[e2e] Wireless Networks. An Example: GPRS.

Detlef Bosau detlef.bosau at web.de
Mon Mar 11 12:51:36 PDT 2013

Am 11.03.2013 14:58, schrieb dpreed at reed.com:
> These are "specifications", and not actual measurements of actual systems.
> In particular, the 95 percentile statement on Delay Class 3 is a 
> statement that "only 5 percent of the time will any packets be delayed 
> longer than 375 seconds."   This does not characterize or even 
> specifiy a channel model - perhaps the 5 percent are infinite delays 
> (permanent losses) and all other packets are delivered *in 1 msec. or 
> less.*


So, we don't know anything about the channel - and I was berated for not 
having provided a QoS architechture ("this is no witchcraft!") for a 
channel we do nothing about.

And David,/that /hurts.

Detlef Bosau
Galileistraße 30
70565 Stuttgart                            Tel.:   +49 711 5208031
                                            mobile: +49 172 6819937
                                            skype:     detlef.bosau
                                            ICQ:          566129673
detlef.bosau at web.de                     http://www.detlef-bosau.de

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.postel.org/pipermail/end2end-interest/attachments/20130311/82b848e0/attachment.html

More information about the end2end-interest mailing list