/* * Copyright 2013-2020 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/. * */ /****************************************************************************** * File: pucch.h * * Description: Physical uplink control channel. * * Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 5.4 *****************************************************************************/ #ifndef SRSLTE_PUCCH_H #define SRSLTE_PUCCH_H #include "srslte/config.h" #include "srslte/phy/ch_estimation/chest_ul.h" #include "srslte/phy/common/phy_common.h" #include "srslte/phy/common/sequence.h" #include "srslte/phy/modem/mod.h" #include "srslte/phy/phch/cqi.h" #include "srslte/phy/phch/pucch_cfg.h" #include "srslte/phy/phch/uci.h" #define SRSLTE_PUCCH_N_SEQ SRSLTE_NRE #define SRSLTE_PUCCH2_NOF_BITS SRSLTE_UCI_CQI_CODED_PUCCH_B #define SRSLTE_PUCCH2_N_SF (5) #define SRSLTE_PUCCH_1A_2A_NOF_ACK (1) #define SRSLTE_PUCCH_1B_2B_NOF_ACK (2) #define SRSLTE_PUCCH3_NOF_BITS (4 * SRSLTE_NRE) #define SRSLTE_PUCCH_MAX_SYMBOLS (SRSLTE_PUCCH_N_SEQ * SRSLTE_PUCCH2_N_SF * SRSLTE_NOF_SLOTS_PER_SF) // PUCCH Format 1B Channel selection #define SRSLTE_PUCCH_CS_MAX_ACK 4 #define SRSLTE_PUCCH_CS_MAX_CARRIERS 2 #define SRSLTE_PUCCH_FORMAT3_MAX_CARRIERS 5 #define SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT1 (0.5f) #define SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT1A (0.5f) #define SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT2 (0.5f) #define SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT3 (0.5f) #define SRSLTE_PUCCH_DEFAULT_THRESHOLD_DMRS (0.4f) typedef struct { srslte_sequence_t seq_f2[SRSLTE_NOF_SF_X_FRAME]; uint32_t cell_id; bool sequence_generated; } srslte_pucch_user_t; /* PUCCH object */ typedef struct SRSLTE_API { srslte_cell_t cell; srslte_modem_table_t mod; srslte_uci_cqi_pucch_t cqi; srslte_pucch_user_t** users; srslte_sequence_t tmp_seq; uint16_t ue_rnti; bool is_ue; int16_t llr[SRSLTE_PUCCH3_NOF_BITS]; uint8_t bits_scram[SRSLTE_PUCCH_MAX_BITS]; cf_t d[SRSLTE_PUCCH_MAX_BITS / 2]; uint32_t n_cs_cell[SRSLTE_NSLOTS_X_FRAME][SRSLTE_CP_NORM_NSYMB]; uint32_t f_gh[SRSLTE_NSLOTS_X_FRAME]; float tmp_arg[SRSLTE_PUCCH_N_SEQ]; cf_t* z; cf_t* z_tmp; cf_t* ce; } srslte_pucch_t; typedef struct SRSLTE_API { srslte_uci_value_t uci_data; float dmrs_correlation; float correlation; bool detected; // PUCCH Measurements bool ta_valid; float ta_us; } srslte_pucch_res_t; SRSLTE_API int srslte_pucch_init_ue(srslte_pucch_t* q); SRSLTE_API int srslte_pucch_init_enb(srslte_pucch_t* q); SRSLTE_API void srslte_pucch_free(srslte_pucch_t* q); /* These functions modify the state of the object and may take some time */ SRSLTE_API int srslte_pucch_set_cell(srslte_pucch_t* q, srslte_cell_t cell); SRSLTE_API int srslte_pucch_set_rnti(srslte_pucch_t* q, uint16_t rnti); SRSLTE_API void srslte_pucch_free_rnti(srslte_pucch_t* q, uint16_t rnti); /* These functions do not modify the state and run in real-time */ SRSLTE_API void srslte_pucch_uci_gen_cfg(srslte_pucch_t* q, srslte_pucch_cfg_t* cfg, srslte_uci_data_t* uci_data); SRSLTE_API int srslte_pucch_encode(srslte_pucch_t* q, srslte_ul_sf_cfg_t* sf, srslte_pucch_cfg_t* cfg, srslte_uci_value_t* uci_data, cf_t* sf_symbols); SRSLTE_API int srslte_pucch_decode(srslte_pucch_t* q, srslte_ul_sf_cfg_t* sf, srslte_pucch_cfg_t* cfg, srslte_chest_ul_res_t* channel, cf_t* sf_symbols, srslte_pucch_res_t* data); /* Other utilities. These functions do not modify the state and run in real-time */ SRSLTE_API float srslte_pucch_alpha_format1(const uint32_t n_cs_cell[SRSLTE_NSLOTS_X_FRAME][SRSLTE_CP_NORM_NSYMB], const srslte_pucch_cfg_t* cfg, srslte_cp_t cp, bool is_dmrs, uint32_t ns, uint32_t l, uint32_t* n_oc, uint32_t* n_prime_ns); SRSLTE_API float srslte_pucch_alpha_format2(const uint32_t n_cs_cell[SRSLTE_NSLOTS_X_FRAME][SRSLTE_CP_NORM_NSYMB], const srslte_pucch_cfg_t* cfg, uint32_t ns, uint32_t l); SRSLTE_API int srslte_pucch_format2ab_mod_bits(srslte_pucch_format_t format, uint8_t bits[2], cf_t* d_10); SRSLTE_API uint32_t srslte_pucch_m(const srslte_pucch_cfg_t* cfg, srslte_cp_t cp); SRSLTE_API uint32_t srslte_pucch_n_prb(srslte_cell_t* cell, srslte_pucch_cfg_t* cfg, uint32_t ns); SRSLTE_API int srslte_pucch_n_cs_cell(srslte_cell_t cell, uint32_t n_cs_cell[SRSLTE_NSLOTS_X_FRAME][SRSLTE_CP_NORM_NSYMB]); /** * Checks PUCCH collision from cell and two PUCCH configurations. The provided configurations shall provide format and * n_pucch resource prior to this call. * * @param cell cell parameters * @param cfg1 First PUCCH configuration * @param cfg2 Second PUCCH configuration * @return SRSLTE_SUCCESS if no collision, SRSLTE_ERROR if collision and otherwise SRSLTE_INVALID_INPUTS */ SRSLTE_API int srslte_pucch_collision(const srslte_cell_t* cell, const srslte_pucch_cfg_t* cfg1, const srslte_pucch_cfg_t* cfg2); /** * Checks PUCCH format 1b with channel selection collision configuration from a cell. * * @param cell cell parameters * @param cfg PUCCH configuration * @return SRSLTE_SUCCESS if no collision, SRSLTE_ERROR if collision and otherwise SRSLTE_INVALID_INPUTS */ SRSLTE_API int srslte_pucch_cfg_assert(const srslte_cell_t* cell, const srslte_pucch_cfg_t* cfg); SRSLTE_API char* srslte_pucch_format_text(srslte_pucch_format_t format); SRSLTE_API char* srslte_pucch_format_text_short(srslte_pucch_format_t format); /** * Returns the number of ACK bits supported by a given PUCCH format * @param format PUCCH format * @return Returns the number of bits supported by the format */ SRSLTE_API uint32_t srslte_pucch_nof_ack_format(srslte_pucch_format_t format); SRSLTE_API void srslte_pucch_tx_info(srslte_pucch_cfg_t* cfg, srslte_uci_value_t* uci_data, char* str, uint32_t str_len); SRSLTE_API void srslte_pucch_rx_info(srslte_pucch_cfg_t* cfg, srslte_pucch_res_t* pucch_res, char* str, uint32_t str_len); SRSLTE_API bool srslte_pucch_cfg_isvalid(srslte_pucch_cfg_t* cfg, uint32_t nof_prb); #endif // SRSLTE_PUCCH_H