Scrambler initialization in a wireless local area network
US7317735B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 2003 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | Mar 15, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0061
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system of the present invention includes the creation and transmission of a MAC header that includes a first MAC header portion and at least two scrambler recovery fields arranged on the two sides (before and after) of a header FEC portion. The invention includes determining whether a scrambler initialization field received at the physical layer was received in error, and if so, evaluating either one of the de-scrambled values of the two scrambler recovery fields in relation to a table to determine a pseudorandom sequence initialization value that corresponds to a given de-scrambled scrambler recovery field value. Once the corresponding pseudorandom sequence initialization value is determined, that value may be used to further de-scramble the data in the data frame to produce a correctly de-scrambled data frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.