mirror of https://github.com/PentHertz/srsLTE.git
104 lines
4.4 KiB
C
104 lines
4.4 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2020 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: ra_nr.h
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*
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* Description: Implements Resource allocation Procedures common in for DL and UL
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*
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* Reference: 3GPP TS 38.214 version 15.10.0
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*****************************************************************************/
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#ifndef SRSLTE_RA_NR_H
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#define SRSLTE_RA_NR_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "srslte/config.h"
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#include "srslte/phy/common/phy_common_nr.h"
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#include "srslte/phy/phch/dci_nr.h"
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#include "srslte/phy/phch/phch_cfg_nr.h"
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/**
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* @brief Determines target rate
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* @param mcs_table Configured MCS table
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* @param dci_format DCI format used for the grant
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* @param search_space_type Search space type
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* @param rnti_type RNTI type
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* @param mcs_idx Desired Modulation Coding Scheme (MCS) index
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* @return The target rate if provided information is valid. Otherwise, it returns NAN
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*/
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SRSLTE_API double srslte_ra_nr_R_from_mcs(srslte_mcs_table_t mcs_table,
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srslte_dci_format_nr_t dci_format,
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srslte_search_space_type_t search_space_type,
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srslte_rnti_type_t rnti_type,
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uint32_t mcs_idx);
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/**
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* @brief Determines target rate
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* @param mcs_table Configured MCS table
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* @param dci_format DCI format used for the grant
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* @param search_space_type Search space type
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* @param rnti_type RNTI type
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* @param mcs_idx Desired Modulation Coding Scheme (MCS) index
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* @return The selected modulation if provided information is valid. Otherwise, it returns SRSLTE_MOD_NITEMS
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*/
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SRSLTE_API srslte_mod_t srslte_ra_nr_mod_from_mcs(srslte_mcs_table_t mcs_table,
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srslte_dci_format_nr_t dci_format,
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srslte_search_space_type_t search_space_type,
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srslte_rnti_type_t rnti_type,
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uint32_t mcs_idx);
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/**
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* @brief Determines the number of resource elements available for a given PDSCH transmission
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* @param pdsch_cfg PDSCH configuration provided by higher layers
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* @param grant The given PDSCH transmission grant
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* @return The number of resource elements if the provided configuration is valid, otherwise SRSLTE_ERROR code
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*/
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SRSLTE_API int srslte_ra_dl_nr_slot_nof_re(const srslte_sch_cfg_nr_t* pdsch_cfg, const srslte_sch_grant_nr_t* grant);
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/**
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* @brief Calculates shared channel TBS
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* @param N_re Number of resource elements
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* @param S TB scaling, used in rare occasions. Set to 1, 0, NAN or INF if unused.
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* @param R Target Rate
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* @param Qm Modulation level
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* @param nof_layers Number of layers
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* @return The transport block size
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*/
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SRSLTE_API uint32_t srslte_ra_nr_tbs(uint32_t N_re, double S, double R, uint32_t Qm, uint32_t nof_layers);
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SRSLTE_API int srslte_ra_nr_fill_tb(const srslte_sch_cfg_nr_t* pdsch_cfg,
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const srslte_sch_grant_nr_t* grant,
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uint32_t mcs_idx,
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srslte_sch_tb_t* tb);
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/**
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* @brief Converts an unpacked DL DCI message to a PDSCH grant structure.
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* Implements the procedures defined in Section 5 of 38.214 to compute the resource allocation (5.1.2)
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* and modulation order, target rate, redundancy version and TBS (5.1.3)
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*
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* Note: Only TypeA PDSCH mapping type is supported
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*
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* @param carrier Carrier information struct
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* @param pdsch_cfg PDSCH configuration indicated by higher layers
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* @param dci_dl DCI downlink (format 1_0 or 1_1)
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* @param pdsch_grant Generated PDSCH grant
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* @return 0 on success, -1 on error
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*/
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SRSLTE_API int srslte_ra_dl_dci_to_grant_nr(const srslte_carrier_nr_t* carrier,
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const srslte_sch_cfg_nr_t* pdsch_cfg,
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const srslte_dci_dl_nr_t* dci_dl,
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srslte_sch_grant_nr_t* pdsch_grant);
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#endif // SRSLTE_RA_NR_H
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