Patent ID: 8577222
Filing Date: 2013-11-05
Classification: H04B

Abstract:
1. An optical relay system comprising: a base station interface unit configured to output radio frequency (RF) signals of multiple bands received from a base station to at least one optical distribution unit and transmit the RF signals of the multiple bands received from the at least one optical distribution unit to the base station according to frequency bands; the optical distribution unit configured to convert the RF signals received from the base station interface unit into optical signals and transmit the optical signals to at least one optical unit or convert optical signals received from the at least one optical unit into RF signals and output the RF signals; and the optical unit configured to convert the optical signals received from the optical distribution unit into RF signals and output the RF signals to a mobile terminal or convert RF signals received from the mobile terminal into optical signals and output the optical signals, wherein the base station interface unit combines the received RF signals of the multiple bands into one signal, divides the combined signal into a plurality of signals and transmits the plurality of signals to at least one optical distribution unit and combines the RF signals of the multiple bands received from the at least one optical distribution unit into one signal, divides the combined signal into a plurality of signals, and transmits the plurality of signals to the base station, wherein the base station interface unit includes a plurality of main drive base station units (MDBUs) configured to filter and amplify the RF signals received from the base station according to frequency bands and a main combination/division unit (MCDU) configured to combine the RF signals of the multiple bands output from the plurality of MDBUs or the RF signals of the multiple bands received from the at least one optical distribution unit into one signal using a combiner and divide the combined signal into a plurality of signals using a divider, and wherein the MCDU includes one modem for communication with the optical unit, and wherein a transmission unit of the modem is provided between the first combiner and the first divider and a reception unit of the modem is provided between the second combiner and the second divider.