[Ns-developers] Announcement of NS-2 802.11Ext

[Francisco J. Ros]

Hello Felix,

First, I'd like to thank you (and your colleagues) for releasing such a useful 
implementation under a free software license. Hope to see this within the 
official NS-2 release soon :)

I've been playing with the code for the last days and have performed some 
simple simulations. I've also looked at the MAC code, where didn't find bugs 
or misbehaviors.

However, I'm facing a problem probably related with the PHY layer. Attached 
you can find a script which establishes a CBR flow between 2 nodes in a 10 
nodes static scenario using AODV. The simulation runs as expected when the 
RTS/CTS exchange is disabled, but when it is enabled, the AODV RREP issued by 
the destination never reaches its next hop. It sends an ARP REQUEST which 
arrives at the next hop. In order to answer with an ARP REPLY, the next hop 
issues an RTS. This is received by the destination, which sends the 
corresponding CTS. But this message is never received by the next hop at the 
PHY level.

I'm not sure if the problem described above is because of a bad configuration 
or a bug in the code. Any idea about this regard would be more than welcome.

Finally, I'd like to point out two little details about the documentation:

- Section 1.2.3. wlan-phy.{h|cc} must be wireless-phyExt.{h|cc}
- Section 1.3.1. It's said that several scripts are included. I couldn't find 
them though. I'm especially interested in IEEE802-11p.tcl, so it would be 
great if you could send it to me.

Regards,
fran

On Monday 07 January 2008 13:04, Felix Schmidt-Eisenlohr wrote:
> Hi all,
>
> a new version of our extension to the NS-2 wireless modules formerly
> known as "Overhaul of IEEE 802.11 modeling and simulation architecture
> in NS-2", now named "NS-2-802.11Ext", is available for download and
> testing on our website:
>
> http://dsn.tm.uni-karlsruhe.de/english/Overhaul_NS-2.php
>
> As it is planned to integrate this extension into NS-2 we kindly ask
> anyone interested to apply the patch, run some tests and give feedback
> in order to eliminate bugs, inaccuracies or unclear documentation
> issues.
>
> Thanks and best regards
>
>
> Felix
>
> --
> Dipl.-Inform. Felix Schmidt-Eisenlohr
> University of Karlsruhe (TH)
> Institute of Telematics
> Decentralized Systems and Network Services Research Group
>
> Engesserstr. 6, D-76131 Karlsruhe, Germany building 20.52, room 307
>
> phone: +49 721 608 6626
> fax:   +49 721 608 6789
> felix.schmidt-eisenlohr at kit.edu
> http://dsn.tm.uka.de

-- 
Francisco J. Ros, Ph.D. Student
Dept. of Information and Communications Engineering
University of Murcia, Murcia (Spain)

http://masimum.inf.um.es/fjrm/