NS-3 simulation for communication between wifi nodes on different wireless LAN

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/* NS-3 simulation for communication between wifi nodes on different wireless LAN
 * Extension of the "third" example
 */

#include "ns3/core-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/network-module.h"
#include "ns3/applications-module.h"
#include "ns3/wifi-module.h"
#include "ns3/mobility-module.h"
#include "ns3/csma-module.h"
#include "ns3/internet-module.h"

// Default Network Topology
//
//   Wifi 10.1.3.0
//                    AP
//    *    *    *    *
//    |     |     |     |    10.1.1.0                                     10.1.4.0
//   n7  n8  n9  n0 --------------  n1  n4  n5  n6  n3 -------------- n2  n10  n11  n12
//                               p2p           |     |     |    |     |         p2p         |       |       |      |
//                                         ===========                            *      *       *     *
//                                             LAN 10.1.2.0                         AP
//                                                                                                  Wifi 10.1.5.0
using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("Wifi2Wifi");

int
main (int argc, char *argv[])
{
  bool verbose = true;
  uint32_t nCsma = 3;
  uint32_t nWifi1 = 3;
  uint32_t nWifi2 = 3;

  CommandLine cmd;
  cmd.AddValue ("nCsma", "Number of \"extra\" CSMA nodes/devices", nCsma);
  cmd.AddValue ("nWifi1", "Number of wifi 1 STA devices", nWifi1);
  cmd.AddValue ("nWifi2", "Number of wifi 2 STA devices", nWifi2);
  cmd.AddValue ("verbose", "Tell echo applications to log if true", verbose);

  cmd.Parse (argc,argv);

  if (nWifi1 > 18)
    {
      std::cout << "Number of wifi 1 nodes " << nWifi1 <<
                   " specified exceeds the mobility bounding box" << std::endl;
      exit (1);
    }
  if (nWifi2 > 18)
    {
      std::cout << "Number of wifi 2 nodes " << nWifi2 <<
                   " specified exceeds the mobility bounding box" << std::endl;
      exit (1);
    }

  if (verbose)
    {
      LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_INFO);
      LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_INFO);
    }

  /* First p2p*/
  NodeContainer p2pNodes;
  p2pNodes.Create (2);

  PointToPointHelper pointToPoint;
  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
  pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));

  NetDeviceContainer p2pDevices;
  p2pDevices = pointToPoint.Install (p2pNodes);

  /* Second p2p*/
  NodeContainer p2pNodes2;
  p2pNodes2.Create (2);

  PointToPointHelper pointToPoint2;
  pointToPoint2.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
  pointToPoint2.SetChannelAttribute ("Delay", StringValue ("2ms"));

  NetDeviceContainer p2pDevices2;
  p2pDevices2 = pointToPoint2.Install (p2pNodes2);

  NodeContainer csmaNodes;
  csmaNodes.Add (p2pNodes.Get (1));
  csmaNodes.Add (p2pNodes2.Get (1));
  csmaNodes.Create (nCsma);


  CsmaHelper csma;
  csma.SetChannelAttribute ("DataRate", StringValue ("100Mbps"));
  csma.SetChannelAttribute ("Delay", TimeValue (NanoSeconds (6560)));

  NetDeviceContainer csmaDevices;
  csmaDevices = csma.Install (csmaNodes);

  /*First Wifi*/
  NodeContainer wifiStaNodes;
  wifiStaNodes.Create (nWifi1);
  NodeContainer wifiApNode = p2pNodes.Get (0);

  YansWifiChannelHelper channel = YansWifiChannelHelper::Default ();
  YansWifiPhyHelper phy = YansWifiPhyHelper::Default ();
  phy.SetChannel (channel.Create ());

  WifiHelper wifi = WifiHelper::Default ();
  wifi.SetRemoteStationManager ("ns3::AarfWifiManager");

  NqosWifiMacHelper mac = NqosWifiMacHelper::Default ();

  Ssid ssid = Ssid ("SUPERMAN");
  mac.SetType ("ns3::StaWifiMac",
               "Ssid", SsidValue (ssid),
               "ActiveProbing", BooleanValue (false));

  NetDeviceContainer staDevices;
  staDevices = wifi.Install (phy, mac, wifiStaNodes);

  mac.SetType ("ns3::ApWifiMac",
               "Ssid", SsidValue (ssid));

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

  MobilityHelper mobility;

  mobility.SetPositionAllocator ("ns3::GridPositionAllocator",
                                 "MinX", DoubleValue (-30.0),
                                 "MinY", DoubleValue (-10.0),
                                 "DeltaX", DoubleValue (5.0),
                                 "DeltaY", DoubleValue (10.0),
                                 "GridWidth", UintegerValue (3),
                                 "LayoutType", StringValue ("RowFirst"));

  mobility.SetMobilityModel ("ns3::RandomWalk2dMobilityModel",
                             "Bounds", RectangleValue (Rectangle (-50, 50, -50, 50)));
  mobility.Install (wifiStaNodes);

  mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
  mobility.Install (wifiApNode);

  /* Second Wifi */

  NodeContainer wifiStaNodes2;
  wifiStaNodes2.Create (nWifi2);
  NodeContainer wifiApNode2 = p2pNodes2.Get (0);

  YansWifiChannelHelper channel2 = YansWifiChannelHelper::Default ();
  YansWifiPhyHelper phy2 = YansWifiPhyHelper::Default ();
  phy2.SetChannel (channel2.Create ());

  WifiHelper wifi2 = WifiHelper::Default ();
  wifi2.SetRemoteStationManager ("ns3::AarfWifiManager");

  NqosWifiMacHelper mac2 = NqosWifiMacHelper::Default ();

  Ssid ssid2 = Ssid ("BATMAN");
  mac2.SetType ("ns3::StaWifiMac",
               "Ssid", SsidValue (ssid2),
               "ActiveProbing", BooleanValue (false));

  NetDeviceContainer staDevices2;
  staDevices2 = wifi.Install (phy2, mac2, wifiStaNodes2);

  mac2.SetType ("ns3::ApWifiMac",
               "Ssid", SsidValue (ssid2));

  NetDeviceContainer apDevices2;
  apDevices2 = wifi2.Install (phy2, mac2, wifiApNode2);

  MobilityHelper mobility2;

  mobility2.SetPositionAllocator ("ns3::GridPositionAllocator",
                                 "MinX", DoubleValue (20.0),
                                 "MinY", DoubleValue (-20.0),
                                 "DeltaX", DoubleValue (5.0),
                                 "DeltaY", DoubleValue (10.0),
                                 "GridWidth", UintegerValue (3),
                                 "LayoutType", StringValue ("RowFirst"));

  mobility2.SetMobilityModel ("ns3::RandomWalk2dMobilityModel",
                             "Bounds", RectangleValue (Rectangle (-50, 50, -50, 50)));
  mobility2.Install (wifiStaNodes2);

  mobility2.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
  mobility2.Install (wifiApNode2);


  InternetStackHelper stack;
  stack.Install (csmaNodes);
  stack.Install (wifiApNode);
  stack.Install (wifiApNode2);
  stack.Install (wifiStaNodes);
  stack.Install (wifiStaNodes2);

  Ipv4AddressHelper address;

  address.SetBase ("10.1.1.0", "255.255.255.0");
  Ipv4InterfaceContainer p2pInterfaces;
  p2pInterfaces = address.Assign (p2pDevices);

  address.SetBase ("10.1.2.0", "255.255.255.0");
  Ipv4InterfaceContainer csmaInterfaces;
  csmaInterfaces = address.Assign (csmaDevices);

  address.SetBase ("10.1.3.0", "255.255.255.0");
  Ipv4InterfaceContainer wifiInterfaces;
  wifiInterfaces = address.Assign (staDevices);
  //wifiInterfaces = address.Assign (apDevices);

  address.SetBase ("10.1.4.0", "255.255.255.0");
  Ipv4InterfaceContainer p2pInterfaces2;
  p2pInterfaces2 = address.Assign (p2pDevices2);

  address.SetBase ("10.1.5.0", "255.255.255.0");
  Ipv4InterfaceContainer wifiInterfaces2;
  wifiInterfaces2 = address.Assign (staDevices2);
  wifiInterfaces2 = address.Assign (apDevices2);


  
  /* Make a node from the second Wifi network as the server */
  UdpEchoServerHelper echoServer (9);
  ApplicationContainer serverApps = echoServer.Install (wifiStaNodes2.Get (1));
  serverApps.Start (Seconds (1.0));
  serverApps.Stop (Seconds (10.0));


  /* Make a node from the first Wifi network as the client */
  UdpEchoClientHelper echoClient (wifiInterfaces2.GetAddress (1), 9);  //connect to server
  echoClient.SetAttribute ("MaxPackets", UintegerValue (6));
  echoClient.SetAttribute ("Interval", TimeValue (Seconds (1.0)));
  echoClient.SetAttribute ("PacketSize", UintegerValue (1024));
  ApplicationContainer clientApps = echoClient.Install (wifiStaNodes.Get (1));
  clientApps.Start (Seconds (2.0));
  clientApps.Stop (Seconds (10.0));

  Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

  Simulator::Stop (Seconds (10.0));

  Simulator::Run ();
  Simulator::Destroy ();
  return 0;
}

REFERENCES:

https://www.nsnam.org/documentation/