To Implement Massive Machine Type Communication (mMTC) in ns-3, a large number of devices communicating with each other or a central server for simulation. For a large number of devices (sensors, actuators, etc.) to send small packets of data intermittently mMTC act as a key aspect of IoT. All the key aspects of IOT are handled by us reach out for best programming support. Here the given below steps guide on how to set up an mMTC scenario in ns-3.
Step-by-Step Implementation of Massive Machine Type Communication in ns3
- Install ns3
Confirm that ns3 is installed on the system.
- Define the Network Topology
Define the network topology including:
- Several machine-type communication (MTC) devices (sensors, actuators)
- Central server or base station
- Create Network Nodes
Create network nodes using NodeContainer.
NodeContainer mtcDevices, serverNode;
mtcDevices.Create(100); // Create 100 MTC devices
serverNode.Create(1); // Create 1 server node
- Set Up Network Devices
Install network devices on the nodes using appropriate network interfaces, such as WiFi or LTE for wireless communication.
Using WiFi
WifiHelper wifi;
wifi.SetStandard(WIFI_PHY_STANDARD_80211n_2_4GHZ);
WifiMacHelper mac;
mac.SetType(“ns3::AdhocWifiMac”);
YansWifiPhyHelper phy = YansWifiPhyHelper::Default();
YansWifiChannelHelper channel = YansWifiChannelHelper::Default();
phy.SetChannel(channel.Create());
NetDeviceContainer mtcDevicesNet = wifi.Install(phy, mac, mtcDevices);
NetDeviceContainer serverNet = wifi.Install(phy, mac, serverNode);
Using LTE
Using LTE for better scalability in mMTC scenarios:
Ptr<LteHelper> lteHelper = CreateObject<LteHelper>();
Ptr<PointToPointEpcHelper> epcHelper = CreateObject<PointToPointEpcHelper>();
lteHelper->SetEpcHelper(epcHelper);
Ptr<Node> pgw = epcHelper->GetPgwNode();
NodeContainer enbNodes;
enbNodes.Create(1);
NetDeviceContainer enbDevs = lteHelper->InstallEnbDevice(enbNodes);
NetDeviceContainer mtcDevicesDevs = lteHelper->InstallUeDevice(mtcDevices);
internet.Install(mtcDevices);
internet.Install(serverNode);
Ipv4InterfaceContainer mtcDevicesIpIfaces;
Ipv4StaticRoutingHelper ipv4RoutingHelper;
for (uint32_t i = 0; i < mtcDevices.GetN(); ++i) {
Ptr<Node> ueNode = mtcDevices.Get(i);
Ipv4InterfaceContainerueIpIface=epcHelper->AssignUeIpv4Address(NetDeviceContainer(mtcDevicesDevs.Get(i)));
mtcDevicesIpIfaces.Add(ueIpIface);
Ptr<Ipv4StaticRouting> ueStaticRouting = ipv4RoutingHelper.GetStaticRouting(ueNode->GetObject<Ipv4>());
ueStaticRouting->SetDefaultRoute(epcHelper->GetUeDefaultGatewayAddress(), 1);
}
lteHelper->Attach(mtcDevicesDevs, enbDevs.Get(0));
- Configure Mobility Model
Set up the mobility model for the nodes to simulate fixed positions typical in mMTC environments.
MobilityHelper mobility;
mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);
mobility.Install(mtcDevices);
mobility.Install(serverNode);
- Set Up Routing Protocols
Configure routing protocols for the network. For a simple WiFi setup, the default routing provided by the Internet stack should suffice.
- Implement mMTC Applications
Create applications that simulate mMTC functionalities. Below is an example of a simple application that simulates devices sending data to a central server intermittently.
MTC Device Application
class MTCDeviceApplication : public Application {
public:
void StartApplication() override {
sendSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
InetSocketAddress remote = InetSocketAddress(serverAddress, serverPort);
sendSocket->Connect(remote);
// Schedule the first data send
Simulator::Schedule(Seconds(1.0), &MTCDeviceApplication::SendData, this);
}
void SetServerAddress(Ipv4Address address, uint16_t port) {
serverAddress = address;
serverPort = port;
}
void SendData() {
std::ostringstream msg;
msg << “Data from MTC device ” << GetNode()->GetId();
Ptr<Packet> packet = Create<Packet>((uint8_t*) msg.str().c_str(), msg.str().size());
sendSocket->Send(packet);
// Schedule the next data send
Simulator::Schedule(Seconds(5.0 + 5.0 * ((double)rand() / RAND_MAX)), &MTCDeviceApplication::SendData, this);
}
private:
Ptr<Socket> sendSocket;
Ipv4Address serverAddress;
uint16_t serverPort;
};
Server Application
class ServerApplication : public Application {
public:
void StartApplication() override {
recvSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
recvSocket->Bind(InetSocketAddress(Ipv4Address::GetAny(), localPort));
recvSocket->SetRecvCallback(MakeCallback(&ServerApplication::HandleRead, this));
}
void SetLocalPort(uint16_t port) {
localPort = port;
}
void HandleRead(Ptr<Socket> socket) {
Ptr<Packet> packet;
Address from;
while ((packet = socket->RecvFrom(from))) {
std::cout<<“Serverreceiveddatafrom”<< InetSocketAddress::ConvertFrom(from).GetIpv4() << std::endl;
}
}
private:
Ptr<Socket> recvSocket;
uint16_t localPort;
};
- Install Applications
Install the applications on the nodes.
ApplicationContainer mtcApps, serverApps;
// Install MTC device applications
for (uint32_t i = 0; i < mtcDevices.GetN(); ++i) {
Ptr<MTCDeviceApplication> app = CreateObject<MTCDeviceApplication>();
app->SetServerAddress(serverNode.Get(0)->GetObject<Ipv4>()->GetAddress(1, 0).GetLocal(), 9);
mtcDevices.Get(i)->AddApplication(app);
app->SetStartTime(Seconds(1.0 + i * 0.1));
app->SetStopTime(Seconds(100.0));
mtcApps.Add(app);
}
// Install server application
Ptr<ServerApplication> serverApp = CreateObject<ServerApplication>();
serverApp->SetLocalPort(9);
serverNode.Get(0)->AddApplication(serverApp);
serverApp->SetStartTime(Seconds(1.0));
serverApp->SetStopTime(Seconds(100.0));
serverApps.Add(serverApp);
- Run the Simulation
Configure the simulation runtime and execute it.
Simulator::Stop(Seconds(100.0));
Simulator::Run();
Simulator::Destroy();
Example of a Simple mMTC Network Script
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/wifi-module.h”
#include “ns3/mobility-module.h”
#include “ns3/applications-module.h”
using namespace ns3;
class MTCDeviceApplication : public Application {
public:
void StartApplication() override {
sendSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
InetSocketAddress remote = InetSocketAddress(serverAddress, serverPort);
sendSocket->Connect(remote);
// Schedule the first data send
Simulator::Schedule(Seconds(1.0), &MTCDeviceApplication::SendData, this);
}
void SetServerAddress(Ipv4Address address, uint16_t port) {
serverAddress = address;
serverPort = port;
}
void SendData() {
std::ostringstream msg;
msg << “Data from MTC device ” << GetNode()->GetId();
Ptr<Packet> packet = Create<Packet>((uint8_t*) msg.str().c_str(), msg.str().size());
sendSocket->Send(packet);
// Schedule the next data send
Simulator::Schedule(Seconds(5.0 + 5.0 * ((double)rand() / RAND_MAX)), &MTCDeviceApplication::SendData, this);
}
private:
Ptr<Socket> sendSocket;
Ipv4Address serverAddress;
uint16_t serverPort;
};
class ServerApplication : public Application {
public:
void StartApplication() override {
recvSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
recvSocket->Bind(InetSocketAddress(Ipv4Address::GetAny(), localPort));
recvSocket->SetRecvCallback(MakeCallback(&ServerApplication::HandleRead, this));
}
void SetLocalPort(uint16_t port) {
localPort = port;
}
void HandleRead(Ptr<Socket> socket) {
Ptr<Packet> packet;
Address from;
while ((packet = socket->RecvFrom(from))) {
std::cout << “Server received data from ” << InetSocketAddress::ConvertFrom(from).GetIpv4() << std::endl;
}
}
private:
Ptr<Socket> recvSocket;
uint16_t localPort;
};
int main(int argc, char *argv[]) {
NodeContainer mtcDevices, serverNode;
mtcDevices.Create(100);
serverNode.Create(1);
// WiFi setup
WifiHelper wifi;
wifi.SetStandard(WIFI_PHY_STANDARD_80211n_2_4GHZ);
WifiMacHelper mac;
mac.SetType(“ns3::AdhocWifiMac”);
YansWifiPhyHelper phy = YansWifiPhyHelper::Default();
YansWifiChannelHelper channel = YansWifiChannelHelper::Default();
phy.SetChannel(channel.Create());
NetDeviceContainer mtcDevicesNet = wifi.Install(phy, mac, mtcDevices);
NetDeviceContainer serverNet = wifi.Install(phy, mac, serverNode);
// Mobility setup
MobilityHelper mobility;
mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);
mobility.Install(mtcDevices);
mobility.Install(serverNode);
// Internet stack and routing
InternetStackHelper internet;
internet.Install(mtcDevices);
internet.Install(serverNode);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer mtcDevicesInterfaces = address.Assign(mtcDevicesNet);
Ipv4InterfaceContainer serverInterface = address.Assign(serverNet);
// Install applications
ApplicationContainer mtcApps, serverApps;
// Install MTC device applications
for (uint32_t i = 0; i < mtcDevices.GetN(); ++i) {
Ptr<MTCDeviceApplication> app = CreateObject<MTCDeviceApplication>();
app->SetServerAddress(serverNode.Get(0)->GetObject<Ipv4>()->GetAddress(1, 0).GetLocal(), 9);
mtcDevices.Get(i)->AddApplication(app);
app->SetStartTime(Seconds(1.0 + i * 0.1));
app->SetStopTime(Seconds(100.0));
mtcApps.Add(app);
}
// Install server application
Ptr<ServerApplication> serverApp = CreateObject<ServerApplication>();
serverApp->SetLocalPort(9);
serverNode.Get(0)->AddApplication(serverApp);
serverApp->SetStartTime(Seconds(1.0));
serverApp->SetStopTime(Seconds(100.0));
serverApps.Add(serverApp);
Simulator::Stop(Seconds(100.0));
Simulator::Run();
Simulator::Destroy();
return
}
Implementing Massive Machine Type Communication (mMTC) in ns3 environment was explained clearly with some example scripts and simulated with large number of devices. For additional assistance with implementation, feel free to contact our team.