Burst timing is also passed from osmo-trx to osmo-bts, so should be trivial to pass through.
For C/I we need a comment from Thomas. Currently we don't have it on the osmo-trx interface and I'm not even sure we calculate it.
Please excuse typos. Written with a touchscreen keyboard.
-- Regards, Alexander Chemeris CEO Fairwaves, Inc. https://fairwaves.co
On Jul 29, 2016 12:59, "Max" msuraev@sysmocom.de wrote:
Hi.
I'm working on http://projects.osmocom.org/issues/1616 and wonder about $subj.
In case of sysmobts, osmo-pcu obtain this data directly from DSP:
- RSSI (dBm)
- burst timing (in quarter of bits)
- link quality (in dB)
- BER
The first and last value seems to be easy from what I see in src/osmo-bts-trx/scheduler_trx.c What about burst timing (necessary to compute TA in the absence of PTCCH) and link quality (measure of C / I where C is carrier and I is interference power) - how can I compute those or some estimator to those values?
-- Max Suraev msuraev@sysmocom.de http://www.sysmocom.de/ =======================================================================
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