedback sub-module for receiving the SMF restart message according to the SMF restart message, and feed back a response message to the other SMF entity; wherein, the response message at least includes information on the occupation of the user IP address that can be allocated by the other SMF entity.

Wherein, the above-mentioned implementation embodiments of the user Internet Protocol IP address allocation management method are all applicable to the embodiments of the user Internet Protocol IP address allocation management device, and can also achieve the same technical effect.

The embodiment of the present application further provides a session management function SMF entity. The SMF entity is an SMF entity in the SMF set. As shown in FIG. 11 , the SMF entity includes: a processor 111 and a transceiver 112;

The processor 111 is configured to obtain allocation information of the target IP address, where the allocation information includes first correspondence information between the target IP address and the SMF entity and information on the occupancy of the target IP address;

According to the allocation information, perform user IP address allocation;

The session management function SMF entity provided in the embodiment of the present application obtains allocation information of a target IP address, where the allocation information includes first correspondence information between the target IP address and the SMF entity and the target IP address address occupancy information; according to the allocation information, perform user IP address allocation; wherein, the target IP address refers to at least one user IP address that can be allocated by the SMF entity; different SMF entities in the SMF set correspond to Different target IP addresses; can realize the use of SMF in the SMF set to allocate UE IP addresses, and avoid address allocation conflicts, ensure the normal implementation of UE IP address allocation, and then ensure the normal implementation of sessions, which is a good solution to related technologies. An issue where the session might not be possible.

Specifically, the processor is configured to include: determining occupancy information of the target IP address according to the allocation information; selecting an unoccupied user IP address from the target IP addresses according to the occupancy information to allocate.

Further, the processor is further configured to: obtain record information of user IP addresses that can be allocated by other SMF entities in the SMF set; wherein the record information includes the other SMF entities and the other SMF entities that can be assigned by the other SMF entities. The information on the second correspondence between the assigned user IP addresses and the occupancy information on the SMF entity of the user IP addresses that can be assigned by the other SMF entities.

Further, the processor is further configured to: dynamically maintain the allocation information and record information.

Specifically, the processor is specifically configured to: update the occupancy information of the assigned user IP address after assigning the user IP address according to the assignment information.

In the first example measure, the processor is specifically configured to: switch from the SMF entity to the other SMF entity on the control plane where a session exists, and the user IP address occupied by the session belongs to the target of the SMF entity In the case of an IP address, the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity is maintained as occupied; or, the SMF entity switches over the control plane where the session exists to the user IP address occupied by the session. In the case of the other SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the user IP address occupied by the session in the record information of the SMF entity The occupancy information is updated from occupied to unoccupied.

In the second example measure, the processor is specifically configured to: switch from the other SMF entity to the SMF entity on the control plane of the existing session, and the user IP address occupied by the session belongs to the target of the SMF entity In the case of an IP address, the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity is maintained as occupied; or, the other SMF entity switches to the control plane where the session exists. In the case of the SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the user IP address occupied by the session in the record information of the SMF entity is used. The occupancy information is updated from unoccupied to occupied.

In the first example measure, the processor is specifically configured to: in the case that a session releases the user IP address and the released user IP address belongs to the target IP address of the SMF entity, the allocation of the SMF entity The occupancy information of the released user IP address in the information is updated from being occupied to being unoccupied; or, in the presence of a session that releases the user IP address, and the released user IP address does not belong to the target IP address of the SMF entity Next, the occupancy information of the released user IP address in the record information of the SMF entity is updated from occupied to unoccupied; and the message of the released user IP address is broadcast through the transceiver.

In the second example measure, the processor is specifically configured to: receive a message of releasing the user IP address broadcast by the other SMF entities through the transceiver; according to the message, obtain information on the occupation of the user IP address to be released Updated from occupied to unoccupied.

In a first example measure, the processor is specifically configured to: in the case that the allocation information and the recording information are lost, broadcast the message of restarting the SMF entity to the other SMF entities through the transceiver; The transceiver receives a response message fed back by all other SMF entities in the SMF set according to the restart message of the SMF entity; re-determines the allocation information and record information according to the response message set; wherein the response message at least includes the The first correspondence of the SMF entity and the occupancy information of the target IP address; the response message set includes the response messages fed back by all other SMF entities in the SMF set.

The processor is specifically configured to: re-determine the occupancy information corresponding to the target IP address according to the set of response messages; obtain the re-determined occupancy information according to the first correspondence and the re-determined occupancy information distribution information.

Specifically, the processor is specifically configured to: re-determine the target IP address according to the first correspondence in the response message set; according to the re-determined target IP address and the response message set The occupancy information of the target IP address is determined, and the occupancy information corresponding to the target IP address is re-determined.

More specifically, the processor is specifically configured to: determine the occupation of the first user IP address in the case where the first occupation situation information exists in the occupation situation information of the first user IP address in the response message set The situation information is occupied; otherwise, it is determined that the occupancy information of the first user IP address is not occupied; wherein, the first occupancy information is occupancy information indicating that the first user IP address is occupied; The first user IP address is any user IP address in the target IP addresses.

Further, the response message set further includes the second correspondence information respectively corresponding to all the other SMF entities in the SMF set; wherein, the processor is specifically configured to: according to the response message set All the second corresponding relationship information, determine the user IP addresses that can be allocated by the other SMF entities corresponding to each of the second corresponding relationships, and determine the user IP addresses that can be allocated by the other SMF entities. The occupancy information on the SMF entity is all unoccupied; the re-determined record information is obtained according to all the second correspondence information in the response message set and each determined occupancy information.

In the second example measure, the processor is specifically configured to: receive, through the transceiver, an SMF restart message broadcast by the other SMF entity; The entity feeds back a response message; wherein, the response message at least includes information on the occupation of user IP addresses that can be allocated by the other SMF entities.

Wherein, the above-mentioned implementation embodiments of the IP address allocation management method of the User Internet Protocol are all applicable to the embodiments of the session management function SMF entity, and the same technical effect can also be achieved.

Wherein, the above-mentioned implementation embodiments of the IP address allocation management method of the user Internet Protocol are all applicable to the embodiments of the readable storage medium, and the same technical effect can also be achieved.

It should be noted that many functional components described in this specification are referred to as modules/submodules/units/subunits in order to more particularly emphasize the independence of their implementations.

In the embodiments of the present application, the modules/submodules/units/subunits may be implemented in software so as to be executed by various types of processors. For example, an identified executable code module may comprise one or more physical or logical blocks of computer instructions, which may be structured as objects, procedures, or functions, for example. Nonetheless, the executable code of the identified modules need not be physically located together, but may include different instructions stored in different bits which, when logically combined, constitute the module and implement the specification of the module Purpose.

In practice, an executable code module may be a single instruction or many instructions, and may even be distributed over multiple different code segments, among different programs, and across multiple memory devices. Likewise, operational data may be identified within modules, and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations (including over different storage devices), and may exist at least in part only as electronic signals on a system or network.

When a module can be implemented by software, taking into account the level of existing hardware technology, all modules that can be implemented by software, regardless of cost, can build corresponding hardware circuits to implement corresponding functions. The hardware circuits include conventional very large scale integration (VLSI) circuits or gate arrays as well as off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices, such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.

The above are optional embodiments of the present application. It should be pointed out that for those skilled in the art, without departing from the principles described in the present application, several improvements and modifications can be made, and these improvements and modifications should also be It is regarded as the protection scope of this application.

Claims

A method for managing the IP address allocation of the IP address of the User Internet Interconnection Protocol, which is applied to an SMF entity in a session management function SMF concentration, including:

Obtain allocation information of the target IP address, where the allocation information includes the first correspondence information between the target IP address and the SMF entity and the occupancy information of the target IP address;

According to the allocation information, perform user IP address allocation;

Wherein, the target IP address refers to at least one user IP address that can be allocated by the SMF entity;

Different SMF entities in the SMF set correspond to different target IP addresses.
The method for managing user IP address allocation according to claim 1, wherein the performing user IP address allocation according to the allocation information comprises:

According to the allocation information, determine the occupancy information of the target IP address;

According to the occupancy information, an unoccupied user IP address is selected from the target IP addresses for allocation.
The method for managing IP address allocation of the IP address according to claim 1 or 2, wherein, further comprising:

Obtain the record information of user IP addresses that can be allocated by other SMF entities in the SMF set;

The record information includes second correspondence information between the other SMF entities and user IP addresses that can be allocated by the other SMF entities, and the user IP addresses that can be allocated by the other SMF entities in the SMF Occupancy information on the entity.
The method for managing IP address allocation of the IP address according to claim 3, wherein, further comprising:

The allocation information and logging information are maintained dynamically.
The method for managing IP address allocation of the IP address according to claim 4, wherein the dynamic maintenance of the allocation information comprises:

After the user IP address is allocated according to the allocation information, the occupancy information of the allocated user IP address is updated.
User Internet Protocol IP address allocation management method according to claim 4, wherein, described dynamic maintenance described allocation information and record information, comprise:

In the case that the control plane of the session is switched from the SMF entity to the other SMF entity, and the user IP address occupied by the session belongs to the target IP address of the SMF entity, the SMF entity's The occupancy information of the user IP address occupied by the session in the allocation information is occupied; or,

In the case that the control plane of the session is switched from the SMF entity to the other SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the SMF entity's all The occupancy status information of the user IP address occupied by the session in the record information is updated from occupied to unoccupied.
The method for managing IP address allocation of the IP address according to claim 4, wherein the dynamic maintenance of the allocation information and the record information comprises:

In the case that the control plane of the existing session is switched from the other SMF entity to the SMF entity, and the user IP address occupied by the session belongs to the target IP address of the SMF entity, the SMF entity's said SMF entity is maintained. The occupancy information of the user IP address occupied by the session in the allocation information is occupied; or,

In the case that the control plane of the session is switched from the other SMF entity to the SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the SMF entity's all The occupancy status information of the user IP address occupied by the session in the record information is updated from unoccupied to occupied.
The method for managing IP address allocation of the IP address according to claim 4, wherein the dynamic maintenance of the allocation information and the record information comprises:

When there is a session release user IP address, and the released user IP address belongs to the target IP address of the SMF entity, the occupancy information of the released user IP address in the allocation information of the SMF entity is set by Occupied updated to unoccupied; or,

When there is a session release user IP address, and the released user IP address does not belong to the target IP address of the SMF entity, the occupancy information of the released user IP address in the record information of the SMF entity Update from occupied to unoccupied; and broadcast the message of the released user IP address.
User Internet Protocol IP address allocation management method according to claim 4, wherein, described dynamic maintenance described allocation information and record information, comprise:

receiving the message of releasing the user's IP address broadcasted by the other SMF entities;

According to the message, the occupancy status information of the released user IP address is updated from occupied to unoccupied.
The method for managing IP address allocation of the IP address according to claim 4, wherein the dynamic maintenance of the allocation information and the record information comprises:

In the case that the allocation information and the recording information are lost, broadcast a message of restarting the SMF entity to the other SMF entities;

receiving a response message fed back by all other SMF entities in the SMF set according to the restart message of the SMF entity;

Re-determine the allocation information and the record information according to the set of response messages;

Wherein, the response message includes at least the first correspondence of the SMF entity and the occupancy information of the target IP address;

The set of response messages includes response messages fed back by all other SMF entities in the SMF set.
The method for managing IP address allocation of the Internet Protocol for Users according to claim 10, wherein the re-determining the allocation information according to the set of response messages comprises:

According to the set of response messages, re-determine the occupancy information corresponding to the target IP address;

The re-determined allocation information is obtained according to the first corresponding relationship and the re-determined occupancy information.
The method for managing IP address allocation of the IP address according to claim 11, wherein the re-determining the occupancy information corresponding to the target IP address according to the response message set comprises:

Re-determining the target IP address according to the first correspondence in the response message set;

The occupancy information corresponding to the target IP address is re-determined according to the re-determined target IP address and the occupancy information of the target IP address in the response message set.
The method for managing IP address allocation according to claim 12, wherein, according to the re-determined target IP address and the occupancy information of the target IP address in the response message set, the Determine the occupancy information corresponding to the target IP address, including:

In the case where there is first occupancy information in the occupancy information of the first user IP address in the response message set, determine that the occupancy information of the first user IP address is occupied;

Otherwise, determine that the occupancy information of the first user IP address is not occupied;

Wherein, the first occupancy information is occupancy information indicating that the first user IP address is occupied;

The first user IP address is any user IP address in the target IP addresses.
The method for managing the IP address allocation of the IP address according to claim 10, wherein the response message set further includes the second correspondence information corresponding to all the other SMF entities in the SMF set;

Wherein, redetermining the record information according to the set of response messages includes:

According to all the second correspondence information in the response message set, determine the user IP addresses that can be allocated by the other SMF entities corresponding to each of the second correspondences, and determine the user IP addresses that can be allocated by the other SMF entities. The occupancy information of the assigned user IP address on the SMF entity is not occupied;

The re-determined record information is obtained according to all the second correspondence information in the response message set and each determined occupancy situation information.
The method for managing IP address allocation of the IP address according to claim 4, wherein the dynamic maintenance of the record information comprises:

receiving the SMF restart message broadcast by the other SMF entities;

Feeding back a response message to the other SMF entities according to the SMF restart message;

Wherein, the response message includes at least information on the occupation of user IP addresses that can be allocated by the other SMF entities.
A user Internet interconnection protocol IP address allocation management device, applied to the SMF entity in the session management function SMF concentration, including:

a first obtaining module, configured to obtain allocation information of the target IP address, where the allocation information includes the first correspondence information between the target IP address and the SMF entity and the occupancy information of the target IP address;

a first allocation module, configured to allocate user IP addresses according to the allocation information;

Wherein, the target IP address refers to at least one user IP address that can be allocated by the SMF entity;

Different SMF entities in the SMF set correspond to different target IP addresses.
The IP address allocation management device according to claim 16, wherein the first allocation module comprises:

a first determining submodule, configured to determine the occupancy information of the target IP address according to the allocation information;

The first allocation sub-module is configured to select an unoccupied user IP address from the target IP addresses for allocation according to the occupancy information.
The IP address allocation management device according to claim 16 or 17, further comprising:

The second obtaining module is used to obtain the record information of user IP addresses that can be allocated by other SMF entities in the SMF set;

The record information includes second correspondence information between the other SMF entities and user IP addresses that can be allocated by the other SMF entities, and the user IP addresses that can be allocated by the other SMF entities in the SMF Occupancy information on the entity.
The IP address allocation management device according to claim 18, wherein, further comprising:

The first maintenance module is used to dynamically maintain the allocation information and record information.
The IP address allocation management device according to claim 19, wherein the first maintenance module comprises:

The first update sub-module is configured to update the occupancy information of the allocated user IP address after the user IP address is allocated according to the allocation information.
The IP address allocation management device according to claim 19, wherein the first maintenance module comprises:

The first processing submodule is configured to, when the control plane of the session is switched from the SMF entity to the other SMF entity, and the user IP address occupied by the session belongs to the target IP address of the SMF entity, Maintain the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity as occupied; or,

In the case that the control plane of the session is switched from the SMF entity to the other SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the SMF entity's all The occupancy status information of the user IP address occupied by the session in the record information is updated from occupied to unoccupied.
The IP address allocation management device according to claim 19, wherein the first maintenance module comprises:

The second processing submodule is configured to, when the control plane of the session is switched from the other SMF entity to the SMF entity, and the user IP address occupied by the session belongs to the target IP address of the SMF entity, Maintain the occupancy status information of the user IP address occupied by the session in the allocation information of the SMF entity as occupied; or,

In the case that the control plane of the session is switched from the other SMF entity to the SMF entity, and the user IP address occupied by the session does not belong to the target IP address of the SMF entity, the SMF entity's all The occupancy status information of the user IP address occupied by the session in the record information is updated from unoccupied to occupied.
The IP address allocation management device according to claim 19, wherein the first maintenance module comprises:

The third processing submodule is configured to, when there is a session release user IP address, and the released user IP address belongs to the target IP address of the SMF entity, release the released user IP address in the allocation information of the SMF entity. The occupancy information of the user's IP address is updated from occupied to unoccupied; or,

When there is a session release user IP address, and the released user IP address does not belong to the target IP address of the SMF entity, the occupancy information of the released user IP address in the record information of the SMF entity Update from occupied to unoccupied; and broadcast the message of the released user IP address.
The IP address allocation management device according to claim 19, wherein the first maintenance module comprises:

The first receiving submodule, for receiving the message of releasing the user IP address broadcasted by the other SMF entities;

The second update sub-module is configured to update the occupancy information of the released user IP address from occupied to unoccupied according to the message.
The IP address allocation management device according to claim 19, wherein the first maintenance module comprises:

a first broadcasting sub-module, configured to broadcast a message of restarting the SMF entity to the other SMF entities when the allocation information and the recording information are lost;

receiving a response message fed back by all other SMF entities in the SMF set according to the restart message of the SMF entity;

a second determination submodule, configured to re-determine the allocation information and the record information according to the response message set;

Wherein, the response message includes at least the first correspondence of the SMF entity and the occupancy information of the target IP address;

The set of response messages includes response messages fed back by all other SMF entities in the SMF set.
The IP address allocation management device according to claim 25, wherein the second determination submodule comprises:

a first determining unit, configured to re-determine the occupancy information corresponding to the target IP address according to the response message set;

A first processing unit, configured to obtain the re-determined allocation information according to the first corresponding relationship and the re-determined occupancy information.
The apparatus for managing IP address allocation of the Internet Protocol for Users according to claim 26, wherein the first determining unit comprises:

a first determination subunit, configured to re-determine the target IP address according to the first correspondence in the response message set;

The second determining subunit is configured to re-determine the occupancy information corresponding to the target IP address according to the re-determined target IP address and the occupancy information of the target IP address in the response message set.
The IP address allocation management device according to claim 27, wherein the second determining subunit is specifically used for:

In the case where there is first occupancy information in the occupancy information of the first user IP address in the response message set, determine that the occupancy information of the first user IP address is occupied;

Otherwise, determine that the occupancy information of the first user IP address is not occupied;

Wherein, the first occupancy information is occupancy information indicating that the first user IP address is occupied;

The first user IP address is any user IP address in the target IP addresses.
The apparatus for managing the IP address allocation of the IP address according to claim 25, wherein the response message set further includes the second correspondence information corresponding to all the other SMF entities in the SMF set respectively;

Wherein, the second determination submodule includes:

A second determining unit, configured to determine, according to all the second correspondence information in the response message set, the user IP addresses that can be allocated by the other SMF entities corresponding to each of the second correspondences, and determine The occupancy information on the SMF entity of the user IP addresses that can be allocated by the other SMF entities is not occupied;

A third determining unit, configured to obtain the re-determined record information according to all the second correspondence information in the response message set and each determined occupancy situation information.
The IP address allocation management device according to claim 19, wherein the first maintenance module comprises:

a second receiving submodule, configured to receive the SMF restart message broadcast by the other SMF entities;

a first feedback submodule, configured to feed back a response message to the other SMF entities according to the SMF restart message;

Wherein, the response message at least includes information on the occupation of user IP addresses that can be allocated by the other SMF entities.
A session management function SMF entity, the SMF entity is an SMF entity in the SMF concentration, including: a processor and a transceiver;

The processor is configured to obtain allocation information of the target IP address, where the allocation information includes the first correspondence information between the target IP address and the SMF entity and the occupancy information of the target IP address;

According to the allocation information, perform user IP address allocation;

Wherein, the target IP address refers to at least one user IP address that can be allocated by the SMF entity;

Different SMF entities in the SMF set correspond to different target IP addresses.
A session management function SMF entity, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor; wherein, when the processor executes the program, the processor according to claim 1 to The user internet protocol IP address allocation management method described in any one of 15.
A readable storage medium having a program stored thereon, wherein, when the program is executed by a processor, the steps in the user Internet Protocol IP address allocation management method according to any one of claims 1 to 15 are implemented.
A computer program product, the computer program product being executed by at least one processor to implement the IP address allocation management method according to any one of claims 1-15.
A session management function SMF entity, the session management function SMF entity is configured to perform the IP address allocation management method according to any one of claims 1-15.