CN102448046A - A data routing optimization method, device and system - Google Patents

Abstract

The present invention discloses a data routing optimization method, device and system, which are used to solve the data routing circuitous problem that exists after the UE moves to the inside of the visited PDN network when the UE remotely accesses the PDN network through the mobile communication network. The data routing optimization method comprises: receiving a request message initiated after the UE moves; after receiving the request message, confirming that the PDN connection between the UE and the visited PDN network needs to be route optimized, and confirming that the APN of the PDN connection allows the establishment of a LIPA connection according to the UE's contract information, controlling the type of the PDN connection to be optimized to a LIPA connection.

Description

A data routing optimization method, device and system

technical field

The invention relates to the field of mobile communication, in particular to a data routing optimization method, device and system.

Background technique

In the prior art, UE (User Equipment, user equipment) is located in the application scenario outside the accessed PDN (Public Data Network, public data network) network, and generally accesses the PDN through the core network in the mobile communication network by means of remote access. IP devices or application services inside the network.

However, when the UE moves from the outside of the PDN network to the inside of the PDN network, the data route will be connected to the core network in the mobile communication network through the base station equipment inside the PDN network, and then connected to the inside of the PDN network through the core network in the mobile communication network IP devices or application services, so as to realize access to PDN network resources.

It can be seen that in the prior art, when the UE is remotely accessed through the mobile communication network, there is a data routing problem after the UE moves inside the visited PDN network.

Contents of the invention

The invention discloses a data routing optimization method, equipment and system, which are used to solve the routing circuitous problem existing after UE moves to the inside of the visited PDN network when remotely accessing a PDN network through a mobile communication network.

An embodiment of the present invention provides a data routing optimization method, including:

receiving a request message initiated after the user equipment UE moves;

After receiving the request message, confirm that the PDN connection between the UE and the visited public data network PDN network needs to be route optimized, and confirm that the access point name APN of the PDN connection allows the establishment of a local When the Internet Protocol accesses the LIPA connection, the control optimizes the type of the PDN connection to the LIPA connection.

An embodiment of the present invention provides a data routing optimization device, including:

a receiving unit, configured to receive a request message initiated after the user equipment UE moves;

An optimization unit, configured to, after receiving the request message, confirm that the PDN connection between the UE and the visited public data network PDN network needs to be route optimized, and confirm the access of the PDN connection according to the subscription information of the UE The Point Name APN allows to control the optimization of the type of the PDN connection to a LIPA connection when establishing a Local Internet Protocol Access LIPA connection.

An embodiment of the present invention provides a data routing optimization system, including:

a triggering device, configured to initiate a request message after the user equipment UE moves;

A data routing optimization device, configured to receive a request message initiated by the trigger device; confirm that the PDN connection between the UE and the visited public data network PDN network needs to be route optimized, and confirm the PDN connection according to the subscription information of the UE The Access Point Name APN controls to optimize the type of the PDN connection to a LIPA connection when a Local Internet Protocol Access LIPA connection is allowed to be established.

In the data routing optimization method, device and system provided by the embodiments of the present invention, when the UE remotely accesses the PDN network through the mobile communication network, if the UE moves to the inside of the visited PDN network, the UE or the source base station device will initiate a request message. The PDN connection between the UE and the visited PDN network needs to be route optimized, and the APN of the PDN connection allows the establishment of a LIPA connection, and the type of the PDN connection is optimized as a LIPA connection. Since LIPA is an access method that directly accesses the PDN network without going through the core network in the mobile communication network, data routing is optimized, and the problem of UE moving from the outside of the visited PDN network to the inside of the visited PDN network is effectively solved. The problem of roundabout data routing.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

Figure 1 is a schematic diagram of data routing for UE remote access to the visited PDN network before and after movement in the RIAP scenario;

Fig. 2 is the implementation flow chart of the data routing optimization method in the embodiment of the present invention;

FIG. 3 is a schematic diagram of a possible structure of a data routing optimization device in an embodiment of the present invention;

FIG. 4 is a flow chart of implementing data routing optimization when a service request is initiated after the UE moves in an idle state in an embodiment of the present invention;

Fig. 5 is a flow chart of implementing data routing optimization when a handover request is initiated after the UE moves in a connected state in an embodiment of the present invention.

Detailed ways

In order to solve the data routing detour problem that exists after the UE moves into the visited PDN network when the UE remotely accesses the PDN network through the mobile communication network, the embodiment of the present invention provides a data routing optimization method and device, which detects the movement of the UE Afterwards, whether the target PDN network when the request message is initiated is a PDN network accessed through the core network in the mobile communication network, and judge whether the UE has moved to the inside of the visited PDN network, thereby avoiding that after the UE moves to the inside of the PDN network, through The core network is connected to the PDN network in a detour to realize data routing optimization.

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention, and in the absence of conflict, the present invention The embodiments and the features in the embodiments can be combined with each other.

Firstly, a typical application scenario of the embodiment of the present invention is introduced. Wherein, the mobile communication network is described by taking an LTE (Long Term Evolution, long-term evolution system) network and the PDN network by taking an enterprise or a home local area network as examples.

As shown in Figure 1, the core network of the LTE network includes MME (Mobile Management Entity, mobility management entity), SGW (Serving Gateway, serving gateway) and PGW (PDN Gateway, public data network gateway). The enterprise or home LAN includes multiple HeNBs (Home Evolved Node B), and the enterprise or home LAN deploys an L-GW (Local PDN Gateway, local gateway) that can be combined with the HeNB or set independently, so that the UE can directly Access network resources of the enterprise or home LAN.

When the UE is outside the enterprise or home LAN, data routing is usually directly connected to the L-GW through the SGW in the core network, and the network resources of the enterprise or home LAN are accessed through the L-GW. The data routing is shown in the dotted line. However, when the UE moves from the outside of the enterprise or home LAN to the inside of the enterprise or home LAN, the data route will be connected to the SGW in the core network through the HeNB inside the enterprise or home LAN, and then access the enterprise or home LAN through the L-GW. For network resources, please refer to the solid line for data routing. It can be seen that there is a data routing circuitous problem. In the embodiment of the present invention, the access mode of accessing PDN network resources through the local gateway deployed in the visited PDN network is called RIPA (Remote IP Access, remote IP access). IP devices or application services inside the home LAN.

In order to optimize data routing and reduce the burden on the core network, the embodiment of the present invention provides a corresponding data routing optimization method, as shown in Figure 2, including the following steps:

S201. The data routing optimization device receives a request message initiated after the UE moves;

S202. After receiving the request message, the data routing optimization device confirms that the PDN connection between the UE and the visited PDN network needs to be route optimized, and confirms the APN (Access Point Name, access point) of the PDN connection according to the subscription information of the UE Name) allows the establishment of a LIPA (Local IP Access, local IP access; IP: Internet Protocol, Internet Protocol) connection, the control optimizes the type of the PDN connection to a LIPA connection;

It should be noted that LIPA refers to an access method that directly accesses the PDN network without going through the core network in the mobile communication network; according to the existing agreement, the HSS (Home Subscriber Server, Home Subscriber Server) stores the UE's subscription Information, including CSG ID, APN and corresponding LIPA license information, etc., when the UE accesses the mobile communication network, the HSS sends its subscription information to the MME/SGSN in the core network.

In specific implementation, the type identifier used to identify the type of PDN connection can also be stored in the data routing optimization device; after the type of PDN connection is optimized as LIPA connection, the data routing optimization device will modify the type identifier stored for the PDN connection to A LIPA identifier, where the LIPA identifier is used to indicate that the type of the PDN connection is a LIPA connection.

The data routing optimization in the embodiment of the present invention can be applied to various mobile communication networks, such as LTE network, UMTS (Universal Mobile Telecommunications System, universal mobile communication system) network and the like. In the LTE network, the data routing optimization device specifically refers to the MME; in the UMTS network, the data routing optimization device specifically refers to the SGSN (Service GPRS Support Node, serving GPRS support node; GPRS: General Packet Radio Service ). Those skilled in the art know that the SGSN in the UMTS network has both the functions of the MME and the SGW in the LTE network. The data routing optimization method provided by the embodiment of the present invention is not only applicable to the application scenario where the type of PDN connection is the above-mentioned RIPA connection, but also applicable to the application scenario where the type of PDN connection is other remote access connections, such as through a gateway device in the core network A traditional access method for remotely accessing PDN network resources.

In a specific implementation, the request message may be the following specific signaling message:

1) After the UE in the connected state moves, the Handover Required (handover request) initiated by the source base station equipment accessed by the UE;

In a UMTS network, the source base station device may specifically be a NodeB (Node B is a macro base station), or an HNB (a Home Node B is a home base station); in an LTE network, the source base station device may specifically be The eNodeB (evolved Node B, macro base station) may also be a HeNB.

2) After the UE in the idle state moves, the Service Request (service request) initiated by the UE.

3) In the LTE network, after the UE in the idle state moves, the UE initiates the Tracking Area Update procedure (tracking area update procedure); in the UMTS network, after the UE in the idle state moves, the UE initiates the Routing Area Update procedure (routing area update process).

In a specific implementation, after receiving the request message, the data routing optimization device may confirm that the PDN connection between the UE and the visited PDN network needs to be route optimized in the following manner, which will be introduced separately:

Method 1: Judging based on the address information of the local gateway

This method is applicable to the application scenario where the type of PDN connection is RIPA connection. If the local gateway and the base station equipment in the PDN network are configured together, the target base station equipment will carry the address information of the corresponding local gateway (usually an IP address) when sending a request message to the Data routing optimization equipment. The data routing optimization device judges whether the address information of the local gateway is consistent with the gateway address of the PDN connection stored by itself; if they are consistent, it confirms that the PDN connection between the UE and the visited PDN network needs to be route optimized. In the LTE network, the local gateway may be called L-GW; in the UMTS network, the local gateway may be called L-GGSN (Local Gateway GPRS Support Node, gateway GPRS support node).

Method 2: Trigger the judgment of the local gateway selection process

This method is applicable to the application scenario where the type of PDN connection is RIPA connection. The data routing optimization device can use the local gateway selection mechanism to select a local gateway in the current area according to the request message, and determine the address information of the selected local gateway and the address information stored by itself. Whether the gateway addresses of the PDN connection are consistent; if they are consistent, it is confirmed that the PDN connection between the UE and the visited PDN network needs to perform route optimization.

Method 3: Judging by location information

This method is applicable to application scenarios where the type of PDN connection is RIPA connection and other remote access connections. If the target base station equipment currently accessed by the UE is a home base station, the request message carries the CSG ID (Closed Subscriber Group Identifier, closed subscriber group identifier); the data routing optimization device judges whether each CSG ID of the visited PDN network corresponding to the PDN connection includes the CSG ID of the current access cell carried in the request message; if included, Then it is confirmed that the PDN connection between the UE and the visited PDN network needs to be route optimized.

For the above three methods, after confirming that the PDN connection between the UE and the visited PDN network needs to be route optimized, since the subscription information of the UE includes LIPA permission information, the LIPA permission information identifies the LIPA allowed by the APN of the PDN connection. Connection type; further, the LIPA connection type allowed by the APN of the PDN connection may be obtained from the subscription information of the UE; based on the obtained LIPA connection type, it is confirmed that the APN of the PDN connection allows the establishment of a LIPA connection.

In a specific implementation, after the data routing optimization device receives the request message, it can simultaneously confirm that the PDN connection between the UE and the visited PDN network needs to be route optimized and that the APN of the PDN connection allows the establishment of a LIPA connection in the following manner. The applicable PDN connection type is RIPA connection and other remote access connection application scenarios, which are introduced as follows:

According to the subscription information of the UE, determine whether the APN list corresponding to the CSG ID of the currently accessed cell that allows the establishment of a LIPA connection includes the APN of the PDN connection; if so, confirm that the PDN connection between the UE and the visited PDN network requires Route optimization is performed, and the APN connected to the PDN allows the establishment of a LIPA connection.

In a specific implementation, the data routing optimization device controls to optimize the type of the PDN connection to a LIPA connection by issuing a routing optimization identifier to the target base station device currently accessed by the UE. When the target base station device currently accessed by the UE is combined with the local gateway, the route optimization identifier issued by the data routing optimization device to the target base station device currently accessed by the UE includes the connection between the local gateway connected to the PDN and the data route optimization device. Tunnel identifier of the S5 tunnel; when the target base station currently accessed by the UE and the local gateway accessed by the target base station are set independently, the route optimization identifier issued by the data routing optimization device to the target base station device currently accessed by the UE includes : the tunnel identifier of the relevant tunnel (such as the S5 tunnel) between the local gateway connected to the PDN and the data routing optimization device and the address information of the local gateway.

Based on the same inventive concept, the embodiment of the present invention also provides a data routing optimization device and system. Since the problem solving principle of the device and system is similar to the data routing optimization method, the implementation of the device and system can be found in the implementation of the method , the repetitions will not be repeated. In the LTE network, the data routing optimization device specifically refers to the MME; in the UMTS network, the data routing optimization device specifically refers to the SGSN.

As shown in FIG. 3, a possible structural diagram of a data routing optimization device provided by an embodiment of the present invention includes:

The receiving unit 301 is configured to receive a request message initiated after the UE moves;

The optimization unit 302 is configured to, after receiving the request message, confirm that the PDN connection between the UE and the visited PDN network needs to be route optimized, and when confirming that the APN of the PDN connection allows the establishment of the LIPA connection according to the subscription information of the UE, control the PDN The connection type is optimized for LIPA connection.

Specifically, the optimization unit 302 may include:

The first judging subunit 3021 is configured to judge whether the PDN connection needs to be route optimized, and output the judging result;

The second judging subunit 3022 is configured to judge whether the APN connected to the PDN is allowed to establish a LIPA connection when the judging result output by the first judging subunit 3021 is yes, and output the judging result;

The executing subunit 3023 is configured to, when the judgment result output by the second judging subunit 3022 is yes, control to optimize the type of the PDN connection to a LIPA connection.

Specifically, the first judging subunit 3021 is specifically configured to: if the type of the PDN connection is a RIPA connection that accesses PDN network resources through a local gateway deployed in the visited PDN network, according to the information sent by the target base station device currently accessed by the UE The address information of the local gateway; judging whether the address information of the local gateway is consistent with the gateway address of the PDN connection stored in itself; if consistent, the output judgment result is yes;

or,

The first judging subunit 3021 is specifically used to select a local gateway in the current area if the type of the PDN connection is a RIPA connection that accesses PDN network resources through a local gateway deployed in the visited PDN network; judge the selected local gateway Whether the address information of the PDN is consistent with the gateway address of the PDN connection stored by itself; if they are consistent, the output judgment result is yes;

or,

The first judging subunit 3021 is specifically configured to judge whether each CSG ID of the visited PDN network corresponding to the PDN connection includes the CSG ID of the currently accessed cell carried in the request message, if the target base station currently accessed by the UE is For the home base station, the request message carries the CSGID of the currently accessed cell; if it is included, the output judgment result is yes.

Specifically, the executing subunit 3023 is specifically configured to, when the judgment result output by the second judging subunit 3022 is yes, control the connection of the PDN connection by issuing a route optimization identifier to the target base station device currently accessed by the UE. Type optimized for LIPA connections.

In specific implementation, the data routing optimization device may also include:

a storage unit 303, configured to store a type identifier used to identify the type of the PDN connection; and

The update unit 304 is used to modify the type identifier stored for the PDN connection to a LIPA identifier after the type of the PDN connection is optimized as a LIPA connection, and the LIPA identifier is used to indicate that the type of the PDN connection is a LIPA connection.

The embodiment of the present invention also provides a data routing optimization system, including a trigger device and a data routing optimization device, the trigger device can be the UE itself, or a source base station device accessed by the UE; the data routing optimization device can be an LTE network The MME can also be the SGSN in the UMTS network. in:

a triggering device, configured to initiate a request message after the user equipment UE moves;

A data routing optimization device, configured to receive a request message initiated by the trigger device; confirm that the PDN connection between the UE and the visited public data network PDN network needs to be route optimized, and confirm the PDN connection according to the subscription information of the UE The Access Point Name APN controls to optimize the type of the PDN connection to a LIPA connection when a Local Internet Protocol Access LIPA connection is allowed to be established.

In order to better understand the embodiments of the present invention, the specific embodiments of the present invention will be described below through examples.

In the embodiment of the present invention, the PDN network includes an enterprise or a home LAN, and the data routing optimization equipment involved includes an MME in an LTE network, an SGSN in a UMTS network, etc., and the target base station equipment in the PDN network can be a home base station or a home base station. macro base station. The embodiments of the present invention are applicable to an application scenario where a UE remotely accesses a PDN network through a mobile communication network and moves from outside the visited PDN network to inside the visited PDN network. The remote access method includes but is not limited to RIPA. In the PDN network involved in the embodiment of the present invention, the base station equipment and the local gateway can be set together or independently.

For ease of description, the following uses the RIPA application scenario in the LTE network as an example to describe the routing optimization method provided by the embodiment of the present invention. The data routing optimization device involved is specifically an MME; assuming that the PDN network is an enterprise or home local area network, the corresponding The base station device is HeNB, and the local gateway is L-GW.

Among them, the first embodiment describes the implementation process of the data routing optimization method when the UE initiates a service request after the UE moves in the idle state, and the second embodiment describes the handover initiated by the source base station device after the UE moves in the connected state The implementation process of the routing optimization method at the request time.

Embodiment one

After the UE moves in the idle state, for example, from the outside of the visited enterprise or home LAN to the inside of the visited enterprise or home LAN, the UE initiates a Service Request (service request) to the MME, and the MME triggers data routing optimization according to the Service Request, such as As shown in Figure 4, it includes the following steps:

S401. The UE initiates a Service Request to the MME through the target HeNB (home base station), and the Service Request carries the CSG ID of the currently accessed cell;

S402, the MME judges whether the PDN connection between the UE and the visited enterprise or home LAN needs to be route optimized, and if so, executes S403; if not, continues to execute according to the subsequent process of the existing UE initiating a service request;

S403. Perform authentication according to the subscription information of the UE, and judge whether the APN of the current PDN connection is allowed to establish a LIPA connection, if yes, execute S404, otherwise, continue to execute according to the subsequent process of the existing UE initiating a service request;

S404. The MME modifies the type identifier of the PDN connection to a LIPA identifier, and the LIPA identifier is used to indicate that the type of the PDN connection is a LIPA connection;

In the specific implementation, the MME stores a type identifier for each PDN connection, indicating the type of the corresponding PDN connection, including LIPA, SIPTO (Selected IP Traffic Offload, selective traffic offload), RIPA and CN (operators' Core Network, to the operator business core network traffic).

S405. The MME carries the routing optimization identifier to the target HeNB in the S1-MME related signaling with the target HeNB. The S1-MME related signaling can specifically be: Initial Context SetupRequest;

The routing optimization identification includes: the tunnel identifier of the S5 tunnel between the L-GW and the SGW and the address information of the L-GW, where the address information of the L-GW is optional, and when the L-GW and the target HeNB are combined and set -The address information of the GW can be omitted.

S406. Establish a direct tunnel between the target HeNB and the L-GW, thereby completing route optimization;

Specifically, the target HeNB learns that the PDN connection requires route optimization according to the route optimization identifier issued by the MME, and then establishes a direct tunnel DTunnel with the L-GW according to the address information of the L-GW in the route optimization identifier.

It should be noted that step S406 is performed when the target HeNB and the L-GW are set independently, and this step does not need to be performed if the HeNB and the L-GW are set together.

Specifically, the establishment method of DTunnel may include the following steps:

According to the obtained address information of the L-GW, the HeNB sends a Modify BearerRequest to the L-GW, which carries the following information: the address information of the target HeNB, and the tunnel identifier (downlink D- TEID) and the tunnel identifier (L-GW S5TEID) of the S5 tunnel corresponding to the directly connected tunnel.

After receiving the Modify Bearer Request, the L-GW returns a Modify BearerResponse to the target HeNB, which carries the following information: the tunnel identifier (uplink D-TEID) allocated for DTunnel for uplink data transmission;

So far, the DTunnel between the target HeNB and the L-GW can be established according to the above information.

After the routing optimization is completed, the follow-up process of the Service Request is completed according to the existing technology.

The implementation of data routing optimization when the UE performs location update after moving in the idle state is similar to the implementation of data routing optimization when the UE initiates a service request after moving in the idle state, so details will not be repeated here. Among them, the location update request initiated by the UE after moving in the idle state is called TAU (Tracking Area Update procedure, tracking area update procedure) in the LTE network, and RAU (Routing Area Update procedure, routing area update procedure) in the UMTS network district update process).

Embodiment two

After the UE moves in the connected state, such as moving from outside the visited enterprise or home LAN to inside the visited enterprise or home LAN, the source base station equipment that the UE accesses, such as HeNB, initiates a Handover Required (handover request) to the MME, and the MME according to the Handover Required triggers data routing optimization, as shown in Figure 5, including the following steps:

S501. The source HeNB accessed by the UE initiates a Handover Required to the MME, and the Handover Required carries the CSG ID of the currently accessed cell;

S502. The MME judges whether routing optimization needs to be performed on the PDN connection between the UE and the visited enterprise or home LAN, and if so, executes S503; if not, proceeds according to the subsequent procedure of the existing UE initiating a service request;

S503. Perform authentication according to the subscription information of the UE, and judge whether the APN of the current PDN connection is allowed to establish a LIPA connection, if yes, execute S504, otherwise, continue to execute according to the subsequent process of the existing UE initiating a service request;

S504. The MME modifies the type identifier of the PDN connection to a LIPA identifier, where the LIPA identifier is used to indicate that the type of the PDN connection is a LIPA connection;

In the specific implementation, MME stores a type identifier for each PDN connection, indicating the type of the corresponding PDN connection, including LIPA, SIPTO (Selected IP Traffic Offload, selective traffic offload), PIPA and CN (operators' Core Network, to the operator business core network traffic).

S505. The MME carries the routing optimization identifier to the HeNB in the S1-MME related signaling with the target HeNB. The S1-MME related signaling can specifically be: Handover Request;

The route optimization identification includes: the tunnel identifier of the S5 tunnel between the L-GW and the SGW and the address information of the L-GW, where the address information of the L-GW is optional, and in the case of a combination of the L-GW and the HeNB, the L- The address information of the GW can be omitted.

S506. Establish a direct tunnel between the target HeNB and the L-GW, thereby completing route optimization;

Specifically, the target HeNB learns that the PDN connection requires route optimization according to the route optimization identifier issued by the MME, and then establishes a direct tunnel DTunnel with the L-GW according to the address information of the L-GW in the route optimization identifier.

It should be noted that step S506 is performed when the target HeNB and the L-GW are set independently, and if the target HeNB and the L-GW are set together, this step does not need to be performed.

Specifically, the establishment method of DTunnel may include the following steps:

The target HeNB sends a Create Session Request to the L-GW according to the obtained address information of the L-GW, which carries the following information: the address information of the target HeNB, the tunnel identifier (downlink D -TEID) and the tunnel identifier (L-GW S5TEID) of the S5 tunnel corresponding to the direct tunnel.

After receiving the Create Session Request, the L-GW returns a Create SessionResponse to the target HeNB, which carries the following information: the tunnel identifier (uplink D-TEID) allocated for the DTunnel for uplink data transmission;

So far, the DTunnel between the target HeNB and the L-GW can be established according to the above information.

After the routing optimization is completed, the follow-up process of the Service Request is completed according to the existing technology.

Embodiment 1 and Embodiment 2 respectively describe the specific implementation process of data routing optimization when the UE initiates a service request after moving in an idle state and initiates a handover request after moving in a connected state. After the data routing optimization is completed, when the UE accesses the network resources of the enterprise or home LAN, the local routing optimization of LIPA is performed, and the data is directly distributed at the local gateway without going through the SGW of the core network. The uplink and downlink data are processed according to the optimized local route. transmission.

In the data routing optimization method and device provided by the embodiments of the present invention, when the UE remotely accesses the PDN network through the mobile communication network, if the UE moves inside the visited PDN network, the data routing optimization device will receive the request message, and if it is determined that the UE The PDN connection with the visited PDN network needs to be route optimized, and the APN of the PDN connection allows the establishment of a LIPA connection, and the type of the PDN connection is optimized as a LIPA connection. Since LIPA is an access method that directly accesses the PDN network through the core network in the mobile communication network, data routing is optimized, and the problem that exists when the UE moves from the outside of the visited PDN network to the inside of the visited PDN network is effectively solved. Data routing circuitous problem.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (16)

1. A method for optimizing a data route, comprising:

receiving a request message initiated after the user equipment UE moves;

and after receiving the request message, when confirming that PDN connection between the UE and the accessed public data network PDN needs to be subjected to route optimization and confirming that an access point name APN of the PDN connection allows a local Internet protocol access LIPA connection to be established according to subscription information of the UE, controlling the type of the PDN connection to be optimized into the LIPA connection.

2. The method of claim 1, wherein the step of confirming that the PDN connection between the UE and the visited PDN network requires route optimization comprises:

if the PDN connection type is RIPA connection of PDN network resources accessed through a local gateway deployed in an accessed PDN, judging whether the address information of the local gateway is consistent with a gateway address of the PDN connection stored by the local gateway according to the address information of the local gateway sent by target base station equipment currently accessed by the UE;

and if so, confirming that the PDN connection between the UE and the visited PDN network needs to be subjected to route optimization.

3. The method of claim 1, wherein the step of confirming that the PDN connection between the UE and the visited PDN network requires route optimization comprises:

if the PDN connection type is the RIPA connection of PDN network resources accessed through a local gateway deployed in an accessed PDN network, selecting a local gateway in a current area;

judging whether the address information of the selected local gateway is consistent with the gateway address of the PDN connection stored by the local gateway;

and if so, confirming that the PDN connection between the UE and the visited PDN network needs to be subjected to route optimization.

4. The method of claim 1, wherein if the target base station device currently accessed by the UE is a home base station, the request message carries a Closed Subscriber Group Identity (CSGID) of a currently accessed cell; and

confirming that PDN connection between the UE and the visited PDN network needs to be subjected to route optimization, specifically comprising:

judging whether each CSG ID of the accessed PDN network corresponding to the PDN connection comprises the CSG ID of the current access cell carried in the request message;

and if so, confirming that the PDN connection between the UE and the visited PDN network needs to be subjected to route optimization.

5. The method of claim 2, 3 or 4, wherein LIPA permission information is included in the subscription information of the UE, the LIPA permission information identifying an APN allowed LIPA connection type for a PDN connection; and

the step of confirming that the access point name APN connected with the PDN allows establishing a local internet protocol access LIPA connection according to subscription information of the UE specifically includes:

obtaining the LIPA connection type allowed by the APN of the PDN connection from the subscription information of the UE;

and confirming that the APN of the PDN connection allows to establish the LIPA connection based on the obtained LIPA connection type.

6. The method of claim 1, wherein if the target base station device currently accessed by the UE is a home base station, the request message carries a Closed Subscriber Group Identity (CSGID) of a currently accessed cell;

the determining that the PDN connection between the UE and the visited public data network PDN network needs to be route optimized, and determining that the APN of the PDN connection allows LIPA connection establishment according to subscription information of the UE, specifically includes:

judging whether an APN (access point name) list which is corresponding to a CSG (closed subscriber group) ID (identity) of a current access cell and allows to establish LIPA (local IP access) connection comprises the APN of the PDN connection or not according to subscription information of the UE;

and if so, confirming that the PDN connection between the UE and the visited public data network PDN network needs to be subjected to route optimization, and the APN of the PDN connection allows to establish the LIPA connection.

7. The method of claim 1, wherein the type of PDN connection is optimized to a LIPA connection by issuing a route optimization identity control to a target base station device currently accessed by the UE.

8. The method of claim 1, wherein a type identifier for identifying a type of PDN connection is stored in advance; and

the method further comprises the following steps:

after the type of the PDN connection is optimized to be the LIPA connection, the type identification stored in the PDN connection is modified to be the LIPA identification, and the LIPA identification is used for indicating that the type of the PDN connection is the LIPA connection.

9. The method of any of claims 1 to 8, wherein the request message comprises: after the UE in the connection state moves, a Handover request Handover Required initiated by source base station equipment accessed by the UE; or after the UE in the idle state moves, the UE initiates a Service Request; or, after the UE in the idle state moves, the Tracking Area Update procedure initiated by the UE is Tracking Area Update procedure or Routing Area Update procedure.

10. A data route optimization device, comprising:

a receiving unit, configured to receive a request message initiated after a user equipment UE moves;

and the optimization unit is used for controlling the type of the PDN connection to be optimized into the LIPA connection when the PDN connection between the UE and the accessed public data network PDN needs to be subjected to route optimization and the access point name APN of the PDN connection is confirmed to allow the establishment of the local Internet protocol access LIPA connection according to the subscription information of the UE after the request message is received.

11. The apparatus according to claim 10, wherein the optimization unit specifically includes:

a first judging subunit, configured to judge whether the PDN connection needs to be route optimized, and output a judgment result;

a second judging subunit, configured to, when the judgment result output by the first judging subunit is yes, judge whether the APN of the PDN connection allows LIPA connection to be established, and output a judgment result;

and an execution subunit, configured to, when the determination result output by the second determination subunit is yes, control to optimize the type of the PDN connection to the LIPA connection.

12. The apparatus of claim 11,

the first determining subunit is specifically configured to, if the type of the PDN connection is an RIPA connection that accesses PDN network resources through a local gateway deployed in an accessed PDN network, send, according to address information of the local gateway, which is sent by a target base station device to which the UE currently accesses; judging whether the address information of the local gateway is consistent with the gateway address of the PDN connection stored by the local gateway; if the two are consistent, outputting a judgment result of yes;

or,

the first determining subunit is specifically configured to select a local gateway in a current area if the PDN connection type is an RIPA connection that accesses PDN network resources through a local gateway deployed in an accessed PDN network; judging whether the address information of the selected local gateway is consistent with the gateway address of the PDN connection stored by the local gateway; if the two are consistent, outputting a judgment result of yes;

or,

the first determining subunit is specifically configured to determine whether each closed subscriber group identity CSG ID of the visited PDN network corresponding to the PDN connection includes the CSG ID of the current access cell carried in the request message, and if the target base station device currently accessed by the UE is a home base station, the request message carries the CSG ID of the current access cell; if yes, the judgment result is output as yes.

13. The apparatus of claim 10, further comprising:

the executing subunit is specifically configured to, when the determination result output by the second determining subunit is yes, optimize the type of the PDN connection to the LIPA connection by issuing a route optimization identifier control to a target base station device currently accessed by the UE.

14. The apparatus of claim 10, further comprising:

a storage unit configured to store a type identifier for identifying a type of the PDN connection; and

and the updating unit is used for modifying the type identifier stored for the PDN connection into a LIPA identifier after the type of the PDN connection is optimized to the LIPA connection, and the LIPA identifier is used for indicating that the type of the PDN connection is the LIPA connection.

15. A data routing optimization system, comprising:

the trigger equipment is used for initiating a request message after the user equipment UE moves;

the data route optimization equipment is used for receiving the request message initiated by the trigger equipment; and when confirming that the PDN connection between the UE and the accessed public data network PDN needs to be subjected to route optimization and confirming that an access point name APN of the PDN connection allows a local Internet protocol access LIPA connection to be established according to subscription information of the UE, controlling the type of the PDN connection to be optimized into the LIPA connection.

16. The system of claim 15,

the triggering device is the user equipment UE itself or source base station equipment accessed by the UE;

the data route optimization equipment is a mobility management entity MME in a LTE network of a long term evolution system or a serving GPRS support node SGSN in a UMTS network of a universal mobile telecommunications system.

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