WO2012051892A1

WO2012051892A1 - Method and system for data routing control

Info

Publication number: WO2012051892A1
Application number: PCT/CN2011/079893
Authority: WO
Inventors: 王静; 周娜
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-10-22
Filing date: 2011-09-20
Publication date: 2012-04-26
Also published as: CN102457931A; CN102457931B

Abstract

The present invention discloses a method for data routing control, which includes: when a local access connection is established, a mobility management unit in the core network transmits the type information of the local access connection to a base station; the base station transmits the type information of the local access connection to a local gateway, when establishing the direct data channel to the local gateway; the local gateway performs the data routing control in accordance with the type information of the local access connection. Accordingly, the present invention also discloses a system for the data routing control. With the present invention, the configuration specific to users at the local gateway can be avoided, operation is simplified and implementation is facilitated.

Description

Data routing control method and system

The present invention relates to the field of mobile communications, and in particular, to a data routing control method and system. Background technique

As the air interface rate continues to increase and the number of data users increases, the amount of user data will increase explosively in the future. This will inevitably impact the existing core network. The existing core network elements have to be expanded. In order to provide users with satisfactory service. Considering that the increased data is mostly caused by the internet service, the mobile operator hopes to perform local internet data offloading without changing the existing network, avoiding a large amount of data impacting the core network and meeting the user's needs, thereby proposing local access. the concept of.

The introduction of home base stations (HNBs, Home NodeBs) extends the range of applications for local access. As the exclusive resource of some users, the home base station is deployed in private places such as homes, groups, companies or schools, mainly to provide users with higher service rates and lower the cost of using high-speed services. Insufficient coverage of distributed cellular wireless communication systems. Users can access other IP devices in the home network and IP devices in the enterprise network through the home base station. This application is also called local access because the data stream is not sent through the core network. The 3GPP standards organization defines local access functions including Selected IP Traffic Offload (SIPTO) for access to Internet networks and Local IP Access (LIPA) for access to local network IP devices. .

In order to implement the local access function, a gateway for performing data offloading needs to be added in the network. FIG. 1 is a schematic diagram of a data flow path for local access and traditional core network access, and the data offload gateway may be combined with a wireless side network element or a wireless side network element. Nearby (ie, external), it can also be combined with the home base station gateway or near the home base station gateway (ie, external). For users who support local access, A traditional core network access data path and a local access data path can be established at the same time. As shown in Figure 1, for a locally accessed connection, the local access data path is from the terminal to the wireless side network element to the data offload gateway, and the data transmission does not pass through the core network. In order to achieve local access of the terminal to other IP devices or the Internet of the home network, two local access connections can be established, and the first local access data path directly accesses the Internet (Internet IP connection, ie SIPTO connection). The second local access data path directly accesses other IP devices on the home network (home network IP connection, ie LIPA connection).

Figure 2 shows a schematic diagram of a system architecture for performing local access. The data offload gateway can be set up or separated from the wireless side network element. This architecture takes the case of a home base station as an example. The user uplink local access data received by the home base station is sent from the interface between the home base station and the data offload gateway, and the downlink local access data received by the data offload gateway is also sent from the interface, and the interface has the GTP-C and GTP-U protocols. Stack, no standardized name yet. The local access connection is managed by the control plane network element through the service gateway to the data offload gateway. The packet data gateway is used to forward core network data. The core network downlink data is sent through the home base station, the service gateway, and the packet data gateway. The S1-MME, Sl-U, and S5 interfaces in the architecture are standardized interfaces, and the present invention does not describe the specific functions.

From the perspective of the local access application of the home base station, it is mainly used for home and enterprise support access to the local network and the Internet or other specific IP networks. For the needs of the home and business managers, some users may only be allowed to access a type of network, for example, only LIPA access or only SIPTO access. The user can distinguish between the data accessed by the LIPA or the data accessed by the SIPTO through the PDN connection. However, the local gateway only serves as a forwarding function. For the user to maliciously access the SIPTO network through the LIPA PDN connection, the local gateway cannot monitor. In this case, the firewall is generally configured to perform data routing control on the local gateway. However, in this way, if user-level control is to be performed, a large amount of specific configuration to the user needs to be performed on the local gateway, thereby achieving cumbersome implementation. Summary of the invention

In view of this, the main purpose of the present invention is to provide a data routing control method and system, which can avoid specific user-to-user configuration on the local gateway, simplify operation, and is easy to implement.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A data routing control method includes:

When the local access connection is established, the core network mobility management unit sends the local access connection type information to the base station;

Sending, by the base station, the local access connection type information to the local gateway when establishing a direct data channel with the local gateway;

The local gateway performs data routing control according to the local access connection type information. The local access connection type is: a local access connection for a LIPA application and/or a local access connection for a SIPTO application.

The core network mobility management unit is a mobility management entity MME or a serving GPRS support node SGSN.

The signaling interface between the base station and the core network mobility management unit is an S1 interface or an Iu interface.

The local gateway performs data routing control according to the local access connection type information: The local gateway performs data flow direction differentiation according to the local access connection type, and controls data transmission on the connection.

A data routing control system, comprising: a core network mobility management unit, a base station, and a local gateway;

The core network mobility management unit is configured to send local access connection type information to the base station when the local access connection is established;

The base station is configured to send the local access connection type information to a local gateway when establishing a direct data channel with the local gateway;

The local gateway is configured to perform data routing according to the local access connection type information Control.

The local access connection type is: a local access connection for a LIPA application and/or a local access connection for a SIPTO application.

The data routing control method and system of the present invention, when the user performs local access, the local gateway performs data routing control by distinguishing the local access connection type. In actual application, only the configuration of the local access connection type needs to be performed on the local gateway. Data routing control, which avoids specific user-to-user configuration on the local gateway, simplifies operations, and is easy to implement. DRAWINGS

Figure 1 is a schematic diagram of data flow paths for local access and traditional core network access;

2 is a schematic diagram of a system architecture for performing local access;

3 is a schematic flowchart of a data routing control method according to the present invention;

4 is a schematic flowchart of a data routing control method according to Embodiment 1 of the present invention;

5 is a schematic flowchart of a data routing control method according to Embodiment 2 of the present invention;

6 is a schematic flowchart of a data routing control method according to Embodiment 3 of the present invention;

FIG. 7 is a schematic flowchart of a data routing control method according to Embodiment 4 of the present invention. detailed description

The basic idea of the present invention is: When the user performs local access, the local gateway performs data routing control by distinguishing the local access connection type. 3 is a schematic flowchart of a data routing control method according to the present invention. As shown in FIG. 3, the method includes:

Step 301: When the local access connection is established, the core network mobility management unit sends the local access connection type information to the base station.

Here, the local access connection type is generally: a local access connection for LIPA applications and/or a local access connection for SIPTO applications.

It should be noted that the core network mobility management unit may be a mobility management entity MME or a serving GPRS support node SGSN. The signaling interface between the base station and the core network mobility management unit may be an S1 interface or an Iu interface.

Step 302: The base station sends the local access connection type information to the local gateway when establishing a direct data channel with the local gateway.

Step 303: The local gateway performs data routing control according to the local access connection type information.

Here, the local gateway performs data routing control according to the local access connection type information: The local gateway performs data flow direction differentiation according to the local access connection type, and controls transmission of data on the connection.

It should be noted that in order to implement data routing control, the provision of data routing is pre-configured on the local gateway. For example, data on a local access connection for a LIPA application can only be LIPA accessed, and external routing is not allowed. The data on the local access connection for the SIPTO application can only be SIPTO accessed, and internal routing is not allowed. Data is not restricted for routing on local access connections that can be used for both LIPA and SIPTO applications.

The present invention also provides a data routing control system, the system comprising: a core network mobility management unit, a base station, and a local gateway;

The base station is configured to: when establishing a direct data channel with the local gateway, The ground access connection type information is sent to the local gateway;

The local gateway is configured to perform data routing control according to the local access connection type information.

The implementation of the technical solution will be further described in detail below with reference to the specific embodiments and the accompanying drawings. Example 1

This embodiment is described by taking a user-initiated attaching process as an example. FIG. 4 is a schematic flowchart of a data routing control method according to Embodiment 1 of the present invention. As shown in FIG. 4, the method includes:

Step 401: The terminal initiates an attach procedure, where the attach request message carries the APN that the user wants to access the network, and the home base station sends the information such as the CSG ID, the access mode, and the local gateway address of the base station to the AS message through the AS message in the process of forwarding the attach request message. Core network mobility management unit.

Step 402: The core network mobility management unit determines whether the user requests local access according to the content reported by the message in combination with the user subscription, and determines the local access connection type if local access is requested. Local access connection types include: Local access connections for LIPA applications, Local access connections for SIPTO applications, or both.

Step 403 to step 406: When determining that a local access connection needs to be established, the core network mobility management unit establishes a data channel between the local gateway and the core network serving gateway according to the local gateway address carried by the base station, and is used for local access when the downlink data arrives. The paging process is triggered. Step 407: The core network mobility management unit carries the local access connection type in the initial context setup request message when instructing the home base station to establish the radio bearer.

Step 408: The home base station establishes an RRC connection with the terminal.

Step 409: After the RRC connection setup is completed, the home base station returns an initial context setup response message to the mobility management unit.

Step 410: In the case that the home base station and the local gateway are separated, the home base station informs the local gateway of the local access connection type by creating a session request message. If the home base station and the local gateway are combined, then this notification is an internal operation. In this embodiment, the interface of the GTP protocol stack between the home base station and the local gateway is taken as an example. The principle of other protocols (such as PMIP) between the home base station and the local gateway is similar, and the specific message is not limited. .

Step 411: The local gateway returns a create session response message.

Step 412: Each network element device completes the steps required for the subsequent attach process.

It should be noted that in order to implement data routing control, the provision of data routing is pre-configured on the local gateway. For example, data on a local access connection for a LIPA application can only be LIPA accessed, and external routing is not allowed. The data on the local access connection for the SIPTO application can only be SIPTO accessed, and internal routing is not allowed. Data is not restricted for routing on local access connections that can be used for both LIPA and SIPTO applications. Example 2

This embodiment is described by taking a user requesting a PDN connection establishment process as an example. FIG. 5 is a schematic flowchart of a data routing control method according to Embodiment 2 of the present invention. As shown in FIG. 5, the method includes:

Step 501: The terminal initiates a PDN connection establishment request process, where the request message carries the APN that the user wants to access the network, and the home base station forwards the CSG ID, the access mode, and the local gateway of the base station in the process of forwarding the service request message that causes the user to enter the connection state. Information such as addresses is sent to the core network mobility management unit through AS messages.

Step 502: The core network mobility management unit combines the user's signing judgment according to the content reported by the message. Whether the user requests local access, and determines the local access connection type if local access is requested. Local access connection types include: Local access connections for LIPA applications, Local access connections for SIPTO applications, or both.

Step 503 to step 506: The core network mobility management unit establishes a data channel between the local gateway and the core network serving gateway according to the local gateway address carried by the base station when determining that the local access connection needs to be established, for locally accessing the paging when the downlink data arrives. Process trigger.

Step 507: The core network mobility management unit carries the local access connection type in the bearer setup request message when instructing the home base station to establish the radio bearer.

Step 508: The home base station establishes an RRC connection with the terminal.

Step 509: After the RRC connection establishment is completed, the home base station returns a bearer setup response message to the mobility management unit.

Step 510: In the case that the home base station and the local gateway are separated, the home base station informs the local gateway of the local access connection type by creating a session request message. If the home base station and the local gateway are combined, this notification is an internal operation. In this embodiment, an interface of the GTP protocol stack between the home base station and the local gateway is used as an example. The principle of other protocols (such as PMIP) between the home base station and the local gateway is similar, and the specific message is not limited. .

Step 511: The local gateway returns a create session response message.

Step 512: Each network element device completes the steps required for the subsequent request PDN connection establishment process. It should be noted that in order to implement data routing control, the provision of data routing is pre-configured on the local gateway. For example, data on a local access connection for a LIPA application can only be LIPA accessed, and external routing is not allowed. The data on the local access connection for the SIPTO application can only be SIPTO accessed, and internal routing is not allowed. Data is not restricted for routing on local access connections that can be used for both LIPA and SIPTO applications. Example 3

In this embodiment, the GPRS network is used, and the core network mobility management unit is the S4 SGSN. For example, FIG. 6 is a schematic flowchart of a data routing control method according to Embodiment 3 of the present invention. As shown in FIG. 6, the method includes:

Step 601: The terminal requests PDP context activation, where the request message carries the user wants to access the network, and the home base station forwards the CSG ID, the access mode, the local gateway address, etc. of the base station in the process of forwarding the service request message that causes the user to enter the connection state. The information is sent to the core network mobility management unit through the AS message.

Step 602: The core network mobility management unit determines whether the user requests local access according to the content reported by the message in combination with the user subscription, and determines the local access connection type if local access is requested. Local access connection types include: Local access connections for LIPA applications, Local access connections for SIPTO applications, or both.

Step 603 to step 606: The core network mobility management unit establishes a data channel between the local gateway and the core network serving gateway according to the local gateway address carried by the base station when determining that the local access connection needs to be established, for locally accessing the paging when the downlink data arrives. Process trigger.

Step 607: The core network mobility management unit carries the local access connection type in the wireless access bearer setup request message when the home base station is instructed to establish the radio bearer.

Step 608: The home base station establishes an RRC connection with the terminal.

Step 609: After the RRC connection establishment is completed, the home base station returns a radio access message to the mobility management unit.

Step 610: In the case that the home base station and the local gateway are separated, the home base station informs the local gateway of the local access connection type by creating a session request message. If the home base station and the local gateway are combined, then this notification is an internal operation. In this embodiment, the interface of the GTP protocol stack between the home base station and the local gateway is taken as an example. The principle of other protocols (such as PMIP) between the home base station and the local gateway is similar, and the specific message is not limited. .

Step 611: The local gateway returns a create session response message.

Step 612: Each network element device completes the steps required for the subsequent PDP context activation process. It should be noted that in order to implement data routing control, the provision of data routing is pre-configured on the local gateway. For example, data on a local access connection for a LIPA application can only be LIPA accessed, and external routing is not allowed. The data on the local access connection for the SIPTO application can only be SIPTO accessed, and internal routing is not allowed. There is no reason for routing restrictions on data on local access connections that can be used for both LIPA and SIPTO applications. Example 4

In this embodiment, a case where the GPRS network and the core network mobility management unit are Gn/Gp SGSNs are taken as an example for description. FIG. 7 is a schematic flowchart of a data routing control method according to Embodiment 4 of the present invention. As shown in FIG. 7, the method includes:

Step 701: The terminal requests the PDP context to be activated, and the request message carries the APN that the user wants to access the network, and the home base station forwards the CSG ID, the access mode, the local gateway address, etc. of the base station in the process of forwarding the service request message that causes the user to enter the connection state. The information is sent to the core network mobility management unit through the AS message.

Step 702: The core network mobility management unit determines whether the user requests local access according to the content reported by the message in combination with the user subscription, and determines the local access connection type if local access is requested. Local access connection types include: Local access connections for LIPA applications, Local access connections for SIPTO applications, or both.

Step 703 to step 704: The core network mobility management unit establishes a data channel between the local gateway and the core network serving gateway according to the local gateway address carried by the base station when determining that the local access connection needs to be established, for locally accessing the paging when the downlink data arrives. Process trigger.

Step 705: The core network mobility management unit carries the local access connection type in the wireless access bearer setup request message when instructing the home base station to establish the radio bearer.

Step 706: The home base station establishes an RRC connection with the terminal.

Step 707: After the establishment of the RRC connection is completed, the home base station returns a radio access message to the mobility management unit. Step 708: In the case that the home base station and the local gateway are separated, the home base station informs the local gateway of the local access connection type by creating a PDP context request message. If the home base station and the local gateway are combined, then this notification is an internal operation. In this embodiment, the interface of the GTP protocol stack between the home base station and the local gateway is taken as an example. The principle of other protocols (such as PMIP) between the home base station and the local gateway is similar, and the specific message is not limited. .

Step 709: The local gateway returns a Create PDP Context Response message.

Step 710: Each network element device completes the steps required for the subsequent PDP context activation process.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A data routing control method, wherein the method comprises:

The local gateway performs data routing control according to the local access connection type information.

2. The method of claim 1, wherein the local access connection type is: a local access connection for a LIPA application and/or a local access connection for a SIPTO application.

3. The method according to claim 1, wherein the core network mobility management unit is a mobility management entity MME or a serving GPRS support node SGSN.

The method according to claim 1, wherein the signaling interface between the base station and the core network mobility management unit is an S1 interface or an Iu interface.

The method according to claim 1, wherein the local gateway performs data routing control according to the local access connection type information: the local gateway performs data flow direction differentiation according to the local access connection type, and controls transmission of data on the connection.

A data routing control system, wherein the system comprises: a core network mobility management unit, a base station, and a local gateway;

7. The system according to claim 6, wherein the local access connection type is: Local access connections for LIPA applications and/or local access connections for SIPTO applications.

8. The system according to claim 6, wherein the core network mobility management unit is a mobility management entity MME or a serving GPRS support node SGSN.

The system according to claim 6, wherein the signaling interface between the base station and the core network mobility management unit is an S1 interface or an Iu interface.

10. The system according to claim 6, wherein the local gateway performs data routing control according to the local access connection type information: the local gateway performs data flow direction differentiation according to the local access connection type, and controls transmission of data on the connection.