Proxy mobility optimization

• US 8,102,815 B2
• Filed: 07/12/2007
• Issued: 01/24/2012
• Est. Priority Date: 07/12/2007
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Krishnan, Suresh
• Primary Examiner(s): Moore, Jr., Michael J
• Application Number:
  US11/776,822
• Publication Number:
  US 20090016364A1
• Time in Patent Office: 1,657 Days
• Field of Search: 709/245, 709/203, 370/331, 370/390, 370/328, 370/310, 370/338, 455/90.2, 455/405, 455/406
• US Class Current: 370/331
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 8/082 for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 88/182 Network node acting on behalf of an other network entity, e.g. proxy

Abstract

Systems and methods are described which provide communication between a correspondent node and a mobile node including receiving a home prefix of the mobile node and a list of correspondent nodes by a mobile access gateway having an access link with the mobile node and submitting proxy binding update messages by the mobile access gateway to a home agent corresponding to the mobile node and to each of the correspondent nodes in the list.

Claims

1. A method for communicating data between a correspondent node and a mobile node, the method comprising:

receiving a home network prefix of the mobile node and a list of correspondent nodes by a mobile access gateway having an access link with the mobile node; and

submitting proxy binding update messages by the mobile access gateway to a home agent corresponding to the mobile node and to each of the correspondent nodes in the list, thereby creating a traffic path, between one of the correspondent nodes of the list and the mobile node, which goes through the mobile access gateway but bypasses the home agent.

2. The method of claim 1, wherein the list includes correspondent nodes having current sessions with the mobile node.

3. The method of claim 1, wherein an authenticating server receives a mobile node identifier and the list of correspondent nodes from the mobile node.

4. The method of claim 3, wherein the authenticating server submits a home prefix of the mobile node to the mobile access gateway.

5. The method of claim 1, wherein the home network prefix is received from a local mobility anchor.

6. The method of claim 1, wherein the proxy binding update message includes the mobile access gateway address as the care of address for the mobile node.

7. The method of claim 6, wherein the home agent and each of the correspondent nodes on the list submit a proxy binding acknowledgement to the mobile access gateway.

8. The method of claim 7, wherein data packets from one of the correspondent nodes are submitted to the mobile node via the mobile access gateway bypassing the home agent.

9. The method of claim 1, wherein the mobile access gateway performs mobility related signaling on behalf of the mobile node attached to the mobile access gateway on an access link.

10. The method of claim 9, wherein the signaling is performed by a proxy mobile agent functionality included in the mobile access gateway.

11. The method of claim 1, wherein the mobile access gateway is an access router.

12. A network node for providing a data link between a correspondent node and a mobile node, the network node comprising:

a processor in communication with a memory unit;

wherein the processor receives a home prefix of the mobile node and a list of correspondent nodes having current sessions with the mobile node; and

submits proxy binding update messages to a home agent corresponding to the mobile node and to each of the correspondent nodes in the list wherein the mobile node has an access link to the network node, thereby creating a data traffic path, between one of the correspondent nodes of the list and the mobile node, which goes through the mobile access gateway but bypasses the home agent.

13. The network node of claim 12, wherein the processor further receives proxy binding acknowledgements from the home agent and each of the correspondent nodes.

14. The network node of claim 13, wherein the processor further receives data packets from at least one correspondent node in the list and forwards the data packets to the mobile node.

15. The network node of claim 13, wherein the processor further receives data packets from the mobile node and forwards the data packets to at least one correspondent node in the list.

16. The network node of claim 12, wherein the processor performs mobility related signaling on behalf of the mobile node.

17. The network node of claim 12, wherein the home network prefix of the mobile node is received from an Authentication Authorization Accounting (AAA) server.

18. The network node of claim 12, wherein the home network prefix of the mobile node is received from a local mobility anchor (LMA).

19. A mobile node comprising:

a processor in communications with a memory unit;

wherein the processor transmits identification of the mobile node and identification of a plurality of correspondent nodes currently having sessions with the mobile node to make available a home network prefix of the mobile node and the identity of the plurality of correspondent nodes to a mobile access gateway having an access link with the mobile node, thereby creating a data traffic path, between one of the plurality of correspondent nodes and the mobile node, which goes through the mobile access gateway but bypasses a home agent corresponding to the mobile node.

20. The mobile node of claim 19, wherein the home network prefix is provided by a local mobility anchor to the mobile access gateway.

21. The mobile node of claim 19, wherein the processor transmits identification of the mobile node and identification of the plurality of correspondent nodes to an authenticating server.

22. The mobile node of claim 21, wherein the authenticating server provides the home network prefix of the mobile node and the identity of the plurality of correspondent nodes to the mobile access gateway.

23. The mobile node of claim 19, wherein the processor further transmits data packets to the mobile access gateway for submission to at least one of the correspondent nodes.

24. A correspondent node comprising:

a processor in communications with a memory unit;

wherein the processor, upon receiving a proxy binding update from a mobile access gateway, submits a proxy binding acknowledgement to the mobile access gateway, wherein the mobile access gateway has an access link to a mobile node, thereby creating a data traffic path, between the correspondent node and the mobile node, which goes through the mobile access gateway but bypasses a home agent corresponding to the mobile node.

25. The correspondent node of claim 24, further comprising a binding cache wherein the cache includes a binding record between a home address of the mobile node and an address of the mobile access gateway.

26. The correspondent node of claim 25, wherein the processor further transmits data packets to the mobile access gateway using the address of the mobile access gateway from the binding cache for submission to the mobile node.