Method for allocating downlink electromagnetic power in wireless networks
AssigneeLucent Technologies Inc.
InventorsDavid Di Huo, Eshwar Pittampalli
Life of this patent
Estimating the term…
Abstract
A method for allocating downlink power in a wireless network determines downlink transmit powers to permit a target performance goal to be satisfied for defined radio frequency coverage areas. Base stations transmit electromagnetic transmissions. Received signal parameters of the electromagnetic transmissions are measured at measurement locations within defined radio frequency coverage areas. A data processing system determines propagation factors associated with the electromagnetic transmissions as a function of the measurement locations. The data processing system determines a downlink transmit power for at least one of the base stations based upon at least one target performance goal for the coverage areas and the propagation factors.
Claims31
A method for allocating downlink power in a wireless network comprising the steps of:
- measuring received signal parameters, of electromagnetic transmissions from base stations, at measurement locations within defined radio frequency coverage areas, the measurement locations being geographical points where mobile stations may obtain wireless service from the wireless network;
- determining propagation factors associated with the electromagnetic transmissions as a function of the measurement locations;
- and
- determining a downlink transmit power for at least one of the base stations based upon the propagation factors and a target performance goal for the coverage areas.
A method for allocating downlink power in a wireless network comprising the steps of:
- measuring received signal strengths, of electromagnetic transmissions from base stations, at measurement locations within geographic coverage areas, the measurement locations being geographical points where mobile stations may obtain wireless service from the wireless network;
- determining propagation factors of the electromagnetic transmissions for at least one propagational path between each of said measurement locations and a corresponding base station;
- calculating an initial downlink transmit power within a transmitter power interval for each of the base stations based upon the propagation factors and target carrier-to-interference ratios for the measurement locations;
- and
- calibrating the initial downlink transmit power to obtain a resultant downlink transmit power satisfying the target carrier-to-interference ratios for the measurement locations with at least a minimum probability.
A system for allocating downlink power in a wireless network including base stations, the system comprising:
- a test receiver for measuring received signal strengths, of electromagnetic transmissions from the base stations, at measurement locations within defined radio frequency coverage areas, the measurement locations being geographical points where mobile stations may obtain wireless service from the wireless network;
- and
- a processing system including a determiner for determining propagation factors and a calculator for calculating initial downlink transmit powers for the base stations, the propagation factors being associated with the electromagnetic transmissions as a function of the measurement locations, the initial downlink transmit powers being within corresponding transmitter power intervals based upon the propagation factors and at least one target performance goal for the coverage areas.
Dependencies are inferred from the claim text.