>Present ethernets, from what I understand, transmit on demand and
>perform a random timeout in the event of collision. This means
More precisely, random timeouts chosen from exponentially increasing
intervals.
>throughput drops at around 60-70% utilisation (can't remember the
>exact figure).
>
>How about having the nodes in a cycle, where each one transmits, after
>which the next one either transmits data or a "I'm here but no data
>to transmit", so the next one could.
Congratulations, you've just reinvented token ring networks.
The reason Ethernet's collision resolution strategy isn't a big deal is
because modern networks have so much headroom. Switched Ethernet also
helps. Token rings do have the advantage of bounded delay.
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