[e2e] Multiple TCP-friendly Sessions and Cong. Control in user-mode?

[Aaron Falk]

On Wed, 2002-04-10 at 10:32, Shivkumar Kalyanaraman wrote:
> 
> Sounds consistent. But, is this argument well recognized in the brave new
> world where applications run over UDP/RTP and do their own CC? Are
> application developers implementing congestion control at the app layer ?
> How far is the CM or other approaches gaining traction with end-system
> designers?
> 

Some applications do their own CC because they, rightly or wrongly,
perceive TCP as being too "heavyweight".  Some just don't need reliable
transfer but want to be responsible citizens.  This is all part of the
justification for DCP. Indeed, a good argument for not putting CC in
user space is that getting congestion control right is not easy and
applications can get it wrong.

See:
http://www.ietf.org/internet-drafts/draft-floyd-dcp-problem-00.txt
http://www.ietf.org/internet-drafts/draft-kohler-dcp-02.txt

--aaron