WO2016090922A1

WO2016090922A1 - Lipa/sipto connection establishment method and device

Info

Publication number: WO2016090922A1
Application number: PCT/CN2015/084729
Authority: WO
Inventors: 徐雯; 郑芳庭
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-11
Filing date: 2015-07-21
Publication date: 2016-06-16
Also published as: CN104703293A; CN104703293B

Abstract

Disclosed are an LIPA/SIPTO connection establishment method and device. The method comprises: an MME receives LIPA/SIPTO identification information sent by a base station; acquire a public data network (PDN) connection of a terminal corresponding to the base station when it is determined, according to the LIPA/SIPTO identification information, that the base station supports an LIPA/SIPTO function; acquire subscription information of the terminal corresponding to the PDN connection; release the PDN connection corresponding to the terminal when it is determined, according to the subscription information, that the terminal supports the LIPA/SIPTO function; and after the PDN connection is released, establish an LIPA/SIPTO connection with a local gateway (LGW) if the terminal again initiates a PDN connection request. The present invention solves the technical problem that a common PDN connection cannot be updated to an LIPA/SIPTO connection in real time.

Description

Method and device for establishing LIPA/SIPTO connection

Technical field

The present invention relates to the field of communications, and in particular, to a local IP access (LIPA) LIPA/Selected IP Traffic Offload (SIPTO) connection establishment method and apparatus.

Background technique

With the rapid development of the mobile Internet, new services and applications bring more rich experiences to users. At the same time, the increase in the number of users and the increase in user data transmission rates have placed higher demands on the network element performance of the core network. The LIPA and SIPTO technologies were originally proposed based on HeNB (Home enhanced NodeB). LIPA and SIPTO technologies are enhancements to the HeNB function. User data transmission can be directly implemented by the HeNB. It is not required to be transmitted to the carrier's core network. The services are directly offloaded from the HeNB, thus reducing the data transmission delay and reducing the data. With the load and transmission costs of the core network, operators can maximize the limited resources of the core network, provide better services for valuable services, and greatly improve the user experience.

From the perspective of network architecture, LIPA is used for HeNB, and SIPTO can be used for HeNB, and also for macro network. In terms of function and structure, the problems of LIPA and SIPTO@LN (SIPTO over the Local Network) are similar, and the network architecture is basically the same. In the LIPA and SIPTO@LN connection technology, the LGW (Local Gateway) replaces the PGW, and the LGW is integrated with the HeNB to implement the user service flow data directly from the H(e)NB, without going through the core network. Packet Data Network Gateway (P-GW).

In the existing LIPA/SIPTO technology, if the HeNB dynamically increases the LIPA/SIPTO capability, the LIPA/SIPTO connection can be initiated after the normal packet data network (PDN) connection has been created. The normal PDN connection that has been created cannot be updated to the LIPA/SIPTO connection in real time. The continuous online feature of the LTE (Long Term Evolution) network makes the established bearer unable to fully utilize the offload resources brought by LIPA.

Summary of the invention

The embodiment of the invention provides a method and a device for establishing a LIPA/SIPTO connection, so as to at least solve the technical problem that the normal PDN connection cannot be updated to the LIPA/SIPTO connection in real time.

According to an aspect of an embodiment of the present invention, a method for establishing a LIPA/SIPTO connection is provided, including:

The mobile management entity MME receives the LIPA/SIPTO identification information sent by the base station, where the LIPA/SIPTO identification information is used to indicate that the base station supports the LIPA/SIPTO function;

Obtaining, when the base station supports the LIPA/SIPTO function according to the LIPA/SIPTO identification information, acquiring a public data network PDN connection of the base station corresponding terminal;

Obtaining subscription information of the terminal corresponding to the PDN connection, where the subscription information indicates that the terminal supports the LIPA/SIPTO function;

Determining, when the terminal supports the LIPA/SIPTO function according to the subscription information, releasing a PDN connection corresponding to the terminal;

After releasing the PDN connection, if the terminal re-initiates the PDN connection request, establish a LIPA/SIPTO connection with the local gateway LGW.

In the embodiment of the present invention, the MME receiving the LIPA/SIPO identity information sent by the base station includes:

Receiving a configuration update message sent by the base station, where the configuration update message carries the LIPA/SIPTO identification information; or

Receiving an evolved radio access bearer ERAB modification indication message sent by the base station, where the ERAB modification indication message carries the LIPA/SIPTO identification information.

In the embodiment of the present invention, releasing the PDN connection corresponding to the terminal includes:

Initiate a bearer deactivation process; or initiate a detach process.

In the embodiment of the present invention, before the releasing the PDN connection corresponding to the terminal, the method further includes:

Obtaining the locally configured LIPA/SIPTO connection priority information; or obtaining the LIPA/SIPTO connection priority information according to the subscription information of the terminal;

Release the PDN connection corresponding to the terminal, including:

And triggering release of the PDN connection corresponding to the terminal according to the LIPA/SIPTO connection priority information.

In the embodiment of the present invention, the base station includes a primary base station and a secondary base station, and the MME receives the LIPA/SIPTO identification information sent by the base station, including:

After receiving the LIPA/SIPTO identification information sent by the secondary base station, the primary base station receives LIPA/SIPTO identification information sent by the primary base station, where the LIPA/SIPTO identification information is used to indicate that the secondary base station supports LIPA/SIPTO function;

When determining, according to the LIPA/SIPTO identification information, that the base station supports the LIPA/SIPTO function, acquiring the PDN connection corresponding to the base station includes:

And determining, according to the LIPA/SIPTO identification information, that the slave base station under the primary base station supports the LIPA/SIPTO function, acquiring a PDN connection of the corresponding terminal of the primary base station.

According to another aspect of the present invention, a device for establishing a local IP access LIPA/select IP traffic offload SIPTO connection is further provided, which is applied to an MME, and the device includes:

a receiving module, configured to receive LIPA/SIPTO identification information sent by the base station, where the LIPA/SIPTO identification information is used to indicate that the base station supports the LIPA/SIPTO function;

An acquiring module, configured to: when determining, according to the LIPA/SIPTO identification information received by the receiving module, that the base station supports the LIPA/SIPTO function, acquiring a public data network PDN connection of the base station corresponding terminal, and acquiring the PDN connection The subscription information of the corresponding terminal, wherein the subscription information indicates that the terminal supports the LIPA/SIPTO function;

a processing module, configured to release a PDN connection corresponding to the terminal when the terminal supports the LIPA/SIPTO function according to the subscription information acquired by the acquiring module;

The connection module is configured to establish a LIPA/SIPTO connection with the LGW if the terminal re-initiates the PDN connection request after the processing module releases the PDN connection.

In the embodiment of the present invention, the receiving module is configured to receive a configuration update message sent by the base station, where the configuration update message carries the LIPA/SIPTO identification information, and receives an evolved wireless sent by the base station. The access bearer ERAB modification indication message, where the ERAB modification indication message carries the LIPA/SIPTO identification information.

In the embodiment of the present invention, the processing module is configured to initiate a bearer deactivation process and initiate a detach process.

In the embodiment of the present invention, the acquiring module is further configured to: obtain the locally configured LIPA/SIPTO connection priority information before the processing module releases the PDN connection corresponding to the terminal; or, according to the subscription information of the terminal Obtaining the LIPA/SIPTO connection priority information;

The processing module is configured to trigger release of the PDN connection corresponding to the terminal according to the LIPA/SIPTO connection priority information.

In the embodiment of the present invention, the receiving module is configured to: after the base station includes the primary base station and the secondary base station, after receiving, by the primary base station, the LIPA/SIPTO identification information sent by the secondary base station, receiving the primary LIPA/SIPTO identification information sent by the base station, wherein the LIPA/SIPTO identification information indicates that the secondary base station supports the LIPA/SIPTO function;

The acquiring module is configured to acquire a PDN connection of the corresponding terminal of the primary base station when the slave base station under the primary base station supports the LIPA/SIPTO function according to the LIPA/SIPTO identification information.

In the embodiment of the present invention, the MME receives the LIPA/SIPTO identifier information sent by the base station, where the LIPA/SIPTO identifier information is used to indicate that the base station supports the LIPA/SIPTO function, and the MME determines that the base station supports the base station according to the LIPA/SIPTO identifier information. When the LIPA/SIPTO function is performed, the PDN connection of the corresponding terminal of the base station is obtained, and the subscription information of the terminal corresponding to the PDN connection is obtained, wherein the subscription information indicates that the terminal supports the LIPA/SIPTO function, and the terminal is determined according to the subscription information. When the LIPA/SIPTO function is supported, the PDN connection corresponding to the terminal is released. After the PDN connection is released, if the terminal re-initiates the PDN connection request, the LIPA/SIPTO connection is established with the LGW, so that after the base station increases the LIPA/SIPTO function, The current normal PDN connection can be released in real time, and the LIPA/SIPTO connection is established after the terminal re-initiates the PDN connection request, thereby solving the technical problem that the normal PDN connection cannot be updated to the LIPA/SIPTO connection in real time.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of a LIPA/SIPTO networking according to the prior art;

2 is a schematic diagram of a method for establishing a LIPA/SIPTO connection according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of signaling interaction for establishing a PDN connection procedure according to an embodiment of the present invention; FIG.

4 is a schematic diagram of a signaling interaction of a bearer deactivation process according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of signaling interaction of a detach process according to an embodiment of the present invention; FIG.

6 is a schematic diagram of signaling interaction for establishing a LIPA/SIPTO connection procedure according to an embodiment of the present invention;

7 is a schematic diagram of another method for establishing a LIPA/SIPTO connection according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of another method for establishing a LIPA/SIPTO connection according to an embodiment of the present invention; FIG.

9 is a schematic diagram of another method for establishing a LIPA/SIPTO connection according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of another apparatus for establishing a LIPA/SIPTO connection according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It should be noted that the following embodiments of the present invention can be applied to a LIPA/SIPTO network. As shown in FIG. 1 , the network includes: a terminal, a base station, an MME (Mobility Management Entity), and a SGW. (Serving Gateway, Service Gateway) and HSS (Home Subscriber Server), and the LGW, wherein the terminal is connected to the base station, the base station may be a home base station, and the LGW is deployed on the base station, the base station and the MME Connected, the SGW is connected to the LGW, and the MME is connected to the SGW and the HSS respectively.

A method is provided in this embodiment. FIG. 2 is a flowchart of a method for establishing a LIPA/SIPTO connection according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

Step S202, the MME receives LIPA/SIPTO identification information sent by the base station;

The LIPA/SIPTO identification information is used to indicate that the base station supports the LIPA/SIPTO function.

Step S204, when determining, according to the LIPA/SIPTO identification information, that the base station supports the LIPA/SIPTO function, acquiring a PDN connection of the corresponding terminal of the base station;

Step S206, acquiring subscription information of the terminal corresponding to the PDN connection;

The subscription information indicates that the terminal supports the LIPA/SIPTO function.

Step S208, when determining that the terminal supports the LIPA/SIPTO function according to the subscription information, releasing the PDN connection corresponding to the terminal;

Step S210, after releasing the PDN connection, if the terminal re-initiates the PDN connection request, establish a LIPA/SIPTO connection with the local gateway LGW. Through the above steps, after adding the LIPA/SIPTO function, the base station can release the current normal PDN connection in real time, and complete the LIPA/SIPTO after the terminal re-initiates the PDN connection request. The establishment of the connection solves the technical problem that the normal PDN connection cannot be updated to the LIPA/SIPTO connection in real time. In the embodiment of the present invention, the configuration update message sent by the base station is received, where the configuration update message carries the LIPA/SIPTO identification information; or the ERAB (Evolved Radio Access Bearer) transmitted by the base station is received. And modifying the indication message, wherein the ERAB modification indication message carries the LIPA/SIPTO identification information, so that the base station can send the LIPA/SIPTO identification information to the MME by using any one of the foregoing two manners, so that The state is flexible to send LIPA/SIPTO identification information.

As shown in FIG. 3, the signaling process of the PDN connection includes:

S301. The terminal sends a connection request message to the base station.

S302. The base station sends the connection request message to the MME.

S303. After receiving the connection request message, the MME sends a create session request to the SGW.

S304. The SGW sends the create session request to the PGW.

S305. After receiving the creation session request, the PGW sends a create session response to the SGW.

S306. The SGW sends the create session response to the MME.

S307. After receiving the create session response, the MME sends an initial context setup request to the base station.

S308. The base station receives the initial context setup request, and sends a create bearer message to the terminal.

S309. The terminal creates a PDN connection by using the base station according to the create bearer request.

In the embodiment of the present invention, the bearer deactivation process is initiated; or the detach process is initiated. In this way, the release of the PDN connection is completed by the bearer deactivation process or the detach process.

It should be noted that, when the MME determines that the deactivated bearer is not the last bearer of the terminal, the bearer deactivation process is initiated. When the MME determines that the deactivated bearer is the last bearer, the detach process is initiated, thereby releasing the The PDN connection corresponding to the terminal, as shown in FIG. 4, the signaling process of the bearer deactivation includes:

S401. The MME sends a delete bearer command to the SGW.

S402. The SGW sends the delete bearer command to the PGW.

S403. After receiving the delete bearer command, the PGW sends a delete bearer request to the SGW.

S404. The SGW sends the delete bearer request to the MME.

S405. After receiving the delete bearer request, the MME sends a bearer deactivation request to the base station.

S406. The base station sends the bearer deactivation request to the terminal.

The reason value of the bearer deactivation request is re-created. When the terminal determines that the cause value is re-created, the terminal re-initiates the PDN connection request after releasing the current PDN connection.

S407. After receiving the bearer deactivation request, the terminal sends a bearer deactivation response to the base station.

S408. The base station sends the bearer deactivation response to the MME.

S409. After receiving the bearer deactivation response, the MME sends a delete bearer response to the SGW.

S410. The SGW sends the delete bearer response to the PGW.

In this way, the bearer deactivation process is completed through the above steps S401 to S410, thereby releasing the PDN connection corresponding to the terminal.

As shown in FIG. 5, the detachment signaling process includes:

S501. The MME sends a delete bearer command to the SGW.

S502. The SGW sends the delete bearer command to the PGW.

S503. After receiving the delete bearer command, the PGW sends a delete bearer request to the SGW.

S504. The SGW sends the delete bearer request to the MME.

S505. After receiving the delete bearer request, the MME sends a detach request to the base station.

S506. The base station sends the detach request to the terminal.

The reason value in the detach request is re-created. When the terminal determines that the cause value is re-created, the terminal re-initiates the PDN connection request after releasing the current PDN connection.

S507. After receiving the detach request, the terminal sends a detach response to the base station.

S508. The base station sends the detachment response to the MME.

S509: After receiving the detachment response, the MME sends a delete bearer response to the SGW.

S510. The SGW sends the delete bearer response to the PGW.

In this way, the detachment process is completed through the above steps S501 to S510, thereby releasing the PDN connection corresponding to the terminal.

In the embodiment of the present invention, before releasing the PDN connection corresponding to the terminal, the MME obtains the locally configured LIPA/SIPTO connection priority information, and triggers release of the PDN connection corresponding to the terminal according to the LIPA/SIPTO connection priority information; or, according to The subscription information of the terminal obtains the LIPA/SIPTO connection priority information, and triggers release of the PDN connection corresponding to the terminal according to the LIPA/SIPTO connection priority information.

It should be noted that the LIPA/SIPTO connection priority information may be configured in the MME or may be configured in the subscription information of the terminal. When the LIPA/SIPTO connection priority information is configured in the MME, the MME may obtain the local configuration. The LIPA/SIPTO connection priority information, when the LIPA/SIPTO connection priority information is configured in the subscription information of the terminal, the MME may obtain the subscription information of the terminal from the HSS, and obtain the LIPA/SIPTO connection priority from the subscription information. information.

Wherein, as shown in FIG. 6, the establishment process of the LIPA/SIPTO connection includes:

S601. The terminal sends a connection request message to the base station.

S602. The base station sends the connection request message to the MME.

S603. After receiving the connection request message, the MME sends a create session request to the SGW.

S604. The SGW sends the create session request to the LGW.

S605. After receiving the creation session request, the LGW sends a create session response to the SGW.

S606. The SGW sends the create session response to the MME.

S607. After receiving the create session response, the MME sends an initial context setup request to the base station.

S608. The base station receives the initial context setup request, and sends a create bearer message to the terminal.

S609. The terminal creates a LIPA/SIPTO connection by using the base station according to the create bearer request.

In the embodiment of the present invention, in a dual connectivity scenario, that is, one terminal can use radio resources of at least two different network nodes (such as a base station), and each network node can assume different roles in dual connectivity, where the control plane The function is mainly based on the completion of the primary base station, and the user plane (data transmission) is completed by the secondary base station or the primary base station and the secondary base station. A macro base station is used as a primary base station, and a small base station is used as a secondary base station, thereby realizing the purpose of offloading data from the macro base station to the small base station. In the embodiment of the present invention, the base station includes a primary base station and a secondary base station.

After receiving the LIPA/SIPTO identification information sent by the secondary base station, the primary base station receives the LIPA/SIPTO identification information sent by the primary base station, and determines, according to the LIPA/SIPTO identification information, that the secondary base station under the primary base station supports the LIPA. The /SIPTO function acquires the PDN connection corresponding to the primary base station.

The LIPA/SIPTO identification information is used to indicate that the secondary base station supports the LIPA/SIPTO function, so that in the dual connectivity scenario, the primary base station receives the LIPA/SIPTO identification information sent by the base station, and adds the ERAB modification indication message. The LIPA/SIPTO identification information enables the MME to determine that the secondary base station supports the LIPA/SIPTO function through the configuration update message, so that the current normal PDN connection can be released in real time, and the LIPA/SIPTO connection is completed after the terminal re-initiates the PDN connection request. The establishment solves the technical problem that the normal PDN connection cannot be updated to the LIPA/SIPTO connection in real time.

FIG. 7 is a flowchart of a method for establishing a LIPA/SIPTO connection according to another embodiment of the present invention. As shown in FIG. 7, in this embodiment, LIPA/SIPTO identification information is sent by configuring an update message, and the process includes the following steps. step:

S701. The terminal creates a PDN connection with the PGW through the base station.

For the PDN creation process, refer to the process shown in Figure 3 above, and details are not described herein.

S702. The base station sends a configuration update message to the MME.

The configuration update message carries the LIPA/SIPTO identification information, and the LIPA/SIPTO identification information is used to indicate that the base station supports the LIPA/SIPTO function.

S703. When determining, according to the LIPA/SIPTO identification information, that the base station supports the LIPA/SIPTO function, the MME acquires a PDN connection corresponding to the base station.

S704. The MME obtains subscription information of the terminal corresponding to the PDN connection from the HSS.

In the embodiment of the present invention, the MME obtains the locally configured LIPA/SIPTO connection priority information, and triggers release of the PDN connection corresponding to the terminal according to the LIPA/SIPTO connection priority information; or obtains the LIPA/SIPTO according to the subscription information of the terminal. The priority information is connected, and the PDN connection corresponding to the terminal is triggered according to the LIPA/SIPTO connection priority information.

It should be noted that the LIPA/SIPTO connection priority information may be configured in the MME or may be configured in the subscription information of the terminal. When the LIPA/SIPTO connection priority information is configured in the MME, the MME may obtain the local configuration. The LIPA/SIPTO connection priority information when the LIPA/SIPTO connection priority information is configured In the subscription information of the terminal, the MME may obtain the subscription information of the terminal from the HSS, and obtain the LIPA/SIPTO connection priority information from the subscription information.

S705. The MME releases the PDN connection corresponding to the terminal when the terminal determines that the terminal supports the LIPA/SIPTO function according to the subscription information.

If the MME obtains the LIPA/SIPTO connection priority information, the MME triggers release of the PDN connection corresponding to the terminal according to the LIPA/SIPTO connection priority information.

In the embodiment of the present invention, the bearer deactivation process is initiated; or the detach process is initiated.

It should be noted that, when the MME determines that the deactivated bearer is not the last bearer of the terminal, the bearer deactivation process is initiated. When the MME determines that the deactivated bearer is the last bearer, the detach process is initiated, thereby releasing the The PDN connection corresponding to the terminal, wherein the bearer deactivation process may refer to the process shown in FIG. 4, and the detach process may refer to the process shown in FIG. 5, and details are not described herein again.

S706. After releasing the PDN connection, if the terminal re-initiates the PDN connection establishment request, the MME establishes a LIPA/SIPTO connection with the LGW.

For the establishment process of the LIPA/SIPTO connection, reference may be made to the embodiment shown in FIG. 6, and details are not described herein again.

It should be noted that, after the terminal determines that the cause value in the bearer deactivation request or the detach request received during the release of the PDN connection is re-created, the terminal re-initiates the PDN connection request.

Through the above steps, the base station can add the LIPA/SIPTO identification information in the configuration update message, so that the MME can determine that the base station supports the LIPA/SIPTO function by using the configuration update message, so that the current normal PDN connection can be released in real time and restarted in the terminal. After the PDN connection request is initiated, the establishment of the LIPA/SIPTO connection is completed, thereby solving the technical problem that the normal PDN connection cannot be updated to the LIPA/SIPTO connection in real time.

FIG. 8 is a flowchart of a method for establishing a LIPA/SIPTO connection according to another embodiment of the present invention. As shown in FIG. 8, in this embodiment, the LIPA/SIPTO identification information is sent by using an ERAB modification indication message, where the process includes The following steps:

S801. The terminal creates a PDN connection with the PGW through the base station.

S802. The base station sends an ERAB modification indication message to the MME.

The ERAB modification indication message carries the LIPA/SIPTO identification information, and the LIPA/SIPTO identification information is used to indicate that the base station supports the LIPA/SIPTO function.

S803. When determining, according to the LIPA/SIPTO identification information, that the base station supports the LIPA/SIPTO function, the MME acquires a PDN connection of the terminal corresponding to the ERAB modification indication message.

S804. The MME obtains subscription information of the terminal from the HSS.

S805. The MME releases the PDN connection corresponding to the terminal when the terminal determines that the terminal supports the LIPA/SIPTO function according to the subscription information.

S806. After releasing the PDN connection, if the terminal re-initiates the PDN connection establishment request, the MME establishes a LIPA/SIPTO connection with the LGW.

Through the above steps, the base station adds the LIPA/SIPTO identification information in the ERAB modification indication message, so that the MME can determine that the base station supports the LIPA/SIPTO function through the configuration update message, so that the current normal PDN connection can be released in real time, and the terminal After the PDN connection request is re-initiated, the establishment of the LIPA/SIPTO connection is completed, thereby solving the technical problem that the normal PDN connection cannot be updated to the LIPA/SIPTO connection in real time.

FIG. 9 is a flowchart of a method for establishing a LIPA/SIPTO connection according to another embodiment of the present invention. As shown in FIG. 9, this embodiment is in a dual connectivity scenario, that is, one terminal can use at least two different networks. The radio resources of a node (such as a base station), each network node can assume different roles in dual connectivity, wherein the control plane function is mainly based on the completion of the primary base station, and the user plane (data transmission) is completed by the secondary base station or the primary base station and the secondary base station The base station is completed together. In the embodiment of the present invention, the base station includes a primary base station and a secondary base station, and the base station includes the following steps:

S901. The terminal creates a PDN connection with the PGW through the primary base station.

S902. Send the LIPA/SIPTO identification information from the base station to the primary base station.

S903. The primary base station sends an ERAB modification indication message to the MME.

The ERAB modification indication message carries the LIPA/SIPTO identification information, where the LIPA/SIPTO identification information is used to indicate that the secondary base station supports the LIPA/SIPTO function.

S 904. The MME obtains the PDN connection between the terminal corresponding to the ERAB modification indication message and the primary base station when the slave base station under the primary base station supports the LIPA/SIPTO function according to the LIPA/SIPTO identification information.

S905. The MME acquires subscription information of the terminal corresponding to the PDN connection obtained from the HSS.

In the embodiment of the present invention, before releasing the PDN connection corresponding to the terminal, the MME obtains the locally configured LIPA/SIPTO connection priority information, and triggers release of the terminal corresponding to the LIPA/SIPTO connection priority information. The PDN connection is obtained; or the LIPA/SIPTO connection priority information is obtained according to the subscription information of the terminal, and the PDN connection corresponding to the terminal is triggered according to the LIPA/SIPTO connection priority information.

S906. The MME releases the PDN connection corresponding to the terminal when the terminal determines that the terminal supports the LIPA/SIPTO function according to the subscription information.

S907. After releasing the PDN connection, if the terminal re-initiates the PDN connection request, the MME establishes a LIPA/SIPTO connection with the LGW.

The MME establishes a LIPA/SIPTO connection with the LGW, thereby completing establishment of a LIPA/SIPTO connection between the terminal and the secondary base station, thereby implementing data splitting from the primary base station to the secondary base station.

Through the above steps, in the dual connectivity scenario, the primary base station receives the LIPA/SIPTO identification information sent from the base station, and adds the LIPA/SIPTO identification information to the ERAB modification indication message, so that the MME can determine the secondary base station by using the configuration update message. Support LIPA/SIPTO function, so that the current normal PDN connection can be released in real time, and the LIPA/SIPTO connection is established after the terminal re-initiates the PDN connection request, thereby solving the problem that the normal PDN connection cannot be updated to the LIPA/SIPTO connection in real time. Technical problem.

In this embodiment, a device for establishing a LIPA/SIPTO connection is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 10 is a structural block diagram of a device for establishing a LIPA/SIPTO connection according to an embodiment of the present invention. The device is applied to an MME. As shown in FIG. 10, the device 100 includes:

The receiving module 101 is configured to receive LIPA/SIPTO identification information sent by the base station, where the LIPA/SIPTO identification information is used to indicate that the base station supports the LIPA/SIPTO function;

In the embodiment of the present invention, the receiving module 101 is configured to receive a configuration update message sent by the base station, where the configuration update message carries the LIPA/SIPTO identification information, and receives an evolved radio access bearer ERAB sent by the base station. Modifying the indication message, wherein the ERAB modification indication message carries the LIPA/SIPTO identification information.

The obtaining module 102 is configured to: when determining, according to the LIPA/SIPTO identification information received by the receiving module 101, that the base station supports the LIPA/SIPTO function, acquiring a public data network PDN connection of the base station corresponding terminal, and acquiring the terminal corresponding to the PDN connection The subscription information, wherein the subscription information indicates that the terminal supports the LIPA/SIPTO function.

The processing module 103 is configured to release the PDN connection corresponding to the terminal when the terminal supports the LIPA/SIPTO function according to the subscription information acquired by the obtaining module 102.

In the embodiment of the present invention, the obtaining module 102 is further configured to obtain the locally configured LIPA/SIPTO connection priority information before the processing module 103 releases the PDN connection corresponding to the terminal; or obtain the same according to the subscription information of the terminal. LIPA/SIPTO connection priority information;

The processing module 103 is configured to trigger release of the PDN connection corresponding to the terminal according to the LIPA/SIPTO connection priority information.

In the embodiment of the present invention, the processing module 103 is configured to initiate a bearer deactivation process and initiate a detach process.

The connection module 104 is configured to establish a LIPA/SIPTO connection with the LGW if the terminal re-initiates the PDN connection request after the processing module 103 releases the PDN connection.

In the embodiment of the present invention, in a dual connectivity scenario, that is, one terminal can use radio resources of at least two different network nodes (such as a base station), and each network node can assume different roles in dual connectivity, where the control plane The function is mainly based on the completion of the primary base station, and the user plane (data transmission) is completed by the secondary base station or the primary base station and the secondary base station. In the embodiment of the present invention, the receiving module is configured to include a primary base station and a secondary base station in the base station, where the primary base station serves as the primary base station, and the small base station serves as the secondary base station, thereby implementing data splitting from the macro base station to the small base station. Receiving LIPA/SIPTO identification information sent by the primary base station after receiving the LIPA/SIPTO identification information sent by the secondary base station, where the LIPA/SIPTO identification information is used to indicate that the secondary base station supports LIPA/SIPTO Features;

The obtaining module 102 is configured to acquire a PDN connection of the corresponding terminal of the primary base station when the slave base station under the primary base station supports the LIPA/SIPTO function according to the LIPA/SIPTO identification information.

By adopting the above device, the current normal PDN connection can be released in real time, and the LIPA/SIPTO connection is established after the terminal re-initiates the PDN connection request, thereby solving the technical problem that the normal PDN connection cannot be updated to the LIPA/SIPTO connection in real time. .

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

In summary, the method in the present invention is implemented by improving the S1AP message based on the LIPA/SIPTO function, and the UE subscription information of the HSS is increased by the LIPA/SIPTO priority subscription item or the MME network element is added. LIPA/SIPTO priority configuration item. The main steps include the following:

Step 1: A normal PDN connection has been created. After the LIPA/SIPTO function is deployed on the base station, the MME is notified by a configuration update or an ERAB modification message.

Step 2: The MME determines whether to release the normal PDN connection according to the LIPA/SIPTO capability of the HeNB, whether the UE subscribes to the LIPA/SIPTO subscription, and whether the local office configures the LIPA/SIPTO priority, and triggers the UE to re-initiate the creation, thereby establishing the LIPA PDN. connection.

Optionally, the MME determines whether to release the normal PDN connection according to whether the UE subscribes to the LIPA/SIPTO priority, and triggers the UE to re-initiate the creation, thereby establishing a LIPA/SIPTO connection.

Step 3: If LIPA/SIPTO priority is supported, the MME releases the PDN connection with the user of the base station, triggers the user to initiate a new PDN connection request, and establishes a LIPA connection.

The method described in the present invention can re-determine whether a LIPA connection needs to be established according to all the bearer connections of the base station; or it can re-determine whether the LIPA connection needs to be established only for the PDN connection corresponding to a certain bearer.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The technical solution provided by the embodiment of the present invention can be applied to the LIPA/SIPTO connection establishment process, where the MME receives the LIPA/SIPTO identification information sent by the base station, where the LIPA/SIPTO identification information is used to indicate that the base station supports the LIPA/SIPTO function. And determining, by the eNB, that the base station supports the LIPA/SIPTO function according to the LIPA/SIPTO identification information, acquiring a PDN connection of the corresponding terminal of the base station, and acquiring subscription information of the terminal corresponding to the PDN connection, where the subscription information indicates the terminal The LIPA/SIPTO function is supported. When the terminal supports the LIPA/SIPTO function according to the subscription information, the PDN connection corresponding to the terminal is released. After the PDN connection is released, if the terminal re-initiates the PDN connection request, the LIPA is established with the LGW. /SIPTO connection, in this way, after adding the LIPA/SIPTO function, the base station can release the current normal PDN connection in real time, and complete the establishment of the LIPA/SIPTO connection after the terminal re-initiates the PDN connection request, thereby solving the problem that the ordinary PDN cannot be real-time. The connection is updated to the technical issue of the LIPA/SIPTO connection.

Claims

A method for establishing a local IP access LIPA/selecting IP traffic offload SIPTO connection, including:

The mobile management entity MME receives the LIPA/SIPTO identification information sent by the base station, where the LIPA/SIPTO identification information is used to indicate that the base station supports the LIPA/SIPTO function;

Obtaining, when the base station supports the LIPA/SIPTO function according to the LIPA/SIPTO identification information, acquiring a public data network PDN connection of the base station corresponding terminal;

Obtaining subscription information of the terminal corresponding to the PDN connection, where the subscription information indicates that the terminal supports the LIPA/SIPTO function;

Determining, when the terminal supports the LIPA/SIPTO function according to the subscription information, releasing a PDN connection corresponding to the terminal;

After releasing the PDN connection, if the terminal re-initiates a PDN connection request, establish a LIPA/SIPTO connection with the local gateway LGW.
The method of claim 1, wherein the receiving, by the MME, the LIPA/SIPO identification information sent by the base station comprises:

Receiving a configuration update message sent by the base station, where the configuration update message carries the LIPA/SIPTO identification information; or

Receiving an evolved radio access bearer ERAB modification indication message sent by the base station, where the ERAB modification indication message carries the LIPA/SIPTO identification information.
The method of claim 2, wherein releasing the PDN connection corresponding to the terminal comprises:

Initiate a bearer deactivation process; or initiate a detach process.
The method according to any one of claims 1 to 3, wherein

Before the releasing the PDN connection corresponding to the terminal, the method further includes: obtaining the locally configured LIPA/SIPTO connection priority information; or obtaining the LIPA/SIPTO connection priority information according to the subscription information of the terminal;

The releasing the PDN connection corresponding to the terminal includes: triggering release of the PDN connection corresponding to the terminal according to the LIPA/SIPTO connection priority information.
The method according to claim 4, wherein the base station comprises a primary base station and a secondary base station, and the MME receives the LIPA/SIPTO identification information sent by the base station, including:

After receiving the LIPA/SIPTO identification information sent by the secondary base station, the primary base station receives LIPA/SIPTO identification information sent by the primary base station, where the LIPA/SIPTO identification information is used to indicate that the secondary base station supports LIPA/SIPTO function;

When determining, according to the LIPA/SIPTO identification information, that the base station supports the LIPA/SIPTO function, acquiring a PDN connection of the corresponding terminal of the base station includes:

And determining, according to the LIPA/SIPTO identification information, that the slave base station under the primary base station supports the LIPA/SIPTO function, acquiring a PDN connection of the corresponding terminal of the primary base station.
A device for establishing a local IP access LIPA/selecting IP traffic offload SIPTO connection is applied to a mobility management entity MME, and the device includes:

a receiving module, configured to receive LIPA/SIPTO identification information sent by the base station, where the LIPA/SIPTO identification information is used to indicate that the base station supports the LIPA/SIPTO function;

An acquiring module, configured to: when determining, according to the LIPA/SIPTO identification information received by the receiving module, that the base station supports the LIPA/SIPTO function, acquiring a public data network PDN connection of the base station corresponding terminal, and acquiring the PDN connection The subscription information of the corresponding terminal, wherein the subscription information indicates that the terminal supports the LIPA/SIPTO function;

a processing module, configured to release a PDN connection corresponding to the terminal when the terminal supports the LIPA/SIPTO function according to the subscription information acquired by the acquiring module;

The connection module is configured to establish a LIPA/SIPTO connection with the LGW if the terminal re-initiates the PDN connection request after the processing module releases the PDN connection.
The apparatus according to claim 6, wherein the receiving module is configured to receive a configuration update message sent by the base station, wherein the configuration update message carries the LIPA/SIPTO identification information; and receiving the base station The transmitted evolved radio access bearer ERAB modification indication message, where the ERAB modification indication message carries the LIPA/SIPTO identification information.
The apparatus of claim 7, wherein the processing module is configured to initiate a bearer deactivation process and initiate a detach process.
The apparatus according to any one of claims 6 to 8, wherein

The obtaining module is further configured to obtain the locally configured LIPA/SIPTO connection priority information before the processing module releases the PDN connection corresponding to the terminal; or obtain the LIPA/SIPTO connection according to the subscription information of the terminal. Priority information

The processing module is configured to trigger release of the PDN connection corresponding to the terminal according to the LIPA/SIPTO connection priority information.
The apparatus according to claim 9, wherein

The receiving module is configured to receive, after the base station includes the primary base station and the secondary base station, the LIPA/SIPTO identifier sent by the primary base station after the primary base station receives the LIPA/SIPTO identification information sent by the secondary base station. Information, wherein the LIPA/SIPTO identification information is used to indicate that the secondary base station supports the LIPA/SIPTO function;

The acquiring module is configured to acquire a PDN connection of the corresponding terminal of the primary base station when the slave base station under the primary base station supports the LIPA/SIPTO function according to the LIPA/SIPTO identification information.