Patent ID: 6438371
Filing Date: 2002-08-20
Classification: H04H,H04W

Abstract:
A multimode service radio communication system comprising an integrated base station, a local base station, and an allocation device, wherein:said integrated base station and said local base station are connected to each other via optical fibers and are configured to communicate with each other using the optical fibers; and said local base station and said allocation device being configured to communicate with each other using radio; and further wherein, said integrated base station is configured to integration-convert plural kinds of signals in respective frequency bands which do not overlap with one another into signals included in a shared frequency band, to convert the signals included in the shared frequency band into optical signals and to transmit the optical signals to said local base station via said optical fibers, said local base station is further configured to convert the optical signals transmitted from said integrated base station via said optical fibers into signals in the shared frequency band and to apply the signals in the shared frequency band to an antenna to be radiated therefrom as radio signals, and said allocation device comprises a shared antenna, a frequency division multiplexer, and a link unit and is further configured so that: said shared antenna is sensitive to the shared frequency band to receive the radio signals radiated from said local base station; said frequency division multiplexer division-converts the radio signals received by said shared antenna into plural kinds of signals in the respective frequency bands which do not overlap with one another; and said link unit links to an external receiver to send the plural kinds of signals in the respective frequency bands which do not overlap with one another to said external receiver as a signal in a frequency band corresponding to a frequency band of said external receiver.