281 lines
12 KiB
C++
281 lines
12 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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#ifndef SRSENB_SCHEDULER_UE_H
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#define SRSENB_SCHEDULER_UE_H
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#include "scheduler_common.h"
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#include "srslte/common/log.h"
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#include "srslte/mac/pdu.h"
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#include <map>
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#include <vector>
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#include "scheduler_harq.h"
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#include <deque>
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namespace srsenb {
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struct cc_sched_ue {
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const static int SCHED_MAX_HARQ_PROC = FDD_HARQ_DELAY_UL_MS + FDD_HARQ_DELAY_DL_MS;
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cc_sched_ue(const sched_interface::ue_cfg_t& cfg_,
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const sched_cell_params_t& cell_cfg_,
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uint16_t rnti_,
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uint32_t ue_cc_idx);
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void reset();
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void set_cfg(const sched_interface::ue_cfg_t& cfg); ///< reconfigure ue carrier
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uint32_t get_aggr_level(uint32_t nof_bits);
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int alloc_tbs(uint32_t nof_prb, uint32_t nof_re, uint32_t req_bytes, bool is_ul, int* mcs);
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int alloc_tbs_dl(uint32_t nof_prb, uint32_t nof_re, uint32_t req_bytes, int* mcs);
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int alloc_tbs_ul(uint32_t nof_prb, uint32_t nof_re, uint32_t req_bytes, int* mcs);
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int get_required_prb_dl(uint32_t req_bytes, uint32_t nof_ctrl_symbols);
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uint32_t get_required_prb_ul(uint32_t req_bytes);
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const sched_cell_params_t* get_cell_cfg() const { return cell_params; }
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bool is_active() const { return active; }
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void set_dl_cqi(uint32_t tti_tx_dl, uint32_t dl_cqi);
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harq_entity harq_ent;
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uint32_t dl_ri = 0;
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uint32_t dl_ri_tti = 0;
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uint32_t dl_pmi = 0;
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uint32_t dl_pmi_tti = 0;
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uint32_t dl_cqi = 1;
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uint32_t dl_cqi_tti = 0;
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uint32_t ul_cqi = 1;
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uint32_t ul_cqi_tti = 0;
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bool dl_cqi_rx = false;
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uint32_t max_mcs_dl = 28, max_mcs_dl_alt = 27, max_mcs_ul = 28;
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uint32_t max_aggr_level = 3;
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int fixed_mcs_ul = 0, fixed_mcs_dl = 0;
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// Allowed DCI locations per per CFI and per subframe
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std::array<std::array<sched_dci_cce_t, 10>, 3> dci_locations = {};
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private:
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// config
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srslte::log_ref log_h;
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const sched_interface::ue_cfg_t* cfg = nullptr;
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const sched_cell_params_t* cell_params = nullptr;
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uint16_t rnti;
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uint32_t ue_cc_idx = 0;
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bool active = false;
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};
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/** This class is designed to be thread-safe because it is called from workers through scheduler thread and from
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* higher layers and mac threads.
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*/
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class sched_ue
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{
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public:
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/*************************************************************
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*
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* FAPI-like Interface
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*
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************************************************************/
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sched_ue();
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void reset();
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void phy_config_enabled(uint32_t tti, bool enabled);
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void init(uint16_t rnti, const std::vector<sched_cell_params_t>& cell_list_params_);
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void set_cfg(const sched_interface::ue_cfg_t& cfg);
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void set_bearer_cfg(uint32_t lc_id, srsenb::sched_interface::ue_bearer_cfg_t* cfg);
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void rem_bearer(uint32_t lc_id);
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void dl_buffer_state(uint8_t lc_id, uint32_t tx_queue, uint32_t retx_queue);
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void ul_buffer_state(uint8_t lc_id, uint32_t bsr, bool set_value = true);
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void ul_phr(int phr);
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void mac_buffer_state(uint32_t ce_code, uint32_t nof_cmds);
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void ul_recv_len(uint32_t lcid, uint32_t len);
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void set_ul_cqi(uint32_t tti, uint32_t enb_cc_idx, uint32_t cqi, uint32_t ul_ch_code);
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void set_dl_ri(uint32_t tti, uint32_t enb_cc_idx, uint32_t ri);
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void set_dl_pmi(uint32_t tti, uint32_t enb_cc_idx, uint32_t ri);
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void set_dl_cqi(uint32_t tti, uint32_t enb_cc_idx, uint32_t cqi);
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int set_ack_info(uint32_t tti, uint32_t enb_cc_idx, uint32_t tb_idx, bool ack);
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void set_ul_crc(srslte::tti_point tti_rx, uint32_t enb_cc_idx, bool crc_res);
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/*******************************************************
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* Custom functions
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*******************************************************/
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void tpc_inc();
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void tpc_dec();
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const dl_harq_proc& get_dl_harq(uint32_t idx, uint32_t cc_idx) const;
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uint16_t get_rnti() const { return rnti; }
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std::pair<bool, uint32_t> get_cell_index(uint32_t enb_cc_idx) const;
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const sched_interface::ue_cfg_t& get_ue_cfg() const { return cfg; }
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uint32_t get_aggr_level(uint32_t ue_cc_idx, uint32_t nof_bits);
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/*******************************************************
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* Functions used by scheduler metric objects
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*******************************************************/
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uint32_t get_required_prb_ul(uint32_t cc_idx, uint32_t req_bytes);
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rbg_range_t get_required_dl_rbgs(uint32_t ue_cc_idx);
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std::pair<uint32_t, uint32_t> get_requested_dl_bytes(uint32_t ue_cc_idx);
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uint32_t get_pending_dl_new_data();
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uint32_t get_pending_ul_new_data(uint32_t tti);
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uint32_t get_pending_ul_old_data(uint32_t cc_idx);
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uint32_t get_pending_dl_new_data_total();
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dl_harq_proc* get_pending_dl_harq(uint32_t tti_tx_dl, uint32_t cc_idx);
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dl_harq_proc* get_empty_dl_harq(uint32_t tti_tx_dl, uint32_t cc_idx);
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ul_harq_proc* get_ul_harq(uint32_t tti, uint32_t ue_cc_idx);
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/*******************************************************
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* Functions used by the scheduler carrier object
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*******************************************************/
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void finish_tti(const tti_params_t& tti_params, uint32_t enb_cc_idx);
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/*******************************************************
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* Functions used by the scheduler object
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*******************************************************/
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void set_sr();
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void unset_sr();
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int generate_dl_dci_format(uint32_t pid,
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sched_interface::dl_sched_data_t* data,
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uint32_t tti,
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uint32_t ue_cc_idx,
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uint32_t cfi,
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const rbgmask_t& user_mask);
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int generate_format0(sched_interface::ul_sched_data_t* data,
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uint32_t tti,
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uint32_t cc_idx,
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ul_harq_proc::ul_alloc_t alloc,
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bool needs_pdcch,
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srslte_dci_location_t cce_range,
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int explicit_mcs = -1);
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srslte_dci_format_t get_dci_format();
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sched_dci_cce_t* get_locations(uint32_t enb_cc_idx, uint32_t current_cfi, uint32_t sf_idx);
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cc_sched_ue* get_ue_carrier(uint32_t enb_cc_idx);
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bool needs_cqi(uint32_t tti, uint32_t cc_idx, bool will_send = false);
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uint32_t get_max_retx();
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bool pucch_sr_collision(uint32_t current_tti, uint32_t n_cce);
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static int cqi_to_tbs(uint32_t cqi,
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uint32_t nof_prb,
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uint32_t nof_re,
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uint32_t max_mcs,
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uint32_t max_Qm,
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bool use_tbs_index_alt,
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bool is_ul,
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uint32_t* mcs);
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private:
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struct ue_bearer_t {
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sched_interface::ue_bearer_cfg_t cfg = {};
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int buf_tx = 0;
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int buf_retx = 0;
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int bsr = 0;
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};
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void set_bearer_cfg_unlocked(uint32_t lc_id, const sched_interface::ue_bearer_cfg_t& cfg_);
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bool is_sr_triggered();
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int alloc_rlc_pdu(sched_interface::dl_sched_pdu_t* mac_sdu, int rem_tbs);
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uint32_t allocate_mac_sdus(sched_interface::dl_sched_data_t* data, uint32_t total_tbs, uint32_t tbidx);
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uint32_t allocate_mac_ces(sched_interface::dl_sched_data_t* data, uint32_t total_tbs, uint32_t ue_cc_idx);
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std::pair<int, int> allocate_new_dl_mac_pdu(sched_interface::dl_sched_data_t* data,
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dl_harq_proc* h,
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const rbgmask_t& user_mask,
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uint32_t tti_tx_dl,
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uint32_t ue_cc_idx,
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uint32_t cfi,
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uint32_t tb,
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const char* dci_format);
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std::pair<int, int> compute_mcs_and_tbs(uint32_t ue_cc_idx,
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uint32_t tti_tx_dl,
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uint32_t nof_alloc_prbs,
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uint32_t cfi,
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const srslte_dci_dl_t& dci);
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static bool bearer_is_ul(const ue_bearer_t* lch);
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static bool bearer_is_dl(const ue_bearer_t* lch);
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uint32_t get_pending_ul_old_data_unlocked(uint32_t cc_idx);
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uint32_t get_pending_ul_new_data_unlocked(uint32_t tti);
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bool needs_cqi_unlocked(uint32_t tti, uint32_t cc_idx, bool will_send = false);
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int generate_format1(uint32_t pid,
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sched_interface::dl_sched_data_t* data,
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uint32_t tti,
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uint32_t cc_idx,
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uint32_t cfi,
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const rbgmask_t& user_mask);
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int generate_format2a(uint32_t pid,
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sched_interface::dl_sched_data_t* data,
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uint32_t tti,
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uint32_t cc_idx,
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uint32_t cfi,
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const rbgmask_t& user_mask);
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int generate_format2(uint32_t pid,
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sched_interface::dl_sched_data_t* data,
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uint32_t tti,
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uint32_t cc_idx,
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uint32_t cfi,
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const rbgmask_t& user_mask);
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/* Args */
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sched_interface::ue_cfg_t cfg = {};
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srslte_cell_t cell = {};
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srslte::log_ref log_h;
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const std::vector<sched_cell_params_t>* cell_params_list = nullptr;
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const sched_cell_params_t* main_cc_params = nullptr;
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/* Buffer states */
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bool sr = false;
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std::array<ue_bearer_t, sched_interface::MAX_LC> lch = {};
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int power_headroom = 0;
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uint32_t cqi_request_tti = 0;
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uint16_t rnti = 0;
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uint32_t max_msg3retx = 0;
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/* User State */
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int next_tpc_pusch = 0;
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int next_tpc_pucch = 0;
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bool phy_config_dedicated_enabled = false;
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std::vector<cc_sched_ue> carriers; ///< map of UE CellIndex to carrier configuration
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// Control Element Command queue
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using ce_cmd = srslte::dl_sch_lcid;
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std::deque<ce_cmd> pending_ces;
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};
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} // namespace srsenb
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#endif // SRSENB_SCHEDULER_UE_H
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