wifi: Add test for reception of unsupported modulation
This commit is contained in:
Davide Magrin
committed by
Stefano Avallone
Stefano Avallone
parent
a559501068
commit
269b0b9d82
@@ -19,11 +19,20 @@
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*/
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#include "ns3/log.h"
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#include "ns3/mobility-helper.h"
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#include "ns3/multi-model-spectrum-channel.h"
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#include "ns3/config.h"
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#include "ns3/ap-wifi-mac.h"
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#include "ns3/packet-socket-address.h"
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#include "ns3/packet-socket-client.h"
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#include "ns3/packet-socket-helper.h"
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#include "ns3/packet-socket-server.h"
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#include "ns3/test.h"
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#include "ns3/double.h"
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#include "ns3/pointer.h"
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#include "ns3/rng-seed-manager.h"
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#include "ns3/spectrum-wifi-helper.h"
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#include "ns3/wifi-net-device.h"
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#include "ns3/wifi-spectrum-value-helper.h"
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#include "ns3/spectrum-wifi-phy.h"
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#include "ns3/nist-error-rate-model.h"
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@@ -2341,6 +2350,206 @@ TestAmpduReception::DoRun (void)
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Simulator::Destroy ();
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}
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/**
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* \ingroup wifi-test
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* \ingroup tests
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*
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* \brief Unsupported Modulation Reception Test
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* This test creates a mixed network, in which an HE STA and a VHT
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* STA are associated to an HE AP and send uplink traffic. In the
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* simulated deployment the VHT STA's backoff will expire while the
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* HE STA is sending a packet, and the VHT STA will access the
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* channel anyway. This happens because the HE STA is using an HeMcs
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* that the VHT STA is not able to demodulate: the VHT STA will
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* correctly stop listening to the HE packet, but it will not update
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* its InterferenceHelper with the HE packet. Later on, this leads to
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* the STA wrongly assuming the medium is available when its back-off
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* expires in the middle of the HE packet. We detect that this is
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* happening by looking at the reason why the AP is failing to decode
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* the preamble from the VHT STA's transmission: if the reason is
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* that it's in RX already, the test fails. The test is based on
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* wifi-txop-test.cc.
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*/
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class TestUnsupportedModulationReception : public TestCase
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{
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public:
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/**
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* Constructor
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*/
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TestUnsupportedModulationReception ();
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virtual ~TestUnsupportedModulationReception ();
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/**
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* Callback invoked when PHY drops an incoming packet
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* \param context the context
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* \param packet the packet that was dropped
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* \param reason the reason the packet was dropped
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*/
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void Dropped (std::string context, Ptr<const Packet> packet, WifiPhyRxfailureReason reason);
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/**
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* Check correctness of transmitted frames
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*/
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void CheckResults (void);
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private:
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void DoRun (void) override;
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uint16_t m_dropped; ///< number of packets dropped by the AP because it was already receiving
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};
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TestUnsupportedModulationReception::TestUnsupportedModulationReception ()
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: TestCase ("Check correct behavior when a STA is receiving a transmission using an unsupported modulation"),
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m_dropped (0)
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{
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}
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TestUnsupportedModulationReception::~TestUnsupportedModulationReception ()
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{
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}
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void
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TestUnsupportedModulationReception::Dropped (std::string context, Ptr<const Packet> packet,
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WifiPhyRxfailureReason reason)
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{
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// Print if the test is executed through test-runner
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if (reason == RXING)
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{
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std::cout << "Dropped a packet because already receiving" << std::endl;
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m_dropped++;
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}
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}
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void
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TestUnsupportedModulationReception::DoRun (void)
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{
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uint16_t m_nStations = 2; ///< number of stations
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NetDeviceContainer m_staDevices; ///< container for stations' NetDevices
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NetDeviceContainer m_apDevices; ///< container for AP's NetDevice
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// RngSeedManager::SetSeed (1);
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// RngSeedManager::SetRun (40);
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int64_t streamNumber = 100;
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NodeContainer wifiApNode;
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wifiApNode.Create (1);
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NodeContainer wifiStaNodes;
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wifiStaNodes.Create (m_nStations);
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Ptr<MultiModelSpectrumChannel> spectrumChannel = CreateObject<MultiModelSpectrumChannel> ();
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Ptr<FriisPropagationLossModel> lossModel = CreateObject<FriisPropagationLossModel> ();
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spectrumChannel->AddPropagationLossModel (lossModel);
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Ptr<ConstantSpeedPropagationDelayModel> delayModel =
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CreateObject<ConstantSpeedPropagationDelayModel> ();
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spectrumChannel->SetPropagationDelayModel (delayModel);
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SpectrumWifiPhyHelper phy;
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phy.SetChannel (spectrumChannel);
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Config::SetDefault ("ns3::WifiRemoteStationManager::RtsCtsThreshold", UintegerValue (65535));
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WifiHelper wifi;
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wifi.SetRemoteStationManager ("ns3::IdealWifiManager");
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WifiMacHelper mac;
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mac.SetType ("ns3::StaWifiMac", "QosSupported", BooleanValue (true), "Ssid",
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SsidValue (Ssid ("non-existent-ssid")));
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wifi.SetStandard (WIFI_STANDARD_80211ax_5GHZ);
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m_staDevices.Add (wifi.Install (phy, mac, wifiStaNodes.Get (0)));
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wifi.SetStandard (WIFI_STANDARD_80211ac);
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m_staDevices.Add (wifi.Install (phy, mac, wifiStaNodes.Get (1)));
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wifi.SetStandard (WIFI_STANDARD_80211ax_5GHZ);
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mac.SetType ("ns3::ApWifiMac", "QosSupported", BooleanValue (true), "Ssid",
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SsidValue (Ssid ("wifi-backoff-ssid")), "BeaconInterval",
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TimeValue (MicroSeconds (102400)), "EnableBeaconJitter", BooleanValue (false));
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m_apDevices = wifi.Install (phy, mac, wifiApNode);
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// schedule association requests at different times
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Time init = MilliSeconds (100);
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Ptr<WifiNetDevice> dev;
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for (uint16_t i = 0; i < m_nStations; i++)
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{
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dev = DynamicCast<WifiNetDevice> (m_staDevices.Get (i));
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Simulator::Schedule (init + i * MicroSeconds (102400), &WifiMac::SetSsid, dev->GetMac (),
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Ssid ("wifi-backoff-ssid"));
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}
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// Assign fixed streams to random variables in use
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wifi.AssignStreams (m_apDevices, streamNumber);
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MobilityHelper mobility;
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Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();
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positionAlloc->Add (Vector (0.0, 0.0, 0.0));
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positionAlloc->Add (Vector (1.0, 0.0, 0.0));
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positionAlloc->Add (Vector (0.0, 1.0, 0.0));
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positionAlloc->Add (Vector (-1.0, 0.0, 0.0));
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mobility.SetPositionAllocator (positionAlloc);
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mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
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mobility.Install (wifiApNode);
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mobility.Install (wifiStaNodes);
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// set the TXOP limit on BE AC
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dev = DynamicCast<WifiNetDevice> (m_apDevices.Get (0));
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PointerValue ptr;
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dev->GetMac ()->GetAttribute ("BE_Txop", ptr);
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PacketSocketHelper packetSocket;
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packetSocket.Install (wifiApNode);
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packetSocket.Install (wifiStaNodes);
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// UL Traffic
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for (uint16_t i = 0; i < m_nStations; i++)
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{
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PacketSocketAddress socket;
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socket.SetSingleDevice (m_staDevices.Get (0)->GetIfIndex ());
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socket.SetPhysicalAddress (m_apDevices.Get (0)->GetAddress ());
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socket.SetProtocol (1);
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Ptr<PacketSocketClient> client = CreateObject<PacketSocketClient> ();
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client->SetAttribute ("PacketSize", UintegerValue (1500));
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client->SetAttribute ("MaxPackets", UintegerValue (200));
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client->SetAttribute ("Interval", TimeValue (MicroSeconds (0)));
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client->SetRemote (socket);
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wifiStaNodes.Get (i)->AddApplication (client);
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client->SetStartTime (MicroSeconds (400000));
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client->SetStopTime (Seconds (1.0));
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Ptr<PacketSocketClient> legacyStaClient = CreateObject<PacketSocketClient> ();
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legacyStaClient->SetAttribute ("PacketSize", UintegerValue (1500));
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legacyStaClient->SetAttribute ("MaxPackets", UintegerValue (200));
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legacyStaClient->SetAttribute ("Interval", TimeValue (MicroSeconds (0)));
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legacyStaClient->SetRemote (socket);
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wifiStaNodes.Get (i)->AddApplication (legacyStaClient);
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legacyStaClient->SetStartTime (MicroSeconds (400000));
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legacyStaClient->SetStopTime (Seconds (1.0));
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Ptr<PacketSocketServer> server = CreateObject<PacketSocketServer> ();
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server->SetLocal (socket);
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wifiApNode.Get (0)->AddApplication (server);
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server->SetStartTime (Seconds (0.0));
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server->SetStopTime (Seconds (1.0));
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}
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// Trace dropped packets
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Config::Connect ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/PhyRxDrop",
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MakeCallback (&TestUnsupportedModulationReception::Dropped, this));
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Simulator::Stop (Seconds (1));
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Simulator::Run ();
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CheckResults ();
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Simulator::Destroy ();
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}
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void
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TestUnsupportedModulationReception::CheckResults (void)
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{
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NS_TEST_EXPECT_MSG_EQ (m_dropped, 0, "Dropped some packets unexpectedly");
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}
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/**
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* \ingroup wifi-test
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* \ingroup tests
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@@ -2361,6 +2570,7 @@ WifiPhyReceptionTestSuite::WifiPhyReceptionTestSuite ()
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AddTestCase (new TestSimpleFrameCaptureModel, TestCase::QUICK);
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AddTestCase (new TestPhyHeadersReception, TestCase::QUICK);
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AddTestCase (new TestAmpduReception, TestCase::QUICK);
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// AddTestCase (new TestUnsupportedModulationReception (), TestCase::QUICK);
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}
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static WifiPhyReceptionTestSuite wifiPhyReceptionTestSuite; ///< the test suite
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