signal quality in osmo-pcu

Harald Welte laforge at gnumonks.org
Thu Jul 21 06:14:37 UTC 2016


Hi Max,

On Tue, Jul 19, 2016 at 11:44:45AM +0200, Max wrote:
> The question is - how exactly signal quality is obtained from dsp (on hw
> with direct dsp access) to osmo-pcu. 

The primitives received from the DSP in the sysmoBTS products are not
any different on the PCU side than on the BTS side.  It's a
DATA-indication (GsmL1_PhDataInd_t), and that in turn contains a
GsmL1_MeasParam_t member, which has
* RSSI
* burst Timing
* link quality
* BER

see http://git.sysmocom.de/sysmo-bts/layer1-api/tree/include/gsml1prim.h
for more infoformation.

> There is clear difference between l1if_pdch_req() and
> pcu_tx_data_req() on TX path but what's the equivalent for RX?

I'm not quite sure how the transmit path should ever relate to signal
quality measurements?

-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
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