--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/wireless/wifi-hidden-terminal.cc	Tue Mar 09 11:47:18 2010 +0300
@@ -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 <boyko@iitp.ru>
+ */
+
+/*
+ * 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<ConstantPositionMobilityModel> ());
+    }
+  
+  // 3. Create propagation loss matrix
+  Ptr<MatrixPropagationLossModel> lossModel = CreateObject<MatrixPropagationLossModel> ();
+  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<YansWifiChannel> wifiChannel = CreateObject <YansWifiChannel> ();
+  wifiChannel->SetPropagationLossModel (lossModel);
+  wifiChannel->SetPropagationDelayModel (CreateObject <ConstantSpeedPropagationDelayModel> ());
+   
+  // 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<FlowMonitor> monitor = flowmon.InstallAll();
+  
+  // 9. Run simulation for 10 seconds
+  Simulator::Stop (Seconds (10));
+  Simulator::Run ();
+  
+  // 10. Print per flow statistics
+  monitor->CheckForLostPackets ();
+  Ptr<Ipv4FlowClassifier> classifier = DynamicCast<Ipv4FlowClassifier> (flowmon.GetClassifier ());
+  std::map<FlowId, FlowMonitor::FlowStats> stats = monitor->GetFlowStats ();
+  for (std::map<FlowId, FlowMonitor::FlowStats>::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;
+}