Voice over GPRS?

[Andreas Kostyrka]

* Paul Wouters <paul at xelerance.com> [070202 18:16]:
> On Fri, 2 Feb 2007, Robert Michel wrote:
> 
> > Does anybody has experiances/ideas about Voice over GPRS?
> 
> See: http://www.cl.cam.ac.uk/~rc277/globe02.pdf
> 
> They discuss tcp as well as udp performance over GPRS.
> 
> > How long is the delay? It could maybe used for asyncron
> > voice communication Talk2Talk (instead of pushing a button)
> 
> > By using 1KB/s for audio and some overhead, let
> > us say 2 KB/s 0.24Euro/MB = 24 Cent for 500 seconds,
> > 60 seconds makes then about 3 cents. When both using
> > this 6 cents. Hmm that would be interesting when
> > the user makes often make brakes/pause in their talk.
> 
> Using speex, you'd need 1.6kb upstream. So bandwidth is not the

GPRS often has only 9600 bits per second, aka 1200 bytes per second
upstream at best.

Andreas