[e2e] What is the meaning of "end-to end"?
David P. Reed
dpreed at reed.com
Tue May 22 07:41:12 PDT 2001
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
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