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Method of employing weighted open loop power control in a base station

  • US 6,584,139 B2
  • Filed: 02/26/2002
  • Issued: 06/24/2003
  • Est. Priority Date: 03/21/2000
  • Status: Expired due to Term
First Claim
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1. A method for operating a base station for controlling transmission power levels using a spread spectrum time division duplex technique having frames with time slots for communication, comprising:

  • a) receiving, in a first time slot, a first communication including a transmission power level;

    b) measuring a power level of the first communication;

    c) determining a path loss estimate based in part on the power level determined at step (b) and the transmission power level obtained at step (a);

    d) determining a long term path loss estimate based on prior received path loss estimates;

    e) setting a transmission power level for a second communication in a second time slot based in part on the path loss estimate weighted by a first factor and the long term path loss estimate weighted by a second factor, wherein the first and second factors are a function of a time separation between the first and second time slots; and

    f) determining a quality, α

    , of the pathloss estimate based in part on a number of time slots, D, between the first and second time slot; and

    wherein the first factor is α and

    the second factor is 1-α

    .

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