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Fast forward link power control in a code division multiple access system

  • US 5,461,639 A
  • Filed: 07/18/1994
  • Issued: 10/24/1995
  • Est. Priority Date: 11/22/1993
  • Status: Expired due to Term
First Claim
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1. A method for controlling power of a first communication device by a second communication device, the first communication device transmitting over a forward communications channel at at least one data rate, the second communication device transmitting over a reverse communications channel, the method comprising the steps of:

  • the first communication device transmitting a plurality of frames on the forward communications channel, each frame being transmitted at a predetermined data rate of the at least one data rate;

    the second communication device decoding the plurality of frames;

    the second communication device transmitting a decode indication to the first communication device in response to whether each flame was successfully decoded;

    determining a frame error rate for each predetermined data rate in response to the decode indication;

    generating a difference, for each predetermined data rate, between the frame error rate and a predetermined target error rate;

    if the difference is greater than a predetermined threshold, adjusting the power of the first communication device to a first predetermined level;

    if the difference is equal to the predetermined threshold, adjusting the power of the first communication device to a second predetermined level; and

    if the difference is less than the predetermined threshold, adjusting the power of the first communication device to a third predetermined level.

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