Patent ID: 6728918
Filing Date: 2004-04-27
Classification: H04B,H04L

Abstract:
A relay transmission method for transmitting a data frame from a transmitter on a transmission side to a transmitter on a reception side via one or more relay transmitters, the method comprising:transmitting a plurality of the data frames, with a frame number added to each thereof, from the transmitter on the transmission side to one or more of the relay transmitters; sequentially transferring the data frame by one or more of the relay transmitters to the transmitter on the reception side; transmitting, from the transmitter on the reception side to one or more of the relay transmitters, a retransmission request containing the frame number of any data frame which has not been normally received by the transmitter on the reception side, wherein the retransmission request transmitted by the transmitting of the retransmission request contains one or more frame numbers other than any frame number corresponding to the data frame normally received by the transmitter on the reception side; sequentially transferring the retransmission request by one or more of the relay transmitters, such that each of the one or more relay transmitters deletes any frame number corresponding to the data frame stored in itself from among the frame numbers contained in the received retransmission request; retransferring, by one or more of the relay transmitters, the data frame corresponding to the frame number deleted by said sequentially transferring the retransmission request, to the transmitter on the reception side; retransmitting, when the retransmission request is received by the transmitter on the transmission side, the data frame corresponding to the frame number contained in the received retransmission request, from the transmitter on the transmission side to the one or more of the relay transmitters; and sequentially transferring the data frame transmitted in said retransmitting of the data frame by one or more of the relay transmitters.