Re: VJCC vs. Keshav
Detlef Bosau <[email protected]>
| Newsgroups | gmane.network.end2end |
|---|---|
| Message-ID | <[email protected]> |
Am 18.04.2013 14:53, schrieb Jon Crowcroft: > In missive <[email protected]>, Detlef Bosau typed: > > >>Yes. And being short and frankly: When it comes to mobile networks, I > >>don't believe a word of the packet-pair and packet-train stuff. > > >>Even for the radio interface, it simply doesn't make sense to talk about > >>an "average bit rate" in this case, when this is associated with both, a > >>reasonable hight throughput and a reasonably low block corruption rate. > > this depends on the model and simulator - if you model the signal > propagation and do it with fine grain enough discrete event rate, then Jon, I once attended a talk where the speaker proposes to do ray traicing... And please keep in mind the GEOMETRIC "period" of minima and maxima in Rayleigh-fading. IIRC: Rule of thumb: half of the bearer frequencies wavelength. I.e. with GSM, round abouht 1 GHz, wavelength round about 30 centimetres. I.e. 15 centimetres between two points of maximum receiving power. It was exactly that moment, where I stopped giggling about the persons who I've seen "mobile phone callisthenics" by shifting around their phones 5 cm to the left or 10 cm to the right in order to increase their WWW browsers throughput. And you want to simulate that, perhaps with ray tracing and perhaps a temporal resolution of say 1 ms and a geometric resolution of say 1 cm? Sorry, I cannot take this seriously. -- ------------------------------------------------------------------ Detlef Bosau Galileistraße 30 70565 Stuttgart Tel.: +49 711 5208031 mobile: +49 172 6819937 skype: detlef.bosau ICQ: 566129673 [email protected] http://www.detlef-bosau.de