* Authors: Mirko Banchi <mk.banchi@gmail.com>

 *          Sebastien Deronne <sebastien.deronne@gmail.com>

//This is a simple example of an IEEE 802.11n Wi-Fi network.

//

//

//         AP

//    *    *

//    |    |

//    n1   n2

NS_LOG_COMPONENT_DEFINE ("ht-wifi-network");

  double simulationTime = 10; //seconds

  CommandLine cmd;

  cmd.AddValue ("simulationTime", "Simulation time in seconds", simulationTime);

  cmd.AddValue ("udp", "UDP if set to 1, TCP otherwise", udp);

  cmd.Parse (argc,argv);

  std::cout << "DataRate" << "\t" << "Throughput" << '\n';

  for (int mcs = 0; mcs <= 31; mcs++)

    {

      uint32_t payloadSize; //1500 byte IP packet

      if (udp)

        {

          payloadSize = 1472; //bytes

        }

      else

        {

          payloadSize = 1448; //bytes

          Config::SetDefault ("ns3::TcpSocket::SegmentSize", UintegerValue (payloadSize));

        }

      NodeContainer wifiStaNode;

      wifiStaNode.Create (1);

      NodeContainer wifiApNode;

      wifiApNode.Create (1);

      YansWifiChannelHelper channel = YansWifiChannelHelper::Default ();

      YansWifiPhyHelper phy = YansWifiPhyHelper::Default ();

      phy.SetChannel (channel.Create ());

      if (mcs <= 7)

        {

          phy.Set ("ShortGuardEnabled", BooleanValue (false));

          phy.Set ("ChannelBonding", BooleanValue (false));

        }

      else if (mcs > 7 && mcs <= 15)

        {

          phy.Set ("ShortGuardEnabled", BooleanValue (true));

          phy.Set ("ChannelBonding", BooleanValue (false));

        }

      else if (mcs > 15 && mcs <= 23)

        {

          phy.Set ("ShortGuardEnabled", BooleanValue (false));

          phy.Set ("ChannelBonding", BooleanValue (true));

        }

      else

        {

          phy.Set ("ShortGuardEnabled", BooleanValue (true));

          phy.Set ("ChannelBonding", BooleanValue (true));

        }

      WifiHelper wifi = WifiHelper::Default ();

      wifi.SetStandard (WIFI_PHY_STANDARD_80211n_5GHZ);

      HtWifiMacHelper mac = HtWifiMacHelper::Default ();

      Ssid ssid = Ssid ("ns380211n");

      double datarate = 0;

      StringValue DataRate;

      if (mcs == 0)

        {

          DataRate = StringValue ("OfdmRate6_5MbpsBW20MHz");

          datarate = 6.5;

        }

      else if (mcs == 1)

        {

          DataRate = StringValue ("OfdmRate13MbpsBW20MHz");

          datarate = 13;

        }

      else if (mcs == 2)

        {

          DataRate = StringValue ("OfdmRate19_5MbpsBW20MHz");

          datarate = 19.5;

        }

      else if (mcs == 3)

        {

          DataRate = StringValue ("OfdmRate26MbpsBW20MHz");

          datarate = 26;

        }

      else if (mcs == 4)

        {

          DataRate = StringValue ("OfdmRate39MbpsBW20MHz");

          datarate = 39;

        }

      else if (mcs == 5)

        {

          DataRate = StringValue ("OfdmRate52MbpsBW20MHz");

          datarate = 52;

        }

      else if (mcs == 6)

        {

          DataRate = StringValue ("OfdmRate58_5MbpsBW20MHz");

          datarate = 58.5;

        }

      else if (mcs == 7)

        {

          DataRate = StringValue ("OfdmRate65MbpsBW20MHz");

          datarate = 65;

        }

      else if (mcs == 8)

        {

          DataRate = StringValue ("OfdmRate7_2MbpsBW20MHz");

          datarate = 7.2;

        }

      else if (mcs == 9)

        {

          DataRate = StringValue ("OfdmRate14_4MbpsBW20MHz");

          datarate = 14.4;

        }

      else if (mcs == 10)

        {

          DataRate = StringValue ("OfdmRate21_7MbpsBW20MHz");

          datarate = 21.7;

        }

      else if (mcs == 11)

        {

          DataRate = StringValue ("OfdmRate28_9MbpsBW20MHz");

          datarate = 28.9;

        }

      else if (mcs == 12)

        {

          DataRate = StringValue ("OfdmRate43_3MbpsBW20MHz");

          datarate = 43.3;

        }

      else if (mcs == 13)

        {

          DataRate = StringValue ("OfdmRate57_8MbpsBW20MHz");

          datarate = 57.8;

        }

      else if (mcs == 14)

        {

          DataRate = StringValue ("OfdmRate65MbpsBW20MHzShGi");

          datarate = 65;

        }

      else if (mcs == 15)

        {

          DataRate = StringValue ("OfdmRate72_2MbpsBW20MHz");

          datarate = 72.2;

        }

      else if (mcs == 16)

        {

          DataRate = StringValue ("OfdmRate13_5MbpsBW40MHz");

          datarate = 13.5;

        }

      else if (mcs == 17)

        {

          DataRate = StringValue ("OfdmRate27MbpsBW40MHz");

          datarate = 27;

        }

      else if (mcs == 18)

        {

          DataRate = StringValue ("OfdmRate40_5MbpsBW40MHz");

          datarate = 40.5;

        }

      else if (mcs == 19)

        {

          DataRate = StringValue ("OfdmRate54MbpsBW40MHz");

          datarate = 54;

        }

      else if (mcs == 20)

        {

          DataRate = StringValue ("OfdmRate81MbpsBW40MHz");

          datarate = 81;

        }

      else if (mcs == 21)

        {

          DataRate = StringValue ("OfdmRate108MbpsBW40MHz");

          datarate = 108;

        }

      else if (mcs == 22)

        {

          DataRate = StringValue ("OfdmRate121_5MbpsBW40MHz");

          datarate = 121.5;

        }

      else if (mcs == 23)

        {

          DataRate = StringValue ("OfdmRate135MbpsBW40MHz");

          datarate = 135;

        }

      else if (mcs == 24)

        {

          DataRate = StringValue ("OfdmRate15MbpsBW40MHz");

          datarate = 15;

        }

      else if (mcs == 25)

        {

          DataRate = StringValue ("OfdmRate30MbpsBW40MHz");

          datarate = 30;

        }

      else if (mcs == 26)

        {

          DataRate = StringValue ("OfdmRate45MbpsBW40MHz");

          datarate = 45;

        }

      else if (mcs == 27)

        {

          DataRate = StringValue ("OfdmRate60MbpsBW40MHz");

          datarate = 60;

        }

      else if (mcs == 28)

        {

          DataRate = StringValue ("OfdmRate90MbpsBW40MHz");

          datarate = 90;

        }

      else if (mcs == 29)

        {

          DataRate = StringValue ("OfdmRate120MbpsBW40MHz");

          datarate = 120;

        }

      else if (mcs == 30)

        {

          DataRate = StringValue ("OfdmRate135MbpsBW40MHzShGi");

          datarate = 135;

        }

      else

        {

          DataRate = StringValue ("OfdmRate150MbpsBW40MHz");

          datarate = 150;

        }

      wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager","DataMode", DataRate,

                                    "ControlMode", DataRate);

      mac.SetType ("ns3::StaWifiMac",

                   "Ssid", SsidValue (ssid),

                   "ActiveProbing", BooleanValue (false));

      NetDeviceContainer staDevice;

      staDevice = wifi.Install (phy, mac, wifiStaNode);

      mac.SetType ("ns3::ApWifiMac",

                   "Ssid", SsidValue (ssid));

      NetDeviceContainer apDevice;

      apDevice = wifi.Install (phy, mac, wifiApNode);

      // mobility.

      MobilityHelper mobility;

      Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();

      positionAlloc->Add (Vector (0.0, 0.0, 0.0));

      positionAlloc->Add (Vector (1.0, 0.0, 0.0));

      mobility.SetPositionAllocator (positionAlloc);

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

      mobility.Install (wifiApNode);

      mobility.Install (wifiStaNode);

      /* Internet stack*/

      InternetStackHelper stack;

      stack.Install (wifiApNode);

      stack.Install (wifiStaNode);

      Ipv4AddressHelper address;

      address.SetBase ("192.168.1.0", "255.255.255.0");

      Ipv4InterfaceContainer staNodeInterface;

      Ipv4InterfaceContainer apNodeInterface;

      staNodeInterface = address.Assign (staDevice);

      apNodeInterface = address.Assign (apDevice);

      /* Setting applications */

      ApplicationContainer serverApp, sinkApp;

      if (udp)

        {

          //UDP flow

          UdpServerHelper myServer (9);

          serverApp = myServer.Install (wifiStaNode.Get (0));

          serverApp.Start (Seconds (0.0));

          serverApp.Stop (Seconds (simulationTime+1));

          UdpClientHelper myClient (staNodeInterface.GetAddress (0), 9);

          myClient.SetAttribute ("MaxPackets", UintegerValue (4294967295));

          myClient.SetAttribute ("Interval", TimeValue (Time ("0.00002"))); //packets/s

          myClient.SetAttribute ("PacketSize", UintegerValue (payloadSize));

          ApplicationContainer clientApp = myClient.Install (wifiApNode.Get (0));

          clientApp.Start (Seconds (1.0));

          clientApp.Stop (Seconds (simulationTime+1));

        }

      else

        {

          //TCP flow

          uint16_t port = 50000;

          Address apLocalAddress (InetSocketAddress (Ipv4Address::GetAny (), port));

          PacketSinkHelper packetSinkHelper ("ns3::TcpSocketFactory", apLocalAddress);

          sinkApp = packetSinkHelper.Install (wifiStaNode.Get (0));

          sinkApp.Start (Seconds (0.0));

          sinkApp.Stop (Seconds (simulationTime+1));

          OnOffHelper onoff ("ns3::TcpSocketFactory",Ipv4Address::GetAny ());

          onoff.SetAttribute ("OnTime",  StringValue ("ns3::ConstantRandomVariable[Constant=1]"));

          onoff.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]"));

          onoff.SetAttribute ("PacketSize", UintegerValue (payloadSize));

          onoff.SetAttribute ("DataRate", DataRateValue (1000000000)); //bit/s

          ApplicationContainer apps;

          AddressValue remoteAddress (InetSocketAddress (staNodeInterface.GetAddress (0), port));

          onoff.SetAttribute ("Remote", remoteAddress);

          apps.Add (onoff.Install (wifiApNode.Get (0)));

          apps.Start (Seconds (1.0));

          apps.Stop (Seconds (simulationTime+1));

        }

      Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

      Simulator::Stop (Seconds (simulationTime+1));

      Simulator::Run ();

      Simulator::Destroy ();

      double throughput = 0;

      if (udp)

        {

          //UDP

          uint32_t totalPacketsThrough = DynamicCast<UdpServer> (serverApp.Get (0))->GetReceived ();

          throughput = totalPacketsThrough * payloadSize * 8 / (simulationTime * 1000000.0); //Mbit/s

        }

      else

        {

          //TCP

          uint32_t totalPacketsThrough = DynamicCast<PacketSink> (sinkApp.Get (0))->GetTotalRx ();

          throughput = totalPacketsThrough * 8 / (simulationTime * 1000000.0); //Mbit/s

        }

      std::cout << datarate << "\t\t" << throughput << " Mbit/s" << std::endl;

    }

}