TCP Reno congestion window Recall that the congestion window length changes with time as follows during TCP Reno's congestion avoidance phase: If an ACK is received, then increase cwnd by If congestion is detected, then decrease cwnd cy Suppose the probability of failed transmission is p: the probability of a successful transmission is then 1 - p. The transmission rate per second. (a) Write down the equation for the expected change of cwnd per time step. (b) At equilibrium, the expected change is 0. Using (a), show that x_ = 1/RTT squareroot 2(1 - p)/p TCP Reno congestion window Recall that the congestion window length changes with time as follows during TCP Reno's congestion avoidance phase: If an ACK is received, then increase cwnd by If congestion is detected, then decrease cwnd cy Suppose the probability of failed transmission is p: the probability of a successful transmission is then 1 - p. The transmission rate per second. (a) Write down the equation for the expected change of cwnd per time step. (b) At equilibrium, the expected change is 0. Using (a), show that x_ = 1/RTT squareroot 2(1 - p)/p