379 lines
15 KiB
C++
379 lines
15 KiB
C++
/*
|
|
* Copyright (c) 2015 SEBASTIEN DERONNE
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-only
|
|
*
|
|
* Author: 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/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/multi-model-spectrum-channel.h"
|
|
#include "ns3/on-off-helper.h"
|
|
#include "ns3/packet-sink-helper.h"
|
|
#include "ns3/packet-sink.h"
|
|
#include "ns3/spectrum-wifi-helper.h"
|
|
#include "ns3/ssid.h"
|
|
#include "ns3/string.h"
|
|
#include "ns3/udp-client-server-helper.h"
|
|
#include "ns3/udp-server.h"
|
|
#include "ns3/uinteger.h"
|
|
#include "ns3/vht-phy.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 802.11ac Wi-Fi network.
|
|
//
|
|
// It outputs the UDP or TCP goodput for every VHT MCS value, which depends on the MCS value (0 to
|
|
// 9, where 9 is forbidden when the channel width is 20 MHz), the channel width (20, 40, 80 or 160
|
|
// 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("vht-wifi-network");
|
|
|
|
int
|
|
main(int argc, char* argv[])
|
|
{
|
|
bool udp{true};
|
|
bool useRts{false};
|
|
bool use80Plus80{false};
|
|
Time simulationTime{"10s"};
|
|
meter_u distance{1.0};
|
|
int mcs{-1}; // -1 indicates an unset value
|
|
std::string phyModel{"Yans"};
|
|
double minExpectedThroughput{0.0};
|
|
double maxExpectedThroughput{0.0};
|
|
|
|
CommandLine cmd(__FILE__);
|
|
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("use80Plus80", "Enable/disable use of 80+80 MHz", use80Plus80);
|
|
cmd.AddValue("mcs", "if set, limit testing to a specific MCS (0-9)", mcs);
|
|
cmd.AddValue("phyModel",
|
|
"PHY model to use (Yans or Spectrum). If 80+80 MHz is enabled, then Spectrum is "
|
|
"automatically selected",
|
|
phyModel);
|
|
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 (phyModel != "Yans" && phyModel != "Spectrum")
|
|
{
|
|
NS_ABORT_MSG("Invalid PHY model (must be Yans or Spectrum)");
|
|
}
|
|
if (use80Plus80)
|
|
{
|
|
// SpectrumWifiPhy is required for 80+80 MHz
|
|
phyModel = "Spectrum";
|
|
}
|
|
|
|
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 = 9;
|
|
if (mcs >= 0 && mcs <= 9)
|
|
{
|
|
minMcs = mcs;
|
|
maxMcs = mcs;
|
|
}
|
|
for (int mcs = minMcs; mcs <= maxMcs; mcs++)
|
|
{
|
|
uint8_t index = 0;
|
|
double previous = 0;
|
|
for (int channelWidth = 20; channelWidth <= 160;)
|
|
{
|
|
if (mcs == 9 && channelWidth == 20)
|
|
{
|
|
channelWidth *= 2;
|
|
continue;
|
|
}
|
|
const auto is80Plus80 = (use80Plus80 && (channelWidth == 160));
|
|
const std::string widthStr = is80Plus80 ? "80+80" : std::to_string(channelWidth);
|
|
const auto segmentWidthStr = is80Plus80 ? "80" : widthStr;
|
|
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);
|
|
|
|
NetDeviceContainer apDevice;
|
|
NetDeviceContainer staDevice;
|
|
WifiMacHelper mac;
|
|
WifiHelper wifi;
|
|
std::string channelStr{"{0, " + segmentWidthStr + ", BAND_5GHZ, 0}"};
|
|
|
|
std::ostringstream ossControlMode;
|
|
auto nonHtRefRateMbps = VhtPhy::GetNonHtReferenceRate(mcs) / 1e6;
|
|
ossControlMode << "OfdmRate" << nonHtRefRateMbps << "Mbps";
|
|
|
|
std::ostringstream ossDataMode;
|
|
ossDataMode << "VhtMcs" << mcs;
|
|
|
|
if (is80Plus80)
|
|
{
|
|
channelStr += std::string(";") + channelStr;
|
|
}
|
|
|
|
wifi.SetStandard(WIFI_STANDARD_80211ac);
|
|
wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager",
|
|
"DataMode",
|
|
StringValue(ossDataMode.str()),
|
|
"ControlMode",
|
|
StringValue(ossControlMode.str()));
|
|
|
|
// Set guard interval
|
|
wifi.ConfigHtOptions("ShortGuardIntervalSupported", BooleanValue(sgi));
|
|
|
|
Ssid ssid = Ssid("ns3-80211ac");
|
|
|
|
if (phyModel == "Spectrum")
|
|
{
|
|
auto spectrumChannel = CreateObject<MultiModelSpectrumChannel>();
|
|
auto lossModel = CreateObject<LogDistancePropagationLossModel>();
|
|
spectrumChannel->AddPropagationLossModel(lossModel);
|
|
|
|
SpectrumWifiPhyHelper phy;
|
|
phy.SetPcapDataLinkType(WifiPhyHelper::DLT_IEEE802_11_RADIO);
|
|
phy.SetChannel(spectrumChannel);
|
|
|
|
phy.Set("ChannelSettings",
|
|
StringValue("{0, " + std::to_string(channelWidth) + ", BAND_5GHZ, 0}"));
|
|
|
|
mac.SetType("ns3::StaWifiMac", "Ssid", SsidValue(ssid));
|
|
staDevice = wifi.Install(phy, mac, wifiStaNode);
|
|
|
|
mac.SetType("ns3::ApWifiMac",
|
|
"EnableBeaconJitter",
|
|
BooleanValue(false),
|
|
"Ssid",
|
|
SsidValue(ssid));
|
|
apDevice = wifi.Install(phy, mac, wifiApNode);
|
|
}
|
|
else
|
|
{
|
|
auto channel = YansWifiChannelHelper::Default();
|
|
YansWifiPhyHelper phy;
|
|
phy.SetPcapDataLinkType(WifiPhyHelper::DLT_IEEE802_11_RADIO);
|
|
phy.SetChannel(channel.Create());
|
|
|
|
phy.Set("ChannelSettings",
|
|
StringValue("{0, " + std::to_string(channelWidth) + ", BAND_5GHZ, 0}"));
|
|
|
|
mac.SetType("ns3::StaWifiMac", "Ssid", SsidValue(ssid));
|
|
staDevice = wifi.Install(phy, mac, wifiStaNode);
|
|
|
|
mac.SetType("ns3::ApWifiMac",
|
|
"EnableBeaconJitter",
|
|
BooleanValue(false),
|
|
"Ssid",
|
|
SsidValue(ssid));
|
|
apDevice = wifi.Install(phy, mac, wifiApNode);
|
|
}
|
|
|
|
int64_t streamNumber = 150;
|
|
streamNumber += WifiHelper::AssignStreams(apDevice, streamNumber);
|
|
streamNumber += WifiHelper::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 =
|
|
VhtPhy::GetDataRate(mcs, channelWidth, NanoSeconds(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" << widthStr << " MHz\t\t"
|
|
<< (widthStr.size() > 3 ? "" : "\t") << (sgi ? "400 ns" : "800 ns")
|
|
<< "\t\t\t" << throughput << " Mbit/s" << std::endl;
|
|
|
|
// test first element
|
|
if (mcs == minMcs && channelWidth == 20 && !sgi)
|
|
{
|
|
if (throughput < minExpectedThroughput)
|
|
{
|
|
NS_LOG_ERROR("Obtained throughput " << throughput << " is not expected!");
|
|
exit(1);
|
|
}
|
|
}
|
|
// test last element
|
|
if (mcs == maxMcs && channelWidth == 160 && sgi)
|
|
{
|
|
if (maxExpectedThroughput > 0 && throughput > maxExpectedThroughput)
|
|
{
|
|
NS_LOG_ERROR("Obtained throughput " << throughput << " is not expected!");
|
|
exit(1);
|
|
}
|
|
}
|
|
// test previous throughput is smaller (for the same mcs)
|
|
if (throughput > previous)
|
|
{
|
|
previous = throughput;
|
|
}
|
|
else
|
|
{
|
|
NS_LOG_ERROR("Obtained throughput " << throughput << " is not expected!");
|
|
exit(1);
|
|
}
|
|
// test previous throughput is smaller (for the same channel width and GI)
|
|
if (throughput > prevThroughput[index])
|
|
{
|
|
prevThroughput[index] = throughput;
|
|
}
|
|
else
|
|
{
|
|
NS_LOG_ERROR("Obtained throughput " << throughput << " is not expected!");
|
|
exit(1);
|
|
}
|
|
index++;
|
|
}
|
|
channelWidth *= 2;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|