/** * * \section COPYRIGHT * * Copyright 2013-2015 Software Radio Systems Limited * * \section LICENSE * * This file is part of the srsUE library. * * srsUE 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. * * srsUE 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. * * A copy of the GNU Affero General Public License can be found in * the LICENSE file in the top-level directory of this distribution * and at http://www.gnu.org/licenses/. * */ #ifndef UEPHYRECV_H #define UEPHYRECV_H #include #include "srslte/srslte.h" #include "srslte/common/log.h" #include "srslte/common/threads.h" #include "srslte/common/thread_pool.h" #include "srslte/common/tti_sync_cv.h" #include "srslte/radio/radio_multi.h" #include "phy/prach.h" #include "phy/phch_worker.h" #include "phy/phch_common.h" #include "srslte/interfaces/ue_interfaces.h" namespace srsue { typedef _Complex float cf_t; class phch_recv : public thread, public chest_feedback_itf { public: phch_recv(); ~phch_recv(); void init(srslte::radio_multi* radio_handler, mac_interface_phy *mac,rrc_interface_phy *rrc, prach *prach_buffer, srslte::thread_pool *_workers_pool, phch_common *_worker_com, srslte::log* _log_h, srslte::log *_log_phy_lib_h, uint32_t nof_rx_antennas, uint32_t prio, int sync_cpu_affinity = -1); void stop(); void set_agc_enable(bool enable); void set_earfcn(std::vector earfcn); void force_freq(float dl_freq, float ul_freq); void reset_sync(); void cell_search_start(); void cell_search_next(bool reset = false); void cell_select(uint32_t earfcn, srslte_cell_t cell); bool cell_handover(srslte_cell_t cell); void meas_reset(); int meas_start(uint32_t earfcn, int pci); int meas_stop(uint32_t earfcn, int pci); uint32_t get_current_tti(); bool status_is_sync(); // from chest_feedback_itf void in_sync(); void out_of_sync(); void set_cfo(float cfo); void set_time_adv_sec(float time_adv_sec); void get_current_cell(srslte_cell_t *cell, uint32_t *earfcn = NULL); const static int MUTEX_X_WORKER = 4; double set_rx_gain(double gain); int radio_recv_fnc(cf_t *data[SRSLTE_MAX_PORTS], uint32_t nsamples, srslte_timestamp_t *rx_time); int scell_recv_fnc(cf_t *data[SRSLTE_MAX_PORTS], uint32_t nsamples, srslte_timestamp_t *rx_time); private: std::vector earfcn; void reset(); void radio_error(); void set_ue_sync_opts(srslte_ue_sync_t *q, float cfo); void run_thread(); void set_sampling_rate(); bool set_frequency(); bool set_cell(); void cell_search_inc(); void cell_reselect(); float get_cfo(); uint32_t new_earfcn; srslte_cell_t new_cell; bool running; // Class to run cell search class search { public: typedef enum {CELL_NOT_FOUND, CELL_FOUND, ERROR, TIMEOUT} ret_code; ~search(); void init(cf_t *buffer[SRSLTE_MAX_PORTS], srslte::log *log_h, uint32_t nof_rx_antennas, phch_recv *parent); void reset(); float get_last_gain(); float get_last_cfo(); void set_N_id_2(int N_id_2); void set_agc_enable(bool enable); ret_code run(srslte_cell_t *cell); private: phch_recv *p; srslte::log *log_h; cf_t *buffer[SRSLTE_MAX_PORTS]; srslte_ue_cellsearch_t cs; srslte_ue_mib_sync_t ue_mib_sync; int force_N_id_2; }; // Class to synchronize system frame number class sfn_sync { public: typedef enum {IDLE, SFN_FOUND, SFX0_FOUND, ERROR, TIMEOUT} ret_code; ~sfn_sync(); void init(srslte_ue_sync_t *ue_sync, cf_t *buffer[SRSLTE_MAX_PORTS], srslte::log *log_h, uint32_t timeout = SYNC_SFN_TIMEOUT); void reset(); bool set_cell(srslte_cell_t cell); ret_code run_subframe(srslte_cell_t *cell, uint32_t *tti_cnt, bool sfidx_only = false); private: srslte::log *log_h; srslte_ue_sync_t *ue_sync; cf_t *buffer[SRSLTE_MAX_PORTS]; srslte_ue_mib_t ue_mib; uint32_t cnt; uint32_t timeout; const static uint32_t SYNC_SFN_TIMEOUT = 80; }; // Class to perform cell measurements class measure { // TODO: This class could early stop once the variance between the last N measurements is below 3GPP requirements public: typedef enum {IDLE, MEASURE_OK, ERROR} ret_code; ~measure(); void init(cf_t *buffer[SRSLTE_MAX_PORTS], srslte::log *log_h, uint32_t nof_rx_antennas, uint32_t nof_subframes = RSRP_MEASURE_NOF_FRAMES); void reset(); void set_cell(srslte_cell_t cell); ret_code run_subframe(uint32_t sf_idx); ret_code run_subframe_sync(srslte_ue_sync_t *ue_sync, uint32_t sf_idx); ret_code run_multiple_subframes(cf_t *buffer, int offset, uint32_t sf_idx, uint32_t nof_sf); float rssi(); float rsrp(); float rsrq(); float snr(); uint32_t frame_st_idx(); void set_rx_gain_offset(float rx_gain_offset); private: srslte::log *log_h; srslte_ue_dl_t ue_dl; cf_t *buffer[SRSLTE_MAX_PORTS]; uint32_t cnt; uint32_t nof_subframes; uint32_t current_prb; float rx_gain_offset; float mean_rsrp, mean_rsrq, mean_snr, mean_rssi; uint32_t final_offset; const static int RSRP_MEASURE_NOF_FRAMES = 5; }; // Class to receive secondary cell class scell_recv { public: const static int MAX_CELLS = 8; typedef struct { uint32_t pci; float rsrp; float rsrq; uint32_t offset; } cell_info_t; void init(srslte::log *log_h, bool sic_pss_enabled, uint32_t max_sf_window); void deinit(); void reset(); int find_cells(cf_t *input_buffer, float rx_gain_offset, srslte_cell_t current_cell, uint32_t nof_sf, cell_info_t found_cells[MAX_CELLS]); private: cf_t *sf_buffer[SRSLTE_MAX_PORTS]; srslte::log *log_h; srslte_sync_t sync_find; bool sic_pss_enabled; uint32_t current_fft_sz; measure measure_p; }; /* TODO: Intra-freq measurements can be improved by capturing 200 ms length signal and run cell search + * measurements offline using sync object and finding multiple cells for each N_id_2 */ // Class to perform intra-frequency measurements class intra_measure : public thread { public: ~intra_measure(); void init(phch_common *common, rrc_interface_phy *rrc, srslte::log *log_h); void stop(); void add_cell(int pci); void rem_cell(int pci); void set_primay_cell(uint32_t earfcn, srslte_cell_t cell); void clear_cells(); int get_offset(uint32_t pci); void write(uint32_t tti, cf_t *data, uint32_t nsamples); private: void run_thread(); const static int INTRA_FREQ_MEAS_PRIO = DEFAULT_PRIORITY + 5; scell_recv scell; rrc_interface_phy *rrc; srslte::log *log_h; phch_common *common; uint32_t current_earfcn; uint32_t current_sflen; srslte_cell_t primary_cell; std::vector active_pci; srslte::tti_sync_cv tti_sync; cf_t *search_buffer; scell_recv::cell_info_t info[scell_recv::MAX_CELLS]; bool running; bool receive_enabled; bool receiving; uint32_t measure_tti; uint32_t receive_cnt; srslte_ringbuffer_t ring_buffer; }; // 36.133 9.1.2.1 for band 7 const static float ABSOLUTE_RSRP_THRESHOLD_DBM = -125; // Objects for internal use measure measure_p; search search_p; sfn_sync sfn_p; intra_measure intra_freq_meas; uint32_t current_sflen; int next_offset; uint32_t nof_rx_antennas; // Pointers to other classes mac_interface_phy *mac; rrc_interface_phy *rrc; srslte::log *log_h; srslte::log *log_phy_lib_h; srslte::thread_pool *workers_pool; srslte::radio_multi *radio_h; phch_common *worker_com; prach *prach_buffer; // Object for synchronization of the primary cell srslte_ue_sync_t ue_sync; // Buffer for primary cell samples cf_t *sf_buffer[SRSLTE_MAX_PORTS]; // Sync metrics sync_metrics_t metrics; // in-sync / out-of-sync counters uint32_t out_of_sync_cnt; uint32_t in_sync_cnt; const static uint32_t NOF_OUT_OF_SYNC_SF = 200; const static uint32_t NOF_IN_SYNC_SF = 100; // State for primary cell typedef enum { IDLE = 0, CELL_SEARCH, CELL_SELECT, CELL_RESELECT, CELL_MEASURE, CELL_CAMP, } phy_state_t; phy_state_t phy_state, prev_state; bool is_in_idle; // Sampling rate mode (find is 1.96 MHz, camp is the full cell BW) enum { SRATE_NONE=0, SRATE_FIND, SRATE_CAMP } srate_mode; float current_srate; // This is the primary cell srslte_cell_t cell; bool cell_is_set; bool started; float time_adv_sec; uint32_t tti; bool do_agc; uint32_t nof_tx_mutex; uint32_t tx_mutex_cnt; float ul_dl_factor; uint32_t current_earfcn; int cur_earfcn_index; float dl_freq; float ul_freq; }; } // namespace srsue #endif // UEPHYRECV_H