Weighted open loop power control
AssigneeInterDigital Technology Corporation
InventorsAriela Zeira, Sung-Hyuk Shin
Life of this patent
Estimating the term…
Abstract
A base station transmits a reference signal. The base station receives a communication. The received communication has a transmission power level set by measuring an interference level; determining the pathloss estimate using the reference signal; 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, producing a weighted long term pathloss estimate; and determining the transmission power level 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.
Claims9
A method for a base station in a wireless time division duplex communication system using code division multiple access, the method comprising:
- transmitting a reference signal;
- and
- receiving a communication, the received communication having a transmission power level set by measuring an interference level;
- determining the pathloss estimate using the reference signal;
- 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, producing a weighted long term pathloss estimate;
- and determining the transmission power level 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.
A time division duplex/code division multiple access base station comprising:
- a reference channel data generator and an antenna for transmitting a reference signal;
- and
- the antenna for receiving a communication, the received communication having a transmission power level set by measuring an interference level;
- determining the pathloss estimate using the reference signal;
- 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, producing a weighted long term pathloss estimate;
- and determining the transmission power level 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.
A time division duplex/code division multiple access user equipment comprising:
- means for transmitting a reference signal;
- and
- means for receiving a communication, the received communication having a transmission power level set by measuring an interference level;
- determining the pathloss estimate using the reference signal;
- 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, producing a weighted long term pathloss estimate;
- and determining the transmission power level 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.
Dependencies are inferred from the claim text.