Selective updating of compression dictionary

Details Selective updating of compression dictionary Selective updating of compression dictionary

2008-03-25

2008-03-25

Nguyen, Linh (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Coding by table look-up techniques

C341S060000, C341S107000

Reexamination Certificate

active

10974033

ABSTRACT:
A telecommunications network comprises a sending entity (22) and a receiving entity (24) which communicate over a radio interface (26). The sending entity (22) comprises a compressor (40) and a message formatter (34). The compressor (40) in turn comprises a sending entity compression dictionary (60) and dictionary update decision logic (62). The compressor (40) compresses a message to obtain a compressed message to be sent over the radio interface (26) to the receiving entity (24) and also determines a compression factor for the message. The compression factor is based on similarity of the message to contents of the sending entity compression dictionary. The dictionary update decision logic (62) makes a decision whether the compression factor justifies updating of a receiving entity decompression dictionary (70). The message formatter (34) includes, in the compressed message, an update indication regarding the decision. The receiving entity (24) has a decompressor (50) which comprises the receiving entity decompression dictionary (70) and decompression dictionary update determination logic (72). The decompressor (50) decompresses the compressed message to obtain a decompressed message. The decompression dictionary update determination logic (72) uses the update indication to ascertain whether to use the decompressed message to update the receiving entity decompression dictionary (70). In one example illustrative embodiment, the compressor (40) uses a SigComp compression scheme to compress the message to obtain the compressed message, and the message formatter (34) sets a bit flag in a SigComp portion of the compressed message as the update indication.

REFERENCES:
patent: 5617552 (1997-04-01), Garber et al.
patent: 6121903 (2000-09-01), Kalkstein
patent: 6414610 (2002-07-01), Smith
patent: 6597812 (2003-07-01), Fallon et al.
patent: 6643815 (2003-11-01), Davis et al.
patent: 6707400 (2004-03-01), Christofferson et al.
patent: 6883035 (2005-04-01), Hannu et al.
patent: 2002/0057715 (2002-05-01), Hannu et al.
patent: 2002/0058501 (2002-05-01), Hannu et al.
patent: 2002/0059462 (2002-05-01), Hannu et al.
patent: 2003/0025621 (2003-02-01), Christoffersson et al.
patent: 2003/0030575 (2003-02-01), Frachtenberg et al.
patent: 2003/0179114 (2003-09-01), Kampf
patent: 2004/0008650 (2004-01-01), Le et al.
patent: 2004/0047301 (2004-03-01), Poikselka et al.
patent: 2004/0059835 (2004-03-01), Liu et al.
patent: 2007/0150497 (2007-06-01), De La Cruz et al.
patent: 1 376 878 (2004-01-01), None
Nordberg et al, “Improving SigComp Performance Through Extended Operations”, Vehicular Technology Conference, 2003, VTC 2003-Fall, IEEE 58thOct. 6-9, 2003, vol. 5, pp. 3425-3428.
International Search Report mailed May 11, 2005 in corresponding PCT application No. PCT/SE2005/000122.
Price et al, Signalling Compression (SigComp), RFC 3320, Network Working Group, Jan 2003.
Tech Spec., 3rdGeneration Partnership Project; Tech. Spec. Group Services and Systems Aspects; Network Architecture (Release 5), 3GPP TS 23.002, V5.12.0 (Sep. 2003).
Tech Spec., 3rdGeneration Partnership Project; Tech. Spec. Group Services and Systems Aspects; IP Multimedia Subsystems (IMS); Stage 2 (Release 6), 3GPP TS 23.228 V6.7.0 (Sep. 2004).
OMA PoC User Plane, OMA-UP-POC=V0—1-20041005-D,Draft Version 1.0.9 Oct. 2004.

Affiliated with

Also associated with

Rating

Selective updating of compression dictionary does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Selective updating of compression dictionary, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selective updating of compression dictionary will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3955857