Patent ID: 8654781

Claim:
A method for relay station downlink cooperative retransmission, comprising: the relay station carrying out physical layer processing in advance on data that requires retransmitting according to different scenarios associated different possible number of available wireless resources for retransmitting data in a retransmission subframe, and generating corresponding Orthogonal Frequency Division Multiplexing (OFDM) signals; and said relay station monitoring the Physical Control Format Indicator Channel (PCFICH) of the retransmission subframe to obtain the determined number of occupied symbols of the Physical Downlink Control Channel (PDCCH) in the retransmission subframe; and according to the determined number of occupied symbols of the PDCCH in the retransmission subframe obtained from the monitoring result, said relay station selecting one of the generated OFDM signal with the corresponding number of available wireless resources for retransmitting the TB in the retransmission subframe from the OFDM signals generated from the Transport Block (TB) that requires retransmitting obtained by the physical layer processing step, and retransmitting the selected OFDM signal in the retransmission subframe.