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143 lines
4.1 KiB
C++
143 lines
4.1 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_DL_HARQ_H
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#define SRSUE_DL_HARQ_H
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#include "demux.h"
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#include "dl_sps.h"
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#include "srsran/common/mac_pcap.h"
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#include "srsran/common/timers.h"
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#include "srsue/hdr/stack/mac_common/mac_common.h"
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/* Downlink HARQ entity as defined in 5.3.2 of 36.321 */
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namespace srsue {
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class dl_harq_entity
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{
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public:
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dl_harq_entity(uint8_t cc_idx_);
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bool init(ue_rnti* rntis, demux* demux_unit);
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void reset();
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void start_pcap(srsran::mac_pcap* pcap_);
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/***************** PHY->MAC interface for DL processes **************************/
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void new_grant_dl(mac_interface_phy_lte::mac_grant_dl_t grant, mac_interface_phy_lte::tb_action_dl_t* action);
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void tb_decoded(mac_interface_phy_lte::mac_grant_dl_t grant, bool ack[SRSRAN_MAX_CODEWORDS]);
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void set_si_window_start(int si_window_start);
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float get_average_retx();
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void set_average_retx(uint32_t n_retx);
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private:
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class dl_harq_process
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{
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public:
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dl_harq_process();
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bool init(int pid, dl_harq_entity* parent);
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void reset(void);
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void reset_ndi();
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void new_grant_dl(mac_interface_phy_lte::mac_grant_dl_t grant, mac_interface_phy_lte::tb_action_dl_t* action);
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void tb_decoded(mac_interface_phy_lte::mac_grant_dl_t grant, bool ack[SRSRAN_MAX_CODEWORDS]);
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bool is_sps();
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private:
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const static int RESET_DUPLICATE_TIMEOUT = 6;
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class dl_tb_process
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{
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public:
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dl_tb_process(void);
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~dl_tb_process();
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bool init(int pid, dl_harq_entity* parent, uint32_t tb_idx);
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void reset();
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void reset_ndi();
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void new_grant_dl(mac_interface_phy_lte::mac_grant_dl_t grant, mac_interface_phy_lte::tb_action_dl_t* action);
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void tb_decoded(mac_interface_phy_lte::mac_grant_dl_t grant, bool* ack_ptr);
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private:
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// Determine if it's a new transmission 5.3.2.2
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bool calc_is_new_transmission(mac_interface_phy_lte::mac_grant_dl_t grant);
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// Internal function to reset process, caller must hold the mutex
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void reset_nolock();
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std::mutex mutex;
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bool is_initiated;
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dl_harq_entity* harq_entity;
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srslog::basic_logger& logger;
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bool is_first_tb;
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bool is_new_transmission;
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bool is_bcch;
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uint32_t pid; /* HARQ Proccess ID */
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uint32_t tid; /* Transport block ID */
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uint8_t* payload_buffer_ptr;
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bool ack;
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uint32_t n_retx;
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mac_interface_phy_lte::mac_grant_dl_t cur_grant;
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srsran_softbuffer_rx_t softbuffer;
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};
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/* Transport blocks */
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std::vector<dl_tb_process> subproc;
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};
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// Private members of dl_harq_entity
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uint32_t get_harq_sps_pid(uint32_t tti);
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dl_sps dl_sps_assig;
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std::vector<dl_harq_process> proc;
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dl_harq_process bcch_proc;
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demux* demux_unit = nullptr;
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srslog::basic_logger& logger;
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srsran::mac_pcap* pcap = nullptr;
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ue_rnti* rntis = nullptr;
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uint16_t last_temporal_crnti = 0;
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int si_window_start = 0;
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std::mutex retx_cnt_mutex = {};
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float average_retx = 0.0;
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uint64_t nof_pkts = 0;
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uint8_t cc_idx = 0;
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};
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typedef std::unique_ptr<dl_harq_entity> dl_harq_entity_ptr;
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typedef std::array<dl_harq_entity_ptr, SRSRAN_MAX_CARRIERS> dl_harq_entity_vector;
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} // namespace srsue
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#endif // SRSUE_DL_HARQ_H
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