BIDIRECTIONAL RELAY METHOD, BASE STATION, MOBILE TERMINAL AND RELAY STATION

PROBLEM TO BE SOLVED: To provide a bidirectional relay method, base station, mobile terminal and relay station.

SOLUTION: The disclosed method includes the steps of: simultaneously transmitting data symbols to be transmitted to the relay station, respectively after a constellation of received signals from a base station and a mobile terminal is adjusted at a relay station so as to have the same rotating angle and the same minimum signal point distance, at the base station and the mobile terminal; receiving the first data symbol at the relay station; selecting a first constellation corresponding to a combination of modulation schemes actually applied to the base station and the mobile terminal and then acquiring a first coordinate point closest to the first data symbol on the first constellation at the relay station; broadcasting a modulation symbol corresponding to the first coordinate point at the relay station; and receiving the modulation symbol and acquiring data transmitted from a partner side on the basis of an estimate of the modulation symbol and data information respectively transmitted by the other in the base station and the mobile terminal.

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