I did it in ns-2.30 but some modifications are needed in the code. I see if I can upload it on my web site with some instructions and simulation sripts. br -- Georgios Kioumourtzis,MSc Computer Engineering and Informatics Department University of Patras, Greece alt email: gkioumou at ceid.upatras.gr URL:http://gkioumou.googlepages.com/home