|発明の名称||RADIO COMMUNICATION SYSTEM|
PROBLEM TO BE SOLVED: To suppress power consumption and to make a radio communication system immune to interference from the other system in order to perform carrier sense.
SOLUTION: A radio communication system 100 performs a communication in a RIT mode. A receiver C is brought into a reception waiting state for a period WD after a RIT Data Request Frame (frame RFc) is transmitted to a transmitter. The transmitter is brought into a reception waiting state if there are target data TDF subjected to transmitted, and transmits the target data TDF to the receiver C when the frame RFc is received from the receiver C in the reception waiting state. Before transmitting the frame RFc, the receiver C performs carrier sense CS for measuring a received radio field intensity. If the received radio field intensity exceeds a threshold value, the reception waiting state is not continued but the reception waiting state is cancelled and the present transmission of the frame RFc is stopped. The carrier sense CS is stopped until next transmission timing of the frame RFc.
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