The PHY component. More...

#include <Phy.h>

Collaboration diagram for Phy:

Classes
struct	mch_info_t

struct	mtch_info_t

Public Types
enum class	SubcarrierSpacing { df_15kHz , df_7kHz5 , df_1kHz25 }

typedef std::function< int(cf_t data[SRSRAN_MAX_CHANNELS], uint32_t nsamples, srsran_timestamp_t rx_time)>	get_samples_t
	Definition of the callback function used to fetch samples from the SDR. More...

Public Member Functions
	Phy (const libconfig::Config &cfg, get_samples_t cb, uint8_t cs_nof_prb, int8_t override_nof_prb, uint8_t rx_channels)
	Default constructor. More...

virtual	~Phy ()
	Default destructor. More...

bool	init ()
	Initialize the underlying components. More...

bool	cell_search ()
	Search for a cell. More...

bool	synchronize_subframe ()
	Synchronizes PSS/SSS and tries to deocode the MIB. More...

bool	get_next_frame (cf_t **buffer, uint32_t size)
	Get the sample data for the next subframe. More...

srsran_cell_t	cell ()
	Get the current cell (with params adjusted for MBSFN) More...

unsigned	nr_prb ()
	Get the current number of PRB. More...

uint32_t	tti ()
	Get the current subframe TTI. More...

float	cfo ()
	Get the current CFO value. More...

void	set_cfo_from_channel_estimation (float cfo)
	Set the CFO value from channel estimation. More...

void	set_mch_scheduling_info (const srsran::sib13_t &sib13)
	Set the values received in SIB13. More...

void	set_mbsfn_config (const srsran::mcch_msg_t &mcch)
	Set MBSFN configuration values. More...

void	reset ()
	Clear configuration values. More...

bool	mcch_configured ()
	Return true if MCCH has been configured. More...

uint8_t	mbsfn_area_id ()
	Returns the current MBSFN area ID. More...

srsran_mbsfn_cfg_t	mbsfn_config_for_tti (uint32_t tti, unsigned &area)
	Returns the MBSFN configuration (MCS, etc) for the subframe with the passed TTI. More...

void	set_decode_mcch (bool d)
	Enable MCCH decoding. More...

uint8_t	nof_mbsfn_prb ()
	Get number of PRB in MBSFN/PMCH. More...

void	set_nof_mbsfn_prb (uint8_t prb)
	Override number of PRB in MBSFN/PMCH. More...

void	set_cell ()

bool	is_cas_subframe (unsigned tti)

bool	is_mbsfn_subframe (unsigned tti)

const std::vector< mch_info_t > &	mch_info ()

void	set_dest_for_lcid (uint32_t mch_idx, int lcid, std::string dest)

SubcarrierSpacing	mbsfn_subcarrier_spacing ()

float	mbsfn_subcarrier_spacing_khz ()

srsran::mcch_msg_t &	mcch ()

Public Attributes
int	_mcs = 0

get_samples_t	_sample_cb

Private Attributes
const libconfig::Config &	_cfg

srsran_ue_sync_t	_ue_sync = {}

srsran_ue_cellsearch_t	_cell_search = {}

srsran_ue_mib_sync_t	_mib_sync = {}

srsran_ue_mib_t	_mib = {}

srsran_cell_t	_cell = {}

bool	_decode_mcch = false

cf_t *	_mib_buffer [SRSRAN_MAX_CHANNELS] = {}

uint32_t	_buffer_max_samples = 0

uint32_t	_tti = 0

uint8_t	_mcch_table [10] = {}

bool	_mcch_configured = false

srsran::sib13_t	_sib13 = {}

srsran::mcch_msg_t	_mcch = {}

bool	_mch_configured = false

uint8_t	_cs_nof_prb

std::vector< mch_info_t >	_mch_info

std::map< uint32_t, std::map< int, std::string > >	_dests

int8_t	_override_nof_prb

uint8_t	_rx_channels

bool	_search_extended_cp = true

Detailed Description

The PHY component.

Handles synchronisation and is the central hub for lower level processing

Definition at line 42 of file Phy.h.

Member Typedef Documentation

◆ get_samples_t

typedef std::function<int(cf_t* data[SRSRAN_MAX_CHANNELS], uint32_t nsamples, srsran_timestamp_t* rx_time)> Phy::get_samples_t

Definition of the callback function used to fetch samples from the SDR.

Definition at line 47 of file Phy.h.

Member Enumeration Documentation

◆ SubcarrierSpacing

enum Phy::SubcarrierSpacing

strong

Enumerator
df_15kHz
df_7kHz5
df_1kHz25

Definition at line 179 of file Phy.h.

                                  {
       df_15kHz,
       df_7kHz5,
       df_1kHz25
     };

Constructor & Destructor Documentation

◆ Phy()

Phy::Phy	(	const libconfig::Config &	cfg,
		get_samples_t	cb,
		uint8_t	cs_nof_prb,
		int8_t	override_nof_prb,
		uint8_t	rx_channels
	)

Default constructor.

Parameters

cfg	Config singleton reference
cb	Sample recv callback
cs_nof_prb	Nr of PRBs to use during cell search
override_nof_prb	If set, overrides the nof PRB received in the MIB

Definition at line 42 of file Phy.cpp.

     : _cfg(cfg),
       _sample_cb(std::move(std::move(cb))),
       _cs_nof_prb(cs_nof_prb),
       _override_nof_prb(override_nof_prb),
       _rx_channels(rx_channels) {
   _buffer_max_samples = kMaxBufferSamples;
   _mib_buffer[0] = static_cast<cf_t*>(malloc(_buffer_max_samples * sizeof(cf_t)));  // NOLINT
   _mib_buffer[1] = static_cast<cf_t*>(malloc(_buffer_max_samples * sizeof(cf_t)));  // NOLINT
 }

◆ ~Phy()

Phy::~Phy ( )

virtual

Default destructor.

Definition at line 54 of file Phy.cpp.

           {
   srsran_ue_sync_free(&_ue_sync);
   free(_mib_buffer[0]);  // NOLINT
 }

Member Function Documentation

◆ cell()

srsran_cell_t Phy::cell ( )

inline

Get the current cell (with params adjusted for MBSFN)

Definition at line 91 of file Phy.h.

                          { 
       return _cell;
     }

◆ cell_search()

auto Phy::cell_search ( )

Search for a cell.

Returns true if a cell has been found and the MIB could be decoded, false otherwise.

Definition at line 91 of file Phy.cpp.

                               {
   std::array<srsran_ue_cellsearch_result_t, kMaxCellsToDiscover> found_cells = {0};
  
   uint32_t max_peak_cell = 0;
   int ret = srsran_ue_cellsearch_scan(&_cell_search, found_cells.data(), &max_peak_cell);
   if (ret < 0) {
     spdlog::error("Phy: Error decoding MIB: Error searching PSS\n");
     return false;
   }
   if (ret == 0) {
     spdlog::error("Phy: Could not find any cell in this frequency\n");
     return false;
   }
  
   srsran_cell_t new_cell = {};
   new_cell.id         = found_cells.at(max_peak_cell).cell_id;
   new_cell.cp         = found_cells.at(max_peak_cell).cp;
   new_cell.frame_type = found_cells.at(max_peak_cell).frame_type;
   float cfo           = found_cells.at(max_peak_cell).cfo;
  
   spdlog::info("Phy: PSS/SSS detected: Mode {}, PCI {}, CFO {} KHz, CP {}",
                new_cell.frame_type != 0U ? "TDD" : "FDD", new_cell.id,
                cfo / 1000, srsran_cp_string(new_cell.cp));
  
  
  
   std::array<uint8_t, SRSRAN_BCH_PAYLOAD_LEN> bch_payload = {};
   /* Find and decode MIB */
   int sfn_offset = 0;
  
   // Try to decode MIB-MBMS
   new_cell.mbms_dedicated = true;
   if (srsran_ue_mib_sync_set_cell_prb(&_mib_sync, new_cell, _cs_nof_prb) != 0) {
     spdlog::error("Phy: Error setting UE MIB sync cell");
     return false;
   }
   srsran_ue_sync_reset(&_mib_sync.ue_sync);
   ret = srsran_ue_mib_sync_decode_prb(&_mib_sync, 40, bch_payload.data(), &new_cell.nof_ports, &sfn_offset, _cs_nof_prb);
  
   if (!ret) { // MIB-MBMS failed, try to decode regular MIB
     init();
     new_cell.mbms_dedicated = false;
     if (srsran_ue_mib_sync_set_cell_prb(&_mib_sync, new_cell, _cs_nof_prb) != 0) {
       spdlog::error("Phy: Error setting UE MIB sync cell");
       return false;
     }
     srsran_ue_sync_reset(&_mib_sync.ue_sync);
     ret = srsran_ue_mib_sync_decode_prb(&_mib_sync, 40, bch_payload.data(), &new_cell.nof_ports, &sfn_offset, _cs_nof_prb);
   }
  
   if (ret == 1) {
     uint32_t sfn = 0;
  
     if (new_cell.mbms_dedicated) {
       srsran_pbch_mib_mbms_unpack(bch_payload.data(), &new_cell, &sfn, nullptr,
           _override_nof_prb);
     } else {
       srsran_pbch_mib_unpack(bch_payload.data(), &new_cell, &sfn);
     }
     sfn = (sfn + sfn_offset) % 1024;
  
     spdlog::info(
         "Phy: MIB Decoded. {} cell, Mode {}, PCI {}, PRB {}, Ports {}, CFO {} KHz, SFN "
         "{}, sfn_offset {}\n",
         new_cell.mbms_dedicated ? "MBMS dedicated" : "MBMS/Unicast mixed",
         new_cell.frame_type != 0u ? "TDD" : "FDD", new_cell.id,
         new_cell.nof_prb, new_cell.nof_ports, cfo / 1000, sfn, sfn_offset);
  
     if (!srsran_cell_isvalid(&new_cell)) {
       spdlog::error("SYNC:  Detected invalid cell.\n");
       return false;
     }
  
     _cell = new_cell;
     _cell.mbsfn_prb = _cell.nof_prb;
  
     if (srsran_ue_sync_set_cell(&_ue_sync, cell()) != 0) {
       spdlog::error("Phy: failed to set cell.\n");
       return false;
     }
     if (srsran_ue_mib_set_cell(&_mib, cell()) != 0) {
       spdlog::error("Phy: Error setting UE MIB cell");
       return false;
     }
  
     return true;
   }
  
   spdlog::error("Phy: failed to receive MIB\n");
   return false;
 }

◆ cfo()

float Phy::cfo ( )

inline

Get the current CFO value.

Definition at line 108 of file Phy.h.

108 { return srsran_ue_sync_get_cfo(&_ue_sync);}

◆ get_next_frame()

auto Phy::get_next_frame	(	cf_t **	buffer,
		uint32_t	size
	)

Get the sample data for the next subframe.

Definition at line 220 of file Phy.cpp.

                                                              {
   return 1 == srsran_ue_sync_zerocopy(&_ue_sync, buffer, size);
 }

◆ init()

auto Phy::init ( )

Initialize the underlying components.

Definition at line 192 of file Phy.cpp.

                        {
   if (srsran_ue_cellsearch_init_multi_prb_cp(&_cell_search, 8, receive_callback, _rx_channels,
                                       this, _cs_nof_prb, _search_extended_cp) != 0) {
     spdlog::error("Phy: error while initiating UE cell search\n");
     return false;
   }
   srsran_ue_cellsearch_set_nof_valid_frames(&_cell_search, 4);
  
   if (srsran_ue_sync_init_multi(&_ue_sync, MAX_PRB, false, receive_callback, _rx_channels,
                                 this) != 0) {
     spdlog::error("Cannot init ue_sync");
     return false;
   }
  
   if (srsran_ue_mib_sync_init_multi_prb(&_mib_sync, receive_callback, _rx_channels, this,
                                     _cs_nof_prb) != 0) {
     spdlog::error("Cannot init ue_mib_sync");
     return false;
   }
  
   if (srsran_ue_mib_init(&_mib, _mib_buffer[0], MAX_PRB) != 0) {
     spdlog::error("Cannot init ue_mib");
     return false;
   }
  
   return true;
 }

◆ is_cas_subframe()

auto Phy::is_cas_subframe ( unsigned tti )

Definition at line 303 of file Phy.cpp.

 {
   if (_cell.mbms_dedicated) {
     // This is subframe 0 in a radio frame divisible by 4, and hence a CAS frame. 
     return tti%40 == 0;
   } else {
     unsigned sfn = tti / 10;
     return (tti%10 == 0 || tti%10 == 5); 
   }
 }

◆ is_mbsfn_subframe()

auto Phy::is_mbsfn_subframe ( unsigned tti )

Definition at line 314 of file Phy.cpp.

 {
   if (_cell.mbms_dedicated) {
     // This is subframe 0 in a radio frame divisible by 4, and hence a CAS frame. 
     return !is_cas_subframe(tti);
   } else {
     return !is_cas_subframe(tti) &&
       (tti%10 == 1 || tti%10 == 2 || tti%10 == 3 || tti%10 == 6 || tti%10 == 7 || tti%10 == 8);
   }
 }

◆ mbsfn_area_id()

uint8_t Phy::mbsfn_area_id ( )

inline

Returns the current MBSFN area ID.

Definition at line 138 of file Phy.h.

138 { return _sib13.mbsfn_area_info_list[0].mbsfn_area_id; }

Phy::_sib13

srsran::sib13_t _sib13

Definition: Phy.h:230

◆ mbsfn_config_for_tti()

auto Phy::mbsfn_config_for_tti	(	uint32_t	tti,
		unsigned &	area
	)

Returns the MBSFN configuration (MCS, etc) for the subframe with the passed TTI.

Definition at line 324 of file Phy.cpp.

                           {
   srsran_mbsfn_cfg_t cfg;
   cfg.enable                  = false;
   cfg.is_mcch                 = false;
  
   if (!_mcch_configured) {
     {
       return cfg;
     }
   }
  
   uint32_t sfn = tti / 10;
   uint8_t sf = tti % 10;
  
   srsran::mbsfn_area_info_t& area_info = _sib13.mbsfn_area_info_list[0];
  
   cfg.mbsfn_area_id = area_info.mbsfn_area_id;
   cfg.non_mbsfn_region_length = enum_to_number(area_info.non_mbsfn_region_len);
  
   if (sfn % enum_to_number(area_info.mcch_cfg.mcch_repeat_period) == area_info.mcch_cfg.mcch_offset &&
       _mcch_table[sf] == 1) {
     // MCCH
     if (_decode_mcch) {
       cfg.mbsfn_mcs               = enum_to_number(area_info.mcch_cfg.sig_mcs);
       cfg.enable                  = true;
       cfg.is_mcch                 = true;
     }
   } else if (sfn % enum_to_number(area_info.mcch_cfg.mcch_repeat_period) == area_info.mcch_cfg.mcch_offset &&
       sf == 1) {
       cfg.mbsfn_mcs               = enum_to_number(area_info.mcch_cfg.sig_mcs);
       cfg.enable                  = true;
       cfg.is_mcch                 = false;
   } else {
     if (_mch_configured) {
       cfg.mbsfn_area_id = area_info.mbsfn_area_id;
  
       for (uint32_t i = 0; i < _mcch.nof_pmch_info; i++) {
         unsigned fn_in_scheduling_period =  sfn % enum_to_number(_mcch.pmch_info_list[i].mch_sched_period);
         unsigned sf_idx = fn_in_scheduling_period * 10 + sf 
           - (fn_in_scheduling_period / 4) // minus 1 CAS SF per 4 SFNs 
           - 1; // minus 1 MCCH SF per scheduling period;
  
         spdlog::debug("i {}, tti {}, fn_in_ {}, sf_idx {}", i, tti, fn_in_scheduling_period,  sf_idx);
  
         if (sf_idx <= _mcch.pmch_info_list[i].sf_alloc_end) {
           area = i;
           if ((i == 0 && fn_in_scheduling_period == 0 && sf == 1) ||
               (i > 0 && _mcch.pmch_info_list[i-1].sf_alloc_end + 1 == sf_idx)) {
             spdlog::debug("assigning sig_mcs {}, mch_idx is {}",  area_info.mcch_cfg.sig_mcs, area);
             cfg.mbsfn_mcs = enum_to_number(area_info.mcch_cfg.sig_mcs);
           } else {
             spdlog::debug("assigning pmch_mcs {}, mch_idx is {}", _mcch.pmch_info_list[i].data_mcs, area);
             cfg.mbsfn_mcs = _mcch.pmch_info_list[i].data_mcs;
           }
           cfg.enable = true;
           break;
         }
       }
     }
   }
   return cfg;
 }

◆ mbsfn_subcarrier_spacing()

SubcarrierSpacing Phy::mbsfn_subcarrier_spacing ( )

inline

Definition at line 185 of file Phy.h.

                                                  {
       if (_cell.mbms_dedicated) {
         switch (_sib13.mbsfn_area_info_list[0].subcarrier_spacing) {
           case srsran::mbsfn_area_info_t::subcarrier_spacing_t::khz_1dot25: return SubcarrierSpacing::df_1kHz25;
           case srsran::mbsfn_area_info_t::subcarrier_spacing_t::khz_7dot5: return SubcarrierSpacing::df_7kHz5;
           default: return SubcarrierSpacing::df_15kHz;
         }
       } else {
           return SubcarrierSpacing::df_15kHz;
       }
     }

◆ mbsfn_subcarrier_spacing_khz()

float Phy::mbsfn_subcarrier_spacing_khz ( )

inline

Definition at line 197 of file Phy.h.

                                          {
       if (_cell.mbms_dedicated) {
         switch (_sib13.mbsfn_area_info_list[0].subcarrier_spacing) {
           case srsran::mbsfn_area_info_t::subcarrier_spacing_t::khz_1dot25: return 1.25;
           case srsran::mbsfn_area_info_t::subcarrier_spacing_t::khz_7dot5: return 7.5;
           default: return 15;
         }
       } else {
           return 15;
       }
     }

◆ mcch()

srsran::mcch_msg_t& Phy::mcch ( )

inline

Definition at line 209 of file Phy.h.

209 { return _mcch; }

◆ mcch_configured()

bool Phy::mcch_configured ( )

inline

Return true if MCCH has been configured.

Definition at line 133 of file Phy.h.

133 { return _mcch_configured; }

◆ mch_info()

const std::vector< mch_info_t>& Phy::mch_info ( )

inline

Definition at line 175 of file Phy.h.

175 { return _mch_info; }

Phy::_mch_info

std::vector< mch_info_t > _mch_info

Definition: Phy.h:237

◆ nof_mbsfn_prb()

uint8_t Phy::nof_mbsfn_prb ( )

inline

Get number of PRB in MBSFN/PMCH.

Definition at line 153 of file Phy.h.

153 { return _cell.mbsfn_prb; }

◆ nr_prb()

unsigned Phy::nr_prb ( )

inline

Get the current number of PRB.

Definition at line 98 of file Phy.h.

98 { return _cell.nof_prb; }

◆ reset()

void Phy::reset ( )

inline

Clear configuration values.

Definition at line 128 of file Phy.h.

128 { _mcch_configured = _mch_configured = false; }

◆ set_cell()

auto Phy::set_cell ( )

Definition at line 183 of file Phy.cpp.

                            {
     if (srsran_ue_sync_set_cell(&_ue_sync, cell()) != 0) {
       spdlog::error("Phy: failed to set cell.\n");
     }
     if (srsran_ue_mib_set_cell(&_mib, cell()) != 0) {
       spdlog::error("Phy: Error setting UE MIB cell");
     }
 }

◆ set_cfo_from_channel_estimation()

void Phy::set_cfo_from_channel_estimation ( float cfo )

inline

Set the CFO value from channel estimation.

Definition at line 113 of file Phy.h.

113 { srsran_ue_sync_set_cfo_ref(&_ue_sync, cfo); }

◆ set_decode_mcch()

void Phy::set_decode_mcch ( bool d )

inline

Enable MCCH decoding.

Definition at line 148 of file Phy.h.

148 { _decode_mcch = d; }

◆ set_dest_for_lcid()

void Phy::set_dest_for_lcid	(	uint32_t	mch_idx,
		int	lcid,
		std::string	dest
	)

inline

Definition at line 177 of file Phy.h.

177 { _dests[mch_idx][lcid] = dest; }

Phy::_dests

std::map< uint32_t, std::map< int, std::string > > _dests

Definition: Phy.h:239

◆ set_mbsfn_config()

void Phy::set_mbsfn_config ( const srsran::mcch_msg_t & mcch )

Set MBSFN configuration values.

Definition at line 260 of file Phy.cpp.

                                                        {
   _mcch = mcch;
   _mch_configured = true;
  
   _mch_info.clear();
   for (uint32_t i = 0; i < _mcch.nof_pmch_info; i++) {
     mch_info_t mch_info;
     mch_info.mcs = _mcch.pmch_info_list[i].data_mcs;
  
     for (uint32_t j = 0; j < _mcch.pmch_info_list[i].nof_mbms_session_info; j++) {
       mtch_info_t mtch_info;
       mtch_info.lcid = _mcch.pmch_info_list[i].mbms_session_info_list[j].lc_ch_id;
       char tmgi[20]; // NOLINT
       /* acc to  TS24.008 10.5.6.13:
        * MCC 1,2,3: 901 ->   9, 0, 1
        * MNC 3,1,2:  56 -> (F), 5, 6
        * HEX 0x09F165
        *
        * -------------+-------------+---------
        * MCC digit 2  | MCC digit 1 | Octet 6*
        * -------------+-------------+---------
        * MNC digit 3  | MCC digit 3 | Octet 7*
        * -------------+-------------+---------
        * MNC digit 2  | MNC digit 1 | Octet 8*
        * -------------+-------------+---------
        */
       sprintf (tmgi, "%06x%02x%02x%02x",
          _mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.serviced_id[2] |
          _mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.serviced_id[1] << 8 |
          _mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.serviced_id[0] << 16 , 
          _mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.plmn_id.explicit_value.mcc[1] << 4 | mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.plmn_id.explicit_value.mcc[0],
          ( _mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.plmn_id.explicit_value.nof_mnc_digits == 2 ? 0xF : _mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.plmn_id.explicit_value.mnc[2] ) << 4 | _mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.plmn_id.explicit_value.mcc[2] ,
          _mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.plmn_id.explicit_value.mnc[1] << 4 | _mcch.pmch_info_list[i].mbms_session_info_list[j].tmgi.plmn_id.explicit_value.mnc[0]
          );
       mtch_info.tmgi = tmgi;
       mtch_info.dest = _dests[i][mtch_info.lcid];
       mch_info.mtchs.push_back(mtch_info);
     }
  
     _mch_info.push_back(mch_info);
   }
 }

◆ set_mch_scheduling_info()

void Phy::set_mch_scheduling_info ( const srsran::sib13_t & sib13 )

Set the values received in SIB13.

Definition at line 224 of file Phy.cpp.

                                                             {
   if (sib13.nof_mbsfn_area_info > 1) {
     spdlog::warn("SIB13 has {} MBSFN area info elements - only 1 supported", sib13.nof_mbsfn_area_info);
   }
  
   if (sib13.mbsfn_area_info_list[0].pmch_bandwidth != 0) {
     _cell.mbsfn_prb = sib13.mbsfn_area_info_list[0].pmch_bandwidth;
   }
  
   if (sib13.nof_mbsfn_area_info > 0) {
     _sib13 = sib13;
  
     bzero(&_mcch_table[0], sizeof(uint8_t) * 10);
     if (sib13.mbsfn_area_info_list[0].mcch_cfg.sf_alloc_info_is_r16) {
       generate_mcch_table_r16(
           &_mcch_table[0],
           static_cast<uint32_t>(
             sib13.mbsfn_area_info_list[0].mcch_cfg.sf_alloc_info));
     } else {
       generate_mcch_table(
           &_mcch_table[0],
           static_cast<uint32_t>(
             sib13.mbsfn_area_info_list[0].mcch_cfg.sf_alloc_info));
     }
  
     std::stringstream ss;
     ss << "|";
     for (unsigned char j : _mcch_table) {
       ss << static_cast<int>(j) << "|";
     }
     spdlog::debug("MCCH table: {}", ss.str());
  
     _mcch_configured = true;
   }
 }

◆ set_nof_mbsfn_prb()

void Phy::set_nof_mbsfn_prb ( uint8_t prb )

inline

Override number of PRB in MBSFN/PMCH.

Definition at line 158 of file Phy.h.

158 { _cell.mbsfn_prb = prb; }

◆ synchronize_subframe()

auto Phy::synchronize_subframe ( )

Synchronizes PSS/SSS and tries to deocode the MIB.

Returns true on success, false otherwise.

Definition at line 59 of file Phy.cpp.

                                        {
  
   int ret = srsran_ue_sync_zerocopy(&_ue_sync, _mib_buffer, _buffer_max_samples);  // NOLINT
   if (ret < 0) {
     spdlog::error("SYNC:  Error calling ue_sync_get_buffer.\n");
     return false;
   }
  
   if (ret == 1) {
     std::array<uint8_t, SRSRAN_BCH_PAYLOAD_LEN> bch_payload = {};
     if (srsran_ue_sync_get_sfidx(&_ue_sync) == 0) {
       int sfn_offset = 0;
       int n =
           srsran_ue_mib_decode(&_mib, bch_payload.data(), nullptr, &sfn_offset);
       if (n == 1) {
         uint32_t sfn = 0;
         if (_cell.mbms_dedicated) {
           srsran_pbch_mib_mbms_unpack(bch_payload.data(), &_cell, &sfn, nullptr,
               _override_nof_prb);
           sfn = (sfn + sfn_offset * kSfnOffset) % kMaxSfn;
         } else {
           srsran_pbch_mib_unpack(bch_payload.data(), &_cell, &sfn);
           sfn = (sfn + sfn_offset) % kMaxSfn;
         }
         _tti =  sfn * kSubframesPerFrame;
         return true;
       }
     }
   }
   return false;
 }

◆ tti()

uint32_t Phy::tti ( )

inline

Get the current subframe TTI.

Definition at line 103 of file Phy.h.

103 { return _tti; }

Member Data Documentation

◆ _buffer_max_samples

uint32_t Phy::_buffer_max_samples = 0

private

Definition at line 225 of file Phy.h.

◆ _cell

srsran_cell_t Phy::_cell = {}

private

Definition at line 220 of file Phy.h.

◆ _cell_search

srsran_ue_cellsearch_t Phy::_cell_search = {}

private

Definition at line 217 of file Phy.h.

◆ _cfg

const libconfig::Config& Phy::_cfg

private

Definition at line 215 of file Phy.h.

◆ _cs_nof_prb

uint8_t Phy::_cs_nof_prb

private

Definition at line 235 of file Phy.h.

◆ _decode_mcch

bool Phy::_decode_mcch = false

private

Definition at line 222 of file Phy.h.

◆ _dests

std::map< uint32_t, std::map< int, std::string > > Phy::_dests

private

Definition at line 239 of file Phy.h.

◆ _mcch

srsran::mcch_msg_t Phy::_mcch = {}

private

Definition at line 231 of file Phy.h.

◆ _mcch_configured

bool Phy::_mcch_configured = false

private

Definition at line 229 of file Phy.h.

◆ _mcch_table

uint8_t Phy::_mcch_table[10] = {}

private

Definition at line 228 of file Phy.h.

◆ _mch_configured

bool Phy::_mch_configured = false

private

Definition at line 233 of file Phy.h.

◆ _mch_info

std::vector< mch_info_t > Phy::_mch_info

private

Definition at line 237 of file Phy.h.

◆ _mcs

int Phy::_mcs = 0

Definition at line 211 of file Phy.h.

◆ _mib

srsran_ue_mib_t Phy::_mib = {}

private

Definition at line 219 of file Phy.h.

◆ _mib_buffer

cf_t* Phy::_mib_buffer[SRSRAN_MAX_CHANNELS] = {}

private

Definition at line 224 of file Phy.h.

◆ _mib_sync

srsran_ue_mib_sync_t Phy::_mib_sync = {}

private

Definition at line 218 of file Phy.h.

◆ _override_nof_prb

int8_t Phy::_override_nof_prb

private

Definition at line 241 of file Phy.h.

◆ _rx_channels

uint8_t Phy::_rx_channels

private

Definition at line 242 of file Phy.h.

◆ _sample_cb

get_samples_t Phy::_sample_cb

Definition at line 212 of file Phy.h.

◆ _search_extended_cp

bool Phy::_search_extended_cp = true

private

Definition at line 243 of file Phy.h.

◆ _sib13

srsran::sib13_t Phy::_sib13 = {}

private

Definition at line 230 of file Phy.h.

◆ _tti

uint32_t Phy::_tti = 0

private

Definition at line 226 of file Phy.h.

◆ _ue_sync

srsran_ue_sync_t Phy::_ue_sync = {}

private

Definition at line 216 of file Phy.h.

The documentation for this class was generated from the following files:

src/Phy.h
src/Phy.cpp

Classes

Public Types

Public Member Functions

Public Attributes

Private Attributes

Detailed Description

Member Typedef Documentation

◆ get_samples_t

Member Enumeration Documentation

◆ SubcarrierSpacing

Constructor & Destructor Documentation

◆ Phy()

◆ ~Phy()

Member Function Documentation

◆ cell()

◆ cell_search()

◆ cfo()

◆ get_next_frame()

◆ init()

◆ is_cas_subframe()

◆ is_mbsfn_subframe()

◆ mbsfn_area_id()

◆ mbsfn_config_for_tti()

◆ mbsfn_subcarrier_spacing()

◆ mbsfn_subcarrier_spacing_khz()

◆ mcch()

◆ mcch_configured()

◆ mch_info()

◆ nof_mbsfn_prb()

◆ nr_prb()

◆ reset()

◆ set_cell()

◆ set_cfo_from_channel_estimation()

◆ set_decode_mcch()

◆ set_dest_for_lcid()

◆ set_mbsfn_config()

◆ set_mch_scheduling_info()

◆ set_nof_mbsfn_prb()

◆ synchronize_subframe()

◆ tti()

Member Data Documentation

◆ _buffer_max_samples

◆ _cell

◆ _cell_search

◆ _cfg

◆ _cs_nof_prb

◆ _decode_mcch

◆ _dests

◆ _mcch

◆ _mcch_configured

◆ _mcch_table

◆ _mch_configured

◆ _mch_info

◆ _mcs

◆ _mib

◆ _mib_buffer

◆ _mib_sync

◆ _override_nof_prb

◆ _rx_channels

◆ _sample_cb

◆ _search_extended_cp

◆ _sib13

◆ _tti

◆ _ue_sync