mirror of https://github.com/PentHertz/srsLTE.git
131 lines
4.4 KiB
C++
131 lines
4.4 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#ifndef SRSENB_RRC_ENDC_H
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#define SRSENB_RRC_ENDC_H
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#include "rrc.h"
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#include "rrc_ue.h"
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#include "srsran/adt/fsm.h"
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#include <map>
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namespace srsenb {
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/**
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* @brief This procedure handles the secondary node (SgNB) addition for
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* EUTRA-NR Dual connectivity (ENDC)
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*
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*/
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class rrc::ue::rrc_endc : public srsran::fsm_t<rrc::ue::rrc_endc>
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{
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public:
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// public events called from EUTRA-RRC
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struct sgnb_add_req_sent_ev {};
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/// called when 5G RRC accepted new user
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struct sgnb_add_req_ack_ev {
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sgnb_addition_ack_params_t params;
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};
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struct sgnb_add_req_reject_ev {};
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/**
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* @brief Non-standard event sent from NR-RRC to EUTRA when UE has attached to NR cell
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*
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* sent after Reconfig complete and contention resolution on NR side
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*/
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struct sgnb_add_complete_ev {
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uint16_t nr_rnti; /// RNTI assigned to UE on NR carrier
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};
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rrc_endc(srsenb::rrc::ue* outer_ue);
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bool fill_conn_recfg(asn1::rrc::rrc_conn_recfg_r8_ies_s* conn_recfg);
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void handle_eutra_capabilities(const asn1::rrc::ue_eutra_cap_s& eutra_caps);
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void handle_ue_meas_report(const asn1::rrc::meas_report_s& msg);
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bool is_endc_supported();
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private:
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// Send SgNB addition request to gNB
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bool start_sgnb_addition();
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bool is_endc_activation_running() const { return not is_in_state<endc_deactivated_st>(); }
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rrc::ue* rrc_ue = nullptr;
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rrc* rrc_enb = nullptr;
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srslog::basic_logger& logger;
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// vars
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bool endc_supported = false;
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asn1::rrc::rrc_conn_recfg_complete_s pending_recfg_complete;
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// fixed ENDC variables
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const uint32_t eutra_drb_id = 1; // The DRB ID that converted to NR
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const uint32_t lcid_drb_nr = 4;
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// internal events
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struct rrc_recfg_sent_ev {};
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// states
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struct endc_deactivated_st {}; // initial state where user is served over EUTRA only
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struct wait_sgnb_add_req_resp_st {};
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struct prepare_recfg_st {
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sgnb_addition_ack_params_t sgnb_config; // Store NR cell group config, etc.
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void enter(rrc_endc* f, const sgnb_add_req_ack_ev& ev);
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explicit prepare_recfg_st(rrc_endc* parent_);
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private:
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srslog::basic_logger& logger;
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};
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struct wait_add_complete_st {}; // user needs to complete RA procedure and send C-RNTI CE
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struct endc_activated_st {}; // user has enabled EN-DC successfully and is currently served
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// FSM guards
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// FSM transition handlers
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void handle_sgnb_add_req_ack(wait_sgnb_add_req_resp_st& s, const sgnb_add_req_ack_ev& ev);
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protected:
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// states
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state_list<endc_deactivated_st, wait_sgnb_add_req_resp_st, prepare_recfg_st, wait_add_complete_st, endc_activated_st>
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states{this,
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endc_deactivated_st{},
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wait_sgnb_add_req_resp_st{},
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prepare_recfg_st{this},
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wait_add_complete_st{},
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endc_activated_st{}};
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// transitions
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using fsm = rrc_endc;
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// clang-format off
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using transitions = transition_table<
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// Start Target Event Action Guard
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// +---------------------------+--------------------------+------------------------+------------------------------+-------------------------+
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row< endc_deactivated_st, wait_sgnb_add_req_resp_st, sgnb_add_req_sent_ev, nullptr >,
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// +---------------------------+--------------------------+------------------------+------------------------------+-------------------------+
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row< wait_sgnb_add_req_resp_st, prepare_recfg_st, sgnb_add_req_ack_ev, &fsm::handle_sgnb_add_req_ack >,
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row< wait_sgnb_add_req_resp_st, endc_deactivated_st, sgnb_add_req_reject_ev >,
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row< prepare_recfg_st, wait_add_complete_st, rrc_recfg_sent_ev >,
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row< wait_add_complete_st, endc_activated_st, sgnb_add_complete_ev >
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// +---------------------------+--------------------------+------------------------+------------------------------+-------------------------+
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>;
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// clang-format on
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};
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} // namespace srsenb
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#endif // SRSENB_RRC_ENDC_H
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