Rrc Class Reference

Simple RRC component between PHY and RLC. More...

#include <Rrc.h>

Inheritance diagram for Rrc:

Collaboration diagram for Rrc:

Public Types
enum	rrc_state_t { ACQUIRE_SIB, ACQUIRE_AREA_CONFIG, STREAMING }

Public Member Functions
	Rrc (const libconfig::Config &cfg, Phy &phy, srslte::rlc &rlc)
	Default constructor. More...
void	max_retx_attempted () override
rrc_state_t	state ()
void	reset ()
void	write_pdu_mch (uint32_t lcid, srslte::unique_byte_buffer_t pdu) override
	Handle a MCH PDU. More...
void	write_pdu_bcch_dlsch (srslte::unique_byte_buffer_t pdu) override
	Handle SIB1(SIB13) from BCCH/DLSCH, and set the scheduling info in PHY.
void	write_pdu (uint32_t lcid, srslte::unique_byte_buffer_t pdu) override
void	write_pdu_bcch_bch (srslte::unique_byte_buffer_t pdu) override
void	write_pdu_pcch (srslte::unique_byte_buffer_t pdu) override
std::string	get_rb_name (uint32_t lcid) override

Detailed Description

Simple RRC component between PHY and RLC.

Handles only reception of SIB1 (incl. SIB13) in CAS, and MCCH PDUs.

Definition at line 34 of file Rrc.h.

Constructor & Destructor Documentation

Rrc()

Rrc::Rrc ( const libconfig::Config &  cfg, Phy &  phy, srslte::rlc &  rlc  )

inline

Default constructor.

Parameters

cfg	Config singleton reference
rlc	RLC reference
rlc	PHY reference

Definition at line 43 of file Rrc.h.

      : _cfg(cfg)
      , _rlc(rlc)
      , _phy(phy) {}

Member Function Documentation

write_pdu_mch()

void Rrc::write_pdu_mch ( uint32_t  lcid, srslte::unique_byte_buffer_t  pdu  )

override

Handle a MCH PDU.

Automatically creates MRB bearers for all discovered LCIDs, and sets the MBSFN configuration in PHY.

Definition at line 31 of file Rrc.cpp.

                                                                  {
  spdlog::trace("rrc: write_pdu_mch");
  if (pdu->N_bytes <= 0 || pdu->N_bytes >= SRSLTE_MAX_BUFFER_SIZE_BITS) {
    return;
  }
  asn1::cbit_ref bref(pdu->msg, pdu->N_bytes);
  asn1::rrc::mcch_msg_s msg;
  if (msg.unpack(bref) != asn1::SRSASN_SUCCESS ||
      msg.msg.type().value != mcch_msg_type_c::types_opts::c1) {
    spdlog::error("Failed to unpack MCCH message");
    return;
  }
  asn1::json_writer json_writer;
  msg.to_json(json_writer);
  spdlog::debug("BCCH-DLSCH message content:\n{}", json_writer.to_string());
 
  srslte::mcch_msg_t mcch = srslte::make_mcch_msg(msg);
 
  // add bearers for all LCIDs
  for (uint32_t i = 0; i < mcch.nof_pmch_info; i++) {
    for (uint32_t j = 0; j < mcch.pmch_info_list[i].nof_mbms_session_info; j++) {
      uint32_t lcid = mcch.pmch_info_list[i].mbms_session_info_list[j].lc_ch_id;
      if (!_rlc.has_bearer_mrb(lcid)) {
        _rlc.add_bearer_mrb(lcid);
      }
    }
  }
 
  _phy.set_mbsfn_config(mcch);
  _phy.set_decode_mcch(false);
  _state = STREAMING;
}

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

• src/Rrc.h
• src/Rrc.cpp