Working around AirPort Extreme

Longman, Bill longman at sharplabs.com
Tue Nov 9 16:24:52 MST 2004


> > Maybe I misunderstand, but as far as I know, USB 1.x has 12mb/s 
> > (megabit/second) bandwith. So I don't understand very well 
> what you mean 
> > with 1mb/s ? Did you roughly translate this as 1 megaBYTE/second ?
> 
> i might have muddled my bits and bytes, though i think usb 
> becomes a bottle neck with wireless networking.

Well at 12Mbps, the 1ms USB time slice just "happens" to hold 1500 bytes
which also just so happens to coincide with the MTU for most Ethernet
devices. It could possibly be a bottleneck if other USB devices are on the
same hub. But equally, WiFi throughput falls off dramatically after several
meters, depending on the antenna and local environmental factors. Seems to
me like they're a pretty good match. But this is just for ye olde 802.11b.
USB 1.x gets deluged by 802.11a/g. Gotta go to 2.0 for those and you'll have
*heaps* o' USB BW left over there.


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