# 概要　ns3を用いて、Wi-Fiのスループットを測定したいのですがコンパイルをするとエラーが起きてしまいます。どのように修正すればいいのかを教えていただきたいです。 __UdpClientHelper__のところでエラーが起きてるのかなというのは予想しているのですが、なぜエラー原因と解決策がわからないです。 ##　エラー文 ```ここに言語を入力 hogehoge:ns-3-dev$ ./waf --run 'scratch/teratail' Waf: Entering directory `/Users/hogehoge/Desktop/ns-allinone-3.30.1/ns-3-dev/build' [2800/2849] Compiling scratch/teratail.cc [2809/2849] Linking build/scratch/teratail Waf: Leaving directory `/Users/hogehoge/Desktop/ns-allinone-3.30.1/ns-3-dev/build' Build commands will be stored in build/compile_commands.json 'build' finished successfully (3.256s) assert failed. cond="duration.IsPositive ()", msg="Please provide test case to maintainers if this assert is hit.", file=../src/wifi/model/mac-low.cc, line=2146 libc++abi.dylib: terminating Command ['/Users/hogehoge/Desktop/ns-allinone-3.30.1/ns-3-dev/build/scratch/teratail'] terminated with signal SIGIOT. Run it under a debugger to get more information (./waf --run --command-template="gdb --args %s "). ``` ##　ネットワークトポロジー図 ![イメージ説明](389b2c9988e4e5d5614fd4095de88131.png) ## プログラム説明　50m×50mのエリアに10個の端末をランダムで配置し、中央にAPを設置する。APはRemoteHostと接続されており、端末はRemoteHostと通信を行う。その際のスループットを表示する。 ## プログラムコード ```C++ #include "ns3/core-module.h" #include "ns3/point-to-point-module.h" #include "ns3/command-line.h" #include "ns3/config.h" #include "ns3/uinteger.h" #include "ns3/boolean.h" #include "ns3/double.h" #include "ns3/string.h" #include "ns3/yans-wifi-helper.h" #include "ns3/ssid.h" #include "ns3/mobility-helper.h" #include "ns3/mobility-module.h" #include "ns3/internet-stack-helper.h" #include "ns3/ipv4-address-helper.h" #include "ns3/udp-client-server-helper.h" #include "ns3/packet-sink-helper.h" #include "ns3/on-off-helper.h" #include "ns3/ipv4-global-routing-helper.h" #include "ns3/packet-sink.h" #include "ns3/yans-wifi-channel.h" #include using namespace ns3; int main (int argc, char *argv[]) { uint32_t nStaNodes = 10; double simulationTime = 5; CommandLine cmd; cmd.AddValue ("nStaNodes", "Number of \"extra\" Station nodes/devices", nStaNodes); cmd.AddValue ("simulationTime", "Simulation time per step (in seconds)", simulationTime); cmd.Parse (argc,argv); std::string phyRate = "HtMcs15"; /* Physical layer bitrate. */ uint32_t payloadSize = 1472; //bytes NodeContainer p2pNodes; p2pNodes.Create (2); NodeContainer remoteNode; remoteNode.Add (p2pNodes.Get (1)); PointToPointHelper pointToPoint; pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("130Mbps")); pointToPoint.SetChannelAttribute ("Delay", StringValue ("1ms")); NetDeviceContainer p2pDevices; p2pDevices = pointToPoint.Install (p2pNodes); NodeContainer wifiStaNodes; wifiStaNodes.Create (nStaNodes); NodeContainer wifiApNode = p2pNodes.Get (0); YansWifiChannelHelper channel = YansWifiChannelHelper::Default (); YansWifiPhyHelper phy = YansWifiPhyHelper::Default (); phy.SetChannel (channel.Create ()); WifiHelper wifi; wifi.SetStandard (WIFI_PHY_STANDARD_80211n_2_4GHZ); Config::SetDefault ("ns3::LogDistancePropagationLossModel::ReferenceLoss", DoubleValue (40.046)); StringValue ctrlRate; ctrlRate = StringValue ("ErpOfdmRate24Mbps"); wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager", "DataMode", StringValue (phyRate), "ControlMode", ctrlRate); WifiMacHelper mac; Ssid ssid = Ssid ("ns3-80211n"); mac.SetType ("ns3::StaWifiMac", "Ssid", SsidValue (ssid)); NetDeviceContainer staDevices; staDevices = wifi.Install (phy, mac, wifiStaNodes); mac.SetType ("ns3::ApWifiMac", "Ssid", SsidValue (ssid)); NetDeviceContainer apDevice; apDevice = wifi.Install (phy, mac, wifiApNode); // mobility. MobilityHelper mobility; Ptr positionAlloc = CreateObject (); positionAlloc->Add (Vector (25.0, 25.0, 0.0)); double xPositionArray[nStaNodes]; double yPositionArray[nStaNodes]; for (uint32_t nodeCount = 0; nodeCount < nStaNodes; nodeCount++) //distance { xPositionArray[nodeCount] = rand() % 50; yPositionArray[nodeCount] = rand() % 50; positionAlloc->Add (Vector (xPositionArray[nodeCount], yPositionArray[nodeCount], 0.0)); } mobility.SetPositionAllocator (positionAlloc); mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel"); mobility.Install (wifiApNode); mobility.Install (wifiStaNodes); /* Internet stack*/ InternetStackHelper stack; stack.Install (remoteNode); stack.Install (wifiApNode); stack.Install (wifiStaNodes); Ipv4AddressHelper address; address.SetBase ("10.1.1.0", "255.255.255.0"); Ipv4InterfaceContainer p2pInterfaces; p2pInterfaces = address.Assign (p2pDevices); address.SetBase ("10.1.2.0", "255.255.255.0"); Ipv4InterfaceContainer staNodesInterface; Ipv4InterfaceContainer apNodeInterface; staNodesInterface = address.Assign (staDevices); apNodeInterface = address.Assign (apDevice); ApplicationContainer serverApp; //UDP flow uint16_t port = 9; UdpServerHelper server (port); serverApp = server.Install (wifiStaNodes); serverApp.Start (Seconds (0.0)); serverApp.Stop (Seconds (simulationTime + 1)); ApplicationContainer clientApp; for (int i = 0; i < nStaNodes; i++) { UdpClientHelper client (staNodesInterface.GetAddress (i), port); client.SetAttribute ("MaxPackets", UintegerValue (4294967295u)); client.SetAttribute ("Interval", TimeValue (Time ("0.00001"))); //packets/s client.SetAttribute ("PacketSize", UintegerValue (payloadSize)); if (i == 0) { clientApp = client.Install (wifiApNode.Get (0)); } else { clientApp.Add(client.Install (wifiApNode.Get (0))); } } clientApp.Start (Seconds (1.0)); clientApp.Stop (Seconds (simulationTime + 1)); Ipv4GlobalRoutingHelper::PopulateRoutingTables (); Simulator::Stop (Seconds (simulationTime + 1)); Simulator::Run (); double throughput = 0; //UDP uint64_t totalPacketsThrough = DynamicCast (serverApp.Get (0))->GetReceived (); throughput = totalPacketsThrough * payloadSize * 8 / (simulationTime * 1000000.0); //Mbit/s std::cout << throughput << " Mbit/s" << std::endl; Simulator::Destroy (); return 0; } ```

	@@ -1 +1 @@
1	- ns3で1つのAPに複数のn~~ode~~を接続してスループットを測定したい
1	+ ns3で1つのWi-Fi (AP)に複数の端末 (station) を接続してスループットを測定したい

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