--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/wireless/wifi-simple-interference.cc Tue Oct 06 19:34:29 2009 -0700
@@ -0,0 +1,259 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2009 The Boeing Company
+ *
+ * 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
+ *
+ */
+
+//
+// This script configures three nodes on an 802.11b physical layer, with
+// 802.11b NICs in adhoc mode. There is a transmitter, receiver, and
+// interferer. The transmitter sends one packet to the receiver and
+// the receiver receives it with a certain configurable RSS (by default,
+// -80 dBm). The interferer does not do carrier sense and also sends
+// the packet to interfere with the primary packet. The channel model
+// is clear channel.
+//
+// Therefore, at the receiver, the reception looks like this:
+//
+// ------------------time---------------->
+// t0
+//
+// |------------------------------------|
+// | |
+// | primary received frame (time t0) |
+// | |
+// |------------------------------------|
+//
+//
+// t1
+// |-----------------------------------|
+// | |
+// | interfering frame (time t1) |
+// | |
+// |-----------------------------------|
+//
+// The orientation is:
+// n2 ---------> n0 <---------- n1
+// interferer receiver transmitter
+//
+// The configurable parameters are:
+// - Prss (primary rss) (-80 dBm default)
+// - Irss (interfering rss) (-95 dBm default)
+// - delta (microseconds, (t1-t0), may be negative, default 0)
+// - PpacketSize (primary packet size) (bytes, default 1000)
+// - IpacketSize (interferer packet size) (bytes, default 1000)
+//
+// For instance, for this configuration, the interfering frame arrives
+// at -90 dBm with a time offset of 3.2 microseconds:
+//
+// ./waf --run "scratch/wifi-simple-interference --Irss=-90 --delta=3.2"
+//
+// Note that all ns-3 attributes (not just the ones exposed in the below
+// script) can be changed at command line; see the documentation.
+//
+// This script can also be helpful to put the Wifi layer into verbose
+// logging mode; this command will turn on all wifi logging:
+//
+// ./waf --run "scratch/wifi-simple-interference --verbose=1"
+//
+// When you are done, you will notice a pcap trace file in your directory.
+// If you have tcpdump installed, you can try this:
+//
+// tcpdump -r wifi-simple-interference-0-0.pcap -nn -tt
+// reading from file wifi-simple-interference-0-0.pcap, link-type IEEE802_11_RADIO (802.11 plus BSD radio information header)
+// 10.008704 10008704us tsft 1.0 Mb/s 2437 MHz (0x00c0) -80dB signal -98dB noise IP 10.1.1.2.49153 > 10.1.1.255.80: UDP, length 1000
+//
+// Next, try this command and look at the tcpdump-- you should see two packets
+// that are no longer interfering:
+// ./waf --run "wifi-simple-interference --delta=30000"
+
+#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/contrib-module.h"
+#include "ns3/wifi-module.h"
+
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <string>
+
+NS_LOG_COMPONENT_DEFINE ("WifiSimpleInterference");
+
+using namespace ns3;
+
+void 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 ());
+}
+
+static void GenerateTraffic (Ptr<Socket> socket, uint32_t pktSize,
+ uint32_t pktCount, Time pktInterval )
+{
+ if (pktCount > 0)
+ {
+ socket->Send (Create<Packet> (pktSize));
+ Simulator::Schedule (pktInterval, &GenerateTraffic,
+ socket, pktSize,pktCount-1, pktInterval);
+ }
+ else
+ {
+ socket->Close ();
+ }
+}
+
+
+int main (int argc, char *argv[])
+{
+// LogComponentEnable ("InterferenceHelper", LOG_LEVEL_ALL);
+
+ std::string phyMode ("wifib-1mbs");
+ double Prss = -80; // -dBm
+ double Irss = -95; // -dBm
+ double delta = 0; // microseconds
+ uint32_t PpacketSize = 1000; // bytes
+ uint32_t IpacketSize = 1000; // bytes
+ bool verbose = false;
+
+ // these are not command line arguments for this version
+ 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
+ CommandLine cmd;
+
+ cmd.AddValue ("phyMode", "Wifi Phy mode", phyMode);
+ cmd.AddValue ("Prss", "Intended primary received signal strength (dBm)", Prss);
+ cmd.AddValue ("Irss", "Intended interfering received signal strength (dBm)", Irss);
+ cmd.AddValue ("delta", "time offset (microseconds) for interfering signal", delta);
+ cmd.AddValue ("PpacketSize", "size of application packet sent", PpacketSize);
+ cmd.AddValue ("IpacketSize", "size of interfering packet sent", IpacketSize);
+ cmd.AddValue ("verbose", "turn on all WifiNetDevice log components", verbose);
+
+ cmd.Parse (argc, argv);
+ // 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;
+ if (verbose)
+ {
+ wifi.EnableLogComponents (); // Turn on all Wifi logging
+ }
+ 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 (&ReceivePacket));
+
+ 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);
+
+ // Tracing
+ wifiPhy.EnablePcap ("wifi-simple-interference", devices.Get (0));
+
+ // Output what we are doing
+ NS_LOG_UNCOND ("Primary packet RSS=" << Prss << " dBm and interferer RSS=" << Irss << " dBm at time offset=" << delta << " ms");
+
+ 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 0;
+}
+