Packet header compression using division remainders
CA 2388362 C · Owner: Einarsson, Torbjorn · Inventors: Einarsson, Torbjorn; Svanbro, Krister
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to providing a method and apparatus for efficiently compressing and reconstructing a header of a real time communication packet. In a header compressor (28) a header field value is , applied to a modulo X operator (101) which can for example, divide the header , field value by a value X and output the remainder. Optionally, a checksum (38) may be appended to the remainder. The header field value may be scaled (35) prior to being applied to the modulo X operator (101). The compressed header field which is output from the header compressor (28) includes the remainder with or without the checksum appended. A header decompressor (53) includes a field …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 8, 2000 and granted January 11, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.