Transport protocols and bulk file transfer

[Lisong Xu <>]

All about Section 2.3

1) In addition to SABUL and SOBAS, maybe we should also mention another 
'well-known' protocol TCP-westwood, which estimates the available 
bandwidth based on the delay information of acks, and then sets 
slow_start_ssthreshold accordingly.
http://www.cs.ucla.edu/NRL/hpi/tcpw/

2) About the time precision of bandwidth estimation and the delay-based 
protocols. I understand that bandwidth estimation may benefit from a 
high precision. But I am not sure why bandwidth-estimation require 
higher time precision than delay-based protocols, since both of them are 
based on the delay changes which are "on the same order of magnitude as 
the serialization delay at the bottleneck". Am I missing something?

Thanks
Lisong



--

Lisong Xu                       Tel : (402)472-1053
Assistant Professor             Fax : (402)472-7767
Computer Science & Engineering  mail: 

University of Nebraska-Lincoln  http://cse.unl.edu/~xu