lte-test-radio-link-failure.cc

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/*
 * Copyright (c) 2018 Fraunhofer ESK
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Author: Vignesh Babu <ns3-dev@esk.fraunhofer.de>
 *
 * Modified by:
 *          Zoraze Ali <zoraze.ali@cttc.es> (included both RRC protocol, two
 *                                           eNB scenario and UE jump away
 *                                           logic)
 */
 
#include "lte-test-radio-link-failure.h"
 
#include "ns3/core-module.h"
#include "ns3/internet-module.h"
#include "ns3/lte-module.h"
#include "ns3/mobility-module.h"
#include "ns3/network-module.h"
#include "ns3/packet-sink-helper.h"
#include "ns3/point-to-point-module.h"
#include "ns3/udp-client-server-helper.h"
 
#include <iomanip>
#include <iostream>
#include <stdio.h>
#include <vector>
 
using namespace ns3;
 
NS_LOG_COMPONENT_DEFINE("LteRadioLinkFailureTest");
 
/*
 * Test Suite
 */
LteRadioLinkFailureTestSuite::LteRadioLinkFailureTestSuite()
    : TestSuite("lte-radio-link-failure", Type::SYSTEM)
{
    std::vector<Vector> uePositionList;
    std::vector<Vector> enbPositionList;
    std::vector<Time> checkConnectedList;
    Vector ueJumpAwayPosition;
 
    uePositionList.emplace_back(10, 0, 0);
    enbPositionList.emplace_back(0, 0, 0);
    ueJumpAwayPosition = Vector(7000.0, 0.0, 0.0);
    // check before jumping
    checkConnectedList.push_back(Seconds(0.3));
    // check connection after jumping but before T310 timer expiration.
    // This is to make sure that UE stays in connected mode
    // before the expiration of T310 timer.
    checkConnectedList.push_back(Seconds(1));
 
    // One eNB: Ideal RRC PROTOCOL
    //
    AddTestCase(new LteRadioLinkFailureTestCase(1,
                                                1,
                                                Seconds(2),
                                                true,
                                                uePositionList,
                                                enbPositionList,
                                                ueJumpAwayPosition,
                                                checkConnectedList),
                TestCase::Duration::QUICK);
 
    // One eNB: Real RRC PROTOCOL
    AddTestCase(new LteRadioLinkFailureTestCase(1,
                                                1,
                                                Seconds(2),
                                                false,
                                                uePositionList,
                                                enbPositionList,
                                                ueJumpAwayPosition,
                                                checkConnectedList),
                TestCase::Duration::QUICK);
 
    // Two eNBs: Ideal RRC PROTOCOL
 
    // We place the second eNB close to the position where the UE will jump
    enbPositionList.emplace_back(7020, 0, 0);
 
    AddTestCase(new LteRadioLinkFailureTestCase(2,
                                                1,
                                                Seconds(2),
                                                true,
                                                uePositionList,
                                                enbPositionList,
                                                ueJumpAwayPosition,
                                                checkConnectedList),
                TestCase::Duration::QUICK);
 
    // Two eNBs: Ideal RRC PROTOCOL
    AddTestCase(new LteRadioLinkFailureTestCase(2,
                                                1,
                                                Seconds(2),
                                                false,
                                                uePositionList,
                                                enbPositionList,
                                                ueJumpAwayPosition,
                                                checkConnectedList),
                TestCase::Duration::QUICK);
 
} // end of LteRadioLinkFailureTestSuite::LteRadioLinkFailureTestSuite ()
 
/**
 * @ingroup lte-test
 * Static variable for test initialization
 */
static LteRadioLinkFailureTestSuite g_lteRadioLinkFailureTestSuite;
 
/*
 * Test Case
 */
 
std::string
LteRadioLinkFailureTestCase::BuildNameString(uint32_t numEnbs, uint32_t numUes, bool isIdealRrc)
{
    std::ostringstream oss;
    std::string rrcProtocol;
    if (isIdealRrc)
    {
        rrcProtocol = "RRC Ideal";
    }
    else
    {
        rrcProtocol = "RRC Real";
    }
    oss << numEnbs << " eNBs, " << numUes << " UEs, " << rrcProtocol << " Protocol";
    return oss.str();
}
 
LteRadioLinkFailureTestCase::LteRadioLinkFailureTestCase(uint32_t numEnbs,
                                                         uint32_t numUes,
                                                         Time simTime,
                                                         bool isIdealRrc,
                                                         std::vector<Vector> uePositionList,
                                                         std::vector<Vector> enbPositionList,
                                                         Vector ueJumpAwayPosition,
                                                         std::vector<Time> checkConnectedList)
    : TestCase(BuildNameString(numEnbs, numUes, isIdealRrc)),
      m_numEnbs(numEnbs),
      m_numUes(numUes),
      m_simTime(simTime),
      m_isIdealRrc(isIdealRrc),
      m_uePositionList(uePositionList),
      m_enbPositionList(enbPositionList),
      m_checkConnectedList(checkConnectedList),
      m_ueJumpAwayPosition(ueJumpAwayPosition)
{
    NS_LOG_FUNCTION(this << GetName());
    m_lastState = LteUeRrc::NUM_STATES;
    m_radioLinkFailureDetected = false;
    m_numOfInSyncIndications = 0;
    m_numOfOutOfSyncIndications = 0;
}
 
LteRadioLinkFailureTestCase::~LteRadioLinkFailureTestCase()
{
    NS_LOG_FUNCTION(this << GetName());
}
 
void
LteRadioLinkFailureTestCase::DoRun()
{
    // LogLevel logLevel = (LogLevel) (LOG_PREFIX_FUNC | LOG_PREFIX_TIME | LOG_LEVEL_ALL);
    // LogComponentEnable ("LteUeRrc", logLevel);
    // LogComponentEnable ("LteEnbRrc", logLevel);
    // LogComponentEnable ("LteRadioLinkFailureTest", logLevel);
    SetDataDir(NS_TEST_SOURCEDIR);
 
    Config::SetDefault("ns3::MacStatsCalculator::DlOutputFilename",
                       StringValue(CreateTempDirFilename("DlMacStats.txt")));
    Config::SetDefault("ns3::MacStatsCalculator::UlOutputFilename",
                       StringValue(CreateTempDirFilename("UlMacStats.txt")));
    Config::SetDefault("ns3::RadioBearerStatsCalculator::DlRlcOutputFilename",
                       StringValue(CreateTempDirFilename("DlRlcStats.txt")));
    Config::SetDefault("ns3::RadioBearerStatsCalculator::UlRlcOutputFilename",
                       StringValue(CreateTempDirFilename("UlRlcStats.txt")));
    Config::SetDefault("ns3::RadioBearerStatsCalculator::DlPdcpOutputFilename",
                       StringValue(CreateTempDirFilename("DlPdcpStats.txt")));
    Config::SetDefault("ns3::RadioBearerStatsCalculator::UlPdcpOutputFilename",
                       StringValue(CreateTempDirFilename("UlPdcpStats.txt")));
    Config::SetDefault("ns3::PhyStatsCalculator::DlRsrpSinrFilename",
                       StringValue(CreateTempDirFilename("DlRsrpSinrStats.txt")));
    Config::SetDefault("ns3::PhyStatsCalculator::UlSinrFilename",
                       StringValue(CreateTempDirFilename("UlSinrStats.txt")));
    Config::SetDefault("ns3::PhyStatsCalculator::UlInterferenceFilename",
                       StringValue(CreateTempDirFilename("UlInterferenceStats.txt")));
    Config::SetDefault("ns3::PhyRxStatsCalculator::DlRxOutputFilename",
                       StringValue(CreateTempDirFilename("DlRxPhyStats.txt")));
    Config::SetDefault("ns3::PhyRxStatsCalculator::UlRxOutputFilename",
                       StringValue(CreateTempDirFilename("UlRxPhyStats.txt")));
    Config::SetDefault("ns3::PhyTxStatsCalculator::DlTxOutputFilename",
                       StringValue(CreateTempDirFilename("DlTxPhyStats.txt")));
    Config::SetDefault("ns3::PhyTxStatsCalculator::UlTxOutputFilename",
                       StringValue(CreateTempDirFilename("UlTxPhyStats.txt")));
 
    NS_LOG_FUNCTION(this << GetName());
    uint16_t numBearersPerUe = 1;
    Time simTime = m_simTime;
    double eNodeB_txPower = 43;
 
    Config::SetDefault("ns3::LteHelper::UseIdealRrc", BooleanValue(m_isIdealRrc));
 
    Ptr<LteHelper> lteHelper = CreateObject<LteHelper>();
    Ptr<PointToPointEpcHelper> epcHelper = CreateObject<PointToPointEpcHelper>();
    lteHelper->SetEpcHelper(epcHelper);
 
    lteHelper->SetPathlossModelType(TypeId::LookupByName("ns3::LogDistancePropagationLossModel"));
    lteHelper->SetPathlossModelAttribute("Exponent", DoubleValue(3.9));
    lteHelper->SetPathlossModelAttribute("ReferenceLoss",
                                         DoubleValue(38.57)); // ref. loss in dB at 1m for 2.025GHz
    lteHelper->SetPathlossModelAttribute("ReferenceDistance", DoubleValue(1));
 
    //----power related (equal for all base stations)----
    Config::SetDefault("ns3::LteEnbPhy::TxPower", DoubleValue(eNodeB_txPower));
    Config::SetDefault("ns3::LteUePhy::TxPower", DoubleValue(23));
    Config::SetDefault("ns3::LteUePhy::NoiseFigure", DoubleValue(7));
    Config::SetDefault("ns3::LteEnbPhy::NoiseFigure", DoubleValue(2));
    Config::SetDefault("ns3::LteUePhy::EnableUplinkPowerControl", BooleanValue(true));
    Config::SetDefault("ns3::LteUePowerControl::ClosedLoop", BooleanValue(true));
    Config::SetDefault("ns3::LteUePowerControl::AccumulationEnabled", BooleanValue(true));
 
    //----frequency related----
    lteHelper->SetEnbDeviceAttribute("DlEarfcn", UintegerValue(100));   // 2120MHz
    lteHelper->SetEnbDeviceAttribute("UlEarfcn", UintegerValue(18100)); // 1930MHz
    lteHelper->SetEnbDeviceAttribute("DlBandwidth", UintegerValue(25)); // 5MHz
    lteHelper->SetEnbDeviceAttribute("UlBandwidth", UintegerValue(25)); // 5MHz
 
    //----others----
    lteHelper->SetSchedulerType("ns3::PfFfMacScheduler");
    Config::SetDefault("ns3::LteAmc::AmcModel", EnumValue(LteAmc::PiroEW2010));
    Config::SetDefault("ns3::LteAmc::Ber", DoubleValue(0.01));
    Config::SetDefault("ns3::PfFfMacScheduler::HarqEnabled", BooleanValue(true));
 
    // Radio link failure detection parameters
    Config::SetDefault("ns3::LteUeRrc::N310", UintegerValue(1));
    Config::SetDefault("ns3::LteUeRrc::N311", UintegerValue(1));
    Config::SetDefault("ns3::LteUeRrc::T310", TimeValue(Seconds(1)));
 
    // Create the internet
    Ptr<Node> pgw = epcHelper->GetPgwNode();
    // Create a single RemoteHost0x18ab460
    NodeContainer remoteHostContainer;
    remoteHostContainer.Create(1);
    Ptr<Node> remoteHost = remoteHostContainer.Get(0);
    InternetStackHelper internet;
    internet.Install(remoteHostContainer);
    PointToPointHelper p2ph;
    p2ph.SetDeviceAttribute("DataRate", DataRateValue(DataRate("100Gb/s")));
    p2ph.SetDeviceAttribute("Mtu", UintegerValue(1500));
    p2ph.SetChannelAttribute("Delay", TimeValue(Seconds(0.010)));
    NetDeviceContainer internetDevices = p2ph.Install(pgw, remoteHost);
    Ipv4AddressHelper ipv4h;
    ipv4h.SetBase("1.0.0.0", "255.0.0.0");
    Ipv4InterfaceContainer internetIpIfaces = ipv4h.Assign(internetDevices);
    Ipv4Address remoteHostAddr = internetIpIfaces.GetAddress(1);
    Ipv4StaticRoutingHelper ipv4RoutingHelper;
    Ptr<Ipv4StaticRouting> remoteHostStaticRouting =
        ipv4RoutingHelper.GetStaticRouting(remoteHost->GetObject<Ipv4>());
    remoteHostStaticRouting->AddNetworkRouteTo(Ipv4Address("7.0.0.0"), Ipv4Mask("255.0.0.0"), 1);
 
    // Create Nodes: eNodeB and UE
    NodeContainer enbNodes;
    NodeContainer ueNodes;
    enbNodes.Create(m_numEnbs);
    ueNodes.Create(m_numUes);
 
    // Mobility
    Ptr<ListPositionAllocator> positionAllocEnb = CreateObject<ListPositionAllocator>();
 
    for (auto enbPosIt = m_enbPositionList.begin(); enbPosIt != m_enbPositionList.end(); ++enbPosIt)
    {
        positionAllocEnb->Add(*enbPosIt);
    }
    MobilityHelper mobility;
    mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
    mobility.SetPositionAllocator(positionAllocEnb);
    mobility.Install(enbNodes);
 
    Ptr<ListPositionAllocator> positionAllocUe = CreateObject<ListPositionAllocator>();
 
    for (auto uePosIt = m_uePositionList.begin(); uePosIt != m_uePositionList.end(); ++uePosIt)
    {
        positionAllocUe->Add(*uePosIt);
    }
 
    mobility.SetPositionAllocator(positionAllocUe);
    mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
    mobility.Install(ueNodes);
    m_ueMobility = ueNodes.Get(0)->GetObject<MobilityModel>();
 
    // Install LTE Devices in eNB and UEs
    NetDeviceContainer enbDevs;
    NetDeviceContainer ueDevs;
 
    int64_t randomStream = 1;
    enbDevs = lteHelper->InstallEnbDevice(enbNodes);
    randomStream += lteHelper->AssignStreams(enbDevs, randomStream);
    ueDevs = lteHelper->InstallUeDevice(ueNodes);
    randomStream += lteHelper->AssignStreams(ueDevs, randomStream);
 
    // Install the IP stack on the UEs
    internet.Install(ueNodes);
    Ipv4InterfaceContainer ueIpIfaces;
    ueIpIfaces = epcHelper->AssignUeIpv4Address(NetDeviceContainer(ueDevs));
 
    // Attach a UE to a eNB
    lteHelper->Attach(ueDevs);
 
    // Install and start applications on UEs and remote host
    uint16_t dlPort = 10000;
    uint16_t ulPort = 20000;
 
    DataRateValue dataRateValue = DataRate("18.6Mbps");
    uint64_t bitRate = dataRateValue.Get().GetBitRate();
    uint32_t packetSize = 1024; // bytes
    NS_LOG_DEBUG("bit rate " << bitRate);
    double interPacketInterval = static_cast<double>(packetSize * 8) / bitRate;
    Time udpInterval = Seconds(interPacketInterval);
 
    NS_LOG_DEBUG("UDP will use application interval " << udpInterval.As(Time::S));
 
    for (uint32_t u = 0; u < m_numUes; ++u)
    {
        Ptr<Node> ue = ueNodes.Get(u);
        // Set the default gateway for the UE
        Ptr<Ipv4StaticRouting> ueStaticRouting =
            ipv4RoutingHelper.GetStaticRouting(ue->GetObject<Ipv4>());
        ueStaticRouting->SetDefaultRoute(epcHelper->GetUeDefaultGatewayAddress(), 1);
 
        for (uint32_t b = 0; b < numBearersPerUe; ++b)
        {
            ApplicationContainer ulClientApps;
            ApplicationContainer ulServerApps;
            ApplicationContainer dlClientApps;
            ApplicationContainer dlServerApps;
 
            ++dlPort;
            ++ulPort;
 
            NS_LOG_LOGIC("installing UDP DL app for UE " << u + 1);
            UdpClientHelper dlClientHelper(ueIpIfaces.GetAddress(u), dlPort);
            dlClientHelper.SetAttribute("Interval", TimeValue(udpInterval));
            dlClientHelper.SetAttribute("MaxPackets", UintegerValue(1000000));
            dlClientApps.Add(dlClientHelper.Install(remoteHost));
 
            PacketSinkHelper dlPacketSinkHelper("ns3::UdpSocketFactory",
                                                InetSocketAddress(Ipv4Address::GetAny(), dlPort));
            dlServerApps.Add(dlPacketSinkHelper.Install(ue));
 
            NS_LOG_LOGIC("installing UDP UL app for UE " << u + 1);
            UdpClientHelper ulClientHelper(remoteHostAddr, ulPort);
            ulClientHelper.SetAttribute("Interval", TimeValue(udpInterval));
            ulClientHelper.SetAttribute("MaxPackets", UintegerValue(1000000));
            ulClientApps.Add(ulClientHelper.Install(ue));
 
            PacketSinkHelper ulPacketSinkHelper("ns3::UdpSocketFactory",
                                                InetSocketAddress(Ipv4Address::GetAny(), ulPort));
            ulServerApps.Add(ulPacketSinkHelper.Install(remoteHost));
 
            Ptr<EpcTft> tft = Create<EpcTft>();
            EpcTft::PacketFilter dlpf;
            dlpf.localPortStart = dlPort;
            dlpf.localPortEnd = dlPort;
            tft->Add(dlpf);
            EpcTft::PacketFilter ulpf;
            ulpf.remotePortStart = ulPort;
            ulpf.remotePortEnd = ulPort;
            tft->Add(ulpf);
            EpsBearer bearer(EpsBearer::NGBR_IMS);
            lteHelper->ActivateDedicatedEpsBearer(ueDevs.Get(u), bearer, tft);
 
            dlServerApps.Start(Seconds(0.27));
            dlClientApps.Start(Seconds(0.27));
            ulServerApps.Start(Seconds(0.27));
            ulClientApps.Start(Seconds(0.27));
        }
    }
 
    lteHelper->EnableTraces();
 
    for (uint32_t u = 0; u < m_numUes; ++u)
    {
        Simulator::Schedule(m_checkConnectedList.at(u),
                            &LteRadioLinkFailureTestCase::CheckConnected,
                            this,
                            ueDevs.Get(u),
                            enbDevs);
    }
 
    Simulator::Schedule(Seconds(0.4),
                        &LteRadioLinkFailureTestCase::JumpAway,
                        this,
                        m_ueJumpAwayPosition);
 
    // connect custom trace sinks
    Config::Connect(
        "/NodeList/*/DeviceList/*/LteEnbRrc/ConnectionEstablished",
        MakeCallback(&LteRadioLinkFailureTestCase::ConnectionEstablishedEnbCallback, this));
    Config::Connect(
        "/NodeList/*/DeviceList/*/LteUeRrc/ConnectionEstablished",
        MakeCallback(&LteRadioLinkFailureTestCase::ConnectionEstablishedUeCallback, this));
    Config::Connect("/NodeList/*/DeviceList/*/LteUeRrc/StateTransition",
                    MakeCallback(&LteRadioLinkFailureTestCase::UeStateTransitionCallback, this));
    Config::Connect(
        "/NodeList/*/DeviceList/*/LteEnbRrc/NotifyConnectionRelease",
        MakeCallback(&LteRadioLinkFailureTestCase::ConnectionReleaseAtEnbCallback, this));
    Config::Connect("/NodeList/*/DeviceList/*/LteUeRrc/PhySyncDetection",
                    MakeCallback(&LteRadioLinkFailureTestCase::PhySyncDetectionCallback, this));
    Config::Connect("/NodeList/*/DeviceList/*/LteUeRrc/RadioLinkFailure",
                    MakeCallback(&LteRadioLinkFailureTestCase::RadioLinkFailureCallback, this));
 
    Simulator::Stop(simTime);
 
    Simulator::Run();
    for (uint32_t u = 0; u < m_numUes; ++u)
    {
        NS_TEST_ASSERT_MSG_EQ(
            m_radioLinkFailureDetected,
            true,
            "Error, UE transitions to idle state for other than radio link failure");
        CheckIdle(ueDevs.Get(u), enbDevs);
    }
    Simulator::Destroy();
}
 
void
LteRadioLinkFailureTestCase::JumpAway(Vector UeJumpAwayPosition)
{
    NS_LOG_FUNCTION(this);
    // move to a far away location so that transmission errors occur
 
    m_ueMobility->SetPosition(UeJumpAwayPosition);
}
 
void
LteRadioLinkFailureTestCase::CheckConnected(Ptr<NetDevice> ueDevice, NetDeviceContainer enbDevices)
{
    NS_LOG_FUNCTION(ueDevice);
 
    Ptr<LteUeNetDevice> ueLteDevice = ueDevice->GetObject<LteUeNetDevice>();
    Ptr<LteUeRrc> ueRrc = ueLteDevice->GetRrc();
    NS_TEST_ASSERT_MSG_EQ(ueRrc->GetState(), LteUeRrc::CONNECTED_NORMALLY, "Wrong LteUeRrc state!");
    uint16_t cellId = ueRrc->GetCellId();
 
    Ptr<LteEnbNetDevice> enbLteDevice;
 
    for (auto enbDevIt = enbDevices.Begin(); enbDevIt != enbDevices.End(); ++enbDevIt)
    {
        if (((*enbDevIt)->GetObject<LteEnbNetDevice>())->HasCellId(cellId))
        {
            enbLteDevice = (*enbDevIt)->GetObject<LteEnbNetDevice>();
        }
    }
 
    NS_TEST_ASSERT_MSG_NE(enbLteDevice, nullptr, "LTE eNB device not found");
    Ptr<LteEnbRrc> enbRrc = enbLteDevice->GetRrc();
    uint16_t rnti = ueRrc->GetRnti();
    Ptr<UeManager> ueManager = enbRrc->GetUeManager(rnti);
    NS_TEST_ASSERT_MSG_NE(ueManager, nullptr, "RNTI " << rnti << " not found in eNB");
 
    UeManager::State ueManagerState = ueManager->GetState();
    NS_TEST_ASSERT_MSG_EQ(ueManagerState, UeManager::CONNECTED_NORMALLY, "Wrong UeManager state!");
    NS_ASSERT_MSG(ueManagerState == UeManager::CONNECTED_NORMALLY, "Wrong UeManager state!");
 
    uint16_t ueCellId = ueRrc->GetCellId();
    uint16_t enbCellId = enbLteDevice->GetCellId();
    uint8_t ueDlBandwidth = ueRrc->GetDlBandwidth();
    uint8_t enbDlBandwidth = enbLteDevice->GetDlBandwidth();
    uint8_t ueUlBandwidth = ueRrc->GetUlBandwidth();
    uint8_t enbUlBandwidth = enbLteDevice->GetUlBandwidth();
    uint8_t ueDlEarfcn = ueRrc->GetDlEarfcn();
    uint8_t enbDlEarfcn = enbLteDevice->GetDlEarfcn();
    uint8_t ueUlEarfcn = ueRrc->GetUlEarfcn();
    uint8_t enbUlEarfcn = enbLteDevice->GetUlEarfcn();
    uint64_t ueImsi = ueLteDevice->GetImsi();
    uint64_t enbImsi = ueManager->GetImsi();
 
    NS_TEST_ASSERT_MSG_EQ(ueImsi, enbImsi, "inconsistent IMSI");
    NS_TEST_ASSERT_MSG_EQ(ueCellId, enbCellId, "inconsistent CellId");
    NS_TEST_ASSERT_MSG_EQ(ueDlBandwidth, enbDlBandwidth, "inconsistent DlBandwidth");
    NS_TEST_ASSERT_MSG_EQ(ueUlBandwidth, enbUlBandwidth, "inconsistent UlBandwidth");
    NS_TEST_ASSERT_MSG_EQ(ueDlEarfcn, enbDlEarfcn, "inconsistent DlEarfcn");
    NS_TEST_ASSERT_MSG_EQ(ueUlEarfcn, enbUlEarfcn, "inconsistent UlEarfcn");
 
    ObjectMapValue enbDataRadioBearerMapValue;
    ueManager->GetAttribute("DataRadioBearerMap", enbDataRadioBearerMapValue);
    NS_TEST_ASSERT_MSG_EQ(enbDataRadioBearerMapValue.GetN(), 1 + 1, "wrong num bearers at eNB");
 
    ObjectMapValue ueDataRadioBearerMapValue;
    ueRrc->GetAttribute("DataRadioBearerMap", ueDataRadioBearerMapValue);
    NS_TEST_ASSERT_MSG_EQ(ueDataRadioBearerMapValue.GetN(), 1 + 1, "wrong num bearers at UE");
 
    auto enbBearerIt = enbDataRadioBearerMapValue.Begin();
    auto ueBearerIt = ueDataRadioBearerMapValue.Begin();
    while (enbBearerIt != enbDataRadioBearerMapValue.End() &&
           ueBearerIt != ueDataRadioBearerMapValue.End())
    {
        Ptr<LteDataRadioBearerInfo> enbDrbInfo =
            enbBearerIt->second->GetObject<LteDataRadioBearerInfo>();
        Ptr<LteDataRadioBearerInfo> ueDrbInfo =
            ueBearerIt->second->GetObject<LteDataRadioBearerInfo>();
        NS_TEST_ASSERT_MSG_EQ((uint32_t)enbDrbInfo->m_epsBearerIdentity,
                              (uint32_t)ueDrbInfo->m_epsBearerIdentity,
                              "epsBearerIdentity differs");
        NS_TEST_ASSERT_MSG_EQ((uint32_t)enbDrbInfo->m_drbIdentity,
                              (uint32_t)ueDrbInfo->m_drbIdentity,
                              "drbIdentity differs");
        NS_TEST_ASSERT_MSG_EQ((uint32_t)enbDrbInfo->m_logicalChannelIdentity,
                              (uint32_t)ueDrbInfo->m_logicalChannelIdentity,
                              "logicalChannelIdentity differs");
 
        ++enbBearerIt;
        ++ueBearerIt;
    }
    NS_ASSERT_MSG(enbBearerIt == enbDataRadioBearerMapValue.End(), "too many bearers at eNB");
    NS_ASSERT_MSG(ueBearerIt == ueDataRadioBearerMapValue.End(), "too many bearers at UE");
}
 
void
LteRadioLinkFailureTestCase::CheckIdle(Ptr<NetDevice> ueDevice, NetDeviceContainer enbDevices)
{
    NS_LOG_FUNCTION(ueDevice);
 
    Ptr<LteUeNetDevice> ueLteDevice = ueDevice->GetObject<LteUeNetDevice>();
    Ptr<LteUeRrc> ueRrc = ueLteDevice->GetRrc();
    uint16_t rnti = ueRrc->GetRnti();
    uint32_t numEnbDevices = enbDevices.GetN();
    bool ueManagerFound = false;
 
    switch (numEnbDevices)
    {
    // 1 eNB
    case 1:
        NS_TEST_ASSERT_MSG_EQ(ueRrc->GetState(),
                              LteUeRrc::IDLE_CELL_SEARCH,
                              "Wrong LteUeRrc state!");
        ueManagerFound = CheckUeExistAtEnb(rnti, enbDevices.Get(0));
        NS_TEST_ASSERT_MSG_EQ(ueManagerFound,
                              false,
                              "Unexpected RNTI with value " << rnti << " found in eNB");
        break;
    // 2 eNBs
    case 2:
        NS_TEST_ASSERT_MSG_EQ(ueRrc->GetState(),
                              LteUeRrc::CONNECTED_NORMALLY,
                              "Wrong LteUeRrc state!");
        ueManagerFound = CheckUeExistAtEnb(rnti, enbDevices.Get(1));
        NS_TEST_ASSERT_MSG_EQ(ueManagerFound,
                              true,
                              "RNTI " << rnti << " is not attached to the eNB");
        break;
    default:
        NS_FATAL_ERROR("The RRC state of the UE in more then 2 eNB scenario is not defined. "
                       "Consider creating more cases");
        break;
    }
}
 
bool
LteRadioLinkFailureTestCase::CheckUeExistAtEnb(uint16_t rnti, Ptr<NetDevice> enbDevice)
{
    NS_LOG_FUNCTION(this << rnti);
    Ptr<LteEnbNetDevice> enbLteDevice = DynamicCast<LteEnbNetDevice>(enbDevice);
    NS_ABORT_MSG_IF(!enbLteDevice, "LTE eNB device not found");
    Ptr<LteEnbRrc> enbRrc = enbLteDevice->GetRrc();
    bool ueManagerFound = enbRrc->HasUeManager(rnti);
    return ueManagerFound;
}
 
void
LteRadioLinkFailureTestCase::UeStateTransitionCallback(std::string context,
                                                       uint64_t imsi,
                                                       uint16_t cellId,
                                                       uint16_t rnti,
                                                       LteUeRrc::State oldState,
                                                       LteUeRrc::State newState)
{
    NS_LOG_FUNCTION(this << imsi << cellId << rnti << oldState << newState);
    m_lastState = newState;
}
 
void
LteRadioLinkFailureTestCase::ConnectionEstablishedEnbCallback(std::string context,
                                                              uint64_t imsi,
                                                              uint16_t cellId,
                                                              uint16_t rnti)
{
    NS_LOG_FUNCTION(this << imsi << cellId << rnti);
}
 
void
LteRadioLinkFailureTestCase::ConnectionEstablishedUeCallback(std::string context,
                                                             uint64_t imsi,
                                                             uint16_t cellId,
                                                             uint16_t rnti)
{
    NS_LOG_FUNCTION(this << imsi << cellId << rnti);
    NS_TEST_ASSERT_MSG_EQ(m_numOfOutOfSyncIndications,
                          0,
                          "radio link failure detection should start only in RRC CONNECTED state");
    NS_TEST_ASSERT_MSG_EQ(m_numOfInSyncIndications,
                          0,
                          "radio link failure detection should start only in RRC CONNECTED state");
}
 
void
LteRadioLinkFailureTestCase::ConnectionReleaseAtEnbCallback(std::string context,
                                                            uint64_t imsi,
                                                            uint16_t cellId,
                                                            uint16_t rnti)
{
    NS_LOG_FUNCTION(this << imsi << cellId << rnti);
}
 
void
LteRadioLinkFailureTestCase::PhySyncDetectionCallback(std::string context,
                                                      uint64_t imsi,
                                                      uint16_t rnti,
                                                      uint16_t cellId,
                                                      std::string type,
                                                      uint8_t count)
{
    NS_LOG_FUNCTION(this << imsi << cellId << rnti);
    if (type == "Notify out of sync")
    {
        m_numOfOutOfSyncIndications = count;
    }
    else if (type == "Notify in sync")
    {
        m_numOfInSyncIndications = count;
    }
}
 
void
LteRadioLinkFailureTestCase::RadioLinkFailureCallback(std::string context,
                                                      uint64_t imsi,
                                                      uint16_t cellId,
                                                      uint16_t rnti)
{
    NS_LOG_FUNCTION(this << imsi << cellId << rnti);
    NS_LOG_DEBUG("RLF at " << Simulator::Now());
    m_radioLinkFailureDetected = true;
    // The value of N310 is hard coded to the default value 1
    NS_TEST_ASSERT_MSG_EQ(
        m_numOfOutOfSyncIndications,
        1,
        "wrong number of out-of-sync indications detected, check configured value for N310");
    // The value of N311 is hard coded to the default value 1
    NS_TEST_ASSERT_MSG_LT(
        m_numOfInSyncIndications,
        1,
        "wrong number of out-of-sync indications detected, check configured value for N311");
    // Reset the counter for the next RRC connection establishment.
    m_numOfOutOfSyncIndications = 0;
}