diff options
Diffstat (limited to 'src/osmo-bsc/bts_osmobts.c')
| -rw-r--r-- | src/osmo-bsc/bts_osmobts.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/src/osmo-bsc/bts_osmobts.c b/src/osmo-bsc/bts_osmobts.c new file mode 100644 index 000000000..078cfe7a6 --- /dev/null +++ b/src/osmo-bsc/bts_osmobts.c @@ -0,0 +1,214 @@ +/* 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 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <arpa/inet.h> + +#include <osmocom/gsm/tlv.h> + +#include <osmocom/bsc/gsm_data.h> +#include <osmocom/bsc/signal.h> +#include <osmocom/bsc/abis_nm.h> +#include <osmocom/bsc/bts.h> +#include <osmocom/abis/e1_input.h> +#include <osmocom/gsm/tlv.h> +#include <osmocom/core/msgb.h> +#include <osmocom/core/talloc.h> +#include <osmocom/bsc/gsm_data.h> +#include <osmocom/bsc/abis_nm.h> +#include <osmocom/bsc/abis_rsl.h> +#include <osmocom/bsc/debug.h> +#include <osmocom/abis/subchan_demux.h> +#include <osmocom/abis/ipaccess.h> +#include <osmocom/core/logging.h> + +extern struct gsm_bts_model bts_model_nanobts; + +static struct gsm_bts_model model_osmobts; + +static void enc_osmo_meas_proc_params(struct msgb *msg, const struct gsm_power_ctrl_params *mp) +{ + struct osmo_preproc_ave_cfg *ave_cfg; + uint8_t *ie_len; + + /* No averaging => no Measurement Averaging parameters */ + if (mp->ci_fr_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE && + mp->ci_hr_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE && + mp->ci_amr_fr_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE && + mp->ci_amr_hr_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE && + mp->ci_sdcch_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE && + mp->ci_gprs_meas.algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE) + return; + + /* (TLV) Measurement Averaging parameters for RxLev/RxQual */ + ie_len = msgb_tl_put(msg, RSL_IPAC_EIE_OSMO_MEAS_AVG_CFG); + + ave_cfg = (struct osmo_preproc_ave_cfg *) msgb_put(msg, sizeof(*ave_cfg)); + +#define ENC_PROC(PARAMS, TO, TYPE) do { \ + (TO)->TYPE.ave_enabled = (PARAMS)->TYPE##_meas.algo != GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE; \ + if ((TO)->TYPE.ave_enabled) { \ + /* H_REQAVE and H_REQT */ \ + (TO)->TYPE.h_reqave = (PARAMS)->TYPE##_meas.h_reqave & 0x1f; \ + (TO)->TYPE.h_reqt = (PARAMS)->TYPE##_meas.h_reqt & 0x1f; \ + /* Averaging method and parameters */ \ + (TO)->TYPE.ave_method = ((PARAMS)->TYPE##_meas.algo - 1) & 0x07; \ + switch ((PARAMS)->TYPE##_meas.algo) { \ + case GSM_PWR_CTRL_MEAS_AVG_ALGO_OSMO_EWMA: \ + msgb_v_put(msg, (PARAMS)->TYPE##_meas.ewma.alpha); \ + break; \ + case GSM_PWR_CTRL_MEAS_AVG_ALGO_WEIGHTED: \ + case GSM_PWR_CTRL_MEAS_AVG_ALGO_MOD_MEDIAN: \ + /* FIXME: unknown format */ \ + break; \ + case GSM_PWR_CTRL_MEAS_AVG_ALGO_UNWEIGHTED: \ + case GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE: \ + /* No parameters here */ \ + break; \ + } \ + } \ + } while (0) + ENC_PROC(mp, ave_cfg, ci_fr); + ENC_PROC(mp, ave_cfg, ci_hr); + ENC_PROC(mp, ave_cfg, ci_amr_fr); + ENC_PROC(mp, ave_cfg, ci_amr_hr); + ENC_PROC(mp, ave_cfg, ci_sdcch); + ENC_PROC(mp, ave_cfg, ci_gprs); +#undef ENC_PROC + + /* Update length part of the containing IE */ + *ie_len = msg->tail - (ie_len + 1); +} + +/* Appends Osmocom specific extension IEs into RSL_IE_MS_POWER_PARAM */ +void osmobts_enc_power_params_osmo_ext(struct msgb *msg, const struct gsm_power_ctrl_params *cp) +{ + struct osmo_preproc_pc_thresh *osmo_thresh; + struct osmo_preproc_pc_comp *osmo_thresh_comp; + uint8_t *ie_len; + + /* (TLV) Measurement Averaging Configure (C/I) */ + enc_osmo_meas_proc_params(msg, cp); + + /* (TLV) Thresholds (C/I) */ + ie_len = msgb_tl_put(msg, RSL_IPAC_EIE_OSMO_MS_PWR_CTL); + osmo_thresh = (struct osmo_preproc_pc_thresh *) msgb_put(msg, sizeof(*osmo_thresh)); + #define ENC_THRESH_CI(TYPE) \ + do { \ + if (cp->TYPE##_meas.enabled) { \ + osmo_thresh->l_##TYPE = cp->TYPE##_meas.lower_thresh; \ + osmo_thresh->u_##TYPE = cp->TYPE##_meas.upper_thresh; \ + } else { \ + osmo_thresh->l_##TYPE = 0; \ + osmo_thresh->u_##TYPE = 0; \ + } \ + } while (0) + ENC_THRESH_CI(ci_fr); + ENC_THRESH_CI(ci_hr); + ENC_THRESH_CI(ci_amr_fr); + ENC_THRESH_CI(ci_amr_hr); + ENC_THRESH_CI(ci_sdcch); + ENC_THRESH_CI(ci_gprs); + #undef ENC_THRESH_CI + /* Update length part of the containing IE */ + *ie_len = msg->tail - (ie_len + 1); + + /* (TLV) PC Threshold Comparators (C/I) */ + ie_len = msgb_tl_put(msg, RSL_IPAC_EIE_OSMO_PC_THRESH_COMP); + osmo_thresh_comp = (struct osmo_preproc_pc_comp *) msgb_put(msg, sizeof(*osmo_thresh_comp)); + #define ENC_THRESH_CI(TYPE) \ + do { \ + if (cp->TYPE##_meas.enabled) { \ + osmo_thresh_comp->TYPE.lower_p = cp->TYPE##_meas.lower_cmp_p & 0x1f; \ + osmo_thresh_comp->TYPE.lower_n = cp->TYPE##_meas.lower_cmp_n & 0x1f; \ + osmo_thresh_comp->TYPE.upper_p = cp->TYPE##_meas.upper_cmp_p & 0x1f; \ + osmo_thresh_comp->TYPE.upper_n = cp->TYPE##_meas.upper_cmp_n & 0x1f; \ + } else { \ + osmo_thresh_comp->TYPE.lower_p = 0; \ + osmo_thresh_comp->TYPE.lower_n = 0; \ + osmo_thresh_comp->TYPE.upper_p = 0; \ + osmo_thresh_comp->TYPE.upper_n = 0; \ + } \ + } while (0) + ENC_THRESH_CI(ci_fr); + ENC_THRESH_CI(ci_hr); + ENC_THRESH_CI(ci_amr_fr); + ENC_THRESH_CI(ci_amr_hr); + ENC_THRESH_CI(ci_sdcch); + ENC_THRESH_CI(ci_gprs); + #undef ENC_THRESH_CI + /* Update length part of the containing IE */ + *ie_len = msg->tail - (ie_len + 1); +} + +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; + model_osmobts.name = "osmo-bts"; + model_osmobts.type = GSM_BTS_TYPE_OSMOBTS; + + /* 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); + memset(model_osmobts.features.data, 0, model_osmobts.features.data_len); + + /* Adjust bts_init/bts_model_init in OsmoBTS to report new features. + * See also: doc/bts-features.txt */ + + model_osmobts.nm_att_tlvdef.def[NM_ATT_OSMO_NS_LINK_CFG].type = TLV_TYPE_TL16V; + + return gsm_bts_model_register(&model_osmobts); +} |