[Babel-users] fun with babeld, and tools for measuring ETX for Babel meshes

[Henning Rogge]

On Wed, Jul 2, 2014 at 2:09 PM, Juliusz Chroboczek
<jch at pps.univ-paris-diderot.fr> wrote:
>> The best would be to get the RX power right from the radio.  Does babel
>> currently get any info that way?
>
> No.  Contrary to pretty much everyone's intuition, RSSI is not a good
> predictor of packet loss.

Yes...

RSSI is a good indicator in mobile scenarios that something changed,
but not what kind of change to expect.

> Now the kernel is already measuring stuff in order to choose a rate.  The
> current plan is to ask the gentle kernel for its conclusions, and pick
> a metric based on that (idea due to Dave).  The data is already being
> exported by netlink in recent kernels (code due to Antonio Quartulli), so
> it should be a fairly simple thing to do.

How much unicast traffic does Babel send over links to each neighbors
on its own?

Henning Rogge