Method and apparatus for setting pilot signal transmit powers

Details Method and apparatus for setting pilot signal transmit powers Method and apparatus for setting pilot signal transmit powers

2007-09-18

2007-09-18

Gesesse, Tilahun (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S436000, C455S127100, C455S069000

Reexamination Certificate

active

10476673

ABSTRACT:
The invention relates to a method and apparatus for setting pilot signal transit powers in a CDMA system. Subscriber units (211,213,215) perform pilot signal measurement measurements and transmits these to a receiver (603). A processor (605) determines a ranking factor for each cell (217, 219,221) at least partly dependent on the pilot signal measurement and a cell overlap condition of the subscriber unit (211, 213, 215) during measurements. The processor (605) ranks the cells (217,219,221) according to the ranking factor, and sets the pilot signal transmit power of at least one cell in response to the ranking of the cells by adjusting a power amplifier (609). The cell overlap condition is determined as the handover state of the subscriber unit (211,213,215) or as the number of cells, which can be received by the subscriber unit (211,213,215) during the measurement The invention is applicable to 3rd generation cellular communication systems.

REFERENCES:
patent: 6157668 (2000-12-01), Gilhousen et al.
patent: 6167282 (2000-12-01), Hunsberger
patent: 6285664 (2001-09-01), Bernstein et al.
patent: 6473614 (2002-10-01), Quensel et al.
Dongwoo, K. et al. “Pilot Power Control and Service Coverage Support in CDMA Mobile Systems,”Vehicular Technology Conference,1999 IEEE, pp. 1464-1468.

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