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Radio communication terminal for optimizing transmission of messages to selective call transceivers and method therefor

  • US 6,512,923 B2
  • Filed: 02/03/1999
  • Issued: 01/28/2003
  • Est. Priority Date: 02/03/1999
  • Status: Expired due to Term
First Claim
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1. In a radio communication terminal comprising a controller, a plurality of base receivers, and a plurality of base transmitters, operating under a frequency reuse plan for communicating to and from a SCT (selective call ransceiver) located in any one of a plurality of communication zones corresponding to the frequency reuse plan, a method for optimizing transmission of messages to the SCTs, comprising:

  • receiving a registration request from the SCT each time the SCT enters a new communication zone;

    tracking a time dependent history of the SCT'"'"'s whereabouts according to each registration request received from the SCT;

    receiving a message intended for the SCT;

    transmitting the message to the SCT;

    waiting a predetermined time to receive an acknowledgement message from the SCT indicating that the message seas received;

    if the acknowledgement message is not received, determining from the history of the SCT'"'"'s whereabouts one or more most probable communication zones where the SCT may be located; and

    re-transmitting the message to the SCT at the one or more most probable communication zones.

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