Thomas Kunz
Systems and Computer Engineering
365
Congestion Avoidance and Control
Slow Start
ninitially, congestion window size cwnd =
1 MSS (maximum segment size)
nincrement window size by 1 MSS on each new ack
nslow start phase ends when window size reaches the slow-start threshold
ncwnd
grows exponentially with time during slow start
–factor of 2
per RTT
–Could be
less if sender does not always have data to send