WO2014183618A1

WO2014183618A1 - Ip stream switching method and device

Info

Publication number: WO2014183618A1
Application number: PCT/CN2014/077258
Authority: WO
Inventors: 邓强; 张娟; 周燕飞; 侯云静
Original assignee: 电信科学技术研究院
Priority date: 2013-05-13
Filing date: 2014-05-12
Publication date: 2014-11-20
Also published as: CN104159264A; CN104159264B

Abstract

Disclosed are an IP switching method and device for solving the problem of implementing the switching of part of an IP stream from an EPC-routed communication path to a neighboring communication path. Embodiments of the present application comprise: a first UE determines according to an ANDSF policy a preferred transmission path corresponding to a specific IP stream to be a neighboring communication path, and determines that the first UE and a second UE satisfy a condition for neighboring communication; a first UE switches the specific IP stream to a neighboring communication path of the first UE and the second UE, and transmits the specific IP stream by means of the neighboring communication path of the first UE and the second UE; the specific IP stream is a partial or complete IP stream transmitted between the first UE and the second UE. The switching of an IP stream from a core network routed communication path to a neighboring communication path is thereby achieved.

Description

Method and device for performing IP flow switching

The present application claims priority to Chinese Patent Application No. 201310175696.7, filed on Jan. 13, 2013, the entire disclosure of which is incorporated herein In this application.

Technical field

The present application relates to the field of communications technologies, and in particular, to a method and apparatus for performing IP (Internet Protocol) flow switching. Background technique

3GPP (The 3rd Generation Partnership) defines the requirements for SA (Service and System Aspects) of ProSe (Proximity Service) in TS 22.278, in the ProSe requirements of SA1. Two application scenarios, commercial and public safety, are specified, and ProSe requirements include ProSe discovery and ProSe communication.

The communication path between two UEs (User Equipments) defined by the EPC (EPC routed) is shown in Figure 1, where Figure 1 shows The communication path between UE1 and UE2 when both the SGW (Serving Gateway) and the Packet Data Network Gateway (PDN GW) of UE1 and UE2 are the same.

3 GPP is currently studying the proximity communication path between neighboring devices: one is the direct path between two UEs, see FIG. 2, in FIG. 2, UE1 and UE2 do not pass the EPC network. Direct communication; Second, the local routed path between the two UEs, as shown in FIG. 3, in FIG. 3, UE1 and UE2 communicate only through the eNB and not through the EPC network.

In order to support the UE to perform the access network discovery and selection function in a network environment in which multiple access networks coexist, the 3GPP defines an ADKSF (Access Network Discovery and Selection Function) entity, and the ANDSF entity The UE is provided with policies related to performing access network discovery and selection. When the UE is in the non-roaming state, the communication architecture between the AKDSF entity and the UE is shown in FIG. 4, where the UE interacts with the home AKDSF (Home-AKDSF, H-A DSF) entity through the S14 interface.

At present, the policies provided by the AKDSF entity to the UE mainly include: ISMP (Inter-system mobility policy), A DI (Access Network Discovery Information), and ISRP (Inter-System Routing Policy). Cross-system routing strategy). When the UE can use multiple radio interfaces at the same time, the UE uses ISRP to select the most suitable IP (Internet Protocol) flow (IP flow). Access technology and access network. The ISRP contains flow description information, and the IP flow matching the flow description information is a specific IP flow. There may be a pre-configured ISRP in the UE, and the ANDSF entity may update the ISRP in the UE under the trigger of the network or the request of the UE.

At present, 3GPP has studied in R12 that two user equipments with ProSe capability do not communicate directly through the EPC network. When two user equipments that originally communicated through the EPC network and have ProSe capabilities are found to be adjacent to each other, some IPs can be used. The flow is switched from the communication path routed via the EPC to the adjacent communication path to save resources of the EPC network.

In summary, there is currently no solution for the specific implementation of switching part of the IP flow from the communication path routed via the EPC to the adjacent communication path. Summary of the invention

The embodiment of the present application provides a method and apparatus for performing IP flow switching, which is used to solve a specific implementation problem of switching a partial IP flow from a communication path routed through an EPC to a neighboring communication path.

The embodiment of the present application provides a method for performing IP flow switching, including:

Determining, by the first user equipment, the preferred transmission path corresponding to the specific IP flow as the adjacent communication path according to the access network discovery and selection function ANDSF policy, and determining that the user and the second user equipment satisfy the proximity communication condition;

The first user equipment switches the specific IP flow to its neighboring communication path with the second user equipment, and transmits the specific IP flow by itself and the adjacent communication path of the second user equipment;

The specific IP flow is part or all of the IP flows transmitted between the first user equipment and the second user equipment. An embodiment of the present application provides an apparatus for performing IP flow switching, including:

a determining module, configured to determine, according to the ANDSF policy, a preferred transmission path corresponding to the specific IP flow as a neighboring communication path, and determine that the second user equipment meets the proximity communication condition;

a switching module, configured to switch the specific IP flow to a neighboring communication path of the second user equipment, and transmit the specific IP flow by using a neighboring communication path between the user and the second user equipment;

The specific IP flow is part or all of the IP flows transmitted between the first user equipment and the second user equipment. In the embodiment of the present application, the first user equipment determines, according to the ANDSF policy, that the preferred transmission path corresponding to the specific IP flow is the adjacent communication path, and determines that the second user equipment meets the proximity communication condition; the first user equipment uses the specific IP flow. Switching to the adjacent communication path of the second user equipment and transmitting the specific IP flow by itself and the adjacent communication path of the second user equipment, thereby realizing the communication path of the IP flow routed through the core network and the adjacent communication path Switch between. DRAWINGS

1 is a schematic diagram of a communication path routed via an EPC in the background art;

2 is a schematic diagram of a first proximity communication path in the background art;

3 is a schematic diagram of a second proximity communication path in the background art;

4 is a schematic diagram of a communication architecture between an A DSF entity and a UE in the background art;

FIG. 5 is a schematic diagram of a method for performing IP flow switching according to an embodiment of the present application;

6 is a schematic diagram of a flow of an IP flow provided by the present application from a communication path routed through an EPC to a neighboring communication path;

FIG. 7 is a schematic structural diagram of an apparatus for performing IP flow switching according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another apparatus for performing IP flow switching according to an embodiment of the present disclosure. detailed description

In this embodiment, the first user equipment determines, according to the ANDSF policy, that the preferred transmission path corresponding to the specific IP flow is the adjacent communication path, and determines that the second user equipment meets the proximity communication condition; and switches the specific IP flow to itself. The second user equipment is adjacent to the communication path, and transmits the specific IP stream through its own adjacent communication path with the second user equipment, thereby implementing switching of the IP flow between the communication path routed through the core network and the adjacent communication path.

The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

Referring to FIG. 5, an embodiment of the present application provides a method for performing IP flow switching, including the following steps: Step 51: A first user equipment determines, according to an ANDSF policy, that a preferred transmission path corresponding to a specific IP flow is a neighboring communication path. And determining that the second user equipment meets the proximity communication condition;

Step 52: The first user equipment switches the specific IP flow to its neighboring communication path with the second user equipment, and transmits the specific IP flow by itself and the adjacent communication path of the second user equipment.

In this embodiment, the specific IP flow is part or all of the IP flows transmitted between the first user equipment and the second user equipment, and the second user equipment is a different user equipment than the first user equipment. specific:

If the ANDSF policy is ISMP, the specific IP flow is all IP flows currently transmitted by the first user equipment; if the ANDSF policy is ISRP, the specific IP flow is in the IP flow currently transmitted by the first user equipment and in the ANDSF policy. Contains all IP flows that match the flow description information.

In the embodiment of the present application, the access technology corresponding to the specific IP flow may be an access technology included in the Access Technology of the child node of the Prioritized Access (Priority Access) node in the ISMP, or may be a RoutingRule in the ISRP ( Routing rules) Access to the nodes included in the AccessTechnology (Access Technology) Technology.

In an implementation, when the first user equipment performs step 51, the following methods may be used:

Method A: The first user equipment first determines, according to the ANDSF policy, whether the preferred transmission path corresponding to the specific IP flow is a neighboring communication path, and then determines whether the second user equipment meets the proximity communication condition; or

Mode B: The first user equipment first determines whether the second user equipment meets the proximity communication condition, and then determines, according to the ANDSF policy, whether the preferred transmission path corresponding to the specific IP flow is a neighboring communication path.

In an implementation, the first user equipment may obtain an ANDSF policy from an ANDSF server (ANDSF Server), or the ANDSF policy is configured in the first user equipment.

In an implementation, in step 51, the first user equipment determines that the preferred transmission path corresponding to the specific IP stream is the adjacent communication path, and the:

If the access technology corresponding to the specific IP flow in the ANDSF policy supports the use of the adjacent communication path to transmit the specific IP flow, and the adjacent communication path has a higher priority than the communication path other than itself (such as the tradition via the core network) The communication path), the first user equipment determines that the preferred transmission path corresponding to the specific IP flow is the adjacent communication path.

Further, if the access technology corresponding to the specific IP flow in the ANDSF policy does not support the use of the adjacent communication path to transmit the specific IP flow, or the access technology supports the use of the adjacent communication path to transmit the specific IP flow and the priority of the adjacent communication path. Below any other communication path other than itself (such as a traditional communication path via the core network), the first user equipment determines that the preferred transmission path corresponding to the particular IP flow is not a neighboring communication path.

It should be noted that, in the embodiment of the present application, the ANDSF policy is extended, and the ANDSF policy includes whether the corresponding access technology supports the use of the adjacent communication path for a specific IP flow, and if supported, further includes the adjacent communication path. The priority with the traditional communication path via the core network.

In an implementation, the first user equipment determines that the second user equipment meets the proximity communication condition, and the method includes: if the first user equipment and the second user equipment have established a proximity communication path, the first user equipment determines the self and the second user equipment. Meet adjacent communication conditions; or,

If the first user equipment and the second user equipment do not establish a proximity communication path, the first user equipment and the second user equipment both have the proximity service capability, and the distance between the first user equipment and the second user equipment meets the set condition. Then the first user equipment determines that it and the second user equipment satisfy the proximity communication condition.

Specifically, the first user equipment having the proximity service capability means that the first user equipment subscribes to the proximity communication service, and the network has authorized the first user equipment to use the proximity communication service; the second user equipment has the proximity service capability, The second user equipment subscribes to the proximity communication service, and the network has authorized the second user equipment to use the proximity communication service.

The distance between the first user equipment and the second user equipment satisfies the setting conditions including but not limited to the following conditions One or more:

The distance between the first user equipment and the second user equipment is not greater than a set threshold; the first user equipment and the second user equipment reside in the same cell; the first user equipment and the second user equipment reside in the same base station.

Further, if a proximity communication path is established between the first user equipment and the second user equipment, the first user equipment switches the specific IP flow to the established adjacent communication path for transmission.

Correspondingly, the second user equipment also switches the specific IP flow to the established adjacent communication path for transmission. Further, if the proximity communication path is not established between the first user equipment and the second user equipment, the first user equipment initiates a process of establishing a proximity communication path between itself and the second user equipment, and switches the specific IP flow to The adjacent communication path is transmitted.

Correspondingly, the second user equipment also switches the specific IP flow to the adjacent communication path for transmission.

In an implementation, after the first user equipment switches the specific IP flow to the neighboring communication path of the second user equipment, the method further includes:

The first user equipment sends indication information to its corresponding core network device (such as PGW (PDN GW, Packet Data Gateway)), and the indication information is used to indicate that it currently uses a neighboring communication path to transmit a specific IP stream.

Correspondingly, after receiving the indication information sent by the first user equipment, the core network device deletes, according to the indication information, the bearer corresponding to the specific IP flow from the context information of the first user equipment, or stops using the specific IP flow corresponding to the And carrying the transmission data; and the core network device releases the resource corresponding to the specific IP flow from the context information of the first user equipment.

It should be noted that the processing performed by the second user equipment is similar to the processing performed by the first user equipment, and details are not described herein again.

Preferably, if the first user equipment and the second user equipment correspond to the same core network device (like a PGW), the following two methods may be used to notify the core network device:

Manner 1: After the first user equipment and the second user equipment complete the handover of the specific IP flow to the adjacent communication path between the first user equipment and the second user equipment, the first user equipment or the second user equipment corresponds to itself. The core network device instructs the first user device and the second user device to currently transmit a specific IP flow using the adjacent communication path;

In this manner, if the first user equipment notifies the core network device, the first user equipment needs to know whether the second user equipment has switched the specific IP flow to the adjacent communication path between itself and the second user equipment; The second user equipment notifies the core network device, and the second user equipment needs to know whether the first user equipment has switched the specific IP flow to the adjacent communication path between itself and the first user equipment.

Manner 2: After the first user equipment completes switching the specific IP flow to the adjacent communication path between itself and the second user equipment, the first network device indicates to itself and the second user equipment currently uses the adjacent communication path to transmit the special And determining, after the second user equipment completes switching the specific IP flow to the adjacent communication path between itself and the first user equipment, indicating to the corresponding core network device that the user equipment and the first user equipment are currently using the adjacent communication path for transmission; Specific IP flow.

The method for performing IP flow switching provided by the embodiment of the present application will be described below with reference to specific embodiments.

As shown in FIG. 6, the application scenario of this embodiment is that UE1 and UE2 are currently communicating through a communication path routed through the EPC, and according to the indication of the ANDSF policy, the currently transmitted specific IP flow needs to be switched to the adjacent communication path. (ProSe path), the handover process of this embodiment includes:

Step 601: UE1 and UE2 communicate through an EPC network, if QQ communication is being used;

Step 602: UE1 obtains a corresponding A DSF policy by using an A DSF entity (such as an A DSF server), where the A DSF policy indicates that, for a specific IP flow, such as an IP flow corresponding to the specified application, the application specified in this embodiment is QQ, The priority of the ProSe path is higher than the priority of the communication path routed via the EPC;

Step 603: The UE1 obtains a corresponding AKDSF policy by using an AKDSF entity, where the AKDSF policy indicates that the priority of the ProSe path is higher than the priority of the communication path routed through the EPC for the specific IP flow;

Step 604: UE1 and UE2 find that they are adjacent to each other, and decide to use the proximity communication service, and switch the IP flow corresponding to the QQ to the ProSe path according to the AKDSF policy;

Step 605: The ProSe path is used for communication between the UE1 and the UE2, and the IP address of the peer end is used as the destination address.

Step 606: The UE1 indicates to the PGW that the IP stream corresponding to its own QQ is no longer routed via the EPC through the Binding Update message.

Step 607: After receiving the Binding Update message, the PGW returns a Binding Acknowledgement message to the UE1. At this time, the PGW does not send the downlink data of the IP flow corresponding to the QQ application to the UE1. Step 608: UE2 passes the Binding The Update message indicates to the PGW that the IP stream corresponding to its own QQ is no longer routed via the EPC;

Step 609: After receiving the Binding Update message, the PGW returns a Binding Acknowledgement message to the UE2. At this time, the PGW does not send the downlink data of the IP flow corresponding to the QQ application to the UE2.

In this embodiment, UE1 and UE2 correspond to the same PGW.

Step 610: The network side device performs a release process of related resources of the IP flow corresponding to the QQ application of the UE1 on the 3GPP network side.

In this step, E-UTRAN (Evolved UMTS Terrestrial Radio Access Network, Universal Mobile Telecommunications System, UMTS), PGW, HSS (Home Subscriber Server) AAA ( Authentication, Authorization And accounting, authentication, authorization, and accounting), interaction between network side devices such as the PCRF (Policy Control and Charging Rules Function);

Step 611: The network side device performs a release process of the related resources of the IP flow corresponding to the QQ application of the UE2 on the 3GPP network side.

In this step, EUTRAN (EUTRAN, Evolved UMTS Terrestrial Radio Access Network, UMTS, Universal Mobile Telecommunication System, Universal Mobile Telecommunications System), PGW, HSS (Home Subscriber Server, Home Subscriber Server) / AAA Interaction between network side devices such as PCRF.

The above method processing flow can be implemented by a software program, which can be stored in a storage medium shield, and when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, an apparatus for performing IP flow switching is also provided in the embodiment of the present application. Since the principle of solving the problem is similar to the method for performing IP flow switching, the implementation of the apparatus may refer to the implementation of the method. The repetitions are not repeated here.

Referring to FIG. 7, the apparatus for performing IP flow switching provided by the embodiment of the present application includes:

The determining module 71 is configured to determine, according to the ANDSF policy, that the preferred transmission path corresponding to the specific IP flow is a neighboring communication path, and determine that the second user equipment meets the proximity communication condition;

The switching module 72 is configured to switch a specific IP flow to a neighboring communication path of the second user equipment, and transmit a specific IP flow by using a proximity communication path between the user and the second user equipment;

The specific IP flow is part or all of the IP flows transmitted between the first user equipment and the second user equipment.

In an implementation, the determining module 71 is specifically configured to:

First, according to the ANDSF policy, determining whether the preferred transmission path corresponding to the specific IP flow is a neighboring communication path, and determining whether the self-neighboring device and the second user equipment satisfy the proximity communication condition;

Alternatively, it is first determined whether the second user equipment satisfies the proximity communication condition, and then determines, according to the A DSF policy, whether the preferred transmission path corresponding to the specific IP flow is a neighboring communication path.

In an implementation, the determining module 71 determines, according to the following steps, that the preferred transmission path corresponding to the specific IP flow is an adjacent communication path:

If an access technology corresponding to a specific IP flow in the ANDSF policy supports transmission of a specific IP flow using a neighboring communication path, and the priority of the adjacent communication path is higher than other communication paths except itself, determining a preferred corresponding to the specific IP flow The transmission path is an adjacent communication path.

In an implementation, the determining module 71 determines that the user and the second user equipment meet the proximity communication condition according to the following steps: if the neighboring communication path is established by the user equipment and the second user equipment, determining that the user equipment and the second user equipment meet the proximity communication Letter condition

If the neighboring communication path is not established between the user and the second user equipment, and the second user equipment has the proximity service capability, and the distance between the user equipment and the second user equipment meets the set condition, it is determined that the user equipment and the second user equipment are satisfied. Proximity to communication conditions.

The distance between the first user equipment and the second user equipment satisfies the setting conditions including but not limited to one or more of the following conditions:

In implementation, the switching module 72 is also used to:

After the specific IP flow is switched to the neighboring communication path of the second user equipment, the indication information is used to indicate that the current IP stream is currently transmitted by the neighboring communication path.

Preferably, each functional module of the device for performing IP flow switching in the embodiment of the present application is integrated in a device for communicating (such as a first user device and a second user device that perform communication).

As shown in FIG. 8 , an apparatus for performing IP flow switching according to an embodiment of the present application includes: a processor 800, configured to determine, according to an ANDSF policy, a preferred transmission path corresponding to a specific IP flow as a proximity communication path, and determine Respectively satisfying the proximity communication condition with the second user equipment; switching the specific IP flow to the adjacent communication path of the second user equipment, and transmitting the specific IP flow by using the transceiver 810 by itself and the adjacent communication path of the second user equipment ;

a transceiver 810, configured to receive and transmit data under the control of the processor 800;

The specific IP flow is part or all of the IP flows transmitted between the first user equipment and the second user equipment. In implementation, the processor 800 is specifically configured to:

In an implementation, the processor 800 determines, according to the following steps, that the preferred transmission path corresponding to the specific IP flow is the adjacent communication path: If an access technology corresponding to a specific IP flow in the ANDSF policy supports transmission of a specific IP flow using a neighboring communication path, and the priority of the adjacent communication path is higher than other communication paths except itself, determining a preferred corresponding to the specific IP flow The transmission path is an adjacent communication path.

In an implementation, the processor 800 determines that it satisfies the proximity communication condition with the second user equipment according to the following steps: if the neighboring communication path is established by itself and the second user equipment, determining that the user equipment and the second user equipment satisfy the proximity communication condition;

In implementation, processor 800 is also used to:

Here, in FIG. 8, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 800 and various circuits of memory represented by memory 880. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 810 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices over the transport interface. The processor 800 is responsible for managing the bus architecture and the usual processing, and the memory 880 can store the data used by the processor 800 in performing the operations.

The processor 800 is responsible for managing the bus architecture and general processing, and the memory 880 can store data used by the processor 800 in performing operations. Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the application can be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the application can be in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the present application has been described, those skilled in the art can make additional changes and modifications to the embodiments once they are aware of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application are within the scope of the appended claims and their equivalents,

Claims

Rights request

1. A method for Internet Protocol IP flow switching, characterized in that the method includes:

The first user equipment determines that the preferred transmission path corresponding to the specific IP flow is the proximity communication path according to the access network discovery and selection function ANDSF policy, and determines that it and the second user equipment meet the proximity communication conditions;

The first user equipment switches the specific IP flow to the adjacent communication path between itself and the second user equipment, and transmits the specific IP flow through the adjacent communication path between itself and the second user equipment;

Wherein, the specific IP flow is part or all of the IP flow transmitted between the first user equipment and the second user equipment.

2. The method of claim 1, wherein the first user equipment determines that the preferred transmission path corresponding to the specific IP flow is the adjacent communication path according to the access network discovery and selection function ANDSF policy, and determines that the first user equipment is connected to the adjacent communication path. The second user equipment meets the proximity communication conditions, including:

The first user equipment first determines whether the preferred transmission path corresponding to the specific IP flow is a proximity communication path according to the ANDSF policy, and then determines whether it and the second user equipment meet proximity communication conditions;

Alternatively, the first user equipment first determines whether it and the second user equipment meet proximity communication conditions, and then determines whether the preferred transmission path corresponding to the specific IP flow is a proximity communication path according to the ANDSF policy.

3. The method of claim 1, wherein the first user equipment determines that the preferred transmission path corresponding to the specific IP flow is a neighboring communication path according to the ANDSF policy, including:

If the ANDSF policy indicates that the access technology corresponding to the specific IP flow supports the use of adjacent communication paths to transmit the specific IP flow, and the priority of the adjacent communication paths is higher than other communication paths except itself, then the The first user equipment determines that the preferred transmission path corresponding to the specific IP flow is a neighboring communication path.

4. The method of claim 1, wherein the first user equipment determines that it and the second user equipment meet proximity communication conditions, including:

If the first user equipment and the second user equipment have established a proximity communication path, the first user equipment determines that it and the second user equipment meet proximity communication conditions;

If the first user equipment and the second user equipment do not establish a proximity communication path, both the first user equipment and the second user equipment have proximity service capabilities, and the first user equipment and the third user equipment If the distance between the two user equipments satisfies the set condition, then the first user equipment determines that it and the second user equipment meet the proximity communication conditions.

5. The method according to any one of claims 1 to 4, characterized in that, after the first user equipment switches the specific IP flow to the adjacent communication path between itself and the second user equipment, the Methods also include:

The first user equipment sends indication information to its corresponding core network equipment, where the indication information is used to indicate that it currently uses the adjacent communication path to transmit the specific IP flow.

6. The method of claim 5, characterized in that,

The core network device deletes the bearer corresponding to the specific IP flow from the context information of the first user equipment according to the received instruction information, or stops using the bearer corresponding to the specific IP flow to transmit data;

The core network device releases the resources corresponding to the specific IP flow from the context information of the first user equipment.

7. A device for switching Internet Protocol IP streams, characterized in that the device includes:

Determining module, configured to determine the preferred transmission path corresponding to the specific IP flow as the proximity communication path according to the access network discovery and selection function ANDSF policy, and determine that itself and the second user equipment meet the proximity communication conditions;

A switching module, configured to switch the specific IP flow to the adjacent communication path between itself and the second user equipment, and transmit the specific IP flow through the adjacent communication path between itself and the second user equipment;

8. The device according to claim 7, characterized in that the determining module is specifically used to:

First determine whether the preferred transmission path corresponding to the specific IP flow is a proximity communication path according to the ANDSF policy, and then determine whether itself and the second user equipment meet proximity communication conditions;

Or, first determine whether the user equipment and the second user equipment meet the proximity communication conditions, and then determine whether the preferred transmission path corresponding to the specific IP flow is a proximity communication path according to the ANDSF policy.

9. The device according to claim 7, wherein the determination module is specifically configured to determine that the preferred transmission path corresponding to the specific IP flow is a neighboring communication path according to the following steps:

If the ANDSF policy indicates that the access technology corresponding to the specific IP flow supports the use of adjacent communication paths to transmit the specific IP flow, and the priority of the adjacent communication paths is higher than other communication paths except itself, then determine the The preferred transmission path corresponding to the specific IP flow is a neighboring communication path.

10. The device according to claim 7, wherein the determination module is specifically configured to determine that the device and the second user equipment satisfy proximity communication conditions according to the following steps:

If the proximity communication path has been established between itself and the second user equipment, it is determined that the proximity communication conditions between itself and the second user equipment are met;

If no proximity communication path has been established between itself and the second user equipment, both itself and the second user equipment have proximity service capabilities, and the distance between itself and the second user equipment meets the set conditions, then determine that itself Proximity communication conditions are met with the second user equipment.

11. The device according to any one of claims 7 to 10, wherein the switching module is further configured to: after switching the specific IP flow to the adjacent communication path between itself and the second user equipment , sending indication information to its corresponding core network device, where the indication information is used to indicate that it is currently using the adjacent communication path to transmit the Specific IP flow.

12. A device for switching Internet Protocol IP streams, characterized in that the device includes:

The processor is configured to determine that the preferred transmission path corresponding to the specific IP flow is the proximity communication path according to the access network discovery and selection function ANDSF policy, and determine that it and the second user equipment meet the proximity communication conditions, and switch the specific IP flow. to the adjacent communication path between itself and the second user equipment, and adopt a transceiver to transmit the specific IP flow through the adjacent communication path between itself and the second user equipment;

a transceiver for transmitting and receiving data under the control of said processor;

13. The device according to claim 12, wherein the processor is specifically used to:

14. The device according to claim 12, wherein the processor is specifically configured to determine that the preferred transmission path corresponding to the specific IP flow is a neighboring communication path according to the following steps:

15. The device according to claim 12, wherein the determination module is specifically configured to determine that the device and the second user equipment satisfy proximity communication conditions according to the following steps:

16. The device according to any one of claims 12 to 15, wherein the switching module is further configured to: after switching the specific IP flow to the adjacent communication path between itself and the second user equipment , sending indication information to its corresponding core network device, where the indication information is used to indicate that it currently uses the adjacent communication path to transmit the specific IP flow.