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112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
/**
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* Copyright 2013-2021 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_SCI_H
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#define SRSLTE_SCI_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_sl.h"
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#define SRSLTE_SCI_MSG_MAX_LEN 80
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#define SRSLTE_SCI_CRC_LEN (16)
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#define SRSLTE_SCI_MAX_LEN (45)
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#define SRSLTE_SCI_TM34_LEN (32)
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typedef enum { SRSLTE_SCI_FORMAT0 = 0, SRSLTE_SCI_FORMAT1 } srslte_sci_format_t;
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/**
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* Sidelink Control Information - Sidelink (SCI0 and SCI1).
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*
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* \brief SCI0/1 packing/unpacking functions to convert between bit streams
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*
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* Reference: 3GPP TS 36.212 version 15.6.0 Release 15 Section 5.4.3
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*/
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typedef struct SRSLTE_API {
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srslte_sl_tm_t tm;
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uint32_t sci_len;
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uint32_t nof_prb;
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srslte_sci_format_t format;
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// sizeSubChannel
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uint32_t size_sub_channel;
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// numSubChannel
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uint32_t num_sub_channel;
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///< SCI Format 0: Resource block assignment and hopping resource allocation
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///< SCI Format 1: Frequency resource location (0,3,6,7,8 bits)
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uint32_t riv;
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// Modulation and coding scheme (bits);
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uint32_t mcs_idx;
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///< SCI Format 0
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// Frequency hopping flag (1 bit)
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bool freq_hopping_flag;
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uint32_t hopping_bits;
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// TRP - Time resource pattern (7bits)
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uint32_t trp_idx;
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// Timing advance indication (11 bits)
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uint32_t timing_advance;
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// Group ID (8 bits)
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uint32_t N_sa_id;
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///< SCI Format 1
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// Priority (3bits)
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uint32_t priority;
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// Resource reservation (4 bits)
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uint32_t resource_reserv;
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// Time gap (4 bits)
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uint32_t time_gap;
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// Retransmission index (1 bit)
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bool retransmission;
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// Transmission format (1 bit)
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// 1 means transmission format including rate-matching and TBS scaling
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// 0 means transmission format including puncturing and no TBS-scaling
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uint32_t transmission_format;
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} srslte_sci_t;
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SRSLTE_API int
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srslte_sci_init(srslte_sci_t* q, srslte_cell_sl_t cell, srslte_sl_comm_resource_pool_t sl_comm_resource_pool);
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SRSLTE_API int srslte_sci_format0_pack(srslte_sci_t* q, uint8_t* output);
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SRSLTE_API int srslte_sci_format1_pack(srslte_sci_t* q, uint8_t* output);
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SRSLTE_API int srslte_sci_format0_unpack(srslte_sci_t* q, uint8_t* input);
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SRSLTE_API int srslte_sci_format1_unpack(srslte_sci_t* q, uint8_t* input);
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SRSLTE_API void srslte_sci_info(const srslte_sci_t* sci, char* str, uint32_t len);
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SRSLTE_API void srslte_sci_free(srslte_sci_t* q);
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#endif // SRSLTE_SCI_H
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