Introduce BS and MS power control related functions
* add bts->band field plus corresponding VTY and commandline argument
* add trx->nominal_power and trx->max_power_red fields
* add rsl_chan_bs_power_ctrl() to control TRX RF power for a given TS
* add rsl_chan_ms_power_ctrl() to control MS RF power for a given lchan.
diff --git a/openbsc/src/abis_rsl.c b/openbsc/src/abis_rsl.c
index 4b2a7fc..5c1967d 100644
--- a/openbsc/src/abis_rsl.c
+++ b/openbsc/src/abis_rsl.c
@@ -356,6 +356,95 @@
return abis_rsl_sendmsg(msg);
}
+int rsl_chan_bs_power_ctrl(struct gsm_lchan *lchan, unsigned int fpc, int db)
+{
+ struct abis_rsl_dchan_hdr *dh;
+ struct msgb *msg = rsl_msgb_alloc();
+ u_int8_t chan_nr = lchan2chan_nr(lchan);
+
+ db = abs(db);
+ if (db > 30)
+ return -EINVAL;
+
+ lchan->bs_power = db/2;
+ if (fpc)
+ lchan->bs_power |= 0x10;
+
+ dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
+ init_dchan_hdr(dh, RSL_MT_BS_POWER_CONTROL);
+ dh->chan_nr = chan_nr;
+
+ msgb_tv_put(msg, RSL_IE_BS_POWER, lchan->bs_power);
+
+ msg->trx = lchan->ts->trx;
+
+ return abis_rsl_sendmsg(msg);
+}
+
+/* determine power control level for given dBm value, as indicated
+ * by the tables in chapter 4.1.1 of GSM TS 05.05 */
+static int ms_pwr_ctl_lvl(struct gsm_bts *bts, unsigned int dbm)
+{
+ switch (bts->band) {
+ case GSM_BAND_400:
+ case GSM_BAND_900:
+ case GSM_BAND_850:
+ if (dbm >= 39)
+ return 0;
+ else if (dbm < 5)
+ return 19;
+ else
+ return 2 + ((39 - dbm) / 2);
+ break;
+ case GSM_BAND_1800:
+ if (dbm >= 36)
+ return 29;
+ else if (dbm >= 34)
+ return 30;
+ else if (dbm >= 32)
+ return 31;
+ else
+ return (30 - dbm) / 2;
+ break;
+ case GSM_BAND_1900:
+ if (dbm >= 33)
+ return 30;
+ else if (dbm >= 32)
+ return 31;
+ else
+ return (30 - dbm) / 2;
+ break;
+ }
+ return -EINVAL;
+}
+
+int rsl_chan_ms_power_ctrl(struct gsm_lchan *lchan, unsigned int fpc, int dbm)
+{
+ struct abis_rsl_dchan_hdr *dh;
+ struct msgb *msg = rsl_msgb_alloc();
+ u_int8_t chan_nr = lchan2chan_nr(lchan);
+ int ctl_lvl;
+
+ ctl_lvl = ms_pwr_ctl_lvl(lchan->ts->trx->bts, dbm);
+ if (ctl_lvl < 0)
+ return ctl_lvl;
+
+ lchan->ms_power = ctl_lvl;
+
+ if (fpc)
+ lchan->ms_power |= 0x20;
+
+ dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
+ init_dchan_hdr(dh, RSL_MT_MS_POWER_CONTROL);
+ dh->chan_nr = chan_nr;
+
+ msgb_tv_put(msg, RSL_IE_MS_POWER, lchan->ms_power);
+
+ msg->trx = lchan->ts->trx;
+
+ return abis_rsl_sendmsg(msg);
+}
+
/* Chapter 8.4.1 */
#if 0
int rsl_chan_activate(struct gsm_bts_trx *trx, u_int8_t chan_nr,