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