[Paparazzi-devel] Multi tiered telemetry solution

[Tilman Baumann]

I have been wondering for a while if it would be feasible to have some 
kind of tiered structure for different telemetry links.
Most links have their distinct advantages but also disadvantages.

I was thinking to have WLAN for short range via on-board computer. 
(Telemetry via UDP and video/image capture)
RF for mid range.
And 3g/UMTS for fall-back. (Has anyone tried this before on paparazzi? 
ArduPilot seems to have that as a viable option.)

Those links have obviously very different round trip times, bandwidth 
and reliability. So the amount of data sent back would have to be 
dynamically adapted.
I don't think the code has such a concept yet, but does anyone think it 
can be easily done?
I'm actually contemplating some kind of bridge right now that takes a 
full speed telemetry downlink via serial that has some knowledge about 
the message types in order to chop off messages that will not fit the 
selected downlink.

I'm just thinking loud here. But if the ideas are viable I would perhaps 
like to invest some energy to test those...

Cheers
 Tilman