mirror of https://github.com/PentHertz/srsLTE.git
125 lines
4.2 KiB
C++
125 lines
4.2 KiB
C++
/*
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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_SCHEDULER_COMMON_H
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#define SRSLTE_SCHEDULER_COMMON_H
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#include "srslte/common/bounded_bitset.h"
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#include "srslte/interfaces/sched_interface.h"
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namespace srsenb {
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//! Struct used to store possible CCE locations.
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struct sched_dci_cce_t {
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uint32_t cce_start[4][6]; ///< Stores starting CCE for each aggr level index and CCE location index
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uint32_t nof_loc[4]; ///< Number of possible CCE locations for each aggregation level index
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};
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//! Params relative to a single TTI
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struct tti_params_t {
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uint32_t tti_rx;
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uint32_t tti_tx_dl;
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uint32_t tti_tx_ul;
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uint32_t sf_idx_tx_dl;
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uint32_t sfn_tx_dl;
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explicit tti_params_t(uint32_t tti_rx_);
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uint32_t tti_rx_ack_dl() const { return tti_tx_ul; }
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};
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//! structs to bundle together all the sched arguments, and share them with all the sched sub-components
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class sched_cell_params_t
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{
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struct regs_deleter {
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void operator()(srslte_regs_t* p)
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{
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if (p != nullptr) {
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srslte_regs_free(p);
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delete p;
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}
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}
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};
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public:
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bool set_cfg(uint32_t enb_cc_idx_,
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const sched_interface::cell_cfg_t& cfg_,
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const sched_interface::sched_args_t& sched_args);
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// convenience getters
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uint32_t prb_to_rbg(uint32_t nof_prbs) const { return (nof_prbs + (P - 1)) / P; }
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uint32_t nof_prb() const { return cfg.cell.nof_prb; }
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uint32_t enb_cc_idx = 0;
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sched_interface::cell_cfg_t cfg = {};
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const sched_interface::sched_args_t* sched_cfg = nullptr;
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std::unique_ptr<srslte_regs_t, regs_deleter> regs;
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std::array<sched_dci_cce_t, 3> common_locations = {};
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std::array<std::array<sched_dci_cce_t, 10>, 3> rar_locations = {};
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std::array<uint32_t, 3> nof_cce_table = {}; ///< map cfix -> nof cces in PDCCH
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uint32_t P = 0;
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uint32_t nof_rbgs = 0;
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};
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//! Bitmask used for CCE allocations
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using pdcch_mask_t = srslte::bounded_bitset<sched_interface::max_cce, true>;
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//! Bitmask that stores the allocared DL RBGs
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using rbgmask_t = srslte::bounded_bitset<25, true>;
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//! Bitmask that stores the allocated UL PRBs
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using prbmask_t = srslte::bounded_bitset<100, true>;
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/***********************
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* Helper Functions
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**********************/
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namespace sched_utils {
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inline uint32_t aggr_level(uint32_t aggr_idx)
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{
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return 1u << aggr_idx;
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}
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//! Obtain rvidx from nof retxs. This value is stored in DCI
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inline uint32_t get_rvidx(uint32_t retx_idx)
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{
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const static uint32_t rv_idx[4] = {0, 2, 3, 1};
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return rv_idx[retx_idx % 4];
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}
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/**
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* Generate possible CCE locations a user can use to allocate DCIs
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* @param regs Regs data for the given cell configuration
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* @param location Result of the CCE location computation.
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* @param cfi Number of control symbols used for the PDCCH
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* @param sf_idx subframe index specific to the tx TTI (relevant only for data and RAR transmissions)
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* @param rnti identity of the user (invalid RNTI for RAR and BC transmissions)
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*/
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void generate_cce_location(srslte_regs_t* regs,
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sched_dci_cce_t* location,
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uint32_t cfi,
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uint32_t sf_idx = 0,
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uint16_t rnti = SRSLTE_INVALID_RNTI);
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} // namespace sched_utils
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} // namespace srsenb
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#endif // SRSLTE_SCHEDULER_COMMON_H
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