Re: [Ekiga-devel-list] DCCP

["Christian Hoene" <christian hoene gmx net>]

Hello,

> "The Datagram Congestion Control Protocol (DCCP) is being designed as
>  a partial solution to this potential problem by adding end host TCP-
> friendly
> congestion control behavior to high-rate UDP streams such as streaming
> media."

A good reading to DCCP can be found at
http://www.sigcomm.org/sigcomm2006/discussion/showpaper.php?paper_id=3

> -so only a partial solution of a becoming less "potential" problem due
> to advances
> with codecs which will slow down excessive UDP traffic.

Yes, both the codec and the DCCP must work hand-in-hand. If DCCP tells, that the link is congested, the codec must slow down its coding rate.

> -most soho embedded routers and firewalls are based on very old linux
> kernels without DCCP-
> support and the DCCP wikipedia article states not much implementations
> since years.

The current solution for NATs is to use DCCP on top of UDP.
http://www3.tools.ietf.org/id/draft-phelan-dccp-natencap-00.txt

> since 2006 university playground, but patches for Ekiga are welcome ;)

Did the Internet started a university playground? IMHO researcher are nothing but kids that like to play ;-) 

That's why I like to work at university...

Best,

 Christian