The present invention is one for high-rate mobile communication: N multiple access repeater propagated as do not provide a high data rate mobile communication services, such as IMT-2000, and a public wireless LAN in a special structure such as a building or a vessel having a multi-layered shadow area and to occur effectively relaying the radio signals for the purpose of service extensions apply the wireless optical relay technology for distributing a plurality of the sub unit / combined in a propagation shadow area for, which can adjust the output level according to the size of the propagation shadow area small wireless optical attenuator containing relates to a multiple access repeater. N multiple access relay system, and preferably transmitting the RF signal received from the base station in the sub unit is converted into a digital optical signal to the distribution number of the plurality of sub-unit, unit 1 for more specifically, high-rate mobile communication of the invention main unit for transmitting a multiplexed optical signal received from the unit to the base station is converted into an RF signal, and transmits a digital optical signal received from the main unit to the device is converted into RF signals, and optical to RF signals received from the terminal It converted into a signal to comprises a plurality of sub-units to be transmitted to the main unit. Mobile communication, wireless optical repeater, relay system