METHOD AND SYSTEM FOR NEGOTIATING INTERFACE DATA PATH ESTABLISHMENT

• US 20080104192A1
• Filed: 01/07/2008
• Published: 05/01/2008
• Est. Priority Date: 07/11/2005
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wu, Jianjun, Xie, Yong
• Granted Patent: US 7,882,266 B2
• Time in Patent Office: Days
• US Class Current: 709/212
• CPC Class Codes: H04W 36/0033 with transfer of context information
• CPC Class Codes: H04W 88/16 Gateway arrangements
• CPC Class Codes: H04W 92/24 between backbone network devices

Abstract

A method and system for negotiating interface data path establishment is provided in the invention, including: making a decision, by Target ASN-GW, on whether to establish an R4 data path or an redirect R3 data path, and sending a corresponding request to the Anchor ASN-GW according to the decision; and determining a negotiation result, by the Anchor ASN-GW, according to the corresponding request from the Target ASN-GW, or the corresponding request from the Target ASN-GW and a local decision, and returning a reply to the Target ASN-GW according to the negotiation result. In this way, the R3 data path is redirected if either the Target ASN-GW or the Anchor ASN-GW determines to redirect the R3 data path; and an R4 data path is established only if both the Target ASN-GW and the Anchor ASN-GW determine to establish the R4 data path.

Claims

1. A method for negotiating interface data path establishment, comprising:

making a decision, by a Target ASN-GW for an MSS/SS, on whether to establish an R4 data path or redirect an R3 data path at an Anchor ASN-GW for the MSS/SS, and sending a corresponding request to the Anchor ASN-GW according to the decision; and

determining a negotiation result, by the Anchor ASN-GW, according to the corresponding request from the Target ASN-GW, or the corresponding request from the Target ASN-GW and a local decision, and returning a reply to the Target ASN-GW according to the negotiation result.

2. The method according to claim 1, wherein the determining a negotiation result by the Anchor ASN-GW comprises:

determining, by the Anchor ASN-GW, the negotiation result as establishing an R4 data path if both the request from the Target ASN-GW and the local decision instruct to establish an R4 data path;

determining directly, by the Anchor ASN-GW, the negotiation result as redirecting an R3 data path if the request from the Target ASN-GW instructs to redirect an R3 data path; and

determining, by the Anchor AS N-GW, the negotiation result as redirecting an R3 data path if the request from the Target ASN-GW instructs to establish an R4 data path, but the local decision instructs to redirect an R3 data path.

3. The method according to claim 2, if the negotiation result determined by the Anchor ASN-GW instructs to redirect the R3 data path, the method further comprising:

returning, by the Anchor ASN-GW, a message containing relevant information required to redirect the R3 data path to the Target ASN-GW;

triggering, by the Target ASN-GW, an MIP registration initiated to the Home Agent (HA), according to the message returned; and

returning, by the Target ASN-GW, a message containing the information on the R3 data path redirection result to the Anchor ASN-GW, to notify the Anchor ASN-GW of the R3 data path redirection result.

4. The method according to claim 3, wherein, the information required to redirect the R3 data path comprises context information required to redirect the R3 data path, where the context information comprises Anchor DPF Info, and/or Anchor SFA Info, and/or Anchor DHCP Proxy or Relay Info, and/or Anchor Accounting Client Info.

5. The method according to claim 3, wherein, the message containing the relevant information required to redirect the R3 data path returned from the Anchor ASN-GW to the Target ASN-GW is a message provided with R3 redirection indication information, and also with an extended information field for carrying the relevant information required to redirect the R3 data path.

6. The method according to claim 2, if the negotiation result determined by the Anchor ASN-GW instructs to establish an R4 data path, the method further comprising:

establishing, by the Anchor ASN-GW, an R4 data path, and returning an R4 data path establishment request message to the Target ASN-GW; and

establishing, by the Target ASN-GW, an R4 data path according to the message returned, and returning an acknowledgement message of the R4 data path establishment to the Anchor ASN-GW.

7. The method according to claim 3, wherein, if the request from the Target ASN-GW instructs to redirect the R3 data path, then identification information of the relevant information required to redirect the R3 data path and to be returned from the Anchor ASN-GW is carried in a message of the request;

and the Anchor ASN-GW returns the relevant information corresponding to the identification information to the Target ASN-GW.

8. The method according to claim 1, wherein, the Target ASN-GW and/or the Anchor ASN-GW make a decision on whether to establish an R4 data path or redirect an R3 data path, according to current service policy for the MSS/SS and current conditions of network resources.

9. The method according to claim 8, wherein, the Target ASN-GW and/or the Anchor ASN-GW choose in precedence to establish an R4 data path in making the decision.

10. A system for negotiating interface data path establishment, comprising a Target ASN-GW and an Anchor ASN-GW for an MSS/SS, wherein:

the Target ASN-GW comprises a decision making module adapted for deciding whether to establish an R4 data path or redirect an R3 data path at the Anchor ASN-GW for the MSS/SS, and sending a corresponding request to the Anchor ASN-GW according to the decision; and

the Anchor ASN-GW comprises a determining module adapted for determining a negotiation result according to the corresponding request from the Target ASN-GW, or the corresponding request from the Target ASN-GW and a local decision, and returning a reply to the Target ASN-GW according to the negotiation result.

11. The system according to claim 10, wherein, the Anchor ASN-GW further comprises:

a storage module connected to the determining module and adapted for storing determining criteria comprising;

if both the request from the Target ASN-GW and the local decision instruct to establish an R4 data path, the Anchor ASN-GW determining the negotiation result as establishing an R4 data path;

if the request from the Target ASN-GW instructs to redirect an R3 data path, the Anchor ASN-GW determining directly the negotiation result as redirecting an R3 data path; and

if the request from the Target ASN-GW instructs to establish an R4 data path, but the local decision instructs to redirect an R3 data path, the Anchor AS N-GW determining the negotiation result as redirecting an R3 data path.