/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation; * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Authors: Sébastien Deronne */ // This example is used to validate 802.11n MIMO. // // It outputs plots of the throughput versus the distance // for every HT MCS value and from 1 to 4 MIMO streams. // // The simulation assumes a single station in an infrastructure network: // // STA AP // * * // | | // n1 n2 // // The user can choose whether UDP or TCP should be used and can configure // some 802.11n parameters (frequency, channel width and guard interval). #include "ns3/core-module.h" #include "ns3/applications-module.h" #include "ns3/wifi-module.h" #include "ns3/mobility-module.h" #include "ns3/internet-module.h" #include "ns3/gnuplot.h" using namespace ns3; int main (int argc, char *argv[]) { std::ofstream file ("80211n-mimo-throughput.plt"); std::vector modes; modes.push_back ("HtMcs0"); modes.push_back ("HtMcs1"); modes.push_back ("HtMcs2"); modes.push_back ("HtMcs3"); modes.push_back ("HtMcs4"); modes.push_back ("HtMcs5"); modes.push_back ("HtMcs6"); modes.push_back ("HtMcs7"); modes.push_back ("HtMcs8"); modes.push_back ("HtMcs9"); modes.push_back ("HtMcs10"); modes.push_back ("HtMcs11"); modes.push_back ("HtMcs12"); modes.push_back ("HtMcs13"); modes.push_back ("HtMcs14"); modes.push_back ("HtMcs15"); modes.push_back ("HtMcs16"); modes.push_back ("HtMcs17"); modes.push_back ("HtMcs18"); modes.push_back ("HtMcs19"); modes.push_back ("HtMcs20"); modes.push_back ("HtMcs21"); modes.push_back ("HtMcs22"); modes.push_back ("HtMcs23"); modes.push_back ("HtMcs24"); modes.push_back ("HtMcs25"); modes.push_back ("HtMcs26"); modes.push_back ("HtMcs27"); modes.push_back ("HtMcs28"); modes.push_back ("HtMcs29"); modes.push_back ("HtMcs30"); modes.push_back ("HtMcs31"); bool udp = true; double simulationTime = 5; //seconds double frequency = 5.0; //whether 2.4 or 5.0 GHz double step = 5; //meters bool shortGuardInterval = false; bool channelBonding = false; CommandLine cmd; cmd.AddValue ("step", "Granularity of the results to be plotted in meters", step); cmd.AddValue ("simulationTime", "Simulation time per step (in seconds)", simulationTime); cmd.AddValue ("channelBonding", "Enable/disable channel bonding (channel width = 20 MHz if false, channel width = 40 MHz if true)", channelBonding); cmd.AddValue ("shortGuardInterval", "Enable/disable short guard interval", shortGuardInterval); cmd.AddValue ("frequency", "Whether working in the 2.4 or 5.0 GHz band (other values gets rejected)", frequency); cmd.AddValue ("udp", "UDP if set to 1, TCP otherwise", udp); cmd.Parse (argc,argv); Gnuplot plot = Gnuplot ("80211n-mimo-throughput.eps"); for (uint32_t i = 0; i < modes.size (); i++) //MCS { std::cout << modes[i] << std::endl; Gnuplot2dDataset dataset (modes[i]); for (int d = 0; d <= 100; ) //distance { std::cout << "Distance = " << d << "m: " << std::endl; uint32_t payloadSize; //1500 byte IP packet if (udp) { payloadSize = 1472; //bytes } else { payloadSize = 1448; //bytes Config::SetDefault ("ns3::TcpSocket::SegmentSize", UintegerValue (payloadSize)); } uint8_t nStreams = 1 + (i / 8); //number of MIMO streams NodeContainer wifiStaNode; wifiStaNode.Create (1); NodeContainer wifiApNode; wifiApNode.Create (1); YansWifiChannelHelper channel = YansWifiChannelHelper::Default (); YansWifiPhyHelper phy = YansWifiPhyHelper::Default (); phy.SetChannel (channel.Create ()); // Set guard interval phy.Set ("ShortGuardEnabled", BooleanValue (shortGuardInterval)); // Set MIMO capabilities phy.Set ("Antennas", UintegerValue (nStreams)); phy.Set ("MaxSupportedTxSpatialStreams", UintegerValue (nStreams)); phy.Set ("MaxSupportedRxSpatialStreams", UintegerValue (nStreams)); WifiMacHelper mac; WifiHelper wifi; if (frequency == 5.0) { wifi.SetStandard (WIFI_PHY_STANDARD_80211n_5GHZ); } else if (frequency == 2.4) { wifi.SetStandard (WIFI_PHY_STANDARD_80211n_2_4GHZ); Config::SetDefault ("ns3::LogDistancePropagationLossModel::ReferenceLoss", DoubleValue (40.046)); } else { std::cout << "Wrong frequency value!" << std::endl; return 0; } wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager","DataMode", StringValue (modes[i]), "ControlMode", StringValue (modes[i])); Ssid ssid = Ssid ("ns3-80211n"); mac.SetType ("ns3::StaWifiMac", "Ssid", SsidValue (ssid)); NetDeviceContainer staDevice; staDevice = wifi.Install (phy, mac, wifiStaNode); mac.SetType ("ns3::ApWifiMac", "Ssid", SsidValue (ssid)); NetDeviceContainer apDevice; apDevice = wifi.Install (phy, mac, wifiApNode); // Set channel width if (channelBonding) { Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/ChannelWidth", UintegerValue (40)); } // mobility. MobilityHelper mobility; Ptr positionAlloc = CreateObject (); positionAlloc->Add (Vector (0.0, 0.0, 0.0)); positionAlloc->Add (Vector (d, 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; if (udp) { //UDP flow uint16_t port = 9; UdpServerHelper server (port); serverApp = server.Install (wifiStaNode.Get (0)); serverApp.Start (Seconds (0.0)); serverApp.Stop (Seconds (simulationTime + 1)); UdpClientHelper client (staNodeInterface.GetAddress (0), port); client.SetAttribute ("MaxPackets", UintegerValue (4294967295u)); client.SetAttribute ("Interval", TimeValue (Time ("0.00001"))); //packets/s client.SetAttribute ("PacketSize", UintegerValue (payloadSize)); ApplicationContainer clientApp = client.Install (wifiApNode.Get (0)); clientApp.Start (Seconds (1.0)); clientApp.Stop (Seconds (simulationTime + 1)); } else { //TCP flow uint16_t port = 50000; Address localAddress (InetSocketAddress (Ipv4Address::GetAny (), port)); PacketSinkHelper packetSinkHelper ("ns3::TcpSocketFactory", localAddress); serverApp = packetSinkHelper.Install (wifiStaNode.Get (0)); serverApp.Start (Seconds (0.0)); serverApp.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 AddressValue remoteAddress (InetSocketAddress (staNodeInterface.GetAddress (0), port)); onoff.SetAttribute ("Remote", remoteAddress); ApplicationContainer clientApp = onoff.Install (wifiApNode.Get (0)); clientApp.Start (Seconds (1.0)); clientApp.Stop (Seconds (simulationTime + 1)); } Ipv4GlobalRoutingHelper::PopulateRoutingTables (); Simulator::Stop (Seconds (simulationTime + 1)); Simulator::Run (); Simulator::Destroy (); double throughput = 0; if (udp) { //UDP uint64_t totalPacketsThrough = DynamicCast (serverApp.Get (0))->GetReceived (); throughput = totalPacketsThrough * payloadSize * 8 / (simulationTime * 1000000.0); //Mbit/s } else { //TCP uint64_t totalPacketsThrough = DynamicCast (serverApp.Get (0))->GetTotalRx (); throughput = totalPacketsThrough * 8 / (simulationTime * 1000000.0); //Mbit/s } dataset.Add (d, throughput); std::cout << throughput << " Mbit/s" << std::endl; d += step; } plot.AddDataset (dataset); } plot.SetTerminal ("postscript eps color enh \"Times-BoldItalic\""); plot.SetLegend ("Distance (Meters)", "Throughput (Mbit/s)"); plot.SetExtra ("set xrange [0:100]\n\ set yrange [0:600]\n\ set ytics 0,50,600\n\ set style line 1 dashtype 1 linewidth 5\n\ set style line 2 dashtype 1 linewidth 5\n\ set style line 3 dashtype 1 linewidth 5\n\ set style line 4 dashtype 1 linewidth 5\n\ set style line 5 dashtype 1 linewidth 5\n\ set style line 6 dashtype 1 linewidth 5\n\ set style line 7 dashtype 1 linewidth 5\n\ set style line 8 dashtype 1 linewidth 5\n\ set style line 9 dashtype 2 linewidth 5\n\ set style line 10 dashtype 2 linewidth 5\n\ set style line 11 dashtype 2 linewidth 5\n\ set style line 12 dashtype 2 linewidth 5\n\ set style line 13 dashtype 2 linewidth 5\n\ set style line 14 dashtype 2 linewidth 5\n\ set style line 15 dashtype 2 linewidth 5\n\ set style line 16 dashtype 2 linewidth 5\n\ set style line 17 dashtype 3 linewidth 5\n\ set style line 18 dashtype 3 linewidth 5\n\ set style line 19 dashtype 3 linewidth 5\n\ set style line 20 dashtype 3 linewidth 5\n\ set style line 21 dashtype 3 linewidth 5\n\ set style line 22 dashtype 3 linewidth 5\n\ set style line 23 dashtype 3 linewidth 5\n\ set style line 24 dashtype 3 linewidth 5\n\ set style line 25 dashtype 4 linewidth 5\n\ set style line 26 dashtype 4 linewidth 5\n\ set style line 27 dashtype 4 linewidth 5\n\ set style line 28 dashtype 4 linewidth 5\n\ set style line 29 dashtype 4 linewidth 5\n\ set style line 30 dashtype 4 linewidth 5\n\ set style line 31 dashtype 4 linewidth 5\n\ set style line 32 dashtype 4 linewidth 5\n\ set style increment user" ); plot.GenerateOutput (file); file.close (); return 0; }