WO2017162121A1

WO2017162121A1 - User plane serving gateway selection method and system

Info

Publication number: WO2017162121A1
Application number: PCT/CN2017/077314
Authority: WO
Inventors: 汪钱纯; 朱进磊; 刘西亮; 刘卫东
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-03-21
Filing date: 2017-03-20
Publication date: 2017-09-28
Also published as: CN107222899A

Abstract

Disclosed are a user plane serving gateway selection method and system. The method comprises: a mobility management entity obtains, during handover or tracking area update of a user terminal, current position information of the user terminal and sends same to a control plane serving gateway; the control plane serving gateway determines a target user plane serving gateway currently required by the user terminal according to the position information, and sends attribute information of the target user plane serving gateway to the mobility management entity; and the mobility management entity sends the attribute information of the user plane serving gateway to a base station to complete the handover or tracking area update.

Description

User plane service gateway selection method and system

Technical field

The present disclosure relates to the field of communications, for example, to a user plane service gateway selection method and system.

Background technique

The 3rd Generation Partnership Project (3GPP)'s next-generation mobile wireless network project is called System Architecture Evolution (SAE). The architecture of the SAE is shown in Figure 1. The SAE architecture includes the following network elements:

Evolved Residential Access Network (E-RAN), in which an evolved radio access network can provide higher uplink and downlink rates, lower transmission delay, and more reliable wireless transmission, E-RAN The network element included in the network is an Evolved NodeB (eNodeB), and the eNodeB provides radio resources for access of the terminal;

Home Subscriber Server (HSS), set to permanently store user subscription data;

A Mobility Management Entity (MME), configured as a control plane function entity, a server that temporarily stores user data, and is responsible for managing and storing user equipment (User Equipment, UE) contexts (such as UE identity, user identity, mobility management state). And the user security parameter, etc., assigning a temporary identifier to the user, and when the UE is camped in the tracking area or the network, is responsible for authenticating the user, processing all non-access stratum messages between the MME and the UE, and triggering SAE paging;

Service General Packet Radio Service (GPRS) Support Node (SGSN), set to support GPRS for Gb interface or Iu interface access, server for temporarily storing user data, responsible for managing and storing GPRS mobile GPRS Mobility Management (GMM) context and Packet Data Protocol (PDP) context, and processing all non-access stratum messages between the SGSN and the UE;

Serving Gateway (S-GW), where the serving gateway is a user plane entity, responsible for user plane data routing processing, and terminating downlink data of the UE in idle state. Manage and store the SAE bearer context of the UE, such as IP bearer service parameters and network internal routing information. The service gateway is an anchor point of the internal user plane of the 3GPP system, wherein one user can only have one at a time. S-GW;

a Packet Data Network Gateway (PDN-GW or P-GW) is configured as a gateway for the UE to access a Packet Data Network (PDN), and allocates an Internet Protocol (IP) address of the user. At the same time, it is a mobility anchor of 3GPP and non-3GPP access systems, wherein users can access multiple PDN-GWs at the same time;

The Policy and Charging Rule Functionality (PCRF) is configured to generate a Quality of Service (QOS) rule for controlling user data transmission according to the service information and the user subscription information and the configuration information of the operator. The fee rule can also control the establishment and release of bearers in the access network.

As demand grows, Evolved Packet System (EPS) gateways gradually generate some constraints. The user data stream processing is concentrated on the PDN egress gateway, which causes the gateway device to have complicated functions and poor scalability. The control plane of the gateway is highly coupled with the forwarding plane, which is not conducive to the smooth evolution of the core network. The frequency of the forwarding surface expansion is higher than that of the control plane. The tight coupling causes the control plane and the forwarding plane to expand synchronously. The short device update period leads to an increase in the composite cost. Network layer data forwarding is difficult to identify users and service features. It can only be forwarded according to the QoS delivered by the upper layer, resulting in low network resource utilization. It is difficult to finely control the data flow according to user and service characteristics. In addition, a large number of strategies require manual configuration, resulting in increased management complexity and high operating costs. Therefore, the control functions in the packet domain gateway need to be separated from the forwarding functions to meet the needs of network development and market applications.

2 is an architecture based on a separation of a control plane of a gateway (GW) and a user plane of a GW in a non-roaming scenario. The architecture splits the S-GW and the P-GW in the EPS architecture into two types of functional network elements: a Gateway Controller (GwC) and a Gateway User (GwU).

The GwC includes a control plane service gateway (SGwC) and a control plane packet data network gateway (PGwC), SGwC corresponds to the control plane of the S-GW, PGwC corresponds to the control plane of the P-GW, and GwC is responsible for load sharing, GwU selection, and IP. Address and tunnel identification assignments and policies and billing controls.

The GwU includes a user plane service gateway (SGwU) and a control plane packet data network gateway (PGwU). The SGwU corresponds to the user plane of the SGW, the PGwU corresponds to the user plane of the PGW, and the GwU is responsible for the user plane of the S-GW and the user plane of the P-GW. Function, the related functions include data stream identification and deep packet parsing, QoS processing and bearer binding, and buffering of downlink paging data.

The docked user plane interface corresponds to SGwC and PGwC, and the docked control plane interface corresponds to SGwU and PGwU.

Summary of the invention

The present disclosure provides a user plane service gateway selection method and system. When the user terminal is switched or the tracking area is updated after the service gateway control plane and the user plane function are separated, the user service gateway can be controlled according to the current user terminal delivered by the mobile management entity. The location information is re-determined by the user plane service gateway to ensure the correct establishment of the uplink and downlink data channels, to ensure the continuity of the service and the integrity of the data.

The present disclosure provides a user plane service gateway selection method, including:

The control plane serving gateway receives the current location information of the user terminal that is sent by the mobility management entity when the user terminal switches or the tracking area is updated;

Determining, by the control plane serving gateway, a target user plane serving gateway currently required by the user terminal according to the location information;

The control plane serving gateway sends the attribute information of the target user plane serving gateway to the mobility management entity.

In an embodiment, before the control plane serving gateway receives the current location information of the user terminal that is sent by the mobile management entity when the user terminal switches or tracks the area update, the method further includes:

The majority control plane serving gateway receives the current location information of the user terminal that is sent by the mobility management entity when the user terminal initiates an attach request;

The control plane serving gateway sends the determined attribute information of the target user plane serving gateway to the mobility management entity.

In an embodiment, the location information includes a current tracking area of the user terminal, and the control plane serving gateway locally presets a first correspondence table including a correspondence between the tracking area and the user plane serving gateway, or includes a location organization. Identifying a second correspondence table corresponding to the user plane service gateway;

Determining, by the control plane serving gateway, the target user plane service gateway currently required by the user terminal according to the location information includes:

Determining, by the control plane serving gateway, the use according to the tracking area and the first correspondence table The target user plane service gateway currently required by the user terminal;

Or the control plane serving gateway receives the target location organization identifier currently associated by the user terminal determined by the mobility management entity according to the tracking area and the locally preset third correspondence table, and organizes the identifier according to the target location and The second correspondence relationship table determines a target user plane service gateway that is currently required by the user terminal; and the third correspondence relationship table includes a correspondence relationship between the tracking area and the location organization identifier.

In an embodiment, the location information includes a location group identifier associated with a current tracking area of the user terminal, and the mapping relationship between the location organization identifier and the user plane service gateway is pre-configured on the control plane serving gateway. ;

The control plane serving gateway determines, according to the received location organization identifier and the correspondence relationship table, a target user plane serving gateway that is currently required by the user terminal.

In one embodiment, the attribute information includes an address of the user plane service gateway and a tunnel identity.

In an embodiment, the control plane serving gateway sends the determined attribute information of the target user plane serving gateway to the mobility management entity, where the control plane serving gateway creates a session response message or a modify bearer response message. And adding the attribute information of the target user plane service gateway, and sending the create session response message or the modify bearer response message to the mobility management entity.

The present disclosure also provides a user plane service gateway selection method, including:

The mobile management entity sends the current location information of the user terminal to the control plane serving gateway when the user terminal switches or tracks the area update;

Receiving, by the mobility management entity, attribute information of a target user plane serving gateway fed back by the control plane serving gateway, where the target user plane serving gateway is determined by the control plane serving gateway according to the location information;

The mobility management entity sends the attribute information of the target user plane serving gateway to the new base station.

In an embodiment, the method further includes: before the user terminal switches or tracks the area update, the method further includes:

When the user terminal initiates an attach request, the mobility management entity sends the current location information of the user terminal to the control plane serving gateway;

The mobility management entity sends attribute information of the target user plane serving gateway to the base station requested by the user terminal.

In an embodiment, the mobile management entity sends the current location information of the user terminal to the control plane serving gateway, including:

The mobility management entity adds the current location information of the user terminal to create a session request message or modify a bearer request message, and sends the create session request message or the modify bearer request message to the control plane serving gateway.

The present disclosure also provides a user plane service gateway selection system, including a mobility management entity and a control plane service gateway;

The mobility management entity is configured to send the current location information of the user terminal to the control plane serving gateway when the user terminal switches or the tracking area update, and receives the attribute information of the target user plane service gateway fed back by the control plane serving gateway. And transmitting attribute information of the target user plane service gateway to the base station requested by the user terminal;

The control plane service gateway is configured to receive the location information, determine, according to the location information, a target user plane serving gateway that is currently required by the user terminal, and send attribute information of the target user plane serving gateway to the Mobile management entity.

In an embodiment, the mobility management entity is further configured to send the current location information of the user terminal to the control plane when the user terminal initiates an attach request before the user terminal switches or tracks the area update. a service gateway, and receiving attribute information of the target user plane service gateway fed back by the control plane service gateway, and sending attribute information of the target user plane service gateway to the base station requested by the user terminal, the target user plane The service gateway is determined by the control plane serving gateway according to the location information;

The control plane serving gateway is further configured to receive, before receiving, the current location information of the user terminal that is sent by the mobility management entity when the user terminal initiates the handover or the tracking area update, and receive the mobility management entity to initiate the attachment at the user terminal. Determining the current location information of the user terminal sent by the request, determining, according to the location information, a target user plane serving gateway currently required by the user terminal, and The attribute information of the target user plane service gateway is sent to the mobility management entity. The present disclosure also provides a non-transitory computer readable storage medium storing computer executable instructions arranged to perform the above method.

The user plane service gateway selection method and system provided by the disclosure, the mobile management entity acquires the current location information of the user terminal and sends it to the control plane service gateway when the user terminal switches or tracks the area update; the control plane service gateway can be based on the location Determining the target user plane service gateway currently required by the user terminal, and sending the attribute information of the target user plane service gateway to the mobility management entity; the control plane serving gateway determines the current location of the user terminal according to the current location information of the user terminal. The required user plane service gateway, the mobility management entity sends the attribute information of the user plane service gateway to the base station to complete the handover or tracking area update. When the user terminal switches or the tracking area is updated, the control plane service gateway can perform the re-determination of the user plane service gateway according to the current location information of the user terminal delivered by the mobility management entity, thereby ensuring the correct establishment of the uplink and downlink data channels, and ensuring Business continuity and data integrity.

DRAWINGS

1 is a schematic diagram of an EPC architecture;

2 is a schematic structural diagram of separating a GW control plane from a user plane in a non-roaming scenario;

3 is a schematic flowchart of selecting a user plane service gateway in a user terminal handover or tracking area update in the first embodiment;

4 is a schematic flowchart of selecting a user plane service gateway in a process of attaching a user terminal in Embodiment 1;

5 is a schematic flowchart of selecting a user plane service gateway in a process of attaching a user terminal in Embodiment 2;

6 is a schematic flowchart of selecting a user plane service gateway in a tracking process of a user terminal in the second embodiment;

7 is a schematic flowchart of selecting a user plane service gateway in a handover process in a user terminal according to Embodiment 2;

8 is a schematic flowchart of selecting a user plane service gateway in a path switching process of a user terminal in Embodiment 2;

9 is a schematic structural diagram of hardware of an MME in an embodiment;

FIG. 10 is a schematic diagram showing the hardware structure of a control plane serving gateway in an embodiment.

detailed description

After the above GW control plane and the user plane are separated, many problems existing in the EPS gateway are solved, but new technical problems are also introduced. For example, the existing switching mechanism does not support correct and reliable transmission of data streams in some scenarios. In the existing mechanism, the MME performs the S-GW selection according to the user location and the subscription information. When the user location moves to initiate the handover and tracking area update procedure, the MME only determines whether the S-GW needs to be reselected, and performs S-GW selection and information update of the uplink and downlink data transmission paths. If it is determined that the S-GW needs to be reselected, the appropriate S-GW is reselected according to the updated location information and the subscription information, and the newly selected S-GW uplink user plane address and tunnel identifier are sent to the eNodeB. Update the uplink data transmission path information to ensure the correct transmission of the uplink data. The new eNodeB information, such as the eNodeB downlink user plane address and the tunnel identifier, is sent to the S-GW to update the downlink data transmission path information to ensure the correct transmission of the downlink data. If the reselection of the S-GW is not required, the information such as the current user plane address and the tunnel identifier of the current S-GW is sent to the new eNodeB, and the new eNodeB downlink user plane address and the tunnel identifier are transmitted to the current S-GW. Perform reconstruction of the uplink and downlink data channels.

After the S-GW control plane is separated from the user plane, the GW selection by the MME according to the relevant mechanism is the selection of the control plane serving gateway SGwC. According to the mechanism as described above, in the scenario where the SGwC does not need to be switched but the user plane service gateway SGwU is reselected, the data cannot be correctly forwarded. For example, the switching process based on the S1 interface. After the MME receives the handover request message of the original eNodeB, the MME does not need to change the SGwC, and the current SGwU address and the tunnel identifier are sent to the new eNodeB, but the new eNodeB does not necessarily obtain the final The SGwU address and the tunnel ID, because the SGwU may reselect in the subsequent process, the upstream and downstream data channel establishment errors will occur. After the uplink data arrives at the eNodeB, it will be transmitted to the old SGwU, which may result in failure to connect to the SGwU. It is discarded after the SGwU receives it, which causes the upload cannot be performed correctly. The continuity of the service and the integrity of the data cannot be guaranteed.

In the process of the user terminal switching or the middle zone update in this embodiment, the mobility management entity may obtain the current location information of the user terminal, and send the current location information to the control plane serving gateway, and the control plane service gateway may The location information determines the target user plane service gateway currently required by the user terminal, and sends the attribute information of the target user plane service gateway to the mobility management entity, and the mobility management entity sends the attribute information to the base station to complete the handover or tracking area update. . This embodiment switches at the user terminal or During the tracking area update process, the user plane service gateway can be re-determined according to the current location information of the user terminal, and the uplink and downlink data channels can be successfully established.

Embodiment 1

FIG. 3 is a method for selecting a user plane service gateway according to the embodiment.

In step 310, the Mobility Management Entity (MME) acquires the current location information of the user terminal and sends it to the control plane serving gateway when the user terminal switches or tracks the area update.

In step 320, the control plane serving gateway determines the target user plane serving gateway currently required by the user terminal according to the received location information.

In step 330, the control plane serving gateway sends the attribute information of the target user plane serving gateway to the MME.

In step 340, the MME sends the attribute information of the target user plane serving gateway to the base station for completing the handover or tracking area update. The base station obtains the attribute information of the correct user plane service gateway, and according to the attribute information, the subsequent uplink and downlink data channels are successfully established. The attribute information in this embodiment may include an address of the user plane service gateway and a tunnel identifier.

In this embodiment, during the user terminal handover or tracking area update process, the target user plane serving gateway may be determined for the user terminal according to the current location information of the user terminal. In the process of initiating the attachment of the user terminal, the target user plane service gateway required for the current attachment process may also be selected for the user terminal by using the location information of the user terminal, as shown in FIG. 4 .

In step 410, the MME obtains the current location information of the user terminal and sends it to the control plane serving gateway when the user terminal initiates the attach request.

In step 420, the control plane serving gateway receives the location information sent by the MME.

In step 430, the control plane serving gateway determines the target user plane serving gateway required for the current attachment process of the user terminal according to the location information.

In step 440, the control plane serving gateway sends the determined attribute information of the target user plane serving gateway to the MME.

In step 450, the MME sends the received attribute information of the target user plane serving gateway to the base station requested by the user terminal to complete the attach procedure.

In this embodiment, the location information of the user terminal that is acquired by the MME may include a current tracking area (TA) of the user terminal, and may also be based on a direct correspondence between the tracking area and the user plane service gateway, or according to the tracking area and the user. The indirect correspondence of the face service gateway determines the target user plane service gateway.

The mapping between the tracking area and the user plane service gateway determines that the target user plane service gateway can include:

A first correspondence table including a tracking area and a user plane service gateway is preset in the control plane service gateway, where the setting may be completed by the MME or by other network elements or devices;

After receiving the current location information of the user terminal, the control plane service gateway can obtain the current tracking area of the user terminal, and find the corresponding target user plane service gateway in the first correspondence table according to the tracking area.

Using the simple correspondence between the tracking area and the user plane service gateway, determining that the target user plane service gateway can include:

And a second correspondence table including a correspondence between the location organization identifier and the user plane service gateway, and a third correspondence table including a correspondence between the tracking area and the location organization identifier is preset in the mobility management entity, where The setting may also be completed by the MME or by other network elements or devices;

After receiving the current location information of the user terminal, the mobility management entity may obtain the current tracking area of the user terminal, and find the target location organization identifier currently associated with the user terminal in the third correspondence table according to the tracking area, and the target The location organization identifier is sent to the control plane service gateway;

The control plane service gateway finds the target user plane service gateway currently required by the user terminal in the second correspondence table according to the target location organization identifier.

In this embodiment, the location information of the user terminal that is acquired by the MME may be a location group identifier that is associated with the current tracking area of the user terminal, and may be preset on the control plane service gateway to include the location organization identifier and the user plane service gateway. The correspondence table of relationships. The location information sent by the MME to the control plane serving gateway is the location organization identifier associated with the current location (eg, TA) of the user terminal. The control plane serving gateway can determine the target user plane service gateway currently required by the user terminal in the corresponding relationship table according to the received location organization identifier.

In this embodiment, when the MME obtains the location organization identifier associated with the current location of the user terminal, the MME may also obtain a mapping relationship between the location of the user terminal (for example, the tracking area) and the location organization identifier, where the tracking area may be corresponding to a tracking area. A location organization identifier, or a plurality of tracking areas corresponding to a location organization identifier. The table may be configured on the MME, and the MME searches for the corresponding location group identifier according to the table and the current location of the user terminal. In some embodiments, it may also be set on the user terminal, and the user terminal searches for the location organization identifier and feeds back to the MME.

In this embodiment, the target user plane service gateway determined by the control plane serving gateway according to the terminal location information may be an old user plane service gateway or a new target user plane service gateway. In the case of an old user plane service gateway, since the MME already knows the address of the user plane serving gateway and the tunnel identifier, the attribute information fed back to the MME may only include the identification information identifying the user plane service network management, or may be The address and tunnel identifier are directly added to the attribute information fed back by the MME.

In this embodiment, when the MME sends the location information of the user terminal to the control plane serving gateway, the related protocol message may be utilized, for example, a session message is created, the location information may be added in the related protocol message, and the location information is added. The message is sent to the control plane service gateway, and an independent message may be added to send the location information separately on the basis of the relevant protocol. Correspondingly, when the control plane service gateway sends the attribute information of the target user plane service gateway to the MME, the attribute information may be added to the MME by using a message in the relevant protocol, or may be added independently on the basis of the relevant protocol. The message is sent separately to send the attribute information.

During the attaching process, the MME may add the current location information of the user terminal in the create session request message, and send the create session request message to the control plane serving gateway. The control plane service gateway may add the attribute information of the target user plane service gateway in the create session response message, and send a create session response message to the MME.

During the handover or tracking area update process, the MME may add the current location information of the user terminal to create a session request message or modify the bearer request message, and send a create session request message or a modify bearer request message to the control plane serving gateway. The control plane service gateway may add the attribute information of the target user plane service gateway in the create session response message or modify the bearer response message, and send a session response message or a modify bearer response message to the MME.

Embodiment 2

This embodiment explains the solution of the present disclosure in combination with application scenarios of user terminal attachment, handover, and tracking area update.

FIG. 5 is an example of a process in which a user attaches to an MME.

In step 510, the user terminal initiates an attach message to the network.

In step 520, the MME sends a create session request message to the control plane serving gateway SGwC, where the request message includes a location group identifier associated with the current location of the user terminal.

In step 530, the control plane serving gateway SGwC selects the target user plane serving gateway SGwU according to the location group identifier carried by the MME.

In step 540, the control plane serving gateway SGwC sends a create user plane request message to the target user plane serving gateway SGwU.

In step 550, the target user plane serving gateway SGwU replies to the control plane serving gateway SGwC to create a user plane response message.

In step 560, the control plane serving gateway SGwC sends a create session request message to the packet data network gateway.

In step 570, the packet data network gateway replies to the control plane serving gateway SGwC with a create session response message.

In step 580, the control plane serving gateway SGwC sends a create session response message to the mobility management entity, and the create session response message in step 580 includes attribute information of the target user plane serving gateway.

In step 590, additional process processing of the attachment is performed.

The other process may be a radio resource establishment process, an attach completion process, or the MME notifies the GW eNodeB tunnel information flow.

Figure 6 is an example of a tracking area update process for SGwU changes.

In step 610, the user initiates a tracking area update message to the network.

In step 620, the mobility management entity sends a create session request message or a modify bearer request message to the control plane serving gateway SGwC, where the message includes a location group identifier.

In step 630, the control plane serving gateway SGwC selects the target user plane serving gateway SGwU according to the location group identifier carried by the MME.

In step 640, the control plane serving gateway SGwC sends a create user plane request message to the target user plane serving gateway SGwU.

In step 650, the target user plane serving gateway SGwU replies to the control plane serving gateway SGwC with a create user plane response message.

In step 660, the control plane serving gateway SGwC sends a modify bearer request message to the packet data network gateway.

In step 670, the packet data network gateway replies to the control plane serving gateway SGwC with a modify bearer response message.

In step 680, the control plane serving gateway SGwC sends a create session response message or a modify bearer response message to the mobility management entity, where the message includes an attribute message of the target user plane serving gateway.

In step 690, the mobility management entity feeds back an attribute message to the new base station.

In step 6100, other process processing of the tracking area update, such as tracking area update receiving message and tracking area completion message processing, is performed.

Among them, other process processing of the tracking area update may be.

FIG. 7 is an example of a handover procedure for changing the SGwU of the SGwU.

In step 710, the radio access network element sends a handover request message.

In step 720, the mobility management entity sends a create session request message or a modify bearer request message to the control plane serving gateway SGwC, where the message includes a location group identifier.

In step 730, the control plane serving gateway SGwC selects the target user plane serving gateway SGwU according to the location group identifier carried by the MME.

In step 740, the control plane serving gateway SGwC sends a create user plane request message to the target user plane serving gateway SGwU.

In step 750, the target user plane serving gateway SGwU replies to the control plane serving gateway SGwC with a create user plane response message.

In step 760, the control plane serving gateway SGwC sends a create session response message or a modify bearer response message to the mobility management entity, where the message includes an attribute message of the target user plane serving gateway.

In step 770, the mobility management entity feeds back an attribute message to the new base station.

In step 780, other process processing of the handover is performed.

In step 790, the mobility management entity sends a modify bearer request to the control plane serving gateway SGwC. Message.

In step 7100, the control plane serving gateway SGwC sends a modify bearer request message to the packet data gateway.

In step 7110, the packet data gateway sends a Modify Bearer Response message to the Control Plane Serving Gateway SGwC.

In step 7120, the control plane serving gateway SGwC sends a modify bearer response message to the mobility management entity.

In step 7130, other flow processing of the handover, such as the old radio resource release processing, is performed.

FIG. 8 is an example of a path switching process of SGwU change.

In step 810, the radio access network element sends a path switch request message.

In step 820, the mobility management entity sends a create session request message or a modify bearer request message to the control plane serving gateway SGwC, where the message includes a location group identifier.

In step 830, the control plane serving gateway SGwC selects the target user plane serving gateway SGwU according to the location group identifier carried by the MME.

In step 840, the control plane serving gateway SGwC sends a create user plane request message to the target user plane serving gateway SGwU.

In step 850, the target user plane serving gateway SGwU replies to the control plane serving gateway SGwC with a create user plane response message.

In step 860, the control plane serving gateway SGwC sends a modify bearer request message to the packet data network gateway.

In step 870, the packet data network gateway replies to the control plane serving gateway SGwC with a modify bearer response message.

In step 880, the control plane serving gateway SGwC sends a create session response message or a modify bearer response message to the mobility management entity, where the message includes an attribute message of the target user plane serving gateway.

In step 890, the mobility management entity feeds back an attribute message to the new base station.

In step 8100, other process processing of path switching is performed.

An embodiment also provides a non-transitory computer readable storage medium storing a computer executable The instructions, the computer executable instructions are arranged to perform the method of any of the above embodiments.

An embodiment further provides a hardware structure diagram of an MME. Referring to FIG. 9, the MME includes:

At least one processor 90, which is exemplified by a processor 90 in FIG. 9; and a memory 91, may further include a communication interface 92 and a bus 93. The processor 90, the communication interface 92, and the memory 91 can complete communication with each other through the bus 93. Communication interface 92 can transmit information. The processor 90 can call the logic instructions in the memory 91 to perform the following methods:

When the user terminal switches or tracks the area update, the current location information of the user terminal is sent to the control plane serving gateway;

Receiving attribute information of the target user plane service gateway fed back by the control plane serving gateway, where the target user plane serving gateway is determined by the control plane serving gateway according to the location information;

And transmitting the attribute information of the target user plane serving gateway to the new base station.

In addition, the logic instructions in the memory 91 described above may be implemented in the form of a software functional unit and sold or used as a stand-alone product, and may be stored in a computer readable storage medium.

The memory 91 is a computer readable storage medium and can be used to store a software program, a computer executable program, such as a program instruction or a module corresponding to the method executed by the MME in the above embodiment. The processor 90 executes the function application and the data processing by executing a software program, an instruction or a module stored in the memory 91, that is, the method executed by the MME in the above method embodiment.

The memory 91 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to usage of the terminal device, and the like. Further, the memory 91 may include a high speed random access memory, and may also include a nonvolatile memory.

An embodiment further provides a hardware structure diagram of a control plane serving gateway. Referring to FIG. 10, the control plane service gateway includes:

At least one processor 100, which is exemplified by a processor 100 in FIG. 10; and a memory 101, may further include a communication interface 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 can complete communication with each other through the bus 103. Communication interface 102 can transmit information. The processor 100 can call the logic in the memory 101 Instructions to perform the following methods:

Receiving current location information of the user terminal that is sent by the mobility management entity when the user terminal switches or tracks the area update;

Determining, according to the location information, a target user plane service gateway currently required by the user terminal;

And transmitting attribute information of the target user plane service gateway to the mobility management entity.

In addition, the logic instructions in the memory 101 described above may be implemented in the form of a software functional unit and sold or used as a stand-alone product, and may be stored in a computer readable storage medium.

The memory 101 is a computer readable storage medium and can be used to store a software program, a computer executable program, such as a program instruction or a module corresponding to a method executed by a control plane service gateway in the above embodiment. The processor 100 executes a function application and data processing by executing a software program, an instruction or a module stored in the memory 101, that is, a method for implementing the control plane service gateway in the above method embodiment.

The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to usage of the terminal device, and the like. Further, the memory 101 may include a high speed random access memory, and may also include a nonvolatile memory.

The technical solution of the above embodiment may be embodied in the form of a software product stored in a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device) Etc.) Perform all or part of the steps of the method described in the above embodiments. The foregoing storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like. A medium that can store program code, or a transitory storage medium.

Industrial applicability

The method and system for selecting a user plane service gateway provided by the foregoing embodiment, when the user terminal switches or the tracking area is updated, can control the surface service gateway to perform the re-service of the user plane service gateway according to the current location information of the user terminal delivered by the mobile management entity. It is determined that the correct establishment of the uplink and downlink data channels can be ensured, and the continuity of the service and the integrity of the data are guaranteed.

Claims

A user plane service gateway selection method includes:

The control plane serving gateway receives the current location information of the user terminal that is sent by the mobility management entity when the user terminal switches or the tracking area is updated;

Determining, by the control plane serving gateway, a target user plane serving gateway currently required by the user terminal according to the location information;

The control plane serving gateway sends the attribute information of the target user plane serving gateway to the mobility management entity.
The method of claim 1, before the control plane serving gateway receives the current location information of the user terminal that is sent by the mobile management entity when the user terminal switches or tracks the area update, the method further includes:

The control plane serving gateway receives current location information of the user terminal that is sent by the mobility management entity when the user terminal initiates an attach request;

Determining, by the control plane serving gateway, a target user plane serving gateway currently required by the user terminal according to the location information;

The control plane serving gateway sends the determined attribute information of the target user plane serving gateway to the mobility management entity.
The method according to claim 1 or 2, wherein the location information includes a current tracking area of the user terminal, and the control plane serving gateway locally presets a first correspondence including a correspondence between the tracking area and the user plane serving gateway. a table, or a second correspondence table including a correspondence between the location organization identifier and the user plane service gateway;

Determining, by the control plane serving gateway, the target user plane service gateway currently required by the user terminal according to the location information includes:

Determining, by the control plane serving gateway, the use according to the tracking area and the first correspondence table The target user plane service gateway currently required by the user terminal;

Or the control plane serving gateway receives the target location organization identifier currently associated by the user terminal determined by the mobility management entity according to the tracking area and the locally preset third correspondence table, and organizes the identifier according to the target location and The second correspondence relationship table determines a target user plane service gateway that is currently required by the user terminal; and the third correspondence relationship table includes a correspondence relationship between the tracking area and the location organization identifier.
The method according to claim 1 or 2, wherein the location information includes a location group identifier associated with a current tracking area of the user terminal; and the control plane service gateway is pre-configured with a location organization identifier and a user plane service gateway. Correspondence table of correspondences;

Determining, by the control plane serving gateway, the target user plane service gateway currently required by the user terminal according to the location information includes:

The control plane serving gateway determines, according to the received location organization identifier and the correspondence relationship table, a target user plane serving gateway that is currently required by the user terminal.
The method of claim 1 or 2, wherein the attribute information comprises an address of a user plane service gateway and a tunnel identity.
The method according to claim 1 or 2, wherein the control plane serving gateway sends the determined attribute information of the target user plane serving gateway to the mobility management entity, including: the control plane serving gateway creates a session response message Or modifying the attribute information of the target user plane service gateway in the bearer response message, and sending the create session response message or the modify bearer response message to the mobility management entity.
A user plane service gateway selection method includes:

The mobile management entity sends the current location information of the user terminal to the control plane serving gateway when the user terminal switches or tracks the area update;

Receiving, by the mobility management entity, attribute information of a target user plane serving gateway fed back by the control plane serving gateway, where the target user plane serving gateway is the serving plane serving gateway according to the bit Set the information; and

The mobility management entity sends the attribute information of the target user plane serving gateway to the new base station.
The method of claim 7, wherein the method further comprises: before the user terminal switches or tracks the area update, the method further comprises:

When the user terminal initiates an attach request, the mobility management entity sends the current location information of the user terminal to the control plane serving gateway;

Receiving, by the mobility management entity, attribute information of a target user plane serving gateway fed back by the control plane serving gateway, where the target user plane serving gateway is determined by the control plane serving gateway according to the location information;

The mobility management entity sends attribute information of the target user plane serving gateway to the base station requested by the user terminal.
The method of claim 7 or 8, wherein the mobile management entity sends the current location information of the user terminal to the control plane serving gateway:

The mobility management entity adds the current location information of the user terminal to create a session request message or modify a bearer request message, and sends the create session request message or the modify bearer request message to the control plane serving gateway.
A user plane service gateway selection system, including a mobility management entity and a control plane service gateway; wherein

The mobility management entity is configured to send the current location information of the user terminal to the control plane serving gateway when the user terminal switches or the tracking area update, and receives the attribute information of the target user plane service gateway fed back by the control plane serving gateway. And transmitting attribute information of the target user plane service gateway to the base station requested by the user terminal;

The control plane serving gateway is configured to receive the location information, and determine, according to the location information Describe a target user plane service gateway currently required by the user terminal, and send attribute information of the target user plane service gateway to the mobility management entity.
The system according to claim 10, wherein said mobility management entity is further configured to: prior to said user terminal handover or tracking area update, said user terminal current location information when said user terminal initiates an attach request Sending to the control plane service gateway, receiving the attribute information of the target user plane service gateway fed back by the control plane service gateway, and sending the attribute information of the target user plane service gateway to the base station requested by the user terminal, The target user plane service gateway is determined by the control plane serving gateway according to the location information;

The control plane serving gateway is further configured to receive, before receiving, the current location information of the user terminal that is sent by the mobility management entity when the user terminal initiates the handover or the tracking area update, and receive the mobility management entity to initiate the attachment at the user terminal. Determining the current location information of the user terminal sent by the request, determining a target user plane serving gateway currently required by the user terminal according to the location information, and sending attribute information of the target user plane serving gateway to the mobile Manage entities.
A non-transitory computer readable storage medium storing computer executable instructions arranged to perform the method of any of claims 1-9.