Mohammed Abu Hajar schrieb: > > Yes, realy I want to simulate the performance of DSR routing protocol using > NS-2 , I did that and compare my results I got with a published paper called > " Performance omparison of Two On-Demand Routing Protocols for Ad Hoc > Networks ", but unfortunatly there were some differences among figures > relayed to: Normalize Routing Load , Average End to End Delay, Packet > delivery Ratio. I am using the same parameters used in the paper , but there > is a statement menssion in the peper talks " > You may use the same parameters - but do you use the same version of ns-2? Small code changes can have a significant effect. > The radio model uses > characteristics similar to a commercial radio interface, > Lucent’s WaveLAN [14, 15]. WaveLAN is modeled as a > shared-media radio with a nominal bit rate of 2 Mb/s and a > nominal radio range of 250 m." > I am didn't understand how I write this parameter in my TCL script file , > So I think the differences in my results related to this point. > If I remember right, these are the default values included in tcl/lib/ns-default.tcl or ns-node.tcl . Look there or in the tutorials mentioned in the ns-2 wiki for examples to setup wireless nodes. If you use a current ns-2 version, my guess is that the code makes most of the difference.
Personally, I never used this setup because a) the Lucent WaveLAN adapter has significant differences to currrent WiFi cards and b) all models that include a fixed communication range deliver results not applicable to real-world scenarios / applications. My personal advise - at least you the ShadowPropagation model. It is not perfect but creates many "problems" you have to cope with in the real world. More about this topic and the setup used for my research can be found in my thesis at http://diglib.uni-magdeburg.de/Dissertationen/2006/danmahrenholz.htm Daniel. -- Dr.-Ing. Daniel Mahrenholz rt-solutions.de GmbH Oberländer Ufer 190a D-50968 Köln Web: www.rt-solutions.de rt-solutions.de networks you can trust.
