To implement network content dissemination in ns3, we need to create a simulation environment. In which that where is distributed from a source node to multiple destination nodes. By using various networking protocols and models available in ns3 we can apply this process.
The following steps will guide on setting up basic simulation environment in ns3.
Step-by-step guide to implement network content dissemination:
Step 1: Setup ns3 Environment
Ensure that ns3 is installed and properly configured.
git clone https://gitlab.com/nsnam/ns-3-dev.git
cd ns-3-dev
./waf configure
./waf build
Step 2: Understand ns3 Structure
ns3 is modular, and we can use existing modules to implement content dissemination. You may use TCP/UDP for transport, and application-level protocols such as HTTP, FTP, or custom protocols for content dissemination.
Step 3: Create a Custom Application for Content Dissemination
To implement content dissemination, you need to create a custom application or modify an existing one to handle content distribution logic.
- Create a Custom Application:
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/applications-module.h”
using namespace ns3;
class ContentDisseminationApp : public Application
{
public:
ContentDisseminationApp();
virtual ~ContentDisseminationApp();
void Setup(Ptr<Socket> socket, Address address, uint32_t packetSize, uint32_t nPackets, DataRate dataRate);
private:
virtual void StartApplication(void);
virtual void StopApplication(void);
void ScheduleTx(void);
void SendPacket(void);
Ptr<Socket> m_socket;
Address m_peer;
uint32_t m_packetSize;
uint32_t m_nPackets;
DataRate m_dataRate;
EventId m_sendEvent;
bool m_running;
uint32_t m_packetsSent;
};
ContentDisseminationApp::ContentDisseminationApp()
: m_socket(0), m_peer(), m_packetSize(0), m_nPackets(0), m_dataRate(0), m_sendEvent(), m_running(false), m_packetsSent(0) {}
ContentDisseminationApp::~ContentDisseminationApp() {
m_socket = 0;
}
void ContentDisseminationApp::Setup(Ptr<Socket> socket, Address address, uint32_t packetSize, uint32_t nPackets, DataRate dataRate) {
m_socket = socket;
m_peer = address;
m_packetSize = packetSize;
m_nPackets = nPackets;
m_dataRate = dataRate;
}
void ContentDisseminationApp::StartApplication(void) {
m_running = true;
m_packetsSent = 0;
m_socket->Connect(m_peer);
SendPacket();
}
void ContentDisseminationApp::StopApplication(void) {
m_running = false;
if (m_sendEvent.IsRunning()) {
Simulator::Cancel(m_sendEvent);
}
if (m_socket) {
m_socket->Close();
}
}
void ContentDisseminationApp::SendPacket(void) {
Ptr<Packet> packet = Create<Packet>(m_packetSize);
m_socket->Send(packet);
if (++m_packetsSent < m_nPackets) {
ScheduleTx();
}
}
void ContentDisseminationApp::ScheduleTx(void) {
if (m_running) {
TimetNext(Seconds(m_packetSize* 8 / static_cast<double>(m_dataRate.GetBitRate())));
m_sendEvent = Simulator::Schedule(tNext, &ContentDisseminationApp::SendPacket, this);
}
}
Create a Helper Function:
class ContentDisseminationHelper
{
public:
ContentDisseminationHelper(Address address, uint32_t packetSize, uint32_t nPackets, DataRate dataRate);
void Install(Ptr<Node> node) const;
private:
Address m_address;
uint32_t m_packetSize;
uint32_t m_nPackets;
DataRate m_dataRate;
};
ContentDisseminationHelper::ContentDisseminationHelper(Address address, uint32_t packetSize, uint32_t nPackets, DataRate dataRate)
:m_address(address),m_packetSize(packetSize),m_nPackets(nPackets), m_dataRate(dataRate) {}
void ContentDisseminationHelper::Install(Ptr<Node> node) const {
Ptr<Socket> socket = Socket::CreateSocket(node, TcpSocketFactory::GetTypeId());
Ptr<ContentDisseminationApp> app = CreateObject<ContentDisseminationApp>();
app->Setup(socket, m_address, m_packetSize, m_nPackets, m_dataRate);
node->AddApplication(app);
app->SetStartTime(Seconds(1.0));
app->SetStopTime(Seconds(10.0));
}
Step 4: Modify Simulation Script
Integrate the custom application into the simulation script.
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “ns3/applications-module.h”
#include “content-dissemination-helper.h”
using namespace ns3;
int main(int argc, char *argv[])
{
CommandLine cmd;
cmd.Parse(argc, argv);
NodeContainer nodes;
nodes.Create(3); // One source node and two destination nodes
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install(nodes.Get(0), nodes.Get(1));
devices.Add(pointToPoint.Install(nodes.Get(0), nodes.Get(2)));
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign(devices);
uint16_t port = 8080;
Address sinkAddress(InetSocketAddress(interfaces.GetAddress(1), port));
Address sinkAddress2(InetSocketAddress(interfaces.GetAddress(2), port));
PacketSinkHelperpacketSinkHelper(“ns3::TcpSocketFactory”, InetSocketAddress(Ipv4Address::GetAny(), port));
ApplicationContainer sinkApps = packetSinkHelper.Install(nodes.Get(1));
sinkApps.Add(packetSinkHelper.Install(nodes.Get(2)));
sinkApps.Start(Seconds(0.0));
sinkApps.Stop(Seconds(10.0));
ContentDisseminationHelpercontentHelper(sinkAddress, 1024, 1000, DataRate(“1Mbps”));
contentHelper.Install(nodes.Get(0));
Simulator::Stop(Seconds(10.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
Step 5: Run the Simulation
- Compile the Simulation:
./waf configure –enable-examples
./waf build
Run the Simulation:
./waf –run <your-simulation-script>
Step 6: Analyze Results
After running the simulation, analyze the results to evaluate the performance of the content dissemination scheme. We may need to collect metrics such as throughput, latency, packet delivery ratio, and fairness.
Finally, we had completely understand the implementation process of network content dissemination in ns3, by using various protocols and models available in it.
Implementation of Network content dissemination in ns3tool will be done by our experts you can get best project ideas along with execution details from ns3simulaton.com.