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Receiver based adaptive modulation scheme

  • US 6,701,129 B1
  • Filed: 09/27/2000
  • Issued: 03/02/2004
  • Est. Priority Date: 09/27/2000
  • Status: Expired due to Term
First Claim
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1. A method of adapting a current Link Mode (LM) in a radio communication system, a LM being a set of at least one transmission parameter, the communication system including a base station which transmits a signal to a remote unit using the current LM, the method comprising the steps of:

  • storing a sequence of allowed LMs at the base station and at the remote unit, each LM having a sequential position within the sequence;

    at the remote unit, determining a channel quality of the signal;

    at the remote unit, determining a desired LM from amongst the sequence of allowed LMs based on the channel quality;

    at the remote unit, determining a sequential difference defined as a difference between the sequential position of the current LM and the sequential position of the desired LM;

    transmitting the sequential difference from the remote unit to the base station;

    at the remote unit, setting a new current LM to be the desired LM; and

    at the base station, setting the new current LM using the sequential difference.

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