Report interference levels in RSL RF RESource INDication

This change implements general interference averaging logic for
the higher layers.  In l1sap_info_time_ind(), where we receive
TDMA time updates from BTS model, call rsl_tx_rf_res() for each
transceiver according to the interval defined by the Intave
parameter received from the BSC.  In rsl_tx_rf_res() perform
the actual averaging for each inactive logical channel, and
then send everything to the BSC over the A-bis/RSL.

The BTS model specific code needs to report the measurements
for each logical channel every 104 TDMA frames (SACCH period)
by calling gsm_lchan_interf_meas_push().

Change-Id: Id80fdbef087de625149755165c025c0a9563dc85
Related: SYS#5313, OS#1569

1 files changed, 18 insertions, 0 deletions

diff --git a/include/osmo-bts/gsm_data.h b/include/osmo-bts/gsm_data.h
index 6ce5c3b7..808b48a0 100644
--- a/include/osmo-bts/gsm_data.h
+++ b/include/osmo-bts/gsm_data.h
@@ -337,6 +337,9 @@ struct gsm_lchan {
 			/* standard deviation of toa256 value during measurement period */
 			uint16_t toa256_std_dev;
 		} ext;
+		/* Interference levels reported by PHY (in dBm) */
+		int16_t interf_meas_dbm[31]; /* Intave max is 31 */
+		uint8_t interf_meas_num;
 	} meas;
 	struct {
 		struct amr_multirate_conf amr_mr;
@@ -537,6 +540,9 @@ uint8_t gsm_lchan2chan_nr(const struct gsm_lchan *lchan);
 uint8_t gsm_lchan_as_pchan2chan_nr(const struct gsm_lchan *lchan,
 				   enum gsm_phys_chan_config as_pchan);
 
+void gsm_lchan_interf_meas_push(struct gsm_lchan *lchan, int dbm);
+int gsm_lchan_interf_meas_calc_band(struct gsm_lchan *lchan);
+
 #define BSIC2BCC(bsic) ((bsic) & 0x07)
 #define BTS_TSC(bts) BSIC2BCC((bts)->bsic)
 
@@ -558,4 +564,16 @@ int conf_lchans_as_pchan(struct gsm_bts_trx_ts *ts,
 
 bool ts_is_pdch(const struct gsm_bts_trx_ts *ts);
 
+static inline bool lchan_is_dcch(const struct gsm_lchan *lchan)
+{
+	switch (lchan->type) {
+	case GSM_LCHAN_SDCCH:
+	case GSM_LCHAN_TCH_F:
+	case GSM_LCHAN_TCH_H:
+		return true;
+	default:
+		return false;
+	}
+}
+
 #endif /* _GSM_DATA_H */