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Radio communication system for communicating between two stations upon automatic switching to an idle communication channel

  • US 4,850,030 A
  • Filed: 10/28/1987
  • Issued: 07/18/1989
  • Est. Priority Date: 06/23/1984
  • Status: Expired due to Fees
First Claim
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1. A radio communication system including a plurality of stations in which each station includes a radio transceiver including transmitting and receiving sections and a communication is performed between stations on an idle frequency channel which is selected from a plurality of frequency channels, comprising:

  • an originating call station, said originating call station being one of the plurality of stations, including first means for determining an idle channel, means for transmitting a station identification code and an idle channel code indicative of said idle frequency channel on a special originating call channel which is preliminarily arbitrarily determined between stations, and means for shifting said originating call station to said idle channel after transmission of said station identification code and said code indicative of said idle channel;

    a terminating station, said terminating station being one of the plurality of stations, including an apparatus for standing by on said originating call channel, second means for determining when the station identification code in a received signal coincides with a self identification code of said terminating station, and means responsive to said second means for determining shifting of said terminating station to the channel corresponding to said idle channel code in said received signal, thereby performing the communication between at least said two stations on said idle channel; and

    means provided in one of said communicating stations for transmitting another idle channel code to the other one of said communicating stations on said communication channel, means provided in said one of said communicating stations for shifting the frequency channel to said another idle channel when said another idle channel is transmitted;

    means provided in the other station for responding to said another idle channel code on said communication channel and for shifting to the another idle channel, and means for performing the communication between at least said two stations in said another idle channel.

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