Thomas Kunz
Systems and Computer Engineering
8
A More Accurate Picture
nEarly analysis does not accurately model real TCP stacks
nWith large RTO granularity, interference is unlikely,
if time required for link-level retransmission is small
compared to TCP RTO
–Standard
TCP RTO granularity is often large (500 ms)
–Minimum
RTO (2*granularity) is large enough to allow a small number of
link level retransmissions, if link level RTT is relatively
small
–Interference
due to timeout not a significant issue when wireless RTT small, and RTO
granularity large