The booster as claimed in claim 1, further comprising: an interference measuring unit for measuring an interference quantity of the amplified uplink signal in the booster and an interference quantity information receiver for receiving information about an interference quantity in the base station, wherein said gain controller controls the gain of the uplink signal in response to the transmission power of the reference signal at the base station, the received power of the reference signal at the booster, the noise power of the amplified uplink signal at the booster, the interference quantity of the amplified uplink signal in the booster and the interference quantity in the base station.Ĩ. The booster as claimed in claim 5, wherein said downlink signal amplifier can vary a time constant for adjusting the gain of the downlink signal.ħ. The booster as claimed in claim 1, further comprising: a downlink signal amplifier for amplifying a downlink signal sent from the base station to the mobile station, wherein said gain controller further controls the gain of the downlink signal in response to the transmission power of the reference signal at the base station, the received power of the reference signal at the booster and the noise power of the amplified uplink signal at the booster.Ħ. The booster as claimed in claim 1, wherein said uplink signal amplifier can vary a time constant for adjusting the gain of the uplink signal.ĥ. The booster as claimed in claim 1, wherein the reference signal is a perch signal.Ĥ. The booster as claimed in claim 1, wherein the reference signal includes information about transmission power of the reference signal at the base station, and wherein said transmission power information receiver receives the information about the transmission power of the reference signal at the base station by receiving the reference signal.ģ. A booster for receiving, amplifying and transmitting a signal to be transferred between a base station and a mobile station, said booster comprising: an uplink signal amplifier for amplifying an uplink signal from the mobile station to the base station a received power measuring unit for receiving a reference signal sent from the base station, and for measuring received power of the reference signal at the booster a transmission power information receiver for receiving information about transmission power of the reference signal at the base station a noise power measuring unit for measuring noise power at the booster of the uplink signal amplified by said uplink signal amplifier and a gain controller for controlling a gain of the uplink signal in response to the transmission power of the reference signal at the base station, the received power of the reference signal at the booster and the noise power of the amplified uplink signal at the booster.Ģ. Itoh et al., “Auto Gain Adjustment Booster for W-CDMA,” IEICE General Convention 2000, B-5-82, p. IEEE Vehicular Technology Conference, pp. Suzuki et al., “A Booster Configuration with Adaptive Reduction of Transmitter-Receiver Antenna Coupling for Pager Systems,” 50th IEEE Vehicular Technology Conference, pp. Klingler, “Radio Coverage for Road and Rail Tunnels in the Frequency Range 75 to 1000 MHz,” 41st IEEE Vehicular Technology Conference, pp. Ohdate, “A Frequency Offset Booster with an Oscillation Prevention Function for Land Mobile Communication,” 37th IEEE Vehicular Technology Conference, pp. Suzuki et al., “Design of a Tunnel Relay System with a Leaky Coaxial Cable in an 800-MHz Band Land Mobile Telephone System,” IEEE Transactions on Vehicular Technology, vol.

Docomo network booster