--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/test/ns3wifi/wifi-interference-test-suite.cc Mon Sep 28 01:06:21 2009 -0700
@@ -0,0 +1,278 @@
+/*
+ * Copyright (c) 2009 University of Washington
+ *
+ * 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
+ */
+
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <string>
+
+#include "ns3/log.h"
+#include "ns3/callback.h"
+#include "ns3/abort.h"
+#include "ns3/test.h"
+#include "ns3/pcap-file.h"
+#include "ns3/config.h"
+#include "ns3/string.h"
+#include "ns3/uinteger.h"
+#include "ns3/data-rate.h"
+#include "ns3/inet-socket-address.h"
+#include "ns3/internet-stack-helper.h"
+#include "ns3/ipv4-address-helper.h"
+#include "ns3/tcp-socket-factory.h"
+#include "ns3/yans-wifi-helper.h"
+#include "ns3/propagation-loss-model.h"
+#include "ns3/propagation-delay-model.h"
+#include "ns3/yans-wifi-channel.h"
+#include "ns3/yans-wifi-phy.h"
+#include "ns3/wifi-net-device.h"
+#include "ns3/mobility-helper.h"
+#include "ns3/constant-position-mobility-model.h"
+#include "ns3/nqos-wifi-mac-helper.h"
+#include "ns3/simulator.h"
+
+NS_LOG_COMPONENT_DEFINE ("WifiInterferenceTestSuite");
+
+using namespace ns3;
+
+class WifiInterferenceTestCase : public TestCase
+{
+public:
+ WifiInterferenceTestCase ();
+ virtual ~WifiInterferenceTestCase ();
+
+private:
+ virtual bool DoRun (void);
+ void ReceivePacket (Ptr<Socket> socket);
+ static void GenerateTraffic (Ptr<Socket> socket, uint32_t pktSize, uint32_t pktCount, Time pktInterval);
+ void PrintEndSync (std::string context, uint32_t dataRate, double snr, double per);
+ double WifiSimpleInterference (std::string phyMode, double Prss, double Irss, double delta, uint32_t PpacketSize,
+ uint32_t IpacketSize, bool verbose, InternetStackHelper internet);
+ double m_PER;
+ double m_SNR;
+ uint32_t m_DataRate;
+};
+
+// Add some help text to this case to describe what it is intended to test
+WifiInterferenceTestCase::WifiInterferenceTestCase ()
+ : TestCase ("Test interference calculation when interfering frame exactly overlaps intended frame")
+{
+}
+
+WifiInterferenceTestCase::~WifiInterferenceTestCase ()
+{
+}
+
+void
+WifiInterferenceTestCase::ReceivePacket (Ptr<Socket> socket)
+{
+ Address addr;
+ socket->GetSockName (addr);
+ InetSocketAddress iaddr = InetSocketAddress::ConvertFrom (addr);
+ NS_LOG_UNCOND ("Received one packet! Socket: " << iaddr.GetIpv4 () << " port: " << iaddr.GetPort ());
+}
+
+void
+WifiInterferenceTestCase::GenerateTraffic (Ptr<Socket> socket, uint32_t pktSize, uint32_t pktCount, Time pktInterval)
+{
+ if (pktCount > 0)
+ {
+ socket->Send (Create<Packet> (pktSize));
+ Simulator::Schedule (pktInterval, &WifiInterferenceTestCase::GenerateTraffic, socket, pktSize, pktCount-1, pktInterval);
+ }
+ else
+ {
+ socket->Close ();
+ }
+}
+
+void
+WifiInterferenceTestCase::PrintEndSync (std::string context, uint32_t dataRate, double snr, double per)
+{
+ NS_LOG_UNCOND ("EndSync: Received frame with dataRate=" << dataRate << ", SNR=" << snr << ", PER =" << per);
+ m_PER = per;
+ m_SNR = snr;
+ m_DataRate = dataRate;
+}
+
+double
+WifiInterferenceTestCase::WifiSimpleInterference (std::string phyMode,double Prss, double Irss, double delta, uint32_t PpacketSize, uint32_t IpacketSize, bool verbose, InternetStackHelper internet)
+{
+
+ uint32_t numPackets = 1;
+ double interval = 1.0; // seconds
+ double startTime = 10.0; // seconds
+ double distanceToRx = 100.0; // meters
+
+ double offset = 91; // This is a magic number used to set the
+ // transmit power, based on other configuration
+
+ m_PER = 0;
+ m_SNR = 0;
+ m_DataRate = 0;
+
+ // Convert to time object
+ Time interPacketInterval = Seconds (interval);
+
+ // disable fragmentation for frames below 2200 bytes
+ Config::SetDefault ("ns3::WifiRemoteStationManager::FragmentationThreshold", StringValue ("2200"));
+ // turn off RTS/CTS for frames below 2200 bytes
+ Config::SetDefault ("ns3::WifiRemoteStationManager::RtsCtsThreshold", StringValue ("2200"));
+ // Fix non-unicast data rate to be the same as that of unicast
+ Config::SetDefault ("ns3::WifiRemoteStationManager::NonUnicastMode",
+ StringValue (phyMode));
+
+ NodeContainer c;
+ c.Create (3);
+
+ // The below set of helpers will help us to put together the wifi NICs we want
+ WifiHelper wifi;
+ wifi.SetStandard (WIFI_PHY_STANDARD_80211b);
+
+ YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();
+ // This is one parameter that matters when using FixedRssLossModel
+ // set it to zero; otherwise, gain will be added
+ wifiPhy.Set ("RxGain", DoubleValue (0) );
+ wifiPhy.Set ("CcaMode1Threshold", DoubleValue (0.0) );
+
+ // ns-3 support RadioTap and Prism tracing extensions for 802.11b
+ wifiPhy.SetPcapFormat (YansWifiPhyHelper::PCAP_FORMAT_80211_RADIOTAP);
+
+ YansWifiChannelHelper wifiChannel ;
+ wifiChannel.SetPropagationDelay ("ns3::ConstantSpeedPropagationDelayModel");
+ wifiChannel.AddPropagationLoss ("ns3::LogDistancePropagationLossModel");
+ wifiPhy.SetChannel (wifiChannel.Create ());
+
+ // Add a non-QoS upper mac, and disable rate control
+ NqosWifiMacHelper wifiMac = NqosWifiMacHelper::Default ();
+ wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
+ "DataMode",StringValue(phyMode),
+ "ControlMode",StringValue(phyMode));
+ // Set it to adhoc mode
+ wifiMac.SetType ("ns3::AdhocWifiMac");
+ NetDeviceContainer devices = wifi.Install (wifiPhy, wifiMac, c.Get (0));
+ // This will disable these sending devices from detecting a signal
+ // so that they do not backoff
+ wifiPhy.Set ("EnergyDetectionThreshold", DoubleValue (0.0) );
+ wifiPhy.Set ("TxGain", DoubleValue (offset + Prss) );
+ devices.Add (wifi.Install (wifiPhy, wifiMac, c.Get (1)));
+ wifiPhy.Set ("TxGain", DoubleValue (offset + Irss) );
+ devices.Add (wifi.Install (wifiPhy, wifiMac, c.Get (2)));
+
+ // Note that with FixedRssLossModel, the positions below are not
+ // used for received signal strength.
+ MobilityHelper mobility;
+ Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();
+ positionAlloc->Add (Vector (0.0, 0.0, 0.0));
+ positionAlloc->Add (Vector (distanceToRx, 0.0, 0.0));
+ positionAlloc->Add (Vector (-1*distanceToRx, 0.0, 0.0));
+ mobility.SetPositionAllocator (positionAlloc);
+ mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
+ mobility.Install (c);
+
+ // InternetStackHelper internet;
+ internet.Install (c);
+
+ Ipv4AddressHelper ipv4;
+ NS_LOG_INFO ("Assign IP Addresses.");
+ ipv4.SetBase ("10.1.1.0", "255.255.255.0");
+ Ipv4InterfaceContainer i = ipv4.Assign (devices);
+
+ TypeId tid = TypeId::LookupByName ("ns3::UdpSocketFactory");
+ Ptr<Socket> recvSink = Socket::CreateSocket (c.Get (0), tid);
+ InetSocketAddress local = InetSocketAddress (Ipv4Address("10.1.1.1"), 80);
+ recvSink->Bind (local);
+ recvSink->SetRecvCallback (MakeCallback (&WifiInterferenceTestCase::ReceivePacket, this));
+
+ Ptr<Socket> source = Socket::CreateSocket (c.Get (1), tid);
+ InetSocketAddress remote = InetSocketAddress (Ipv4Address ("255.255.255.255"), 80);
+ source->Connect (remote);
+
+ // Interferer will send to a different port; we will not see a
+ // "Received packet" message
+ Ptr<Socket> interferer = Socket::CreateSocket (c.Get (2), tid);
+ InetSocketAddress interferingAddr = InetSocketAddress (Ipv4Address ("255.255.255.255"), 49000);
+ interferer->Connect (interferingAddr);
+
+ Config::Connect ("/NodeList/0/DeviceList/0/$ns3::WifiNetDevice/Phy/$ns3::YansWifiPhy/EndSync", MakeCallback (&WifiInterferenceTestCase::PrintEndSync, this));
+ // Tracing
+ wifiPhy.EnablePcap ("wifi-simple-interference", devices.Get (0));
+
+ Simulator::Schedule (Seconds (startTime), &GenerateTraffic,
+ source, PpacketSize, numPackets, interPacketInterval);
+
+ Simulator::Schedule (Seconds (startTime + delta/1000000.0), &GenerateTraffic,
+ interferer, IpacketSize, numPackets, interPacketInterval);
+
+ Simulator::Run ();
+ Simulator::Destroy ();
+
+ return m_PER;
+}
+
+bool
+WifiInterferenceTestCase::DoRun (void)
+{
+
+ std::string phyMode ("wifib-1mbs");
+ double Prss = -90; // -dBm
+ double Irss = -90; // -dBm
+ double delta = 0; // microseconds
+ uint32_t PpacketSize = 1000; // bytes
+ uint32_t IpacketSize = 1000; // bytes
+ bool verbose = false;
+ double PER, PER1, PER2;
+ InternetStackHelper internet;
+
+ // Compute the packet error rate (PER) when delta=0 microseconds. This
+ // means that the interferer arrives at exactly the same time as the
+ // intended packet
+ PER = WifiSimpleInterference (phyMode,Prss,Irss,delta,PpacketSize,IpacketSize,verbose,internet);
+
+ // Now rerun this test case and compute the PER when the delta time between
+ // arrival of the intended frame and interferer is 1 microsecond.
+ delta = 1;
+ PER1 = WifiSimpleInterference (phyMode,Prss,Irss,delta,PpacketSize,IpacketSize,verbose,internet);
+
+ // Now rerun this test case and compute the PER when the delta time between
+ // arrival of the intended frame and interferer is 2 microseconds.
+ delta = 2;
+ PER2 = WifiSimpleInterference (phyMode,Prss,Irss,delta,PpacketSize,IpacketSize,verbose,internet);
+
+ double PERDiff1 = PER - PER1;
+
+ double PERDiff2 = PER1 - PER2;
+
+ NS_TEST_ASSERT_MSG_EQ (PERDiff1, PERDiff2,
+ "The PER difference due to 1 microsecond difference in arrival shouldn't depend on absolute arrival");
+
+ return false;
+}
+
+class WifiInterferenceTestSuite : public TestSuite
+{
+public:
+ WifiInterferenceTestSuite ();
+};
+
+WifiInterferenceTestSuite::WifiInterferenceTestSuite ()
+ : TestSuite ("ns3-wifi-interference", UNIT)
+{
+ AddTestCase (new WifiInterferenceTestCase);
+}
+
+WifiInterferenceTestSuite wifiInterferenceTestSuite;
+