Odd RTP behavior in case of bad / missing speech frames
I'm testing the osmo-bts-trx receiver behavior under a variety of conditions.
In case osmo-trx fails to send us some bursts, or in case such bursts are lost, we are seeing a behavior in which the RTP packets on Abis are sent in irregular intervals.
The normal behavior (all bursts from osmo-trx arriving) looks like this:
However, when 8 consecutive burst are dropped at every 10th 26-multiframe, we get:
So whenever the bursts are lost, we get the related RTP packets 44-48ms after the previous one, as opposed to the normal ~20ms