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Time division multiplexed selective call system

  • US 5,168,493 A
  • Filed: 11/08/1991
  • Issued: 12/01/1992
  • Est. Priority Date: 01/02/1990
  • Status: Expired due to Term
First Claim
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1. In a selective call system, a method for generating and transmitting a signal comprising a plurality of phases at a baud rate comprising the steps of:

  • receiving a plurality of selective call messages, each of said plurality of selective call messages having one of a plurality of selective call addresses corresponding thereto;

    time division multiplexing said plurality of selective call messages into said plurality of phases to form said signal, which of said plurality of phases for placing one of said plurality of selective call messages determined in response to said baud rate and one of said plurality of selective call addresses corresponding to said one of said plurality of selective call messages, wherein said step of time division multiplexing comprises the steps of;

    storing each of said plurality of selective call messages as a plurality of message bits in one of a predetermined number of phase queues, the one of said predetermined number of phase queues determined by said selective call addresses and the predetermined number determined by said baud rate; and

    generating said signal comprising a bit stream, by serially inserting each of said plurality of message bits from each of said predetermined number of phase queues in a sequence starting with a first of said message bits stored in a first of said predetermined number of phase queues and thereafter sequentially inserting message bits in a wraparound manner such that after inserting a first of said message bits stored in a last of said predetermined number of phase queues, next inserting a second of said message bits stored in said first of said predetermined number of phase queues; and

    transmitting said signal.

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