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(a)sysmocom.de> wrote:

Hi Tom, On Mon, Aug 01, 2016 at 03:57:36PM -0700, Tom Tsou wrote: This long-time average noise level would make sens on a per-timeslot basis, or evne on a per-lchan basis once osmo-bts started to send uplink interference indications to the BSC (which currently it doesn't, on any BTS model). The background of this current question is GPRS, where an average over multiple blocks inside a timeslot is not useful, as the resources are scheduled fully dynamic. So to me, averaging over more than the four bursts of one block seems to make sense only in the context of circuit-switched channels, where the dedicated channel of a single MS is averaged. But for GPRS, every block might be a different MS, and the interference into the specific dynamically allocated uplink blocks within the TBF might be completely different than for other blocks scheduled to other MS. I'm assuming that one of the most common interference patterns in GSM/GPRS is from other networks/cells, which most commonly use frequency hopping, and thus the uplink interference from one block to another (on a non-hopping OsmoBTS) could be significantly different. Literature describes GPRS link adation algorithms based on either CIR or BLER, so we should have both available in the PCU to play with different algorithms. For EGPRS, the values we need to report into the PCU (specifically the link adaption) are MEAN_BEP and CV_BEP. Regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

Calculation looks correct. Have you tested it? IIRC I added tests for BER calculations which you could extend. -- Regards, Alexander Chemeris CEO Fairwaves, Inc. https://fairwaves.co On Aug 4, 2016 19:18, "Max" <msuraev(a)sysmocom.de> wrote: