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Method and an apparatus for establishing a wireless communication link between a base unit and a remote unit

  • US 5,247,702 A
  • Filed: 11/08/1991
  • Issued: 09/21/1993
  • Est. Priority Date: 11/08/1991
  • Status: Expired due to Term
First Claim
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1. A method of establishing a wireless communication link between a base unit and a remote unit comprising:

  • transmitting periodically a sync signal in a first selected time period in a selected frequency channel by the base unit;

    scanning for said sync signal by said remote unit;

    transmitting a first response signal encoded by a first code in said selected frequency channel by said remote unit in response to the detection of said sync signal, in a second selected time period, different from the first selected time period;

    transmitting a first control signal encoded by the first code by the base unit in said selected frequency channel, in a third selected time period, different from the first and second selected time periods, said first control signal containing a second code to be used in the communication session between the base unit and the remote unit;

    receiving said first control signal by the remote unit, in said third time period;

    decoding said first control signal by the remote unit; and

    communicating in said selected frequency channel between said base unit and said remote unit by transmitting an encoded data signal, encoded by said second code, by the base unit, in a fourth selected time period, different from the first, second, and third selected time periods and by transmitting another encoded data signal, encoded by said second code, by the remote unit in a fifth selected time period, different from said first, second, third and fourth time periods.

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