New TCP Stacks
Reno (AIMD) based, loss indicates
congestion
Back off less when see congestion
Recover more quickly after backing
off
Scalable TCP: exponential recovery
Tom Kelly, Scalable TCP: Improving
Performance in Highspeed Wide Area
Networks Submitted for publication,
December 2002.
High Speed TCP: same as Reno for low
performance, then increase window more
& more aggressively as window
increases using a table
Vegas based, RTT indicates
congestion
Caltech FAST TCP, quicker response
to congestion, but …
Standard
Scalable
High Speed
cwnd=38pkts~0.5Mbits