4 ms·
There is some theorem that says network utilization with collision detection can be as low as 1/e^2, though in practice it rarely approaches that. 20% sounds li
by rwallace 7y ago
There is some theorem that says network utilization with collision detection can be as low as 1/e^2, though in practice it rarely approaches that. 20% sounds like a plausible bad case if the network is heavily loaded and the stars are not lining up right.
But how do you get dramatically better with collision avoidance? If you've allocated most of the available bandwidth to machines that are leaving it unused, utilization could well drop substantially below 20%.
- Gibbon1 7y agoIf you look at token ring, idle machines just pass the token on if they don't have a packet to send. Other systems have central coordination and assign 'channels'. I think Bluetooth tries to do that for audio. (unsure)
- archi42 7y agoBT channel-hops 1600 times/second - at least that's what it did years ago when I memorized this for an exam. I don't recall audio getting some special handling, but it was only SBC and maybe AptX back then. Yes, WiFi can run some coordination function, but can't recall the details. Maybe it's called DCF/Distributed coordination function (same exam, I think 54 or 108MBit was the norm back then. So probably terribly outdated - but indeed: coordination isn't new for WiFi). (Yes, I could look up everything, but don't have the time right now ;-)