Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2007-05-08
2007-05-08
Ngo, Ricky Q. (Department: 2663)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S431000, C370S464000, C709S223000
Reexamination Certificate
active
09998715
ABSTRACT:
Compression of inner headers of IPSec tunnel packets is achieved by storing an inner IP header and an inner protocol header in a context sub-table associated with the security association database entry at a destination tunnel device. IPSec tunnel packets having compressed inner headers may be identified by the LSBs of the SPI number in the IPSec header. The SPI number may also identify whether the IPSec tunnel packet is a TCP packet. A portion of padding in the encapsulated portion may identify a particular context sub-table used for decompressing the inner headers. The context sub-table may be updated as portions of the inner headers change.
REFERENCES:
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Casner, S.L., et al., “Compressing IP/UDP/RTP Headers for Low-Speed Serial Links”,RFC 2508 Network Working Group, 1-19, (Feb. 1999).
Degermark, M., et al., “IP Header Compression”,RFC 2507, 1-36, (Feb. 1999).
Jacobson, V., “Compressing TCP/IP Headers for Low-Speed Serial Links”,RFC 1144 by Network Working Group, 1-39, (Feb. 1990).
Kent, S., et al., “IP Authentication Header”,RFC 2402 by Network Working Group, 1-17, (Nov. 1998).
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Kent, S., et al., “Security Architecture for the Internet Protocol”,RFC 2401 by Network Working Group, 1-51, (Nov. 1998).
Chang Richard
Corrent Corporation
Ingrassia Fisher & Lorenz
Ngo Ricky Q.
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