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Overhead reduction in system for intermittent transmission

  • US 6,925,105 B1
  • Filed: 05/01/2000
  • Issued: 08/02/2005
  • Est. Priority Date: 05/01/2000
  • Status: Expired due to Fees
First Claim
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1. A system comprising:

  • a plurality of transmitters each of which, when operative, transmits independently of any other of said plurality of transmitters and independently of any equipment for receiving from any of said plurality of transmitters, and includes, in transmitters, less than an entire transmitter identification; and

    a receiver for;

    (a) holding, simultaneously for each plurality of transmitters, data indicative of an expected time and an expected frequency of at least one future transmission, wherein each said plurality of transmission is transmitted by different one of said plurality of transmitters, and wherein, transmission frequency and time between transmission are controlled according to a time-frequency pattern that is different for each of said plurality of transmitters; and

    (b) identifying at least one of said plurality of transmitters based on said time-frequency pattern.

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