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Method for collision avoidance in an asynchronous communication system

  • US 6,608,821 B1
  • Filed: 11/20/1998
  • Issued: 08/19/2003
  • Est. Priority Date: 11/20/1998
  • Status: Expired due to Term
First Claim
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1. A method of transmitting a message in a communications system comprising a plurality of transmitters and at least one receiver, each said transmitter including means for initiating and transmitting a message to said at least one receiver, said method comprising the steps of:

  • transmitting said message a predetermined number of times N, each message transmission occurring during a time slot within a burst of N time slots;

    dividing each time slot into a plurality of M sub time slots;

    randomly selecting one of said M sub time slots in which to transmit said message such that the time delay between successive transmissions during each time slot is random;

    transmitting said message during said randomly selected sub time slot;

    wherein each transmitter transmits messages asynchronously with respect to and independently of transmissions from all other transmitters;

    wherein burst time slot timing for each message is determined independently by each transmitter asynchronous to other transmitters and without the use of any system time slot synchronization; and

    wherein N and M are positive integers and M is equal to or greater than 2.

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