RTT Estimation
- Jacobson [1988]: this method has problems w/ large RTT fluctuations
- New method: Use mean & deviation of RTT
- A = smoothed average RTT
- D = smoothed mean deviation
- Err = M - A { M = measured RTT}
- A ? A + g*Err {g = gain = 0.125}
- D ? D + h*(|Err| - D) {h = gain = 0.25}
- RTO = A + 4D
- Integer arithmetic used throughout. Complex initialization process ...