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User equipment using combined closed loop/open loop power control

  • US 7,075,969 B2
  • Filed: 05/24/2005
  • Issued: 07/11/2006
  • Est. Priority Date: 03/21/2000
  • Status: Expired due to Fees
First Claim
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1. A method for controlling transmission power levels in a spread spectrum time division duplex communication system having frames with time slots for communication, the method comprising:

  • receiving at a first communication station communications from a second communication station and transmitting from the first station power commands based on in part a reception quality of the received communications;

    transmitting from the first communication station a first communication having a transmission power level in a first time slot;

    receiving at the second communication station the first communication and the power commands;

    measuring a power level of the first communication as received;

    determining a pathloss estimate based on in part the measured received first communication power level and the first communication transmission power level; and

    setting a transmission power level for a second communication in a second time slot from the second station to the first station based on in part the pathloss estimate weighted by a quality factor and the power commands.

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