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Method and apparatus for automatically attempting to seize a radio channel in a multichannel communication system

  • US 4,400,585 A
  • Filed: 01/23/1981
  • Issued: 08/23/1983
  • Est. Priority Date: 11/30/1979
  • Status: Expired due to Term
First Claim
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1. Control means for a mobile station of a multichannel radio communication system, wherein said mobile station includes means for scanning the radio channels for a non-busy radio channel and providing an indication signal when a non-busy radio channel has been detected and means for attempting to seize a radio channel, said control means including:

  • (a) means for generating a clock input having successive clock cycle intervals;

    (b) counting means responsive to the clock signal for continuously totallizing the clock cycle intervals of the clock signal to provide a totallized count thereof, the counting means being incremented for each clock cycle interval in response to the presence of the indication signal and being decremented for each clock cycle interval in response to the absence of the indication signal;

    (c) means responsive to an unsuccessful channel seizure attempt by said seizing means for generating a random time interval having a magnitude that is at most a maximum magnitude, where the maximum magnitude is inversely proportional to the totallized count of the counting means; and

    (d) means for automatically attempting to seize a radio channel at the end of the random time interval.

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