Patent ID: 6122083
Filing Date: 2000-09-19
Classification: H04J

Abstract:
A mobile communication system comprising a base station and a central station, said base station being connected to said central station via an optical transmission line, said base station time-divisionally performing a transmitting operation and a receiving operation using a transmit timeslot and a receive timeslot at the same frequency between the base station and a mobile station;wherein:said central station comprises:modulation means for modulating a time-division multiple signal;electric/optic converter means for converting an output signal of said modulation means to an optical signal during said transmit timeslot for said mobile station, and sending the optical signal to said optical transmission line;optic/electric converter means for receiving an optical signal from said base station via said optical transmission line during said receive timeslot for said mobile station, and converting the received optical signal to an electrical signal; anddemodulation means for demodulating an output signal from said optic/electric converter means; andsaid base station comprises:optic/electric converter means for receiving the optical signal from said central station via said optical transmission line, and converting the received optical signal to an electrical signal;transmit amplifier means for amplifying an output signal from said optic/electric converter means;receive amplifier means for amplifying a received signal from the mobile station;electric/optic converter means for converting an output signal of said receive amplifier means to an optical signal, and sending the optical signal to said central station via said optical transmission line; andswitching control means, coupled to said transmit amplifier means and said receive amplifier means, for detecting the output signal of said optic/electric converter means, and discriminating said transmit timeslot for said mobile station, and time-divisionally switching said transmitting operation and said receiving operation based on the discriminated transmit timeslot for said mobile station.