Performance for integrated home agent and foreign agent

Details Performance for integrated home agent and foreign agent Performance for integrated home agent and foreign agent

2007-04-17

2007-04-17

Pham, Chi (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S349000, C370S389000

Reexamination Certificate

active

10187229

ABSTRACT:
A method for correctly routing packets is described. The method includes receiving an encapsulated packet from a sending mobile node destined for a receiving mobile node. The method determines whether the encapsulated packet is from a mobile node with the recipient as its home agent (reverse tunneled packet), whether the inner packet is destined to a mobile node with the recipient as its foreign agent, and whether the packet had been received in a previous reception. If the answers for all the three are yes, the packet is then delivered to the receiving mobile node. If the answers are yes only for the first two questions, the packet is routed and transmitted away normally and a copy of the packet IP header is cached locally. For all other cases, the packet is routed and transmitted away normally.

REFERENCES:
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patent: 2002/0009066 (2002-01-01), Shimizu et al.
patent: 2003/0053453 (2003-03-01), Ono et al.
Montenegro, G. (Sun Microsystems, Inc.); “Reverse Tunneling for Mobile IP, revised”; http://www.ietf.org/rfc/rfc3024.txt?number=3024; Jan. 2001; (29 pages).
Perkins, C. (Nokia Research Center); “IP Mobility Support for IPv4”; http://www.ietf.org/rfc/rfc3220.txt?number=3220; Jan. 2002; (92 pages).
Perkins, C. (IBM); “IP Encapsulation within IP”; http://www.ietf.org/rfc/rfc2003.txt?number=2003; Oct. 1996; (14 pages).

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