How to Implement network Capacity Improvement in ns3

To implement network improvement capacity in ns3, we need to follow several steps. In this process we have to increase the overall throughput and efficiency of the network by enhancing various network parameters and deploying additional network elements.

Below given steps will guide on how to set-up network capacity improvement in ns3.

Step-by-step guide to implement network capacity improvement in ns3:

1. Install ns3: Ensure ns3 is installed on the system.
2. Set Up Your Simulation Environment: Create a new simulation script or modify an existing one. Include necessary modules such as network, internet, and mobility.
3. Define Network Topology: Set up the network topology by defining nodes, channels, and devices.

NodeContainer nodes;

nodes.Create(10); // Example with 10 nodes

YansWifiChannelHelper channel = YansWifiChannelHelper::Default();

YansWifiPhyHelper phy = YansWifiPhyHelper::Default();

phy.SetChannel(channel.Create());

WifiHelper wifi = WifiHelper::Default();

WifiMacHelper mac;

Ssid ssid = Ssid(“ns-3-ssid”);

mac.SetType(“ns3::StaWifiMac”,

“Ssid”, SsidValue(ssid),

“ActiveProbing”, BooleanValue(false));

NetDeviceContainer devices = wifi.Install(phy, mac, nodes);

Configure Internet Stack: Install the internet stack on the nodes and assign IP addresses.

InternetStackHelper stack;

stack.Install(nodes);

Ipv4AddressHelper address;

address.SetBase(“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces = address.Assign(devices);

Implement Capacity Improvement Mechanisms: Implement various mechanisms to improve network capacity. This can include channel bonding, MIMO (Multiple Input Multiple Output), optimizing MAC parameters, or deploying additional access points.

class CapacityImprovementHelper

{

public:

static void EnableChannelBonding(NodeContainer nodes)

{

for (NodeContainer::Iterator it = nodes.Begin(); it != nodes.End(); ++it)

{

Ptr<Node> node = *it;

Ptr<NetDevice> device = node->GetDevice(0);

Ptr<WifiNetDevice> wifiDevice = DynamicCast<WifiNetDevice>(device);

Ptr<WifiPhy> wifiPhy = wifiDevice->GetPhy();

// Enable channel bonding (example setting)

wifiPhy->SetAttribute(“ChannelWidth”, UintegerValue(40));

}

}

static void ConfigureMIMO(NodeContainer nodes, uint32_t nTx, uint32_t nRx)

{

for (NodeContainer::Iterator it = nodes.Begin(); it != nodes.End(); ++it)

{

Ptr<Node> node = *it;

Ptr<NetDevice> device = node->GetDevice(0);

Ptr<WifiNetDevice> wifiDevice = DynamicCast<WifiNetDevice>(device);

Ptr<WifiPhy> wifiPhy = wifiDevice->GetPhy();

// Configure MIMO settings

wifiPhy->SetAttribute(“Antennas”, UintegerValue(nTx));

wifiPhy->SetAttribute(“MaxSupportedTxSpatialStreams”, UintegerValue(nTx));

wifiPhy->SetAttribute(“MaxSupportedRxSpatialStreams”, UintegerValue(nRx));

}

}

static void DeployAdditionalAPs(NodeContainer aps, NodeContainer nodes)

{

// Example: Deploy additional APs and connect nodes

for (NodeContainer::Iterator it = aps.Begin(); it != aps.End(); ++it)

{

Ptr<Node> ap = *it;

MobilityHelper mobility;

mobility.SetPositionAllocator(“ns3::GridPositionAllocator”,

“MinX”, DoubleValue(0.0),

“MinY”, DoubleValue(0.0),

“DeltaX”, DoubleValue(50.0),

“DeltaY”, DoubleValue(50.0),

“GridWidth”, UintegerValue(3),

“LayoutType”, StringValue(“RowFirst”));

mobility.Install(ap);

}

}

};

Setup Capacity Improvement in the Simulation: Integrate the capacity improvement helper into the simulation script.

int main(int argc, char *argv[])

{

CommandLine cmd;

cmd.Parse(argc, argv);

NodeContainer nodes;

nodes.Create(10); // 10 regular nodes

NodeContainer aps;

aps.Create(2); // 2 additional APs

YansWifiChannelHelper channel = YansWifiChannelHelper::Default();

YansWifiPhyHelper phy = YansWifiPhyHelper::Default();

phy.SetChannel(channel.Create());

WifiHelper wifi = WifiHelper::Default();

WifiMacHelper mac;

Ssid ssid = Ssid(“ns-3-ssid”);

mac.SetType(“ns3::StaWifiMac”,

“Ssid”, SsidValue(ssid),

“ActiveProbing”, BooleanValue(false));

NetDeviceContainer devices = wifi.Install(phy, mac, nodes);

NetDeviceContainer apDevices = wifi.Install(phy, mac, aps);

InternetStackHelper stack;

stack.Install(nodes);

stack.Install(aps);

Ipv4AddressHelper address;

address.SetBase(“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces = address.Assign(devices);

Ipv4InterfaceContainer apInterfaces = address.Assign(apDevices);

// Enable channel bonding

CapacityImprovementHelper::EnableChannelBonding(nodes);

CapacityImprovementHelper::EnableChannelBonding(aps);

// Configure MIMO settings

CapacityImprovementHelper::ConfigureMIMO(nodes, 2, 2); // 2×2 MIMO

CapacityImprovementHelper::ConfigureMIMO(aps, 2, 2);   // 2×2 MIMO

// Deploy additional APs

CapacityImprovementHelper::DeployAdditionalAPs(aps, nodes);

Simulator::Run();

Simulator::Destroy();

return 0;

}

Explanation

1. CapacityImprovementHelper Class:
   • EnableChannelBonding: This static method enables channel bonding for the nodes, which can increase the channel width and improve capacity.
   • ConfigureMIMO: This static method configures MIMO settings for the nodes, which allows multiple data streams to be transmitted simultaneously, improving capacity.
   • DeployAdditionalAPs: This static method deploys additional access points (APs) and connects them to the nodes, which can help distribute the traffic load and improve capacity.
2. Main Function:
   • Sets up the nodes, installs the PHY and MAC layers, configures the internet stack, assigns IP addresses, and runs the simulation.
   • Uses CapacityImprovementHelper to enable channel bonding, configure MIMO settings, and deploy additional access points.

Finally, we all get to know how to implement network capacity improvement in ns3 by using network parameters and additional elements which increase throughput and efficiency in the network.

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