To reformulate my problem I will take an example :

A sensor have the choice between two parents to connect itself to a
collection data path.
By default it chooses the bad parent in the sense that this one reads very
different datas. (assuming that a good parent is a sensor that read similar
datas)

So what I would like to do is that when the sensor overhear (snoop) a data
message from the good potential parent, it indicates to the Ctp mechanism
that it should consider this sensor as a better parent than the current one.

It would be like not only taking into consideration ETX but this global
behavior too.

Is there any way to perform that ?

2009/4/28 Rémi Villé <[email protected]>

> In fact I would like to have a routing corresponding to my network layer,
> in the 4-bit wireless link estimation, put the compare bit at 1 when I
> receive a similar data from a neighbor...
>
> I don't know what interface, command or event to use, and I have no example
> to do this sort of thing.
>
> 2009/4/27 Rémi Villé <[email protected]>
>
> Hi,
>>
>> I'm new with TinyOS, I used Collection with the MultihopOscilloscope
>> tutorial, I have seen some TEP on Collection, Ctp and LEEP.
>> I have understood Collection performs less hop data paths and use ETX to
>> use a link instead of an other one regarding to the ratio of received
>> messages and lost ones.
>>
>> I would like to have a customized Collection which takes into
>> consideration sensed data, i.e. not just good quality link but e.g. if a
>> neighbor node senses data close than current one (for aggregation).
>>
>> What should I use in TinyOS features to perform that, is there any
>> component to do it simply, or should I modify Ctp or LEEP components ?
>>
>> Thanks in advance,
>>
>> Rémi
>>
>
>
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