To implement the cooperative networking in ns-3 we make a simulation design where nodes work together to enhance the network performance like as improving throughput or decrease the delay. Cooperative networking often consists relay nodes that supports forwarding packets among source and destination nodes. Any type of Cooperative Networking in NS3 are handled well by us.
Here are the step by step procedures to implement the cooperative networking in ns-3:
Step-by-Step Guide to Implement Cooperative networking in ns-3
- Install ns-3
Ensure that ns-3 is installed on your system. You can download and install it from the official ns-3 website.
- Define the Network Topology
Define the network topology that includes:
- Source nodes
- Destination nodes
- Relay nodes
- Implement Network Nodes
Create network nodes using NodeContainer.
NodeContainer sourceNodes, destinationNodes, relayNodes;
sourceNodes.Create(numSources);
destinationNodes.Create(numDestinations);
relayNodes.Create(numRelays);
- Set Up Network Devices
Install network devices on the nodes using appropriate network interfaces. For example, use WiFi for wireless communication.
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 sourceDevices = wifi.Install(phy, mac, sourceNodes);
NetDeviceContainer destinationDevices = wifi.Install(phy, mac, destinationNodes);
NetDeviceContainer relayDevices = wifi.Install(phy, mac, relayNodes);
- Configure Mobility Model
Set up the mobility model for the nodes to simulate realistic movement.
MobilityHelper mobility;
mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);
mobility.Install(sourceNodes);
mobility.Install(destinationNodes);
mobility.Install(relayNodes);
- Set Up Cooperative Protocol
To implement cooperative networking, you need to define the cooperative communication protocol. This often involves defining the roles of relay nodes in forwarding packets.
- Basic Cooperative Relaying
Here’s a simplified version of how you might implement cooperative relaying using a custom application.
class RelayApplication : public Application {
public:
void StartApplication() override {
Ptr<Socket> recvSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
recvSocket->Bind(InetSocketAddress(Ipv4Address::GetAny(), recvPort));
recvSocket->SetRecvCallback(MakeCallback(&RelayApplication::HandleRead, this));
sendSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
}
void SendPacket(Ptr<Packet> packet) {
sendSocket->SendTo(packet, 0, InetSocketAddress(destAddress, destPort));
}
void HandleRead(Ptr<Socket> socket) {
Ptr<Packet> packet;
Address from;
while ((packet = socket->RecvFrom(from))) {
// Relay the packet to the destination
SendPacket(packet);
}
}
private:
Ptr<Socket> sendSocket;
Ipv4Address destAddress;
uint16_t destPort;
uint16_t recvPort;
};
- Setting Up Applications
Install the relay applications on the relay nodes and other applications on the source and destination nodes.
ApplicationContainer relayApps;
for (uint32_t i = 0; i < relayNodes.GetN(); ++i) {
Ptr<RelayApplication> app = CreateObject<RelayApplication>();
app->SetAttribute(“DestAddress”, Ipv4AddressValue(destinationAddress));
app->SetAttribute(“DestPort”, UintegerValue(9));
app->SetAttribute(“RecvPort”, UintegerValue(10));
relayNodes.Get(i)->AddApplication(app);
app->SetStartTime(Seconds(1.0));
app->SetStopTime(Seconds(10.0));
relayApps.Add(app);
}
OnOffHelper onoff(“ns3::UdpSocketFactory”, Address(InetSocketAddress(destinationAddress, 9)));
onoff.SetConstantRate(DataRate(“500kb/s”), 1024);
ApplicationContainer sourceApps = onoff.Install(sourceNodes);
sourceApps.Start(Seconds(2.0));
sourceApps.Stop(Seconds(10.0));
PacketSinkHelper sink(“ns3::UdpSocketFactory”, Address(InetSocketAddress(Ipv4Address::GetAny(), 9)));
ApplicationContainer destinationApps = sink.Install(destinationNodes);
destinationApps.Start(Seconds(2.0));
destinationApps.Stop(Seconds(10.0));
- Set Up Routing Protocols
Configure routing protocols for the network. You might want to use AODV, OLSR, or other routing protocols that support multi-hop communication.
AodvHelper aodv;
InternetStackHelper internet;
internet.SetRoutingHelper(aodv);
internet.Install(sourceNodes);
internet.Install(destinationNodes);
internet.Install(relayNodes);
- Assign IP Addresses
Assign IP addresses to the network devices.
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer sourceInterfaces = address.Assign(sourceDevices);
Ipv4InterfaceContainer destinationInterfaces = address.Assign(destinationDevices);
Ipv4InterfaceContainer relayInterfaces = address.Assign(relayDevices);
- Run the Simulation
Configure the simulation runtime and execute it.
Simulator::Stop(Seconds(20.0));
Simulator::Run();
Simulator::Destroy();
Example of a Simple Cooperative Network Script
In this place we provide the sample scripts for cooperative networks that is:
#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”
#include “ns3/aodv-module.h”
using namespace ns3;
class RelayApplication : public Application {
public:
void StartApplication() override {
Ptr<Socket> recvSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
recvSocket->Bind(InetSocketAddress(Ipv4Address::GetAny(), 10));
recvSocket->SetRecvCallback(MakeCallback(&RelayApplication::HandleRead, this));
sendSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
}
void SendPacket(Ptr<Packet> packet) {
sendSocket->SendTo(packet, 0, InetSocketAddress(destAddress, destPort));
}
void HandleRead(Ptr<Socket> socket) {
Ptr<Packet> packet;
Address from;
while ((packet = socket->RecvFrom(from))) {
// Relay the packet to the destination
SendPacket(packet);
}
}
void SetDestination(Ipv4Address address, uint16_t port) {
destAddress = address;
destPort = port;
}
private:
Ptr<Socket> sendSocket;
Ipv4Address destAddress;
uint16_t destPort;
};
int main(int argc, char *argv[]) {
NodeContainer sourceNodes, destinationNodes, relayNodes;
sourceNodes.Create(2);
destinationNodes.Create(2);
relayNodes.Create(2);
// WiFi setup
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 sourceDevices = wifi.Install(phy, mac, sourceNodes);
NetDeviceContainer destinationDevices = wifi.Install(phy, mac, destinationNodes);
NetDeviceContainer relayDevices = wifi.Install(phy, mac, relayNodes);
// Mobility setup
MobilityHelper mobility;
mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);
mobility.Install(sourceNodes);
mobility.Install(destinationNodes);
mobility.Install(relayNodes);
// Internet stack and routing
AodvHelper aodv;
InternetStackHelper internet;
internet.SetRoutingHelper(aodv);
internet.Install(sourceNodes);
internet.Install(destinationNodes);
internet.Install(relayNodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer sourceInterfaces = address.Assign(sourceDevices);
Ipv4InterfaceContainer destinationInterfaces = address.Assign(destinationDevices);
Ipv4InterfaceContainer relayInterfaces = address.Assign(relayDevices);
// Install applications
ApplicationContainer relayApps;
for (uint32_t i = 0; i < relayNodes.GetN(); ++i) {
Ptr<RelayApplication> app = CreateObject<RelayApplication>();
app->SetDestination(destinationInterfaces.GetAddress(0), 9);
relayNodes.Get(i)->AddApplication(app);
app->SetStartTime(Seconds(1.0));
app->SetStopTime(Seconds(10.0));
relayApps.Add(app);
}
OnOffHelper onoff(“ns3::UdpSocketFactory”, Address(InetSocketAddress(destinationInterfaces.GetAddress(0), 9)));
onoff.SetConstantRate(DataRate(“500kb/s”), 1024);
ApplicationContainer sourceApps = onoff.Install(sourceNodes);
sourceApps.Start(Seconds(2.0));
sourceApps.Stop(Seconds(10.0));
PacketSinkHelper sink(“ns3::UdpSocketFactory”, Address(InetSocketAddress(Ipv4Address::GetAny(), 9)));
ApplicationContainer destinationApps = sink.Install(destinationNodes);
destinationApps.Start(Seconds(2.0));
destinationApps.Stop(Seconds(10.0));
Simulator::Stop(Seconds(20.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
As we discussed earlier about how the Cooperative networking will accomplish in ns-3 environment and we help to provide further information about how the Cooperative networking will adapt in altered settings.