[Ns-developers] progress on wireless PHY
ruben.merz at epfl.ch
Mon Nov 20 06:16:18 PST 2006
> the 'channel' setting also needs to be configured for reception: the phy
> needs to know on which channel it is listening to (unless it has
> multiple radio receivers each of which can listen to a different
> channel). So, are you suggesting that we add:
> - a channel argument to the Send method
> - a SetListeningChannel method
Yes. And for the moment, let's make it simple and assume that we can
only listen to on one channel at a time. Because, with CDMA or UWB or
even narrow band radios (like 802.11), you could listen to on several
"channels" at a time (several code, or several frequencies). But this is
something we should have at some point.
> i.e., is it possible for a PHY to be listening on a given channel and
> send a packet on another channel ? This seems rather unlikely to me in
> which case, I would lean towards a single SetChannel method used to set
> the sending and listening channel at the same time.
No, it is not feasible if you have a single radio with a single RF chain
and a single antenna. You would probably have to have two radios to do it.
BTW, this would be a nice feature for ns-3 in the long term to be able
to attach two or more PHYs.
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