Patent ID: 7006534

Claim:
A radio communication system for performing radio communication control having frames with a plurality of transmit and receive time slots and guard intervals between said receive time slots, said system as implemented in a base station comprising: a propagation information calculation device comprising: a continuous time slot allocating means for allocating an up continuous time slot comprising a single continuous transmitting time slot and a single continuous expanded guard bit portion and for allocating, to a terminal device, a down continuous time slot comprising a single continuous receiving time slot and a single continuous expanded guard bit portion, and a propagation information calculating means for communicating with the terminal unit during a period defined by the single continuous transmitting time slot to calculate propagation information about radio wave propagation between a radio base station and the terminal unit; wherein a transmission timing calculation device, located in a terminal unit, comprises: a transmission timing calculating means to calculate, during the period of the single continuous transmitting time slot and based on the propagation information, transmission timing for a signal to be transmitted from the terminal unit to the radio base station; and a signal transmitting means to transmit the signal in accordance with the transmission timing, whereby an expanded range of protection is provided by the expanded guard bits by delaying transmission based on said calculated transmission timing so that up data is received in a receiving time slot.