Base station for compensating route delay between bases...

Details Base station for compensating route delay between bases... Base station for compensating route delay between bases...

2005-04-26

2005-04-26

Nguyen, Chau (Department: 2663)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S350000, C370S519000

Reexamination Certificate

active

06885647

ABSTRACT:
A base station for compensating a fixed route delay between a base station and a mobile station of a CDMA mobile communication system and an operation method thereof are disclosed. This base station includes a clock signal generation unit for receiving a 10 MHz, TOD and 1 PPS signal from a GPS receiving unit and generating a 1st even second clock signal in synchronization with the 1 PPS and a 2nd even second clock signal which is obtained by delaying the 1st even second clock signal by a maximum bidirectional propagation delay time between a base station and a relay unit, a first signal processing unit for receiving the 1st even second clock signal from the clock signal generation unit and modulating a forward link channel from the base station to a mobile station in synchronization with the 1st even second clock signal, and a second signal processing unit for receiving the 2nd even second clock signal from the clock signal generation unit and demodulating a backward link channel from the mobile station to the base station in synchronization with the 2nd even second clock signal, for thereby compensating a decrease of a cell communication radius due to a fixed route delay factor on a communication route between a base station and a mobile station.

REFERENCES:
patent: 5781541 (1998-07-01), Schneider
patent: 5875402 (1999-02-01), Yamawaki
patent: 6477183 (2002-11-01), Yamamoto
patent: 6480483 (2002-11-01), Yahata et al.
patent: WO 9916183 (1999-04-01), None

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