--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/test/ns3wifi/wifi-msdu-aggregator-test-suite.cc Mon May 10 12:44:23 2010 +0100
@@ -0,0 +1,204 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2010 Dean Armstrong
+ *
+ * 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
+ *
+ * Author: Dean Armstrong <deanarm@gmail.com>
+ */
+#include "ns3/test.h"
+#include "ns3/simulator.h"
+#include "ns3/log.h"
+
+#include "ns3/boolean.h"
+#include "ns3/string.h"
+#include "ns3/double.h"
+
+#include "ns3/ssid.h"
+#include "ns3/data-rate.h"
+#include "ns3/inet-socket-address.h"
+#include "ns3/packet-sink.h"
+
+#include "ns3/wifi-helper.h"
+#include "ns3/qos-wifi-mac-helper.h"
+#include "ns3/yans-wifi-helper.h"
+#include "ns3/mobility-helper.h"
+#include "ns3/internet-stack-helper.h"
+#include "ns3/ipv4-address-helper.h"
+#include "ns3/packet-sink-helper.h"
+#include "ns3/on-off-helper.h"
+
+NS_LOG_COMPONENT_DEFINE ("WifiMsduAggregatorThroughputTest");
+
+using namespace ns3;
+
+class WifiMsduAggregatorThroughputTest : public TestCase
+{
+public:
+ WifiMsduAggregatorThroughputTest ();
+ virtual bool DoRun (void);
+};
+
+WifiMsduAggregatorThroughputTest::WifiMsduAggregatorThroughputTest ()
+ : TestCase ("MsduAggregator throughput test")
+{
+}
+
+bool
+WifiMsduAggregatorThroughputTest::DoRun (void)
+{
+ WifiHelper wifi = WifiHelper::Default ();
+
+ QosWifiMacHelper wifiMac = QosWifiMacHelper::Default ();
+ YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();
+ YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();
+ wifiPhy.SetChannel (wifiChannel.Create ());
+
+ Ssid ssid = Ssid ("wifi-amsdu-throughput");
+ // It may seem a little farcical running an 802.11n aggregation
+ // scenario with 802.11b rates (transmit rate fixed to 1 Mbps, no
+ // less), but this approach tests the bit we need to without unduly
+ // increasing the complexity of the simulation.
+ std::string phyMode ("wifib-1mbs");
+ wifi.SetStandard (WIFI_PHY_STANDARD_80211b);
+ wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
+ "DataMode", StringValue (phyMode),
+ "ControlMode", StringValue (phyMode));
+
+ // Setup the AP, which will be the source of traffic for this test
+ // and thus has an aggregator on AC_BE.
+ NodeContainer ap;
+ ap.Create (1);
+ wifiMac.SetType ("ns3::QapWifiMac",
+ "Ssid", SsidValue (ssid),
+ "BeaconGeneration", BooleanValue (true),
+ "BeaconInterval", TimeValue (MilliSeconds (102.4)));
+ wifiMac.SetMsduAggregatorForAc (AC_BE, "ns3::MsduStandardAggregator",
+ "MaxAmsduSize", UintegerValue (4000));
+ NetDeviceContainer apDev = wifi.Install (wifiPhy, wifiMac, ap);
+
+ // Setup one STA, which will be the sink for traffic in this test.
+ NodeContainer sta;
+ sta.Create (1);
+ wifiMac.SetType ("ns3::QstaWifiMac",
+ "Ssid", SsidValue (ssid),
+ "ActiveProbing", BooleanValue (false));
+ NetDeviceContainer staDev = wifi.Install (wifiPhy, wifiMac, sta);
+
+ // Our devices will have fixed positions
+ MobilityHelper mobility;
+ mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
+ mobility.SetPositionAllocator ("ns3::GridPositionAllocator",
+ "MinX", DoubleValue (0.0),
+ "MinY", DoubleValue (0.0),
+ "DeltaX", DoubleValue (5.0),
+ "DeltaY", DoubleValue (10.0),
+ "GridWidth", UintegerValue (2),
+ "LayoutType", StringValue ("RowFirst"));
+ mobility.Install (sta);
+ mobility.Install (ap);
+
+ // Now we install internet stacks on our devices
+ InternetStackHelper stack;
+ stack.Install (ap);
+ stack.Install (sta);
+
+ Ipv4AddressHelper address;
+ address.SetBase ("192.168.0.0", "255.255.255.0");
+ Ipv4InterfaceContainer staNodeInterface, apNodeInterface;
+ staNodeInterface = address.Assign (staDev);
+ apNodeInterface = address.Assign (apDev);
+
+ // The applications for this test will see a unidirectional UDP
+ // stream from the AP to the STA. The following UDP port will be
+ // used (arbitrary choice).
+ uint16_t udpPort = 50000;
+
+ // The packet sink application is on the STA device, and is running
+ // right from the start. The traffic source will turn on at 1 second
+ // and then off at 9 seconds, so we turn the sink off at 9 seconds
+ // too in order to measure throughput in a fixed window.
+ PacketSinkHelper packetSink ("ns3::UdpSocketFactory",
+ InetSocketAddress(Ipv4Address::GetAny(),
+ udpPort));
+ ApplicationContainer sinkApp = packetSink.Install (sta.Get (0));
+ sinkApp.Start (Seconds (0));
+ sinkApp.Stop (Seconds (9.0));
+
+ // The packet source is an on-off application on the AP
+ // device. Given that we have fixed the transmit rate at 1 Mbps
+ // above, a 1 Mbps stream at the transport layer should be sufficent
+ // to determine whether aggregation is working or not.
+ //
+ // We configure this traffic stream to operate between 1 and 9 seconds.
+ OnOffHelper onoff ("ns3::UdpSocketFactory",
+ InetSocketAddress (staNodeInterface.GetAddress (0),
+ udpPort));
+ onoff.SetAttribute ("DataRate", DataRateValue(DataRate("1Mbps")));
+ onoff.SetAttribute ("PacketSize", UintegerValue(100));
+ onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1)));
+ onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0)));
+ ApplicationContainer sourceApp = onoff.Install (ap.Get (0));
+ sourceApp.Start (Seconds (1.0));
+ sourceApp.Stop (Seconds (9.0));
+
+ // Enable tracing at the AP
+ wifiPhy.EnablePcap ("wifi-amsdu-throughput", sta.Get (0)->GetId (), 0);
+
+ Simulator::Stop (Seconds (10.0));
+ Simulator::Run ();
+ Simulator::Destroy ();
+
+ // Now the simulation is complete we note the total number of octets
+ // receive at the packet sink so that we can shortly test that this
+ // is plausible.
+ uint32_t totalOctetsThrough =
+ DynamicCast<PacketSink>(sinkApp.Get (0))->GetTotalRx ();
+
+ // Check that throughput was acceptable. This threshold is set based
+ // on inspection of a trace where things are working. Basically, we
+ // there get 26 UDP packets (of size 100, as specified above)
+ // aggregated per A-MSDU, for which the complete frame exchange
+ // (including RTS/CTS and plus medium access) takes around 32
+ // ms. Over the eight seconds of the test this means we expect about
+ // 650 kilobytes, so a pass threshold of 600000 seems to provide a
+ // fair amount of margin to account for reduced utilisation around
+ // stream startup, and contention around AP beacon transmission.
+ //
+ // If aggregation is turned off, then we get about 350 kilobytes in
+ // the same test, so we'll definitely catch the major failures.
+ NS_TEST_ASSERT_MSG_GT(totalOctetsThrough, 600000,
+ "A-MSDU test fails for low throughput of "
+ << totalOctetsThrough << " octets");
+
+ return false;
+}
+
+
+// For now the MSDU Aggregator Test Suite contains only the one test
+// that is defined in this file, so it's class definition and
+// instantiation can live here.
+class WifiMsduAggregatorTestSuite : public TestSuite
+{
+public:
+ WifiMsduAggregatorTestSuite ();
+};
+
+WifiMsduAggregatorTestSuite::WifiMsduAggregatorTestSuite ()
+ : TestSuite ("ns3-wifi-msdu-aggregator", SYSTEM)
+{
+ AddTestCase (new WifiMsduAggregatorThroughputTest);
+}
+
+WifiMsduAggregatorTestSuite wifiMsduAggregatorTestSuite;