lte-test-secondary-cell-selection.cc

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/*
 * Copyright (c) 2017 Alexander Krotov
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Alexander Krotov <krotov@iitp.ru>
 *
 */
 
#include "lte-test-secondary-cell-selection.h"
 
#include <ns3/boolean.h>
#include <ns3/double.h>
#include <ns3/friis-spectrum-propagation-loss.h>
#include <ns3/integer.h>
#include <ns3/internet-stack-helper.h>
#include <ns3/ipv4-address-helper.h>
#include <ns3/ipv4-interface-container.h>
#include <ns3/ipv4-static-routing-helper.h>
#include <ns3/log.h>
#include <ns3/lte-enb-net-device.h>
#include <ns3/lte-helper.h>
#include <ns3/lte-ue-net-device.h>
#include <ns3/lte-ue-rrc.h>
#include <ns3/mobility-helper.h>
#include <ns3/net-device-container.h>
#include <ns3/node-container.h>
#include <ns3/point-to-point-epc-helper.h>
#include <ns3/point-to-point-helper.h>
#include <ns3/simulator.h>
 
using namespace ns3;
 
NS_LOG_COMPONENT_DEFINE("LteSecondaryCellSelectionTest");
 
/*
 * Test Suite
 */
 
LteSecondaryCellSelectionTestSuite::LteSecondaryCellSelectionTestSuite()
    : TestSuite("lte-secondary-cell-selection", SYSTEM)
{
    // REAL RRC PROTOCOL, either 2 or 4 UEs connecting to 2 or 4 component carriers
 
    AddTestCase(new LteSecondaryCellSelectionTestCase("EPC, real RRC, RngRun=1", false, 1U, 2),
                TestCase::QUICK);
    AddTestCase(new LteSecondaryCellSelectionTestCase("EPC, real RRC, RngRun=1", false, 1U, 4),
                TestCase::QUICK);
 
    // IDEAL RRC PROTOCOL, either 2 or 4 UEs connecting to 2 or 4 component carriers
 
    AddTestCase(new LteSecondaryCellSelectionTestCase("EPC, ideal RRC, RngRun=1", true, 1U, 2),
                TestCase::QUICK);
    AddTestCase(new LteSecondaryCellSelectionTestCase("EPC, ideal RRC, RngRun=1", true, 1U, 4),
                TestCase::QUICK);
 
} // end of LteSecondaryCellSelectionTestSuite::LteSecondaryCellSelectionTestSuite ()
 
static LteSecondaryCellSelectionTestSuite g_lteSecondaryCellSelectionTestSuite;
 
/*
 * Test Case
 */
 
LteSecondaryCellSelectionTestCase::LteSecondaryCellSelectionTestCase(
    std::string name,
    bool isIdealRrc,
    uint64_t rngRun,
    uint8_t numberOfComponentCarriers)
    : TestCase(name),
      m_isIdealRrc(isIdealRrc),
      m_rngRun(rngRun),
      m_numberOfComponentCarriers(numberOfComponentCarriers)
{
    NS_LOG_FUNCTION(this << GetName());
}
 
LteSecondaryCellSelectionTestCase::~LteSecondaryCellSelectionTestCase()
{
    NS_LOG_FUNCTION(this << GetName());
}
 
void
LteSecondaryCellSelectionTestCase::DoRun()
{
    NS_LOG_FUNCTION(this << GetName());
 
    Config::SetGlobal("RngRun", UintegerValue(m_rngRun));
 
    // Create helpers.
    auto lteHelper = CreateObject<LteHelper>();
    lteHelper->SetAttribute("PathlossModel",
                            TypeIdValue(ns3::FriisSpectrumPropagationLossModel::GetTypeId()));
    lteHelper->SetAttribute("UseIdealRrc", BooleanValue(m_isIdealRrc));
    lteHelper->SetAttribute("NumberOfComponentCarriers",
                            UintegerValue(m_numberOfComponentCarriers));
 
    auto epcHelper = CreateObject<PointToPointEpcHelper>();
    lteHelper->SetEpcHelper(epcHelper);
 
    // Create nodes.
    auto enbNode = CreateObject<Node>();
    NodeContainer ueNodes;
    ueNodes.Create(m_numberOfComponentCarriers);
 
    MobilityHelper mobility;
    mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
    mobility.Install(enbNode);
    mobility.Install(ueNodes);
 
    // Physical layer.
    auto enbDev = DynamicCast<LteEnbNetDevice>(lteHelper->InstallEnbDevice(enbNode).Get(0));
    auto ueDevs = lteHelper->InstallUeDevice(ueNodes);
 
    // Network layer.
    InternetStackHelper internet;
    internet.Install(ueNodes);
    epcHelper->AssignUeIpv4Address(ueDevs);
 
    auto ueDev = DynamicCast<LteUeNetDevice>(ueDevs.Get(0));
    std::map<uint8_t, Ptr<ComponentCarrierUe>> ueCcMap = ueDev->GetCcMap();
    for (auto it : ueCcMap)
    {
        NS_LOG_DEBUG("Assign DL EARFCN " << it.second->GetDlEarfcn() << " to UE "
                                         << ueDevs.Get(it.first)->GetNode()->GetId());
        DynamicCast<LteUeNetDevice>(ueDevs.Get(it.first))->SetDlEarfcn(it.second->GetDlEarfcn());
    }
 
    // Enable Idle mode cell selection.
    lteHelper->Attach(ueDevs);
 
    // Connect to trace sources in UEs
    Config::Connect(
        "/NodeList/*/DeviceList/*/LteUeRrc/StateTransition",
        MakeCallback(&LteSecondaryCellSelectionTestCase::StateTransitionCallback, this));
    Config::Connect(
        "/NodeList/*/DeviceList/*/LteUeRrc/ConnectionEstablished",
        MakeCallback(&LteSecondaryCellSelectionTestCase::ConnectionEstablishedCallback, this));
 
    // Run simulation.
    Simulator::Stop(Seconds(2.0));
    Simulator::Run();
 
    for (auto& it : enbDev->GetCcMap())
    {
        ueDev = DynamicCast<LteUeNetDevice>(ueDevs.Get(it.first));
        uint16_t expectedCellId = it.second->GetCellId();
        uint16_t actualCellId = ueDev->GetRrc()->GetCellId();
        NS_LOG_DEBUG("RNTI " << ueDev->GetRrc()->GetRnti()
                             << " attached to cell ID: " << actualCellId);
        NS_TEST_ASSERT_MSG_EQ(expectedCellId,
                              actualCellId,
                              "IMSI " << ueDev->GetImsi() << " has attached to an unexpected cell");
 
        NS_TEST_ASSERT_MSG_EQ(m_lastState.at(ueDev->GetImsi()),
                              LteUeRrc::CONNECTED_NORMALLY,
                              "UE " << ueDev->GetImsi() << " is not at CONNECTED_NORMALLY state");
    }
 
    // Destroy simulator.
    Simulator::Destroy();
} // end of void LteSecondaryCellSelectionTestCase::DoRun ()
 
void
LteSecondaryCellSelectionTestCase::StateTransitionCallback(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 << LteUeRrc::ToString(oldState)
                         << LteUeRrc::ToString(newState));
    m_lastState[imsi] = newState;
}
 
void
LteSecondaryCellSelectionTestCase::ConnectionEstablishedCallback(std::string context,
                                                                 uint64_t imsi,
                                                                 uint16_t cellId,
                                                                 uint16_t rnti)
{
    NS_LOG_FUNCTION(this << imsi << cellId << rnti);
}