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Abstract

A mobile communication system having a small base station provides radio communications between the small base station and a mobile station. The small base station is connected with a central station via an optical transmission line. The central station includes a modulation section which modulates a time-division multiple signal, an electric/optic converter section which converts an output signal of the modulation section to an optical signal, and sends the optical signal to the optical transmission line. The central station further includes an optic/electric converter section which receives an optical signal from the small base station via the optical transmission line, and converts a received optical signal to an electrical signal, and a demodulation section which demodulates an output signal from the optic/electric converter section. The small base station includes an optic/electric converter section which receives the optical signal from the central station via the optical transmission line, and converts the received optical signal to an electrical signal, a transmit amplifier section which amplifies an output signal from the optic/electric converter section, a receive amplifier section which amplifies a received signal from the mobile station. The small base station further includes an electric/optic converter section which converts an output signal from the receive amplifier section to an optical signal, and sends the optical signal to the central station via the optical transmission line, and a transmit/receive switching control section for the mobile station.

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First Claim