Scrambler initialization in a wireless local area network

Details Scrambler initialization in a wireless local area network Scrambler initialization in a wireless local area network

2008-01-08

2008-01-08

Yao, Kwang Bin (Department: 2616)

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

C370S471000, C370S473000, C370S476000

Reexamination Certificate

active

10447626

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.

REFERENCES:
patent: 5621799 (1997-04-01), Katta et al.
patent: 6349138 (2002-02-01), Doshi et al.
patent: 2002/0138721 (2002-09-01), Kwon et al.
patent: 2003/0023915 (2003-01-01), Choi
patent: 2003/0145196 (2003-07-01), Heegard et al.
patent: 2003/0231658 (2003-12-01), Liang et al.

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