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METHODS AND APPARATUS FOR UPLINK FRAME SYNCHRONIZATION IN A SUBSCRIBER STATION

  • US 20090245227A1
  • Filed: 03/26/2008
  • Published: 10/01/2009
  • Est. Priority Date: 03/26/2008
  • Status: Active Grant
First Claim
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1. A method for uplink frame synchronization, the method being implemented by a subscriber station, the method comprising:

  • recording a first time stamp corresponding to a first downlink frame;

    recording a second time stamp corresponding to a second downlink frame;

    using the first time stamp and the second time stamp to determine a propagation delay change; and

    adjusting uplink transmission timing based on the propagation delay change.

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