preliminary result of paced vs unpaced tcp

one paced tcp vs one unpaced tcp.
Topology (script):

tcp1 -> n0 -> n2 -> n3 -> sink1 (unpaced TCP)
tcp2 -> n1 -> n2 -> n3 -> sink2 (paced TCP)

n0->n2, n1->n2: 2Mb 10ms
n2->n3: 1Mb 20ms

The effect is actually different for different TCP variants. In general, as the length of the flow is large enough, paced TCP is better.



See the following details:

Flow 2 is the paced flow and flow 1 is the unpaced flow.

1. Reno:


Reno vs Reno



2. NewReno:


NewReno vs NewReno




3. FACK:


Fack vs Fack





4. Plain TCP



Tahoe vs Tahoe