Collision detection using code rule violations of the manchester code
CA 2067354 C · Owner: Heegard, Chris · Inventors: Heegard, Chris
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A collision detection method and apparatus (10) is disclosed for detecting code rule violations in Manchester encoded data packets. The signals .delta.0 - S2n - S2n-1 $(25,n, .delta.2 = S2n+1 - S2n-1, .sigma.0 = S2n + S2n-1 are determined at time nT where S2n-1 and S2n are the Manchester code bit pair representative of the nth bit in a data stream having a bit period T. Processing of these signals permits the detection of most collisions since the Manchester coding rules are violated more than half the time in the signal formed by the colliding packets. To ensure 100 collision detection, a preamble using an intentional violation of the Manchester code in the pattern 10 11 01 10 is …
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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 October 2, 1990 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2012.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.