To answer my own question: The problem is the noise generation of tossim, where I used the meyer files to generate it. The noise level in those file are rather large. I think they must be fine to simulate an office environment with some AP interference. But, I don't want to have harsch conditions all the time. (a -40db noise, in tossim, pure jamming). In average, the noise -85 db, where in other simulations/papers, noise level is around -100 db. So that was why I had a connectivity of a few meters using LinkLayerModel.java.
The Wiki is quite misleading, in my opinion. Stating that there are spikes at -86 dbm, when they are in fact more dirac-like, topping at -40. I just created a user account will change that.. Maybe the floor is at -98, but there are a lot of planes at -80 dbm.. And 16 dbm is quite a lot. Cheers, Alban 2009/2/17 Alban Hessler <[email protected]>: > Hi, > > The LinkLayerModel tool allows to create a grid from a topology file, > stating that the unit is the meter. But from that statement, it seems > that for default settings as proposed in the tutorial, the range of > transmission is about from 5 to 10 meters only. In my outdoors > settings with Micaz, I could have good connectivity with a range of 40 > m. So why is there such a difference? Is the unit finally not meters? > > I tried to play around with the fading exponent to have something that > match my experience, but not sure if it's a good approach. > > In the very end, what matters is the connectivity, but still I would > like to have an answer on that. > > Thank you, > > Alban > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
