348 lines
14 KiB
C++
348 lines
14 KiB
C++
/*
|
|
* Copyright (c) 2009 MIRKO BANCHI
|
|
*
|
|
* 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: Mirko Banchi <mk.banchi@gmail.com>
|
|
* Sebastien Deronne <sebastien.deronne@gmail.com>
|
|
*/
|
|
|
|
#include "ns3/boolean.h"
|
|
#include "ns3/command-line.h"
|
|
#include "ns3/config.h"
|
|
#include "ns3/double.h"
|
|
#include "ns3/enum.h"
|
|
#include "ns3/ht-phy.h"
|
|
#include "ns3/internet-stack-helper.h"
|
|
#include "ns3/ipv4-address-helper.h"
|
|
#include "ns3/ipv4-global-routing-helper.h"
|
|
#include "ns3/log.h"
|
|
#include "ns3/mobility-helper.h"
|
|
#include "ns3/on-off-helper.h"
|
|
#include "ns3/packet-sink-helper.h"
|
|
#include "ns3/packet-sink.h"
|
|
#include "ns3/ssid.h"
|
|
#include "ns3/string.h"
|
|
#include "ns3/tuple.h"
|
|
#include "ns3/udp-client-server-helper.h"
|
|
#include "ns3/udp-server.h"
|
|
#include "ns3/uinteger.h"
|
|
#include "ns3/yans-wifi-channel.h"
|
|
#include "ns3/yans-wifi-helper.h"
|
|
|
|
// This is a simple example in order to show how to configure an IEEE 802.11n Wi-Fi network.
|
|
//
|
|
// It outputs the UDP or TCP goodput for every HT MCS value, which depends on the MCS value (0 to
|
|
// 7), the channel width (20 or 40 MHz) and the guard interval (long or short). The PHY bitrate is
|
|
// constant over all the simulation run. The user can also specify the distance between the access
|
|
// point and the station: the larger the distance the smaller the goodput.
|
|
//
|
|
// The simulation assumes a single station in an infrastructure network:
|
|
//
|
|
// STA AP
|
|
// * *
|
|
// | |
|
|
// n1 n2
|
|
//
|
|
// Packets in this simulation belong to BestEffort Access Class (AC_BE).
|
|
|
|
using namespace ns3;
|
|
|
|
NS_LOG_COMPONENT_DEFINE("ht-wifi-network");
|
|
|
|
int
|
|
main(int argc, char* argv[])
|
|
{
|
|
bool udp{true};
|
|
bool useRts{false};
|
|
Time simulationTime{"10s"};
|
|
double distance{1.0}; // meters
|
|
double frequency{5}; // whether 2.4 or 5 GHz
|
|
int mcs{-1}; // -1 indicates an unset value
|
|
double minExpectedThroughput{0.0};
|
|
double maxExpectedThroughput{0.0};
|
|
|
|
CommandLine cmd(__FILE__);
|
|
cmd.AddValue("frequency",
|
|
"Whether working in the 2.4 or 5.0 GHz band (other values gets rejected)",
|
|
frequency);
|
|
cmd.AddValue("distance",
|
|
"Distance in meters between the station and the access point",
|
|
distance);
|
|
cmd.AddValue("simulationTime", "Simulation time", simulationTime);
|
|
cmd.AddValue("udp", "UDP if set to 1, TCP otherwise", udp);
|
|
cmd.AddValue("useRts", "Enable/disable RTS/CTS", useRts);
|
|
cmd.AddValue("mcs", "if set, limit testing to a specific MCS (0-7)", mcs);
|
|
cmd.AddValue("minExpectedThroughput",
|
|
"if set, simulation fails if the lowest throughput is below this value",
|
|
minExpectedThroughput);
|
|
cmd.AddValue("maxExpectedThroughput",
|
|
"if set, simulation fails if the highest throughput is above this value",
|
|
maxExpectedThroughput);
|
|
cmd.Parse(argc, argv);
|
|
|
|
if (useRts)
|
|
{
|
|
Config::SetDefault("ns3::WifiRemoteStationManager::RtsCtsThreshold", StringValue("0"));
|
|
}
|
|
|
|
double prevThroughput[8] = {0};
|
|
|
|
std::cout << "MCS value"
|
|
<< "\t\t"
|
|
<< "Channel width"
|
|
<< "\t\t"
|
|
<< "short GI"
|
|
<< "\t\t"
|
|
<< "Throughput" << '\n';
|
|
int minMcs = 0;
|
|
int maxMcs = 7;
|
|
if (mcs >= 0 && mcs <= 7)
|
|
{
|
|
minMcs = mcs;
|
|
maxMcs = mcs;
|
|
}
|
|
for (int mcs = minMcs; mcs <= maxMcs; mcs++)
|
|
{
|
|
uint8_t index = 0;
|
|
double previous = 0;
|
|
for (int channelWidth = 20; channelWidth <= 40;)
|
|
{
|
|
for (auto sgi : {false, true})
|
|
{
|
|
uint32_t payloadSize; // 1500 byte IP packet
|
|
if (udp)
|
|
{
|
|
payloadSize = 1472; // bytes
|
|
}
|
|
else
|
|
{
|
|
payloadSize = 1448; // bytes
|
|
Config::SetDefault("ns3::TcpSocket::SegmentSize", UintegerValue(payloadSize));
|
|
}
|
|
|
|
NodeContainer wifiStaNode;
|
|
wifiStaNode.Create(1);
|
|
NodeContainer wifiApNode;
|
|
wifiApNode.Create(1);
|
|
|
|
YansWifiChannelHelper channel = YansWifiChannelHelper::Default();
|
|
YansWifiPhyHelper phy;
|
|
phy.SetChannel(channel.Create());
|
|
|
|
WifiMacHelper mac;
|
|
WifiHelper wifi;
|
|
std::ostringstream ossControlMode;
|
|
|
|
if (frequency == 5.0)
|
|
{
|
|
ossControlMode << "OfdmRate";
|
|
wifi.SetStandard(WIFI_STANDARD_80211n);
|
|
}
|
|
else if (frequency == 2.4)
|
|
{
|
|
wifi.SetStandard(WIFI_STANDARD_80211n);
|
|
ossControlMode << "ErpOfdmRate";
|
|
Config::SetDefault("ns3::LogDistancePropagationLossModel::ReferenceLoss",
|
|
DoubleValue(40.046));
|
|
}
|
|
else
|
|
{
|
|
NS_FATAL_ERROR("Wrong frequency value!");
|
|
}
|
|
|
|
auto nonHtRefRateMbps = HtPhy::GetNonHtReferenceRate(mcs) / 1e6;
|
|
ossControlMode << nonHtRefRateMbps << "Mbps";
|
|
|
|
std::ostringstream ossDataMode;
|
|
ossDataMode << "HtMcs" << mcs;
|
|
wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager",
|
|
"DataMode",
|
|
StringValue(ossDataMode.str()),
|
|
"ControlMode",
|
|
StringValue(ossControlMode.str()));
|
|
// Set guard interval
|
|
wifi.ConfigHtOptions("ShortGuardIntervalSupported", BooleanValue(sgi));
|
|
|
|
Ssid ssid = Ssid("ns3-80211n");
|
|
TupleValue<UintegerValue, UintegerValue, EnumValue<WifiPhyBand>, UintegerValue>
|
|
channelValue;
|
|
WifiPhyBand band = (frequency == 5.0 ? WIFI_PHY_BAND_5GHZ : WIFI_PHY_BAND_2_4GHZ);
|
|
channelValue.Set(WifiPhy::ChannelTuple{0, channelWidth, band, 0});
|
|
|
|
mac.SetType("ns3::StaWifiMac", "Ssid", SsidValue(ssid));
|
|
phy.Set("ChannelSettings", channelValue);
|
|
|
|
NetDeviceContainer staDevice;
|
|
staDevice = wifi.Install(phy, mac, wifiStaNode);
|
|
|
|
mac.SetType("ns3::ApWifiMac",
|
|
"EnableBeaconJitter",
|
|
BooleanValue(false),
|
|
"Ssid",
|
|
SsidValue(ssid));
|
|
|
|
NetDeviceContainer apDevice;
|
|
apDevice = wifi.Install(phy, mac, wifiApNode);
|
|
|
|
int64_t streamNumber = 150;
|
|
streamNumber += wifi.AssignStreams(apDevice, streamNumber);
|
|
streamNumber += wifi.AssignStreams(staDevice, streamNumber);
|
|
|
|
// mobility.
|
|
MobilityHelper mobility;
|
|
Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator>();
|
|
|
|
positionAlloc->Add(Vector(0.0, 0.0, 0.0));
|
|
positionAlloc->Add(Vector(distance, 0.0, 0.0));
|
|
mobility.SetPositionAllocator(positionAlloc);
|
|
|
|
mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
|
|
|
|
mobility.Install(wifiApNode);
|
|
mobility.Install(wifiStaNode);
|
|
|
|
/* Internet stack*/
|
|
InternetStackHelper stack;
|
|
stack.Install(wifiApNode);
|
|
stack.Install(wifiStaNode);
|
|
streamNumber += stack.AssignStreams(wifiApNode, streamNumber);
|
|
streamNumber += stack.AssignStreams(wifiStaNode, streamNumber);
|
|
|
|
Ipv4AddressHelper address;
|
|
address.SetBase("192.168.1.0", "255.255.255.0");
|
|
Ipv4InterfaceContainer staNodeInterface;
|
|
Ipv4InterfaceContainer apNodeInterface;
|
|
|
|
staNodeInterface = address.Assign(staDevice);
|
|
apNodeInterface = address.Assign(apDevice);
|
|
|
|
/* Setting applications */
|
|
const auto maxLoad = HtPhy::GetDataRate(mcs, channelWidth, sgi ? 400 : 800, 1);
|
|
ApplicationContainer serverApp;
|
|
if (udp)
|
|
{
|
|
// UDP flow
|
|
uint16_t port = 9;
|
|
UdpServerHelper server(port);
|
|
serverApp = server.Install(wifiStaNode.Get(0));
|
|
streamNumber += server.AssignStreams(wifiStaNode.Get(0), streamNumber);
|
|
|
|
serverApp.Start(Seconds(0.0));
|
|
serverApp.Stop(simulationTime + Seconds(1.0));
|
|
const auto packetInterval = payloadSize * 8.0 / maxLoad;
|
|
|
|
UdpClientHelper client(staNodeInterface.GetAddress(0), port);
|
|
client.SetAttribute("MaxPackets", UintegerValue(4294967295U));
|
|
client.SetAttribute("Interval", TimeValue(Seconds(packetInterval)));
|
|
client.SetAttribute("PacketSize", UintegerValue(payloadSize));
|
|
ApplicationContainer clientApp = client.Install(wifiApNode.Get(0));
|
|
streamNumber += client.AssignStreams(wifiApNode.Get(0), streamNumber);
|
|
|
|
clientApp.Start(Seconds(1.0));
|
|
clientApp.Stop(simulationTime + Seconds(1.0));
|
|
}
|
|
else
|
|
{
|
|
// TCP flow
|
|
uint16_t port = 50000;
|
|
Address localAddress(InetSocketAddress(Ipv4Address::GetAny(), port));
|
|
PacketSinkHelper packetSinkHelper("ns3::TcpSocketFactory", localAddress);
|
|
serverApp = packetSinkHelper.Install(wifiStaNode.Get(0));
|
|
streamNumber +=
|
|
packetSinkHelper.AssignStreams(wifiStaNode.Get(0), streamNumber);
|
|
|
|
serverApp.Start(Seconds(0.0));
|
|
serverApp.Stop(simulationTime + Seconds(1.0));
|
|
|
|
OnOffHelper onoff("ns3::TcpSocketFactory", Ipv4Address::GetAny());
|
|
onoff.SetAttribute("OnTime",
|
|
StringValue("ns3::ConstantRandomVariable[Constant=1]"));
|
|
onoff.SetAttribute("OffTime",
|
|
StringValue("ns3::ConstantRandomVariable[Constant=0]"));
|
|
onoff.SetAttribute("PacketSize", UintegerValue(payloadSize));
|
|
onoff.SetAttribute("DataRate", DataRateValue(maxLoad));
|
|
AddressValue remoteAddress(
|
|
InetSocketAddress(staNodeInterface.GetAddress(0), port));
|
|
onoff.SetAttribute("Remote", remoteAddress);
|
|
ApplicationContainer clientApp = onoff.Install(wifiApNode.Get(0));
|
|
streamNumber += onoff.AssignStreams(wifiApNode.Get(0), streamNumber);
|
|
|
|
clientApp.Start(Seconds(1.0));
|
|
clientApp.Stop(simulationTime + Seconds(1.0));
|
|
}
|
|
|
|
Ipv4GlobalRoutingHelper::PopulateRoutingTables();
|
|
|
|
Simulator::Stop(simulationTime + Seconds(1.0));
|
|
Simulator::Run();
|
|
|
|
auto rxBytes = 0.0;
|
|
if (udp)
|
|
{
|
|
rxBytes = payloadSize * DynamicCast<UdpServer>(serverApp.Get(0))->GetReceived();
|
|
}
|
|
else
|
|
{
|
|
rxBytes = DynamicCast<PacketSink>(serverApp.Get(0))->GetTotalRx();
|
|
}
|
|
auto throughput = (rxBytes * 8) / simulationTime.GetMicroSeconds(); // Mbit/s
|
|
|
|
Simulator::Destroy();
|
|
|
|
std::cout << mcs << "\t\t\t" << channelWidth << " MHz\t\t\t" << std::boolalpha
|
|
<< sgi << "\t\t\t" << throughput << " Mbit/s" << std::endl;
|
|
|
|
// test first element
|
|
if (mcs == minMcs && channelWidth == 20 && !sgi)
|
|
{
|
|
if (throughput < minExpectedThroughput)
|
|
{
|
|
NS_FATAL_ERROR("Obtained throughput " << throughput << " is not expected!");
|
|
}
|
|
}
|
|
// test last element
|
|
if (mcs == maxMcs && channelWidth == 40 && sgi)
|
|
{
|
|
if (maxExpectedThroughput > 0 && throughput > maxExpectedThroughput)
|
|
{
|
|
NS_FATAL_ERROR("Obtained throughput " << throughput << " is not expected!");
|
|
}
|
|
}
|
|
// test previous throughput is smaller (for the same mcs)
|
|
if (throughput > previous)
|
|
{
|
|
previous = throughput;
|
|
}
|
|
else
|
|
{
|
|
NS_FATAL_ERROR("Obtained throughput " << throughput << " is not expected!");
|
|
}
|
|
// test previous throughput is smaller (for the same channel width and GI)
|
|
if (throughput > prevThroughput[index])
|
|
{
|
|
prevThroughput[index] = throughput;
|
|
}
|
|
else
|
|
{
|
|
NS_FATAL_ERROR("Obtained throughput " << throughput << " is not expected!");
|
|
}
|
|
index++;
|
|
}
|
|
channelWidth *= 2;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|