Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Patent
1998-04-09
2000-07-04
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
455 69, H04B 100
Patent
active
060851082
ABSTRACT:
The power levels of signals transmitted by base stations in a communication are controlled. Power level control commands are transmitted from a remote station to base stations from which the remote station receives signals to control the power levels of the signals transmitted by the base stations. A determination is made whether the remote station simultaneously receives a first signal from a first base station and at least one second signal from at least one second base station that include substantially identical message information. The first and second base stations transmit first and second reports of power levels of the first and second signals, respectively, to the controller. The controller compares the first and second reports and transmits first and second commands for adjusting the power levels of the first and second signals to the first and second base stations, respectively. The power level control commands are transmitted from the remote station to the base stations less frequently during macrodiversity to reduce the signalling requirements between the controller and the base stations. Also, the step size of the adjustment of the power levels of the first and second signals by the controller is reduced during macrodiversity to reduce the signalling requirements. This power control method is particularly beneficial for a CDMA system.
REFERENCES:
patent: 5109528 (1992-04-01), Uddenfeldt
patent: 5327577 (1994-07-01), Uddenfeldt
patent: 5982760 (1999-11-01), Chen
Knutsson Jens
Persson Magnus
Banks-Harold Marsha D.
Eisenzopf Reinhard J.
Telefonaktiebolaget LM Ericsson
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