From b7d98aea1e69d9c1933e0ce3d0b63cf1814307f1 Mon Sep 17 00:00:00 2001 From: Pavel Boyko Date: Tue, 9 Mar 2010 11:47:18 +0300 Subject: [PATCH] Missed file --- examples/wireless/wifi-hidden-terminal.cc | 133 ++++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 examples/wireless/wifi-hidden-terminal.cc diff --git a/examples/wireless/wifi-hidden-terminal.cc b/examples/wireless/wifi-hidden-terminal.cc new file mode 100644 index 000000000..d961ee992 --- /dev/null +++ b/examples/wireless/wifi-hidden-terminal.cc @@ -0,0 +1,133 @@ +/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ +/* + * Copyright (c) 2010 IITP RAS + * + * 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: Pavel Boyko + */ + +/* + * Classical hidden terminal problem and its RTS/CTS solution. + * + * Topology: [node 0] <-- -50 dB --> [node 1] <-- -50 dB --> [node 2] + * + * This example illustrates the use of + * - Wifi in ad-hoc mode + * - Matrix propagation loss model + * - Use of OnOffApplication to generate CBR stream + * - IP flow monitor + */ +#include "ns3/core-module.h" +#include "ns3/common-module.h" +#include "ns3/node-module.h" +#include "ns3/helper-module.h" +#include "ns3/mobility-module.h" +#include "ns3/flow-monitor-module.h" + +using namespace ns3; + +/// Run single 10 seconds experiment with enabled or disabled RTS/CTS mechanism +void experiment (bool enableCtsRts) +{ + // 0. Enable or disable CTS/RTS + UintegerValue ctsThr = (enableCtsRts ? UintegerValue (100) : UintegerValue (2200)); + Config::SetDefault ("ns3::WifiRemoteStationManager::RtsCtsThreshold", ctsThr); + + // 1. Create 3 nodes + NodeContainer nodes; + nodes.Create (3); + + // 2. Place nodes somehow, this is required by every wireless simulation + for (size_t i = 0; i < 3; ++i) + { + nodes.Get(i)->AggregateObject (CreateObject ()); + } + + // 3. Create propagation loss matrix + Ptr lossModel = CreateObject (); + lossModel->SetDefaultLoss (200); // set default loss to 200 dB (no link) + lossModel->SetLoss (nodes.Get (0), nodes.Get (1), 50); // set symmetric loss 0 <-> 1 to 50 dB + lossModel->SetLoss (nodes.Get (2), nodes.Get (1), 50); // set symmetric loss 2 <-> 1 to 50 dB + + // 4. Create & setup wifi channel + Ptr wifiChannel = CreateObject (); + wifiChannel->SetPropagationLossModel (lossModel); + wifiChannel->SetPropagationDelayModel (CreateObject ()); + + // 5. Install wireless devices + WifiHelper wifi; + wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager", + "DataMode",StringValue ("wifib-2mbs"), + "ControlMode",StringValue ("wifib-1mbs")); + YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default (); + wifiPhy.SetChannel (wifiChannel); + NqosWifiMacHelper wifiMac = NqosWifiMacHelper::Default (); + wifiMac.SetType ("ns3::AdhocWifiMac"); // use ad-hoc MAC + NetDeviceContainer devices = wifi.Install (wifiPhy, wifiMac, nodes); + + // 6. Install TCP/IP stack & assign IP addresses + InternetStackHelper internet; + internet.Install (nodes); + Ipv4AddressHelper ipv4; + ipv4.SetBase ("10.0.0.0", "255.0.0.0"); + ipv4.Assign (devices); + + // 7. Install applications: two dense CBR streams node 0 -> node 1 and node 2 -> node 1 + ApplicationContainer apps; + OnOffHelper onOffHelper ("ns3::UdpSocketFactory", InetSocketAddress (Ipv4Address ("10.0.0.2"), 9)); + onOffHelper.SetAttribute ("DataRate", StringValue ("10Mbps")); + onOffHelper.SetAttribute ("PacketSize", UintegerValue (200)); + onOffHelper.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1))); + onOffHelper.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0))); + for (size_t i = 0; i < 3; i += 2) + { + apps.Add (onOffHelper.Install (nodes.Get (i))); + } + + // 8. Install FlowMonitor on all nodes + FlowMonitorHelper flowmon; + Ptr monitor = flowmon.InstallAll(); + + // 9. Run simulation for 10 seconds + Simulator::Stop (Seconds (10)); + Simulator::Run (); + + // 10. Print per flow statistics + monitor->CheckForLostPackets (); + Ptr classifier = DynamicCast (flowmon.GetClassifier ()); + std::map stats = monitor->GetFlowStats (); + for (std::map::const_iterator i = stats.begin (); i != stats.end (); ++i) + { + Ipv4FlowClassifier::FiveTuple t = classifier->FindFlow (i->first); + std::cout << "Flow " << i->first << " (" << t.sourceAddress << " -> " << t.destinationAddress << ")\n"; + std::cout << " Tx Bytes: " << i->second.txBytes << "\n"; + std::cout << " Rx Bytes: " << i->second.rxBytes << "\n"; + std::cout << " Throughput: " << i->second.rxBytes * 8.0 / 10.0 / 1024 / 1024 << " Mbps\n"; + } + + // 11. Cleanup + Simulator::Destroy (); +} + +int main (int argc, char **argv) +{ + std::cout << "Hidden station experiment with RTS/CTS disabled:\n" << std::flush; + experiment (false); + std::cout << "------------------------------------------------\n"; + std::cout << "Hidden station experiment with RTS/CTS enabled:\n"; + experiment (true); + + return 0; +}