A data communication method in which {HEAD ~ the data frame} transmitted from the transmission side to the reception side and the feedback frame transmitted from {TAIL ~ the reception side} to the transmission side use a common format jointly, and in which if there is no substantial data to be transported by the feedback frame on the reception side, the feedback frame is transmitted from the reception side to the transmission side without changing the format of the feedback frame and lowering the reception rate 
A data communication method in which { HEAD ~ the data frame } transmitted from the transmission side to the reception side and the feedback frame transmitted from { TAIL ~ the reception side } to the transmission side use a common format jointly , and in which if there is no substantial data to be transported by the feedback frame on the reception side , the feedback frame is transmitted from the reception side to the transmission side without changing the format of the feedback frame and lowering the reception rate
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH