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Radio data protocol communications system and method

  • US 4,972,507 A
  • Filed: 09/09/1988
  • Issued: 11/20/1990
  • Est. Priority Date: 09/09/1988
  • Status: Expired due to Fees
First Claim
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1. A method of radio data communications between a base station and a plurality of user stations comprising the following steps:

  • calling simultaneously from the base station all user stations with a first request to which the user stations are compelled to give a response;

    after a time delay unique to each user station causing each of said user stations to give said compelled response to said first request with a status report which occupies substantially one bit width of time on a common communications channel between said user stations and said base station;

    in response to those user stations having a certain said status report, sending from said base station a second request for data from those user stations having a predetermined status, with said second request including a unique answer time delay in which to response to said second request for each user station; and

    causing each of such stations to respond after said unique answer time delay to said second request for data.

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