diff options
Diffstat (limited to 'include/osmo-bts/power_control.h')
-rw-r--r-- | include/osmo-bts/power_control.h | 80 |
1 files changed, 79 insertions, 1 deletions
diff --git a/include/osmo-bts/power_control.h b/include/osmo-bts/power_control.h index ed9f8919..e8b035da 100644 --- a/include/osmo-bts/power_control.h +++ b/include/osmo-bts/power_control.h @@ -1,8 +1,86 @@ #pragma once #include <stdint.h> -#include <osmo-bts/gsm_data.h> +#include <stdbool.h> +/* 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; + }; +}; + +/* MS/BS Power Control parameters */ +struct gsm_power_ctrl_params { + /* Minimum interval between power level changes */ + uint8_t ctrl_interval; /* 1 step is 2 SACCH periods */ + + /* Power change step size (maximum) */ + 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; + + /* Measurement averaging parameters for C/I, per chan type */ + struct gsm_power_ctrl_meas_params ci_fr_meas; + struct gsm_power_ctrl_meas_params ci_hr_meas; + struct gsm_power_ctrl_meas_params ci_amr_fr_meas; + struct gsm_power_ctrl_meas_params ci_amr_hr_meas; + struct gsm_power_ctrl_meas_params ci_sdcch_meas; + struct gsm_power_ctrl_meas_params ci_gprs_meas; +}; + +/* Measurement pre-processing state */ +struct gsm_power_ctrl_meas_proc_state { + /* Number of measurements processed */ + unsigned int meas_num; + /* Algorithm specific data */ + union { + struct { + /* Scaled up 100 times average value */ + int Avg100; + } ewma; + }; +}; + +/* Default MS/BS Power Control parameters */ +extern const struct gsm_power_ctrl_params power_ctrl_params_def; +void power_ctrl_params_def_reset(struct gsm_power_ctrl_params *params, bool is_bs_pwr); + +struct gsm_lchan; int lchan_ms_pwr_ctrl(struct gsm_lchan *lchan, const uint8_t ms_power_lvl, const int8_t ul_rssi_dbm, |