complete-network-example.cc

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/*
 * Copyright (c) 2017 University of Padova
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Author: Davide Magrin <magrinda@dei.unipd.it>
 */
 
/*
 * This script simulates a complex scenario with multiple gateways and end
 * devices. The metric of interest for this script is the throughput of the
 * network.
 */
 
#include "ns3/buildings-module.h"
#include "ns3/core-module.h"
#include "ns3/lorawan-module.h"
#include "ns3/mobility-helper.h"
#include "ns3/point-to-point-helper.h"
 
using namespace ns3;
using namespace lorawan;
 
NS_LOG_COMPONENT_DEFINE("ComplexLorawanNetworkExample");
 
// Network settings
int nDevices = 200;                 //!< Number of end device nodes to create
int nGateways = 1;                  //!< Number of gateway nodes to create
double radiusMeters = 6400;         //!< Radius (m) of the deployment
double simulationTimeSeconds = 600; //!< Scenario duration (s) in simulated time
 
// Channel model
bool realisticChannelModel = false; //!< Whether to use a more realistic channel model with
                                    //!< Buildings and correlated shadowing
 
int appPeriodSeconds = 600; //!< Duration (s) of the inter-transmission time of end devices
 
// Output control
bool printBuildingInfo = true; //!< Whether to print building information
 
int
main(int argc, char* argv[])
{
    CommandLine cmd(__FILE__);
    cmd.AddValue("nDevices", "Number of end devices to include in the simulation", nDevices);
    cmd.AddValue("radius", "The radius (m) of the area to simulate", radiusMeters);
    cmd.AddValue("realisticChannel",
                 "Whether to use a more realistic channel model",
                 realisticChannelModel);
    cmd.AddValue("simulationTime", "The time (s) for which to simulate", simulationTimeSeconds);
    cmd.AddValue("appPeriod",
                 "The period in seconds to be used by periodically transmitting applications",
                 appPeriodSeconds);
    cmd.AddValue("print", "Whether or not to print building information", printBuildingInfo);
    cmd.Parse(argc, argv);
 
    // Set up logging
    LogComponentEnable("ComplexLorawanNetworkExample", LOG_LEVEL_ALL);
    // LogComponentEnable("LoraChannel", LOG_LEVEL_INFO);
    // LogComponentEnable("LoraPhy", LOG_LEVEL_ALL);
    // LogComponentEnable("EndDeviceLoraPhy", LOG_LEVEL_ALL);
    // LogComponentEnable("GatewayLoraPhy", LOG_LEVEL_ALL);
    // LogComponentEnable("LoraInterferenceHelper", LOG_LEVEL_ALL);
    // LogComponentEnable("LorawanMac", LOG_LEVEL_ALL);
    // LogComponentEnable("EndDeviceLorawanMac", LOG_LEVEL_ALL);
    // LogComponentEnable("ClassAEndDeviceLorawanMac", LOG_LEVEL_ALL);
    // LogComponentEnable("GatewayLorawanMac", LOG_LEVEL_ALL);
    // LogComponentEnable("LogicalLoraChannelHelper", LOG_LEVEL_ALL);
    // LogComponentEnable("LogicalLoraChannel", LOG_LEVEL_ALL);
    // LogComponentEnable("LoraHelper", LOG_LEVEL_ALL);
    // LogComponentEnable("LoraPhyHelper", LOG_LEVEL_ALL);
    // LogComponentEnable("LorawanMacHelper", LOG_LEVEL_ALL);
    // LogComponentEnable("PeriodicSenderHelper", LOG_LEVEL_ALL);
    // LogComponentEnable("PeriodicSender", LOG_LEVEL_ALL);
    // LogComponentEnable("LorawanMacHeader", LOG_LEVEL_ALL);
    // LogComponentEnable("LoraFrameHeader", LOG_LEVEL_ALL);
    // LogComponentEnable("NetworkScheduler", LOG_LEVEL_ALL);
    // LogComponentEnable("NetworkServer", LOG_LEVEL_ALL);
    // LogComponentEnable("NetworkStatus", LOG_LEVEL_ALL);
    // LogComponentEnable("NetworkController", LOG_LEVEL_ALL);
 
    /***********
     *  Setup  *
     ***********/
 
    // Create the time value from the period
    Time appPeriod = Seconds(appPeriodSeconds);
 
    // Mobility
    MobilityHelper mobility;
    mobility.SetPositionAllocator("ns3::UniformDiscPositionAllocator",
                                  "rho",
                                  DoubleValue(radiusMeters),
                                  "X",
                                  DoubleValue(0.0),
                                  "Y",
                                  DoubleValue(0.0));
    mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
 
    /************************
     *  Create the channel  *
     ************************/
 
    // Create the lora channel object
    Ptr<LogDistancePropagationLossModel> loss = CreateObject<LogDistancePropagationLossModel>();
    loss->SetPathLossExponent(3.76);
    loss->SetReference(1, 7.7);
 
    if (realisticChannelModel)
    {
        // Create the correlated shadowing component
        Ptr<CorrelatedShadowingPropagationLossModel> shadowing =
            CreateObject<CorrelatedShadowingPropagationLossModel>();
 
        // Aggregate shadowing to the logdistance loss
        loss->SetNext(shadowing);
 
        // Add the effect to the channel propagation loss
        Ptr<BuildingPenetrationLoss> buildingLoss = CreateObject<BuildingPenetrationLoss>();
 
        shadowing->SetNext(buildingLoss);
    }
 
    Ptr<PropagationDelayModel> delay = CreateObject<ConstantSpeedPropagationDelayModel>();
 
    Ptr<LoraChannel> channel = CreateObject<LoraChannel>(loss, delay);
 
    /************************
     *  Create the helpers  *
     ************************/
 
    // Create the LoraPhyHelper
    LoraPhyHelper phyHelper = LoraPhyHelper();
    phyHelper.SetChannel(channel);
 
    // Create the LorawanMacHelper
    LorawanMacHelper macHelper = LorawanMacHelper();
 
    // Create the LoraHelper
    LoraHelper helper = LoraHelper();
    helper.EnablePacketTracking(); // Output filename
    // helper.EnableSimulationTimePrinting ();
 
    // Create the NetworkServerHelper
    NetworkServerHelper nsHelper = NetworkServerHelper();
 
    // Create the ForwarderHelper
    ForwarderHelper forHelper = ForwarderHelper();
 
    /************************
     *  Create End Devices  *
     ************************/
 
    // Create a set of nodes
    NodeContainer endDevices;
    endDevices.Create(nDevices);
 
    // Assign a mobility model to each node
    mobility.Install(endDevices);
 
    // Make it so that nodes are at a certain height > 0
    for (auto j = endDevices.Begin(); j != endDevices.End(); ++j)
    {
        Ptr<MobilityModel> mobility = (*j)->GetObject<MobilityModel>();
        Vector position = mobility->GetPosition();
        position.z = 1.2;
        mobility->SetPosition(position);
    }
 
    // Create the LoraNetDevices of the end devices
    uint8_t nwkId = 54;
    uint32_t nwkAddr = 1864;
    Ptr<LoraDeviceAddressGenerator> addrGen =
        CreateObject<LoraDeviceAddressGenerator>(nwkId, nwkAddr);
 
    // Create the LoraNetDevices of the end devices
    macHelper.SetAddressGenerator(addrGen);
    phyHelper.SetDeviceType(LoraPhyHelper::ED);
    macHelper.SetDeviceType(LorawanMacHelper::ED_A);
    helper.Install(phyHelper, macHelper, endDevices);
 
    // Now end devices are connected to the channel
 
    // Connect trace sources
    for (auto j = endDevices.Begin(); j != endDevices.End(); ++j)
    {
        Ptr<Node> node = *j;
        Ptr<LoraNetDevice> loraNetDevice = DynamicCast<LoraNetDevice>(node->GetDevice(0));
        Ptr<LoraPhy> phy = loraNetDevice->GetPhy();
    }
 
    /*********************
     *  Create Gateways  *
     *********************/
 
    // Create the gateway nodes (allocate them uniformly on the disc)
    NodeContainer gateways;
    gateways.Create(nGateways);
 
    Ptr<ListPositionAllocator> allocator = CreateObject<ListPositionAllocator>();
    // Make it so that nodes are at a certain height > 0
    allocator->Add(Vector(0.0, 0.0, 15.0));
    mobility.SetPositionAllocator(allocator);
    mobility.Install(gateways);
 
    // Create a netdevice for each gateway
    phyHelper.SetDeviceType(LoraPhyHelper::GW);
    macHelper.SetDeviceType(LorawanMacHelper::GW);
    helper.Install(phyHelper, macHelper, gateways);
 
    /**********************
     *  Handle buildings  *
     **********************/
 
    double xLength = 130;
    double deltaX = 32;
    double yLength = 64;
    double deltaY = 17;
    int gridWidth = 2 * radiusMeters / (xLength + deltaX);
    int gridHeight = 2 * radiusMeters / (yLength + deltaY);
    if (!realisticChannelModel)
    {
        gridWidth = 0;
        gridHeight = 0;
    }
    Ptr<GridBuildingAllocator> gridBuildingAllocator;
    gridBuildingAllocator = CreateObject<GridBuildingAllocator>();
    gridBuildingAllocator->SetAttribute("GridWidth", UintegerValue(gridWidth));
    gridBuildingAllocator->SetAttribute("LengthX", DoubleValue(xLength));
    gridBuildingAllocator->SetAttribute("LengthY", DoubleValue(yLength));
    gridBuildingAllocator->SetAttribute("DeltaX", DoubleValue(deltaX));
    gridBuildingAllocator->SetAttribute("DeltaY", DoubleValue(deltaY));
    gridBuildingAllocator->SetAttribute("Height", DoubleValue(6));
    gridBuildingAllocator->SetBuildingAttribute("NRoomsX", UintegerValue(2));
    gridBuildingAllocator->SetBuildingAttribute("NRoomsY", UintegerValue(4));
    gridBuildingAllocator->SetBuildingAttribute("NFloors", UintegerValue(2));
    gridBuildingAllocator->SetAttribute(
        "MinX",
        DoubleValue(-gridWidth * (xLength + deltaX) / 2 + deltaX / 2));
    gridBuildingAllocator->SetAttribute(
        "MinY",
        DoubleValue(-gridHeight * (yLength + deltaY) / 2 + deltaY / 2));
    BuildingContainer bContainer = gridBuildingAllocator->Create(gridWidth * gridHeight);
 
    BuildingsHelper::Install(endDevices);
    BuildingsHelper::Install(gateways);
 
    // Print the buildings
    if (printBuildingInfo)
    {
        std::ofstream myfile;
        myfile.open("buildings.txt");
        std::vector<Ptr<Building>>::const_iterator it;
        int j = 1;
        for (it = bContainer.Begin(); it != bContainer.End(); ++it, ++j)
        {
            Box boundaries = (*it)->GetBoundaries();
            myfile << "set object " << j << " rect from " << boundaries.xMin << ","
                   << boundaries.yMin << " to " << boundaries.xMax << "," << boundaries.yMax
                   << std::endl;
        }
        myfile.close();
    }
 
    /**********************************************
     *  Set up the end device's spreading factor  *
     **********************************************/
 
    LorawanMacHelper::SetSpreadingFactorsUp(endDevices, gateways, channel);
 
    NS_LOG_DEBUG("Completed configuration");
 
    /*********************************************
     *  Install applications on the end devices  *
     *********************************************/
 
    Time appStopTime = Seconds(simulationTimeSeconds);
    PeriodicSenderHelper appHelper = PeriodicSenderHelper();
    appHelper.SetPeriod(Seconds(appPeriodSeconds));
    appHelper.SetPacketSize(23);
    Ptr<RandomVariableStream> rv =
        CreateObjectWithAttributes<UniformRandomVariable>("Min",
                                                          DoubleValue(0),
                                                          "Max",
                                                          DoubleValue(10));
    ApplicationContainer appContainer = appHelper.Install(endDevices);
 
    appContainer.Start(Time(0));
    appContainer.Stop(appStopTime);
 
    /**************************
     *  Create network server  *
     ***************************/
 
    // Create the network server node
    Ptr<Node> networkServer = CreateObject<Node>();
 
    // PointToPoint links between gateways and server
    PointToPointHelper p2p;
    p2p.SetDeviceAttribute("DataRate", StringValue("5Mbps"));
    p2p.SetChannelAttribute("Delay", StringValue("2ms"));
    // Store network server app registration details for later
    P2PGwRegistration_t gwRegistration;
    for (auto gw = gateways.Begin(); gw != gateways.End(); ++gw)
    {
        auto container = p2p.Install(networkServer, *gw);
        auto serverP2PNetDev = DynamicCast<PointToPointNetDevice>(container.Get(0));
        gwRegistration.emplace_back(serverP2PNetDev, *gw);
    }
 
    // Create a network server for the network
    nsHelper.SetGatewaysP2P(gwRegistration);
    nsHelper.SetEndDevices(endDevices);
    nsHelper.Install(networkServer);
 
    // Create a forwarder for each gateway
    forHelper.Install(gateways);
 
    ////////////////
    // Simulation //
    ////////////////
 
    Simulator::Stop(appStopTime + Hours(1));
 
    NS_LOG_INFO("Running simulation...");
    Simulator::Run();
 
    Simulator::Destroy();
 
    ///////////////////////////
    // Print results to file //
    ///////////////////////////
    NS_LOG_INFO("Computing performance metrics...");
 
    LoraPacketTracker& tracker = helper.GetPacketTracker();
    std::cout << tracker.CountMacPacketsGlobally(Time(0), appStopTime + Hours(1)) << std::endl;
 
    return 0;
}