[Tinyos-help] help with simulations

[Philip Levis]

On Jul 4, 2006, at 1:43 AM, Munaretto, Daniel wrote:

> Hi all,
>        i'm upset about Tossim simulations. I have to use "- 
> rf=lossy" option by bash to modify the radius and distance factor  
> directly on TinyViz interface.
> But, at the same time, you lose packets on collisions cause of this  
> lossy option, so the obtained results aren't right (for example the  
> packet delivery ratio).It's bad for simulating flooding networks  
> where you want to create chains or other topologies where nodes  
> aren't in the same range of all network nodes.

Simply put, packet deliveries aren't independent in a wireless  
network. That's why they're hard. If you want the PRR to be  
independent of concurrent transmissions, then you need to use a wired  
network with 1-to-1 dedicated links. You're essentially saying "I  
want to remove one of the fundamental challenges of wireless  
networking."

Phil