Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2006-07-04
2006-07-04
Orgad, Edan (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S069000, C455S067130, C370S318000, C370S320000, C370S335000
Reexamination Certificate
active
07072680
ABSTRACT:
An apparatus and method is provided for controlling transmission power levels of respective mobile stations in a wireless cellular system, wherein the signal is transmitted from a transmitter at a controlled power level so that either the average received power level or the average signal to interference ratio (SIR) at receiver is close to a desired level so that the desired signal quality is achieved. According to a first embodiment, the desired level for the average received signal power is calculated based on the ensemble average intercell interference power level and the desired SIR levels. According to a second embodiment, the received average SIR level is estimated based on the average desired signal power and the ensemble average interference power. The average received power level (average SIR value) is compared to the desired level to generate a power control command. The power control command is fed back to the mobile station to instruct the adjustment of transmission power of the mobile station.
REFERENCES:
patent: 6157687 (2000-12-01), Ono
patent: 2001/0002905 (2001-06-01), Funamori
patent: 2002/0021682 (2002-02-01), Ariyoshi et al.
patent: 2004/0160921 (2004-08-01), Kaipainen et al.
patent: 2005/0187728 (2005-08-01), Shin et al.
“Optimal Power Control in Interference-Limited Fading Wireless Channels with Outage-Probability Specifications” Kandukuri, et al.; Jan. 2002.
Chang Chung-Ju
Lee Chieh-Ho
Accton Technology Corporation
Orgad Edan
Thomas Kayden Horstemeyer & Risley
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