To Implement Ultra Reliable Low Latency Communication (URLLC) in ns-3, a highly reliable communication network should be simulated with very low latency. Our researchers have completed a comprehensive comparative analysis of all facets of Ultra Reliable Low Latency Communication. Please do not hesitate to reach out to us for unparalleled support. This mainly consists on the application such as autonomous vehicles, industrial automation, and remote surgery.
Here the detailed guide given on how to set up a basic URLLC scenario in ns-3.
Step-by-Step Implementation Ultra Reliable Low Latency Communication in ns3
- Install ns-3
Ensure that ns3 is installed on the system.
- Define the Network Topology
Define the network topology including:
- URLLC devices (sensors, actuators, etc.)
- Central server or base station
- Create Network Nodes
Create network nodes using NodeContainer.
NodeContainer urllcDevices, serverNode;
urllcDevices.Create(20); // Create 20 URLLC devices
serverNode.Create(1); // Create 1 server node
4. 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_5GHZ);
WifiMacHelper mac;
mac.SetType(“ns3::AdhocWifiMac”);
YansWifiPhyHelper phy = YansWifiPhyHelper::Default();
YansWifiChannelHelper channel = YansWifiChannelHelper::Default();
phy.SetChannel(channel.Create());
NetDeviceContainer urllcDevicesNet = wifi.Install(phy, mac, urllcDevices);
NetDeviceContainer serverNet = wifi.Install(phy, mac, serverNode);
Using LTE
If you prefer LTE for better reliability and low latency:
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 urllcDevicesDevs = lteHelper->InstallUeDevice(urllcDevices);
internet.Install(urllcDevices);
internet.Install(serverNode);
Ipv4InterfaceContainer urllcDevicesIpIfaces;
Ipv4StaticRoutingHelper ipv4RoutingHelper;
for (uint32_t i = 0; i < urllcDevices.GetN(); ++i) {
Ptr<Node> ueNode = urllcDevices.Get(i);
Ipv4InterfaceContainerueIpIface=epcHelper->AssignUeIpv4Address(NetDeviceContainer(urllcDevicesDevs.Get(i)));
urllcDevicesIpIfaces.Add(ueIpIface);
Ptr<Ipv4StaticRouting> ueStaticRouting = ipv4RoutingHelper.GetStaticRouting(ueNode->GetObject<Ipv4>());
ueStaticRouting->SetDefaultRoute(epcHelper->GetUeDefaultGatewayAddress(), 1);
}
lteHelper->Attach(urllcDevicesDevs, enbDevs.Get(0));
5. Configure Mobility Model
Set up the mobility model for the nodes to simulate fixed positions typical in URLLC environments.
MobilityHelper mobility;
mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);
mobility.Install(urllcDevices);
mobility.Install(serverNode);
6. 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.
InternetStackHelper internet;
internet.Install(urllcDevices);
internet.Install(serverNode);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer urllcDevicesInterfaces = address.Assign(urllcDevicesNet);
Ipv4InterfaceContainer serverInterface = address.Assign(serverNet);
7. Implement URLLC Applications
Create applications that simulate URLLC functionalities. Below is an example of a simple application that simulates devices sending critical data to a central server with strict timing requirements.
URLLC Device Application
class URLLCDeviceApplication : 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(0.1), &URLLCDeviceApplication::SendData, this);
}
void SetServerAddress(Ipv4Address address, uint16_t port) {
serverAddress = address;
serverPort = port;
}
void SendData() {
std::ostringstream msg;
msg << “Critical data from URLLC 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(MilliSeconds(10), &URLLCDeviceApplication::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 << “Server received data from ” << InetSocketAddress::ConvertFrom(from).GetIpv4() << std::endl;
}
}
private:
Ptr<Socket> recvSocket;
uint16_t localPort;
};
8. Install Applications
Install the applications on the nodes.
ApplicationContainer urllcApps, serverApps;
// Install URLLC device applications
for (uint32_t i = 0; i < urllcDevices.GetN(); ++i) {
Ptr<URLLCDeviceApplication> app = CreateObject<URLLCDeviceApplication>();
app->SetServerAddress(serverNode.Get(0)->GetObject<Ipv4>()->GetAddress(1, 0).GetLocal(), 9);
urllcDevices.Get(i)->AddApplication(app);
app->SetStartTime(Seconds(0.1 * i));
app->SetStopTime(Seconds(20.0));
urllcApps.Add(app);
}
// Install server application
Ptr<ServerApplication> serverApp = CreateObject<ServerApplication>();
serverApp->SetLocalPort(9);
serverNode.Get(0)->AddApplication(serverApp);
serverApp->SetStartTime(Seconds(0.0));
serverApp->SetStopTime(Seconds(20.0));
serverApps.Add(serverApp);
9. Run the Simulation
Configure the simulation runtime and execute it.
Simulator::Stop(Seconds(20.0));
Simulator::Run();
Simulator::Destroy();
Example of a Simple URLLC Network Script
Here’s an example script for URLLC implementation:
#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 URLLCDeviceApplication : 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(0.1), &URLLCDeviceApplication::SendData, this);
}
void SetServerAddress(Ipv4Address address, uint16_t port) {
serverAddress = address;
serverPort = port;
}
void SendData() {
std::ostringstream msg;
msg << “Critical data from URLLC 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(MilliSeconds(10), &URLLCDeviceApplication::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<<“Serverreceiveddatafrom”<< InetSocketAddress::ConvertFrom(from).GetIpv4() << std::endl;
}
}
private:
Ptr<Socket> recvSocket;
uint16_t localPort;
};
int main(int argc, char *argv[]) {
NodeContainer urllcDevices, serverNode;
urllcDevices.Create(20);
serverNode.Create(1);
// WiFi setup
WifiHelper wifi;
wifi.SetStandard(WIFI_PHY_STANDARD_80211n_5GHZ);
WifiMacHelper mac;
mac.SetType(“ns::AdhocWifiMac”);
YansWifiPhyHelper phy = YansWifiPhyHelper::Default();
YansWifiChannelHelper channel = YansWifiChannelHelper::Default();
phy.SetChannel(channel.Create());
NetDeviceContainer urllcDevicesNet = wifi.Install(phy, mac, urllcDevices);
NetDeviceContainer serverNet = wifi.Install(phy, mac, serverNode);
// Mobility setup
MobilityHelper mobility;
mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);
mobility.Install(urllcDevices);
mobility.Install(serverNode);
// Internet stack and routing
InternetStackHelper internet;
internet.Install(urllcDevices);
internet.Install(serverNode);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer urllcDevicesInterfaces = address.Assign(urllcDevicesNet);
Ipv4InterfaceContainer serverInterface = address.Assign(serverNet);
// Install applications
ApplicationContainer urllcApps, serverApps;
// Install URLLC device applications
for (uint32_t i = 0; i < urllcDevices.GetN(); ++i) {
Ptr<URLLCDeviceApplication> app = CreateObject<URLLCDeviceApplication>();
app->SetServerAddress(serverNode.Get(0)->GetObject<Ipv4>()->GetAddress(1, 0).GetLocal(), 9);
urllcDevices.Get(i)->AddApplication(app);
app->SetStartTime(Seconds(0.1 * i));
app->SetStopTime(Seconds(20.0));
urllcApps.Add(app);
}
// Install server application
Ptr<ServerApplication> serverApp = CreateObject<ServerApplication>();
serverApp->SetLocalPort(9);
serverNode.Get(0)->AddApplication(serverApp);
serverApp->SetStartTime(Seconds(0.0));
serverApp->SetStopTime(Seconds(20.0));
serverApps.Add(serverApp);
Simulator::Stop(Seconds(20.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
Finally, we had learnt to implement the Ultra Reliable Low latency Communication in ns3 by using highly reliable communication with low latency for the important applications. For good project help on Ultra Reliable Low latency Communication in ns3 you can contact us.