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192 lines
8.0 KiB
C
192 lines
8.0 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 SRSRAN_UE_DL_NBIOT_H
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#define SRSRAN_UE_DL_NBIOT_H
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#include <stdbool.h>
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#include "srsran/phy/ch_estimation/chest_dl_nbiot.h"
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#include "srsran/phy/common/phy_common.h"
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#include "srsran/phy/dft/ofdm.h"
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#include "srsran/phy/phch/dci_nbiot.h"
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#include "srsran/phy/phch/npdcch.h"
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#include "srsran/phy/phch/npdsch.h"
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#include "srsran/phy/phch/npdsch_cfg.h"
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#include "srsran/phy/phch/ra_nbiot.h"
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#include "srsran/phy/sync/cfo.h"
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#include "srsran/phy/utils/debug.h"
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#include "srsran/phy/utils/vector.h"
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#include "srsran/config.h"
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#define SRSRAN_NBIOT_EXPECT_MORE_SF -3 // returned when expecting more subframes for successful decoding
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#define SRSRAN_NBIOT_UE_DL_FOUND_DCI -4 // returned when DCI for given RNTI was found
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#define SRSRAN_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 SRSRAN_API {
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srsran_npdcch_t npdcch;
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srsran_npdsch_t npdsch;
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srsran_ofdm_t fft;
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srsran_chest_dl_nbiot_t chest;
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srsran_cfo_t sfo_correct;
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srsran_softbuffer_rx_t softbuffer;
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srsran_nbiot_cell_t cell;
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srsran_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[SRSRAN_MAX_PORTS];
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cf_t* ce_buffer[SRSRAN_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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srsran_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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srsran_nbiot_si_params_t si_params[SRSRAN_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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srsran_dci_location_t last_location;
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float sample_offset;
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} srsran_nbiot_ue_dl_t;
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// This function shall be called just after the initial synchronization
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SRSRAN_API int srsran_nbiot_ue_dl_init(srsran_nbiot_ue_dl_t* q,
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cf_t* in_buffer[SRSRAN_MAX_PORTS],
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uint32_t max_prb,
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uint32_t nof_rx_antennas);
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SRSRAN_API void srsran_nbiot_ue_dl_free(srsran_nbiot_ue_dl_t* q);
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SRSRAN_API int srsran_nbiot_ue_dl_set_cell(srsran_nbiot_ue_dl_t* q, srsran_nbiot_cell_t cell);
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SRSRAN_API int srsran_nbiot_ue_dl_decode_fft_estimate(srsran_nbiot_ue_dl_t* q, uint32_t sf_idx, bool is_dl_sf);
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SRSRAN_API int srsran_nbiot_ue_dl_decode_estimate(srsran_nbiot_ue_dl_t* q, uint32_t sf_idx);
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SRSRAN_API int
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srsran_nbiot_ue_dl_cfg_grant(srsran_nbiot_ue_dl_t* q, srsran_ra_nbiot_dl_grant_t* grant, uint32_t sf_idx);
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SRSRAN_API int
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srsran_nbiot_ue_dl_find_dl_dci(srsran_nbiot_ue_dl_t* q, uint32_t sf_idx, uint16_t rnti, srsran_dci_msg_t* dci_msg);
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int srsran_nbiot_ue_dl_find_dl_dci_type_siprarnti(srsran_nbiot_ue_dl_t* q, uint16_t rnti, srsran_dci_msg_t* dci_msg);
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int srsran_nbiot_ue_dl_find_dl_dci_type_crnti(srsran_nbiot_ue_dl_t* q,
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uint32_t sf_idx,
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uint16_t rnti,
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srsran_dci_msg_t* dci_msg);
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SRSRAN_API int
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srsran_nbiot_ue_dl_find_ul_dci(srsran_nbiot_ue_dl_t* q, uint32_t tti, uint32_t rnti, srsran_dci_msg_t* dci_msg);
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SRSRAN_API uint32_t srsran_nbiot_ue_dl_get_ncce(srsran_nbiot_ue_dl_t* q);
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SRSRAN_API void srsran_nbiot_ue_dl_set_sample_offset(srsran_nbiot_ue_dl_t* q, float sample_offset);
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SRSRAN_API int
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srsran_nbiot_ue_dl_decode(srsran_nbiot_ue_dl_t* q, cf_t* input, uint8_t* data, uint32_t sfn, uint32_t sf_idx);
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SRSRAN_API int srsran_nbiot_ue_dl_decode_npdcch(srsran_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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srsran_dci_msg_t* dci_msg);
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SRSRAN_API int srsran_nbiot_ue_dl_decode_npdsch(srsran_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 srsran_nbiot_ue_dl_decode_npdsch_bcch(srsran_nbiot_ue_dl_t* q, uint8_t* data, uint32_t tti);
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int srsran_nbiot_ue_dl_decode_npdsch_no_bcch(srsran_nbiot_ue_dl_t* q, uint8_t* data, uint32_t tti, uint16_t rnti);
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void srsran_nbiot_ue_dl_tb_decoded(srsran_nbiot_ue_dl_t* q, uint8_t* data);
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SRSRAN_API void srsran_nbiot_ue_dl_reset(srsran_nbiot_ue_dl_t* q);
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SRSRAN_API void srsran_nbiot_ue_dl_set_rnti(srsran_nbiot_ue_dl_t* q, uint16_t rnti);
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SRSRAN_API void srsran_nbiot_ue_dl_set_mib(srsran_nbiot_ue_dl_t* q, srsran_mib_nb_t mib);
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SRSRAN_API void srsran_nbiot_ue_dl_decode_sib1(srsran_nbiot_ue_dl_t* q, uint32_t current_sfn);
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SRSRAN_API void
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srsran_nbiot_ue_dl_get_sib1_grant(srsran_nbiot_ue_dl_t* q, uint32_t sfn, srsran_ra_nbiot_dl_grant_t* grant);
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SRSRAN_API void srsran_nbiot_ue_dl_decode_sib(srsran_nbiot_ue_dl_t* q,
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uint32_t hfn,
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uint32_t sfn,
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srsran_nbiot_si_type_t type,
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srsran_nbiot_si_params_t params);
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SRSRAN_API void srsran_nbiot_ue_dl_get_next_si_sfn(uint32_t current_hfn,
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uint32_t current_sfn,
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srsran_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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SRSRAN_API void
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srsran_nbiot_ue_dl_set_si_params(srsran_nbiot_ue_dl_t* q, srsran_nbiot_si_type_t type, srsran_nbiot_si_params_t params);
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SRSRAN_API bool srsran_nbiot_ue_dl_is_sib1_sf(srsran_nbiot_ue_dl_t* q, uint32_t sfn, uint32_t sf_idx);
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SRSRAN_API void srsran_nbiot_ue_dl_set_grant(srsran_nbiot_ue_dl_t* q, srsran_ra_nbiot_dl_grant_t* grant);
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SRSRAN_API void srsran_nbiot_ue_dl_flush_grant(srsran_nbiot_ue_dl_t* q);
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SRSRAN_API bool srsran_nbiot_ue_dl_has_grant(srsran_nbiot_ue_dl_t* q);
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SRSRAN_API void srsran_nbiot_ue_dl_check_grant(srsran_nbiot_ue_dl_t* q, srsran_ra_nbiot_dl_grant_t* grant);
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SRSRAN_API void srsran_nbiot_ue_dl_save_signal(srsran_nbiot_ue_dl_t* q, cf_t* input, uint32_t tti, uint32_t sf_idx);
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#endif // SRSRAN_UE_DL_NBIOT_H
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