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176 lines
7.9 KiB
C
176 lines
7.9 KiB
C
/*
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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: phy_common_sl.h
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*
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* Description: Common parameters and lookup functions for Sidelink PHY
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*
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* Reference: 3GPP TS 36.211 version 15.3.0 Release 15
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*********************************************************************************************/
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#ifndef SRSLTE_PHY_COMMON_SL_H
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#define SRSLTE_PHY_COMMON_SL_H
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/**
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* \brief Common parameters and lookup functions for Sidelink PHY
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*/
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#include "srslte/phy/common/phy_common.h"
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typedef enum SRSLTE_API {
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SRSLTE_SIDELINK_TM1 = 0,
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SRSLTE_SIDELINK_TM2,
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SRSLTE_SIDELINK_TM3,
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SRSLTE_SIDELINK_TM4
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} srslte_sl_tm_t;
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typedef enum SRSLTE_API {
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SRSLTE_SIDELINK_PSBCH = 0, // Physical Sidelink Broadcast Channel
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SRSLTE_SIDELINK_PSCCH, // Physical Sidelink Control Channel
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SRSLTE_SIDELINK_PSSCH, // Physical Sidelink Shared Channel
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SRSLTE_SIDELINK_PSDCH // Physical Sidelink Discovery Channel
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} srslte_sl_channels_t;
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typedef struct SRSLTE_API {
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srslte_sl_tm_t tm;
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uint32_t N_sl_id;
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uint32_t nof_prb;
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srslte_cp_t cp;
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} srslte_cell_sl_t;
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#define SRSLTE_SL_MAX_PERIOD_LENGTH 320 // SL-PeriodComm-r12 3GPP TS 36.331 Section 6.3.8
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// SL-CommResourcePool: 3GPP TS 36.331 version 15.6.0 Release 15 Section 6.3.8
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typedef struct SRSLTE_API {
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uint32_t period_length;
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uint32_t prb_num;
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uint32_t prb_start;
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uint32_t prb_end;
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uint8_t pscch_sf_bitmap[SRSLTE_SL_MAX_PERIOD_LENGTH];
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uint8_t pssch_sf_bitmap[SRSLTE_SL_MAX_PERIOD_LENGTH];
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uint32_t size_sub_channel; // sizeSubchannel-r14
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uint32_t num_sub_channel; // numSubchannel-r14
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uint32_t start_prb_sub_channel; // startRB-Subchannel-r14 offset
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bool adjacency_pscch_pssch; // adjacencyPSCCH-PSSCH-r14
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uint32_t sf_bitmap_tm34_len;
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uint8_t sf_bitmap_tm34[SRSLTE_SL_MAX_PERIOD_LENGTH]; // sl_Subframe_r14: 3GPP 36.331 Section 6.3.8
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} srslte_sl_comm_resource_pool_t;
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typedef enum SRSLTE_API {
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SRSLTE_SIDELINK_DATA_SYMBOL = 0,
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SRSLTE_SIDELINK_SYNC_SYMBOL,
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SRSLTE_SIDELINK_DMRS_SYMBOL,
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SRSLTE_SIDELINK_GUARD_SYMBOL
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} srslte_sl_symbol_t;
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#define SRSLTE_SL_DUPLEX_MODE_FDD (1)
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#define SRSLTE_SL_DUPLEX_MODE_TDD (2)
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#define SRSLTE_SLSS_SIDE_PEAK_OFFSET (0.005f)
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#define SRSLTE_SLSS_SIDE_PEAK_THRESHOLD_HIGH (0.49f) // square(0.7), max 70% of main peak
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#define SRSLTE_SLSS_SIDE_PEAK_THRESHOLD_LOW (0.09f) // square(0.3), min 30% of main peak
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#define SRSLTE_PSBCH_NOF_PRB (6)
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#define SRSLTE_PSCCH_TM34_NOF_PRB (2)
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#define SRSLTE_MIB_SL_LEN (40) // TM1/2: 40 bits
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#define SRSLTE_MIB_SL_V2X_LEN (48) // TM3/4: 48 bits
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#define SRSLTE_MIB_SL_MAX_LEN (SRSLTE_MIB_SL_V2X_LEN)
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#define SRSLTE_SL_TM12_DEFAULT_NUM_DMRS_SYMBOLS (2)
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#define SRSLTE_SL_TM34_DEFAULT_NUM_DMRS_SYMBOLS (4) ///< In TM3/4, all channels have 4 DMRS by default
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#define SRSLTE_PSBCH_TM12_NUM_DATA_SYMBOLS (8) // PSBCH is in 8 OFDM symbols (but only 7 are tx'ed)
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#define SRSLTE_PSBCH_TM12_NUM_DATA_SYMBOLS_EXT \
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(6) // PSBCH is in 7 OFDM symbols for extended cyclic prefix (but only 6 are tx'ed)
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#define SRSLTE_PSBCH_TM12_NUM_DMRS_SYMBOLS (2) ///< PSBCH has 2 DMRS symbols
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#define SRSLTE_PSBCH_TM12_NUM_SYNC_SYMBOLS (4) ///< Two symbols PSSS and two SSSS
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#define SRSLTE_PSBCH_TM34_NUM_DATA_SYMBOLS (7) ///< SL-BCH is in 7 OFDM symbols (but only 6 are tx'ed)
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#define SRSLTE_PSBCH_TM34_NUM_DMRS_SYMBOLS (3) ///< PSBCH has 3 DMRS symbols in TM3 and TM4
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#define SRSLTE_PSBCH_TM34_NUM_SYNC_SYMBOLS (4) ///< Two symbols PSSS and two SSSS
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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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#define SRSLTE_PSCCH_QM 2
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#define SRSLTE_PSCCH_TM12_NOF_PRB (1)
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#define SRSLTE_PSCCH_TM34_NOF_PRB (2)
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#define SRSLTE_PSCCH_MAX_NOF_PRB (SRSLTE_PSCCH_TM34_NOF_PRB)
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#define SRSLTE_PSCCH_SCRAMBLING_SEED (510) ///< Scrambling seed for PSCCH is 510
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#define SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS (12)
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#define SRSLTE_PSCCH_TM12_NUM_DMRS_SYMBOLS (2)
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#define SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS_EXT (10)
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#define SRSLTE_PSCCH_TM34_NUM_DATA_SYMBOLS (10)
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#define SRSLTE_PSCCH_TM34_NUM_DMRS_SYMBOLS (4)
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#define SRSLTE_PSCCH_TM12_NOF_CODED_BITS \
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(SRSLTE_NRE * SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS * SRSLTE_PSCCH_TM12_NOF_PRB * SRSLTE_PSCCH_QM)
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#define SRSLTE_PSCCH_TM34_NOF_CODED_BITS \
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(SRSLTE_NRE * SRSLTE_PSCCH_TM34_NUM_DATA_SYMBOLS * SRSLTE_PSCCH_TM34_NOF_PRB * SRSLTE_PSCCH_QM)
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#define SRSLTE_PSCCH_MAX_CODED_BITS SRSLTE_MAX(SRSLTE_PSCCH_TM12_NOF_CODED_BITS, SRSLTE_PSCCH_TM34_NOF_CODED_BITS)
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#define SRSLTE_PSSCH_MAX_QM 6
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#define SRSLTE_PSSCH_CRC_LEN 24
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#define SRSLTE_MAX_CODEWORD_LEN 168000 // 12 subcarriers * 100 PRB * 14 symbols * 10 bits, assuming 1024QAM
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#define SRSLTE_SL_SCH_MAX_TB_LEN (48936) // 3GPP 36.306 v15.4.0 Table 4.1B-1
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#define SRSLTE_PSSCH_MAX_CODED_BITS (3 * SRSLTE_TCOD_MAX_LEN_CB + SRSLTE_TCOD_TOTALTAIL)
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#define SRSLTE_PSSCH_TM12_NUM_DATA_SYMBOLS (12) // PSSCH is in 12 OFDM symbols (but only 11 are tx'ed)
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#define SRSLTE_PSSCH_TM12_NUM_DMRS_SYMBOLS (2) // PSSCH has 2 DMRS symbols in TM1 and TM2
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#define SRSLTE_PSSCH_TM12_NUM_DATA_SYMBOLS_CP_EXT \
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(10) // PSSCH is in 10 OFDM symbols for extended cyclic prefix (but only 9 are tx'ed)
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#define SRSLTE_PSSCH_TM12_NUM_DMRS_SYMBOLS_CP_EXT \
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(2) // PSSCH has 2 DMRS symbols for extended cyclic prefix in TM1 and TM2
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#define SRSLTE_PSSCH_TM34_NUM_DATA_SYMBOLS (10) // PSSCH is in 10 OFDM symbols (but only 9 are tx'ed)
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#define SRSLTE_PSSCH_TM34_NUM_DMRS_SYMBOLS (4) // PSSCH has 4 DMRS symbols in TM3 and TM4
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SRSLTE_API int srslte_sl_group_hopping_f_gh(uint32_t f_gh[SRSLTE_NSLOTS_X_FRAME * 2], uint32_t N_x_id);
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#define SRSLTE_PSCCH_MAX_NUM_DATA_SYMBOLS (SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS)
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SRSLTE_API bool srslte_slss_side_peak_pos_is_valid(uint32_t side_peak_pos,
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uint32_t main_peak_pos,
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uint32_t side_peak_delta_a,
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uint32_t side_peak_delta_b);
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SRSLTE_API bool srslte_slss_side_peak_value_is_valid(float side_peak_value, float threshold_low, float threshold_high);
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SRSLTE_API int srslte_sl_tm_to_cell_sl_tm_t(srslte_cell_sl_t* q, uint32_t tm);
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SRSLTE_API uint32_t srslte_sl_get_num_symbols(srslte_sl_tm_t tm, srslte_cp_t cp);
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SRSLTE_API bool srslte_psbch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i, srslte_cp_t cp);
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SRSLTE_API bool srslte_pscch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i, srslte_cp_t cp);
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SRSLTE_API bool srslte_pssch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i, srslte_cp_t cp);
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SRSLTE_API uint32_t srslte_sci_format0_sizeof(uint32_t nof_prb);
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SRSLTE_API int srslte_sl_comm_resource_pool_get_default_config(srslte_sl_comm_resource_pool_t* q,
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srslte_cell_sl_t cell);
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#endif // SRSLTE_PHY_COMMON_SL_H
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