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99 lines
4.6 KiB
C
99 lines
4.6 KiB
C
5 years ago
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/*
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* Copyright 2013-2019 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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#ifndef SRSLTE_PUCCH_PROC_H_
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#define SRSLTE_PUCCH_PROC_H_
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#include "srslte/config.h"
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#include "srslte/phy/ch_estimation/chest_ul.h"
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/common/sequence.h"
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#include "srslte/phy/modem/mod.h"
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#include "srslte/phy/phch/pucch.h"
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#include "srslte/phy/phch/uci.h"
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#define SRSLTE_PUCCH_MAX_ALLOC 4
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/**
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* Implements 3GPP 36.213 R10 10.1 PUCCH format selection
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* @param cell cell configuration
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* @param cfg PUCCH configuration struct
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* @param uci_cfg uplink control information configuration
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* @param uci_value uplink control information data, use NULL if unavailable
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* @return
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*/
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SRSLTE_API srslte_pucch_format_t srslte_pucch_proc_select_format(const srslte_cell_t* cell,
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const srslte_pucch_cfg_t* cfg,
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const srslte_uci_cfg_t* uci_cfg,
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const srslte_uci_value_t* uci_value);
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/**
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* Determines the possible n_pucch_i resources/locations for PUCCH. It follows 3GPP 36.213 R10 10.1 UE procedure for
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* determining physical uplink control channel assignment.
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*
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* @param cell cell configuration
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* @param cfg PUCCH configuration struct
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* @param uci_cfg uplink control information configuration
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* @param uci_value uplink control information value
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* @param n_pucch_i table with the PUCCH format 1b possible resources
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* @return Returns the number of entries in the table or negative value indicating error
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*/
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SRSLTE_API int srslte_pucch_proc_get_resources(const srslte_cell_t* cell,
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const srslte_pucch_cfg_t* cfg,
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const srslte_uci_cfg_t* uci_cfg,
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const srslte_uci_value_t* uci_value,
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uint32_t* n_pucch_i);
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/**
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* Determines the n_pucch resource for PUCCH.
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* @param cell Cell setup
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* @param cfg PUCCH configuration
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* @param uci_cfg UCI configuration (CS and TDD HARQ-ACK modes may modify this value)
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* @param uci_value UCI Value (CS and TDD HARQ-ACK modes may modify this value)
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* @param b Selected ACK-NACK bits after HARQ-ACK feedback mode "encoding"
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* @return the selected resource
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*/
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SRSLTE_API uint32_t srslte_pucch_proc_get_npucch(const srslte_cell_t* cell,
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const srslte_pucch_cfg_t* cfg,
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const srslte_uci_cfg_t* uci_cfg,
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const srslte_uci_value_t* uci_value,
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uint8_t b[SRSLTE_UCI_MAX_ACK_BITS]);
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/**
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* Decodes the HARQ ACK bits from a selected resource (j) and received bits (b)
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* 3GPP 36.213 R10 10.1.2.2.1 PUCCH format 1b with channel selection HARQ-ACK procedure
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* tables:
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* - Table 10.1.2.2.1-3: Transmission of Format 1b HARQ-ACK channel selection for A = 2
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* - Table 10.1.2.2.1-4: Transmission of Format 1b HARQ-ACK channel selection for A = 3
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* - Table 10.1.2.2.1-5: Transmission of Format 1b HARQ-ACK channel selection for A = 4
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* @param cfg PUCCH configuration struct
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* @param uci_cfg uplink control information configuration
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* @param j selected channel
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* @param b received bits
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* @return Returns SRSLTE_SUCCESS if it can decode it succesfully, SRSLTE_ERROR code otherwise
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*/
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SRSLTE_API int srslte_pucch_cs_get_ack(const srslte_pucch_cfg_t* cfg,
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const srslte_uci_cfg_t* uci_cfg,
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uint32_t j,
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const uint8_t b[SRSLTE_PUCCH_1B_2B_NOF_ACK],
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srslte_uci_value_t* uci_value);
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#endif // SRSLTE_PUCCH_PROC_H_
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