diff options
Diffstat (limited to 'src/osmo-bsc/bts_osmobts.c')
| -rw-r--r-- | src/osmo-bsc/bts_osmobts.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/osmo-bsc/bts_osmobts.c b/src/osmo-bsc/bts_osmobts.c index 1814ada3d..9813a265d 100644 --- a/src/osmo-bsc/bts_osmobts.c +++ b/src/osmo-bsc/bts_osmobts.c @@ -1,6 +1,7 @@ /* Osmocom OsmoBTS specific code */ /* (C) 2010-2012 by Harald Welte <laforge@gnumonks.org> + * (C) 2021 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de> * * All Rights Reserved * @@ -43,6 +44,35 @@ extern struct gsm_bts_model bts_model_nanobts; static struct gsm_bts_model model_osmobts; +static int power_ctrl_set_c0_power_red(const struct gsm_bts *bts, + const uint8_t red) +{ + struct abis_rsl_dchan_hdr *dh; + struct msgb *msg; + + msg = rsl_msgb_alloc(); + if (msg == NULL) + return -ENOMEM; + + LOGP(DRSL, LOGL_NOTICE, "%sabling BCCH carrier power reduction " + "operation mode for BTS%u (maximum %u dB)\n", + red ? "En" : "Dis", bts->nr, red); + + /* Abuse the standard BS POWER CONTROL message by specifying 'Common Channel' + * in the Protocol Discriminator field and 'BCCH' in the Channel Number IE. */ + dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); + dh->c.msg_discr = ABIS_RSL_MDISC_COM_CHAN; + dh->c.msg_type = RSL_MT_BS_POWER_CONTROL; + dh->ie_chan = RSL_IE_CHAN_NR; + dh->chan_nr = RSL_CHAN_BCCH; + + msgb_tv_put(msg, RSL_IE_BS_POWER, red / 2); + + msg->dst = bts->c0->rsl_link_primary; + + return abis_rsl_sendmsg(msg); +} + int bts_model_osmobts_init(void) { model_osmobts = bts_model_nanobts; @@ -52,6 +82,9 @@ int bts_model_osmobts_init(void) /* Unlike nanoBTS, osmo-bts does support SI2bis and SI2ter fine */ model_osmobts.force_combined_si = false; + /* Power control API */ + model_osmobts.power_ctrl_set_c0_power_red = &power_ctrl_set_c0_power_red; + model_osmobts.features.data = &model_osmobts._features_data[0]; model_osmobts.features.data_len = sizeof(model_osmobts._features_data); |