[e2e] a means to an end

David P. Reed dpreed at reed.com
Thu Nov 6 14:16:06 PST 2008

Fred Baker wrote:
> It sure is more convenient to be able to include only the people you 
> want involved in the conversation and leave everyone else out of it.
Enabling filtering is the more general idea you are calling for here.   
We achieve that in wireless networks by "code division multiplexing".  
Doesn't need to involve "location" (which would be space-division 
multiplexing, i.e. beam-forming) to achieve orders of magnitude in 

Yes, if you enable most communications to be easily filtered out by 
those not interested (by tuning one's selective receiver to cover only a 
single place or time or coding/modulation) you can make communications 
more efficient.

That is the same sort of efficiency that "location" addressing gives 
you, and often it's a lot more efficient than attempting to deliver to 
one place.

I'm making an architectural principle argument:  if you want a piece of 
information, there are many ways to reduce the waste/cost/...  and 
switching the communications based on "place" is *not the fundamental 
one*.  That said, sometimes it is.  If most of your communications is 
via fiber, mostly between elements that don't move, and where those 
containers contain a largely static collection of information, then 
"location" turns out to be useful.   Whole industries can be built on it 
that last maybe 25 years or more, and that's not bad.

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