John Heffner wrote:
What exactly causes such a huge delay? What is the TCP measured RTO
in these circumstances where spurious RTOs happen and a 3 second
minimum RTO makes things better?
I haven't done a lot of work on wireless myself, but my understanding is
that one of the biggest problems is the behavior link-layer
retransmission schemes. They can suddenly increase the delay of packets
by a significant amount when you get a burst of radio interference. It's
hard for TCP to gracefully handle this kind of jump without some minimum
RTO, especially since wlan RTTs can often be quite small.
(Replying to myself) Though F-RTO does often help in this case.
-John
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