Therefore, if {HEAD ~ the data length} of {TAIL ~ the transmission data} to be transported by the feedback frame on the reception side is shorter than the predetermined data length which derives from the format of the frame, then the feedback frame can be transmitted from the reception side to the transmission side without changing the format of the feedback frame and lowering the reception rate 
Therefore , if { HEAD ~ the data length } of { TAIL ~ the transmission data } to be transported by the feedback frame on the reception side is shorter than the predetermined data length which derives from the format of the frame , then the feedback frame can be 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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