Interference suppression method of OFDM (Orthogonal Frequency Division Multiplexing) relay network

The invention discloses an interference suppression method of an OFDM relay network, which comprises the following steps that: A. user equipment carries out classification and feeds back respective classified information to the access nodes of the user equipment; B. each access node carries out resource allocation of access slot on the user equipment connected with the access node according to the classified information of the user equipment; C. each relay station estimates the required number of resource blocks and feeds back the requirement information of the resource blocks to the base station; and D. the base station carries out the resource allocation of back-transmission slot according to the feedback information of the relay station. The invention can improve the communication quality of the user equipment with poorer transmission quality in a cell while improving the total throughput of a system as much as possible, i.e. the communication rate of an edge user is improved. Moreover, the invention does not need signaling interaction among the access nodes and has low arithmetic complexity, low expenses and very strong practicability.