COMMUNICATION METHOD AND COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To aggregate radio link information related to a direct radio link and a relay radio link, and to validly utilize the communication resource of a radio link.SOLUTION: A radio station S1 transmits an extended RTS(Request to Send) including a training signal to a radio station S2 and a relay station R1. The radio station S2 estimates radio link information L-S1S2 between the radio station S1 and the radio station S2 by using the training signal. The relay station R1 estimates the radio link information L-S1R1 between the radio station S1 and the relay station R1 by using the training signal. The radio station S2 transmits an extended CTS(Clear To Send) including the training signal and the radio link information L-S1S2 to the radio station S1 and the relay station R1. All the three radio link information L-S1R1, S-S2R1 and L-S1S2 owned by the communication system are aggregated in the relay station R1.