/** * * \section COPYRIGHT * * Copyright 2013-2015 Software Radio Systems Limited * * \section LICENSE * * This file is part of the srsLTE library. * * srsLTE is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * srsLTE is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * A copy of the GNU Affero General Public License can be found in * the LICENSE file in the top-level directory of this distribution * and at http://www.gnu.org/licenses/. * */ /****************************************************************************** * File: ra.h * * Description: Structures and utility functions for DL/UL resource allocation. * Convert an UL/DL unpacket DCI message to a resource allocation * * Reference: 3GPP TS 36.213 version 10.0.1 Release 10 *****************************************************************************/ #ifndef SRSLTE_RA_H #define SRSLTE_RA_H #include #include #include "srslte/config.h" #include "srslte/phy/common/phy_common.h" /************************************************** * Common structures used for Resource Allocation **************************************************/ typedef struct SRSLTE_API { srslte_mod_t mod; int tbs; uint32_t idx; } srslte_ra_mcs_t; /* Structure that gives the number of encoded bits and RE for a UL/DL grant */ typedef struct { uint32_t lstart; uint32_t nof_symb; uint32_t nof_bits; uint32_t nof_re; } srslte_ra_nbits_t; typedef enum SRSLTE_API { SRSLTE_RA_ALLOC_TYPE0 = 0, SRSLTE_RA_ALLOC_TYPE1 = 1, SRSLTE_RA_ALLOC_TYPE2 = 2 } srslte_ra_type_t; typedef struct SRSLTE_API { uint32_t rbg_bitmask; } srslte_ra_type0_t; typedef struct SRSLTE_API { uint32_t vrb_bitmask; uint32_t rbg_subset; bool shift; } srslte_ra_type1_t; typedef struct SRSLTE_API { uint32_t riv; // if L_crb==0, DCI message packer will take this value directly uint32_t L_crb; uint32_t RB_start; enum { SRSLTE_RA_TYPE2_NPRB1A_2 = 0, SRSLTE_RA_TYPE2_NPRB1A_3 = 1 } n_prb1a; enum { SRSLTE_RA_TYPE2_NG1 = 0, SRSLTE_RA_TYPE2_NG2 = 1 } n_gap; enum { SRSLTE_RA_TYPE2_LOC = 0, SRSLTE_RA_TYPE2_DIST = 1 } mode; } srslte_ra_type2_t; /************************************************** * Structures used for Downlink Resource Allocation **************************************************/ typedef struct SRSLTE_API { bool prb_idx[2][SRSLTE_MAX_PRB]; uint32_t nof_prb; uint32_t Qm[SRSLTE_MAX_CODEWORDS]; srslte_ra_mcs_t mcs[SRSLTE_MAX_CODEWORDS]; srslte_sf_t sf_type; bool tb_en[SRSLTE_MAX_CODEWORDS]; uint32_t pinfo; bool tb_cw_swap; } srslte_ra_dl_grant_t; #define SRSLTE_RA_DL_GRANT_NOF_TB(G) ((((G)->tb_en[0])?1:0)+(((G)->tb_en[1])?1:0)) /** Unpacked DCI message for DL grant */ typedef struct SRSLTE_API { srslte_ra_type_t alloc_type; union { srslte_ra_type0_t type0_alloc; srslte_ra_type1_t type1_alloc; srslte_ra_type2_t type2_alloc; }; uint32_t harq_process; uint32_t mcs_idx; int rv_idx; bool ndi; uint32_t mcs_idx_1; int rv_idx_1; bool ndi_1; bool tb_cw_swap; bool sram_id; uint8_t pinfo; bool pconf; bool power_offset; uint8_t tpc_pucch; bool tb_en[2]; bool is_ra_order; uint32_t ra_preamble; uint32_t ra_mask_idx; bool dci_is_1a; bool dci_is_1c; } srslte_ra_dl_dci_t; /************************************************** * Structures used for Uplink Resource Allocation **************************************************/ typedef struct SRSLTE_API { uint32_t n_prb[2]; uint32_t n_prb_tilde[2]; uint32_t L_prb; uint32_t freq_hopping; uint32_t M_sc; uint32_t M_sc_init; uint32_t Qm; srslte_ra_mcs_t mcs; uint32_t ncs_dmrs; } srslte_ra_ul_grant_t; /** Unpacked DCI Format0 message */ typedef struct SRSLTE_API { /* 36.213 Table 8.4-2: SRSLTE_RA_PUSCH_HOP_HALF is 0 for < 10 Mhz and 10 for > 10 Mhz. * SRSLTE_RA_PUSCH_HOP_QUART is 00 for > 10 Mhz and SRSLTE_RA_PUSCH_HOP_QUART_NEG is 01 for > 10 Mhz. */ enum { SRSLTE_RA_PUSCH_HOP_DISABLED = -1, SRSLTE_RA_PUSCH_HOP_QUART = 0, SRSLTE_RA_PUSCH_HOP_QUART_NEG = 1, SRSLTE_RA_PUSCH_HOP_HALF = 2, SRSLTE_RA_PUSCH_HOP_TYPE2 = 3 } freq_hop_fl; srslte_ra_ul_grant_t prb_alloc; srslte_ra_type2_t type2_alloc; uint32_t mcs_idx; uint32_t rv_idx; uint32_t n_dmrs; bool ndi; bool cqi_request; uint8_t tpc_pusch; } srslte_ra_ul_dci_t; typedef union { srslte_ra_ul_grant_t ul; srslte_ra_dl_grant_t dl; } srslte_phy_grant_t; #define SRSLTE_PHY_GRANT_LEN sizeof(srslte_phy_grant_t) /************************************************** * Functions **************************************************/ SRSLTE_API int srslte_ra_dl_dci_to_grant(srslte_ra_dl_dci_t *dci, uint32_t nof_prb, uint16_t rnti, srslte_ra_dl_grant_t *grant); SRSLTE_API void srslte_ra_dl_grant_to_nbits(srslte_ra_dl_grant_t *grant, uint32_t cfi, srslte_cell_t cell, uint32_t sf_idx, srslte_ra_nbits_t nbits[SRSLTE_MAX_CODEWORDS]); SRSLTE_API uint32_t srslte_ra_dl_approx_nof_re(srslte_cell_t cell, uint32_t nof_prb, uint32_t nof_ctrl_symbols); SRSLTE_API uint32_t srslte_ra_dl_grant_nof_re(srslte_ra_dl_grant_t *grant, srslte_cell_t cell, uint32_t sf_idx, uint32_t nof_ctrl_symbols); SRSLTE_API int srslte_ra_ul_dci_to_grant(srslte_ra_ul_dci_t *dci, uint32_t nof_prb, uint32_t n_rb_ho, srslte_ra_ul_grant_t *grant); SRSLTE_API void srslte_ra_ul_grant_to_nbits(srslte_ra_ul_grant_t *grant, srslte_cp_t cp, uint32_t N_srs, srslte_ra_nbits_t *nbits); SRSLTE_API int srslte_ra_ul_dci_to_grant_prb_allocation(srslte_ra_ul_dci_t *dci, srslte_ra_ul_grant_t *grant, uint32_t n_rb_ho, uint32_t nof_prb); SRSLTE_API int srslte_ra_dl_dci_to_grant_prb_allocation(srslte_ra_dl_dci_t *dci, srslte_ra_dl_grant_t *grant, uint32_t nof_prb); SRSLTE_API int srslte_ra_tbs_idx_from_mcs(uint32_t mcs); SRSLTE_API srslte_mod_t srslte_ra_mod_from_mcs(uint32_t mcs); SRSLTE_API int srslte_ra_mcs_from_tbs_idx(uint32_t tbs_idx); SRSLTE_API int srslte_ra_tbs_from_idx(uint32_t tbs_idx, uint32_t n_prb); SRSLTE_API int srslte_ra_tbs_to_table_idx(uint32_t tbs, uint32_t n_prb); SRSLTE_API uint32_t srslte_ra_type0_P(uint32_t nof_prb); SRSLTE_API uint32_t srslte_ra_type2_to_riv(uint32_t L_crb, uint32_t RB_start, uint32_t nof_prb); SRSLTE_API void srslte_ra_type2_from_riv(uint32_t riv, uint32_t *L_crb, uint32_t *RB_start, uint32_t nof_prb, uint32_t nof_vrb); SRSLTE_API uint32_t srslte_ra_type2_n_vrb_dl(uint32_t nof_prb, bool ngap_is_1); SRSLTE_API uint32_t srslte_ra_type2_n_rb_step(uint32_t nof_prb); SRSLTE_API uint32_t srslte_ra_type2_ngap(uint32_t nof_prb, bool ngap_is_1); SRSLTE_API uint32_t srslte_ra_type1_N_rb(uint32_t nof_prb); SRSLTE_API void srslte_ra_pdsch_fprint(FILE *f, srslte_ra_dl_dci_t *ra, uint32_t nof_prb); SRSLTE_API void srslte_ra_dl_grant_fprint(FILE *f, srslte_ra_dl_grant_t *grant); SRSLTE_API void srslte_ra_prb_fprint(FILE *f, srslte_ra_dl_grant_t *grant); SRSLTE_API void srslte_ra_pusch_fprint(FILE *f, srslte_ra_ul_dci_t *ra, uint32_t nof_prb); SRSLTE_API void srslte_ra_ul_grant_fprint(FILE *f, srslte_ra_ul_grant_t *grant); SRSLTE_API int srslte_dl_fill_ra_mcs_pmch(srslte_ra_mcs_t *mcs, uint32_t nprb); SRSLTE_API int srslte_dl_fill_ra_mcs(srslte_ra_mcs_t *mcs, uint32_t nprb); #endif // SRSLTE_RA_H