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TDMA network and protocol for reader-transponder communications and method

  • US 5,425,032 A
  • Filed: 02/10/1994
  • Issued: 06/13/1995
  • Est. Priority Date: 04/07/1992
  • Status: Expired due to Fees
First Claim
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1. A receiver for a TDMA communications network comprising:

  • means for receiving and transforming radiated energy to a first RF signal;

    means for demodulating and converting said first RF signal to a digital signal; and

    logic means for decoding said digital signal and for executing a protocol, said protocol comprising a plurality of short, randomly selected activation time slots used only to gain admission to said TDMA network and wherein said randomly selected activation time slots are not used for communication of data messages, and a plurality of message time slots to transmit data messages during communications over said TDMA network, said message time slots being assigned to particular user transponders in response to user transponder identification signals received during said activation time slots, said message time slots being relatively long in relation to said activation time slots, and wherein said message slots cannot be used to gain admission to said TDMA network.

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