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89 lines
3.3 KiB
C++
89 lines
3.3 KiB
C++
/**
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* Copyright 2013-2021 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_PRACH_H
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#define SRSUE_PRACH_H
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#include "srsran/interfaces/ue_phy_interfaces.h"
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#include "srsran/radio/radio.h"
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#include "srsran/srslog/srslog.h"
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#include "srsran/srsran.h"
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#include <bitset>
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#include <mutex>
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namespace srsue {
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class prach
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{
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public:
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prach(srslog::basic_logger& logger) : logger(logger) {}
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~prach() { stop(); }
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void init(uint32_t max_prb);
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void stop();
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bool set_cell(srsran_cell_t cell, srsran_prach_cfg_t prach_cfg);
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bool prepare_to_send(uint32_t preamble_idx, int allowed_subframe = -1, float target_power_dbm = -1);
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bool is_ready_to_send(uint32_t current_tti, uint32_t current_pci);
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bool is_pending() const;
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cf_t* generate(float cfo, uint32_t* nof_sf, float* target_power = NULL);
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phy_interface_mac_lte::prach_info_t get_info() const;
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private:
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bool generate_buffer(uint32_t f_idx);
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bool is_buffer_generated(uint32_t f_idx, uint32_t preamble_index) const
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{
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return buffer_bitmask.test(f_idx * 64 + preamble_index);
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}
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void set_buffer_as_generated(uint32_t f_idx, uint32_t preamble_index)
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{
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buffer_bitmask.set(f_idx * 64 + preamble_index);
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}
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private:
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static constexpr unsigned MAX_LEN_SF = 3;
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static constexpr unsigned max_fs = 12;
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static constexpr unsigned max_preambles = 64;
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srslog::basic_logger& logger;
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srsran_prach_t prach_obj = {};
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srsran_cell_t cell = {};
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srsran_cfo_t cfo_h = {};
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srsran_prach_cfg_t cfg = {};
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std::array<std::array<cf_t*, max_preambles>, max_fs> buffer = {};
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cf_t* signal_buffer = nullptr;
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int preamble_idx = -1;
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uint32_t len = 0;
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int allowed_subframe = 0;
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int transmitted_tti = 0;
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float target_power_dbm = 0;
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bool mem_initiated = false;
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bool cell_initiated = false;
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std::bitset<max_fs * max_preambles> buffer_bitmask;
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mutable std::mutex mutex;
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};
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} // namespace srsue
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#endif // SRSUE_PRACH_H
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