Weighted open loop power control

1. 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.

2. The method of claim 1 wherein the first weighting factor represents a quality of the pathloss estimtate.

3. The method of claim 1 wherein the determining the pathloss estimate is by subtracting a received power level of the reference signal from a transmit power level signaled on a broadcast channel, further comprising transmitting the broadcast channel.

4. 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.

5. The time division duplex/code division multiple access base station of claim 4 wherein the first weighting factor represents a quality of the pathloss estimate.

6. The time division duplex/code division multiple access base station of claim 4 wherein the determining the pathloss estimate is by subtracting a received power level of the reference signal from a transmit power level signaled on a broadcast channel, the antenna for transmitting the broadcast channel.

7. 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.

8. The time division duplex/code division multiple access base station of claim 7 wherein the first weighting factor represents a quality of the pathloss estimate.

9. The time division duplex/code division multiple access base station of claim 7 wherein the determining the pathloss estimate is by subtracting a received power level of the reference signal from a transmit power level signaled on a broadcast channel, the means for transmitting for transmitting the broadcast channel.