[e2e] j'accuse NFV

Detlef Bosau detlef.bosau at web.de
Fri May 1 04:38:58 PDT 2015

Am 01.05.2015 um 04:49 schrieb Vern Paxson:
>> Perhaps my comment is a typical "Detlef" comment, but again I look at
>> ...
>> Sorry for the rant, but during the last years, I got crazy on these things.
> It's okay, we know to just ignore your messages.
> 		Vern

You may well ignore them, but that does not change reality.

Of course, you can ignore reality as well.

May I refer to

*Title:* Beyond the Radio: Illuminating the Higher Layers of Mobile Networks
*Author:* N. Vallina-Rodriguez, S. Sundaresan, C. Kreibich, N. Weaver,
and V. Paxson
*Bibliographic Information: *ICSI Technical Report TR-14-003
*Date:* December 2014
*Research Area: *Networking and Security
*Type: *Technical Reports
*PDF:* https://www.icsi.berkeley.edu/pubs/techreports/TR-14-003.pdf

Let me only quote the abstract.

> Cellular network performance is often viewed as primarily dominated by
> the radio technology.
> However, reality proves more complex: mobile operators deploy and
> configure their networks
> in different ways, and sometimes establish network sharing agreements
> with other mobile
> carriers. Moreover, regulators have encouraged newer operational
> models such as Mobile
> Virtual Network Operators (MVNOs) to promote competition. In this
> paper we draw upon data
> collected by the ICSI Netalyzr app for Android to develop a
> characterization of how operational
> decisions, such as network configurations, business models, and
> relationships between
> operators introduce diversity in service quality and affect user
> security and privacy. We delve in
> detail beyond the radio link and into network configuration and
> business relationships in six
> countries. We identify the widespread use of transparent middleboxes
> such as HTTP and DNS
> proxies, analyzing how they actively modify user traffic, compromise
> user privacy, and
> potentially undermine user security. In addition, we identify network
> sharing agreements
> between operators, highlighting the implications of roaming and
> characterizing the properties
> of MVNOs, including that a majority are simply rebranded versions of
> major operators. More
> broadly, our findings highlight the importance of considering
> higher-layer relationships when
> seeking to analyze mobile traffic in a sound fashion.

And then, let's shorten the thing to come to the point. Or better, in
this case to the colon:

> Cellular network performance is often viewed as primarily dominated by
> the radio technology.
> However, reality proves more complex:

Up to now, anything sounds fine. Up to now, one could think, we
eventually learned that network performance is NOT primarily dominated
by the radio technology.

And I sincerely hoped to read, that mobile network performance IS
primarily dominated by the radio channel's condition and in case of
cellular networks by the cell occupation.

When we have a longer look at the TR, we get one of those, frankly
spoken, distracting discussions of the "higher layers" in mobile
networks and we try to understand and to solve "problems" in wireless
networks, which occur on the radio channel itself.

If your signal, e.g., suffers total extinction due to multipath
interference, you neither can help it by "management" or by "business
models" or by
netalyzr gadgets for ANDROID,.

You may ignore my post - and in case of an extinct signal, you even
don't need doing so - you will simply not receive it, because you are
No matter, how sophisticated your business model or how intelligent your
upper layers will be.

Detlef Bosau
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