Libertas power saving mode?

[Holger Schurig]

> And why it is not possible to use power save mode when the
> mesh is on?

When you're associated to an AP, you know then the AP sends it 
beacon. In the beacon, the APs tell you if they have data for 
you or not. So you can say "Ok, now I sleep for 95 ms, because 
then the next beacon is due". Then you wake up, waiting for the 
beacon. If in this beacon there's marker "New data for you!", 
you sleep again. Otherwise, the firmware sends a "I'm awake" 
packet to the AP and get's up.


In a mesh you don't beforehand when data cames in. You could 
theoretically sleep as well, but then data for or throught you 
will simply be discarded.

You could change your mesh protocol so that you can tell your 
neightbors that you're sleeping, so that they would buffer your 
packets while you sleep. But I'm not sure if this copes well 
with a self-reorganizating mesh network.