Method for orthogonal transmission of uplink and downlink information in frequency devision duplex relay system

Provided in the present invention is a method for orthogonal transmission of uplink and downlink information in a frequency division duplex relay system, which enables relay node of each cell in the system to be in different working states, namely, in a same time period, the relay node of a cell is in a state of receiving information, i.e. the relay node of the cell receives information sent from a base station of the cell on a first subband of a downlink frequency band and signals sent from each remote user equipment of the cell on a first subband of an uplink frequency band; while the relay node of a neighbouring cell of the said cell is in a state of transmitting information, i.e. the relay node of the neighbouring cell transmits information to a base station of the neighbouring cell on a second subband of the uplink frequency band and to each remote user equipment of the neighbouring cell on a second subband of the downlink frequency band. In this way, interference between neighbouring cells can be avoided effectively.