[e2e] Reacting to corruption based loss

Detlef Bosau detlef.bosau at web.de
Sun Jun 26 15:07:52 PDT 2005

Cannara wrote:
> Now to the question: "Why couldn´t we continue to assume loss free links?"

O.k, this remark was intendedly somewhat teasing ;-)

And of course it was thought in a "TCP manner", i.e. the assumption that
all losses are due to congestion and therefore are treated like
congestion notifications. 

I´m personally interested in wide area mobile wireless networks ("mobile
networks") used as access networks to the Internet. In this model,
the Internet _core_ consists of wirebound networks and mobile networks
are used as _access_ networks only.

For this particular case I advocate the use of PEP to make loss
differentiation for TCP unnecessary. 

So, correctly I should say: In the particular case of using mobile
wireless networks as access networks to the Internet, we can compensate
corruption based loss at the access network by the use of PEP/RLP/... to
that degree that a TCP sender may continue to reckognize any loss as
being due to congestion.

Of course, not all protocols are TCP. And of course different protocols
may require different strategies.

However, I´m not quite sure whether my position meets the general
consensus. I´ve earned both, strong support and strong criticism when I
talked about
this to colleagues.

Detlef Bosau
Galileistrasse 30
70565 Stuttgart
Mail: detlef.bosau at web.de
Web: http://www.detlef-bosau.de
Mobile: +49 172 681 9937

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