Method of employing weighted open loop power control in a base station
AssigneeInterDigital Technology Corporation
InventorsAriela Zeira, Sung-Hyuk Shin
Life of this patent
Estimating the term…
Abstract
The method employing weighted open loop power control in a base station is initiated by the base station receiving a communication and measuring its received power level. Based on, in part, the received communication's power level and the communication's transmission power level, a path loss estimate is determined. A quality of the path loss estimate is also determined. The transmission power level for a communication from the base station is based, in part, on weighting the path loss estimate in response to the quality of the estimate.
Claims5
A method for operating a base station for controlling transmission power levels using a spread spectrum time division duplex technique having frames with time slots for communication, comprising:
- a) receiving, in a first time slot, a first communication including a transmission power level;
- b) measuring a power level of the first communication;
- c) determining a path loss estimate based in part on the power level determined at step (b) and the transmission power level obtained at step (a);
- d) determining a long term path loss estimate based on prior received path loss estimates;
- e) setting a transmission power level for a second communication in a second time slot based in part on the path loss estimate weighted by a first factor and the long term path loss estimate weighted by a second factor, wherein the first and second factors are a function of a time separation between the first and second time slots;
- and
- f) determining a quality, α, of the pathloss estimate based in part on a number of time slots, D, between the first and second time slot;
- and
- wherein the first factor is α and the second factor is 1-α.
A method for operating a base station for controlling transmission power levels using a spread spectrum time division duplex technique having frames with time slots for communication, comprising:
- a) receiving, in a first time slot, a first communication including a reference for a transmission power level;
- b) measuring a power level of the first communication;
- c) determining a reference level for a path loss estimate based in part on the power level determined at step (b) and the transmission power level obtained at step (a);
- d) determining a reference for a long term path loss estimate based on at least in part upon an average of path loss estimates of prior communications received by the base station;
- and
- e) setting a transmission power level for a second communication in a second time slot based in part on the path loss estimate weighted by a first factor and the long term path loss estimate weighted by a second factor, wherein the first and second factors are a function of time separation of the first and second time slots.
Dependencies are inferred from the claim text.