From b37923312ee354fb7b4f58219af7d99bf873ac52 Mon Sep 17 00:00:00 2001 From: Francisco Paisana Date: Wed, 20 May 2020 18:46:53 +0100 Subject: [PATCH] added intraenb handover fsm and respective test --- srsenb/hdr/stack/rrc/rrc_mobility.h | 121 +++++++--- srsenb/src/stack/rrc/rrc.cc | 5 +- srsenb/src/stack/rrc/rrc_mobility.cc | 311 ++++++++++++++++++------- srsenb/test/upper/rrc_mobility_test.cc | 63 +++++ 4 files changed, 389 insertions(+), 111 deletions(-) diff --git a/srsenb/hdr/stack/rrc/rrc_mobility.h b/srsenb/hdr/stack/rrc/rrc_mobility.h index 4866e80af..735a46645 100644 --- a/srsenb/hdr/stack/rrc/rrc_mobility.h +++ b/srsenb/hdr/stack/rrc/rrc_mobility.h @@ -24,6 +24,7 @@ #include "rrc.h" #include "rrc_ue.h" +#include "srslte/common/fsm.h" #include "srslte/common/logmap.h" #include @@ -71,6 +72,8 @@ private: srslte::log_ref rrc_log; }; +enum class ho_interface_t { S1, X2, interSector }; + class rrc::enb_mobility_handler { public: @@ -89,26 +92,34 @@ private: const rrc_cfg_t* cfg = nullptr; }; -class rrc::ue::rrc_mobility +class rrc::ue::rrc_mobility : public srslte::fsm_t { public: + // public events + struct user_crnti_upd_ev { + uint16_t crnti; + uint16_t temp_crnti; + }; + explicit rrc_mobility(srsenb::rrc::ue* outer_ue); bool fill_conn_recfg_msg(asn1::rrc::rrc_conn_recfg_r8_ies_s* conn_recfg); void handle_ue_meas_report(const asn1::rrc::meas_report_s& msg); void handle_ho_preparation_complete(bool is_success, srslte::unique_byte_buffer_t container); + bool is_ho_running() const { return not is_in_state(); } private: - enum class ho_interface_t { S1, X2, interSector }; - + // Handover from source cell bool start_ho_preparation(uint32_t target_eci, uint8_t measobj_id, bool fwd_direct_path_available); bool start_enb_status_transfer(); + // Handover to target cell bool update_ue_var_meas_cfg(const asn1::rrc::meas_cfg_s& source_meas_cfg, uint32_t target_enb_cc_idx, asn1::rrc::meas_cfg_s* diff_meas_cfg); bool update_ue_var_meas_cfg(const var_meas_cfg_t& source_var_meas_cfg, uint32_t target_enb_cc_idx, asn1::rrc::meas_cfg_s* diff_meas_cfg); + void fill_mobility_reconf_common(asn1::rrc::dl_dcch_msg_s& msg, const cell_info_common& target_cell); rrc::ue* rrc_ue = nullptr; rrc* rrc_enb = nullptr; @@ -119,41 +130,87 @@ private: // vars std::shared_ptr ue_var_meas; - class sourceenb_ho_proc_t - { - public: - struct ho_prep_result { - bool is_success; - srslte::unique_byte_buffer_t rrc_container; + // events + struct ho_meas_report_ev { + uint32_t target_eci = 0; + const asn1::rrc::cells_to_add_mod_s* meas_cell = nullptr; + const asn1::rrc::meas_obj_to_add_mod_s* meas_obj = nullptr; + }; + struct ho_req_rx_ev { + uint32_t target_cell_id; + }; + using unsuccessful_outcome_ev = std::false_type; + + // states + struct idle_st {}; + struct intraenb_ho_st { + const cell_info_common* target_cell = nullptr; + const cell_ctxt_dedicated* source_cell_ctxt = nullptr; + + void enter(rrc_mobility* f); + }; + struct s1_target_ho_st { + uint32_t target_cell_id; + }; + struct s1_source_ho_st : public subfsm_t { + ho_meas_report_ev report; + + struct wait_ho_req_ack_st { + void enter(s1_source_ho_st* f); + }; + struct status_transfer_st { + void enter(s1_source_ho_st* f); + + bool is_ho_cmd_sent = false; }; - explicit sourceenb_ho_proc_t(rrc_mobility* ue_mobility_); - srslte::proc_outcome_t init(const asn1::rrc::meas_id_to_add_mod_s& measid_, - const asn1::rrc::meas_obj_to_add_mod_s& measobj_, - const asn1::rrc::report_cfg_to_add_mod_s& repcfg_, - const asn1::rrc::cells_to_add_mod_s& cell_, - const asn1::rrc::meas_result_eutra_s& meas_res_, - uint32_t target_eci_); - srslte::proc_outcome_t step() { return srslte::proc_outcome_t::yield; } - srslte::proc_outcome_t react(ho_prep_result); - static const char* name() { return "Handover"; } + explicit s1_source_ho_st(rrc_mobility* parent_) : base_t(parent_) {} private: - // args - rrc_mobility* parent = nullptr; - // run args - const asn1::rrc::meas_id_to_add_mod_s* measid = nullptr; - const asn1::rrc::meas_obj_to_add_mod_s* measobj = nullptr; - const asn1::rrc::report_cfg_to_add_mod_s* repcfg = nullptr; - const asn1::rrc::cells_to_add_mod_s* cell = nullptr; - asn1::rrc::meas_result_eutra_s meas_res; - uint32_t target_eci = 0; + void handle_ho_cmd(wait_ho_req_ack_st& s, status_transfer_st& d, const srslte::unique_byte_buffer_t& container); - enum class state_t { ho_preparation, ho_execution } state{}; - ho_interface_t ho_interface{}; - bool fwd_direct_path_available = false; + protected: + using fsm = s1_source_ho_st; + state_list states{this}; + // clang-format off + using transitions = transition_table< + // Start Target Event Action + // +-------------------+------------------+------------------------------+---------------------------+ + from_any_state< idle_st, srslte::failure_ev >, + row< wait_ho_req_ack_st, status_transfer_st, srslte::unique_byte_buffer_t, &fsm::handle_ho_cmd > + // +-------------------+------------------+------------------------------+--------- -----------------+ + >; + // clang-format on }; - srslte::proc_t source_ho_proc; + + // FSM guards + bool needs_s1_ho(idle_st& s, const ho_meas_report_ev& meas_report) const; + bool needs_intraenb_ho(idle_st& s, const ho_meas_report_ev& meas_report) const; + + // FSM transition handlers + void handle_s1_meas_report(idle_st& s, s1_source_ho_st& d, const ho_meas_report_ev& meas_report); + void handle_intraenb_meas_report(idle_st& s, intraenb_ho_st& d, const ho_meas_report_ev& meas_report); + void handle_crnti_ce(intraenb_ho_st& s, idle_st& d, const user_crnti_upd_ev& ev); + +protected: + // states + state_list states{this, + idle_st{}, + intraenb_ho_st{}, + s1_target_ho_st{}, + s1_source_ho_st{this}}; + + // transitions + using fsm = rrc_mobility; + // clang-format off + using transitions = transition_table< + // Start Target Event Action Guard (optional) + // +------------+---------------+--------------------+---------------------------------+---------------------------+ + row< idle_st, intraenb_ho_st, ho_meas_report_ev, &fsm::handle_intraenb_meas_report, &fsm::needs_intraenb_ho >, + row< idle_st, s1_source_ho_st, ho_meas_report_ev, &fsm::handle_s1_meas_report, &fsm::needs_s1_ho >, + row< intraenb_ho_st, idle_st, user_crnti_upd_ev, &fsm::handle_crnti_ce > + >; + // clang-format on }; } // namespace srsenb diff --git a/srsenb/src/stack/rrc/rrc.cc b/srsenb/src/stack/rrc/rrc.cc index 81f62e71f..587549132 100644 --- a/srsenb/src/stack/rrc/rrc.cc +++ b/srsenb/src/stack/rrc/rrc.cc @@ -195,7 +195,10 @@ void rrc::upd_user(uint16_t new_rnti, uint16_t old_rnti) // Send Reconfiguration to old_rnti if is RRC_CONNECT or RRC Release if already released here auto old_it = users.find(old_rnti); if (old_it != users.end()) { - if (old_it->second->is_connected()) { + auto ue_ptr = old_it->second.get(); + if (ue_ptr->mobility_handler->is_ho_running()) { + ue_ptr->mobility_handler->trigger(ue::rrc_mobility::user_crnti_upd_ev{old_rnti, new_rnti}); + } else if (ue_ptr->is_connected()) { old_it->second->send_connection_reconf_upd(srslte::allocate_unique_buffer(*pool)); } else { old_it->second->send_connection_reject(); diff --git a/srsenb/src/stack/rrc/rrc_mobility.cc b/srsenb/src/stack/rrc/rrc_mobility.cc index ecb559468..4239003a3 100644 --- a/srsenb/src/stack/rrc/rrc_mobility.cc +++ b/srsenb/src/stack/rrc/rrc_mobility.cc @@ -460,12 +460,12 @@ rrc::enb_mobility_handler::enb_mobility_handler(rrc* rrc_) : rrc_ptr(rrc_), cfg( ************************************************************************************************/ rrc::ue::rrc_mobility::rrc_mobility(rrc::ue* outer_ue) : + base_t(outer_ue->parent->rrc_log), rrc_ue(outer_ue), rrc_enb(outer_ue->parent), cfg(outer_ue->parent->enb_mobility_cfg.get()), pool(outer_ue->pool), rrc_log(outer_ue->parent->rrc_log), - source_ho_proc(this), ue_var_meas(std::make_shared()) {} @@ -474,7 +474,7 @@ bool rrc::ue::rrc_mobility::fill_conn_recfg_msg(asn1::rrc::rrc_conn_recfg_r8_ies { // only reconfigure meas_cfg if no handover is occurring. // NOTE: We basically freeze ue_var_meas for the whole duration of the handover procedure - if (source_ho_proc.is_busy()) { + if (is_ho_running()) { return false; } @@ -488,6 +488,10 @@ bool rrc::ue::rrc_mobility::fill_conn_recfg_msg(asn1::rrc::rrc_conn_recfg_r8_ies //! Method called whenever the eNB receives a MeasReport from the UE. In normal situations, an HO procedure is started void rrc::ue::rrc_mobility::handle_ue_meas_report(const meas_report_s& msg) { + if (not is_in_state()) { + Info("Received a MeasReport while UE is performing Handover. Ignoring...\n"); + return; + } // Check if meas_id is valid const meas_results_s& meas_res = msg.crit_exts.c1().meas_report_r8().meas_results; if (not meas_res.meas_result_neigh_cells_present) { @@ -507,34 +511,33 @@ void rrc::ue::rrc_mobility::handle_ue_meas_report(const meas_report_s& msg) const meas_result_list_eutra_l& eutra_list = meas_res.meas_result_neigh_cells.meas_result_list_eutra(); // Find respective ReportCfg and MeasObj - auto obj_it = srslte::find_rrc_obj_id(ue_var_meas->meas_objs(), measid_it->meas_obj_id); - auto rep_it = srslte::find_rrc_obj_id(ue_var_meas->rep_cfgs(), measid_it->report_cfg_id); + ho_meas_report_ev meas_ev{}; + auto obj_it = srslte::find_rrc_obj_id(ue_var_meas->meas_objs(), measid_it->meas_obj_id); + meas_ev.meas_obj = &(*obj_it); // iterate from strongest to weakest cell - // NOTE: From now we just look at the strongest. - if (eutra_list.size() > 0) { - uint32_t i = 0; - - uint16_t pci = eutra_list[i].pci; - const cells_to_add_mod_list_l& cells = obj_it->meas_obj.meas_obj_eutra().cells_to_add_mod_list; - - const cells_to_add_mod_s* cell_it = - std::find_if(cells.begin(), cells.end(), [pci](const cells_to_add_mod_s& c) { return c.pci == pci; }); + const cells_to_add_mod_list_l& cells = obj_it->meas_obj.meas_obj_eutra().cells_to_add_mod_list; + const cell_ctxt_dedicated* pcell = rrc_ue->cell_ded_list.get_ue_cc_idx(UE_PCELL_CC_IDX); + const auto& meas_list_cfg = pcell->cell_common->cell_cfg.meas_cfg.meas_cells; + const cells_to_add_mod_s* cell_it = nullptr; + // const meas_result_eutra_s* chosen_meas = nullptr; + for (const meas_result_eutra_s& e : eutra_list) { + uint16_t pci = e.pci; + cell_it = std::find_if(cells.begin(), cells.end(), [pci](const cells_to_add_mod_s& c) { return c.pci == pci; }); if (cell_it == cells.end()) { rrc_log->warning("The PCI=%d inside the MeasReport is not recognized.\n", pci); - return; + continue; } + meas_ev.meas_cell = cell_it; + meas_ev.target_eci = std::find_if(meas_list_cfg.begin(), + meas_list_cfg.end(), + [pci](const meas_cell_cfg_t& c) { return c.pci == pci; }) + ->eci; // eNB found the respective cell. eNB takes "HO Decision" - // TODO: check what to do here to take the decision. - // NOTE: for now just accept anything. - - // Target cell to handover to was selected. - auto& L = rrc_enb->cfg.cell_list[rrc_ue->get_ue_cc_cfg(UE_PCELL_CC_IDX)->enb_cc_idx].meas_cfg.meas_cells; - uint32_t target_eci = std::find_if(L.begin(), L.end(), [pci](meas_cell_cfg_t& c) { return c.pci == pci; })->eci; - if (not source_ho_proc.launch(*measid_it, *obj_it, *rep_it, *cell_it, eutra_list[i], target_eci)) { - Error("Failed to start HO procedure, as it is already on-going\n"); - return; + // NOTE: From now we just choose the strongest. + if (trigger(meas_ev)) { + break; } } } @@ -693,9 +696,22 @@ bool rrc::ue::rrc_mobility::start_ho_preparation(uint32_t target_eci, return success; } +/** + * Description: Handover Preparation Complete (with success or failure) + * - MME --> SeNB + * - Response from MME on whether the HandoverRequired command is valid and the TeNB was able to allocate + * space for the UE + * @param is_success flag to whether an HandoverCommand or HandoverReject was received + * @param container RRC container with HandoverCommand to send to UE + */ void rrc::ue::rrc_mobility::handle_ho_preparation_complete(bool is_success, srslte::unique_byte_buffer_t container) { - source_ho_proc.trigger(sourceenb_ho_proc_t::ho_prep_result{is_success, std::move(container)}); + if (not is_success) { + log_h->info("Received S1AP HandoverFailure. Aborting Handover...\n"); + trigger(srslte::failure_ev{}); + return; + } + trigger(container); } bool rrc::ue::rrc_mobility::update_ue_var_meas_cfg(const asn1::rrc::meas_cfg_s& source_meas_cfg, @@ -725,6 +741,52 @@ bool rrc::ue::rrc_mobility::update_ue_var_meas_cfg(const var_meas_cfg_t& source return meas_cfg_present; } +void rrc::ue::rrc_mobility::fill_mobility_reconf_common(asn1::rrc::dl_dcch_msg_s& msg, + const cell_info_common& target_cell) +{ + auto& recfg = msg.msg.set_c1().set_rrc_conn_recfg(); + recfg.rrc_transaction_id = rrc_ue->transaction_id; + rrc_ue->transaction_id = (rrc_ue->transaction_id + 1) % 4; + auto& recfg_r8 = recfg.crit_exts.set_c1().set_rrc_conn_recfg_r8(); + + // Pack MobilityControlInfo message with params of target Cell + recfg_r8.mob_ctrl_info_present = true; + auto& mob_info = recfg_r8.mob_ctrl_info; + mob_info.target_pci = target_cell.cell_cfg.pci; + mob_info.t304.value = mob_ctrl_info_s::t304_opts::ms2000; // TODO: make it reconfigurable + mob_info.new_ue_id.from_number(rrc_ue->rnti); + mob_info.rr_cfg_common.pusch_cfg_common = target_cell.sib2.rr_cfg_common.pusch_cfg_common; + mob_info.rr_cfg_common.prach_cfg.root_seq_idx = target_cell.sib2.rr_cfg_common.prach_cfg.root_seq_idx; + mob_info.rr_cfg_common.ul_cp_len = target_cell.sib2.rr_cfg_common.ul_cp_len; + mob_info.rr_cfg_common.p_max_present = true; + mob_info.rr_cfg_common.p_max = rrc_enb->cfg.sib1.p_max; + mob_info.carrier_freq_present = false; // same frequency handover for now + + // Set security cfg + recfg_r8.security_cfg_ho_present = true; + auto& intralte = recfg_r8.security_cfg_ho.handov_type.set_intra_lte(); + intralte.security_algorithm_cfg_present = false; + intralte.key_change_ind = false; + intralte.next_hop_chaining_count = 0; + + recfg_r8.rr_cfg_ded_present = true; + recfg_r8.rr_cfg_ded.phys_cfg_ded_present = true; + + // Allocate SR in new CC + recfg_r8.rr_cfg_ded.phys_cfg_ded.sched_request_cfg_present = true; + auto& sr_setup = recfg_r8.rr_cfg_ded.phys_cfg_ded.sched_request_cfg.set_setup(); + sr_setup.dsr_trans_max = rrc_enb->cfg.sr_cfg.dsr_max; + // TODO: For intra-freq handover, SR resources do not get updated. Update for inter-freq case + sr_setup.sr_cfg_idx = rrc_ue->cell_ded_list.get_sr_res()->sr_I; + sr_setup.sr_pucch_res_idx = rrc_ue->cell_ded_list.get_sr_res()->sr_N_pucch; + + // Antenna info - start at TM1 + recfg_r8.rr_cfg_ded.phys_cfg_ded.ant_info_present = true; + auto& ant_info = recfg_r8.rr_cfg_ded.phys_cfg_ded.ant_info.set_explicit_value(); + ant_info.tx_mode.value = ant_info_ded_s::tx_mode_e_::tm1; + ant_info.ue_tx_ant_sel.set(setup_e::release); +} + /** * TS 36.413, Section 8.4.6 - eNB Status Transfer * Description: Send "eNBStatusTransfer" message from source eNB to MME @@ -750,60 +812,67 @@ bool rrc::ue::rrc_mobility::start_enb_status_transfer() return rrc_enb->s1ap->send_enb_status_transfer_proc(rrc_ue->rnti, s1ap_bearers); } -/************************************************************************************************* - * sourceenb_ho_proc_t class - ************************************************************************************************/ +/************************************* + * rrc_mobility FSM methods + *************************************/ -rrc::ue::rrc_mobility::sourceenb_ho_proc_t::sourceenb_ho_proc_t(rrc_mobility* ue_mobility_) : parent(ue_mobility_) {} - -srslte::proc_outcome_t rrc::ue::rrc_mobility::sourceenb_ho_proc_t::init(const meas_id_to_add_mod_s& measid_, - const meas_obj_to_add_mod_s& measobj_, - const report_cfg_to_add_mod_s& repcfg_, - const cells_to_add_mod_s& cell_, - const meas_result_eutra_s& meas_res_, - uint32_t target_eci_) +bool rrc::ue::rrc_mobility::needs_s1_ho(idle_st& s, const ho_meas_report_ev& meas_result) const { - measid = &measid_; - measobj = &measobj_; - repcfg = &repcfg_; - cell = &cell_; - meas_res = meas_res_; - target_eci = target_eci_; - - // TODO: Check X2 is available first. If fail, go for S1. - // NOTE: For now only S1-HO is supported. X2 also not available for fwd direct path - ho_interface = ho_interface_t::S1; - fwd_direct_path_available = false; - - state = state_t::ho_preparation; - procInfo("Started Handover of rnti=0x%x to %s.\n", parent->rrc_ue->rnti, rrc_details::to_string(*cell).c_str()); - if (not parent->start_ho_preparation(target_eci, measobj->meas_obj_id, fwd_direct_path_available)) { - procError("Failed to send HO Required to MME.\n"); - return srslte::proc_outcome_t::error; + if (rrc_ue->get_state() != RRC_STATE_REGISTERED) { + return false; } - return srslte::proc_outcome_t::yield; + return rrc_details::eci_to_enbid(meas_result.target_eci) != rrc_enb->cfg.enb_id; } -srslte::proc_outcome_t rrc::ue::rrc_mobility::sourceenb_ho_proc_t::react(ho_prep_result e) +bool rrc::ue::rrc_mobility::needs_intraenb_ho(idle_st& s, const ho_meas_report_ev& meas_result) const { - if (not e.is_success) { - procError("Failure during handover preparation.\n"); - return srslte::proc_outcome_t::error; + if (rrc_ue->get_state() != RRC_STATE_REGISTERED) { + return false; } + if (rrc_details::eci_to_enbid(meas_result.target_eci) != rrc_enb->cfg.enb_id) { + return false; + } + uint32_t cell_id = rrc_details::eci_to_cellid(meas_result.target_eci); + return rrc_ue->get_ue_cc_cfg(UE_PCELL_CC_IDX)->cell_cfg.cell_id != cell_id; +} +void rrc::ue::rrc_mobility::handle_s1_meas_report(idle_st& s, s1_source_ho_st& d, const ho_meas_report_ev& meas_report) +{ + Info("Starting S1 Handover of rnti=0x%x to 0x%x.\n", rrc_ue->rnti, meas_report.target_eci); + d.report = meas_report; +} + +/************************************* + * s1_source_ho subFSM methods + *************************************/ + +void rrc::ue::rrc_mobility::s1_source_ho_st::wait_ho_req_ack_st::enter(s1_source_ho_st* f) +{ + bool success = f->parent_fsm()->start_ho_preparation(f->report.target_eci, f->report.meas_obj->meas_obj_id, false); + if (not success) { + f->trigger(srslte::failure_ev{}); + } +} + +void rrc::ue::rrc_mobility::s1_source_ho_st::handle_ho_cmd(wait_ho_req_ack_st& s, + status_transfer_st& d, + const srslte::unique_byte_buffer_t& container) +{ + d.is_ho_cmd_sent = false; /* unpack RRC HOCmd struct and perform sanity checks */ asn1::rrc::ho_cmd_s rrchocmd; { - asn1::cbit_ref bref(e.rrc_container->msg, e.rrc_container->N_bytes); + asn1::cbit_ref bref(container->msg, container->N_bytes); if (rrchocmd.unpack(bref) != asn1::SRSASN_SUCCESS) { - procError("Unpacking of RRC HOCommand was unsuccessful\n"); - parent->rrc_log->error_hex(e.rrc_container->msg, e.rrc_container->N_bytes, "Received container:\n"); - return srslte::proc_outcome_t::error; + log_h->warning("Unpacking of RRC HOCommand was unsuccessful\n"); + log_h->warning_hex(container->msg, container->N_bytes, "Received container:\n"); + return; } } if (rrchocmd.crit_exts.type().value != c1_or_crit_ext_opts::c1 or rrchocmd.crit_exts.c1().type().value != ho_cmd_s::crit_exts_c_::c1_c_::types_opts::ho_cmd_r8) { - procError("Only handling r8 Handover Commands\n"); + log_h->warning("Only handling r8 Handover Commands\n"); + return; } /* unpack DL-DCCH message containing the RRCRonnectionReconf (with MobilityInfo) to be sent to the UE */ @@ -812,34 +881,120 @@ srslte::proc_outcome_t rrc::ue::rrc_mobility::sourceenb_ho_proc_t::react(ho_prep asn1::cbit_ref bref(&rrchocmd.crit_exts.c1().ho_cmd_r8().ho_cmd_msg[0], rrchocmd.crit_exts.c1().ho_cmd_r8().ho_cmd_msg.size()); if (dl_dcch_msg.unpack(bref) != asn1::SRSASN_SUCCESS) { - procError("Unpacking of RRC DL-DCCH message with HO Command was unsuccessful.\n"); - return srslte::proc_outcome_t::error; + log_h->warning("Unpacking of RRC DL-DCCH message with HO Command was unsuccessful.\n"); + return; } } if (dl_dcch_msg.msg.type().value != dl_dcch_msg_type_c::types_opts::c1 or dl_dcch_msg.msg.c1().type().value != dl_dcch_msg_type_c::c1_c_::types_opts::rrc_conn_recfg) { - procError("HandoverCommand is expected to contain an RRC Connection Reconf message inside\n"); - return srslte::proc_outcome_t::error; + log_h->warning("HandoverCommand is expected to contain an RRC Connection Reconf message inside\n"); + return; } asn1::rrc::rrc_conn_recfg_s& reconf = dl_dcch_msg.msg.c1().rrc_conn_recfg(); if (not reconf.crit_exts.c1().rrc_conn_recfg_r8().mob_ctrl_info_present) { - procWarning("HandoverCommand is expected to have mobility control subfield\n"); - return srslte::proc_outcome_t::error; + log_h->warning("HandoverCommand is expected to have mobility control subfield\n"); + return; } - // TODO: Do anything with MeasCfg info within the Msg (e.g. update ue_var_meas)? - /* Send HO Command to UE */ - parent->rrc_ue->send_dl_dcch(&dl_dcch_msg); - procInfo("HandoverCommand of rnti=0x%x handled successfully.\n", parent->rrc_ue->rnti); - state = state_t::ho_execution; - - /* Start S1AP eNBStatusTransfer Procedure */ - if (not parent->start_enb_status_transfer()) { - return srslte::proc_outcome_t::error; + if (not parent_fsm()->rrc_ue->send_dl_dcch(&dl_dcch_msg)) { + return; } - return srslte::proc_outcome_t::success; + d.is_ho_cmd_sent = true; + log_h->info("HandoverCommand of rnti=0x%x handled successfully.\n", parent_fsm()->rrc_ue->rnti); +} + +void rrc::ue::rrc_mobility::s1_source_ho_st::status_transfer_st::enter(s1_source_ho_st* f) +{ + if (not is_ho_cmd_sent) { + f->trigger(srslte::failure_ev{}); + } + // TODO: Do anything with MeasCfg info within the Msg (e.g. update ue_var_meas)? + + /* Start S1AP eNBStatusTransfer Procedure */ + if (not f->parent_fsm()->start_enb_status_transfer()) { + f->trigger(srslte::failure_ev{}); + } +} + +/************************************************************************************************* + * intraENB Handover sub-FSM + ************************************************************************************************/ + +void rrc::ue::rrc_mobility::handle_intraenb_meas_report(idle_st& s, + intraenb_ho_st& d, + const ho_meas_report_ev& meas_report) +{ + uint32_t cell_id = rrc_details::eci_to_cellid(meas_report.target_eci); + d.target_cell = rrc_enb->cell_common_list->get_cell_id(cell_id); + d.source_cell_ctxt = rrc_ue->cell_ded_list.get_ue_cc_idx(UE_PCELL_CC_IDX); + if (d.target_cell == nullptr) { + rrc_log->error("The target cell_id=0x%x was not found in the list of eNB cells\n", cell_id); + return; + } + + Info("Starting intraeNB Handover of rnti=0x%x to 0x%x.\n", rrc_ue->rnti, meas_report.target_eci); +} + +void rrc::ue::rrc_mobility::intraenb_ho_st::enter(rrc_mobility* f) +{ + if (target_cell == nullptr) { + f->trigger(srslte::failure_ev{}); + return; + } + + /* Allocate Resources in Target Cell */ + // NOTE: for intra-eNB Handover only CQI resources will change + if (not f->rrc_ue->cell_ded_list.set_cells({target_cell->enb_cc_idx})) { + f->trigger(srslte::failure_ev{}); + return; + } + + /* Freeze all DRBs. SRBs are needed for sending the HO Cmd */ + for (const drb_to_add_mod_s& drb : f->rrc_ue->bearer_list.established_drbs()) { + f->rrc_enb->pdcp->del_bearer(f->rrc_ue->rnti, drb.drb_id + 2); + f->rrc_enb->mac->bearer_ue_rem(f->rrc_ue->rnti, drb.drb_id + 2); + } + + /* Prepare RRC Reconf Message with mobility info */ + dl_dcch_msg_s dl_dcch_msg; + f->fill_mobility_reconf_common(dl_dcch_msg, *target_cell); + auto& recfg_r8 = dl_dcch_msg.msg.c1().rrc_conn_recfg().crit_exts.c1().rrc_conn_recfg_r8(); + + // Add MeasConfig of target cell + auto prev_meas_var = f->ue_var_meas; + recfg_r8.meas_cfg_present = f->update_ue_var_meas_cfg(*f->ue_var_meas, target_cell->enb_cc_idx, &recfg_r8.meas_cfg); + + // Send DL-DCCH Message via current PCell + if (not f->rrc_ue->send_dl_dcch(&dl_dcch_msg)) { + f->trigger(srslte::failure_ev{}); + return; + } +} + +void rrc::ue::rrc_mobility::handle_crnti_ce(intraenb_ho_st& s, idle_st& d, const user_crnti_upd_ev& ev) +{ + rrc_log->info("UE performing handover updated its temp-crnti=0x%x to rnti=0x%x\n", ev.temp_crnti, ev.crnti); + + // Need to reset SNs of bearers. + rrc_enb->rlc->rem_user(rrc_ue->rnti); + rrc_enb->pdcp->rem_user(rrc_ue->rnti); + rrc_enb->rlc->add_user(rrc_ue->rnti); + rrc_enb->pdcp->add_user(rrc_ue->rnti); + + // Change PCell in MAC/Scheduler + rrc_ue->current_sched_ue_cfg.supported_cc_list[0].active = true; + rrc_ue->current_sched_ue_cfg.supported_cc_list[0].enb_cc_idx = s.target_cell->enb_cc_idx; + rrc_ue->apply_setup_phy_common(s.target_cell->sib2.rr_cfg_common); + rrc_enb->mac->ue_set_crnti(ev.temp_crnti, ev.crnti, &rrc_ue->current_sched_ue_cfg); + + rrc_ue->ue_security_cfg.regenerate_keys_handover(s.target_cell->cell_cfg.pci, s.target_cell->cell_cfg.dl_earfcn); + rrc_ue->bearer_list.reest_bearers(); + rrc_ue->bearer_list.apply_rlc_bearer_updates(rrc_enb->rlc); + rrc_ue->bearer_list.apply_pdcp_bearer_updates(rrc_enb->pdcp, rrc_ue->ue_security_cfg); + + rrc_log->info("new rnti=0x%x PCell is %d\n", ev.crnti, s.target_cell->enb_cc_idx); } } // namespace srsenb diff --git a/srsenb/test/upper/rrc_mobility_test.cc b/srsenb/test/upper/rrc_mobility_test.cc index ba516d9a9..6a98bd0a4 100644 --- a/srsenb/test/upper/rrc_mobility_test.cc +++ b/srsenb/test/upper/rrc_mobility_test.cc @@ -434,6 +434,64 @@ int test_s1ap_mobility(mobility_test_params test_params) return SRSLTE_SUCCESS; } +int test_intraenb_mobility(mobility_test_params test_params) +{ + printf("\n===== TEST: test_intraenb_mobility() for event %s =====\n", test_params.to_string()); + intraenb_mobility_tester tester{test_params}; + srslte::unique_byte_buffer_t pdu; + + TESTASSERT(tester.generate_rrc_cfg() == SRSLTE_SUCCESS); + TESTASSERT(tester.setup_rrc() == SRSLTE_SUCCESS); + TESTASSERT(tester.run_preamble() == SRSLTE_SUCCESS); + tester.pdcp.last_sdu.sdu = nullptr; + + /* Receive MeasReport from UE (correct if PCI=2) */ + if (test_params.fail_at == mobility_test_params::test_fail_at::wrong_measreport) { + uint8_t meas_report[] = {0x08, 0x10, 0x38, 0x74, 0x00, 0x0D, 0xBC, 0x80}; // PCI == 3 + test_helpers::copy_msg_to_buffer(pdu, meas_report, sizeof(meas_report)); + } else { + uint8_t meas_report[] = {0x08, 0x10, 0x38, 0x74, 0x00, 0x09, 0xBC, 0x80}; // PCI == 2 + test_helpers::copy_msg_to_buffer(pdu, meas_report, sizeof(meas_report)); + } + tester.rrc.write_pdu(tester.rnti, 1, std::move(pdu)); + tester.tic(); + TESTASSERT(tester.s1ap.last_ho_required.rrc_container == nullptr); + + /* Test Case: the MeasReport is not valid */ + if (test_params.fail_at == mobility_test_params::test_fail_at::wrong_measreport) { + TESTASSERT(tester.rrc_log->warn_counter == 1); + TESTASSERT(tester.pdcp.last_sdu.sdu == nullptr); + return SRSLTE_SUCCESS; + } + TESTASSERT(tester.pdcp.last_sdu.sdu != nullptr); + TESTASSERT(tester.s1ap.last_ho_required.rrc_container == nullptr); + TESTASSERT(not tester.s1ap.last_enb_status.status_present); + + /* Test Case: Multiple concurrent MeasReports arrived. Only one HO procedure should be running */ + if (test_params.fail_at == mobility_test_params::test_fail_at::concurrent_ho) { + tester.pdcp.last_sdu = {}; + uint8_t meas_report[] = {0x08, 0x10, 0x38, 0x74, 0x00, 0x09, 0xBC, 0x80}; // PCI == 2 + test_helpers::copy_msg_to_buffer(pdu, meas_report, sizeof(meas_report)); + tester.rrc.write_pdu(tester.rnti, 1, std::move(pdu)); + tester.tic(); + TESTASSERT(tester.pdcp.last_sdu.sdu == nullptr); + return SRSLTE_SUCCESS; + } + + /* Test Case: the HandoverCommand was sent to the lower layers */ + TESTASSERT(tester.rrc_log->error_counter == 0); + TESTASSERT(tester.pdcp.last_sdu.rnti == tester.rnti); + TESTASSERT(tester.pdcp.last_sdu.lcid == 1); // SRB1 + asn1::rrc::dl_dcch_msg_s ho_cmd; + TESTASSERT(test_helpers::unpack_asn1(ho_cmd, tester.pdcp.last_sdu.sdu)); + auto& recfg_r8 = ho_cmd.msg.c1().rrc_conn_recfg().crit_exts.c1().rrc_conn_recfg_r8(); + TESTASSERT(recfg_r8.mob_ctrl_info_present); + TESTASSERT(recfg_r8.mob_ctrl_info.new_ue_id.to_number() == tester.rnti); + TESTASSERT(recfg_r8.mob_ctrl_info.target_pci == 2); + + return SRSLTE_SUCCESS; +} + int main(int argc, char** argv) { srslte::logmap::set_default_log_level(srslte::LOG_LEVEL_INFO); @@ -453,6 +511,11 @@ int main(int argc, char** argv) TESTASSERT(test_s1ap_mobility(mobility_test_params{fail_at::ho_prep_failure}) == 0); TESTASSERT(test_s1ap_mobility(mobility_test_params{fail_at::success}) == 0); + // intraeNB Handover + TESTASSERT(test_intraenb_mobility(mobility_test_params{fail_at::wrong_measreport}) == 0); + TESTASSERT(test_intraenb_mobility(mobility_test_params{fail_at::concurrent_ho}) == 0); + TESTASSERT(test_intraenb_mobility(mobility_test_params{fail_at::success}) == 0); + printf("\nSuccess\n"); return SRSLTE_SUCCESS;