[e2e] RTT estimation

[Ping Pan]

Have you checked Vern Paxson's work in this area?

- Ping

Dong Zheng wrote:
> Hi,
> 
> Sorry to bother you all, I have a simple question to ask.
> 
> We know that TCP keeps a dynamic RTT estimation and uses this
> estimation to set the timer for congestion avoidance. The estimation
> keep track of the RTT fluctuation and hence it will affect the
> congestion avoidance behavior. If the estimation is not good, it will
> trigger unnecessary retransmissions. 
> 
> My question is whether there is any metric that tells how well the
> current Jacobson/Karn algorithm doing the estimation? I mean, given the
> fluctuation of the RTT, to what level of the fluctuation can the current
> algorithm track?
> 
> Thank you very much.
> 
> -Dong