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Add wifi-interference test suite

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This commit is contained in:
Tom Henderson
2009-09-28 01:06:21 -07:00
parent b6fcdf98e6
commit d80e9fc4ac
2 changed files with 279 additions and 0 deletions
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278
src/test/ns3wifi/wifi-interference-test-suite.cc Normal file
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@@ -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;

1
src/test/ns3wifi/wscript
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@@ -7,6 +7,7 @@ def build(bld):
ns3wifi = bld.create_ns3_module('ns3wifi')
ns3wifi.source = [
'propagation-loss-models-test-suite.cc',
'wifi-interference-test-suite.cc',
]
headers = bld.new_task_gen('ns3header')
headers.module = 'ns3wifi'