Method and apparatus for deriving a combined transmit power...

Details Method and apparatus for deriving a combined transmit power... Method and apparatus for deriving a combined transmit power...

2005-09-23

2010-02-02

Sobutka, Philip J (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S442000, C455S069000

Reexamination Certificate

active

07657278

ABSTRACT:
A method and apparatus for deriving a combined transmit power control (TPC) command during handover are disclosed. During handover, a combined TPC command is generated from two or more TPC commands. The combined TPC command is set to −1 for decrease of the transmit power if a soft symbol of the TPC signal from any cell indicates decrease of the transmit power and the signal-to-interference ratio for the cell is greater than a reliability threshold. Otherwise, the combined TPC command is set to −1 if the function γ is not greater than the combining threshold, and set to +1 if the function γ is greater than the combining threshold, where the function γ represents a log-likelihood ratio of a probability density function of the combined TPC command.

REFERENCES:
patent: 6269239 (2001-07-01), Hashem et al.
patent: 6490461 (2002-12-01), Muller
patent: 2008/0102878 (2008-05-01), Tiedemann, Jr.
patent: 2008/0214224 (2008-09-01), Ostman et al.
“3rdGeneration Partnership Project; Technical Specification Group Radio Access Network; Physical Layer Procedures (FDD)”, Release 4, 3GPP TS 25.214 V4.6.0, Mar. 2003.
“3rdGeneration Partnership Project; Technical Specification Group Radio Access Networks; User Equipment (UE) Radio Transmission and Reception (FDD)”, Release 4, 3GPP TS 25.101 V4.11.0, Mar. 2004.

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