CN114363296B

CN114363296B - Address conflict detection method, user plane network element and control plane network element

Info

Publication number: CN114363296B
Application number: CN202011064968.2A
Authority: CN
Inventors: 包宸曦
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2023-07-25
Anticipated expiration: 2040-09-30
Also published as: CN114363296A

Abstract

The application discloses an address conflict detection method, a user plane network element, a control plane network element, a device and a medium, and relates to the technical field of mobile communication. The specific implementation scheme is as follows: after the user plane network element acquires the UE address of the PDU session, the user plane network element inquires the target UE address in the used UE address, and refuses to use the target UE address under the condition that the target UE address conflicts with the used UE address. Therefore, when the target UE address conflicts with the used UE address, the target UE address is refused to be used, the phenomenon of address conflict caused by repeated address allocation is avoided, and the utilization rate of address resources is improved.

Description

Address conflict detection method, user plane network element and control plane network element

Technical Field

The present disclosure relates to the field of mobile communications technologies, and in particular, to an address collision detection method, a user plane network element, a control plane network element, an apparatus, and a medium.

Background

Currently, the third Generation partnership project (3 rd Generation Partnership Project, abbreviated as 3 GPP) is conducting a dedicated study of the functional enhancement of the N4 interface (interface between the control plane and the user plane, using the packet forwarding control protocol (Packet Forwarding Control Protocol, abbreviated as PFCP)) in the fifth Generation mobile communication technology (5 th-Generation, abbreviated as 5G) network. The current specification (3 gpp TS 29.244) specifies that the User (UE IP) address/prefix can be allocated either by the Control Plane (CP) side or by the User Plane (UP) side, wherein the CP side is allocated as an optional function and the UP side is allocated as an optional function.

However, the unified allocation address on the CP side may cause a problem of address allocation conflict, for example, multiple session management functions (Session Management Function, abbreviated as SMFs) on the CP side may come from the same SMF set (not allocated with an address pool), different SMF sets, different equipment manufacturers, even different operators, and the SMFs may not be able to completely implement interconnection and data sharing. Therefore, their allocated UE IP/prefixes to the same user plane function (User Plane Function, UPF for short) may be duplicated and collided.

Disclosure of Invention

The address conflict detection method, the user plane network element, the control plane network element, the device and the medium are used for carrying out conflict detection when the address is allocated to the terminal, and the technical problem that the address is repeatedly or conflicts when the address is allocated to the terminal is avoided.

An address conflict detection method provided by an embodiment of a first aspect of the present application is used for a user plane network element, and the method includes:

acquiring a target terminal UE address of a protocol data unit PDU session;

querying the target UE address in the used UE addresses;

in case the target UE address conflicts with the used UE address, the use of the target UE address is refused.

Optionally, after querying the target UE address in the list of used UE addresses, the method further includes:

allowing the PDU session to proceed using the target UE address and adding the target UE address to a list of the used UE addresses without including the target UE address within the used UE address;

at the end of the PDU session, the target UE address is removed from the list of used UE addresses.

Optionally, the acquiring the target terminal UE address of the protocol data unit PDU session includes:

and receiving a data Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request sent by a control plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries the target UE address of the PDU session.

Optionally, after the rejecting the target UE address, the method includes:

and sending a PFCP session establishment response or a PFCP session modification response to the control plane network element, wherein the PFCP session establishment response or the PFCP session modification response carries the indication information of address conflict.

Optionally, before receiving the PFCP session establishment request or the PFCP session modification request sent by the control plane network element, the method further includes:

Transmitting a link message of a PFCP link to the control plane network element, wherein the link message carries information of an available address pool, and the PFCP link is used for bearing the PFCP session;

the available address pool is used for determining the target UE address by the control plane network element;

the link message is a PFCP link establishment request message, or a PFCP link update request message, or a PFCP link establishment response message for responding to the PFCP link establishment request message sent by the control plane network element.

Optionally, before the rejecting the target UE address, the method further includes:

updating the conflict times; wherein, the conflict times are continuous conflict times of addresses allocated by the control plane network element;

and determining that the conflict number is smaller than a number threshold.

Optionally, after updating the conflict number, the method further includes:

under the condition that the conflict times is greater than or equal to the times threshold value, configuring an address isolation area corresponding to the control surface network element; wherein, the address isolation area is configured with the used UE address of the control surface network element;

allowing the PDU session to proceed using the target UE address and adding the target UE address to a list of used UE addresses of the control plane network element;

At the end of the PDU session, the target UE address is removed from the control plane network element's used UE address.

An address conflict detection method provided by an embodiment of a second aspect of the present application is used for a control plane network element, and the method includes:

providing a target terminal UE address to a user plane network element;

updating an address when the user plane network element determines that the target UE address conflicts with a used UE address and the user plane network element refuses to use the target UE address;

and reassigning the updated address to the user plane network element.

Optionally, the providing the target terminal UE address to the user plane network element includes:

selecting the target UE address from an address pool;

and sending a Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request to the user plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries the target UE address of the PDU session.

Optionally, before the selecting the target UE address from the address pool, the method further includes:

receiving a link message of a PFCP link from the user plane network element, wherein the link message carries information of an available address pool, and the PFCP link is used for bearing a PFCP session;

Configuring the address pool according to the information of the available address pool;

Optionally, the updating the address when the user plane network element determines that the target UE address conflicts with an used UE address and the user plane network element refuses to use the target UE address includes:

under the condition that the user plane network element determines that the target UE address conflicts with a used UE address and the user plane network element refuses to use the target UE address, configuring a timer corresponding to the user plane network element for the target UE address;

and taking the address of the timer in the address pool, which is expired or is not configured with the timer, as the updated address.

An embodiment of a third aspect of the present application provides a user plane network element, including a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

Acquiring a target terminal UE address of a protocol data unit PDU session;

querying the target UE address in the used UE addresses;

allowing the PDU session to be conducted using the target UE address and adding the target UE address to the list of used UE addresses without including the target UE address in the list of used UE addresses;

Optionally, the rejecting the target UE address includes:

and determining that the conflict number is smaller than a number threshold.

Optionally, after updating the conflict number, the method further includes:

Allowing the PDU session to proceed using the target UE address and adding the target UE address to the control plane network element used UE address;

The control plane network element provided in the fourth aspect of the present application includes a memory, a transceiver, and a processor:

providing a target terminal UE address to a user plane network element;

and reassigning the updated address to the user plane network element.

selecting the target UE address from an address pool;

An address conflict detection apparatus provided in an embodiment of a fifth aspect of the present application is configured to be used in a user plane network element, and includes:

the acquisition module is used for acquiring the target terminal UE address of the protocol data unit PDU session;

a query module, configured to query, in the used UE addresses, the target UE address;

and the allocation module is used for refusing to use the target UE address under the condition that the target UE address conflicts with the used UE address.

An address conflict detection apparatus provided in an embodiment of a sixth aspect of the present application is configured to control a plane network element, including:

the processing module is used for providing a target terminal UE address for the user plane network element;

an updating module, configured to update an address when the UE determines that the target UE address conflicts with a used UE address and the UE refuses to use the target UE address;

and the execution module is used for reassigning the updated address to the user plane network element.

A seventh aspect of the present application provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, where the computer program is configured to cause the processor to execute the address conflict detection method according to the first aspect of the present application.

A processor-readable storage medium according to an eighth aspect of the present application stores a computer program for causing the processor to execute the address conflict detection method according to the second aspect of the present application.

One embodiment of the above application has the following advantages or benefits: after the user plane network element acquires the UE address of the PDU session, the user plane network element inquires the target UE address in the used UE address, and refuses to use the target UE address under the condition that the target UE address conflicts with the used UE address. Therefore, when the target UE address is determined to conflict with the used UE address, the target UE address is refused to be used, the phenomenon that the conflict exists when the address is used due to repeated address allocation is avoided, and the utilization rate of IP address resources is improved.

It should be understood that the description of this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.

Drawings

The drawings are for better understanding of the present solution and do not constitute a limitation of the present application. Wherein:

fig. 1 is a flowchart of an address conflict detection method according to an embodiment of the present application;

Fig. 2 is a flow chart of an address conflict detection method according to a second embodiment of the present disclosure;

fig. 3 is a flow chart of an address conflict detection method according to a third embodiment of the present application;

fig. 4 is an interaction schematic diagram of address conflict detection provided in a fourth embodiment of the present application;

fig. 5 is an interaction schematic diagram of address conflict detection provided in a fifth embodiment of the present application;

fig. 6 is a flowchart of an address conflict detection method provided in a sixth embodiment of the present application;

fig. 7 is a flow chart of an address conflict detection method according to a seventh embodiment of the present application;

FIG. 8 is an interactive schematic diagram of address conflict detection provided in an eighth embodiment of the present application;

fig. 9 is a schematic structural diagram of a user plane network element provided in a ninth embodiment of the present application;

fig. 10 is a schematic structural diagram of a control plane network element according to a tenth embodiment of the present application;

fig. 11 is a schematic structural diagram of an address collision detecting device according to an eleventh embodiment of the present application;

fig. 12 is a schematic structural diagram of an address collision detection apparatus according to a twelfth embodiment of the present application.

Detailed Description

In the embodiment of the application, the term "and/or" describes the association relationship of the association objects, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in the embodiments of the present application means two or more, and other adjectives are similar thereto.

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The embodiment of the application provides an address conflict detection method, a user plane network element, a control plane network element, a device and a medium, which are used for solving the technical problem that address allocation in a 5G network may have repetition or conflict in the related art.

The method and the device are based on the same application, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

Fig. 1 is a flowchart of an address conflict detection method according to an embodiment of the present application.

The execution body of the embodiment of the present application is an address conflict detection device provided in the present application, where the address conflict detection device may be configured in any user plane network element, so that the user plane network element may execute an address allocation function.

The user plane network element refers to a network element for controlling a user plane of the 5G core network.

As shown in fig. 1, the address conflict detection method, for a user plane network element, may include the following steps:

step 101, the target terminal UE address of the protocol data unit PDU session is obtained.

Where protocol data units (Protocol Data Unit, PDUs for short) refer to data units that are communicated between peer-to-peer layers in a hierarchical network structure. For example, in the Open Systems Interconnection (OSI) model, PDUs will be built at each layer of the transmission system.

The terminal UE address refers to an address allocated to the user terminal.

As a possible implementation manner, when the user plane network element receives the PFCP session establishment request sent by the control plane network element, the user plane network element may obtain the UE address of the PDU session because the PFCP session establishment request carries the target UE address of the PDU session.

For example, in a 5G network, when the SMF needs to establish a PDU session for the UPF, a PFCP session establishment request carrying the target UE address of the PDU session may be sent to the UPF, so that the user plane network element may obtain the target UE address for the PDU session.

As another possible implementation manner, the user plane network element receives the PFCP session modification request sent by the control plane network element, and the PFCP session modification request carries the target UE address of the PDU session, so that the user plane network element can obtain the target UE address for the PDU session.

For example, in a 5G network, when the SMF needs to modify the PDU session for the UPF, a PFCP session modification request carrying the target UE address of the PDU session may be sent to the UPF, so that the UPF obtains the target UE address of the PDU session.

It may be appreciated that before sending a PFCP session establishment request carrying a target UE address of a PDU session to a control plane network element, or sending a PFCP session modification request, the user plane network element needs to send a link message of a PFCP link to the control plane network element, so as to establish a PFCP session connection channel, so that the user plane network element may send the PDU session to the control plane network element through the PFCP link.

The link message of the PFCP link sent by the user plane network element to the control plane network element may carry information of the available address pool. And the available address pool is used for determining the target UE address by the control plane network element.

The PFCP link is also referred to as PFCP association in the 3GPP related proposal document and protocol, and the link message is a PFCP link establishment request message, or a PFCP link update request message, or a PFCP link establishment response message for responding to the PFCP link establishment request message sent by the control plane network element.

For example, the user plane network element may send a PFCP link establishment request message to the control plane network element, and after receiving the PFCP link establishment request message, the control plane network element returns a PFCP link establishment response to the user plane network element.

In this embodiment of the present application, the address pool may be configured manually, or may be configured in a global automation manner through a network management platform, which is not limited herein.

Step 102, in the used UE addresses, the target UE address is queried.

The used UE address refers to a UE address that the user terminal has used.

In the present application, after the user plane network element obtains the target UE address of the PDU session, it may query, in the used UE addresses, whether there is a target UE address in the used UE addresses. That is, after the target UE address of the PDU session is acquired, it is required to determine whether there is a collision between the target UE address and the used UE address.

It will be appreciated that the used UE address may be stored in a used UE address list or a used UE address library, and further, whether the target UE address exists in the used UE address is queried in the used UE address list or the used UE address library to determine whether there is a collision between the target UE address and the used UE address.

Step 103, refusing to use the target UE address in case the target UE address conflicts with the used UE address.

As a possible scenario of the embodiments of the present application, in the used UE address, when the target UE address is queried, it is determined that the target UE address already exists in the used UE address. At this point, it may be determined that the target UE address is already occupied, and that there is a conflict between the target UE address and the used UE address, in which case the user plane network element refuses to use the target UE address for the PDU session.

In a possible scenario, when the user plane network element receives a PFCP session establishment request carrying a target UE address of a PDU session sent by the control plane network element, the user plane network element queries the target UE address in the used UE address, and when it is determined that there is a conflict between the target UE address and the used UE address, the user plane network element may send a PFCP session establishment response carrying indication information of address conflict to the control plane network element.

In another possible scenario, when the user plane network element receives a PFCP session modification request carrying a target UE address of a PDU session sent by the control plane network element, the user plane network element queries the target UE address in the used UE address, and when it is determined that there is a conflict between the target UE address and the used UE address, the user plane network element may send a PFCP session modification response carrying indication information of address conflict to the control plane network element.

For example, the PFCP session setup response, or the indication information of the address conflict carried in the PFCP session modification response may be "the address is occupied", or the like.

According to the address conflict detection method, after the user plane network element obtains the UE address of the PDU session, the target UE address is queried in the used UE address, and under the condition that the target UE address conflicts with the used UE address, the target UE address is refused to be used. Therefore, when the target UE address is determined to conflict with the used UE address, the target UE address is refused to be used, the phenomenon that address use conflicts caused by repeated address allocation is avoided, and the utilization rate of IP address resources is improved.

In one possible implementation form of the embodiment of the present application, after the user plane network element queries the used UE address for the target UE address, there is a case that the list of used UE addresses does not include the target UE address. In this case, it is determined that the target UE address is unoccupied, and the target UE address may be used. The address conflict detection method provided in the embodiment of the present application is further described below with reference to the second embodiment.

Fig. 2 is a flowchart of an address conflict detection method according to a second embodiment of the present disclosure.

As shown in fig. 2, the address conflict detection method is used for a user plane network element, and may further include the following steps:

step 201, obtaining the target terminal UE address of the protocol data unit PDU session.

Step 202, the target UE address is queried among the used UE addresses.

In this embodiment of the present application, the implementation process of step 201 and step 202 may refer to the implementation process of step 101 and step 102 in the foregoing embodiment, which is not described herein again.

In case the target UE address is not included in the list of used UE addresses, step 203, the PDU session is allowed using the target UE address and the target UE address is added to the list of used UE addresses.

In the embodiment of the application, after the user plane network element acquires the target UE address of the PDU session, the user plane network element queries the target UE address in the used UE address, determines that the list of the used UE addresses does not contain the target UE address, and indicates that the target UE address is unoccupied and can be used. The user plane network element may send an indication to the control plane network element that there is no collision with the address, and further allow the PDU session to be performed using the target UE address, and add the target UE address to the list of used UE addresses.

It can be appreciated that adding the target UE address to the list of used UE addresses, when the user plane network element acquires the UE address of the PDU session again as the target UE address, the target UE address can be queried in the used UE address, thereby avoiding the problem of repeatedly allocating the target UE address.

In a possible scenario, when the user plane network element receives a PFCP session establishment request carrying a target UE address of a PDU session sent by the control plane network element, the user plane network element queries the target UE address in the used UE address, and under the condition that it is determined that the used UE address list does not include the target UE address, the user plane network element may send a PFCP session establishment response carrying indication information that there is no conflict in address to the control plane network element.

In another possible scenario, when the user plane network element receives a PFCP session modification request carrying a target UE address of a PDU session sent by the control plane network element, the user plane network element queries the target UE address in the used UE address, and in the case that it is determined that the used UE address list does not include the target UE address, the user plane network element may send a PFCP session modification response carrying indication information that there is no conflict in address to the control plane network element.

For example, the indication information that there is no conflict for an address may be "the address is available for use", "the address is unoccupied", or the like.

At the end of the PDU session, the target UE address is removed from the list of used UE addresses, step 204.

In the embodiment of the application, the user plane network element allows the PDU session to be performed according to the target UE address, adds the target UE address to the list of used UE addresses, and when the PDU session is ended and the target UE address is not used, can shift the target UE address out of the list of used UE addresses, so that the PDU session which is performed subsequently can continue to use the target UE address, thereby improving the utilization rate of address resources.

According to the address conflict detection method, after the user plane network element acquires the target terminal UE address of the PDU session, the user plane network element inquires the target UE address in the used UE addresses, allows the PDU session to be carried out by using the target UE address under the condition that the list of the used UE addresses does not contain the target UE address, and adds the target UE address into the list of the used UE addresses, so that the technical problem that the target UE address is repeatedly allocated is avoided, and when the PDU session is ended, the target UE address is removed from the list of the used UE addresses, so that the subsequent PDU session can still continue to use the target UE address, and the utilization rate of address resources is improved.

In a possible implementation manner of the embodiment of the present application, in a case where the user plane network element determines that the target UE address collides with the used UE address, it may be determined whether to reject allocation of the target UE address according to the number of collisions. The address conflict detection method provided in the embodiment of the present application is further described below with reference to the third embodiment.

Fig. 3 is a flow chart of an address conflict detection method according to a third embodiment of the present application.

As shown in fig. 3, the address conflict detection method is used for a user plane network element, and may further include the following steps:

step 301, obtaining the target terminal UE address of the protocol data unit PDU session.

In step 302, the target UE address is queried among the used UE addresses.

In this embodiment of the present application, the implementation process of step 301 and step 302 may refer to the implementation process of step 101 and step 102 in the foregoing embodiment, which is not described herein again.

In step 303, the number of collisions is updated.

Wherein the number of collisions is the number of consecutive collisions of addresses allocated by the control plane network element. For example, after the user plane network element obtains the target UE address to be allocated for the PDU session, if the target UE address is found in the used UE addresses, it is determined that a conflict exists between the target UE address and the used UE address.

In this embodiment of the present application, a counter may be set on the user plane network element side to record the number of times of collision between the target UE address and the used UE address, so that in the process of using the target UE address, the number of times of collision increases once when the allocated target UE address is refused to be used once. Thus, the number of collisions is updated in rejecting the use of the target UE address.

Step 304, it is determined whether the number of collisions is less than a number threshold.

The number threshold is a preset number of collisions, and is used for rejecting the maximum number of collisions using the target UE address.

In the embodiment of the present application, in the process of allocating the target UE address to the user plane network element, whether to continue to reject the target UE address may be determined according to the number of collisions between the target UE address and the used UE address.

In step 305, it is determined that the number of collisions is less than the number threshold, and the target UE address is denied.

In one possible case, the user plane network element determines that the number of collisions between the target UE address and the used UE address is less than a number threshold, and refuses to use the target UE address.

In the embodiment of the present application, when the user plane network element refuses to use the target UE address, the address of the updated PDU session sent by the control plane network element may be obtained again.

Step 306, configuring the address isolation area corresponding to the control plane network element when the number of collisions is greater than or equal to the number threshold.

Wherein the address isolation region is configured with the used UE address of the control plane network element.

In another possible case, in order to avoid that the target UE address is occupied, the target UE address is continuously rejected multiple times during address allocation, resulting in problems of increased signaling load, increased service delay, and the like, when the user plane network element determines that the number of times of collision between the target UE address and the used UE address is greater than or equal to the number threshold, the target UE address is not rejected.

In the embodiment of the present application, when the number of collisions is greater than or equal to the number threshold, the address isolation area corresponding to the control plane network element may be configured by technologies such as a port, a virtual local area network (Virtual Local Area Network, abbreviated as VLAN), a virtual machine, a container, etc.

It should be noted that the address isolation area is configured with the UE address used by the control plane network element. When a user plane network element has a plurality of address isolation regions, each address isolation region is configured with a respective used UE address.

Step 307, allowing the PDU session using the target UE address and adding the target UE address to the list of used UE addresses for the control plane network element.

In the embodiment of the application, after the address isolation area corresponding to the control plane network element is configured, PDU session is allowed to be performed by using the target UE address.

It should be noted that, after the PDU session is allowed to be performed using the target UE address, the target UE address needs to be added to the list of the used UE addresses of the control plane network element, so that the technical problem that address allocation conflicts due to repeated allocation of the target UE address is avoided.

At the end of the PDU session, the target UE address is removed from the list of used UE addresses by the control plane network element, step 308.

In the embodiment of the application, the user plane network element allows the PDU session to be performed by using the target UE address, adds the target UE address to the list of the used UE addresses, and when the PDU session is finished and the target UE address is not used, can remove the target UE address from the list of the used UE addresses, so that the subsequent PDU session can continue to use the target UE address, thereby improving the utilization rate of address resources.

According to the address conflict detection method, after a user plane network element obtains a target terminal UE address of a PDU session, in used UE addresses, the target UE address is inquired, the conflict times are updated under the condition that the target UE address conflicts with the used UE address, the conflict times are determined to be smaller than a time threshold value, the target UE address is refused to be used, the address isolation area corresponding to the control plane network element is configured under the condition that the conflict times are greater than or equal to the time threshold value, the target UE address is allowed to be used for carrying out address allocation of the PDU session, the target UE address is added to a list of the used UE addresses of the control plane network element, and the target UE address is removed from the list of the used UE addresses of the control plane network element when the PDU session is ended. Therefore, the problems of increased signaling load, increased service delay and the like caused by the fact that the target UE address is occupied and continuously refused for a plurality of times during address allocation are avoided, and in addition, the utilization rate of address resources is improved.

As an example, referring to fig. 4, fig. 4 is an interaction schematic diagram of address conflict detection provided in the fourth embodiment of the present application.

As shown in fig. 4, the address collision detection method may include the steps of:

step 401, the user plane network element sends a link message of the PFCP link to the control plane network element.

The link message carries information of an available address pool, and the PFCP link is used for bearing the PFCP session. The link message is a PFCP link setup request message, or a PFCP link update request message, or a PFCP link setup response message for responding to the PFCP link setup request message sent by the control plane network element.

It can be understood that the user plane network element sends a link message of the PFCP link to the control plane network element to establish a PFCP session connection channel, so that the user plane network element may send the PFCP session to the control plane network element through the PFCP link.

Step 402, the user plane network element receives a PFCP session establishment request or a PFCP session modification request sent by the control plane network element.

The PFCP session establishment request or the PFCP session modification request carries the target UE address of the PDU session.

In this embodiment of the present application, after receiving a PFCP session establishment request sent by a control plane network element, a user plane network element may acquire a target UE address of a PDU session.

In step 403, the user plane network element queries the target UE address among the used UE addresses.

In the present application, after the user plane network element obtains the target UE address to be allocated for the PDU session, it may query the used UE address for whether there is a target UE address in the used UE address. That is, after the target UE address to be allocated for the PDU session is acquired, it is required to determine whether there is a collision between the target UE address and the used UE address.

In step 404, the user plane network element determines that the use of the target UE address is denied in case the target UE address conflicts with an already used UE address.

As a possible scenario of the embodiments of the present application, in the used UE address, when the target UE address is queried, it is determined that the target UE address already exists in the used UE address. At this time, it may be determined that the target UE address is already occupied, and the target UE address collides with the used UE address, in which case the user plane network element refuses to use the target UE address for PDU session.

Step 405, the user plane network element sends a PFCP session establishment response, or a PFCP session modification response, to the control plane network element.

The PFCP session establishment response or the PFCP session modification response carries the indication information of address conflict.

In step 406, the user plane network element updates the number of collisions.

Step 407, if the user plane network element determines that the number of collisions is greater than or equal to the number threshold, configuring an address isolation region corresponding to the control plane network element.

Step 408, allowing a PDU session using the target UE address and adding the target UE address to a list of used UE addresses for the control plane network element.

At the end of the PDU session, the target UE address is removed from the list of used UE addresses for the control plane network element, step 409.

In this embodiment, the implementation process of step 407 to step 409 may refer to the implementation process of step 306 to step 308 in the above embodiment, which is not described herein again.

According to the address conflict detection method, a user plane network element sends a link message of a PFCP link to a control plane network element, a PFCP session establishment request carrying a target UE address to be allocated for PDU session or a PFCP session modification request sent by the control plane network element is received, the target UE address is inquired in a used UE address, the target UE address is refused to be used under the condition that the target UE address conflicts with the used UE address, and a PFCP session establishment response carrying an indication message of address conflict or a PFCP session modification response is sent to the control plane network element. Therefore, when the UE address to be allocated in the PDU session conflicts with the address in the used UE address list, the target UE address is refused to be used, and the technical problem of address allocation conflict is avoided. The user plane network element determines that the conflict times are smaller than a times threshold, refuses to use the target UE address, configures an address isolation area corresponding to the control plane network element under the condition that the conflict times are larger than or equal to the times threshold, allows PDU conversation to be carried out by using the target UE address, adds the target UE address into a list of used UE addresses of the control plane network element, and removes the target UE address from the list of used UE addresses of the control plane network element when the PDU conversation is finished. Therefore, the problems of increased signaling load, increased service delay and the like caused by the fact that the target UE address is occupied and continuously refused for a plurality of times during address allocation are avoided, and in addition, the utilization rate of address resources is improved.

As an example, referring to fig. 5, fig. 5 is an interaction schematic diagram of address conflict detection provided in a fifth embodiment of the present application.

As shown in fig. 5, the address collision detection method may include the steps of:

step 501, the user plane network element sends a link message of the PFCP link to the control plane network element.

Step 502, the user plane network element receives a PFCP session establishment request or a PFCP session modification request sent by the control plane network element.

In step 503, the user plane network element queries the target UE address among the used UE addresses.

In step 504, the user plane network element determines that the PDU session is allowed using the target UE address without including the target UE address in the list of used UE addresses, and adds the target UE address to the list of used UE addresses.

In this embodiment, the implementation process of step 504 may refer to the implementation process of step 203 of the second embodiment, which is not described herein.

In step 505, the user plane network element sends a PFCP session establishment response, or a PFCP session modification response, to the control plane network element.

The PFCP session establishment response or the PFCP session modification response carries indication information of successful address allocation.

In a possible scenario, when the user plane network element receives a PFCP session establishment request carrying a target UE address of a PDU session sent by the control plane network element, the user plane network element queries the target UE address in the used UE address, and under the condition that it is determined that the list of the used UE addresses does not contain the target UE address, the user plane network element allows the PDU session to be performed by using the target UE address, and sends a PFCP session establishment response carrying indication information of successful address allocation to the control plane network element.

In another possible scenario, when the user plane network element receives a PFCP session modification request carrying a target UE address of a PDU session sent by the control plane network element, the user plane network element queries the target UE address in the used UE address, and when it is determined that the list of the used UE addresses does not include the target UE address, the user plane network element allows the PDU session to be performed using the target UE address, and sends a PFCP session modification response carrying indication information of successful address allocation to the control plane network element.

At the end of the PDU session, the target UE address is removed from the list of used UE addresses, step 506.

In this embodiment, the implementation process of step 506 may refer to the implementation process of step 204 in the second embodiment, which is not described herein.

According to the address conflict detection method, the user plane network element sends the link message of the PFCP link to the control plane network element, the user plane network element receives the PFCP session establishment request or the PFCP session modification request sent by the control plane network element, the user plane network element inquires the target UE address in the used UE address, under the condition that the list of the used UE address does not contain the target UE address, the target UE address is allowed to be used for PDU session, the target UE address is added to the list of the used UE address, and therefore the problem that the target UE address is repeatedly allocated is avoided, and when the PDU session is ended, the target UE address is removed from the list of the used UE address, so that the subsequent PDU session can continue to use the target UE address, and the utilization rate of address resources is improved.

In order to achieve the above embodiments, the embodiments of the present application provide an address conflict detection method.

Fig. 6 is a flowchart of an address conflict detection method provided in a sixth embodiment of the present application.

The execution body of the embodiment of the application provides the address conflict detection device, and the address conflict detection device can be configured on any control plane network element so that the control plane network element executes an address allocation function.

As shown in fig. 6, the address collision detection method, used for a control plane network element, may include the following steps:

step 601, providing a target terminal UE address to a user plane network element.

In the embodiment of the present application, after receiving the link message of the PFCP link from the user plane network element, the control plane network element may establish the PFCP session connection channel, so that the user plane network element may send the PDU session to the control plane network element through the PFCP link. The link message carries information of an available address pool, and the PFCP link is used for bearing the PFCP session.

In one possible scenario, the control plane network element sends a PFCP session establishment request carrying a target UE address of the PDU session to the user plane network element, so that the control plane network element may provide the target UE address to the user plane network element.

In another possible scenario, the control plane network element sends a PFCP session modification request carrying a target UE address to be allocated for the PDU session to the user plane network element, so that the control plane network element may provide the target UE address to the user plane network element.

In step 602, in case the user plane network element determines that the target UE address conflicts with the used UE address, and the user plane network element refuses to use the target UE address, the address is updated.

In the embodiment of the present application, after the control plane network element provides the target UE address to the user plane network element, the user plane network element queries the target UE address in the used UE address, and if it is determined that the target UE address conflicts with the used UE address, the user plane network element refuses to use the target UE address. In this case, the control plane network element may re-provide the user plane network element with the address for updating the target UE address.

As a possible implementation manner, in a case that the user plane network element determines that the target UE address conflicts with the used UE address, and the user plane network element refuses to use the target UE address, the control plane network element may configure a timer corresponding to the user plane network element for the target UE address, and use an address of the timer that has expired or is not configured in the address pool as the updated address.

For example, assuming that the timer of the UE address corresponding to the UE is set to 15 minutes, when the UE determines that the UE address conflicts with the used UE address, the UE address may not be allocated within 15 minutes, and the address of the timer in the address pool that has expired or is not configured as the updated address.

Optionally, after the control plane network element provides the target UE address to the user plane network element, if the user plane network element determines that the target UE address collides with the used UE address, it determines that the number of continuous collisions is smaller than the number threshold, and refuses to use the target UE address. Wherein the number of collisions is the number of consecutive collisions of addresses allocated by the control plane network element.

Optionally, after the control plane network element provides the target UE address to be allocated to the user plane network element, if the user plane network element determines that the target UE address collides with the used UE address, and determines that the number of continuous collisions is greater than or equal to the number threshold, the address isolation area corresponding to the control plane network element is configured, the PDU session is allowed to be performed by using the target UE address, the target UE address is added to the list of the used UE addresses of the control plane network element, and when the PDU session is ended, the target UE address is removed from the list of the used UE addresses of the control plane network element.

Step 603, reassigning the updated address to the user plane network element.

In this embodiment, after the control plane network element updates the address for the PDU session, the updated address may be reassigned to the user plane network element.

According to the address conflict detection method, a control plane network element provides a target terminal UE address for a user plane network element, and when the user plane network element determines that the target UE address conflicts with a used UE address and the user plane network element refuses to use the target UE address, the address is updated, and the updated address is allocated to the user plane network element again. Therefore, under the condition that the target UE address conflicts with the used UE address, the control plane network element allocates the updated address to the user plane network element again, and the technical problem of conflict during address allocation is avoided.

In another possible implementation manner of the embodiment of the present application, after the control plane network element provides the target UE address to the user plane network element, when the user plane network element determines that the list of used UE addresses does not include the target UE address, the user plane network element allows the PDU session to be performed using the target UE address, and adds the target UE address to the list of used UE addresses. The user plane network element sends a PFCP session establishment response or a PFCP session modification response to the control plane network element, wherein the PFCP session establishment response or the PFCP session modification response carries indication information of successful address allocation. At the end of the PDU session, the target UE address is removed from the list of used UE addresses, thereby facilitating improved utilization of address resource allocation.

In a possible implementation manner of the present application, when the control plane network element provides the target UE address to the user plane network element in the above step 601, the target UE address may be selected from a pre-configured address pool, and further, by sending a PFCP session establishment request or a PFCP session modification request carrying the target UE address of the PDU session to the user plane network element, the user plane network element obtains the target UE address of the PDU session. Fig. 7 is a flow chart of an address conflict detection method according to the seventh embodiment of the present application.

As shown in fig. 7, the step 601 may further include the following steps:

step 701, a link message of a PFCP link is received from a user plane network element.

The link message carries information of an available address pool, and the PFCP link is used for bearing the PFCP session.

In the embodiment of the present application, before the control plane network element and the user plane network element establish the PFCP session, a PFCP session connection channel needs to be established, so that the control plane network element may send a PFCP session establishment request or a PFCP session modification request to the user plane network element through a PFCP link, so as to establish a PDU session.

Optionally, the link message is a PFCP link setup request message, or a PFCP link update request message, or a PFCP link setup response message for responding to the PFCP link setup request message sent by the control plane network element.

In one possible scenario, when a PFCP link needs to be established between a user plane network element and a control plane network element, the control plane network element may send a PFCP link establishment request message to the user plane network element.

In another possible scenario, when the PFCP link needs to be updated between the user plane network element and the control plane network element, the control plane network element may send a PFCP link update request message to the user plane network element.

In another possible scenario, when a PFCP link needs to be established between the user plane network element and the control plane network element, the control plane network element may send a PFCP link establishment request message to the user plane network element, and after receiving the PFCP link establishment request message, the user plane network element responds to the PFCP link establishment request message to return a PFCP link establishment response message to the control plane network element.

Step 702, configuring an address pool according to information of the available address pool.

In this embodiment of the present application, after receiving a message carrying an available address pool of a PFCP link from a user plane network element, the control plane network element may configure the address pool according to the message of the available address pool.

It should be noted that, when the control plane network element configures the address pool according to the message of the available address pool, the control plane network element may be manually configured, may be configured by the network management platform in a global automation unified manner, and may also be configured in other manners, which is not limited herein. The configured address pool may be stored in the control plane network element or may be stored in an external server, which is not limited herein.

In step 703, the target UE address is selected from the address pool.

Step 704, a PFCP session establishment request, or a PFCP session modification request, is sent to the user plane network element.

In the embodiment of the application, the control plane network element may send a PFCP session establishment request or a PFCP session modification request to the user plane network element through the already established PFCP link.

In one possible case, when a PFCP session needs to be established between the control plane network element and the user plane network element, the control plane network element may send a PFCP session establishment request carrying the target UE address of the PDU session to the user plane network element. Further, after the user plane network element acquires the target UE address of the PDU session, it is determined whether the target UE address conflicts with the used UE address, so as to determine whether to use the acquired target UE address.

In another possible case, when the PFCP session needs to be modified between the control plane network element and the user plane network element, the control plane network element may send a PFCP session modification request carrying the target UE address of the PDU session to the user plane network element. Further, after the user plane network element acquires the target UE address of the PDU session, it is determined whether the target UE address conflicts with the used UE address, so as to determine whether to use the acquired target UE address.

According to the address conflict detection method, after receiving the link message of the PFCP link from the user plane network element, the control plane network element configures an address pool according to the information of the available address pool, selects a target UE address from the address pool, and sends a PFCP session establishment request or a PFCP session modification request carrying the target UE address of the PDU session to the user plane network element. Therefore, the control plane network element sends the target UE address of the PDU session to the user plane network element according to the established PFCP link, so that the user plane network element judges whether the obtained target UE address conflicts with the used UE address or not and determines whether to use the target UE address or not, and the technical problem of conflict in address allocation is avoided.

As an example, referring to fig. 8, fig. 8 is an interaction schematic diagram of address conflict detection provided in the eighth embodiment of the present application.

As shown in fig. 8, the address conflict detection method may include the steps of:

in step 801, a user plane network element sends a link message of a PFCP link to a control plane network element.

Step 802, the control plane network element configures an address pool according to information of the available address pool.

In step 803, the control plane network element selects the target UE address from the address pool.

In step 804, the control plane network element sends a PFCP session establishment request, or a PFCP session modification request, to the user plane network element.

In step 805, after receiving the target UE address of the PDU session, the user plane network element determines that the target UE address conflicts with the used UE address, and the user plane network element refuses to use the target UE address.

Step 806, the user plane network element sends a PFCP session establishment response, or a PFCP session modification response, to the control plane network element.

In step 807, the control plane network element updates the address.

Step 808, the control plane network element reassigns the updated address to the user plane network element.

It should be noted that, for the specific implementation process of steps 801 to 808 in the embodiment of the present application, reference may be made to the implementation process of the sixth embodiment and the seventh embodiment, which are not described herein again.

The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (general packet Radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

In order to implement the above embodiment, the present application proposes a user plane network element.

Fig. 9 is a schematic structural diagram of a user plane network element provided in a ninth embodiment of the present application.

As shown in fig. 9, the user plane network element may include: a memory 110, a transceiver 120, and a processor 130.

Wherein the memory 110 is used for storing a computer program; a transceiver 120 for transceiving data under the control of the processor 130; a processor 130 for reading the computer program in the memory 110 and performing the following operations: acquiring a target terminal UE address of a protocol data unit PDU session; querying a target UE address in the used UE addresses; in case the target UE address conflicts with an already used UE address, the use of the target UE address is refused.

A transceiver 120 for receiving and transmitting data under the control of a processor 130.

Wherein in fig. 10, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 130 and various circuits of memory represented by memory 110, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 120 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, and the like.

The processor 130 is responsible for managing the bus architecture and general processing, and the memory 110 may store data used by the processor 130 in performing operations.

Processor 130 may be a Central Processing Unit (CPU), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or complex programmable logic device (Complex Programmable Logic Device, CPLD), and may also employ a multi-core architecture.

In one possible implementation form of the present application, after querying the target UE address in the used UE address, the method may further include: allowing a PDU session using the target UE address and adding the target UE address to the list of used UE addresses in the case that the target UE address is not included in the list of used UE addresses; at the end of the PDU session, the target UE address is removed from the list of used UE addresses.

In another possible implementation form of the present application, acquiring the target terminal UE address of the protocol data unit PDU session may include: and receiving a data Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request sent by the control plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries a target User Equipment (UE) address of the PDU session.

In another possible implementation form of the present application, after rejecting the target UE address, the method may further include: and sending a PFCP session establishment response or a PFCP session modification response to the control plane network element, wherein the PFCP session establishment response or the PFCP session modification response carries the indication information of address conflict.

In another possible implementation form of the present application, before receiving the PFCP session establishment request sent by the control plane network element or the PFCP session modification request, the method may further include: transmitting a link message of a PFCP link to a control plane network element, wherein the link message carries information of an available address pool, and the PFCP link is used for bearing a PFCP session; wherein, the available address pool is used for the control plane network element to determine the target address of the UE; the link message is a PFCP link setup request message, or a PFCP link update request message, or a PFCP link setup response message for responding to the PFCP link setup request message sent by the control plane network element.

In another possible implementation form of the present application, before rejecting the target UE address, the method may further include: updating the conflict times; wherein the conflict times are continuous conflict times of addresses allocated by the control plane network element; the number of collisions is determined to be less than a number threshold.

In another possible implementation form of the present application, after updating the number of conflict times, the method may further include: under the condition that the conflict times is greater than or equal to a time threshold value, configuring an address isolation area corresponding to the control surface network element; the address isolation area is configured with the used UE address of the control surface network element; allowing a PDU session to be conducted by using the target UE address, and adding the target UE address to a list of used UE addresses of the control plane network element; at the end of the PDU session, the target UE address is removed from the list of control plane network elements used UE addresses.

It should be noted that, the user plane network element provided in the embodiment of the present invention can implement all the method steps implemented in the embodiments of the methods of fig. 1 to 3, and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the embodiments of the methods are omitted herein.

In order to implement the above embodiment, the present application proposes a control plane network element.

Fig. 10 is a schematic structural diagram of a control plane network element according to a tenth embodiment of the present application.

As shown in fig. 10, the control plane network element may include: memory 210, transceiver 220, and processor 230.

Wherein the memory 210 is used for storing a computer program; a transceiver 220 for transceiving data under the control of the processor 230; a processor 230 for reading the computer program in the memory 210 and performing the following operations: providing a target terminal UE address to a user plane network element; updating the address under the condition that the user plane network element determines that the target UE address conflicts with the used UE address and the user plane network element refuses to use the target UE address; and reassigning the updated address to the user plane network element.

In one possible implementation form of the present application, providing the target terminal UE address to the user plane network element may include: selecting a target UE address from an address pool; and sending a data Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request to the user plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries a target User Equipment (UE) address to be allocated for PDU session.

In another possible implementation form of the present application, before selecting the target UE address from the address pool, the method may further include: receiving a link message of a PFCP link from a user plane network element, wherein the link message carries information of an available address pool, and the PFCP link is used for bearing a PFCP session; configuring an address pool according to the information of the available address pool; the link message is a PFCP link establishment request message, or a PFCP link update request message, or a PFCP link establishment response message for responding to the PFCP link establishment request message sent by the control plane network element.

In another possible implementation form of the present application, in a case that the user plane network element determines that the target UE address conflicts with the used UE address, and the user plane network element refuses to use the target UE address, the method may further include: under the condition that the user plane network element determines that the target UE address conflicts with the used UE address and the user plane network element refuses to use the target UE address, configuring a timer corresponding to the user plane network element for the target UE address; and taking the address of which the timer in the address pool is expired or is not configured as the updated address.

It should be noted that, the user plane network element provided in the embodiment of the present invention can implement all the method steps implemented in the embodiments of the methods of fig. 6 to fig. 7, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the embodiments of the methods are omitted herein.

In order to achieve the above embodiments, an embodiment of the present application provides an address conflict detection apparatus.

Fig. 11 is a schematic structural diagram of an address collision detection apparatus according to an eleventh embodiment of the present application.

As shown in fig. 11, the address collision detection apparatus 300, for a user plane network element, may include: acquisition module 310, query module 320, and assignment module 330.

The acquiring module 310 is configured to acquire a target terminal UE address of a protocol data unit PDU session.

A querying module 320, configured to query the used UE address for the target UE address.

The allocation module 330 is configured to refuse to use the target UE address in case the target UE address conflicts with an already used UE address.

In one possible implementation form of the present application, the address conflict detection apparatus 300 may further include:

an adding module, configured to allow a PDU session to be performed using the target UE address and add the target UE address to the list of used UE addresses, where the list of used UE addresses does not include the target UE address;

And the removing module is used for removing the target UE address from the list of the used UE addresses when the PDU session is ended.

In another possible implementation form of the present application, the obtaining module 310 may be further configured to:

and receiving a data Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request sent by the control plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries a target User Equipment (UE) address to be allocated for PDU session.

In another possible implementation form of the present application, the allocation module 330 may be further configured to:

In another possible implementation form of the present application, the address conflict detection apparatus 300 may further include:

the sending module is used for sending a link message of a PFCP link to the control plane network element, wherein the link message carries information of an available address pool, and the PFCP link is used for bearing the PFCP session;

wherein, the available address pool is used for the control plane network element to determine the target UE address;

the link message is a PFCP link setup request message, or a PFCP link update request message, or a PFCP link setup response message for responding to the PFCP link setup request message sent by the control plane network element.

the updating module is used for updating the conflict times; wherein the number of collisions is the number of consecutive collisions of addresses allocated by the control plane network element.

And the determining module is used for determining that the conflict number is smaller than the number threshold.

the configuration module is used for configuring the address isolation area corresponding to the control surface network element under the condition that the conflict times are greater than or equal to the time threshold value; the address isolation area is configured with the used UE address of the control surface network element;

an adding module, configured to allow a PDU session to be performed using the target UE address, and add the target UE address to a list of used UE addresses of the control plane network element;

and the removing module is used for removing the target UE address from the list of used UE addresses of the control plane network element when the PDU session is ended.

It should be noted that, the address conflict detection apparatus provided in the embodiment of the present invention can implement all the method steps implemented in the method embodiments of fig. 1 to 3, and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiments in the embodiment are omitted herein.

In order to implement the above embodiments, another address conflict detection apparatus is proposed in the embodiments of the present application.

As shown in fig. 12, the address collision detection apparatus 400, configured to control a plane network element, may include: a processing module 410, an updating module 420, and an executing module 430.

The processing module 410 is configured to provide the user plane network element with the target terminal UE address.

The updating module 420 is configured to update the address when the user plane network element determines that the target UE address conflicts with the used UE address, and the user plane network element refuses to use the target UE address.

And an execution module 430, configured to reassign the updated address to the user plane network element.

In one possible implementation form of the present application, the processing module 410 may be further configured to:

selecting a target UE address from an address pool;

and sending a data Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request to the user plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries the target UE address to be allocated for PDU session.

In another possible implementation form of the present application, the address conflict detection apparatus 400 may further include:

The receiving module is used for receiving a link message of the PFCP link from the user plane network element, wherein the link message carries information of an available address pool, and the PFCP link is used for bearing a PFCP session;

the configuration module is used for configuring the address pool according to the information of the available address pool;

In another possible implementation form of the present application, the update module 420 may be further configured to:

under the condition that the user plane network element determines that the target UE address conflicts with the used UE address and the user plane network element refuses to use the target UE address, configuring a timer corresponding to the user plane network element for the target UE address;

and taking the address of which the timer in the address pool is expired or is not configured as the updated address.

It should be noted that, the address conflict detection apparatus provided in the embodiment of the present invention can implement all the method steps implemented in the method embodiments of fig. 6 to fig. 7, and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiments in the embodiment are omitted herein.

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

To implement the above embodiment, the present application also proposes a processor-readable storage medium.

The processor-readable storage medium stores a computer program for causing the processor to execute the address conflict detection method described in the embodiments of fig. 1 to 3 of the present application.

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memories (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memories (e.g., CD, DVD, BD, HVD, etc.), semiconductor memories (e.g., ROM, EPROM, EEPROM, nonvolatile memories (NAND FLASH), solid State Disks (SSDs)), etc.

To implement the above embodiments, the present application also proposes another processor-readable storage medium.

Wherein the processor readable storage medium stores a computer program for causing the processor to execute the address conflict detection method described in the embodiments of fig. 6 and 7 of the present application.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. An address collision detection method, wherein the method is used for a user plane network element, and the method comprises:

receiving a data Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request sent by a control plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries a target User Equipment (UE) address of a PDU session;

querying the target UE address in the used UE addresses;

refusing to use the target UE address in case the target UE address conflicts with the used UE address;

2. The address collision detection method according to claim 1, wherein after the refusing to use the target UE address, further comprising:

3. The method for detecting address collision according to claim 1, wherein before receiving the PFCP session establishment request or the PFCP session modification request sent by the control plane network element, the method further comprises:

4. The address collision detection method according to any one of claims 1 to 3, wherein before the refusing to use the target UE address, further comprising:

and determining that the conflict number is smaller than a number threshold.

5. The method for detecting address collision according to claim 4, further comprising, after said updating the number of collisions:

at the end of the PDU session, the target UE address is removed from the list of used UE addresses for the control plane network element.

6. An address collision detection method, wherein the method is used for a control plane network element, and the method comprises:

selecting a target UE address from an address pool;

sending a data Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request to a user plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries the target UE address of a PDU session;

updating a target UE address under the condition that the user plane network element determines that the target UE address conflicts with a used UE address and the user plane network element refuses to use the target UE address;

and reassigning the updated target UE address to the user plane network element.

7. The method for detecting address collision according to claim 6, wherein before selecting the target UE address from the address pool, further comprising:

8. The address collision detection method according to any one of claims 6 to 7, wherein the updating the target UE address in a case where the user plane network element determines that the target UE address collides with an already used UE address and the user plane network element refuses to use the target UE address, comprises:

9. A user plane network element comprising a memory, a transceiver, and a processor:

querying the target UE address in the used UE addresses;

10. The user plane network element of claim 9, wherein after the refusing to use the target UE address, further comprising:

11. The user plane network element of claim 9, wherein before receiving the PFCP session establishment request or the PFCP session modification request sent by the control plane network element, further comprises:

the available address pool is used for determining the target address of the UE by the control plane network element;

12. The user plane network element of any of claims 9-11, wherein prior to the refusing to use the target UE address, further comprising:

and determining that the conflict number is smaller than a number threshold.

13. The user plane network element of claim 12, wherein after the updating the number of collisions, further comprising:

14. A control plane network element comprising a memory, a transceiver, and a processor:

selecting a target UE address from an address pool;

15. The control plane network element of claim 14, wherein prior to selecting the target UE address from the address pool, further comprising:

16. The control plane network element according to any of claims 14-15, wherein updating the target UE address in case the user plane network element determines that the target UE address conflicts with an already used UE address and the user plane network element refuses to use the target UE address comprises:

17. An address collision detection apparatus, wherein the apparatus is configured for a user plane network element, and comprises:

an allocation module, configured to refuse to use the target UE address if the target UE address conflicts with the used UE address;

the acquisition module is specifically configured to:

receiving a data Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request sent by a control plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries the target UE address of the PDU session;

The device is also for:

18. An address collision detection apparatus, wherein the apparatus is configured to control a plane network element, and comprises:

the processing module is used for providing a target UE address for the user plane network element;

an updating module, configured to update a target UE address when the UE determines that the target UE address conflicts with a used UE address and the UE uses the target UE address;

an execution module, configured to reassign the updated target UE address to the user plane network element;

the processing module is specifically configured to:

selecting the target UE address from an address pool;

and sending a Packet Forwarding Control Protocol (PFCP) session establishment request or a PFCP session modification request to the user plane network element, wherein the PFCP session establishment request or the PFCP session modification request carries the target UE address of a PDU session.

19. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to execute the address conflict detection method according to any one of claims 1-5.

20. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to execute the address conflict detection method according to any one of claims 6-8.