On Jan 17, 2008, at 4:24 AM, Peter Teunissen wrote:
I have no experience with wifi range extenders but it seems to me it
should really just 'resend' the signal. If the extender is a 802.11g
device, I'd expect it to produce the same throughput as the original
source.
When dealing with a half-duplex broadcast network like this, it's
helpful to think of bandwidth in terms of time. A range extender has
to take the time to listen to a packet, then it has to take the same
amount of time to transmit that packet. (In a half-duplex network you
can't talk and listen at the same time.) So it takes twice as much
time to send a packet through a range extender as it does to send it
direct. This halves the available bandwidth.
Likewise, copying from a wireless device to another wireless device,
through an access point, gives you half the bandwidth you'd get going
from a wireless device to a wired device; the access point has to
listen to each packet, then resend it.
This is also why having 802.11b devices on an 802.11b/g network tends
to lower throughput dramatically; the b packets take up more airtime,
leaving less bandwidth available.
--
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
