Re: [ns] Buffer monitoring on wireless

[Devendra R Jaisinghani <deven1@stanford.edu>]

Hi,
	Its not possible to use the queuemonitor from wired network in
wireless network since the former relies upon links which the wireless
networks don't have.
	To sum, you are on your own. Best place to implement this would in
line with the ifq but it would be a hack. Thats what I did to get quick
results. I take the queue snapshot after enqueing a packet and before
dequeuing a packet subject to some sampling interval.
	Also note that queue-monitoring can be very expensive in terms of
traces; in wired networks you may choose a particular node or a few number
of nodes but if you are using adhoc network then you really don't know
which node's queue to monitor. So an inline implementation seems a better
bet since you monitor the node queues which are actually used.
	If anyone else on the list has some experience with this, please
let us know!

- Devendra


On Wed, 6 Jun 2001, S. Stellin wrote:

> Hi ns-users,
> on wired networks it's easy to monitor a buffer size with a queue-monitor
> object, but I have problem with this on wireless networks. Here, we have the
> ifqlen. How can I monitor it? It's possible indipendently from the trace file?
> I can't find the answer on the documentation and the archive.
>
> Thanks for your help
> Stefano
>
>