Internet Protocol Version 4 Support for Proxy Mobile Internet Protocol Version 6 Route Optimization Protocol

• US 20090122750A1
• Filed: 11/10/2008
• Published: 05/14/2009
• Est. Priority Date: 11/12/2007
• Status: Active Grant

• Current Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Inventors: Sarikaya, Behcet
• Granted Patent: US 8,228,843 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• 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 80/045 involving different protocol versions, e.g. MIPv4 and MIPv6

Abstract

A network component comprising at least one processor configured to implement a method comprising promoting an optimization of a communications route associated with a mobile node (MN) and a correspondent node (CN) using Internet Protocol version 4 (IPv4) packets is disclosed. Also disclosed is a network comprising a mobility access gateway (MAG) in communication with a MN, and a CN in communication with the MAG and that desires to communicate with the MN, wherein a communications route between the MN and the CN is optimized using IPv4 signaling. Included is a method comprising promoting an optimization of a communications route between a MN and a CN using IPv4 signaling. Standalone CNs and CNs under a MAG embodiments are supported.

Claims

1. A network component comprising:

at least one processor configured to implement a method comprising;

promoting an optimization of a communications route associated with a mobile node (MN) and a correspondent node (CN) using Internet Protocol version 4 packets.

2. The network component of claim 1, wherein the CN is served by a mobility access gateway.

3. The network component of claim 1, wherein the CN is not served by a mobility access gateway.

4. The network component of claim 1, wherein the route is optimized without signaling the MN.

5. The network component of claim 1, wherein the optimization comprises a proxy home test procedure.

6. The network component of claim 1, wherein the optimization comprises a proxy care-of test (PCoT) procedure.

7. The network component of claim 6, wherein the optimization comprises a proxy home test (PHoT) procedure that is implemented substantially simultaneous with the PCoT procedure.

8. The network component of claim 7, wherein the PHoT produces a permanent home keygen token and the PCoT produces a care-of keygen token, and wherein the PCoT creates a temporary home keygen token when the permanent home keygen token in unavailable.

9. A network comprising:

a mobility access gateway (MAG) in communication with a mobile node (MN); and

a correspondent node (CN) in communication with the MAG and that desires to communicate with the MN,

wherein a communications route between the MN and the CN is optimized using Internet Protocol version 4 (IPv4) signaling.

10. The network of claim 9, wherein the IPv4 signaling comprises a proxy care-of test (PCoT) procedure comprising an early proxy binding update (PBU) message and a proxy binding acknowledgment (PBAck) message.

11. The network of claim 10, wherein the early PBU message comprises a PCoT init option and the PBAck message comprises a PCoT option.

12. The network of claim 11, wherein the PCoT procedure further comprises a complete PBU message and a second PBAck message comprising a home keygen token.

13. The network of claim 9, wherein the IPv4 signaling further comprises a proxy home test (PHoT) procedure.

14. The network of claim 13, wherein the PHoT procedure comprises a PHoT Init (PHoTI) message and a PHoT message.

15. The network of claim 14, wherein the PHoTI message comprises a home init cookie, a care-of address (CoA), and an IPv4 home address.

16. The network of claim 14, wherein the PHoT message comprises a home nonce index, a home init cookie, a care-of address (CoA), and an IPv4 home address.

17. The network of claim 13 further comprising:

a first local mobility anchor (LMA) in communication with the MAG and the CN;

a second LMA in communication with the LMA; and

a second MAG in communication with the CN and the second LMA,

wherein the LMA and the MAG are associated with the MN,

wherein the second LMA and the second MAG are associated with the CN,

wherein the MAG, the first LMA, the second LMA, and the second MAG participate in the PHoT procedure, and

wherein the first LMA and the second LMA do not participate in the PCoT procedure.

18. A method comprising:

promoting an optimization of a communications route between a mobile node (MN) and a correspondent node using Internet Protocol version 4 (IPv4) signaling.

19. The method of claim 18, wherein the optimization is promoted in response to a handover between two mobility access gateways.

20. The method of claim 19 further comprising:

receiving at a first mobility access gateway (MAG) a handover context message from a second mobility access gateway (MAG) or a local mobility anchor,

wherein the handover context message comprises an IPv4 MN home address, an IPv4 address for each correspondent node (CN) with which the MN has existing optimized routes, and an IPv4 proxy care-of address for any MAGs associated with the existing optimized routes.