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176 lines
6.7 KiB
C
176 lines
6.7 KiB
C
4 years ago
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/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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/******************************************************************************
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* File: pucch.h
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*
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* Description: Physical uplink control channel.
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 5.4
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*****************************************************************************/
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#ifndef SRSRAN_PUCCH_H
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#define SRSRAN_PUCCH_H
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#include "srsran/config.h"
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#include "srsran/phy/ch_estimation/chest_ul.h"
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#include "srsran/phy/common/phy_common.h"
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#include "srsran/phy/common/sequence.h"
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#include "srsran/phy/modem/mod.h"
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#include "srsran/phy/phch/cqi.h"
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#include "srsran/phy/phch/pucch_cfg.h"
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#include "srsran/phy/phch/uci.h"
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#define SRSRAN_PUCCH_N_SEQ SRSRAN_NRE
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#define SRSRAN_PUCCH2_NOF_BITS SRSRAN_UCI_CQI_CODED_PUCCH_B
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#define SRSRAN_PUCCH2_N_SF (5)
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#define SRSRAN_PUCCH_1A_2A_NOF_ACK (1)
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#define SRSRAN_PUCCH_1B_2B_NOF_ACK (2)
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#define SRSRAN_PUCCH3_NOF_BITS (4 * SRSRAN_NRE)
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#define SRSRAN_PUCCH_MAX_SYMBOLS (SRSRAN_PUCCH_N_SEQ * SRSRAN_PUCCH2_N_SF * SRSRAN_NOF_SLOTS_PER_SF)
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// PUCCH Format 1B Channel selection
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#define SRSRAN_PUCCH_CS_MAX_ACK 4
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#define SRSRAN_PUCCH_CS_MAX_CARRIERS 2
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#define SRSRAN_PUCCH_FORMAT3_MAX_CARRIERS 5
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#define SRSRAN_PUCCH_DEFAULT_THRESHOLD_FORMAT1 (0.5f)
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#define SRSRAN_PUCCH_DEFAULT_THRESHOLD_FORMAT1A (0.5f)
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#define SRSRAN_PUCCH_DEFAULT_THRESHOLD_FORMAT2 (0.5f)
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#define SRSRAN_PUCCH_DEFAULT_THRESHOLD_FORMAT3 (0.5f)
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#define SRSRAN_PUCCH_DEFAULT_THRESHOLD_DMRS (0.4f)
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/* PUCCH object */
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typedef struct SRSRAN_API {
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srsran_cell_t cell;
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srsran_modem_table_t mod;
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srsran_uci_cqi_pucch_t cqi;
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srsran_sequence_t seq_f2;
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bool is_ue;
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int16_t llr[SRSRAN_PUCCH3_NOF_BITS];
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uint8_t bits_scram[SRSRAN_PUCCH_MAX_BITS];
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cf_t d[SRSRAN_PUCCH_MAX_BITS / 2];
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uint32_t n_cs_cell[SRSRAN_NSLOTS_X_FRAME][SRSRAN_CP_NORM_NSYMB];
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uint32_t f_gh[SRSRAN_NSLOTS_X_FRAME];
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cf_t* z;
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cf_t* z_tmp;
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cf_t* ce;
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} srsran_pucch_t;
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typedef struct SRSRAN_API {
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srsran_uci_value_t uci_data;
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float dmrs_correlation;
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float snr_db;
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float correlation;
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bool detected;
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// PUCCH Measurements
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bool ta_valid;
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float ta_us;
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} srsran_pucch_res_t;
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SRSRAN_API int srsran_pucch_init_ue(srsran_pucch_t* q);
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SRSRAN_API int srsran_pucch_init_enb(srsran_pucch_t* q);
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SRSRAN_API void srsran_pucch_free(srsran_pucch_t* q);
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/* These functions modify the state of the object and may take some time */
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SRSRAN_API int srsran_pucch_set_cell(srsran_pucch_t* q, srsran_cell_t cell);
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/* These functions do not modify the state and run in real-time */
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SRSRAN_API void srsran_pucch_uci_gen_cfg(srsran_pucch_t* q, srsran_pucch_cfg_t* cfg, srsran_uci_data_t* uci_data);
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SRSRAN_API int srsran_pucch_encode(srsran_pucch_t* q,
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srsran_ul_sf_cfg_t* sf,
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srsran_pucch_cfg_t* cfg,
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srsran_uci_value_t* uci_data,
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cf_t* sf_symbols);
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SRSRAN_API int srsran_pucch_decode(srsran_pucch_t* q,
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srsran_ul_sf_cfg_t* sf,
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srsran_pucch_cfg_t* cfg,
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srsran_chest_ul_res_t* channel,
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cf_t* sf_symbols,
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srsran_pucch_res_t* data);
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/* Other utilities. These functions do not modify the state and run in real-time */
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SRSRAN_API float srsran_pucch_alpha_format1(const uint32_t n_cs_cell[SRSRAN_NSLOTS_X_FRAME][SRSRAN_CP_NORM_NSYMB],
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const srsran_pucch_cfg_t* cfg,
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srsran_cp_t cp,
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bool is_dmrs,
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uint32_t ns,
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uint32_t l,
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uint32_t* n_oc,
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uint32_t* n_prime_ns);
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SRSRAN_API float srsran_pucch_alpha_format2(const uint32_t n_cs_cell[SRSRAN_NSLOTS_X_FRAME][SRSRAN_CP_NORM_NSYMB],
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const srsran_pucch_cfg_t* cfg,
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uint32_t ns,
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uint32_t l);
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SRSRAN_API int srsran_pucch_format2ab_mod_bits(srsran_pucch_format_t format, uint8_t bits[2], cf_t* d_10);
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SRSRAN_API uint32_t srsran_pucch_m(const srsran_pucch_cfg_t* cfg, srsran_cp_t cp);
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SRSRAN_API uint32_t srsran_pucch_n_prb(const srsran_cell_t* cell, const srsran_pucch_cfg_t* cfg, uint32_t ns);
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SRSRAN_API int srsran_pucch_n_cs_cell(srsran_cell_t cell,
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uint32_t n_cs_cell[SRSRAN_NSLOTS_X_FRAME][SRSRAN_CP_NORM_NSYMB]);
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/**
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* Checks PUCCH collision from cell and two PUCCH configurations. The provided configurations shall provide format and
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* n_pucch resource prior to this call.
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*
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* @param cell cell parameters
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* @param cfg1 First PUCCH configuration
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* @param cfg2 Second PUCCH configuration
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* @return SRSRAN_SUCCESS if no collision, SRSRAN_ERROR if collision and otherwise SRSRAN_INVALID_INPUTS
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*/
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SRSRAN_API int
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srsran_pucch_collision(const srsran_cell_t* cell, const srsran_pucch_cfg_t* cfg1, const srsran_pucch_cfg_t* cfg2);
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/**
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* Checks PUCCH format 1b with channel selection collision configuration from a cell.
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*
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* @param cell cell parameters
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* @param cfg PUCCH configuration
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* @return SRSRAN_SUCCESS if no collision, SRSRAN_ERROR if collision and otherwise SRSRAN_INVALID_INPUTS
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*/
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SRSRAN_API int srsran_pucch_cfg_assert(const srsran_cell_t* cell, const srsran_pucch_cfg_t* cfg);
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SRSRAN_API char* srsran_pucch_format_text(srsran_pucch_format_t format);
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SRSRAN_API char* srsran_pucch_format_text_short(srsran_pucch_format_t format);
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/**
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* Returns the number of ACK bits supported by a given PUCCH format
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* @param format PUCCH format
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* @return Returns the number of bits supported by the format
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*/
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SRSRAN_API uint32_t srsran_pucch_nof_ack_format(srsran_pucch_format_t format);
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SRSRAN_API void
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srsran_pucch_tx_info(srsran_pucch_cfg_t* cfg, srsran_uci_value_t* uci_data, char* str, uint32_t str_len);
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SRSRAN_API void
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srsran_pucch_rx_info(srsran_pucch_cfg_t* cfg, srsran_pucch_res_t* pucch_res, char* str, uint32_t str_len);
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SRSRAN_API bool srsran_pucch_cfg_isvalid(srsran_pucch_cfg_t* cfg, uint32_t nof_prb);
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#endif // SRSRAN_PUCCH_H
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