How to Implement Network Spatial Modulation in ns3

To implement the network spatial modulation in ns3 has encompasses to generate the simulation scenario where numerous antennas are utilized to encrypt the information spatially that optimizes the throughput and reliability of wireless communication systems. This process usually includes the various steps that contain to describe the modulation schema that configures the physical layer and executing the essential techniques for spatial modulation. The given below are the detailed procedures on how to implement the network spatial modulation in ns3:

Step-by-Step Implementation:

Step 1: Install ns3

Make sure ns3 is installed in the system.

Step 2: Define the Modulation Scheme

Generate the custom class for Network Spatial Modulation that will manage the encryption and decryption of information by multiple antennas.

1. Create a new file, e.g., nsm-helper.h:

#ifndef NSM_HELPER_H

#define NSM_HELPER_H

#include “ns3/node-container.h”

#include “ns3/net-device-container.h”

#include “ns3/wifi-helper.h”

#include “ns3/yans-wifi-helper.h”

#include “ns3/mobility-helper.h”

namespace ns3 {

class NsmHelper {

public:

NsmHelper ();

void SetAntennaCount (uint32_t count);

void Install (NodeContainer nodes);

void SetMobility (MobilityHelper mobility);

private:

uint32_t m_antennaCount;

NodeContainer m_nodes;

NetDeviceContainer m_devices;

MobilityHelper m_mobility;

};

} // namespace ns3

#endif // NSM_HELPER_H

Create the implementation file, e.g., nsm-helper.cc:

#include “nsm-helper.h”

#include “ns3/yans-wifi-helper.h”

#include “ns3/ssid.h”

namespace ns3 {

NsmHelper::NsmHelper ()

: m_antennaCount (2) // default to 2 antennas

{

}

void

NsmHelper::SetAntennaCount (uint32_t count) {

m_antennaCount = count;

}

void

NsmHelper::Install (NodeContainer nodes) {

m_nodes = nodes;

// Set up Wi-Fi

YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();

YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();

wifiPhy.SetChannel (wifiChannel.Create ());

WifiHelper wifi;

wifi.SetStandard (WIFI_PHY_STANDARD_80211n_5GHZ);

WifiMacHelper wifiMac;

wifiMac.SetType (“ns3::AdhocWifiMac”);

m_devices = wifi.Install (wifiPhy, wifiMac, m_nodes);

// Set mobility

m_mobility.Install (m_nodes);

}

void

NsmHelper::SetMobility (MobilityHelper mobility) {

m_mobility = mobility;

}

} // namespace ns3

Step 3: Integrate the Helper Class into Your Simulation

To manage the Network Spatial Modulation using the custom helper class in the simulation script.

1. Include the helper header in your simulation script:

#include “nsm-helper.h”

Create and configure the nodes and mobility:

NodeContainer nodes;

nodes.Create (4); // create 4 nodes for example

MobilityHelper mobility;

mobility.SetMobilityModel (“ns3::ConstantPositionMobilityModel”);

NsmHelper nsm;

nsm.SetAntennaCount (4); // Set the number of antennas

nsm.SetMobility (mobility);

nsm.Install (nodes);

Configure the communication settings:

// Install applications, configure data rates, and set up communication patterns

// this part can conclude the setting up UDP/TCP traffic, configuring IP addresses, etc.

Step 4: Implement the Network Spatial Modulation Algorithm

Using the NSM techniques, the information is encrypted using numerous antennas. The execution of encoding and decoding mechanism based on the particular NSM scheme. The given below is the basic sample:

1. Modify the PHY layer to support NSM:

// to support NSM encoding and decoding by adjust or prolong the existing PHY layer classes

// this step needs in-depth knowledge of the ns3 PHY layer execution.

Encode data spatially:

// to encode the data by using the data encoding function that utilizes multiple antennas

Decode received data:

// Implement the data decoding function that decodes the received signals from multiple antennas.

Step 5: Compile and Run Your Simulation

To execute the network spatial modulation simulation should be implement in the ns3 script with the new helper class and the modified PHY layer.

Example Compilation Command:

./waf configure

./waf build

./waf –run your-simulation-script

Example Simulation Script:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/mobility-module.h”

#include “ns3/wifi-module.h”

#include “nsm-helper.h”

using namespace ns3;

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

NodeContainer nodes;

nodes.Create (4);

MobilityHelper mobility;

mobility.SetMobilityModel (“ns3::ConstantPositionMobilityModel”);

NsmHelper nsm;

nsm.SetAntennaCount (4);

nsm.SetMobility (mobility);

nsm.Install (nodes);

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

Finally we all know about how to implement and execute the network spatial modulation in the ns3 framework that creates and configures the nodes and mobility using the NSM techniques and then to execute the simulation. We will plan to offer the additional information with implementation support on how the network spatial modulation perform in other simulation tools.