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96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
4 years ago
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/*
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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 SRSLTE_SCHED_LCH_H
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#define SRSLTE_SCHED_LCH_H
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#include "srslte/common/logmap.h"
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#include "srslte/interfaces/sched_interface.h"
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#include "srslte/mac/pdu.h"
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namespace srsenb {
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class lch_manager
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{
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constexpr static uint32_t pbr_infinity = -1;
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constexpr static uint32_t MAX_LC = sched_interface::MAX_LC;
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public:
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void set_cfg(const sched_interface::ue_cfg_t& cfg_);
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void new_tti();
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void config_lcid(uint32_t lcg_id, const sched_interface::ue_bearer_cfg_t& bearer_cfg);
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void ul_bsr(uint8_t lcg_id, uint32_t bsr);
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void ul_buffer_add(uint8_t lcid, uint32_t bytes);
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void dl_buffer_state(uint8_t lcid, uint32_t tx_queue, uint32_t retx_queue);
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int alloc_rlc_pdu(sched_interface::dl_sched_pdu_t* lcid, int rem_bytes);
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bool is_bearer_active(uint32_t lcid) const;
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bool is_bearer_ul(uint32_t lcid) const;
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bool is_bearer_dl(uint32_t lcid) const;
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int get_dl_tx_total() const;
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int get_dl_tx_total(uint32_t lcid) const { return get_dl_tx(lcid) + get_dl_retx(lcid); }
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int get_dl_tx(uint32_t lcid) const;
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int get_dl_retx(uint32_t lcid) const;
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int get_bsr(uint32_t lcid) const;
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int get_bsr_with_overhead(uint32_t lcid) const;
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int get_max_prio_lcid() const;
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std::string get_bsr_text() const;
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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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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 bucket_size = 0;
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int buf_tx = 0;
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int buf_retx = 0;
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int Bj = 0;
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};
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int alloc_retx_bytes(uint8_t lcid, int rem_bytes);
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int alloc_tx_bytes(uint8_t lcid, int rem_bytes);
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size_t prio_idx = 0;
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srslte::log_ref log_h{"MAC"};
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std::array<ue_bearer_t, sched_interface::MAX_LC> lch = {};
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std::array<int, 4> lcg_bsr = {};
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};
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/**
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* Allocate space for multiple MAC SDUs (i.e. RLC PDUs) and corresponding MAC SDU subheaders
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* @param data struct where the rlc pdu allocations are stored
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* @param total_tbs available TB size for allocations for a single UE
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* @param tbidx index of TB
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* @return allocated bytes, which is always equal or lower than total_tbs
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*/
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uint32_t
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allocate_mac_sdus(sched_interface::dl_sched_data_t* data, lch_manager& lch_handler, uint32_t total_tbs, uint32_t tbidx);
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} // namespace srsenb
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#endif // SRSLTE_SCHED_LCH_H
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