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srsRAN/srsenb/src/stack/rrc/rrc_ue.cc

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/*
* 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<uint32_t>(
(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<true>* 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(&current_phy_cfg, &config.prach_cfg.prach_cfg_info, config.prach_cfg.root_seq_idx);
set_phy_cfg_t_common_pdsch(&current_phy_cfg, config.pdsch_cfg_common);
set_phy_cfg_t_common_pusch(&current_phy_cfg, config.pusch_cfg_common);
set_phy_cfg_t_common_pucch(&current_phy_cfg, config.pucch_cfg_common);
set_phy_cfg_t_common_srs(&current_phy_cfg, config.srs_ul_cfg_common);
set_phy_cfg_t_common_pwr_ctrl(&current_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
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