Re: TECH: wireless gets real

From: Eugene Leitl (
Date: Tue Jul 10 2001 - 05:15:30 MDT

On Mon, 9 Jul 2001, Ken Clements wrote:

> Yes, this is a big problem. At the moment I am sitting in the
> IEEE802.11 meeting in Portland OR, and we are stuck with some of
> these. The trouble is that wireless within 802 has to use the 802
> layers above the MAC. The result is that we cannot properly address
> wireless routing here (transport layer).

Well, here's another nice mess you've gotten me into.

> The infrastructure companies want to use 11b as the last link ONLY.
> This means that routing happens on the wires, not over the air. If

802.11b is just the start of it, the next generation (whether 802.11a or
HIPERLAN) promises to deliver up to 55 MBps, ultrabroadband talks about
100 MBps, and in principle you should be able to get almost to 1 GBps,
with a mature local wireless. That's relatively serious bandwith, even if
if you have to route traffic from many cells away.

> you can do routing that way, you cannot beat it. If you need to route
> in the air, it impacts things across layers and the general algorithms
> used for wires (fibres) do not work well without modifications for the
> nature of wireless propagation, connection density and error rates.

Worse is better, of course. Except on the long run.

-- Eugen* Leitl <a href="">leitl</a>
ICBMTO : N48 10'07'' E011 33'53''
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