Patent ID: 6778511
Filing Date: 2004-08-17
Classification: H04W

Abstract:
A method of controlling transmitting power in a cellular radio communication system comprising one or several transmitters each communicating with receivers located within its respective area of coveragethe method characterised by the following steps determining in the receiver the quality (Q) of signals received from the transmitter; calculating in the receiver a desired output power level ({tilde over (P)}n) from the transmitter as a function of estimated previously used output power ({circumflex over (P)}nâˆ’1) from the transmitter in relation to channel quality (Qnâˆ’1) from the transmitter to the receiver; delta-modulating in the receiver the desired output power ({tilde over (P)}n) by comparing it with the estimated previously used output power ({circumflex over (P)}nâˆ’1) from the transmitter to determine a power order command; transmitting the power order command to the transmitter ordering it to either raise or lower its output power; and calculating in the transmitter its new output power dependent on the received power order command, a power step size function (&Dgr;p), previously used output power (Pnâˆ’1) and a forgetting function (&lgr;).