[Tinyos-help] PAcket loss in TOSSIM

[Razvan Musaloiu-E.]

Hi!

On Tue, 1 Apr 2008, prashan wanigasekara wrote:

> Hi everyone,
>
> I am using tinyos-2.x and compiling for a micaz platform in TOSSIM. I have a
> 8 node topology and when I am running my program there is a lot of
> broadcasting. But there seems to be heavy packet loss in TOSSIM. Is there a
> way to have no packet loss???
>
> 1. I thought in simulations we can have ideal to near-ideal conditions
> ......thus is there a noise.txt model I can use off the shelf that would
> give me this(no packet loss).
>
> 2. I have a very simple scenario. There are 8 nodes. Node 1 at time t=0
> broadcasts a message. But only a few nodes out of 7 get the message. In this
> case there cant be any collisions cause there is only 1 transmitter. Thus I
> am surprised that there is packet loss. Is there a way to get around this?

Even with perfect links (no noise) you can still have losses due to 
collisions. If only node 1 sends a packet at t=0 and it has links with all 
the other 7 nodes then all of them should receive them. If all the 7 also 
try to send a packet at t=0 you should see some losses.

--
Razvan ME

> I woudl greatly appreciate your help.
>
> prashan
>