/* * Copyright 2013-2020 Software Radio Systems Limited * * This file is part of srsLTE. * * srsLTE is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * srsLTE is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * A copy of the GNU Affero General Public License can be found in * the LICENSE file in the top-level directory of this distribution * and at http://www.gnu.org/licenses/. * */ #include "srsenb/hdr/stack/rrc/rrc_ue.h" #include "srsenb/hdr/stack/rrc/mac_controller.h" #include "srsenb/hdr/stack/rrc/rrc_mobility.h" #include "srslte/asn1/rrc_asn1_utils.h" #include "srslte/common/int_helpers.h" using namespace asn1::rrc; namespace srsenb { /******************************************************************************* UE class Every function in UE class is called from a mutex environment thus does not need extra protection. *******************************************************************************/ rrc::ue::ue(rrc* outer_rrc, uint16_t rnti_, const sched_interface::ue_cfg_t& sched_ue_cfg) : parent(outer_rrc), rnti(rnti_), pool(srslte::byte_buffer_pool::get_instance()), phy_rrc_dedicated_list(sched_ue_cfg.supported_cc_list.size()), cell_ded_list(parent->cfg, *outer_rrc->pucch_res_list, *outer_rrc->cell_common_list), bearer_list(rnti_, parent->cfg), ue_security_cfg(parent->cfg) { mac_ctrl.reset(new mac_controller{this, sched_ue_cfg}); activity_timer = outer_rrc->task_sched.get_unique_timer(); set_activity_timeout(MSG3_RX_TIMEOUT); // next UE response is Msg3 // Configure apply_setup_phy_common(parent->cfg.sibs[1].sib2().rr_cfg_common); // Allocate cell and PUCCH resources if (cell_ded_list.add_cell(sched_ue_cfg.supported_cc_list[0].enb_cc_idx) == nullptr) { return; } mobility_handler.reset(new rrc_mobility(this)); } rrc::ue::~ue() {} rrc_state_t rrc::ue::get_state() { return state; } void rrc::ue::set_activity() { // re-start activity timer with current timeout value activity_timer.run(); if (parent && parent->rrc_log) { parent->rrc_log->debug("Activity registered for rnti=0x%x (timeout_value=%dms)\n", rnti, activity_timer.duration()); } } void rrc::ue::activity_timer_expired() { if (parent) { if (parent->rrc_log) { parent->rrc_log->warning( "Activity timer for rnti=0x%x expired after %d ms\n", rnti, activity_timer.time_elapsed()); } if (parent->s1ap->user_exists(rnti)) { parent->s1ap->user_release(rnti, asn1::s1ap::cause_radio_network_opts::user_inactivity); } else { if (rnti != SRSLTE_MRNTI) { parent->rem_user_thread(rnti); } } } state = RRC_STATE_RELEASE_REQUEST; } void rrc::ue::set_activity_timeout(const activity_timeout_type_t type) { uint32_t deadline_s = 0; uint32_t deadline_ms = 0; switch (type) { case MSG3_RX_TIMEOUT: deadline_s = 0; deadline_ms = static_cast( (get_ue_cc_cfg(UE_PCELL_CC_IDX)->sib2.rr_cfg_common.rach_cfg_common.max_harq_msg3_tx + 1) * 16); break; case UE_INACTIVITY_TIMEOUT: deadline_s = parent->cfg.inactivity_timeout_ms / 1000; deadline_ms = parent->cfg.inactivity_timeout_ms % 1000; break; default: parent->rrc_log->error("Unknown timeout type %d", type); } uint32_t deadline = deadline_s * 1e3 + deadline_ms; activity_timer.set(deadline, [this](uint32_t tid) { activity_timer_expired(); }); parent->rrc_log->debug("Setting timer for %s for rnti=0x%x to %dms\n", to_string(type).c_str(), rnti, deadline); set_activity(); } bool rrc::ue::is_connected() { return state == RRC_STATE_REGISTERED; } bool rrc::ue::is_idle() { return state == RRC_STATE_IDLE; } void rrc::ue::parse_ul_dcch(uint32_t lcid, srslte::unique_byte_buffer_t pdu) { set_activity(); ul_dcch_msg_s ul_dcch_msg; asn1::cbit_ref bref(pdu->msg, pdu->N_bytes); if (ul_dcch_msg.unpack(bref) != asn1::SRSASN_SUCCESS or ul_dcch_msg.msg.type().value != ul_dcch_msg_type_c::types_opts::c1) { parent->rrc_log->error("Failed to unpack UL-DCCH message\n"); return; } parent->log_rrc_message( srsenb::to_string((rb_id_t)lcid), Rx, pdu.get(), ul_dcch_msg, ul_dcch_msg.msg.c1().type().to_string()); // reuse PDU pdu->clear(); // TODO: name collision with byte_buffer reset transaction_id = 0; switch (ul_dcch_msg.msg.c1().type()) { case ul_dcch_msg_type_c::c1_c_::types::rrc_conn_setup_complete: handle_rrc_con_setup_complete(&ul_dcch_msg.msg.c1().rrc_conn_setup_complete(), std::move(pdu)); break; case ul_dcch_msg_type_c::c1_c_::types::rrc_conn_reest_complete: handle_rrc_con_reest_complete(&ul_dcch_msg.msg.c1().rrc_conn_reest_complete(), std::move(pdu)); break; case ul_dcch_msg_type_c::c1_c_::types::ul_info_transfer: pdu->N_bytes = ul_dcch_msg.msg.c1() .ul_info_transfer() .crit_exts.c1() .ul_info_transfer_r8() .ded_info_type.ded_info_nas() .size(); memcpy(pdu->msg, ul_dcch_msg.msg.c1() .ul_info_transfer() .crit_exts.c1() .ul_info_transfer_r8() .ded_info_type.ded_info_nas() .data(), pdu->N_bytes); parent->s1ap->write_pdu(rnti, std::move(pdu)); break; case ul_dcch_msg_type_c::c1_c_::types::rrc_conn_recfg_complete: handle_rrc_reconf_complete(&ul_dcch_msg.msg.c1().rrc_conn_recfg_complete(), std::move(pdu)); srslte::out_stream("User 0x%x connected\n", rnti); state = RRC_STATE_REGISTERED; set_activity_timeout(UE_INACTIVITY_TIMEOUT); break; case ul_dcch_msg_type_c::c1_c_::types::security_mode_complete: handle_security_mode_complete(&ul_dcch_msg.msg.c1().security_mode_complete()); send_ue_cap_enquiry(); state = RRC_STATE_WAIT_FOR_UE_CAP_INFO; break; case ul_dcch_msg_type_c::c1_c_::types::security_mode_fail: handle_security_mode_failure(&ul_dcch_msg.msg.c1().security_mode_fail()); break; case ul_dcch_msg_type_c::c1_c_::types::ue_cap_info: if (handle_ue_cap_info(&ul_dcch_msg.msg.c1().ue_cap_info())) { notify_s1ap_ue_ctxt_setup_complete(); send_connection_reconf(std::move(pdu)); state = RRC_STATE_WAIT_FOR_CON_RECONF_COMPLETE; } else { send_connection_reject(); state = RRC_STATE_IDLE; } break; case ul_dcch_msg_type_c::c1_c_::types::meas_report: if (mobility_handler != nullptr) { mobility_handler->handle_ue_meas_report(ul_dcch_msg.msg.c1().meas_report()); } else { parent->rrc_log->warning("Received MeasReport but no mobility configuration is available\n"); } break; default: parent->rrc_log->error("Msg: %s not supported\n", ul_dcch_msg.msg.c1().type().to_string().c_str()); break; } } std::string rrc::ue::to_string(const activity_timeout_type_t& type) { constexpr static const char* options[] = {"Msg3 reception", "UE response reception", "UE inactivity"}; return srslte::enum_to_text(options, (uint32_t)activity_timeout_type_t::nulltype, (uint32_t)type); } /* * Connection Setup */ void rrc::ue::handle_rrc_con_req(rrc_conn_request_s* msg) { if (not parent->s1ap->is_mme_connected()) { parent->rrc_log->error("MME isn't connected. Sending Connection Reject\n"); send_connection_reject(); return; } rrc_conn_request_r8_ies_s* msg_r8 = &msg->crit_exts.rrc_conn_request_r8(); if (msg_r8->ue_id.type() == init_ue_id_c::types::s_tmsi) { mmec = (uint8_t)msg_r8->ue_id.s_tmsi().mmec.to_number(); m_tmsi = (uint32_t)msg_r8->ue_id.s_tmsi().m_tmsi.to_number(); has_tmsi = true; } establishment_cause = msg_r8->establishment_cause; send_connection_setup(); state = RRC_STATE_WAIT_FOR_CON_SETUP_COMPLETE; set_activity_timeout(UE_INACTIVITY_TIMEOUT); } void rrc::ue::send_connection_setup() { // (Re-)Establish SRB1 bearer_list.add_srb(1); dl_ccch_msg_s dl_ccch_msg; dl_ccch_msg.msg.set_c1(); dl_ccch_msg.msg.c1().set_rrc_conn_setup(); dl_ccch_msg.msg.c1().rrc_conn_setup().rrc_transaction_id = (uint8_t)((transaction_id++) % 4); rrc_conn_setup_r8_ies_s& setup = dl_ccch_msg.msg.c1().rrc_conn_setup().crit_exts.set_c1().set_rrc_conn_setup_r8(); rr_cfg_ded_s* rr_cfg = &setup.rr_cfg_ded; // Fill RR config dedicated fill_rrc_setup_rr_config_dedicated(rr_cfg); phys_cfg_ded_s* phy_cfg = &rr_cfg->phys_cfg_ded; // Apply ConnectionSetup Configuration to MAC scheduler mac_ctrl->handle_con_setup(setup); // Add SRBs/DRBs, and configure RLC+PDCP apply_pdcp_srb_updates(); apply_pdcp_drb_updates(); apply_rlc_rb_updates(); // Configure PHY layer apply_setup_phy_config_dedicated(*phy_cfg); // It assumes SCell has not been set before send_dl_ccch(&dl_ccch_msg); } void rrc::ue::handle_rrc_con_setup_complete(rrc_conn_setup_complete_s* msg, srslte::unique_byte_buffer_t pdu) { // Inform PHY about the configuration completion parent->phy->complete_config(rnti); parent->rrc_log->info("RRCConnectionSetupComplete transaction ID: %d\n", msg->rrc_transaction_id); rrc_conn_setup_complete_r8_ies_s* msg_r8 = &msg->crit_exts.c1().rrc_conn_setup_complete_r8(); // TODO: msg->selected_plmn_id - used to select PLMN from SIB1 list // TODO: if(msg->registered_mme_present) - the indicated MME should be used from a pool pdu->N_bytes = msg_r8->ded_info_nas.size(); memcpy(pdu->msg, msg_r8->ded_info_nas.data(), pdu->N_bytes); // Flag completion of RadioResource Configuration bearer_list.rr_ded_cfg_complete(); // Signal MAC scheduler that configuration was successful mac_ctrl->handle_con_setup_complete(); asn1::s1ap::rrc_establishment_cause_e s1ap_cause; s1ap_cause.value = (asn1::s1ap::rrc_establishment_cause_opts::options)establishment_cause.value; if (has_tmsi) { parent->s1ap->initial_ue(rnti, s1ap_cause, std::move(pdu), m_tmsi, mmec); } else { parent->s1ap->initial_ue(rnti, s1ap_cause, std::move(pdu)); } state = RRC_STATE_WAIT_FOR_CON_RECONF_COMPLETE; } void rrc::ue::send_connection_reject() { mac_ctrl->handle_con_reject(); dl_ccch_msg_s dl_ccch_msg; dl_ccch_msg.msg.set_c1().set_rrc_conn_reject().crit_exts.set_c1().set_rrc_conn_reject_r8().wait_time = 10; send_dl_ccch(&dl_ccch_msg); } /* * Connection Reestablishment */ void rrc::ue::handle_rrc_con_reest_req(rrc_conn_reest_request_s* msg) { if (not parent->s1ap->is_mme_connected()) { parent->rrc_log->error("MME isn't connected. Sending Connection Reject\n"); send_connection_reject(); return; } parent->rrc_log->debug("rnti=0x%x, phyid=0x%x, smac=0x%x, cause=%s\n", (uint32_t)msg->crit_exts.rrc_conn_reest_request_r8().ue_id.c_rnti.to_number(), msg->crit_exts.rrc_conn_reest_request_r8().ue_id.pci, (uint32_t)msg->crit_exts.rrc_conn_reest_request_r8().ue_id.short_mac_i.to_number(), msg->crit_exts.rrc_conn_reest_request_r8().reest_cause.to_string().c_str()); if (is_idle()) { uint16_t old_rnti = msg->crit_exts.rrc_conn_reest_request_r8().ue_id.c_rnti.to_number(); uint16_t old_pci = msg->crit_exts.rrc_conn_reest_request_r8().ue_id.pci; const cell_info_common* old_cell = parent->cell_common_list->get_pci(old_pci); auto ue_it = parent->users.find(old_rnti); // Reject unrecognized rntis, and PCIs that do not belong to eNB if (ue_it != parent->users.end() and old_cell != nullptr and ue_it->second->cell_ded_list.get_enb_cc_idx(old_cell->enb_cc_idx) != nullptr) { parent->rrc_log->info("ConnectionReestablishmentRequest for rnti=0x%x. Sending Connection Reestablishment\n", old_rnti); send_connection_reest(parent->users[old_rnti]->ue_security_cfg.get_ncc()); // Cancel Handover in Target eNB if on-going parent->users[old_rnti]->mobility_handler->trigger(rrc_mobility::ho_cancel_ev{}); // Setup security const cell_info_common* pcell_cfg = get_ue_cc_cfg(UE_PCELL_CC_IDX); ue_security_cfg = parent->users[old_rnti]->ue_security_cfg; ue_security_cfg.regenerate_keys_handover(pcell_cfg->cell_cfg.pci, pcell_cfg->cell_cfg.dl_earfcn); // Get PDCP entity state (required when using RLC AM) for (const auto& erab_pair : parent->users[old_rnti]->bearer_list.get_erabs()) { uint16_t lcid = erab_pair.second.id - 2; old_reest_pdcp_state[lcid] = {}; parent->pdcp->get_bearer_state(old_rnti, lcid, &old_reest_pdcp_state[lcid]); parent->rrc_log->debug("Getting PDCP state for E-RAB with LCID %d\n", lcid); parent->rrc_log->debug("Got PDCP state: TX HFN %d, NEXT_PDCP_TX_SN %d, RX_HFN %d, NEXT_PDCP_RX_SN %d, " "LAST_SUBMITTED_PDCP_RX_SN %d\n", old_reest_pdcp_state[lcid].tx_hfn, old_reest_pdcp_state[lcid].next_pdcp_tx_sn, old_reest_pdcp_state[lcid].rx_hfn, old_reest_pdcp_state[lcid].next_pdcp_rx_sn, old_reest_pdcp_state[lcid].last_submitted_pdcp_rx_sn); } // Make sure UE capabilities are copied over to new RNTI eutra_capabilities = parent->users[old_rnti]->eutra_capabilities; old_reest_rnti = old_rnti; state = RRC_STATE_WAIT_FOR_CON_REEST_COMPLETE; set_activity_timeout(UE_INACTIVITY_TIMEOUT); } else { parent->rrc_log->error("Received ConnectionReestablishment for rnti=0x%x without context\n", old_rnti); send_connection_reest_rej(); } } else { parent->rrc_log->error("Received ReestablishmentRequest from an rnti=0x%x not in IDLE\n", rnti); } return; } void rrc::ue::send_connection_reest(uint8_t ncc) { // Re-Establish SRB1 bearer_list.add_srb(1); dl_ccch_msg_s dl_ccch_msg; dl_ccch_msg.msg.set_c1(); dl_ccch_msg.msg.c1().set_rrc_conn_reest(); dl_ccch_msg.msg.c1().rrc_conn_reest().rrc_transaction_id = (uint8_t)((transaction_id++) % 4); rrc_conn_reest_r8_ies_s& reest = dl_ccch_msg.msg.c1().rrc_conn_reest().crit_exts.set_c1().set_rrc_conn_reest_r8(); rr_cfg_ded_s* rr_cfg = &reest.rr_cfg_ded; // Fill RR config dedicated fill_rrc_setup_rr_config_dedicated(rr_cfg); phys_cfg_ded_s* phy_cfg = &rr_cfg->phys_cfg_ded; // Set NCC reest.next_hop_chaining_count = ncc; // Apply ConnectionReest Configuration to MAC scheduler mac_ctrl->handle_con_reest(reest); // Add SRBs/DRBs, and configure RLC+PDCP apply_pdcp_srb_updates(); apply_pdcp_drb_updates(); apply_rlc_rb_updates(); // Configure PHY layer apply_setup_phy_config_dedicated(*phy_cfg); // It assumes SCell has not been set before send_dl_ccch(&dl_ccch_msg); } void rrc::ue::handle_rrc_con_reest_complete(rrc_conn_reest_complete_s* msg, srslte::unique_byte_buffer_t pdu) { // Inform PHY about the configuration completion parent->phy->complete_config(rnti); parent->rrc_log->info("RRCConnectionReestablishComplete transaction ID: %d\n", msg->rrc_transaction_id); // TODO: msg->selected_plmn_id - used to select PLMN from SIB1 list // TODO: if(msg->registered_mme_present) - the indicated MME should be used from a pool // Modify GTP-U tunnel and S1AP context parent->gtpu->mod_bearer_rnti(old_reest_rnti, rnti); parent->s1ap->user_mod(old_reest_rnti, rnti); // Flag completion of RadioResource Configuration bearer_list.rr_ded_cfg_complete(); // Signal MAC scheduler that configuration was successful mac_ctrl->handle_con_reest_complete(); // Activate security for SRB1 parent->pdcp->config_security(rnti, RB_ID_SRB1, ue_security_cfg.get_as_sec_cfg()); parent->pdcp->enable_integrity(rnti, RB_ID_SRB1); parent->pdcp->enable_encryption(rnti, RB_ID_SRB1); // Reestablish current DRBs during ConnectionReconfiguration for (const auto& erab_pair : parent->users[old_reest_rnti]->bearer_list.get_erabs()) { const bearer_cfg_handler::erab_t& erab = erab_pair.second; bearer_list.add_erab(erab.id, erab.qos_params, erab.address, erab.teid_out, nullptr); } // remove old RNTI parent->rem_user_thread(old_reest_rnti); state = RRC_STATE_REESTABLISHMENT_COMPLETE; send_connection_reconf(std::move(pdu)); } void rrc::ue::send_connection_reest_rej() { mac_ctrl->handle_con_reject(); dl_ccch_msg_s dl_ccch_msg; dl_ccch_msg.msg.set_c1().set_rrc_conn_reest_reject().crit_exts.set_rrc_conn_reest_reject_r8(); send_dl_ccch(&dl_ccch_msg); } /* * Connection Reconfiguration */ void rrc::ue::send_connection_reconf(srslte::unique_byte_buffer_t pdu) { // Setup SRB2 bearer_list.add_srb(2); // Add re-establish DRBs parent->rrc_log->debug("RRC state %d\n", state); dl_dcch_msg_s dl_dcch_msg; dl_dcch_msg.msg.set_c1().set_rrc_conn_recfg().crit_exts.set_c1().set_rrc_conn_recfg_r8(); dl_dcch_msg.msg.c1().rrc_conn_recfg().rrc_transaction_id = (uint8_t)((transaction_id++) % 4); rrc_conn_recfg_r8_ies_s* conn_reconf = &dl_dcch_msg.msg.c1().rrc_conn_recfg().crit_exts.c1().rrc_conn_recfg_r8(); // Add DRBs/SRBs conn_reconf->rr_cfg_ded_present = bearer_list.fill_rr_cfg_ded(conn_reconf->rr_cfg_ded); conn_reconf->rr_cfg_ded.phys_cfg_ded_present = true; phys_cfg_ded_s* phy_cfg = &conn_reconf->rr_cfg_ded.phys_cfg_ded; // Configure PHY layer phy_cfg->ant_info_present = true; phy_cfg->ant_info.set_explicit_value() = parent->cfg.antenna_info; phy_cfg->cqi_report_cfg_present = true; if (parent->cfg.cqi_cfg.mode == RRC_CFG_CQI_MODE_APERIODIC) { phy_cfg->cqi_report_cfg.cqi_report_mode_aperiodic_present = true; if (phy_cfg->ant_info_present and phy_cfg->ant_info.explicit_value().tx_mode.value == ant_info_ded_s::tx_mode_e_::tm4) { phy_cfg->cqi_report_cfg.cqi_report_mode_aperiodic = cqi_report_mode_aperiodic_e::rm31; } else { phy_cfg->cqi_report_cfg.cqi_report_mode_aperiodic = cqi_report_mode_aperiodic_e::rm30; } } else { phy_cfg->cqi_report_cfg.cqi_report_periodic_present = true; auto& cqi_rep = phy_cfg->cqi_report_cfg.cqi_report_periodic.set_setup(); get_cqi(&cqi_rep.cqi_pmi_cfg_idx, &cqi_rep.cqi_pucch_res_idx, UE_PCELL_CC_IDX); cqi_rep.cqi_format_ind_periodic.set( cqi_report_periodic_c::setup_s_::cqi_format_ind_periodic_c_::types::wideband_cqi); cqi_rep.simul_ack_nack_and_cqi = parent->cfg.cqi_cfg.simultaneousAckCQI; if (phy_cfg->ant_info_present and ((phy_cfg->ant_info.explicit_value().tx_mode == ant_info_ded_s::tx_mode_e_::tm3) || (phy_cfg->ant_info.explicit_value().tx_mode == ant_info_ded_s::tx_mode_e_::tm4))) { uint16_t ri_idx = 0; if (get_ri(parent->cfg.cqi_cfg.m_ri, &ri_idx) == SRSLTE_SUCCESS) { phy_cfg->cqi_report_cfg.cqi_report_periodic.set_setup(); phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().ri_cfg_idx_present = true; phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().ri_cfg_idx = ri_idx; } else { srslte::out_stream("\nWarning: Configured wrong M_ri parameter.\n\n"); } } else { phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().ri_cfg_idx_present = false; } } phy_cfg->cqi_report_cfg.nom_pdsch_rs_epre_offset = 0; // PDSCH phy_cfg->pdsch_cfg_ded_present = true; phy_cfg->pdsch_cfg_ded.p_a = parent->cfg.pdsch_cfg; // Configure 256QAM if (ue_capabilities.category_dl >= 11 && ue_capabilities.support_dl_256qam) { phy_cfg->cqi_report_cfg_pcell_v1250.set_present(true); cqi_report_cfg_v1250_s* cqi_report_cfg = conn_reconf->rr_cfg_ded.phys_cfg_ded.cqi_report_cfg_pcell_v1250.get(); cqi_report_cfg->alt_cqi_table_r12_present = true; cqi_report_cfg->alt_cqi_table_r12 = asn1::rrc::cqi_report_cfg_v1250_s::alt_cqi_table_r12_e_::all_sfs; } // Add SCells if (fill_scell_to_addmod_list(conn_reconf) != SRSLTE_SUCCESS) { parent->rrc_log->warning("Could not create configuration for Scell\n"); return; } apply_reconf_phy_config(*conn_reconf); // setup SRB2/DRBs in PDCP and RLC apply_pdcp_srb_updates(); apply_pdcp_drb_updates(); apply_rlc_rb_updates(); // Add pending NAS info bearer_list.fill_pending_nas_info(conn_reconf); if (mobility_handler != nullptr) { mobility_handler->fill_conn_recfg_no_ho_cmd(conn_reconf); } last_rrc_conn_recfg = dl_dcch_msg.msg.c1().rrc_conn_recfg(); // Apply Reconf Msg configuration to MAC scheduler mac_ctrl->handle_con_reconf(*conn_reconf); // If reconf due to reestablishment, recover PDCP state if (state == RRC_STATE_REESTABLISHMENT_COMPLETE) { for (const auto& erab_pair : bearer_list.get_erabs()) { uint16_t lcid = erab_pair.second.id - 2; bool is_am = parent->cfg.qci_cfg[erab_pair.second.qos_params.qci].rlc_cfg.type().value == asn1::rrc::rlc_cfg_c::types_opts::am; if (is_am) { parent->rrc_log->debug("Set PDCP state: TX HFN %d, NEXT_PDCP_TX_SN %d, RX_HFN %d, NEXT_PDCP_RX_SN %d, " "LAST_SUBMITTED_PDCP_RX_SN %d\n", old_reest_pdcp_state[lcid].tx_hfn, old_reest_pdcp_state[lcid].next_pdcp_tx_sn, old_reest_pdcp_state[lcid].rx_hfn, old_reest_pdcp_state[lcid].next_pdcp_rx_sn, old_reest_pdcp_state[lcid].last_submitted_pdcp_rx_sn); parent->pdcp->set_bearer_state(rnti, lcid, old_reest_pdcp_state[lcid]); } } } // Reuse same PDU pdu->clear(); send_dl_dcch(&dl_dcch_msg, std::move(pdu)); state = RRC_STATE_WAIT_FOR_CON_RECONF_COMPLETE; } void rrc::ue::send_connection_reconf_upd(srslte::unique_byte_buffer_t pdu) { dl_dcch_msg_s dl_dcch_msg; rrc_conn_recfg_s* rrc_conn_recfg = &dl_dcch_msg.msg.set_c1().set_rrc_conn_recfg(); rrc_conn_recfg->rrc_transaction_id = (uint8_t)((transaction_id++) % 4); rrc_conn_recfg_r8_ies_s& reconfig_r8 = rrc_conn_recfg->crit_exts.set_c1().set_rrc_conn_recfg_r8(); reconfig_r8.rr_cfg_ded_present = true; rr_cfg_ded_s* rr_cfg = &reconfig_r8.rr_cfg_ded; rr_cfg->phys_cfg_ded_present = true; phys_cfg_ded_s* phy_cfg = &rr_cfg->phys_cfg_ded; phy_cfg->sched_request_cfg_present = true; phy_cfg->sched_request_cfg.set_setup(); phy_cfg->sched_request_cfg.setup().dsr_trans_max = parent->cfg.sr_cfg.dsr_max; phy_cfg->cqi_report_cfg_present = true; if (cell_ded_list.nof_cells() > 0) { phy_cfg->cqi_report_cfg.cqi_report_periodic_present = true; phy_cfg->cqi_report_cfg.cqi_report_periodic.set_setup().cqi_format_ind_periodic.set( cqi_report_periodic_c::setup_s_::cqi_format_ind_periodic_c_::types::wideband_cqi); get_cqi(&phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().cqi_pmi_cfg_idx, &phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().cqi_pucch_res_idx, UE_PCELL_CC_IDX); phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().simul_ack_nack_and_cqi = parent->cfg.cqi_cfg.simultaneousAckCQI; if (parent->cfg.antenna_info.tx_mode == ant_info_ded_s::tx_mode_e_::tm3 || parent->cfg.antenna_info.tx_mode == ant_info_ded_s::tx_mode_e_::tm4) { phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().ri_cfg_idx_present = true; phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().ri_cfg_idx = 483; /* TODO: HARDCODED! Add to UL scheduler */ } else { phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().ri_cfg_idx_present = false; } } else { phy_cfg->cqi_report_cfg.cqi_report_mode_aperiodic_present = true; if (phy_cfg->ant_info_present && parent->cfg.antenna_info.tx_mode == ant_info_ded_s::tx_mode_e_::tm4) { phy_cfg->cqi_report_cfg.cqi_report_mode_aperiodic = cqi_report_mode_aperiodic_e::rm31; } else { phy_cfg->cqi_report_cfg.cqi_report_mode_aperiodic = cqi_report_mode_aperiodic_e::rm30; } } apply_reconf_phy_config(reconfig_r8); phy_cfg->sched_request_cfg.setup().sr_cfg_idx = cell_ded_list.get_sr_res()->sr_I; phy_cfg->sched_request_cfg.setup().sr_pucch_res_idx = cell_ded_list.get_sr_res()->sr_N_pucch; // Apply Reconf Msg configuration to MAC scheduler mac_ctrl->handle_con_reconf(reconfig_r8); pdu->clear(); send_dl_dcch(&dl_dcch_msg, std::move(pdu)); state = RRC_STATE_WAIT_FOR_CON_RECONF_COMPLETE; } void rrc::ue::send_connection_reconf_new_bearer() { dl_dcch_msg_s dl_dcch_msg; dl_dcch_msg.msg.set_c1().set_rrc_conn_recfg().crit_exts.set_c1().set_rrc_conn_recfg_r8(); dl_dcch_msg.msg.c1().rrc_conn_recfg().rrc_transaction_id = (uint8_t)((transaction_id++) % 4); rrc_conn_recfg_r8_ies_s* conn_reconf = &dl_dcch_msg.msg.c1().rrc_conn_recfg().crit_exts.c1().rrc_conn_recfg_r8(); conn_reconf->rr_cfg_ded_present = bearer_list.fill_rr_cfg_ded(conn_reconf->rr_cfg_ded); // Setup new bearer apply_pdcp_srb_updates(); apply_pdcp_drb_updates(); apply_rlc_rb_updates(); // Add pending NAS info bearer_list.fill_pending_nas_info(conn_reconf); if (conn_reconf->rr_cfg_ded_present or conn_reconf->ded_info_nas_list_present) { send_dl_dcch(&dl_dcch_msg); } } void rrc::ue::handle_rrc_reconf_complete(rrc_conn_recfg_complete_s* msg, srslte::unique_byte_buffer_t pdu) { // Inform PHY about the configuration completion parent->phy->complete_config(rnti); if (last_rrc_conn_recfg.rrc_transaction_id == msg->rrc_transaction_id) { // Flag completion of RadioResource Configuration bearer_list.rr_ded_cfg_complete(); // Activate SCells and bearers in the MAC scheduler that were advertised in the RRC Reconf message mac_ctrl->handle_con_reconf_complete(); // If performing handover, signal its completion mobility_handler->trigger(*msg); } else { parent->rrc_log->error("Expected RRCReconfigurationComplete with transaction ID: %d, got %d\n", last_rrc_conn_recfg.rrc_transaction_id, msg->rrc_transaction_id); } } /* * Security Mode command */ void rrc::ue::send_security_mode_command() { // Setup SRB1 security/integrity. Encryption is set on completion parent->pdcp->config_security(rnti, RB_ID_SRB1, ue_security_cfg.get_as_sec_cfg()); parent->pdcp->enable_integrity(rnti, RB_ID_SRB1); dl_dcch_msg_s dl_dcch_msg; security_mode_cmd_s* comm = &dl_dcch_msg.msg.set_c1().set_security_mode_cmd(); comm->rrc_transaction_id = (uint8_t)((transaction_id++) % 4); comm->crit_exts.set_c1().set_security_mode_cmd_r8().security_cfg_smc.security_algorithm_cfg = ue_security_cfg.get_security_algorithm_cfg(); send_dl_dcch(&dl_dcch_msg); } void rrc::ue::handle_security_mode_complete(security_mode_complete_s* msg) { parent->rrc_log->info("SecurityModeComplete transaction ID: %d\n", msg->rrc_transaction_id); parent->pdcp->enable_encryption(rnti, RB_ID_SRB1); } void rrc::ue::handle_security_mode_failure(security_mode_fail_s* msg) { parent->rrc_log->info("SecurityModeFailure transaction ID: %d\n", msg->rrc_transaction_id); } /* * UE capabilities info */ void rrc::ue::send_ue_cap_enquiry() { dl_dcch_msg_s dl_dcch_msg; dl_dcch_msg.msg.set_c1().set_ue_cap_enquiry().crit_exts.set_c1().set_ue_cap_enquiry_r8(); ue_cap_enquiry_s* enq = &dl_dcch_msg.msg.c1().ue_cap_enquiry(); enq->rrc_transaction_id = (uint8_t)((transaction_id++) % 4); enq->crit_exts.c1().ue_cap_enquiry_r8().ue_cap_request.resize(1); enq->crit_exts.c1().ue_cap_enquiry_r8().ue_cap_request[0].value = rat_type_e::eutra; send_dl_dcch(&dl_dcch_msg); } bool rrc::ue::handle_ue_cap_info(ue_cap_info_s* msg) { parent->rrc_log->info("UECapabilityInformation transaction ID: %d\n", msg->rrc_transaction_id); ue_cap_info_r8_ies_s* msg_r8 = &msg->crit_exts.c1().ue_cap_info_r8(); for (uint32_t i = 0; i < msg_r8->ue_cap_rat_container_list.size(); i++) { if (msg_r8->ue_cap_rat_container_list[i].rat_type != rat_type_e::eutra) { parent->rrc_log->warning("Not handling UE capability information for RAT type %s\n", msg_r8->ue_cap_rat_container_list[i].rat_type.to_string().c_str()); } else { asn1::cbit_ref bref(msg_r8->ue_cap_rat_container_list[0].ue_cap_rat_container.data(), msg_r8->ue_cap_rat_container_list[0].ue_cap_rat_container.size()); if (eutra_capabilities.unpack(bref) != asn1::SRSASN_SUCCESS) { parent->rrc_log->error("Failed to unpack EUTRA capabilities message\n"); return false; } eutra_capabilities_unpacked = true; ue_capabilities = srslte::make_rrc_ue_capabilities(eutra_capabilities); parent->rrc_log->info("UE rnti: 0x%x category: %d\n", rnti, eutra_capabilities.ue_category); } } return true; // TODO: Add liblte_rrc support for unpacking UE cap info and repacking into // inter-node UERadioAccessCapabilityInformation (36.331 v10.0.0 Section 10.2.2). // This is then passed to S1AP for transfer to EPC. // parent->s1ap->ue_capabilities(rnti, &eutra_capabilities); } /* * Connection Release */ void rrc::ue::send_connection_release() { dl_dcch_msg_s dl_dcch_msg; auto& rrc_release = dl_dcch_msg.msg.set_c1().set_rrc_conn_release(); rrc_release.rrc_transaction_id = (uint8_t)((transaction_id++) % 4); rrc_conn_release_r8_ies_s& rel_ies = rrc_release.crit_exts.set_c1().set_rrc_conn_release_r8(); rel_ies.release_cause = release_cause_e::other; if (is_csfb) { if (parent->sib7.carrier_freqs_info_list.size() > 0) { rel_ies.redirected_carrier_info_present = true; rel_ies.redirected_carrier_info.set_geran(); rel_ies.redirected_carrier_info.geran() = parent->sib7.carrier_freqs_info_list[0].carrier_freqs; } else { rel_ies.redirected_carrier_info_present = false; } } send_dl_dcch(&dl_dcch_msg); } /* * UE context */ void rrc::ue::handle_ue_init_ctxt_setup_req(const asn1::s1ap::init_context_setup_request_s& msg) { if (msg.protocol_ies.add_cs_fallback_ind_present) { parent->rrc_log->warning("Not handling AdditionalCSFallbackIndicator\n"); } if (msg.protocol_ies.csg_membership_status_present) { parent->rrc_log->warning("Not handling CSGMembershipStatus\n"); } if (msg.protocol_ies.gummei_id_present) { parent->rrc_log->warning("Not handling GUMMEI_ID\n"); } if (msg.protocol_ies.ho_restrict_list_present) { parent->rrc_log->warning("Not handling HandoverRestrictionList\n"); } if (msg.protocol_ies.management_based_mdt_allowed_present) { parent->rrc_log->warning("Not handling ManagementBasedMDTAllowed\n"); } if (msg.protocol_ies.management_based_mdtplmn_list_present) { parent->rrc_log->warning("Not handling ManagementBasedMDTPLMNList\n"); } if (msg.protocol_ies.mme_ue_s1ap_id_minus2_present) { parent->rrc_log->warning("Not handling MME_UE_S1AP_ID_2\n"); } if (msg.protocol_ies.registered_lai_present) { parent->rrc_log->warning("Not handling RegisteredLAI\n"); } if (msg.protocol_ies.srvcc_operation_possible_present) { parent->rrc_log->warning("Not handling SRVCCOperationPossible\n"); } if (msg.protocol_ies.subscriber_profile_idfor_rfp_present) { parent->rrc_log->warning("Not handling SubscriberProfileIDforRFP\n"); } if (msg.protocol_ies.trace_activation_present) { parent->rrc_log->warning("Not handling TraceActivation\n"); } if (msg.protocol_ies.ue_radio_cap_present) { parent->rrc_log->warning("Not handling UERadioCapability\n"); } set_bitrates(msg.protocol_ies.ueaggregate_maximum_bitrate.value); ue_security_cfg.set_security_capabilities(msg.protocol_ies.ue_security_cap.value); ue_security_cfg.set_security_key(msg.protocol_ies.security_key.value); // CSFB if (msg.protocol_ies.cs_fallback_ind_present) { if (msg.protocol_ies.cs_fallback_ind.value.value == asn1::s1ap::cs_fallback_ind_opts::cs_fallback_required or msg.protocol_ies.cs_fallback_ind.value.value == asn1::s1ap::cs_fallback_ind_opts::cs_fallback_high_prio) { is_csfb = true; } } // Send RRC security mode command send_security_mode_command(); // Setup E-RABs setup_erabs(msg.protocol_ies.erab_to_be_setup_list_ctxt_su_req.value); } bool rrc::ue::handle_ue_ctxt_mod_req(const asn1::s1ap::ue_context_mod_request_s& msg) { if (msg.protocol_ies.cs_fallback_ind_present) { if (msg.protocol_ies.cs_fallback_ind.value.value == asn1::s1ap::cs_fallback_ind_opts::cs_fallback_required || msg.protocol_ies.cs_fallback_ind.value.value == asn1::s1ap::cs_fallback_ind_opts::cs_fallback_high_prio) { /* Remember that we are in a CSFB right now */ is_csfb = true; } } if (msg.protocol_ies.add_cs_fallback_ind_present) { parent->rrc_log->warning("Not handling AdditionalCSFallbackIndicator\n"); } if (msg.protocol_ies.csg_membership_status_present) { parent->rrc_log->warning("Not handling CSGMembershipStatus\n"); } if (msg.protocol_ies.registered_lai_present) { parent->rrc_log->warning("Not handling RegisteredLAI\n"); } if (msg.protocol_ies.subscriber_profile_idfor_rfp_present) { parent->rrc_log->warning("Not handling SubscriberProfileIDforRFP\n"); } // UEAggregateMaximumBitrate if (msg.protocol_ies.ueaggregate_maximum_bitrate_present) { set_bitrates(msg.protocol_ies.ueaggregate_maximum_bitrate.value); } if (msg.protocol_ies.ue_security_cap_present) { ue_security_cfg.set_security_capabilities(msg.protocol_ies.ue_security_cap.value); } if (msg.protocol_ies.security_key_present) { ue_security_cfg.set_security_key(msg.protocol_ies.security_key.value); send_security_mode_command(); } return true; } void rrc::ue::notify_s1ap_ue_ctxt_setup_complete() { asn1::s1ap::init_context_setup_resp_s res; res.protocol_ies.erab_setup_list_ctxt_su_res.value.resize(bearer_list.get_erabs().size()); uint32_t i = 0; for (const auto& erab : bearer_list.get_erabs()) { res.protocol_ies.erab_setup_list_ctxt_su_res.value[i].load_info_obj(ASN1_S1AP_ID_ERAB_SETUP_ITEM_CTXT_SU_RES); auto& item = res.protocol_ies.erab_setup_list_ctxt_su_res.value[i].value.erab_setup_item_ctxt_su_res(); item.erab_id = erab.second.id; srslte::uint32_to_uint8(erab.second.teid_in, item.gtp_teid.data()); i++; } parent->s1ap->ue_ctxt_setup_complete(rnti, res); } void rrc::ue::set_bitrates(const asn1::s1ap::ue_aggregate_maximum_bitrate_s& rates) { bitrates = rates; } bool rrc::ue::setup_erabs(const asn1::s1ap::erab_to_be_setup_list_ctxt_su_req_l& e) { for (const auto& item : e) { auto& erab = item.value.erab_to_be_setup_item_ctxt_su_req(); if (erab.ext) { parent->rrc_log->warning("Not handling E-RABToBeSetupListCtxtSURequest extensions\n"); } if (erab.ie_exts_present) { parent->rrc_log->warning("Not handling E-RABToBeSetupListCtxtSURequest extensions\n"); } if (erab.transport_layer_address.length() > 32) { parent->rrc_log->error("IPv6 addresses not currently supported\n"); return false; } uint32_t teid_out; srslte::uint8_to_uint32(erab.gtp_teid.data(), &teid_out); const asn1::unbounded_octstring* nas_pdu = erab.nas_pdu_present ? &erab.nas_pdu : nullptr; bearer_list.add_erab(erab.erab_id, erab.erab_level_qos_params, erab.transport_layer_address, teid_out, nas_pdu); bearer_list.add_gtpu_bearer(parent->gtpu, erab.erab_id); } return true; } bool rrc::ue::setup_erabs(const asn1::s1ap::erab_to_be_setup_list_bearer_su_req_l& e) { for (const auto& item : e) { auto& erab = item.value.erab_to_be_setup_item_bearer_su_req(); if (erab.ext) { parent->rrc_log->warning("Not handling E-RABToBeSetupListBearerSUReq extensions\n"); } if (erab.ie_exts_present) { parent->rrc_log->warning("Not handling E-RABToBeSetupListBearerSUReq extensions\n"); } if (erab.transport_layer_address.length() > 32) { parent->rrc_log->error("IPv6 addresses not currently supported\n"); return false; } uint32_t teid_out; srslte::uint8_to_uint32(erab.gtp_teid.data(), &teid_out); bearer_list.add_erab( erab.erab_id, erab.erab_level_qos_params, erab.transport_layer_address, teid_out, &erab.nas_pdu); bearer_list.add_gtpu_bearer(parent->gtpu, erab.erab_id); } // Work in progress notify_s1ap_ue_erab_setup_response(e); send_connection_reconf_new_bearer(); return true; } bool rrc::ue::release_erabs() { bearer_list.release_erabs(); return true; } void rrc::ue::notify_s1ap_ue_erab_setup_response(const asn1::s1ap::erab_to_be_setup_list_bearer_su_req_l& e) { asn1::s1ap::erab_setup_resp_s res; const auto& erabs = bearer_list.get_erabs(); for (const auto& erab : e) { uint8_t id = erab.value.erab_to_be_setup_item_bearer_su_req().erab_id; if (erabs.count(id)) { res.protocol_ies.erab_setup_list_bearer_su_res_present = true; res.protocol_ies.erab_setup_list_bearer_su_res.value.push_back({}); auto& item = res.protocol_ies.erab_setup_list_bearer_su_res.value.back(); item.load_info_obj(ASN1_S1AP_ID_ERAB_SETUP_ITEM_BEARER_SU_RES); item.value.erab_setup_item_bearer_su_res().erab_id = id; srslte::uint32_to_uint8(bearer_list.get_erabs().at(id).teid_in, &item.value.erab_setup_item_bearer_su_res().gtp_teid[0]); } else { res.protocol_ies.erab_failed_to_setup_list_bearer_su_res_present = true; res.protocol_ies.erab_failed_to_setup_list_bearer_su_res.value.push_back({}); auto& item = res.protocol_ies.erab_failed_to_setup_list_bearer_su_res.value.back(); item.value.erab_item().erab_id = id; item.value.erab_item().cause.set_radio_network().value = asn1::s1ap::cause_radio_network_opts::invalid_qos_combination; } } parent->s1ap->ue_erab_setup_complete(rnti, res); } //! Helper method to access Cell configuration based on UE Carrier Index cell_info_common* rrc::ue::get_ue_cc_cfg(uint32_t ue_cc_idx) { if (ue_cc_idx >= mac_ctrl->get_ue_sched_cfg().supported_cc_list.size()) { return nullptr; } uint32_t enb_cc_idx = mac_ctrl->get_ue_sched_cfg().supported_cc_list[ue_cc_idx].enb_cc_idx; return parent->cell_common_list->get_cc_idx(enb_cc_idx); } //! Method to fill SCellToAddModList for SCell info int rrc::ue::fill_scell_to_addmod_list(asn1::rrc::rrc_conn_recfg_r8_ies_s* conn_reconf) { // check whether we have SCells configured const cell_info_common* pcell_cfg = get_ue_cc_cfg(UE_PCELL_CC_IDX); if (pcell_cfg->cell_cfg.scell_list.empty()) { return SRSLTE_SUCCESS; } // Check whether UE supports CA if (not eutra_capabilities.non_crit_ext_present or not eutra_capabilities.non_crit_ext.non_crit_ext_present or not eutra_capabilities.non_crit_ext.non_crit_ext.non_crit_ext_present or not eutra_capabilities.non_crit_ext.non_crit_ext.non_crit_ext.rf_params_v1020_present or eutra_capabilities.non_crit_ext.non_crit_ext.non_crit_ext.rf_params_v1020.supported_band_combination_r10.size() == 0) { parent->rrc_log->info("UE doesn't support CA. Skipping SCell activation\n"); return SRSLTE_SUCCESS; } // Allocate CQI + PUCCH for SCells. for (const scell_cfg_t& scell_cfg : pcell_cfg->cell_cfg.scell_list) { uint32_t cell_id = scell_cfg.cell_id; cell_ded_list.add_cell(parent->cell_common_list->get_cell_id(cell_id)->enb_cc_idx); } if (cell_ded_list.nof_cells() == 1) { // No SCell could be allocated. Fallback to single cell mode. return SRSLTE_SUCCESS; } parent->rrc_log->info("SCells activated for rnti=0x%x\n", rnti); conn_reconf->non_crit_ext_present = true; conn_reconf->non_crit_ext.non_crit_ext_present = true; conn_reconf->non_crit_ext.non_crit_ext.non_crit_ext_present = true; conn_reconf->non_crit_ext.non_crit_ext.non_crit_ext.scell_to_add_mod_list_r10_present = true; auto& list = conn_reconf->non_crit_ext.non_crit_ext.non_crit_ext.scell_to_add_mod_list_r10; // Add all SCells configured+allocated for the current PCell for (auto& p : cell_ded_list) { if (p.ue_cc_idx == UE_PCELL_CC_IDX) { continue; } uint32_t scell_idx = p.ue_cc_idx; const cell_info_common* cc_cfg = p.cell_common; const sib_type1_s& cell_sib1 = cc_cfg->sib1; const sib_type2_s& cell_sib2 = cc_cfg->sib2; scell_to_add_mod_r10_s cell; cell.scell_idx_r10 = scell_idx; cell.cell_identif_r10_present = true; cell.cell_identif_r10.pci_r10 = cc_cfg->cell_cfg.pci; cell.cell_identif_r10.dl_carrier_freq_r10 = cc_cfg->cell_cfg.dl_earfcn; cell.rr_cfg_common_scell_r10_present = true; // RadioResourceConfigCommon const rr_cfg_common_sib_s& cc_cfg_sib = cell_sib2.rr_cfg_common; auto& nonul_cfg = cell.rr_cfg_common_scell_r10.non_ul_cfg_r10; asn1::number_to_enum(nonul_cfg.dl_bw_r10, parent->cfg.cell.nof_prb); nonul_cfg.ant_info_common_r10.ant_ports_count.value = ant_info_common_s::ant_ports_count_opts::an1; nonul_cfg.phich_cfg_r10 = cc_cfg->mib.phich_cfg; nonul_cfg.pdsch_cfg_common_r10 = cc_cfg_sib.pdsch_cfg_common; // RadioResourceConfigCommonSCell-r10::ul-Configuration-r10 cell.rr_cfg_common_scell_r10.ul_cfg_r10_present = true; auto& ul_cfg = cell.rr_cfg_common_scell_r10.ul_cfg_r10; ul_cfg.ul_freq_info_r10.ul_carrier_freq_r10_present = true; ul_cfg.ul_freq_info_r10.ul_carrier_freq_r10 = cc_cfg->cell_cfg.ul_earfcn; ul_cfg.p_max_r10_present = cell_sib1.p_max_present; ul_cfg.p_max_r10 = cell_sib1.p_max; ul_cfg.ul_freq_info_r10.add_spec_emission_scell_r10 = 1; ul_cfg.ul_pwr_ctrl_common_scell_r10.p0_nominal_pusch_r10 = cc_cfg_sib.ul_pwr_ctrl_common.p0_nominal_pusch; ul_cfg.ul_pwr_ctrl_common_scell_r10.alpha_r10.value = cc_cfg_sib.ul_pwr_ctrl_common.alpha; ul_cfg.srs_ul_cfg_common_r10 = cc_cfg_sib.srs_ul_cfg_common; ul_cfg.ul_cp_len_r10.value = cc_cfg_sib.ul_cp_len.value; ul_cfg.pusch_cfg_common_r10 = cc_cfg_sib.pusch_cfg_common; // RadioResourceConfigDedicatedSCell-r10 cell.rr_cfg_ded_scell_r10_present = true; cell.rr_cfg_ded_scell_r10.phys_cfg_ded_scell_r10_present = true; cell.rr_cfg_ded_scell_r10.phys_cfg_ded_scell_r10.non_ul_cfg_r10_present = true; auto& nonul_cfg_ded = cell.rr_cfg_ded_scell_r10.phys_cfg_ded_scell_r10.non_ul_cfg_r10; nonul_cfg_ded.ant_info_r10_present = true; asn1::number_to_enum(nonul_cfg_ded.ant_info_r10.tx_mode_r10, parent->cfg.cell.nof_ports); nonul_cfg_ded.ant_info_r10.ue_tx_ant_sel.set(setup_opts::release); nonul_cfg_ded.cross_carrier_sched_cfg_r10_present = true; nonul_cfg_ded.cross_carrier_sched_cfg_r10.sched_cell_info_r10.set_own_r10().cif_presence_r10 = false; nonul_cfg_ded.pdsch_cfg_ded_r10_present = true; nonul_cfg_ded.pdsch_cfg_ded_r10.p_a.value = parent->cfg.pdsch_cfg.value; cell.rr_cfg_ded_scell_r10.phys_cfg_ded_scell_r10.ul_cfg_r10_present = true; auto& ul_cfg_ded = cell.rr_cfg_ded_scell_r10.phys_cfg_ded_scell_r10.ul_cfg_r10; ul_cfg_ded.ant_info_ul_r10_present = true; ul_cfg_ded.ant_info_ul_r10.tx_mode_ul_r10_present = true; asn1::number_to_enum(ul_cfg_ded.ant_info_ul_r10.tx_mode_ul_r10, parent->cfg.cell.nof_ports); ul_cfg_ded.pusch_cfg_ded_scell_r10_present = true; ul_cfg_ded.ul_pwr_ctrl_ded_scell_r10_present = true; ul_cfg_ded.ul_pwr_ctrl_ded_scell_r10.p0_ue_pusch_r10 = 0; ul_cfg_ded.ul_pwr_ctrl_ded_scell_r10.delta_mcs_enabled_r10.value = ul_pwr_ctrl_ded_scell_r10_s::delta_mcs_enabled_r10_opts::en0; ul_cfg_ded.ul_pwr_ctrl_ded_scell_r10.accumulation_enabled_r10 = true; ul_cfg_ded.ul_pwr_ctrl_ded_scell_r10.psrs_offset_ap_r10_present = true; ul_cfg_ded.ul_pwr_ctrl_ded_scell_r10.psrs_offset_ap_r10 = 3; ul_cfg_ded.ul_pwr_ctrl_ded_scell_r10.pathloss_ref_linking_r10.value = ul_pwr_ctrl_ded_scell_r10_s::pathloss_ref_linking_r10_opts::scell; ul_cfg_ded.cqi_report_cfg_scell_r10_present = true; ul_cfg_ded.cqi_report_cfg_scell_r10.nom_pdsch_rs_epre_offset_r10 = 0; ul_cfg_ded.cqi_report_cfg_scell_r10.cqi_report_periodic_scell_r10_present = true; // Add 256QAM if (ue_capabilities.category_dl >= 11 && ue_capabilities.support_dl_256qam) { cell.rr_cfg_ded_scell_r10.phys_cfg_ded_scell_r10.cqi_report_cfg_scell_v1250.set_present(true); auto cqi_report_cfg_scell = cell.rr_cfg_ded_scell_r10.phys_cfg_ded_scell_r10.cqi_report_cfg_scell_v1250.get(); cqi_report_cfg_scell->alt_cqi_table_r12_present = true; cqi_report_cfg_scell->alt_cqi_table_r12 = asn1::rrc::cqi_report_cfg_v1250_s::alt_cqi_table_r12_e_::all_sfs; } // Get CQI allocation for secondary cell auto& cqi_setup = ul_cfg_ded.cqi_report_cfg_scell_r10.cqi_report_periodic_scell_r10.set_setup(); get_cqi(&cqi_setup.cqi_pmi_cfg_idx, &cqi_setup.cqi_pucch_res_idx_r10, scell_idx); cqi_setup.cqi_format_ind_periodic_r10.set_wideband_cqi_r10(); cqi_setup.simul_ack_nack_and_cqi = parent->cfg.cqi_cfg.simultaneousAckCQI; #if SRS_ENABLED ul_cfg_ded.srs_ul_cfg_ded_r10_present = true; auto& srs_setup = ul_cfg_ded.srs_ul_cfg_ded_r10.set_setup(); srs_setup.srs_bw.value = srs_ul_cfg_ded_c::setup_s_::srs_bw_opts::bw0; srs_setup.srs_hop_bw.value = srs_ul_cfg_ded_c::setup_s_::srs_hop_bw_opts::hbw0; srs_setup.freq_domain_position = 0; srs_setup.dur = true; srs_setup.srs_cfg_idx = 167; srs_setup.tx_comb = 0; srs_setup.cyclic_shift.value = srs_ul_cfg_ded_c::setup_s_::cyclic_shift_opts::cs0; ul_cfg_ded.srs_ul_cfg_ded_v1020_present = true; ul_cfg_ded.srs_ul_cfg_ded_v1020.srs_ant_port_r10.value = srs_ant_port_opts::an1; ul_cfg_ded.srs_ul_cfg_ded_aperiodic_r10_present = true; ul_cfg_ded.srs_ul_cfg_ded_aperiodic_r10.set(setup_opts::release); #endif // SRS_ENABLED list.push_back(cell); // Create new PHY configuration structure for this SCell phy_interface_rrc_lte::phy_rrc_cfg_t scell_phy_rrc_ded = {}; srslte::set_phy_cfg_t_scell_config(&scell_phy_rrc_ded.phy_cfg, cell); scell_phy_rrc_ded.configured = true; // Set PUSCH dedicated configuration following 3GPP TS 36.331 R 10 Section 6.3.2 Radio resource control information // elements - PUSCH-Config // One value applies for all serving cells with an uplink (the associated functionality is common i.e. not // performed independently for each cell). scell_phy_rrc_ded.phy_cfg.ul_cfg.pusch.uci_offset = phy_rrc_dedicated_list[0].phy_cfg.ul_cfg.pusch.uci_offset; // Get corresponding eNB CC index scell_phy_rrc_ded.enb_cc_idx = cc_cfg->enb_cc_idx; // Append to PHY RRC config dedicated which will be applied further down phy_rrc_dedicated_list.push_back(scell_phy_rrc_ded); } // Set DL HARQ Feedback mode conn_reconf->rr_cfg_ded.phys_cfg_ded.pucch_cfg_ded_v1020.set_present(true); conn_reconf->rr_cfg_ded.phys_cfg_ded.pucch_cfg_ded_v1020->pucch_format_r10_present = true; conn_reconf->rr_cfg_ded.phys_cfg_ded.ext = true; auto pucch_format_r10 = conn_reconf->rr_cfg_ded.phys_cfg_ded.pucch_cfg_ded_v1020.get(); pucch_format_r10->pucch_format_r10_present = true; if (cell_ded_list.nof_cells() <= 2) { // Use PUCCH format 1b with channel selection for 2 serving cells auto& ch_sel_r10 = pucch_format_r10->pucch_format_r10.set_ch_sel_r10(); ch_sel_r10.n1_pucch_an_cs_r10_present = true; ch_sel_r10.n1_pucch_an_cs_r10.set_setup(); n1_pucch_an_cs_r10_l item0(4); // TODO: should we use a different n1PUCCH-AN-CS-List configuration? for (auto& it : item0) { it = cell_ded_list.is_pucch_cs_allocated() ? *cell_ded_list.get_n_pucch_cs() : 0; } ch_sel_r10.n1_pucch_an_cs_r10.setup().n1_pucch_an_cs_list_r10.push_back(item0); } else { // Use PUCCH format 3 for more than 2 serving cells auto& format3_r10 = pucch_format_r10->pucch_format_r10.set_format3_r10(); format3_r10.n3_pucch_an_list_r13_present = true; format3_r10.n3_pucch_an_list_r13.resize(4); for (auto& it : format3_r10.n3_pucch_an_list_r13) { // Hard-coded resource, only one user is supported it = 0; } } return SRSLTE_SUCCESS; } /********************** Handover **************************/ void rrc::ue::handle_ho_preparation_complete(bool is_success, srslte::unique_byte_buffer_t container) { mobility_handler->handle_ho_preparation_complete(is_success, std::move(container)); } /********************** HELPERS ***************************/ // Helper method to fill in rr_config_dedicated void rrc::ue::fill_rrc_setup_rr_config_dedicated(asn1::rrc::rr_cfg_ded_s* rr_cfg) { // Fill drbsToAddModList/srbsToAddModList/drbsToReleaseList bearer_list.fill_rr_cfg_ded(*rr_cfg); // Fill mac-MainConfig rr_cfg->mac_main_cfg_present = true; mac_main_cfg_s* mac_cfg = &rr_cfg->mac_main_cfg.set_explicit_value(); mac_cfg->ul_sch_cfg_present = true; mac_cfg->ul_sch_cfg = parent->cfg.mac_cnfg.ul_sch_cfg; mac_cfg->phr_cfg_present = true; mac_cfg->phr_cfg = parent->cfg.mac_cnfg.phr_cfg; mac_cfg->time_align_timer_ded = parent->cfg.mac_cnfg.time_align_timer_ded; // Fill physicalConfigDedicated rr_cfg->phys_cfg_ded_present = true; phys_cfg_ded_s* phy_cfg = &rr_cfg->phys_cfg_ded; phy_cfg->pusch_cfg_ded_present = true; phy_cfg->pusch_cfg_ded = parent->cfg.pusch_cfg; phy_cfg->sched_request_cfg_present = true; phy_cfg->sched_request_cfg.set_setup(); phy_cfg->sched_request_cfg.setup().dsr_trans_max = parent->cfg.sr_cfg.dsr_max; // set default antenna config phy_cfg->ant_info_present = true; phy_cfg->ant_info.set_explicit_value(); if (parent->cfg.cell.nof_ports == 1) { phy_cfg->ant_info.explicit_value().tx_mode.value = ant_info_ded_s::tx_mode_e_::tm1; } else { phy_cfg->ant_info.explicit_value().tx_mode.value = ant_info_ded_s::tx_mode_e_::tm2; } phy_cfg->ant_info.explicit_value().ue_tx_ant_sel.set(setup_e::release); phy_cfg->sched_request_cfg.setup().sr_cfg_idx = (uint8_t)cell_ded_list.get_sr_res()->sr_I; phy_cfg->sched_request_cfg.setup().sr_pucch_res_idx = (uint16_t)cell_ded_list.get_sr_res()->sr_N_pucch; // Power control phy_cfg->ul_pwr_ctrl_ded_present = true; phy_cfg->ul_pwr_ctrl_ded.p0_ue_pusch = 0; phy_cfg->ul_pwr_ctrl_ded.delta_mcs_enabled = ul_pwr_ctrl_ded_s::delta_mcs_enabled_e_::en0; phy_cfg->ul_pwr_ctrl_ded.accumulation_enabled = true; phy_cfg->ul_pwr_ctrl_ded.p0_ue_pucch = 0; phy_cfg->ul_pwr_ctrl_ded.psrs_offset = 3; // PDSCH phy_cfg->pdsch_cfg_ded_present = true; phy_cfg->pdsch_cfg_ded.p_a = parent->cfg.pdsch_cfg; // PUCCH phy_cfg->pucch_cfg_ded_present = true; phy_cfg->pucch_cfg_ded.ack_nack_repeat.set(pucch_cfg_ded_s::ack_nack_repeat_c_::types::release); phy_cfg->cqi_report_cfg_present = true; if (parent->cfg.cqi_cfg.mode == RRC_CFG_CQI_MODE_APERIODIC) { phy_cfg->cqi_report_cfg.cqi_report_mode_aperiodic_present = true; phy_cfg->cqi_report_cfg.cqi_report_mode_aperiodic = cqi_report_mode_aperiodic_e::rm30; } else { phy_cfg->cqi_report_cfg.cqi_report_periodic_present = true; phy_cfg->cqi_report_cfg.cqi_report_periodic.set_setup(); phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().cqi_format_ind_periodic.set( cqi_report_periodic_c::setup_s_::cqi_format_ind_periodic_c_::types::wideband_cqi); phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().simul_ack_nack_and_cqi = parent->cfg.cqi_cfg.simultaneousAckCQI; if (get_cqi(&phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().cqi_pmi_cfg_idx, &phy_cfg->cqi_report_cfg.cqi_report_periodic.setup().cqi_pucch_res_idx, UE_PCELL_CC_IDX)) { parent->rrc_log->error("Allocating CQI resources for rnti=%d\n", rnti); return; } } phy_cfg->cqi_report_cfg.nom_pdsch_rs_epre_offset = 0; rr_cfg->rlf_timers_and_consts_r9.set_present(false); rr_cfg->sps_cfg_present = false; } void rrc::ue::send_dl_ccch(dl_ccch_msg_s* dl_ccch_msg) { // Allocate a new PDU buffer, pack the message and send to PDCP srslte::unique_byte_buffer_t pdu = srslte::allocate_unique_buffer(*pool); if (pdu) { asn1::bit_ref bref(pdu->msg, pdu->get_tailroom()); if (dl_ccch_msg->pack(bref) != asn1::SRSASN_SUCCESS) { parent->rrc_log->error_hex(pdu->msg, pdu->N_bytes, "Failed to pack DL-CCCH-Msg:\n"); return; } pdu->N_bytes = (uint32_t)bref.distance_bytes(); char buf[32] = {}; sprintf(buf, "SRB0 - rnti=0x%x", rnti); parent->log_rrc_message(buf, Tx, pdu.get(), *dl_ccch_msg, dl_ccch_msg->msg.c1().type().to_string()); parent->rlc->write_sdu(rnti, RB_ID_SRB0, std::move(pdu)); } else { parent->rrc_log->error("Allocating pdu\n"); } } bool rrc::ue::send_dl_dcch(const dl_dcch_msg_s* dl_dcch_msg, srslte::unique_byte_buffer_t pdu) { if (!pdu) { pdu = srslte::allocate_unique_buffer(*pool); } if (pdu) { asn1::bit_ref bref(pdu->msg, pdu->get_tailroom()); if (dl_dcch_msg->pack(bref) == asn1::SRSASN_ERROR_ENCODE_FAIL) { parent->rrc_log->error("Failed to encode DL-DCCH-Msg\n"); return false; } pdu->N_bytes = (uint32_t)bref.distance_bytes(); // send on SRB2 if user is fully registered (after RRC reconfig complete) uint32_t lcid = parent->rlc->has_bearer(rnti, RB_ID_SRB2) && state == RRC_STATE_REGISTERED ? RB_ID_SRB2 : RB_ID_SRB1; char buf[32] = {}; sprintf(buf, "SRB%d - rnti=0x%x", lcid, rnti); parent->log_rrc_message(buf, Tx, pdu.get(), *dl_dcch_msg, dl_dcch_msg->msg.c1().type().to_string()); parent->pdcp->write_sdu(rnti, lcid, std::move(pdu)); } else { parent->rrc_log->error("Allocating pdu\n"); return false; } return true; } void rrc::ue::apply_setup_phy_common(const asn1::rrc::rr_cfg_common_sib_s& config) { // Return if no cell is supported if (phy_rrc_dedicated_list.empty()) { return; } // Flatten common configuration auto& current_phy_cfg = phy_rrc_dedicated_list[0].phy_cfg; set_phy_cfg_t_common_prach(¤t_phy_cfg, &config.prach_cfg.prach_cfg_info, config.prach_cfg.root_seq_idx); set_phy_cfg_t_common_pdsch(¤t_phy_cfg, config.pdsch_cfg_common); set_phy_cfg_t_common_pusch(¤t_phy_cfg, config.pusch_cfg_common); set_phy_cfg_t_common_pucch(¤t_phy_cfg, config.pucch_cfg_common); set_phy_cfg_t_common_srs(¤t_phy_cfg, config.srs_ul_cfg_common); set_phy_cfg_t_common_pwr_ctrl(¤t_phy_cfg, config.ul_pwr_ctrl_common); // Set PCell index phy_rrc_dedicated_list[0].configured = true; phy_rrc_dedicated_list[0].enb_cc_idx = get_ue_cc_cfg(UE_PCELL_CC_IDX)->enb_cc_idx; // Send configuration to physical layer if (parent->phy != nullptr) { parent->phy->set_config(rnti, phy_rrc_dedicated_list); } } void rrc::ue::apply_setup_phy_config_dedicated(const asn1::rrc::phys_cfg_ded_s& phys_cfg_ded) { // Return if no cell is supported if (phy_rrc_dedicated_list.empty()) { return; } // Load PCell dedicated configuration srslte::set_phy_cfg_t_dedicated_cfg(&phy_rrc_dedicated_list[0].phy_cfg, phys_cfg_ded); // Deactivates eNb/Cells for this UE for (uint32_t cc = 1; cc < phy_rrc_dedicated_list.size(); cc++) { phy_rrc_dedicated_list[cc].configured = false; } // Send configuration to physical layer if (parent->phy != nullptr) { parent->phy->set_config(rnti, phy_rrc_dedicated_list); } } void rrc::ue::apply_reconf_phy_config(const asn1::rrc::rrc_conn_recfg_r8_ies_s& reconfig_r8) { // Return if no cell is supported if (phy_rrc_dedicated_list.empty()) { return; } // Configure PCell if available configuration if (reconfig_r8.rr_cfg_ded_present) { auto& rr_cfg_ded = reconfig_r8.rr_cfg_ded; if (rr_cfg_ded.phys_cfg_ded_present) { auto& phys_cfg_ded = rr_cfg_ded.phys_cfg_ded; srslte::set_phy_cfg_t_dedicated_cfg(&phy_rrc_dedicated_list[0].phy_cfg, phys_cfg_ded); } } // Parse extensions if (reconfig_r8.non_crit_ext_present) { auto& reconfig_r890 = reconfig_r8.non_crit_ext; if (reconfig_r890.non_crit_ext_present) { auto& reconfig_r920 = reconfig_r890.non_crit_ext; if (reconfig_r920.non_crit_ext_present) { auto& reconfig_r1020 = reconfig_r920.non_crit_ext; // Handle Add/Modify SCell list if (reconfig_r1020.scell_to_add_mod_list_r10_present) { // This is already applied when packing the SCell list } } } } // Send configuration to physical layer if (parent->phy != nullptr) { parent->phy->set_config(rnti, phy_rrc_dedicated_list); } } void rrc::ue::apply_pdcp_srb_updates() { for (const srb_to_add_mod_s& srb : bearer_list.get_pending_addmod_srbs()) { parent->pdcp->add_bearer(rnti, srb.srb_id, srslte::make_srb_pdcp_config_t(srb.srb_id, false)); // For SRB2, enable security/encryption/integrity if (ue_security_cfg.is_as_sec_cfg_valid()) { parent->pdcp->config_security(rnti, srb.srb_id, ue_security_cfg.get_as_sec_cfg()); parent->pdcp->enable_integrity(rnti, srb.srb_id); parent->pdcp->enable_encryption(rnti, srb.srb_id); } } } void rrc::ue::apply_pdcp_drb_updates() { for (uint8_t drb_id : bearer_list.get_pending_rem_drbs()) { parent->pdcp->del_bearer(rnti, drb_id + 2); } for (const drb_to_add_mod_s& drb : bearer_list.get_pending_addmod_drbs()) { // Configure DRB1 in PDCP if (drb.pdcp_cfg_present) { srslte::pdcp_config_t pdcp_cnfg_drb = srslte::make_drb_pdcp_config_t(drb.drb_id, false, drb.pdcp_cfg); parent->pdcp->add_bearer(rnti, drb.lc_ch_id, pdcp_cnfg_drb); } else { srslte::pdcp_config_t pdcp_cnfg_drb = srslte::make_drb_pdcp_config_t(drb.drb_id, false); parent->pdcp->add_bearer(rnti, drb.lc_ch_id, pdcp_cnfg_drb); } if (ue_security_cfg.is_as_sec_cfg_valid()) { parent->pdcp->config_security(rnti, drb.lc_ch_id, ue_security_cfg.get_as_sec_cfg()); parent->pdcp->enable_integrity(rnti, drb.lc_ch_id); parent->pdcp->enable_encryption(rnti, drb.lc_ch_id); } } } void rrc::ue::apply_rlc_rb_updates() { for (const srb_to_add_mod_s& srb : bearer_list.get_pending_addmod_srbs()) { parent->rlc->add_bearer(rnti, srb.srb_id, srslte::rlc_config_t::srb_config(srb.srb_id)); } if (bearer_list.get_pending_rem_drbs().size() > 0) { parent->rrc_log->error("Removing DRBs not currently supported\n"); } for (const drb_to_add_mod_s& drb : bearer_list.get_pending_addmod_drbs()) { if (not drb.rlc_cfg_present) { parent->rrc_log->warning("Default RLC DRB config not supported\n"); } parent->rlc->add_bearer(rnti, drb.lc_ch_id, srslte::make_rlc_config_t(drb.rlc_cfg)); } } int rrc::ue::get_cqi(uint16_t* pmi_idx, uint16_t* n_pucch, uint32_t ue_cc_idx) { cell_ctxt_dedicated* c = cell_ded_list.get_ue_cc_idx(ue_cc_idx); if (c != nullptr and c->cqi_res_present) { *pmi_idx = c->cqi_res.pmi_idx; *n_pucch = c->cqi_res.pucch_res; return SRSLTE_SUCCESS; } else { parent->rrc_log->error("CQI resources for ue_cc_idx=%d have not been allocated\n", ue_cc_idx); return SRSLTE_ERROR; } } bool rrc::ue::is_allocated() const { return cell_ded_list.is_allocated(); } int rrc::ue::get_ri(uint32_t m_ri, uint16_t* ri_idx) { int32_t ret = SRSLTE_SUCCESS; uint32_t I_ri = 0; int32_t N_offset_ri = 0; // Naivest approach: overlap RI with PMI switch (m_ri) { case 0: // Disabled break; case 1: I_ri = -N_offset_ri; break; case 2: I_ri = 161 - N_offset_ri; break; case 4: I_ri = 322 - N_offset_ri; break; case 8: I_ri = 483 - N_offset_ri; break; case 16: I_ri = 644 - N_offset_ri; break; case 32: I_ri = 805 - N_offset_ri; break; default: parent->rrc_log->error("Allocating RI: invalid m_ri=%d\n", m_ri); } // If ri_dix is available, copy if (ri_idx) { *ri_idx = I_ri; } return ret; } } // namespace srsenb