Re: [Ekiga-devel-list] DCCP

[yannick <sevmek free fr>]

Le dimanche 08 juin 2008 à 22:37 +0200, Christian Hoene a écrit :
> 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

"In order for the [RFC4340] encapsulation to pass through Network
   Address Translation (NAT) devices, these devices must be updated to
   recognize and properly modify DCCP.  This is the long-term objective
   for DCCP, and work is underway to specify the necessary operations."

:(

> 
> > 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 
> 
> 
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> 
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