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System and method of bidirectional digital video communication over a cable

  • US 6,237,146 B1
  • Filed: 03/19/1997
  • Issued: 05/22/2001
  • Est. Priority Date: 03/19/1997
  • Status: Expired due to Fees
First Claim
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1. A method of bidirectional digital communication over cable comprising the step of:

  • receiving, in response to an initialization signal, within each of a plurality of different subscriber digital video home terminals located at different subscriber locations and in communication with a cable headend a randomized back-off array for controlling when a subscriber digital video home terminal attempts to send a message to the cable headend and then reattempts to send the message a plurality of times after a random back-off interval of time has passed after each reattempt until no collision would occur with another message generated from another subscriber home terminal, the randomized back-off array being generated at the cable headend with a two-stage back-off retry algorithm.

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