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Asymmetric multiple access protocol for a communication system

  • US 6,353,598 B1
  • Filed: 10/30/1998
  • Issued: 03/05/2002
  • Est. Priority Date: 10/31/1997
  • Status: Expired due to Term
First Claim
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1. A method of time division duplexing in a mobile cellular communication system comprising:

  • dividing the communication system into a plurality of cells, each cell being served by a base station;

    providing a channel in the communication system over which a base station and at least one mobile station may communicate;

    using time division duplexing to divide the channel into a plurality of frames, each frame consisting of a plurality of slots;

    coordinating the time division duplexing across a plurality of cells; and

    in which each base station allocates slots to either uplink communication or downlink communication to optimise throughput in the channel comprising that each frame includes a compulsory uplink communication slot and a compulsory downlink communication slot, inhibiting a mobile station from using selected slots of frames dependent upon the mobile station being determined as in an area where drown-out would otherwise occur, the selected slots not including the compulsory uplink communication slot and compulsory downlink communication slot.

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