Buildings and SINR in ns3-LENA

[Marco Giordani]

Hi everybody, 

I am new in the ns3's world so maybe this question can be very easily solvable. 

I'm trying to study the effect on SINR caused by a building placed in a very simple scenario. There is one omnidirectional BS transmitting, and I expect to see that, when the signal pass through the building's walls, it results to be attenuated, in terms of SINR. However, the REM map (that I attach here) shows that it's like the building doesn't affect the whole scenario. This is my code:

#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/mobility-module.h"
#include "ns3/lte-module.h"
#include "ns3/antenna-model.h"
#include "ns3/isotropic-antenna-model.h"
#include "ns3/config-store.h"
#include "ns3/building.h"
#include "ns3/buildings-helper.h"
#include "ns3/mobility-building-info.h"
#include <ns3/buildings-module.h>
#include "ns3/hybrid-buildings-propagation-loss-model.h"
#include "ns3/oh-buildings-propagation-loss-model.h"

using namespace ns3;

int main (int argc, char *argv[])
{

 double speed =  50.0;
 double initialPosition = 0.0;
 double enbTxPowerDbm = 30.0;
 double ueNoiseFigure = 5.0;


 CommandLine cmd;
 cmd.AddValue ("enbTxPowerDbm", "TX power [dBm] (default = 30.0dBm)", enbTxPowerDbm);
 cmd.AddValue ("ueNoiseFigure", "User noise figure [dB] (default = 5.0dB)", ueNoiseFigure);
 cmd.Parse (argc, argv);


 ConfigStore inputConfig;
 inputConfig.ConfigureDefaults ();

 // Parse again so you can override default values from the command line
 cmd.Parse (argc, argv);

 Ptr<LteHelper> lteHelper = CreateObject<LteHelper> ();

 //BUILDING CREATION
 double x_min = 4.0;
 double x_max = 20.0;
 double y_min = -10.0;
 double y_max = 20.0;
 double z_min = -10.0;
 double z_max = 10.0;
 Ptr<Building> b = CreateObject <Building> ();
 b->SetBoundaries (Box (x_min, x_max, y_min, y_max, z_min, z_max));
 b->SetBuildingType (Building::Residential);
 b->SetExtWallsType (Building::ConcreteWithWindows);
 b->SetNFloors (3);
 b->SetNRoomsX (3);
 b->SetNRoomsY (2);

 // Create Nodes: eNodeB and UE
 NodeContainer enbNodes;
 NodeContainer ueNodes;
 enbNodes.Create (1);
 ueNodes.Create (1);

 // MOBILITY OF ENB
 Ptr<ListPositionAllocator> enbPositionAlloc = CreateObject<ListPositionAllocator> ();
 enbPositionAlloc->Add(Vector(0.0,0.0,0.1));
 MobilityHelper enbMobility;
 enbMobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
 enbMobility.SetPositionAllocator(enbPositionAlloc);
 enbMobility.Install (enbNodes);
 BuildingsHelper::Install (enbNodes);


 // MOBILITY OF UE
 Ptr<ListPositionAllocator> uePositionAlloc = CreateObject<ListPositionAllocator> ();
 uePositionAlloc->Add(Vector(initialPosition,0.0,0.1));
 MobilityHelper ueMobility;
 ueMobility.SetMobilityModel ("ns3::ConstantVelocityMobilityModel");
 ueMobility.SetPositionAllocator(uePositionAlloc);
 ueMobility.Install (ueNodes);
 ueNodes.Get(0)->GetObject<ConstantVelocityMobilityModel>()->SetVelocity(Vector (speed,0.0,0.0));
 BuildingsHelper::Install (ueNodes);

 // SET PARAMETERS OF TX
 Config::SetDefault ("ns3::LteEnbPhy::TxPower", DoubleValue (enbTxPowerDbm));
 Config::SetDefault ("ns3::LteUePhy::NoiseFigure", DoubleValue (ueNoiseFigure));

 // Create Devices and install them in the Nodes (eNB and UE)
 NetDeviceContainer enbDevs;
 NetDeviceContainer ueDevs;

 enbDevs = lteHelper->InstallEnbDevice (enbNodes);
 ueDevs = lteHelper->InstallUeDevice (ueNodes);


 // Attach a UE to a eNB
 lteHelper->Attach (ueDevs, enbDevs.Get (0));

 // Activate a data radio bearer
 enum EpsBearer::Qci q = EpsBearer::GBR_CONV_VOICE;
 EpsBearer bearer (q);
 lteHelper->ActivateDataRadioBearer (ueDevs, bearer);
 lteHelper->EnableDlPhyTraces();


 BuildingsHelper::MakeMobilityModelConsistent ();

 Simulator::Stop (Seconds (5));
 Simulator::Run ();
 Simulator::Destroy ();
 return 0;
}

What am I skipping, in the code? How can I study the effect of the building? 

Thanks for you time!

[David Palacios Campos]

Hi Marco,

did you finally find any reason for the simulator to obviate the losses due to the buildings?

Thanks,

David

[Marco Miozzo]

Hi David,

I did not get the question, may I ask you to provide me more info.

Best,

marco.

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[arash mohammadi]

 

Hi Marco

you Skip a code that sets propagation loss model to simulation, such as:

     // lteHelper->SetAttribute ("PathlossModel", StringValue ("ns3::HybridBuildingsPropagationLossModel")); \\

try it.