Method of informing uplink synchronization using downlink...

Details Method of informing uplink synchronization using downlink... Method of informing uplink synchronization using downlink...

2008-01-01

2008-01-01

Anderson, Matthew D. (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S069000, C455S436000, C455S115100, C455S226100, C455S226200, C370S331000, C370S332000, C370S333000, C370S318000

Reexamination Certificate

active

07315748

ABSTRACT:
A method of informing a terminal of uplink synchronization acquisition in a mobile communication system by using downlink transmit power control (TPC) bits. The base station modifies and transmits power control bit patterns according to certain ‘N’ values defined as a pattern 01 count, and the terminal detects an indicator that informs uplink synchronization acquisition by the modified power control bit pattern. The terminal also maintains the transmit power of the synchronization acquisition timing by increasing the transmit power by an amount equal to the decrease caused by receiving the power control bits for detecting uplink synchronization acquisition.

REFERENCES:
patent: 6285887 (2001-09-01), Mimura
patent: 6356595 (2002-03-01), Czaja et al.
patent: 2005/0202837 (2005-09-01), Tanabe
patent: 0 999 657 (2000-05-01), None
“Optimum TPC command sequence in WCDMA”, Chen etal, Proceeding ICII 2001—Beijing 2001 International conference, vol. 2, pp. 134-138.
Chen, Chaoyang et al.; “Optimum TPC Command Sequence in WCDMA”; Proceedings of 2001 International Conference on Info-Tech and Info-Net; ICII 2001—Bejing, China, vol. 2; Oct. 29-Nov. 1, 2001; pp. 134-138.
Suda, H. et al.; “A Fast Transmit Power Control Based on Markov Transition for DS-CDMA Mobile Radio”; 1998 International Conference on Universal Personal Communication; vol. 1, Oct. 5-9, 1998, pp. 235-239.
3GPP TS 25.214 V3.12.0 (Mar. 2003); “Technical Specification Group Radio Access Network”; Physical Layer Procedures (FDD); (Release 1999).
International Search Report dated Aug. 23, 2004.

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