[e2e] What is the meaning of "end-to end"?

demir demir at usc.edu
Tue May 22 08:24:53 PDT 2001

What is "N"? If it is "the number of ends", I find this
"ambigious" because N can be very large, but the system might do
unicasting. To me, "casting" is "directing". 
N =0, Nocasting
N =1, Unicasting
N>=2, Multicasting
N=Maximal (a special edge-case of Multicasting), where Maximal>=2
If "multi" is not used in "literally", they all can be seen as special
case of multicasting.

> I have always been bothered by the asymmetry implied by the classification
> N=2 - unicast
> N>2 - multicast
> N maximal - broadcast.
> Communications is more than the act of *sending*.
> So we also should have:
> N=2 - uniscan
> N>2 - multiscan
> N maximal - holoscan
> Yes, I'm serious.  We should classify systems by the number of stations a 
> station can listen to simultaneously.  If you think about this a while, it 
> is orthogonal to the prior dimension, because there are such things as 
> holoscan but non-broadcast systems (e.g. repeater-based wireless networks 
> since the receiver treats the original signal to it as noise, preferring to 
> get the repeated packet from a more local station).
> The symmetry applies especially well with architectures like Ethernet and 
> 802.11b.  And becomes even more relevant with systems like OFDMA which 
> start out with systems that are holoscan, turning them into uniscan and 
> unicast through a bunch of protocol layers.
> - David
> --------------------------------------------
> WWW Page: http://www.reed.com/dpr.html

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