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/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE 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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* srsLTE 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 SRSLTE_UE_DL_NBIOT_H
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#define SRSLTE_UE_DL_NBIOT_H
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#include <stdbool.h>
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#include "srslte/phy/ch_estimation/chest_dl_nbiot.h"
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/dft/ofdm.h"
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#include "srslte/phy/phch/dci_nbiot.h"
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#include "srslte/phy/phch/npdcch.h"
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#include "srslte/phy/phch/npdsch.h"
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#include "srslte/phy/phch/npdsch_cfg.h"
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#include "srslte/phy/phch/ra_nbiot.h"
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#include "srslte/phy/sync/cfo.h"
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#include "srslte/phy/utils/debug.h"
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#include "srslte/phy/utils/vector.h"
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#include "srslte/config.h"
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#define SRSLTE_NBIOT_EXPECT_MORE_SF -3 // returned when expecting more subframes for successful decoding
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#define SRSLTE_NBIOT_UE_DL_FOUND_DCI -4 // returned when DCI for given RNTI was found
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#define SRSLTE_NBIOT_UE_DL_SKIP_SF -5
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/*
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* @brief Narrowband UE downlink object.
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*
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* This module is a frontend to all the downlink data and control
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* channel processing modules.
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*/
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typedef struct SRSLTE_API {
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srslte_npdcch_t npdcch;
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srslte_npdsch_t npdsch;
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srslte_ofdm_t fft;
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srslte_chest_dl_nbiot_t chest;
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srslte_cfo_t sfo_correct;
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srslte_softbuffer_rx_t softbuffer;
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srslte_nbiot_cell_t cell;
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srslte_mib_nb_t mib;
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bool mib_set;
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int nof_re; // Number of RE per subframe
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cf_t* sf_symbols; // this buffer holds the symbols of the current subframe
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cf_t* sf_buffer; // this buffer holds multiple subframes
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cf_t* ce[SRSLTE_MAX_PORTS];
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cf_t* ce_buffer[SRSLTE_MAX_PORTS];
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float* llr; // Buffer to hold soft-bits for later combining repetitions
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uint32_t pkt_errors;
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uint32_t pkts_total;
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uint32_t pkts_ok;
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uint32_t nof_detected;
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uint32_t bits_total;
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// DL configuration for "normal" transmissions
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bool has_dl_grant;
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srslte_npdsch_cfg_t npdsch_cfg;
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// DL configuration for SIB1 transmissions
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uint32_t sib1_sfn[4 * SIB1_NB_MAX_REP]; // there are 4 SIB1 TTIs in each hyper frame
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srslte_nbiot_si_params_t si_params[SRSLTE_NBIOT_SI_TYPE_NITEMS];
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bool si_tti[10240]; // We trade memory consumption for speed
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uint16_t current_rnti;
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uint32_t last_n_cce;
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srslte_dci_location_t last_location;
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float sample_offset;
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} srslte_nbiot_ue_dl_t;
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// This function shall be called just after the initial synchronization
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SRSLTE_API int srslte_nbiot_ue_dl_init(srslte_nbiot_ue_dl_t* q,
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cf_t* in_buffer[SRSLTE_MAX_PORTS],
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uint32_t max_prb,
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uint32_t nof_rx_antennas);
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SRSLTE_API void srslte_nbiot_ue_dl_free(srslte_nbiot_ue_dl_t* q);
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SRSLTE_API int srslte_nbiot_ue_dl_set_cell(srslte_nbiot_ue_dl_t* q, srslte_nbiot_cell_t cell);
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SRSLTE_API int srslte_nbiot_ue_dl_decode_fft_estimate(srslte_nbiot_ue_dl_t* q, uint32_t sf_idx, bool is_dl_sf);
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SRSLTE_API int srslte_nbiot_ue_dl_decode_estimate(srslte_nbiot_ue_dl_t* q, uint32_t sf_idx);
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SRSLTE_API int
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srslte_nbiot_ue_dl_cfg_grant(srslte_nbiot_ue_dl_t* q, srslte_ra_nbiot_dl_grant_t* grant, uint32_t sf_idx);
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SRSLTE_API int
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srslte_nbiot_ue_dl_find_dl_dci(srslte_nbiot_ue_dl_t* q, uint32_t sf_idx, uint16_t rnti, srslte_dci_msg_t* dci_msg);
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int srslte_nbiot_ue_dl_find_dl_dci_type_siprarnti(srslte_nbiot_ue_dl_t* q, uint16_t rnti, srslte_dci_msg_t* dci_msg);
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int srslte_nbiot_ue_dl_find_dl_dci_type_crnti(srslte_nbiot_ue_dl_t* q,
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uint32_t sf_idx,
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uint16_t rnti,
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srslte_dci_msg_t* dci_msg);
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SRSLTE_API int
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srslte_nbiot_ue_dl_find_ul_dci(srslte_nbiot_ue_dl_t* q, uint32_t tti, uint32_t rnti, srslte_dci_msg_t* dci_msg);
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SRSLTE_API uint32_t srslte_nbiot_ue_dl_get_ncce(srslte_nbiot_ue_dl_t* q);
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SRSLTE_API void srslte_nbiot_ue_dl_set_sample_offset(srslte_nbiot_ue_dl_t* q, float sample_offset);
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SRSLTE_API int
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srslte_nbiot_ue_dl_decode(srslte_nbiot_ue_dl_t* q, cf_t* input, uint8_t* data, uint32_t sfn, uint32_t sf_idx);
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SRSLTE_API int srslte_nbiot_ue_dl_decode_npdcch(srslte_nbiot_ue_dl_t* q,
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cf_t* input,
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uint32_t sfn,
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uint32_t sf_idx,
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uint16_t rnti,
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srslte_dci_msg_t* dci_msg);
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SRSLTE_API int srslte_nbiot_ue_dl_decode_npdsch(srslte_nbiot_ue_dl_t* q,
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cf_t* input,
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uint8_t* data,
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uint32_t sfn,
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uint32_t sf_idx,
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uint16_t rnti);
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int srslte_nbiot_ue_dl_decode_npdsch_bcch(srslte_nbiot_ue_dl_t* q, uint8_t* data, uint32_t tti);
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int srslte_nbiot_ue_dl_decode_npdsch_no_bcch(srslte_nbiot_ue_dl_t* q, uint8_t* data, uint32_t tti, uint16_t rnti);
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void srslte_nbiot_ue_dl_tb_decoded(srslte_nbiot_ue_dl_t* q, uint8_t* data);
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SRSLTE_API void srslte_nbiot_ue_dl_reset(srslte_nbiot_ue_dl_t* q);
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SRSLTE_API void srslte_nbiot_ue_dl_set_rnti(srslte_nbiot_ue_dl_t* q, uint16_t rnti);
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SRSLTE_API void srslte_nbiot_ue_dl_set_mib(srslte_nbiot_ue_dl_t* q, srslte_mib_nb_t mib);
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SRSLTE_API void srslte_nbiot_ue_dl_decode_sib1(srslte_nbiot_ue_dl_t* q, uint32_t current_sfn);
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SRSLTE_API void
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srslte_nbiot_ue_dl_get_sib1_grant(srslte_nbiot_ue_dl_t* q, uint32_t sfn, srslte_ra_nbiot_dl_grant_t* grant);
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SRSLTE_API void srslte_nbiot_ue_dl_decode_sib(srslte_nbiot_ue_dl_t* q,
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uint32_t hfn,
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uint32_t sfn,
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srslte_nbiot_si_type_t type,
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srslte_nbiot_si_params_t params);
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SRSLTE_API void srslte_nbiot_ue_dl_get_next_si_sfn(uint32_t current_hfn,
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uint32_t current_sfn,
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srslte_nbiot_si_params_t params,
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uint32_t* si_hfn,
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uint32_t* si_sfn);
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SRSLTE_API void
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srslte_nbiot_ue_dl_set_si_params(srslte_nbiot_ue_dl_t* q, srslte_nbiot_si_type_t type, srslte_nbiot_si_params_t params);
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SRSLTE_API bool srslte_nbiot_ue_dl_is_sib1_sf(srslte_nbiot_ue_dl_t* q, uint32_t sfn, uint32_t sf_idx);
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SRSLTE_API void srslte_nbiot_ue_dl_set_grant(srslte_nbiot_ue_dl_t* q, srslte_ra_nbiot_dl_grant_t* grant);
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SRSLTE_API void srslte_nbiot_ue_dl_flush_grant(srslte_nbiot_ue_dl_t* q);
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SRSLTE_API bool srslte_nbiot_ue_dl_has_grant(srslte_nbiot_ue_dl_t* q);
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SRSLTE_API void srslte_nbiot_ue_dl_check_grant(srslte_nbiot_ue_dl_t* q, srslte_ra_nbiot_dl_grant_t* grant);
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SRSLTE_API void srslte_nbiot_ue_dl_save_signal(srslte_nbiot_ue_dl_t* q, cf_t* input, uint32_t tti, uint32_t sf_idx);
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#endif // SRSLTE_UE_DL_NBIOT_H
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