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Method for inter operation of a cellular communication system and a trunking communication system

  • US 5,179,721 A
  • Filed: 11/05/1990
  • Issued: 01/12/1993
  • Est. Priority Date: 11/05/1990
  • Status: Expired due to Term
First Claim
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1. In a geographic region that contains at least one trunking communication system and at least one cellular communication system, wherein the trunking communication system and the cellular communication system have substantially overlapping coverage areas, wherein the at least one trunking communication system is operably coupled to the at least one cellular communication system, a method for a communication unit of a plurality of communication units to operate in either the at least one trunking communication system or the at least one cellular communication system, the method comprises the steps of:

  • a) monitoring at least one control channel of the at least one cellular communication system;

    b) transferring affiliation from the at least one cellular communication system to the at least one trunking communication system when a first access number of the communication unit is detected on the at least one control channel of the at least one cellular communication system;

    c) monitoring at least one control channel of the at least one trunking communication system; and

    d) receiving a communication via the at least one trunking communication system when the communication unit detects its trunking identification number on the at least one control channel of the trunking communication system.

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