[e2e] Delivery Times .... was Re: Bandwidth, was: Re: Free Internet & IPv6

Detlef Bosau detlef.bosau at web.de
Fri Dec 28 04:35:55 PST 2012

Am 27.12.2012 22:48, schrieb dpreed at reed.com:
> Some LTE technical architecture folks have said to me, informally, 
> that LTE (unlike GPRS) was designed from the ground up for TCP/IP, 
> whereas GPRS was not really intended for TCP/IP.
> I don't know what that means, but perhaps one ought to ignore GPRS's 
> delay classes.

O.k., in LTE, we don't talk about delay classes any longer ;-) We now 
call it "terminal classes" ;-)

What I've read so far, LTE is often used as a DSL replacement, i.e. for 
STATIONARY users!!!!

When it comes to mobility, LTE inevitably inherits essential properties 
of UMTS and the like. E.g. Rayleigh-fading. And therefore consequently 
some kind of opportunistic scheduling, which is necessary to make 
wireless networks affordable for the users.

It may be possible that the problems are not that prominent as LTE is 
still yet to achieve huge numbers of customers. However, when LTE has 
fully reached the market, the problems are likely to be the same as in 
other mobile networks.

(Not that political correctly spoken: Whoever said that LTE is designed 
for TCP, I don't buy this. The contrary is the case. The broader the 
range of latencies will be, the less stationary delivery times will 
become. As one particular problem.)

Detlef Bosau
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detlef.bosau at web.de                     http://www.detlef-bosau.de
The nonsense that passes for knowledge around wireless networking,
even taught by "professors of networking" is appalling.  It's the
blind leading the blind. (D.P. Reed, 2012/12/25)

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