To implement the network neutrality in ns3, make certain depends on the source, destination or data’s type data should be treated equally without any judgement. Evading the prioritization, or throttling based on the condition, we have to accomplish this by altering the packet scheduling and forwarding mechanisms in ns3. Here we offer the step-by-step guide to implement network neutrality in the ns3:
Step-by-Step Implementation:
- Install ns3: Make certain that ns3 is installed on your system.
- Understand Packet Scheduling: In ns3, with the help of various queue disciplines, the packets are scheduled and forwarded. To make sure that the packets are treated equally in the queue by enforcing the network neutrality.
- Modify or Create a Queue Discipline: You may need to modify an existing queue discipline or create a new one that enforces network neutrality.
- Update Simulation Script: To ensure the network neutrality, we have to use the new or modified queue discipline by simulating the updated ns3.
Example Implementation:
- Modify or Create a Queue Discipline:
- In this instance, we are building a new queue discipline that treats all packets equally, irrespective of their source, destination, or type.
#include “ns3/queue-disc.h”
#include “ns3/packet.h”
namespace ns3 {
class NetworkNeutralityQueueDisc : public QueueDisc {
public:
static TypeId GetTypeId();
NetworkNeutralityQueueDisc();
virtual ~NetworkNeutralityQueueDisc();
protected:
virtual bool DoEnqueue(Ptr<QueueDiscItem> item);
virtual Ptr<QueueDiscItem> DoDequeue();
virtual Ptr<const QueueDiscItem> DoPeek();
};
TypeId
NetworkNeutralityQueueDisc::GetTypeId() {
static TypeId tid = TypeId(“ns3::NetworkNeutralityQueueDisc”)
.SetParent<QueueDisc>()
.SetGroupName(“TrafficControl”)
.AddConstructor<NetworkNeutralityQueueDisc>();
return tid;
}
NetworkNeutralityQueueDisc::NetworkNeutralityQueueDisc() {}
NetworkNeutralityQueueDisc::~NetworkNeutralityQueueDisc() {}
bool
NetworkNeutralityQueueDisc::DoEnqueue(Ptr<QueueDiscItem> item) {
return GetInternalQueue(0)->Enqueue(item);
}
Ptr<QueueDiscItem>
NetworkNeutralityQueueDisc::DoDequeue() {
Ptr<QueueDiscItem> item = GetInternalQueue(0)->Dequeue();
return item;
}
Ptr<const QueueDiscItem>
NetworkNeutralityQueueDisc::DoPeek() {
return GetInternalQueue(0)->Peek();
}
} // namespace ns3
This example code defines a simple queue discipline that treats all packets equally by using a single internal queue.
- Integrate the Queue Discipline into Your Simulation:
- Implement the network neutrality in the simulation script using the newly created queue discipline.
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “ns3/traffic-control-module.h”
#include “network-neutrality-queue-disc.h”
using namespace ns3;
int main(int argc, char *argv[]) {
CommandLine cmd;
cmd.Parse(argc, argv);
NodeContainer nodes;
nodes.Create(2);
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install(nodes);
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign(devices);
TrafficControlHelper tch;
tch.SetRootQueueDisc(“ns3::NetworkNeutralityQueueDisc”);
tch.Install(devices);
UdpEchoServerHelper echoServer(9);
ApplicationContainer serverApps = echoServer.Install(nodes.Get(1));
serverApps.Start(Seconds(1.0));
serverApps.Stop(Seconds(10.0));
UdpEchoClientHelper echoClient(interfaces.GetAddress(1), 9);
echoClient.SetAttribute(“MaxPackets”, UintegerValue(1));
echoClient.SetAttribute(“Interval”, TimeValue(Seconds(1.0)));
echoClient.SetAttribute(“PacketSize”, UintegerValue(1024));
ApplicationContainer clientApps = echoClient.Install(nodes.Get(0));
clientApps.Start(Seconds(2.0));
clientApps.Stop(Seconds(10.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
In this script:
- A point-to-point link between two nodes is created.
- The NetworkNeutralityQueueDisc is installed on the devices to ensure all packets are treated equally.
- A simple UDP echo server and client are set up to generate traffic.
Finally, we showcased the valuable details on how to implement network neutrality in the ns3 tool and the execution of the queue discipline. If you need, we will offer the process of other queue disciplines and their implementation in the network neutrality.
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