[Tinyos-help] ctp details

[João Paulo Amaro da Costa Luz Carneiro]

Hi,
Where can I find more details about the ctp? I read both the tutorial  
and teps but I would like to find out more details such as:
In a network with multiple roots:
- how is a sender informed of an existing receiver?
- how does a node decide which root to send to?
- what happens if the destination root ceases to exist (after failing  
silently?), how does the protocol ensures the delivery of the packet  
to some other root and how is the tree updated for the following  
transmissions?
- when a new receiver joins the network, does it announce its  
presence? how are the trees reorganized?

Best regards,

Joao