Weighted open loop power control
First Claim
1. A method for transmission power control of a user equipment in a wireless time division duplex communication system using code division multiple access, the method comprising:
- measuring an interference level;
determining a pathloss estimate;
determining a long term average of pathloss estimates; and
multiplying a first weighting factor, α
, by the determined pathloss estimate, producing a weighted pathloss estimate;
multiplying (1-α
) to the determined long term average of pathloss estimates, producing a weighted long term pathloss estimate; and
determining a transmission power level of the user equipment by adding the weighted pathloss estimate to the weighted long term pathloss estimate to the measured interference level to a target signal to interference ratio to a constant value.
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Abstract
A transmission power level for a user equipment in a wireless time division duplex communication system using code division multiple access is determined. An interference level is measured. A pathloss estimate is determined. A long term average of pathloss estimates is determined. A first weighting factor, α, is determined by the determined pathloss estimate, producing a weighted pathloss estimate. (1−α) is multiplied to the determined long term average of pathloss estimates, producing a weighted long term pathloss estimate. A transmission power level of the user equipment is determined by adding the weighted pathloss estimate to the weighted long term pathloss estimate to the measured interference level to a target signal to interference ratio to a constant value.
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Citations
9 Claims
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1. A method for transmission power control of a user equipment in a wireless time division duplex communication system using code division multiple access, the method comprising:
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measuring an interference level;
determining a pathloss estimate;
determining a long term average of pathloss estimates; and
multiplying a first weighting factor, α
, by the determined pathloss estimate, producing a weighted pathloss estimate;
multiplying (1-α
) to the determined long term average of pathloss estimates, producing a weighted long term pathloss estimate; and
determining a transmission power level of the user equipment by adding the weighted pathloss estimate to the weighted long term pathloss estimate to the measured interference level to a target signal to interference ratio to a constant value. - View Dependent Claims (2, 3)
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4. A time division duplex/code division multiple access user equipment comprising:
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a pathloss estimation device for determining a pathloss estimate;
a transmit power calculation device for determining a long term average of pathloss estimates, multiplying a first weighting factor, α
, by the determined pathloss estimate, producing a weighted pathloss estimate, multiplying (1-α
) to the determined long term average of pathloss estimates to produce a weighted long term pathloss estimate, and determining a transmission power level of the time division duplex/code division multiple access user equipment by adding the weighted pathloss estimate to the weighted long term pathloss estimate to a measured interference level to a target signal to interference ratio to a constant value. - View Dependent Claims (5, 6)
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7. A time division duplex/code division multiple access user equipment comprising:
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means for measuring an interference level;
means for determining a pathloss estimate;
means for determining a long term average of pathloss estimates; and
means for multiplying a first weighting factor, a, by the determined pathloss estimate, producing a weighted pathloss estimate;
means for multiplying (1-α
) to the determined long term average of pathloss estimates, producing a weighted long term pathloss estimate; and
means for determining a transmission power level of the user equipment by adding the weighted pathloss estimate to the weighted long term pathloss estimate to the measured interference level to a target signal to interference ratio to a constant value. - View Dependent Claims (8, 9)
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Specification