PROBLEM TO BE SOLVED: To provide a point-multipoint transmission system where the transmission efficiency will deteriorate, without the need for increasing a distance measurement area in a frame, even if a transmission distance between a master station and a slave station placed at a remotest place is extended.;SOLUTION: The master station 10 is provided with a reception phase generating section 12, that generates timing of a received phase corresponding to a maximum transmission distance between the master station 10 and a slave station 20, and outputs a transmission frame to the slave station with the timing of the reception phase. The slave station 20 is provided with a fixed delay setting section 21 that outputs a fixed delay value preset in response to a distance between the slave station and the master station 10 and outputs a transmission frame, which is delayed by the fixed delay and a transmission delay set as a result of the distance measurement, to the master station 10.;COPYRIGHT: (C)2001,JPO
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