H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/005 (2006.01) H04Q 7/36 (2006.01)
Patent
CA 2299771
A method of controlling the power in a wireless communication system (200). In one embodiment of the invention, a base station (210) determines the information rate of a signal to be transmitted (270) to a mobile station (220), and obtains the variable power control scaling factor (245) based on this information rate. The base station (210) then transmits the variable power control scaling factor (245) to the mobile station (220). The mobile station (220) determines a target signal quality measurement (130) for a received signal (270) from the base station (220), such as a target E b/N0 (130), and scales the target E b/N0 (130) by the variable power control scaling factor (245). The mobile station (220) also obtains an information rate scaling factor based on the information rate of the received signal (270), and further scales the target E b/N0 by this information rate scaling factor. The mobile station (220) then compares the target E b/N0 (130) to a measured E b/N0 (160) of the received signal (270). An increase in power of the received signal (270) is requested when the measured E b/N0 (160) of the received signal (270) is smaller than the scaled E b/N0 (260). A decrease in power of the received signal (270) is requested when the measured E b/N0 (160) of the received signal (270) is larger than the scaled E b/N0 (260). Providing the variable power control scaling factor (245) to the mobile station (220) allows frames having an information rate lower than the full rate to be transmitted at a power even lower than the power of a frame having an information rate equal to the full rate times the information scaling factor.
Jiang Frances
Kamel Raafat Edward
Li Quinn
Salvarani Alexandro Federico
Weaver Carl Francis
Kirby Eades Gale Baker
Lucent Technologies Inc.
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