Method of determining a collision between a plurality of...

Details Method of determining a collision between a plurality of... Method of determining a collision between a plurality of...

2005-05-24

2005-05-24

Pham, Chi (Department: 2667)

Multiplex communications

Channel assignment techniques

Carrier sense multiple access

C370S462000

Reexamination Certificate

active

06898204

ABSTRACT:
A method of determining a collision between two or more transmitting stations at one of the transmitting stations on a frame-based communications network. A transmitted frame header includes a cyclic preamble wherein identical copies of a preamble symbol sequence are transmitted sequentially. A collision is declared if an estimate of error power in second and third copies of the preamble minus an estimate of error power in third and fourth copies of the preamble exceeds a first threshold, or a maximum value of the norm of each term of a source field error vector minus a greater of the estimate of the error power in the second and third copies of the cyclic preamble and the estimate of the error power in the third and fourth copies of the preamble exceeds a second threshold.

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patent: WO 9920016 (1999-04-01), None
J. Carlson, et al. “PPP Over Simple Data Link (SDL) using SONET/SDH with ATM-like framing,”Internet Draft,Nov. 1998, pp. 1-21.

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