To implement in-body, on-body, and off-body network simulations in ns3, by setting up scenarios where nodes represent body-worn devices or sensors inside or outside the body. Adjusting the mobility models, propagation loss models, and setting up the appropriate network stack are included in this process. Below given steps will guide on how to implement this network in ns3.
Step-by-step guide to implement the in-body, on-body, and off-body network in ns3:
Step 1: Define the Scenario
- In-Body: Nodes represent sensors inside the body.
- On-Body: Nodes represent devices worn on the body.
- Off-Body: Nodes represent devices outside the body communicating with on-body or in-body devices.
Step 2: Setup ns3 Environment
Make sure ns3 is installed and set up on the system.
Step 3: Create Custom Mobility Models
Create custom mobility models for in-body, on-body, and off-body nodes if needed. ns3 provides several built-in mobility models that can be used directly or extended.
Step 4: Create Custom Propagation Loss Models
The propagation characteristics of in-body and on-body communication are different from standard wireless communication. We may need to create custom propagation loss models to simulate these environments accurately.
Step 5: Implement the Simulation Script
Here’s an example script that sets up nodes for in-body, on-body, and off-body communication using Wi-Fi:
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/mobility-module.h”
#include “ns3/wifi-module.h”
#include “ns3/internet-module.h”
#include “ns3/applications-module.h”
#include “ns3/propagation-loss-model.h”
using namespace ns3;
int main (int argc, char *argv[])
{
NodeContainer inBodyNodes;
NodeContainer onBodyNodes;
NodeContainer offBodyNodes;
inBodyNodes.Create (2); // 2 in-body nodes
onBodyNodes.Create (2); // 2 on-body nodes
offBodyNodes.Create (2); // 2 off-body nodes
// Set up mobility models
MobilityHelper mobility;
Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();
positionAlloc->Add (Vector (1.0, 2.0, 0.0)); // In-body node 1
positionAlloc->Add (Vector (1.5, 2.0, 0.0)); // In-body node 2
positionAlloc->Add (Vector (2.0, 2.0, 0.0)); // On-body node 1
positionAlloc->Add (Vector (2.5, 2.0, 0.0)); // On-body node 2
positionAlloc->Add (Vector (5.0, 5.0, 0.0)); // Off-body node 1
positionAlloc->Add (Vector (5.5, 5.0, 0.0)); // Off-body node 2
mobility.SetPositionAllocator (positionAlloc);
mobility.SetMobilityModel (“ns3::ConstantPositionMobilityModel”);
mobility.Install (inBodyNodes);
mobility.Install (onBodyNodes);
mobility.Install (offBodyNodes);
// Set up Wi-Fi
WifiHelper wifi;
wifi.SetStandard (WIFI_PHY_STANDARD_80211n_2_4GHZ);
YansWifiPhyHelper phy = YansWifiPhyHelper::Default ();
YansWifiChannelHelper channel = YansWifiChannelHelper::Default ();
// Custom propagation loss model
Ptr<MatrixPropagationLossModel>lossModel = CreateObject<MatrixPropagationLossModel> ();
lossModel->SetDefaultLoss (80); // Set high loss for in-body communication
phy.SetChannel (channel.Create ());
channel.AddPropagationLoss (“ns3::MatrixPropagationLossModel”, “LossMatrix”, PointerValue (lossModel));
WifiMacHelper mac;
Ssid ssid = Ssid (“ns-3-ssid”);
mac.SetType (“ns3::StaWifiMac”,
“Ssid”, SsidValue (ssid),
“ActiveProbing”, BooleanValue (false));
NetDeviceContainer inBodyDevices = wifi.Install (phy, mac, inBodyNodes);
NetDeviceContainer onBodyDevices = wifi.Install (phy, mac, onBodyNodes);
NetDeviceContainer offBodyDevices = wifi.Install (phy, mac, offBodyNodes);
mac.SetType (“ns3::ApWifiMac”,
“Ssid”, SsidValue (ssid));
NetDeviceContainer apDevices = wifi.Install (phy, mac, onBodyNodes.Get (0)); // One on-body node as AP
// Set up Internet stack
InternetStackHelper stack;
stack.Install (inBodyNodes);
stack.Install (onBodyNodes);
stack.Install (offBodyNodes);
Ipv4AddressHelper address;
address.SetBase (“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer inBodyInterfaces = address.Assign (inBodyDevices);
Ipv4InterfaceContainer onBodyInterfaces = address.Assign (onBodyDevices);
Ipv4InterfaceContainer offBodyInterfaces = address.Assign (offBodyDevices);
address.Assign (apDevices);
// Set up applications
UdpEchoServerHelper echoServer (9);
ApplicationContainer serverApps = echoServer.Install (onBodyNodes.Get (0));
serverApps.Start (Seconds (1.0));
serverApps.Stop (Seconds (10.0));
UdpEchoClientHelper echoClient (onBodyInterfaces.GetAddress (0), 9);
echoClient.SetAttribute (“MaxPackets”, UintegerValue (10));
echoClient.SetAttribute (“Interval”, TimeValue (Seconds (1.0)));
echoClient.SetAttribute (“PacketSize”, UintegerValue (1024));
ApplicationContainer clientApps = echoClient.Install (inBodyNodes.Get (0));
clientApps.Start (Seconds (2.0));
clientApps.Stop (Seconds (10.0));
clientApps.Add (echoClient.Install (offBodyNodes.Get (0)));
clientApps.Start (Seconds (3.0));
clientApps.Stop (Seconds (10.0));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
Step 6: Compile and Run Your Simulation
Compile the ns3 simulation script and run the simulation.
Example Compilation Command:
./waf configure
./waf build
./waf –run your-simulation-script
Explanation:
- Nodes Creation: We create separate node containers for in-body, on-body, and off-body nodes.
- Mobility Model: Assign positions to the nodes. We can customize this further to reflect realistic scenarios.
- Wi-Fi Setup: Configure Wi-Fi with custom propagation loss models to reflect different communication environments.
- Internet Stack: Install the Internet stack on all nodes.
- Applications: Set up UDP echo server and client applications to simulate data transmission.
At last, we have concluded that implementing the in-body, on-body, and off-body network can be done by creating custom mobility models, custom propagation loss models and then implementing the simulation script to analyse the result.
To achieve optimal performance analysis and implementation of Network In body, On body, Off body ns3 simulation, you can seek assistance from our experts. The developers at ns3simulation.com will provide you with project execution steps tailored to your needs for the best outcomes.