Efficiency of stop and wait Let s= total time between the transmission of a packet and reception of its ACK DTD transmission time of the packet Efficiency(no errors)=Dp/S S=DTp 2Dp+ DTa A cket B TE Dp TA DTAACKtrans.Time E=DIP/(DTP 2D dTA) DTP= pack ket trans timeEfficiency of stop and wait Let S = total time between the transmission of a packet and reception of its ACK DTP = transmission time of the packet Efficiency (no errors) = DTP/S A B DP = prop delay packet ACK S DTP DP DTA DP S = DTP + 2D P + DTA DTA = ACK trans. Time E = D DTP = packet trans. time TP/(DTP + 2D P + DTA )