Scheme, apparatus, and program for header compression

Details Scheme, apparatus, and program for header compression Scheme, apparatus, and program for header compression

2006-04-04

2006-04-04

Harrell, Robert B. (Department: 2142)

Electrical computers and digital processing systems: multicomput

Computer-to-computer data modifying

Compressing/decompressing

Reexamination Certificate

active

07024490

ABSTRACT:
A transmission end (header compression end) and a reception end (header decompression end) share the same timestamp calculation information which is previously prepared. At the transmission end, in the case that the timestamp of the current packet to be subjected to header compression cannot be compressed with the current timestamp calculation information, the history record which covers timestamp calculation information previously transmitted is referred to for determining whether to transmit a packet header carrying the timestamp without updating the current timestamp calculation information, or a packet header carrying the timestamp by updating the current timestamp calculation information.

REFERENCES:
patent: 0 832 536 (2000-06-01), None
Carsten Burmeister: “[ROHC] Small Changes in Keyword-Cutouts”, IETF Discussion Forum, ‘Online’, Jun. 27, 2000, XP002288034.
Anton Martensson, Torbjorn Einarsson, Lars-Erik Jonsson: “ROCCO Conversational Video Profiles” Internet-Draft, Draft-IETF-ROHC-RIP-ROCCO-Video-00, Online, May 24, 2000, XP002288035.
Akihiro Miyazaki, Hideaki Fukushima, Thomas Wiebke, Rolf Hakenberg, Carsten Burmeister: “Robust Header Compression Using Keyword-Packets”, Internet Draft, Draft-Miyazaki-ROHC-KWHC-00, Online Mar. 1, 2000, XP002288036.
Carsten Burmeister et al., “Robust Header Compression (ROHC): Framework and Four Profiles: RTP, UDP, ESP, and Uncompressed <draft -ietf-rohc-rtp-09.txt>” IETF, Feb. 26, 2001.

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