mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
272 lines
10 KiB
C++
272 lines
10 KiB
C++
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2020 Software Radio Systems Limited
|
|
*
|
|
* By using this file, you agree to the terms and conditions set
|
|
* forth in the LICENSE file which can be found at the top level of
|
|
* the distribution.
|
|
*
|
|
*/
|
|
|
|
#ifndef SRSLTE_SCHED_GRID_H
|
|
#define SRSLTE_SCHED_GRID_H
|
|
|
|
#include "lib/include/srslte/interfaces/sched_interface.h"
|
|
#include "sched_phy_ch/sf_cch_allocator.h"
|
|
#include "sched_ue.h"
|
|
#include "srslte/adt/bounded_bitset.h"
|
|
#include "srslte/common/log.h"
|
|
#include "srslte/srslog/srslog.h"
|
|
#include <deque>
|
|
#include <vector>
|
|
|
|
namespace srsenb {
|
|
|
|
/// Error code of alloc attempt
|
|
struct alloc_outcome_t {
|
|
enum result_enum {
|
|
SUCCESS,
|
|
DCI_COLLISION,
|
|
RB_COLLISION,
|
|
ERROR,
|
|
NOF_RB_INVALID,
|
|
PUCCH_COLLISION,
|
|
MEASGAP_COLLISION,
|
|
ALREADY_ALLOC,
|
|
NO_DATA,
|
|
INVALID_PRBMASK,
|
|
INVALID_CARRIER
|
|
};
|
|
result_enum result = ERROR;
|
|
alloc_outcome_t() = default;
|
|
alloc_outcome_t(result_enum e) : result(e) {}
|
|
operator result_enum() { return result; }
|
|
operator bool() { return result == SUCCESS; }
|
|
const char* to_string() const;
|
|
};
|
|
|
|
//! Result of a Subframe sched computation
|
|
struct cc_sched_result {
|
|
tti_point tti_rx;
|
|
sched_interface::dl_sched_res_t dl_sched_result = {};
|
|
sched_interface::ul_sched_res_t ul_sched_result = {};
|
|
rbgmask_t dl_mask = {}; ///< Accumulation of all DL RBG allocations
|
|
prbmask_t ul_mask = {}; ///< Accumulation of all UL PRB allocations
|
|
pdcch_mask_t pdcch_mask = {}; ///< Accumulation of all CCE allocations
|
|
|
|
bool is_generated(tti_point tti_rx_) const { return tti_rx == tti_rx_; }
|
|
};
|
|
|
|
struct sf_sched_result {
|
|
srslte::tti_point tti_rx;
|
|
std::vector<cc_sched_result> enb_cc_list;
|
|
|
|
cc_sched_result* new_cc(uint32_t enb_cc_idx);
|
|
const cc_sched_result* get_cc(uint32_t enb_cc_idx) const
|
|
{
|
|
return enb_cc_idx < enb_cc_list.size() ? &enb_cc_list[enb_cc_idx] : nullptr;
|
|
}
|
|
cc_sched_result* get_cc(uint32_t enb_cc_idx)
|
|
{
|
|
return enb_cc_idx < enb_cc_list.size() ? &enb_cc_list[enb_cc_idx] : nullptr;
|
|
}
|
|
bool is_ul_alloc(uint16_t rnti) const;
|
|
bool is_dl_alloc(uint16_t rnti) const;
|
|
};
|
|
|
|
struct sched_result_list {
|
|
public:
|
|
sf_sched_result* new_tti(srslte::tti_point tti_rx);
|
|
sf_sched_result* get_sf(srslte::tti_point tti_rx);
|
|
const sf_sched_result* get_sf(srslte::tti_point tti_rx) const;
|
|
const cc_sched_result* get_cc(srslte::tti_point tti_rx, uint32_t enb_cc_idx) const;
|
|
cc_sched_result* get_cc(srslte::tti_point tti_rx, uint32_t enb_cc_idx);
|
|
|
|
private:
|
|
std::array<sf_sched_result, TTIMOD_SZ> results;
|
|
};
|
|
|
|
/// manages a subframe grid resources, namely CCE and DL/UL RB allocations
|
|
class sf_grid_t
|
|
{
|
|
public:
|
|
struct dl_ctrl_alloc_t {
|
|
alloc_outcome_t outcome;
|
|
rbg_interval rbg_range;
|
|
};
|
|
|
|
sf_grid_t() : logger(srslog::fetch_basic_logger("MAC")) {}
|
|
|
|
void init(const sched_cell_params_t& cell_params_);
|
|
void new_tti(tti_point tti_rx);
|
|
dl_ctrl_alloc_t alloc_dl_ctrl(uint32_t aggr_lvl, alloc_type_t alloc_type);
|
|
alloc_outcome_t alloc_dl_data(sched_ue* user, const rbgmask_t& user_mask, bool has_pusch_grant);
|
|
bool reserve_dl_rbgs(uint32_t start_rbg, uint32_t end_rbg);
|
|
alloc_outcome_t alloc_ul_data(sched_ue* user, prb_interval alloc, bool needs_pdcch, bool strict = true);
|
|
alloc_outcome_t reserve_ul_prbs(const prbmask_t& prbmask, bool strict);
|
|
alloc_outcome_t reserve_ul_prbs(prb_interval alloc, bool strict);
|
|
bool find_ul_alloc(uint32_t L, prb_interval* alloc) const;
|
|
|
|
// getters
|
|
const rbgmask_t& get_dl_mask() const { return dl_mask; }
|
|
const prbmask_t& get_ul_mask() const { return ul_mask; }
|
|
uint32_t get_cfi() const { return pdcch_alloc.get_cfi(); }
|
|
const sf_cch_allocator& get_pdcch_grid() const { return pdcch_alloc; }
|
|
uint32_t get_pucch_width() const { return pucch_nrb; }
|
|
|
|
private:
|
|
alloc_outcome_t alloc_dl(uint32_t aggr_lvl,
|
|
alloc_type_t alloc_type,
|
|
rbgmask_t alloc_mask,
|
|
sched_ue* user = nullptr,
|
|
bool has_pusch_grant = false);
|
|
|
|
// consts
|
|
const sched_cell_params_t* cc_cfg = nullptr;
|
|
srslog::basic_logger& logger;
|
|
uint32_t nof_rbgs = 0;
|
|
uint32_t si_n_rbg = 0, rar_n_rbg = 0;
|
|
uint32_t pucch_nrb = 0;
|
|
prbmask_t pucch_mask;
|
|
|
|
// derived
|
|
sf_cch_allocator pdcch_alloc = {};
|
|
|
|
// internal state
|
|
tti_point tti_rx;
|
|
uint32_t avail_rbg = 0;
|
|
rbgmask_t dl_mask = {};
|
|
prbmask_t ul_mask = {};
|
|
};
|
|
|
|
/** Description: Stores the RAR, broadcast, paging, DL data, UL data allocations for the given subframe
|
|
* Converts the stored allocations' metadata to the scheduler DL/UL result
|
|
* Handles the generation of DCI formats
|
|
*/
|
|
class sf_sched
|
|
{
|
|
public:
|
|
struct ctrl_alloc_t {
|
|
size_t dci_idx;
|
|
rbg_interval rbg_range;
|
|
uint16_t rnti;
|
|
uint32_t req_bytes;
|
|
alloc_type_t alloc_type;
|
|
};
|
|
struct rar_alloc_t {
|
|
sf_sched::ctrl_alloc_t alloc_data;
|
|
sched_interface::dl_sched_rar_t rar_grant;
|
|
rar_alloc_t(const sf_sched::ctrl_alloc_t& c, const sched_interface::dl_sched_rar_t& r) : alloc_data(c), rar_grant(r)
|
|
{}
|
|
};
|
|
struct bc_alloc_t : public ctrl_alloc_t {
|
|
uint32_t rv = 0;
|
|
uint32_t sib_idx = 0;
|
|
bc_alloc_t() = default;
|
|
explicit bc_alloc_t(const ctrl_alloc_t& c) : ctrl_alloc_t(c) {}
|
|
};
|
|
struct dl_alloc_t {
|
|
size_t dci_idx;
|
|
uint16_t rnti;
|
|
rbgmask_t user_mask;
|
|
uint32_t pid;
|
|
};
|
|
struct ul_alloc_t {
|
|
enum type_t { NEWTX, NOADAPT_RETX, ADAPT_RETX };
|
|
bool is_msg3 = false;
|
|
size_t dci_idx;
|
|
type_t type;
|
|
uint16_t rnti;
|
|
prb_interval alloc;
|
|
int msg3_mcs = -1;
|
|
bool is_retx() const { return type == NOADAPT_RETX or type == ADAPT_RETX; }
|
|
bool needs_pdcch() const { return (type == NEWTX and not is_msg3) or type == ADAPT_RETX; }
|
|
};
|
|
struct pending_msg3_t {
|
|
uint16_t rnti = 0;
|
|
uint32_t L = 0;
|
|
uint32_t n_prb = 0;
|
|
uint32_t mcs = 0;
|
|
};
|
|
struct pending_rar_t {
|
|
uint16_t ra_rnti = 0;
|
|
tti_point prach_tti{};
|
|
uint32_t nof_grants = 0;
|
|
sched_interface::dl_sched_rar_info_t msg3_grant[sched_interface::MAX_RAR_LIST] = {};
|
|
};
|
|
typedef std::pair<alloc_outcome_t, const ctrl_alloc_t> ctrl_code_t;
|
|
|
|
// Control/Configuration Methods
|
|
sf_sched();
|
|
void init(const sched_cell_params_t& cell_params_);
|
|
void new_tti(srslte::tti_point tti_rx_, sf_sched_result* cc_results);
|
|
|
|
// DL alloc methods
|
|
alloc_outcome_t alloc_bc(uint32_t aggr_lvl, uint32_t sib_idx, uint32_t sib_ntx);
|
|
alloc_outcome_t alloc_paging(uint32_t aggr_lvl, uint32_t paging_payload);
|
|
std::pair<alloc_outcome_t, uint32_t> alloc_rar(uint32_t aggr_lvl, const pending_rar_t& rar_grant);
|
|
bool reserve_dl_rbgs(uint32_t rbg_start, uint32_t rbg_end) { return tti_alloc.reserve_dl_rbgs(rbg_start, rbg_end); }
|
|
const std::vector<rar_alloc_t>& get_allocated_rars() const { return rar_allocs; }
|
|
|
|
// UL alloc methods
|
|
alloc_outcome_t alloc_msg3(sched_ue* user, const sched_interface::dl_sched_rar_grant_t& rargrant);
|
|
alloc_outcome_t
|
|
alloc_ul(sched_ue* user, prb_interval alloc, ul_alloc_t::type_t alloc_type, bool is_msg3 = false, int msg3_mcs = -1);
|
|
bool reserve_ul_prbs(const prbmask_t& ulmask, bool strict) { return tti_alloc.reserve_ul_prbs(ulmask, strict); }
|
|
bool alloc_phich(sched_ue* user, sched_interface::ul_sched_res_t* ul_sf_result);
|
|
|
|
// compute DCIs and generate dl_sched_result/ul_sched_result for a given TTI
|
|
void generate_sched_results(sched_ue_list& ue_db);
|
|
|
|
alloc_outcome_t alloc_dl_user(sched_ue* user, const rbgmask_t& user_mask, uint32_t pid);
|
|
tti_point get_tti_tx_dl() const { return to_tx_dl(tti_rx); }
|
|
uint32_t get_nof_ctrl_symbols() const;
|
|
const rbgmask_t& get_dl_mask() const { return tti_alloc.get_dl_mask(); }
|
|
alloc_outcome_t alloc_ul_user(sched_ue* user, prb_interval alloc);
|
|
const prbmask_t& get_ul_mask() const { return tti_alloc.get_ul_mask(); }
|
|
tti_point get_tti_tx_ul() const { return to_tx_ul(tti_rx); }
|
|
|
|
// getters
|
|
tti_point get_tti_rx() const { return tti_rx; }
|
|
bool is_dl_alloc(uint16_t rnti) const;
|
|
bool is_ul_alloc(uint16_t rnti) const;
|
|
uint32_t get_enb_cc_idx() const { return cc_cfg->enb_cc_idx; }
|
|
const sched_cell_params_t* get_cc_cfg() const { return cc_cfg; }
|
|
|
|
private:
|
|
ctrl_code_t alloc_dl_ctrl(uint32_t aggr_lvl, uint32_t tbs_bytes, uint16_t rnti);
|
|
int generate_format1a(prb_interval prb_range, uint32_t tbs, uint32_t rv, uint16_t rnti, srslte_dci_dl_t* dci);
|
|
void set_bc_sched_result(const sf_cch_allocator::alloc_result_t& dci_result,
|
|
sched_interface::dl_sched_res_t* dl_result);
|
|
void set_rar_sched_result(const sf_cch_allocator::alloc_result_t& dci_result,
|
|
sched_interface::dl_sched_res_t* dl_result);
|
|
void set_dl_data_sched_result(const sf_cch_allocator::alloc_result_t& dci_result,
|
|
sched_interface::dl_sched_res_t* dl_result,
|
|
sched_ue_list& ue_list);
|
|
void set_ul_sched_result(const sf_cch_allocator::alloc_result_t& dci_result,
|
|
sched_interface::ul_sched_res_t* ul_result,
|
|
sched_ue_list& ue_list);
|
|
|
|
// consts
|
|
const sched_cell_params_t* cc_cfg = nullptr;
|
|
srslog::basic_logger& logger;
|
|
sf_sched_result* cc_results; ///< Results of other CCs for the same Subframe
|
|
|
|
// internal state
|
|
sf_grid_t tti_alloc;
|
|
std::vector<bc_alloc_t> bc_allocs;
|
|
std::vector<rar_alloc_t> rar_allocs;
|
|
std::vector<dl_alloc_t> data_allocs;
|
|
std::vector<ul_alloc_t> ul_data_allocs;
|
|
uint32_t last_msg3_prb = 0, max_msg3_prb = 0;
|
|
|
|
// Next TTI state
|
|
tti_point tti_rx;
|
|
};
|
|
|
|
} // namespace srsenb
|
|
|
|
#endif // SRSLTE_SCHED_GRID_H
|