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Trunking system access method

  • US 5,377,193 A
  • Filed: 04/30/1992
  • Issued: 12/27/1994
  • Est. Priority Date: 04/30/1992
  • Status: Expired due to Term
First Claim
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1. In a trunking communication system that comprises a plurality of communication units, a limited number of communication resources that are transceived via a predetermined number of repeaters, and a communication resource allocator that allocates the limited number of communication resources among the plurality of communication units, wherein one of the communication resources functions as a control channel and the remaining communication resources function as voice channels, wherein, from time to time, the control channel is used as a voice channel, and, when the control channel is used as a voice channel, the plurality of communication units monitor one of the voice channels as a monitored voice channel, a method for the communication system to process control information in an efficient manner, the method comprises the steps of:

  • a) when a communication unit has control information to transmit to the communication resource allocator, determining whether the monitored voice channel is busy;

    b) when the monitored voice channel is not busy, transmitting, by the communication unit, the control information on the monitored voice channel;

    c) transmitting, by the communication resource allocator, recommended channel parameters on at least the monitored voice channel, wherein the recommended channel parameters comprise at least one recommended channel;

    d) when the monitored voice channel is busy, decoding, by the communication unit, the recommended channel parameters to ascertain said at least one recommended channel;

    e) determining, by the communication unit, whether said at least one recommended channel is usable; and

    f) when the recommended channel is usable, transmitting, by the communication unit, the control information on said at least one recommended channel.

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