| 摘要 |
PURPOSE:To obtain a booster radio relaying device which can efficiently relays only electromagnetic waves requiring relaying, by monitoring electromagnetic waves including channel designation information radiated from a base station to a mobile station at a relay station. CONSTITUTION:The presence of a call is discriminated that a demodulation output based on electromagnetic waves radiated by a mobile station in a relay service area is produced in an incoming channel control signal demodulator 9, and a controller 3 detects a channel designation signal from a base station side corresponding to the channel having the said demodulation output out of a demodulated output of an outgoing channel control signal demodulator 6 and drives incoming and outgoing channel selectors 7', 2' so as to relay electromagnetic waves of the channel number included in the said channel designation signal. In case of outgoing calls, the electromagnetic waves including the channel designation information radiated from the base station are monitored and the selectors 7', 2' are driven so as to be set to the designated channel similarly. |
