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Transmission power control apparatus and method in a mobile communication system

  • US 5,873,028 A
  • Filed: 10/20/1995
  • Issued: 02/16/1999
  • Est. Priority Date: 10/24/1994
  • Status: Expired due to Term
First Claim
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1. A method of transmission power control in a mobile communication system including a mobile station and a base station, the method comprising the steps of:

  • controlling a transmission power of each radio channel at one of the base station and the mobile station so as to make a difference between a reception CIR (Carrier to Interference Ratio) and a target CIR of each radio channel at another one of the base station and the mobile station smaller; and

    changing the target CIR for each radio channel at said another one of the base station and the mobile station, according to a channel quality of each radio channel at either one of the base station and the mobile station;

    wherein said either one of the base station and the mobile station has measurement means for measuring a distribution of the reception CIR for each radio channel periodically, and the changing step changes the target CIR according to the distribution of the reception CIR measured by the measurement means; and

    the changing step changes the target CIR such that a probability for the reception CIR to be lower than a required CIR becomes less than or equal to a prescribed value in the distribution of the reception CIR measured by the measurement means.

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