[Tinyos-help] Re: Is it possible to change a collection tree's root?

[Philip Levis]

On Aug 3, 2007, at 1:57 PM, John Griessen wrote:

> Philip Levis wrote:
>> On Aug 1, 2007, at 4:38 AM, Hugo Sousa wrote:
>  Isn't CTP
>>> prepared to handle tree root changes? What about topology changes?
>> In theory, it should handle tree root changes and topology changes  
>> fine. We've certainly tested the latter in testbeds, and I've  
>> tested the former in simulation.
>
> What if the radio signal strengths are so large they all overlap  
> eachother?  That could make for bad initial cost  
> calculations...maybe even oscillations of "lowest cost route" chosen.

I don't understand. How would a dense network lead to oscillations?  
Or are you assuming RF interference causing signal strength to vary  
wildly? CTP does not use signal strength.

Phil