Design of WUSB system based on Nak-Only handshake protocol

2011 
A Nak-Only handshake protocol is brought out to reduce the waste of bandwidth when short data packet such as ACK transmitting in a PHY-layer packet with specific length.It keeps the receiver negatively waiting instead of sending the ACK packet,so that the waste of bandwidth could be reduced.This program requires a stable TX-RX switching time in the PHY-layer.But if the switching time sometimes exceeds the limit,packet lost could also be avoided by buffering 3 data packets in the transmitter.It can be proved from the simulation that Nak-Only handshake protocol improves the throughput rate of WUSB,and the effect is close to the ideal case that packet length could be freely specified in PHY-layer.
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