WO2010063175A1

WO2010063175A1 - Method, device and system for data gateway handover

Info

Publication number: WO2010063175A1
Application number: PCT/CN2009/073028
Authority: WO
Inventors: 胡颖; 张进; 戚彩霞
Original assignee: 华为技术有限公司
Priority date: 2008-12-04
Filing date: 2009-07-31
Publication date: 2010-06-10
Also published as: CN101754305A

Abstract

A method, device and system for data gateway handover are disclosed. The method includes the following steps: receiving handover request indication; according to the indication above, obtaining the IP address allocated for a terminal by source data gateway; establishing a data connection tunnel according to said IP address with an access point. According to the embodiment above, the IP address of said terminal can be kept unchangeable before or after data gateway handover, and thus the application service data on said terminal can be kept continuous.

Description

Method, device and system for realizing data gateway switching

The present application claims priority to Chinese Patent Application No. 200810182761.8, entitled "Method, Apparatus and System for Implementing Data Gateway Switching", which is filed on Dec. 4, 2008, the entire contents of which are incorporated herein by reference. In this application.

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method, device and system for implementing data gateway switching.

Background technique

In the next generation mobile communication network, the user terminal accesses the mobile communication network through the local wireless access network. The data gateway is used for the user terminal to access the PDN (Packet Data Network), and is mainly responsible for the data connection management and data forwarding related to the PDN of the user terminal, and also provides the anchor point of the mobile service for the user terminal. That is, after the user terminal accesses the mobile network and establishes a data connection with the data gateway, the data gateway allocates a connected IP (Internet Protocol) address to the user terminal, so that the user terminal can use the IP address to access the PDN.

When a user terminal accesses a PDN through a data gateway, the current data gateway can no longer provide a data connection service for the user terminal for some special reasons, such as network management needs, load sharing, and the like. Therefore, the current data gateway needs to migrate the data connection of the user terminal to another data gateway. This process of migrating the data connection is also the process of data gateway switching.

In the prior art, when the data gateway fails to provide a data connection service for the user terminal and initiates a data gateway handover, the user terminal re-establishes a data connection relationship with another data gateway. When the new data gateway establishes a data connection with the user terminal, it assigns a new IP address to the user terminal, causing the user terminal to access the PDN using the new IP address.

However, in the process of creating the present invention, the inventors found that at least the following problems exist in the prior art: When the switched data gateway assigns a new IP address to the user terminal, the new IP address and the data before the handover The IP address assigned to the user terminal by the gateway is different, and the upper layer service of the user terminal needs to re-establish the session connection. However, during the re-establishment of the session connection, the application session of the application layer of the user terminal will be temporarily interrupted, so that the application service data of the user terminal is discontinuous. Summary of the invention Embodiments of the present invention provide a method, apparatus, and system for implementing data gateway handover, so that application service data of a user terminal is guaranteed to be continuous during a handover process of a data gateway.

The embodiment of the invention discloses a method for implementing data gateway switching. The method includes: receiving a handover request indication, and according to the handover request, obtaining an Internet Protocol IP address allocated by the source data gateway for the user terminal; establishing with the access node The data connection tunnel of the IP address.

The embodiment of the present invention further discloses an apparatus for implementing data gateway switching, where the apparatus includes: a receiving unit, configured to receive a handover request indication; and an IP address obtaining unit, configured to acquire a source data gateway as a user according to the handover request indication The IP address assigned by the terminal; the data connection tunnel establishing unit, configured to establish a data connection tunnel of the IP address with the access node.

The embodiment of the invention further discloses a system for implementing data gateway switching, the system comprising: a source data gateway, configured to send an IP address allocated for a user terminal to the target data gateway; and a target data gateway, configured to receive And switching the request indication, and acquiring an IP address allocated by the source data gateway for the user terminal from the source data gateway, and establishing a data connection tunnel with the access node.

After the data gateway receives the handover request message sent by the source data gateway, the target data gateway obtains the IP address allocated by the source data gateway for the user terminal from the source data gateway, and after the data gateway is switched, according to the source. The data gateway interacts with the user terminal for the IP address assigned by the user terminal, so that the IP address of the user terminal does not change before and after the data gateway is switched, and the upper layer service of the user terminal does not need to re-establish the session connection. Therefore, the application session of the application layer of the user terminal is also not interrupted, and the continuity of the application service data of the user terminal is ensured.

DRAWINGS

FIG. 1 is a flowchart of a method for implementing data gateway handover according to Embodiment 1 of the present invention; FIG. 2 is a signaling flow diagram of a method for implementing data gateway handover according to Embodiment 2 of the present invention;

3 is a signaling flow diagram of a method for implementing data gateway handover according to Embodiment 3 of the present invention;

FIG. 4 is a structural diagram of an apparatus for implementing data gateway switching according to Embodiment 4 of the present invention; FIG. 5 is a structural diagram of a system for implementing data gateway switching according to Embodiment 4 of the present invention. detailed description

The embodiments of the invention are described in detail below with reference to the accompanying drawings. Embodiment 1

Referring to FIG. 1 , FIG. 1 is a flowchart of a method for implementing data gateway switching according to an embodiment of the present invention. Here, for convenience of description, a currently accessed data gateway is referred to as a “source data gateway”, and is switched. The latter data gateway is called the "target data gateway", and the switch includes the following steps:

Step 101: Receive a handover request indication.

The step is specifically implemented as: receiving a handover request message sent by the source data gateway, and/or receiving a handover request instruction sent by the third-party management network element.

Step 102: Obtain an IP address assigned by the source data gateway to the user terminal according to the handover request indication, where the step is specifically implemented as: after receiving the handover request indication, notify the source data gateway to send the source data gateway as a location The IP address assigned by the user terminal is received, and the IP address sent by the source data gateway is received; and/or, after receiving the handover request indication, the IP address is obtained from the handover request indication.

Step 103: Establish a data connection tunnel of the IP address with the access node.

The step is specifically implemented as: sending a request for establishing a data connection tunnel to the access node; receiving a response of the access node to establish a data connection tunnel; or receiving a request for establishing a data connection tunnel sent by the access node; A response is sent to the access node to establish a data connection tunnel.

It can be seen from the foregoing embodiment of the present invention that, when receiving the handover request indication, the source data gateway obtains the IP address allocated by the source data gateway for the user terminal, and after the data gateway handover is completed, according to the IP obtained from the source data gateway. The address interacts with the user terminal. Therefore, before and after the data gateway is switched, the IP address of the user terminal does not change, and the upper layer service of the user terminal does not need to re-establish the session connection. Therefore, the application session of the application layer of the user terminal is also not interrupted, and the application of the user terminal is ensured. The continuity of the conversation. Embodiment 2

Referring to FIG. 2, FIG. 2 is a signaling flowchart of a method for implementing data gateway switching according to Embodiment 2 of the present invention, which includes the following steps:

Step 201: When the data gateway needs to migrate the data connection with the user terminal, the source data gateway sends a handover request message to the target data gateway. The step may also be performed by a third-party management network element. For example, the network management device sends an instruction to migrate part of the data connection to the source and destination data gateway according to the network status.

Step 202: The source data gateway establishes a data forwarding tunnel with the target data gateway.

It should be noted that, during the process of switching between the source data gateway and the target data gateway, a data forwarding tunnel may be established between the source data gateway and the target data gateway, so that in the process of switching the data gateway, when the target data gateway is When the packet data network has not been established as a connection, in the uplink data transmission, the target data gateway can forward the uplink data packet to the source data gateway through the forwarding tunnel, and the source data gateway sends the uplink data packet to the packet data network. In the downlink data transmission, the number of packets is forwarded to the target data gateway, and finally sent by the target data gateway to the user terminal through the access node. Therefore, the data forwarding tunnel between the source data gateway and the target data gateway can ensure that the service data is forwarded normally during the switching process of the data gateway, and is not lost due to the switching of the data gateway.

At the same time, the data connection tunnel can be a GTP (GPRS Tunneling Protocol) tunnel, a MIP (Mobile Internet Protocol) tunnel, a GRE (Generic Routing Encapsulation), and IPsec (IP Security). Protocol, IP Network Security Protocol) At least one of the tunnels.

Step 203: The target data gateway receives the data connection information sent by the source data gateway, and obtains an IP address allocated by the source data gateway for the terminal from the data connection information.

After receiving the handover request indication, the target data gateway receives the data connection information sent by the source data gateway, and obtains, from the data connection information, the IP address allocated by the source data gateway for the terminal. Alternatively, the target data gateway receives the handover request indication sent by the source data gateway, and obtains the data connection information directly from the handover request indication sent by the source data gateway, and obtains the IP address allocated by the source data gateway for the user terminal.

In this step, the data connection information sent by the source data gateway to the target data gateway includes the IP address information allocated by the active data gateway to the user terminal, so as to interact with the user terminal through the IP address after the data gateway handover is completed. In addition to the IP address of the user terminal, the user information, the accessed packet data network identifier, the data tunnel information, the QoS (Quality of Service) information, the charging information, the authentication and authorization information, and the like are also included.

The user information includes a user identifier and user subscription information, and the user identifier may be an IMSI. (International Mobile Subscriber Identity, NAI (Network Access Identifier) or MSISDN (Mobile Station International ISDN Number), user subscription information can be User profile or Subscription Data The IP address information of the user terminal includes the IP address, the IP address attribute, and the IP address lease. When the data gateway functions as a DHCP client or/and a DHCP server, the IP address information of the user terminal also includes the IP address and configuration information maintained by the DHCP. The data tunnel information varies according to the specific tunneling protocol, and generally includes: tunnel identifier, tunnel peer address information, tunnel encapsulation information, tunnel lifetime, and tunnel authentication information. The connection QoS information includes the service data stream transmitted with the data connection. Corresponding QoS, such as bandwidth, delay, packet loss rate, ToS (Type of Service service type), DSCP (Differentiated Services Code Point), QCI (QoS Class Identifier), etc. Fee information including data The charging information corresponding to the transmitted service data flow, for example, the time-based charging value, the flow-based fee, the pay-per-view value, etc.; the authentication and authorization information includes the data connection authentication and authorization information and the user's authentication and authorization information. .

Step 204: The target data sends a request message for establishing a data connection tunnel to the access node, requesting to establish a data connection tunnel.

The target data gateway obtains the address of the tunnel peer end, that is, the address of the access node, according to the data tunnel information in the data connection information, and sends a request message for establishing a data connection tunnel to the access node according to the address of the access node.

The access node updates the data connection tunnel with the source data gateway according to the request message for establishing the data connection tunnel, that is, establishes a data connection tunnel with the target data gateway. The establishment process varies depending on the data tunneling protocol. For example, for the GTP (GPRS Tunneling Protocol) protocol, the target data gateway sends a GTP bearer update message to the access node, and the access node updates the address information of the GTP tunnel endpoint and the TEID (Tunnel End Point Identifier). Establishing a GTP tunnel to the target data gateway; for the Proxy MIP (Proxy Mobile IP) protocol, the target data gateway sends a binding update message as a local mobility anchor to the access node as the mobile access gateway, the access node Update the binding entry information to establish a MIP tunnel to the target data gateway. For a GRE (Generic Routing Encapsulation) tunnel, the access node updates the GRE tunnel peer address and the tunnel identifier GRE key ID. For IPsec (IP Security Protocol) , IP network security protocol) tunnel, the access node establishes an IPsec tunnel to the target access gateway, Negotiate security parameters.

It should be noted that the present invention does not limit the tunnel type and the number of tunnels between the access node and the target data gateway, and may be a tunnel in the tunnel or a superposition of several tunnels in the tunnel. Can be in other tunnel forms.

Step 205: The access node sends a response message for establishing a data connection tunnel to the target data gateway, indicating that the data connection tunnel to the target data gateway is completed.

Step 206: The target data gateway registers its own identification information with the authentication server, indicating that the current data connection uses the registered target data gateway;

The step 206 may also be completed by the access node, and the access node registers the identifier information of the target data gateway with the authentication server. The authentication server may be an AAA server, a home subscriber server HSS, etc., and the authentication server stores the corresponding information of the user terminal and the currently used data gateway, that is, the anchor point. When the access network is switched, the target access network may obtain the user terminal from the authentication server. Data gateway information previously used.

Step 207: The target data gateway interacts with the policy decision entity to establish a policy control session for the data connection.

The policy decision entity first acquires current service data flow information of the IP address and policy control information under the source data gateway, and generates policy control information under the target data gateway according to the obtained service data flow information and policy control information. The policy control information under the source data gateway is used as the policy control information under the target data gateway, and then the generated policy control information is sent to the target data gateway.

When obtaining the current service data flow information and the policy control information under the source data gateway, the policy decision entity may obtain the data connection information provided by the target data gateway, for example, the UE ID, the PDN ID, or the UE IP, to obtain the source data gateway. The policy control session, the current service data flow information, and the policy control information under the source data gateway is obtained from the policy control session; or the target data gateway acquires the policy control session established on the source data gateway from the source data gateway. The information is identified, and the identification information of the policy control session is provided to the policy decision entity. The policy decision entity searches for the established policy control session according to the information, and obtains the current service data flow information and the policy control information under the source data gateway.

Step 208: The target data sends a handover complete message to the source data gateway, indicating that the access node The data connection tunnel has been established, and the data stream can be switched to the target gateway;

It should be noted that, after the target data gateway establishes a data connection tunnel with the access node, step 206, step 207 or step 208 may be performed. The present invention does not limit the order of execution of the above steps 206, 207, and 208. The order of execution of the three steps may be arbitrarily ordered, or three steps may be performed simultaneously.

Step 209: Release a policy control session between the source data gateway and the policy decision entity.

The step may be triggered by the source data gateway after the target data gateway connection has been established; or triggered by the policy decision entity establishing a policy control session with the target data gateway; or by the source data gateway after starting the data connection migration according to the timer Triggered after a proper delay.

Step 210: Release the data connection between the source data gateway and the access node.

It should be noted that in the present invention, the source data gateway can migrate data connections with one user terminal, and can also migrate multiple data connections with multiple user terminals. When migrating multiple data connections with multiple user terminals, the multiple data connections may be one address segment or one subnet, or multiple data connections may be migrated as a whole, and multiple data connections may be connected one by one. Independent migration.

In the foregoing embodiment, the migration process of describing a data connection is taken as an example. When multiple data connections are independently migrated, the foregoing steps may be repeatedly performed. When multiple data connections are migrated as a whole, steps 202, 203, and 208 may also be performed. In batch processing, a data forwarding tunnel may be established in step 202 for multiple data connections, or a data forwarding tunnel of each data connection may be established in batches; in step 203, when the data connection information is exchanged, the source data gateway may Sending a plurality of data connection information to be migrated to the target data gateway in a message; in step 208, when the handover instruction is exchanged, the target data gateway may indicate that the plurality of data connections are completed in one message.

In addition, when the source data gateway migrates the data connection with the user terminal, the source data gateway also needs to migrate the routing information with the packet data network. When a data connection is migrated, the routing information whose destination address is the IP address of the user terminal is changed, and the next hop gateway address in the routing information is changed to the target data gateway address, so that the target data gateway and the packet data network are established. Connection; When migrating multiple data connections of the same address segment or subnet, change the destination address to the network segment, that is, the routing information of the network address, subnet address, or network prefix, and put the next hop gateway in the routing information. The address is changed to the target data gateway address, so that a connection is established between the target data gateway and the message data network. Embodiment 3

Referring to FIG. 3, FIG. 3 is a signaling flowchart of a method for implementing data gateway switching according to Embodiment 3 of the present invention. This embodiment uses another signaling interaction mode to complete data gateway switching. The method includes the following steps:

Step 301: When the data gateway needs to migrate the data connection with the user terminal, the source data gateway sends a handover request message to the target data gateway.

Step 302: The source data gateway establishes a data forwarding tunnel with the target data gateway.

Step 303: The target data gateway receives the data connection information sent by the source data gateway, and obtains the IP address allocated by the source data gateway for the terminal from the data connection information.

Step 304: The source data gateway sends a handover request message to the access node to provide target data gateway information.

Step 305: The access node sends a request message for establishing a data connection tunnel to the target data gateway, requesting to establish a data connection tunnel.

The access node sends a request message for establishing a data connection tunnel to the target data gateway according to the target data gateway information provided by the source data gateway, and requests to establish a data connection tunnel with the target data gateway. The establishment process varies according to the data tunneling protocol. For example, for the GTP protocol, the access node sends the GTP bearer update information to the target data gateway, the access node updates the address information and TEID of the GTP tunnel endpoint, and establishes a GTP tunnel to the target data gateway; for the Proxy MIP protocol, the access node acts as a local The mobile anchor sends the binding update information to the target data gateway as the mobile access gateway, and the access node updates the binding entry information to establish a MIP tunnel to the target data gateway. For the GRE tunnel, the access node updates the GRE tunnel peer address. And the tunnel identifies the GRE key ID; for the IPsec tunnel, the access node establishes an IPsec tunnel to the target access gateway and negotiates security parameters.

Step 306: The target data gateway sends a response message for establishing a data connection tunnel to the access node, indicating that the data connection tunnel to the target data gateway is completed.

Step 307: The target data gateway interacts with the policy decision entity to establish a policy control of the data connection. Conversation

Step 308: The target data gateway registers its own identification information with the authentication server, indicating that the current data connection uses the registered target data gateway.

The step 306 can also be completed by the access node, and the access node registers the identifier information of the target data gateway with the authentication server.

Step 309: The access node sends a handover complete message to the source data gateway, indicating that the data connection tunnel with the access node has been established.

Step 310: After receiving the access node message, the source data gateway sends a handover complete message to the target data gateway.

Step 311: Release a policy control session between the source data gateway and the policy decision entity.

Step 312: Release the data connection between the source data gateway and the access node.

It should be noted that in the present invention, the source data gateway can migrate data connections with one user terminal, and can migrate multiple data connections with multiple user terminals. When migrating multiple data connections with multiple user terminals, the multiple data connections may be one address segment or one subnet, and multiple data connections may be migrated as a whole, or multiple data connections may be connected one by one. Independent migration.

In the foregoing embodiment, the migration process of describing a data connection is taken as an example. When multiple data connections are independently migrated, the foregoing steps may be repeatedly performed. When multiple data connections are migrated as a whole, steps 302, 303, and 310 may also be performed. In batch processing, a forwarding tunnel may be established in step 302 for multiple data connections, or a forwarding tunnel of each data connection may be established in batches; in step 303, when the data connection information is exchanged, the source data gateway may be in a Sending a plurality of data connection information to be migrated to the target data gateway in the message; In step 310, when the handover instruction is exchanged, the target data gateway may indicate that the plurality of data connections are completed in one message.

In addition, when the source data gateway migrates the data connection with the user terminal, the source data gateway also needs to migrate the routing information with the packet data network. When a data connection is migrated, the routing information whose destination address is the IP address of the user terminal is changed, and the next hop gateway address in the routing information is changed to the target data gateway address, so that the target data gateway and the packet data network are established. Connection; When migrating multiple data connections of the same address segment or subnet, change the destination address to the network segment, that is, the routing information of the network address, subnet address, or network prefix, and put the next hop gateway in the routing information. The address is changed to the target data gateway address, so that a connection is established between the target data gateway and the message data network. It should be noted that the present invention can be applied to a GPRS packet network, and the radio access network may specifically be a UTRAN (UMTS Terrestrial Radio Access Network) or a GERAN (GSM EDGE Radio Access Network). Wireless access network), E-UTRAN (Evolved UTRAN, next-generation UMTS terrestrial radio access network), WiMax (Worldwide Interoperability for Microwave Access), CDMA or WLAN, and other wireless technology access networks; The access node may be an SGSN (Serving GPRS Support Node), an MME (Mobility Management Entity) and a serving gateway, or an access gateway; the data gateway may be a packet data network gateway, a GGSN (Gateway) GPRS Support Node, GPRS Gateway Support Node), Mobile Anchor Point or HA (Home Agent); The policy decision entity can be a PCRF (Policy and Charging Rule Function) or PDF (Policy Decision) Function, policy decision function).

It can be seen from the foregoing embodiment of the present invention that after receiving the handover request message sent by the source data gateway, the source data gateway directly obtains the IP address allocated by the source data gateway for the user terminal, and after the data gateway is switched, according to the The IP address obtained by the source data gateway interacts with the user terminal. Therefore, before and after the data gateway, the IP address of the user terminal does not change, and the user terminal does not need to re-establish the session connection with the upper layer service. Therefore, the application session of the application layer of the user terminal is also not interrupted, and the user terminal is guaranteed. The continuity of the application session.

In addition, during the handover process, a data forwarding tunnel is established between the source data gateway and the target data gateway. When the target data gateway in the handover process has not established a connection with the packet data network, in the uplink data transmission, the target The data gateway can forward the uplink data packet to the source data gateway through the forwarding tunnel, and the uplink data packet between the source data gateway is sent to the packet data network; the downlink data transmission gateway forwards the packet to the target data gateway through the forwarding tunnel, and finally the target The data gateway is delivered to the user terminal through the access node. It ensures that the service data is normally communicated during the switching process of the data gateway, and will not be lost due to the switching of the data gateway. At the same time, the policy control function is added to control the quality and billing of service services, which improves the flexibility of the entire system application. Moreover, the data gateway identification information is updated, and the anchor information registered in the authentication server is updated. When the access network is switched, the target access network obtains the anchor information from the authentication server. The authentication server may specifically be an AAA server (Authentication, Authorization and Accounting), Home Subscriber Server (HSS), etc. Embodiment 4

Corresponding to the foregoing method for implementing a data gateway switching method, an embodiment of a device for implementing data gateway switching is also provided. Referring to FIG. 4, FIG. 4 is a data gateway switching according to Embodiment 4 of the present invention. The structure of the device includes a receiving unit 401, an IP address obtaining unit 402, and a first data connection tunnel establishing unit 403. The internal structure and the connection relationship are further described below in conjunction with the working principle of the device.

The receiving unit 401 is configured to receive a handover request indication.

The IP address obtaining unit 402 is configured to: according to the handover request, obtain an IP address that is obtained by the source data gateway for the user terminal;

The first data connection tunnel establishing unit 403 is configured to establish a data connection tunnel of the IP address with the access node.

The receiving unit 401 includes: a first receiving subunit 404, configured to receive a handover request message sent by a source data gateway; and/or a second receiving subunit 405, configured to receive a handover request command sent by a third-party management network element. .

The IP address obtaining unit 402 includes: an IP address first obtaining subunit 406, configured to notify the source data gateway to send an IP address allocated by the source data gateway to the user terminal according to the request indication, and receive the source data. An IP address sent by the gateway; and/or an IP address second obtaining subunit 407, configured to receive a handover request indication sent by the source data gateway, and obtain, by using the request indication, the source data gateway to be allocated to the user terminal IP address.

The first data connection tunnel establishing unit 403 includes: a first sending unit 408, configured to send a request for establishing a data connection tunnel to the access node; and a first receiving unit 409, configured to receive a data connection tunnel sent by the access node the response to. Alternatively, the second receiving unit first receives a request for establishing a data connection tunnel sent by the access node, and then sends a response to the access node to establish a data connection tunnel by using the second sending unit.

Further, the device may further include a second data connection tunnel establishing unit, configured to establish a data connection tunnel with the source data gateway after receiving the handover request indication sent by the source data gateway. Further, the device may further include a policy control information acquiring unit and an executing unit, where the policy control information acquiring unit is configured to acquire policy control information, and the executing unit is configured to use the policy control obtained by the policy control information acquiring unit Information, performing quality of service control and/or charging control on business data.

Further, the device further includes: a registration unit, configured to register its own data gateway identifier with the authentication server.

It can be seen from the foregoing embodiment of the present invention that, after receiving the handover request indication, the source data gateway directly obtains the IP address allocated by the source data gateway for the user terminal, and after the data gateway handover is completed, according to the obtained from the source data gateway. The IP address interacts with the user terminal. Therefore, before and after the data gateway, the IP address of the user terminal does not change, and the user terminal does not need to re-establish the session connection with the upper layer service. Therefore, the application session of the application layer of the user terminal is also not interrupted, and the user terminal is guaranteed. The continuity of the application session.

In a further solution, a forwarding tunnel is established between the source data gateway and the target data gateway. When the target data gateway in the handover process has not established a connection with the packet data network, in the uplink data transmission, the target data gateway The uplink data packet can be forwarded to the source data gateway through the forwarding tunnel, and the uplink data packet is sent from the source data gateway to the packet data network. In the downlink data transmission, the forwarding data is forwarded to the target data gateway, and finally, the target data is forwarded. The gateway is delivered to the user terminal through the access node. It ensures that the service data is normally communicated during the switching process of the data gateway, and will not be lost due to the switching of the data gateway. At the same time, the policy control function has been added to control the quality and accounting of business services, which improves the flexibility of the entire system application. And, updating the data gateway identification information, so that the authentication server authenticates the packet data forwarded by the target data gateway. Embodiment 5

The present invention also provides a system for implementing data gateway switching. Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a system for implementing data gateway switching according to Embodiment 5 of the present invention. The system includes: a source data gateway 501 and a target data gateway 502.

The source data gateway 501 is configured to send the IP address assigned to the user terminal to the target data gateway 502; The target data gateway 502 is configured to receive the handover request indication, obtain the IP address allocated by the source data gateway 501 for the user terminal from the source data gateway 501, and establish a data connection tunnel of the IP address with the access node.

The target data gateway 502 is further configured to establish a data forwarding tunnel with the source data gateway after receiving the handover request indication.

Further, the system further includes a policy decision entity 503, configured to acquire a policy control session of an IP address established with the source data gateway 501 and/or current service data flow information of the IP address, and control the session according to the policy. The information and/or service data flow information generates policy control information, and the target data gateway is further configured to acquire policy control information, and perform quality of service control and/or charging control on the service data according to the policy control information.

Further, the system further includes an authentication server 504, where the target data gateway is further configured to register its own data gateway identifier with the authentication server, where the authentication server is used to identify the target data gateway identifier of the target data gateway. Certify.

It can be seen from the foregoing embodiment of the present invention that after the target data gateway receives the handover request indication, the source data gateway directly obtains the IP address allocated by the source data gateway for the user terminal, and when the data gateway is completed, the target data gateway according to the slave The IP address obtained by the source data gateway interacts with the user terminal. Therefore, before and after the data gateway, the IP address of the user terminal does not change, and the user terminal does not need to re-establish the session connection with the upper layer service. Therefore, the application session of the application layer of the user terminal is also not interrupted, and the user terminal is guaranteed. The continuity of the application session.

In a further solution, in addition, during the handover process, a forwarding tunnel is established between the source data gateway and the target data gateway. When the target data gateway in the handover process and the packet data network have not established a connection, the uplink is performed. In the data transmission, the target data gateway can forward the uplink data packet to the source data gateway through the forwarding tunnel, and the uplink data packet between the source data gateway is sent to the packet data network; and then the source data gateway forwards the packet to the packet through the forwarding tunnel. The target data gateway is finally delivered by the target data gateway to the user terminal through the access node. It ensures that the service data is normally communicated during the switching process of the data gateway, and will not be lost due to the switching of the data gateway. At the same time, the policy control function is added to control the quality and billing of business services, which improves the flexibility of the entire system application.

One of ordinary skill in the art can understand all or part of the steps in the method of implementing the above embodiments. The program may be executed by instructing related hardware, and the program may be stored in a computer readable storage medium. The program includes the following steps: receiving a handover request indication; and obtaining the source data gateway according to the handover request indication An internet protocol IP address assigned by the user terminal; a data connection tunnel establishing the IP address with the access node. The storage medium is, for example, a ROM/RAM, a magnetic disk, an optical disk, or the like.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

Rights request

A method for implementing data gateway switching, the method comprising: receiving a handover request indication;

Obtaining, according to the handover request, an Internet Protocol IP address allocated by the source data gateway for the user terminal;

Establishing a data connection tunnel of the IP address with the access node.

The method according to claim 1, wherein the method further comprises: establishing a data forwarding tunnel with the source data gateway after receiving the handover request indication.

The method according to claim 2, wherein the establishing a data forwarding tunnel with the source data gateway comprises:

And establishing, by the source data gateway, at least one of a general packet radio service tunnel GTP tunnel, a mobile internet protocol MIP tunnel, a universal route encapsulation GRE tunnel, and an IP network security protocol IPsec tunnel.

The method according to claim 1, wherein the method further comprises: acquiring policy control information generated by the policy decision entity;

Based on the policy control information, quality of service control and/or charging control for the service data is performed.

The method according to claim 4, wherein the generating, by the policy decision entity, the policy control information comprises:

The policy decision entity acquires a policy control session of the IP address established with the source data gateway and/or current service data flow information of the IP address;

Generating the policy control information according to the acquired policy control session information and/or service data flow information.

6. The method according to claim 1, wherein the method further comprises: registering the data gateway identifier of the authentication server with the authentication server.

The method according to any one of claims 1-6, wherein the receiving the handover request indication comprises:

Receiving a handover request message sent by the source data gateway;

and / or, Receiving a handover request command sent by a third-party management network element.

The method according to any one of claims 1-6, wherein the obtaining an IP address allocated by the source data gateway for the user terminal according to the handover request indication comprises:

Receiving the handover request indication, informing the source data gateway to send an IP address allocated by the source data gateway to the user terminal, and receiving an IP address sent by the source data gateway;

and / or,

After receiving the handover request indication, the IP address is obtained from the handover request indication.

The method according to any one of claims 1-6, wherein the establishing a data connection tunnel with the access node comprises:

Sending a request to establish an data connection tunnel to the access node;

Receiving a response sent by the access node to establish a data connection tunnel;

Or,

Receiving a request for establishing a data connection tunnel sent by the access node;

A response is sent to the access node to establish a data connection tunnel.

An apparatus for implementing data gateway switching, where the apparatus includes: a receiving unit, configured to receive a handover request indication;

An IP address obtaining unit, configured to acquire, according to the switching request, an IP address allocated by the source data gateway for the user terminal;

And a data connection tunnel establishing unit, configured to establish a data connection tunnel of the IP address with the access node.

The device according to claim 10, wherein the device further comprises: a data forwarding tunnel establishing unit, configured to establish a data forwarding tunnel with the source data gateway after receiving the handover request indication.

The device according to claim 10, wherein the device further comprises: a policy control information acquiring unit, configured to acquire policy control information generated by a policy decision entity; and an execution unit, configured to control information according to the policy Obtaining the policy control information acquired by the unit, performing quality of service control and/or charging control on the service data.

The device according to claim 10, wherein the device further comprises: a registration unit, configured to register its own data gateway identifier with the authentication server.

The device according to any one of claims 10-13, wherein the receiving unit comprises:

a first receiving subunit, configured to receive a handover request message sent by the source data gateway;

and / or,

The second receiving subunit is configured to receive a handover request instruction sent by a third-party management network element.

The device according to any one of claims 10-13, wherein the IP address obtaining unit comprises:

And an IP address first obtaining subunit, configured to notify the source data gateway to send an IP address allocated by the source data gateway to the user terminal according to the request indication, and receive an IP address sent by the source data gateway;

and / or,

The IP address second obtaining sub-unit is configured to obtain, from the handover request indication sent by the source data gateway, the IP address allocated by the source data gateway to the user terminal.

The device according to any one of claims 10-13, wherein the data connection tunnel establishing unit comprises:

a first sending unit, configured to send a request for establishing a data connection tunnel to the access node, where the first receiving unit is configured to receive a response that is established by the access node to establish a data connection tunnel.

a second receiving unit, configured to receive a request for establishing a data connection tunnel sent by the access node, and a second sending unit, configured to send, to the access node, a response for establishing a data connection tunnel.

A system for implementing data gateway switching, the system comprising: a source data gateway, configured to send an IP address assigned to a user terminal to the target data gateway; and a target data gateway, configured to receive a handover The request indication is obtained, and the IP address assigned by the source data gateway to the user terminal is obtained from the source data gateway, and a data connection tunnel is established with the access node.

The system according to claim 18, wherein the target data gateway is further configured to establish a data forwarding tunnel with the source data gateway after receiving the handover request indication.

The system according to claim 18, wherein the system further comprises a policy decision entity, and the policy decision entity is configured to acquire an IP address established by the source data gateway. Controlling the current service data flow information of the session and/or the IP address, generating policy control information according to the policy control session information and/or service data flow information, where the target data gateway is further configured to acquire policy control information, according to The policy control information performs quality of service control and/or charging control on the service data.

The system according to claim 18, wherein the system further comprises an authentication server, wherein the target data gateway is further configured to register its own data gateway identifier with the authentication server, where the authentication server is configured to The target data gateway identifier registered by the target data gateway is authenticated.