Re: [TERNLI] Notes from tonight's ad hoc

Wesley Eddy <weddy@grc.nasa.gov> Fri, 21 July 2006 13:06 UTC

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Date: Fri, 21 Jul 2006 09:06:19 -0400
From: Wesley Eddy <weddy@grc.nasa.gov>
To: Kevin Fall <kfall@intel.com>
Subject: Re: [TERNLI] Notes from tonight's ad hoc
Message-ID: <20060721130619.GA12398@grc.nasa.gov>
References: <20060720181255.7BE1243F926@lawyers.icir.org> <012b01c6ac6a$ab4fea90$020a010a@kfallmobl>
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On Thu, Jul 20, 2006 at 07:09:14PM -0700, Kevin Fall wrote:
> Channel change might not be so exciting, but stuff like "I switched AP to a
> different network" might be interesting.... and of course, data rate change
> (e.g. 802.11b can support 4 rates).  802.16 has different convergence
> sublayers it can use, which potentially affects mtu (gag).
> 

802.16 also has adaptive modulation and coding that alter the rate of
the channel and may vary as the distance between a base station and
subscriber station changes.  Adaptive coding is common for satellite
links as well.  It seems like this type of event could be useful to
signal if it resulted in more than a doubling or halving of capacity, as
a simple filter.

-- 
Wesley M. Eddy
Verizon Federal Network Systems