/** * Copyright 2013-2021 Software Radio Systems Limited * * This file is part of srsLTE. * * srsLTE is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * srsLTE is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * A copy of the GNU Affero General Public License can be found in * the LICENSE file in the top-level directory of this distribution * and at http://www.gnu.org/licenses/. * */ #ifndef SRSLTE_UE_DL_NBIOT_H #define SRSLTE_UE_DL_NBIOT_H #include #include "srslte/phy/ch_estimation/chest_dl_nbiot.h" #include "srslte/phy/common/phy_common.h" #include "srslte/phy/dft/ofdm.h" #include "srslte/phy/phch/dci_nbiot.h" #include "srslte/phy/phch/npdcch.h" #include "srslte/phy/phch/npdsch.h" #include "srslte/phy/phch/npdsch_cfg.h" #include "srslte/phy/phch/ra_nbiot.h" #include "srslte/phy/sync/cfo.h" #include "srslte/phy/utils/debug.h" #include "srslte/phy/utils/vector.h" #include "srslte/config.h" #define SRSLTE_NBIOT_EXPECT_MORE_SF -3 // returned when expecting more subframes for successful decoding #define SRSLTE_NBIOT_UE_DL_FOUND_DCI -4 // returned when DCI for given RNTI was found #define SRSLTE_NBIOT_UE_DL_SKIP_SF -5 /* * @brief Narrowband UE downlink object. * * This module is a frontend to all the downlink data and control * channel processing modules. */ typedef struct SRSLTE_API { srslte_npdcch_t npdcch; srslte_npdsch_t npdsch; srslte_ofdm_t fft; srslte_chest_dl_nbiot_t chest; srslte_cfo_t sfo_correct; srslte_softbuffer_rx_t softbuffer; srslte_nbiot_cell_t cell; srslte_mib_nb_t mib; bool mib_set; int nof_re; // Number of RE per subframe cf_t* sf_symbols; // this buffer holds the symbols of the current subframe cf_t* sf_buffer; // this buffer holds multiple subframes cf_t* ce[SRSLTE_MAX_PORTS]; cf_t* ce_buffer[SRSLTE_MAX_PORTS]; float* llr; // Buffer to hold soft-bits for later combining repetitions uint32_t pkt_errors; uint32_t pkts_total; uint32_t pkts_ok; uint32_t nof_detected; uint32_t bits_total; // DL configuration for "normal" transmissions bool has_dl_grant; srslte_npdsch_cfg_t npdsch_cfg; // DL configuration for SIB1 transmissions uint32_t sib1_sfn[4 * SIB1_NB_MAX_REP]; // there are 4 SIB1 TTIs in each hyper frame srslte_nbiot_si_params_t si_params[SRSLTE_NBIOT_SI_TYPE_NITEMS]; bool si_tti[10240]; // We trade memory consumption for speed uint16_t current_rnti; uint32_t last_n_cce; srslte_dci_location_t last_location; float sample_offset; } srslte_nbiot_ue_dl_t; // This function shall be called just after the initial synchronization SRSLTE_API int srslte_nbiot_ue_dl_init(srslte_nbiot_ue_dl_t* q, cf_t* in_buffer[SRSLTE_MAX_PORTS], uint32_t max_prb, uint32_t nof_rx_antennas); SRSLTE_API void srslte_nbiot_ue_dl_free(srslte_nbiot_ue_dl_t* q); SRSLTE_API int srslte_nbiot_ue_dl_set_cell(srslte_nbiot_ue_dl_t* q, srslte_nbiot_cell_t cell); SRSLTE_API int srslte_nbiot_ue_dl_decode_fft_estimate(srslte_nbiot_ue_dl_t* q, uint32_t sf_idx, bool is_dl_sf); SRSLTE_API int srslte_nbiot_ue_dl_decode_estimate(srslte_nbiot_ue_dl_t* q, uint32_t sf_idx); SRSLTE_API int srslte_nbiot_ue_dl_cfg_grant(srslte_nbiot_ue_dl_t* q, srslte_ra_nbiot_dl_grant_t* grant, uint32_t sf_idx); SRSLTE_API int 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); 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); int srslte_nbiot_ue_dl_find_dl_dci_type_crnti(srslte_nbiot_ue_dl_t* q, uint32_t sf_idx, uint16_t rnti, srslte_dci_msg_t* dci_msg); SRSLTE_API int 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); SRSLTE_API uint32_t srslte_nbiot_ue_dl_get_ncce(srslte_nbiot_ue_dl_t* q); SRSLTE_API void srslte_nbiot_ue_dl_set_sample_offset(srslte_nbiot_ue_dl_t* q, float sample_offset); SRSLTE_API int srslte_nbiot_ue_dl_decode(srslte_nbiot_ue_dl_t* q, cf_t* input, uint8_t* data, uint32_t sfn, uint32_t sf_idx); SRSLTE_API int srslte_nbiot_ue_dl_decode_npdcch(srslte_nbiot_ue_dl_t* q, cf_t* input, uint32_t sfn, uint32_t sf_idx, uint16_t rnti, srslte_dci_msg_t* dci_msg); SRSLTE_API int srslte_nbiot_ue_dl_decode_npdsch(srslte_nbiot_ue_dl_t* q, cf_t* input, uint8_t* data, uint32_t sfn, uint32_t sf_idx, uint16_t rnti); int srslte_nbiot_ue_dl_decode_npdsch_bcch(srslte_nbiot_ue_dl_t* q, uint8_t* data, uint32_t tti); int srslte_nbiot_ue_dl_decode_npdsch_no_bcch(srslte_nbiot_ue_dl_t* q, uint8_t* data, uint32_t tti, uint16_t rnti); void srslte_nbiot_ue_dl_tb_decoded(srslte_nbiot_ue_dl_t* q, uint8_t* data); SRSLTE_API void srslte_nbiot_ue_dl_reset(srslte_nbiot_ue_dl_t* q); SRSLTE_API void srslte_nbiot_ue_dl_set_rnti(srslte_nbiot_ue_dl_t* q, uint16_t rnti); SRSLTE_API void srslte_nbiot_ue_dl_set_mib(srslte_nbiot_ue_dl_t* q, srslte_mib_nb_t mib); SRSLTE_API void srslte_nbiot_ue_dl_decode_sib1(srslte_nbiot_ue_dl_t* q, uint32_t current_sfn); SRSLTE_API void srslte_nbiot_ue_dl_get_sib1_grant(srslte_nbiot_ue_dl_t* q, uint32_t sfn, srslte_ra_nbiot_dl_grant_t* grant); SRSLTE_API void srslte_nbiot_ue_dl_decode_sib(srslte_nbiot_ue_dl_t* q, uint32_t hfn, uint32_t sfn, srslte_nbiot_si_type_t type, srslte_nbiot_si_params_t params); SRSLTE_API void srslte_nbiot_ue_dl_get_next_si_sfn(uint32_t current_hfn, uint32_t current_sfn, srslte_nbiot_si_params_t params, uint32_t* si_hfn, uint32_t* si_sfn); SRSLTE_API void 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); SRSLTE_API bool srslte_nbiot_ue_dl_is_sib1_sf(srslte_nbiot_ue_dl_t* q, uint32_t sfn, uint32_t sf_idx); SRSLTE_API void srslte_nbiot_ue_dl_set_grant(srslte_nbiot_ue_dl_t* q, srslte_ra_nbiot_dl_grant_t* grant); SRSLTE_API void srslte_nbiot_ue_dl_flush_grant(srslte_nbiot_ue_dl_t* q); SRSLTE_API bool srslte_nbiot_ue_dl_has_grant(srslte_nbiot_ue_dl_t* q); SRSLTE_API void srslte_nbiot_ue_dl_check_grant(srslte_nbiot_ue_dl_t* q, srslte_ra_nbiot_dl_grant_t* grant); 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); #endif // SRSLTE_UE_DL_NBIOT_H