Hi, Venkataramana Badarla schrieb: > I am going to use Rayleigh fading model in some of my simulations. However, > we do not have this model in NS2. If any one you have solution for this, > kindly give me the details. > > I think there is an implementation somewhere, but I can't remember where. > Further, have any one you used Shadowing model instead of Tworayground > model. > When I ran example file in tcl/ex/wireless-shadowing-test.tcl, it shows a > very large string of digits for distCST_ (i.e., carrier sense distance). Is > this a problem? If any of you have a working tcl file kindle give me. > This is not a problem. distCST_ is the distance where the propagation models stops calculating signal strength (because it will be zero) to reduce the computation time. The shadowing model includes a random variable that affects the transmission power. Even in large distances there is a (very) small chance to receive a packet. To be on the save site, distCST_ is set to a very large value in order to avoid the optimization.
You can find the setup I used for my simulations in appendix A of my thesis (http://deposit.ddb.de/cgi-bin/dokserv?idn=980478588). If you have any further questions, don't hesitate to ask me. 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.
