From 8bde75c91d0c251468436a1f117f6b92deef82ce Mon Sep 17 00:00:00 2001
From: Vadim Yanitskiy <vyanitskiy@sysmocom.de>
Date: Wed, 16 Dec 2020 23:20:34 +0100
Subject: power_control: add new structures and default parameters

Change-Id: I7fb8ccb997490b40a061d09c241359aaabc37c4a
Related: SYS#4918
---
 include/osmocom/bsc/bts.h      |  4 +++
 include/osmocom/bsc/gsm_data.h | 70 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+)

(limited to 'include')

diff --git a/include/osmocom/bsc/bts.h b/include/osmocom/bsc/bts.h
index d2f130730..7c988a81a 100644
--- a/include/osmocom/bsc/bts.h
+++ b/include/osmocom/bsc/bts.h
@@ -470,6 +470,10 @@ struct gsm_bts {
 	/* osmocom specific FACCH/SACCH repetition mode flags set by VTY to
 	 * enable/disable certain ACCH repeation features individually */
 	struct abis_rsl_osmo_rep_acch_cap repeated_acch_policy;
+
+	/* MS/BS Power Control parameters */
+	struct gsm_power_ctrl_params ms_power_ctrl;
+	struct gsm_power_ctrl_params bs_power_ctrl;
 };
 
 #define GSM_BTS_SI2Q(bts, i)   (struct gsm48_system_information_type_2quater *)((bts)->si_buf[SYSINFO_TYPE_2quater][i])
diff --git a/include/osmocom/bsc/gsm_data.h b/include/osmocom/bsc/gsm_data.h
index 3472f39b4..f9d5736db 100644
--- a/include/osmocom/bsc/gsm_data.h
+++ b/include/osmocom/bsc/gsm_data.h
@@ -1269,4 +1269,74 @@ enum gsm48_rr_cause bsc_gsm48_rr_cause_from_rsl_cause(uint8_t c);
 
 int bsc_sccp_inst_next_conn_id(struct osmo_sccp_instance *sccp);
 
+/* MS/BS Power related measurement averaging algo */
+enum gsm_power_ctrl_meas_avg_algo {
+	GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE			= 0x00,
+	GSM_PWR_CTRL_MEAS_AVG_ALGO_UNWEIGHTED		= 0x01,
+	GSM_PWR_CTRL_MEAS_AVG_ALGO_WEIGHTED		= 0x02,
+	GSM_PWR_CTRL_MEAS_AVG_ALGO_MOD_MEDIAN		= 0x03,
+	/* EWMA is an Osmocom specific algo */
+	GSM_PWR_CTRL_MEAS_AVG_ALGO_OSMO_EWMA		= 0x04,
+};
+
+/* MS/BS Power related measurement parameters */
+struct gsm_power_ctrl_meas_params {
+	/* Thresholds (see 3GPP TS 45.008, section A.3.2.1) */
+	uint8_t lower_thresh; /* lower (decreasing) direction */
+	uint8_t upper_thresh; /* upper (increasing) direction */
+
+	/* Threshold Comparators for lower (decreasing) direction */
+	uint8_t lower_cmp_p; /* P1 for RxLev, P3 for RxQual */
+	uint8_t lower_cmp_n; /* N1 for RxLev, N3 for RxQual */
+	/* Threshold Comparators for upper (increasing) direction */
+	uint8_t upper_cmp_p; /* P2 for RxLev, P4 for RxQual */
+	uint8_t upper_cmp_n; /* N2 for RxLev, N4 for RxQual */
+
+	/* Hreqave and Hreqt (see 3GPP TS 45.008, Annex A) */
+	uint8_t h_reqave;
+	uint8_t h_reqt;
+
+	/* AVG algorithm and its specific parameters */
+	enum gsm_power_ctrl_meas_avg_algo algo;
+	union {
+		/* Exponentially Weighted Moving Average */
+		struct {
+			/* Smoothing factor: higher the value - less smoothing */
+			uint8_t alpha; /* 1 .. 99 (in %) */
+		} ewma;
+	};
+};
+
+enum gsm_power_ctrl_dir {
+	GSM_PWR_CTRL_DIR_UL, /* MS Power Control */
+	GSM_PWR_CTRL_DIR_DL, /* BS Power Control */
+};
+
+enum gsm_power_ctrl_mode {
+	/* Do not send MS/BS Power Control IEs */
+	GSM_PWR_CTRL_MODE_NONE = 0,
+	/* Send MS/BS Power IE only (with target level) */
+	GSM_PWR_CTRL_MODE_STATIC,
+	/* Send MS/BS Power [Parameters] IEs (dynamic mode) */
+	GSM_PWR_CTRL_MODE_DYN_BTS,
+};
+
+/* MS/BS Power Control Parameters */
+struct gsm_power_ctrl_params {
+	/* Power Control direction: Uplink or Downlink */
+	enum gsm_power_ctrl_dir dir;
+	/* Power Control mode to be used by the BTS */
+	enum gsm_power_ctrl_mode mode;
+
+	/* Power change step size (dynamic mode only) */
+	uint8_t inc_step_size_db; /* increasing direction */
+	uint8_t red_step_size_db; /* reducing direction */
+
+	/* Measurement averaging parameters for RxLev & RxQual */
+	struct gsm_power_ctrl_meas_params rxqual_meas;
+	struct gsm_power_ctrl_meas_params rxlev_meas;
+};
+
+extern const struct gsm_power_ctrl_params power_ctrl_params_def;
+
 #endif /* _GSM_DATA_H */
-- 
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