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78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
/**
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* Copyright 2013-2022 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN 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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* srsRAN 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 SRSUE_SLOT_SYNC_H
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#define SRSUE_SLOT_SYNC_H
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#include "srsran/interfaces/radio_interfaces.h"
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#include "srsran/interfaces/ue_nr_interfaces.h"
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#include "srsran/radio/rf_buffer.h"
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#include "srsran/radio/rf_timestamp.h"
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#include "srsran/srsran.h"
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namespace srsue {
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namespace nr {
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class slot_sync
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{
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public:
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struct args_t {
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double max_srate_hz = 1.92e6;
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uint32_t nof_rx_channels = 1;
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srsran_subcarrier_spacing_t ssb_min_scs = srsran_subcarrier_spacing_15kHz;
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bool disable_cfo = false;
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float pbch_dmrs_thr = 0.0f; ///< PBCH DMRS correlation detection threshold (0 means auto)
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float cfo_alpha = 0.0f; ///< CFO averaging alpha (0 means auto)
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int thread_priority = -1;
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};
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slot_sync(srslog::basic_logger& logger);
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~slot_sync();
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bool init(const args_t& args, stack_interface_phy_nr* stack_, srsran::radio_interface_phy* radio_);
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int set_sync_cfg(const srsran_ue_sync_nr_cfg_t& cfg);
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int recv_callback(srsran::rf_buffer_t& rf_buffer, srsran_timestamp_t* timestamp);
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bool run_sfn_sync();
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bool run_camping(srsran::rf_buffer_t& buffer, srsran::rf_timestamp_t& timestamp);
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void run_stack_tti();
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srsran_slot_cfg_t get_slot_cfg();
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private:
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const static int MIN_TTI_JUMP = 1; ///< Time gap reported to stack after receiving subframe
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const static int MAX_TTI_JUMP = 1000; ///< Maximum time gap tolerance in RF stream metadata
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srslog::basic_logger& logger;
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stack_interface_phy_nr* stack = nullptr;
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srsran::radio_interface_phy* radio = nullptr;
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srsran::rf_timestamp_t last_rx_time;
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srsran_ue_sync_nr_t ue_sync_nr = {};
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srsran_timestamp_t stack_tti_ts_new = {};
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srsran_timestamp_t stack_tti_ts = {};
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bool forced_rx_time_init = true; // Rx time sync after first receive from radio
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srsran::rf_buffer_t sfn_sync_buff = {};
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srsran_slot_cfg_t slot_cfg = {};
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};
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} // namespace nr
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} // namespace srsue
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#endif // SRSUE_SLOT_SYNC_H
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