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117 lines
5.2 KiB
C
117 lines
5.2 KiB
C
/**
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* Copyright 2013-2022 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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/******************************************************************************
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* @file ue_dl_nr.h
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*
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* Description: NR UE downlink physical layer procedures for data
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*
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* This module is a frontend to all the downlink data channel processing modules.
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*
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* Reference:
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*****************************************************************************/
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#ifndef SRSRAN_RA_DL_NR_H
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#define SRSRAN_RA_DL_NR_H
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#include "srsran/phy/common/phy_common_nr.h"
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#include "srsran/phy/phch/dci_nr.h"
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#include "srsran/phy/phch/phch_cfg_nr.h"
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/**
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* @brief Calculates the PDSCH time resource allocation and stores it in the provided PDSCH NR grant.
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*
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* @remark Defined by TS 38.214 V15.10.0 section 5.1.2.1.1 Determination of the resource allocation table to be used for
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* PDSCH
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*
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* @param cfg Flattened PDSCH configuration provided from higher layers
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* @param rnti_type Type of the RNTI of the corresponding DCI
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* @param ss_type Type of the SS for PDCCH
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* @param coreset_id CORESET identifier associated with the PDCCH transmission
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* @param m Time domain resource assignment field value m provided in DCI
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* @param[out] Provides grant pointer to fill
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* @return Returns SRSRAN_SUCCESS if the provided allocation is valid, otherwise it returns SRSRAN_ERROR code
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*/
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SRSRAN_API int srsran_ra_dl_nr_time(const srsran_sch_hl_cfg_nr_t* cfg,
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const srsran_rnti_type_t rnti_type,
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const srsran_search_space_type_t ss_type,
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const uint32_t coreset_id,
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const uint8_t m,
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srsran_sch_grant_nr_t* grant);
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/**
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* @brief Calculates the PDSCH time resource default A and stores it in the provided PDSCH NR grant. This can be used by
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* SI-RNTI, RA-RNTI, P-RNTI and C-RNTI. See Table 5.1.2.1.1-1 for more details about the usage.
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*
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* @remark Defined by TS 38.214 V15.10.0 Table 5.1.2.1.1-2: Default PDSCH time domain resource allocation A for normal
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* CP
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*
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* @param m Time domain resource assignment field value m of the DCI
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* @param dmrs_typeA_pos DMRS TypeA position provided by higher layers
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* @param[out] grant PDSCH mapping type
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* @return Returns SRSRAN_SUCCESS if the provided allocation is valid, otherwise it returns SRSRAN_ERROR code
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*/
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SRSRAN_API int
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srsran_ra_dl_nr_time_default_A(uint32_t m, srsran_dmrs_sch_typeA_pos_t dmrs_typeA_pos, srsran_sch_grant_nr_t* grant);
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/**
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* @brief Calculates the number of front load symbols
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*
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* @param cfg PDSCH NR configuration by upper layers
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* @param dci Provides PDSCH NR DCI
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* @param[out] dmrs_duration
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* @return SRSRAN_SUCCESS if provided arguments are valid, SRSRAN_ERROR code otherwise
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*/
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SRSRAN_API int srsran_ra_dl_nr_nof_front_load_symbols(const srsran_sch_hl_cfg_nr_t* cfg,
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const srsran_dci_dl_nr_t* dci,
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srsran_dmrs_sch_len_t* dmrs_duration);
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/**
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* @brief Calculates the number of DMRS CDM groups without data
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*
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* @remark Defined by TS 38.214 V15.10.0 5.1.6.2 DM-RS reception procedure
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*
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* @param cfg PDSCH NR configuration by upper layers
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* @param dci Provides PUSCH NR DCI
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* @return The number of DMRS CDM groups without data if the provided data is valid, otherwise it returns SRSRAN_ERROR
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* code
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*/
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SRSRAN_API int srsran_ra_dl_nr_nof_dmrs_cdm_groups_without_data(const srsran_sch_hl_cfg_nr_t* cfg,
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const srsran_dci_dl_nr_t* dci,
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uint32_t L);
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/**
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* @brief Calculates the PDSCH frequency resource allocation and stores it in the provided PDSCH NR grant.
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*
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* @remark Defined by TS 38.214 V15.10.0 section 5.1.2.2
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* @param carrier Carrier information
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* @param cfg PDSCH NR configuration by upper layers
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* @param dci_dl Unpacked DCI used to schedule the PDSCH grant
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* @param[out] grant Provides grant pointer to fill
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* @return SRSRAN_SUCCESS if the provided data is valid, SRSRAN_ERROR code otherwise
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*/
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SRSRAN_API int srsran_ra_dl_nr_freq(const srsran_carrier_nr_t* carrier,
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const srsran_sch_hl_cfg_nr_t* cfg,
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const srsran_dci_dl_nr_t* dci_dl,
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srsran_sch_grant_nr_t* grant);
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#endif // SRSRAN_RA_DL_NR_H
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