On Wed, Jun 29, 2011 at 1:48 PM, Mikael Abrahamsson <swm...@swm.pp.se> wrote: > On Wed, 29 Jun 2011, Cameron Byrne wrote: > >> Sounds like a vendor specific issue :( > > Absolutely, but this is way too typical for these kinds of networks. > >> Good tcp vs default tcp will not close the window tight due to some >> ephemeral loss or delay. The penalties are generally too strong in tcp >> for >> the issues of delay and loss in 3g ... this is one of the main selling >> points for tcp proxies .... but better done with modern tcp on the clients >> instead of a middle box > > For what kind of devices? I can get full speed (870 kilobyte/s) on 7.2 HSPA > with single TCP stream on a linux box. Are you referring to handsets that > get improvement on high latency links? >
Yes. Smartphones on UMTS/HSPA have poor bandwidth-delay product, hence it being common for mobile providers to proxy the TCP to open windows faster. Cameron > -- > Mikael Abrahamsson email: swm...@swm.pp.se >
