Voice over GPRS?
andreas at kostyrka.org
Fri Feb 2 18:23:17 CET 2007
* 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.
More information about the community