mirror of https://github.com/pvnis/srsRAN_4G.git
Initial PHY Data procedures
Xavier Arteaga
4 years ago
committed by
Xavier Arteaga
parent
775692f461
commit
009f300c5e
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/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE 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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* srsLTE 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: pdsch_cfg_nr.h
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*
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* Description: Physical downlink shared channel configuration
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*
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* Reference:
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*****************************************************************************/
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#ifndef SRSLTE_PDSCH_CFG_NR_H
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#define SRSLTE_PDSCH_CFG_NR_H
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#include "srslte/phy/ch_estimation/dmrs_pdsch.h"
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#include "srslte/phy/common/phy_common_nr.h"
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#include "srslte/phy/fec/cbsegm.h"
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#include "srslte/phy/fec/softbuffer.h"
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#include "srslte/phy/phch/ra.h"
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/**
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* @brief flatten PDSCH time domain allocation parameters
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* @remark Described in TS 38.331 V15.10.0 Section PDSCH-TimeDomainResourceAllocationList
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*/
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typedef struct SRSLTE_API {
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/// Slot offset between DCI and its scheduled PDSCH
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uint32_t k0;
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/// PDSCH mapping type
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srslte_pdsch_mapping_type_t mapping_type;
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/// An index giving valid combinations of start symbol and length (jointly encoded) as start and length indicator
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/// (SLIV). The network configures the field so that the allocation does not cross the slot boundary
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uint32_t sliv;
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} srslte_pdsch_allocation_t;
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typedef struct SRSLTE_API {
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/// TBD
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} srslte_pdsch_grant_nr_t;
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typedef struct SRSLTE_API {
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srslte_pdsch_allocation_t allocation;
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/// PDSCH Start symbol index
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uint32_t S;
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/// PDSCH length in number of symbols
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uint32_t L;
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} srslte_pdsch_cfg_nr_t;
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#endif // SRSLTE_PDSCH_CFG_NR_H
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/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE 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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* srsLTE 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: UE downlink object for NR dataplane.
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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 SRSLTE_UE_DL_NR_DATA_H
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#define SRSLTE_UE_DL_NR_DATA_H
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#include "srslte/phy/common/phy_common_nr.h"
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#include "srslte/phy/phch/pdsch_cfg_nr.h"
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/**
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* @brief Calculates the PDSCH time resource provided by higher layers
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*
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* @remark Defined by TS 36.214 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 pdsch_alloc Flattened PHY PDSCH allocation configuration provided from higher layers
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* @param[out] S Start symbol
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* @param[out] L PDSCH transmission length in symbols
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* @return Returns SRSLTE_SUCCESS if the provided allocation is valid, otherwise it returns SRSLTE_ERROR code
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*/
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SRSLTE_API int
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srslte_ue_dl_nr_pdsch_time_resource_hl(const srslte_pdsch_allocation_t* pdsch_alloc, uint32_t* S, uint32_t* L);
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/**
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* @brief Calculates the PDSCH time resource default A. This can be used by SI-RNTI, RA-RNTI, P-RNTI and C-RNTI. See
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* 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 36.214 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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* @attention k0 shall be zero.
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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] S Start symbol
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* @param[out] L PDSCH transmission length in symbols
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* @return Returns SRSLTE_SUCCESS if the provided allocation is valid, otherwise it returns SRSLTE_ERROR code
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*/
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SRSLTE_API int srslte_ue_dl_nr_pdsch_time_resource_default_A(uint32_t m,
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srslte_dmrs_pdsch_typeA_pos_t dmrs_typeA_pos,
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uint32_t* S,
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uint32_t* L);
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#endif // SRSLTE_UE_DL_NR_DATA_H
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/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE 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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* srsLTE 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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#include "srslte/phy/ue/ue_dl_nr_data.h"
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static int srslte_ue_dl_nr_pdsch_time_resource_hl_A(uint32_t sliv, uint32_t* S, uint32_t* L)
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{
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// S values can be 0 to 3
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uint32_t low = sliv % 14;
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if (low < 7) {
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*S = low;
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*L = sliv / 14 + 1;
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} else {
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*S = 14 - 1 - low;
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*L = 14 - sliv / 14 + 1;
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}
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// Check values using Table 5.1.2.1-1
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if (*S > 3) {
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ERROR("Invalid SLIV %d. S (%d) is out-of-range {0,1,2,3}\n", sliv, *S);
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return SRSLTE_ERROR;
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}
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if (*L < 3 || *L > 14) {
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ERROR("Invalid SLIV %d. L (%d) is out-of-range {3,...,14}\n", sliv, *L);
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return SRSLTE_ERROR;
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}
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uint32_t sum = *S + *L;
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if (sum < 3) {
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ERROR("Invalid SLIV %d. The sum of S (%d) and L (%d) is lower than 3\n", sliv, *S, *L);
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return SRSLTE_ERROR;
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}
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if (sum > 14) {
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ERROR("Invalid SLIV %d. The sum of S (%d) and L (%d) is greater than 14\n", sliv, *S, *L);
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return SRSLTE_ERROR;
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}
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return SRSLTE_SUCCESS;
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}
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static int srslte_ue_dl_nr_pdsch_time_resource_hl_B(uint32_t sliv, uint32_t* S, uint32_t* L)
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{
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ERROR("Not implemented\n");
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return SRSLTE_ERROR;
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}
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int srslte_ue_dl_nr_pdsch_time_resource_hl(const srslte_pdsch_allocation_t* pdsch_alloc, uint32_t* S, uint32_t* L)
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{
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if (pdsch_alloc == NULL || S == NULL || L == NULL) {
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return SRSLTE_ERROR_INVALID_INPUTS;
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}
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if (pdsch_alloc->mapping_type == srslte_pdsch_mapping_type_A) {
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return srslte_ue_dl_nr_pdsch_time_resource_hl_A(pdsch_alloc->sliv, S, L);
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}
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return srslte_ue_dl_nr_pdsch_time_resource_hl_B(pdsch_alloc->sliv, S, L);
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}
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int srslte_ue_dl_nr_pdsch_time_resource_default_A(uint32_t m,
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srslte_dmrs_pdsch_typeA_pos_t dmrs_typeA_pos,
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uint32_t* S,
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uint32_t* L)
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{
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if (S == NULL || L == NULL) {
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return SRSLTE_ERROR_INVALID_INPUTS;
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}
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if (m >= 16) {
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ERROR("m (%d) is out-of-range\n", m);
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return SRSLTE_ERROR_INVALID_INPUTS;
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}
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static uint32_t S_pos2[16] = {2, 2, 2, 2, 2, 9, 4, 5, 5, 9, 12, 1, 1, 2, 4, 8};
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static uint32_t L_pos2[16] = {12, 10, 9, 7, 5, 4, 4, 7, 2, 2, 2, 13, 6, 4, 7, 4};
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static uint32_t S_pos3[16] = {3, 3, 3, 3, 3, 10, 6, 5, 5, 9, 12, 1, 1, 2, 4, 8};
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static uint32_t L_pos3[16] = {11, 9, 8, 6, 4, 4, 4, 7, 2, 2, 2, 13, 6, 4, 7, 4};
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switch (dmrs_typeA_pos) {
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case srslte_dmrs_pdsch_typeA_pos_2:
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*S = S_pos2[m];
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*L = L_pos2[m];
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break;
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case srslte_dmrs_pdsch_typeA_pos_3:
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*S = S_pos3[m];
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*L = L_pos3[m];
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break;
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default:
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ERROR("Undefined case (%d)\n", dmrs_typeA_pos);
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return SRSLTE_ERROR;
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}
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return SRSLTE_SUCCESS;
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}
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