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srsRAN_4G/srsenb/hdr/stack/mac/scheduler_ue.h

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/*
* Copyright 2013-2019 Software Radio Systems Limited
*
* This file is part of srsLTE.
*
* srsLTE is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* srsLTE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* A copy of the GNU Affero General Public License can be found in
* the LICENSE file in the top-level directory of this distribution
* and at http://www.gnu.org/licenses/.
*
*/
#ifndef SRSENB_SCHEDULER_UE_H
#define SRSENB_SCHEDULER_UE_H
#include "srslte/common/log.h"
#include "srslte/interfaces/sched_interface.h"
#include <map>
#include <vector>
#include "scheduler_harq.h"
#include <deque>
#include <mutex>
namespace srsenb {
class sched_cell_params_t;
struct tti_params_t;
struct sched_dci_cce_t {
uint32_t cce_start[4][6];
uint32_t nof_loc[4];
};
struct sched_ue_carrier {
const static int SCHED_MAX_HARQ_PROC = SRSLTE_FDD_NOF_HARQ;
sched_ue_carrier(const sched_interface::ue_cfg_t& cfg_,
const sched_cell_params_t& cell_cfg_,
uint16_t rnti_,
uint32_t ue_cc_idx);
void reset();
void set_cfg(const sched_interface::ue_cfg_t& cfg); ///< reconfigure ue carrier
// Harq access
void reset_old_pending_pids(uint32_t tti_rx);
dl_harq_proc* get_pending_dl_harq(uint32_t tti_tx_dl);
dl_harq_proc* get_empty_dl_harq();
int set_ack_info(uint32_t tti_rx, uint32_t tb_idx, bool ack);
ul_harq_proc* get_ul_harq(uint32_t tti);
uint32_t get_pending_ul_old_data();
uint32_t get_aggr_level(uint32_t nof_bits);
int alloc_tbs(uint32_t nof_prb, uint32_t nof_re, uint32_t req_bytes, bool is_ul, int* mcs);
int alloc_tbs_dl(uint32_t nof_prb, uint32_t nof_re, uint32_t req_bytes, int* mcs);
int alloc_tbs_ul(uint32_t nof_prb, uint32_t nof_re, uint32_t req_bytes, int* mcs);
uint32_t get_required_prb_ul(uint32_t req_bytes);
const sched_cell_params_t* get_cell_cfg() const { return cell_params; }
bool is_active() const { return active; }
uint32_t get_ue_cc_idx() const { return ue_cc_idx; }
std::array<dl_harq_proc, SCHED_MAX_HARQ_PROC> dl_harq = {};
std::array<ul_harq_proc, SCHED_MAX_HARQ_PROC> ul_harq = {};
uint32_t dl_ri = 0;
uint32_t dl_ri_tti = 0;
uint32_t dl_pmi = 0;
uint32_t dl_pmi_tti = 0;
uint32_t dl_cqi = 1;
uint32_t dl_cqi_tti = 0;
uint32_t ul_cqi = 1;
uint32_t ul_cqi_tti = 0;
int max_mcs_dl = 28, max_mcs_ul = 28;
uint32_t max_aggr_level = 3;
int fixed_mcs_ul = 0, fixed_mcs_dl = 0;
// Allowed DCI locations per per CFI and per subframe
std::array<std::array<sched_dci_cce_t, 10>, 3> dci_locations = {};
private:
// config
srslte::log* log_h = nullptr;
const sched_interface::ue_cfg_t* cfg = nullptr;
const sched_cell_params_t* cell_params = nullptr;
uint16_t rnti;
uint32_t ue_cc_idx = 0;
// state
bool active = false;
};
/** This class is designed to be thread-safe because it is called from workers through scheduler thread and from
* higher layers and mac threads.
*
* 1 mutex is created for every user and only access to same user variables are mutexed
*/
class sched_ue
{
public:
/*************************************************************
*
* FAPI-like Interface
*
************************************************************/
sched_ue();
void reset();
void phy_config_enabled(uint32_t tti, bool enabled);
void init(uint16_t rnti, const std::vector<sched_cell_params_t>& cell_list_params_);
void set_cfg(const sched_interface::ue_cfg_t& cfg);
void set_bearer_cfg(uint32_t lc_id, srsenb::sched_interface::ue_bearer_cfg_t* cfg);
void rem_bearer(uint32_t lc_id);
void dl_buffer_state(uint8_t lc_id, uint32_t tx_queue, uint32_t retx_queue);
void ul_buffer_state(uint8_t lc_id, uint32_t bsr, bool set_value = true);
void ul_phr(int phr);
void mac_buffer_state(uint32_t ce_code);
void ul_recv_len(uint32_t lcid, uint32_t len);
void set_dl_ant_info(const sched_interface::ant_info_ded_t& dedicated);
void set_ul_cqi(uint32_t tti, uint32_t cc_idx, uint32_t cqi, uint32_t ul_ch_code);
void set_dl_ri(uint32_t tti, uint32_t cc_idx, uint32_t ri);
void set_dl_pmi(uint32_t tti, uint32_t cc_idx, uint32_t ri);
void set_dl_cqi(uint32_t tti, uint32_t cc_idx, uint32_t cqi);
int set_ack_info(uint32_t tti, uint32_t cc_idx, uint32_t tb_idx, bool ack);
void set_ul_crc(uint32_t tti, uint32_t cc_idx, bool crc_res);
/*******************************************************
* Custom functions
*******************************************************/
void tpc_inc();
void tpc_dec();
dl_harq_proc* find_dl_harq(uint32_t tti_rx, uint32_t cc_idx);
dl_harq_proc* get_dl_harq(uint32_t idx, uint32_t cc_idx);
uint16_t get_rnti() const { return rnti; }
std::pair<bool, uint32_t> get_cell_index(uint32_t enb_cc_idx) const;
const sched_interface::ue_cfg_t& get_ue_cfg() const { return cfg; }
/*******************************************************
* Functions used by scheduler metric objects
*******************************************************/
uint32_t get_required_prb_dl(uint32_t cc_idx, uint32_t req_bytes, uint32_t nof_ctrl_symbols);
uint32_t get_required_prb_ul(uint32_t cc_idx, uint32_t req_bytes);
uint32_t get_pending_dl_new_data();
uint32_t get_pending_ul_new_data(uint32_t tti);
uint32_t get_pending_ul_old_data(uint32_t cc_idx);
uint32_t get_pending_dl_new_data_total();
void reset_pending_pids(uint32_t tti_rx, uint32_t cc_idx);
dl_harq_proc* get_pending_dl_harq(uint32_t tti, uint32_t cc_idx);
dl_harq_proc* get_empty_dl_harq(uint32_t cc_idx);
ul_harq_proc* get_ul_harq(uint32_t tti, uint32_t cc_idx);
/*******************************************************
* Functions used by the scheduler carrier object
*******************************************************/
void finish_tti(const tti_params_t& tti_params, uint32_t enb_cc_idx);
/*******************************************************
* Functions used by the scheduler object
*******************************************************/
void set_sr();
void unset_sr();
void set_needs_ta_cmd(uint32_t nof_ta_cmd);
int generate_format1(dl_harq_proc* h,
sched_interface::dl_sched_data_t* data,
uint32_t tti,
uint32_t cc_idx,
uint32_t cfi,
const rbgmask_t& user_mask);
int generate_format2a(dl_harq_proc* h,
sched_interface::dl_sched_data_t* data,
uint32_t tti,
uint32_t cc_idx,
uint32_t cfi,
const rbgmask_t& user_mask);
int generate_format2(dl_harq_proc* h,
sched_interface::dl_sched_data_t* data,
uint32_t tti,
uint32_t cc_idx,
uint32_t cfi,
const rbgmask_t& user_mask);
int generate_format0(sched_interface::ul_sched_data_t* data,
uint32_t tti,
uint32_t cc_idx,
ul_harq_proc::ul_alloc_t alloc,
bool needs_pdcch,
srslte_dci_location_t cce_range,
int explicit_mcs = -1);
srslte_dci_format_t get_dci_format();
sched_dci_cce_t* get_locations(uint32_t enb_cc_idx, uint32_t current_cfi, uint32_t sf_idx);
sched_ue_carrier* get_ue_carrier(uint32_t enb_cc_idx);
bool needs_cqi(uint32_t tti, uint32_t cc_idx, bool will_send = false);
uint32_t get_max_retx();
bool pucch_sr_collision(uint32_t current_tti, uint32_t n_cce);
static int cqi_to_tbs(uint32_t cqi,
uint32_t nof_prb,
uint32_t nof_re,
uint32_t max_mcs,
uint32_t max_Qm,
bool is_ul,
uint32_t* mcs);
private:
struct ue_bearer_t {
sched_interface::ue_bearer_cfg_t cfg = {};
int buf_tx = 0;
int buf_retx = 0;
int bsr = 0;
};
void set_bearer_cfg_unlocked(uint32_t lc_id, const sched_interface::ue_bearer_cfg_t& cfg_);
bool is_sr_triggered();
uint32_t format1_count_prb(const rbgmask_t& bitmask, uint32_t cc_idx);
int alloc_rlc_pdu(sched_interface::dl_sched_pdu_t* mac_sdu, int rem_tbs);
uint32_t allocate_mac_sdus(sched_interface::dl_sched_data_t* data, uint32_t total_tbs);
static bool bearer_is_ul(ue_bearer_t* lch);
static bool bearer_is_dl(const ue_bearer_t* lch);
uint32_t get_pending_dl_new_data_unlocked();
uint32_t get_pending_ul_old_data_unlocked(uint32_t cc_idx);
uint32_t get_pending_ul_new_data_unlocked(uint32_t tti);
uint32_t get_pending_dl_new_data_total_unlocked();
bool is_conres_ce_pending() const;
bool needs_cqi_unlocked(uint32_t tti, uint32_t cc_idx, bool will_send = false);
int generate_format2a_unlocked(dl_harq_proc* h,
sched_interface::dl_sched_data_t* data,
uint32_t tti,
uint32_t cc_idx,
uint32_t cfi,
const rbgmask_t& user_mask);
bool is_first_dl_tx();
/* Args */
sched_interface::ue_cfg_t cfg = {};
srslte_cell_t cell = {};
srslte::log* log_h = nullptr;
const std::vector<sched_cell_params_t>* cell_params_list = nullptr;
const sched_cell_params_t* main_cc_params = nullptr;
std::mutex mutex;
/* Buffer states */
bool sr = false;
int buf_mac = 0;
int buf_ul = 0;
std::array<ue_bearer_t, sched_interface::MAX_LC> lch = {};
int power_headroom = 0;
uint32_t cqi_request_tti = 0;
uint16_t rnti = 0;
uint32_t max_msg3retx = 0;
/* User State */
bool conres_ce_pending = true;
int next_tpc_pusch = 0;
int next_tpc_pucch = 0;
bool phy_config_dedicated_enabled = false;
sched_interface::ant_info_ded_t dl_ant_info;
std::vector<sched_ue_carrier> carriers; ///< map of UE CellIndex to carrier configuration
// Control Element Command queue
struct ce_cmd {
int cetype = 0;
explicit ce_cmd(int lcid) : cetype(lcid) {}
int get_sdu_size(const sched_interface::ue_cfg_t& c) const;
// considers both MAC CE and subheader
int get_req_bytes(const sched_interface::ue_cfg_t& c) const;
std::string to_string() const;
};
std::deque<ce_cmd> pending_ces;
};
} // namespace srsenb
#endif // SRSENB_SCHEDULER_UE_H
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