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126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
/**
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN 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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* srsRAN 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 SRSUE_PROC_BSR_H
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#define SRSUE_PROC_BSR_H
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#include <map>
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#include <stdint.h>
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#include "proc_sr.h"
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#include "srsran/common/task_scheduler.h"
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#include "srsran/srslog/srslog.h"
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#include "srsue/hdr/stack/mac_common/mac_common.h"
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/* Buffer status report procedure */
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namespace srsue {
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class rlc_interface_mac;
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// BSR interface for MUX
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class bsr_interface_mux
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{
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public:
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typedef enum { LONG_BSR, SHORT_BSR, TRUNC_BSR } bsr_format_t;
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typedef struct {
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bsr_format_t format;
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uint32_t buff_size[4];
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} bsr_t;
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/* MUX calls BSR to check if it should send (and can fit) a BSR into PDU */
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virtual bool need_to_send_bsr_on_ul_grant(uint32_t grant_size, uint32_t total_data, bsr_t* bsr) = 0;
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/* MUX calls BSR to let it generate a padding BSR if there is space in PDU */
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virtual bool generate_padding_bsr(uint32_t nof_padding_bytes, bsr_t* bsr) = 0;
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/* MUX calls BSR to update buffer state of each LCG after all PDUs for this TTI have been packed */
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virtual void update_bsr_tti_end(const bsr_t* bsr) = 0;
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};
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class bsr_proc : public srsran::timer_callback, public bsr_interface_mux
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{
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public:
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explicit bsr_proc(srslog::basic_logger& logger) : logger(logger) {}
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void init(sr_proc* sr_proc, rlc_interface_mac* rlc, srsran::ext_task_sched_handle* task_sched_);
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void step(uint32_t tti);
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void reset();
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void set_config(srsran::bsr_cfg_t& bsr_cfg);
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void setup_lcid(uint32_t lcid, uint32_t lcg, uint32_t priority);
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void timer_expired(uint32_t timer_id);
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uint32_t get_buffer_state();
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bool need_to_send_bsr_on_ul_grant(uint32_t grant_size, uint32_t total_data, bsr_t* bsr);
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bool generate_padding_bsr(uint32_t nof_padding_bytes, bsr_t* bsr);
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void update_bsr_tti_end(const bsr_t* bsr);
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private:
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const static int QUEUE_STATUS_PERIOD_MS = 1000;
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std::mutex mutex;
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srsran::ext_task_sched_handle* task_sched = nullptr;
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srslog::basic_logger& logger;
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rlc_interface_mac* rlc = nullptr;
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sr_proc* sr = nullptr;
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srsran::bsr_cfg_t bsr_cfg;
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bool initiated = false;
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const static int NOF_LCG = 4;
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typedef struct {
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int priority;
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uint32_t old_buffer;
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uint32_t new_buffer;
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} lcid_t;
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std::map<uint32_t, lcid_t> lcgs[NOF_LCG]; // groups LCID in LCG
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mac_buffer_states_t old_buffer_state;
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uint32_t find_max_priority_lcg_with_data();
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bsr_trigger_type_t triggered_bsr_type = NONE;
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void print_state();
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void set_trigger(bsr_trigger_type_t new_trigger);
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void update_new_data();
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void update_old_buffer();
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bool check_highest_channel();
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bool check_new_data();
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bool check_any_channel();
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uint32_t get_buffer_state_lcg(uint32_t lcg);
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bool generate_bsr(bsr_t* bsr, uint32_t nof_padding_bytes);
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char* bsr_type_tostring(bsr_trigger_type_t type);
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char* bsr_format_tostring(bsr_format_t format);
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srsran::timer_handler::unique_timer timer_periodic;
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srsran::timer_handler::unique_timer timer_retx;
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srsran::timer_handler::unique_timer timer_queue_status_print;
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};
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} // namespace srsue
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#endif // SRSUE_PROC_BSR_H
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