A Discrete-Event Network Simulator
API
wifi-txop-aggregation.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2016 S├ębastien Deronne
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
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11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17  *
18  * Author: S├ębastien Deronne <sebastien.deronne@gmail.com>
19  */
20 
21 #include "ns3/command-line.h"
22 #include "ns3/config.h"
23 #include "ns3/uinteger.h"
24 #include "ns3/boolean.h"
25 #include "ns3/string.h"
26 #include "ns3/pointer.h"
27 #include "ns3/log.h"
28 #include "ns3/yans-wifi-helper.h"
29 #include "ns3/ssid.h"
30 #include "ns3/mobility-helper.h"
31 #include "ns3/internet-stack-helper.h"
32 #include "ns3/ipv4-address-helper.h"
33 #include "ns3/udp-client-server-helper.h"
34 #include "ns3/packet-sink-helper.h"
35 #include "ns3/yans-wifi-channel.h"
36 #include "ns3/wifi-net-device.h"
37 #include "ns3/wifi-mac.h"
38 #include "ns3/qos-txop.h"
39 
40 // This is an example that illustrates how 802.11n aggregation is configured.
41 // It defines 4 independent Wi-Fi networks (working on different channels).
42 // Each network contains one access point and one station. Each station
43 // continuously transmits data packets to its respective AP.
44 //
45 // Network topology (numbers in parentheses are channel numbers):
46 //
47 // Network A (36) Network B (40) Network C (44) Network D (48)
48 // * * * * * * * *
49 // | | | | | | | |
50 // AP A STA A AP B STA B AP C STA C AP D STA D
51 //
52 // The aggregation parameters are configured differently on the 4 stations:
53 // - station A uses default aggregation parameter values (A-MSDU disabled, A-MPDU enabled with maximum size of 65 kB);
54 // - station B doesn't use aggregation (both A-MPDU and A-MSDU are disabled);
55 // - station C enables A-MSDU (with maximum size of 8 kB) but disables A-MPDU;
56 // - station D uses two-level aggregation (A-MPDU with maximum size of 32 kB and A-MSDU with maximum size of 4 kB).
57 //
58 // The user can select the distance between the stations and the APs, can enable/disable the RTS/CTS mechanism
59 // and can modify the duration of a TXOP.
60 // Example: ./waf --run "wifi-txop-aggregation --distance=10 --enableRts=0 --simulationTime=20"
61 //
62 // The output prints the throughput and the maximum TXOP duration measured for the 4 cases/networks
63 // described above. When default aggregation parameters are enabled, the
64 // maximum A-MPDU size is 65 kB and the throughput is maximal. When aggregation is disabled, the throughput is about the half of the physical
65 // bitrate. When only A-MSDU is enabled, the throughput is increased but is not maximal, since the maximum A-MSDU size is limited to 7935 bytes
66 // (whereas the maximum A-MPDU size is limited to 65535 bytes). When A-MSDU and A-MPDU are both enabled (= two-level aggregation),
67 // the throughput is slightly smaller than the first scenario since we set a smaller maximum A-MPDU size.
68 //
69 // When the distance is increased, the frame error rate gets higher, and the output shows how it affects the throughput for the 4 networks.
70 // Even through A-MSDU has less overheads than A-MPDU, A-MSDU is less robust against transmission errors than A-MPDU. When the distance is
71 // augmented, the throughput for the third scenario is more affected than the throughput obtained in other networks.
72 
73 using namespace ns3;
74 
75 NS_LOG_COMPONENT_DEFINE ("TxopMpduAggregation");
76 
80 struct TxopDurationTracer
81 {
82  void Trace (Time startTime, Time duration);
83  Time m_max {Seconds (0)};
84 };
85 
86 void
88 {
89  if (duration > m_max)
90  {
91  m_max = duration;
92  }
93 }
94 
95 int main (int argc, char *argv[])
96 {
97  uint32_t payloadSize = 1472; //bytes
98  double simulationTime = 10; //seconds
99  double txopLimit = 3520; //microseconds
100  double distance = 5; //meters
101  bool enableRts = 0;
102  bool enablePcap = 0;
103  bool verifyResults = 0; //used for regression
104 
105  CommandLine cmd (__FILE__);
106  cmd.AddValue ("payloadSize", "Payload size in bytes", payloadSize);
107  cmd.AddValue ("enableRts", "Enable or disable RTS/CTS", enableRts);
108  cmd.AddValue ("txopLimit", "TXOP duration in microseconds", txopLimit);
109  cmd.AddValue ("simulationTime", "Simulation time in seconds", simulationTime);
110  cmd.AddValue ("distance", "Distance in meters between the station and the access point", distance);
111  cmd.AddValue ("enablePcap", "Enable/disable pcap file generation", enablePcap);
112  cmd.AddValue ("verifyResults", "Enable/disable results verification at the end of the simulation", verifyResults);
113  cmd.Parse (argc, argv);
114 
115  Config::SetDefault ("ns3::WifiRemoteStationManager::RtsCtsThreshold", enableRts ? StringValue ("0") : StringValue ("999999"));
116 
118  wifiStaNodes.Create (4);
119  NodeContainer wifiApNodes;
120  wifiApNodes.Create (4);
121 
124  phy.SetPcapDataLinkType (WifiPhyHelper::DLT_IEEE802_11_RADIO);
125  phy.SetChannel (channel.Create ());
126 
128  wifi.SetStandard (WIFI_STANDARD_80211n_5GHZ);
129  wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager", "DataMode", StringValue ("HtMcs7"), "ControlMode", StringValue ("HtMcs0"));
131 
132  NetDeviceContainer staDeviceA, staDeviceB, staDeviceC, staDeviceD, apDeviceA, apDeviceB, apDeviceC, apDeviceD;
133  Ssid ssid;
134 
135  // Network A
136  ssid = Ssid ("network-A");
137  phy.Set ("ChannelNumber", UintegerValue (36));
138  mac.SetType ("ns3::StaWifiMac",
139  "Ssid", SsidValue (ssid));
140  staDeviceA = wifi.Install (phy, mac, wifiStaNodes.Get (0));
141 
142  mac.SetType ("ns3::ApWifiMac",
143  "Ssid", SsidValue (ssid),
144  "EnableBeaconJitter", BooleanValue (false));
145  apDeviceA = wifi.Install (phy, mac, wifiApNodes.Get (0));
146 
147  // Modify EDCA configuration (TXOP limit) for AC_BE
148  Ptr<NetDevice> dev = wifiApNodes.Get (0)->GetDevice (0);
149  Ptr<WifiNetDevice> wifi_dev = DynamicCast<WifiNetDevice> (dev);
150  PointerValue ptr;
151  Ptr<QosTxop> edca;
152  wifi_dev->GetMac ()->GetAttribute ("BE_Txop", ptr);
153  edca = ptr.Get<QosTxop> ();
154  edca->SetTxopLimit (MicroSeconds (txopLimit));
155 
156  // Trace TXOP duration for BE on AP A
157  TxopDurationTracer netA;
159 
160  // Network B
161  ssid = Ssid ("network-B");
162  phy.Set ("ChannelNumber", UintegerValue (40));
163  mac.SetType ("ns3::StaWifiMac",
164  "Ssid", SsidValue (ssid));
165 
166  staDeviceB = wifi.Install (phy, mac, wifiStaNodes.Get (1));
167 
168  // Disable A-MPDU
169  dev = wifiStaNodes.Get (1)->GetDevice (0);
170  wifi_dev = DynamicCast<WifiNetDevice> (dev);
171  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmpduSize", UintegerValue (0));
172 
173  mac.SetType ("ns3::ApWifiMac",
174  "Ssid", SsidValue (ssid),
175  "EnableBeaconJitter", BooleanValue (false));
176  apDeviceB = wifi.Install (phy, mac, wifiApNodes.Get (1));
177 
178  // Disable A-MPDU
179  dev = wifiApNodes.Get (1)->GetDevice (0);
180  wifi_dev = DynamicCast<WifiNetDevice> (dev);
181  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmpduSize", UintegerValue (0));
182 
183  // Modify EDCA configuration (TXOP limit) for AC_BE
184  wifi_dev->GetMac ()->GetAttribute ("BE_Txop", ptr);
185  edca = ptr.Get<QosTxop> ();
186  edca->SetTxopLimit (MicroSeconds (txopLimit));
187 
188  // Trace TXOP duration for BE on AP B
189  TxopDurationTracer netB;
191 
192  // Network C
193  ssid = Ssid ("network-C");
194  phy.Set ("ChannelNumber", UintegerValue (44));
195  mac.SetType ("ns3::StaWifiMac",
196  "Ssid", SsidValue (ssid));
197 
198  staDeviceC = wifi.Install (phy, mac, wifiStaNodes.Get (2));
199 
200  // Disable A-MPDU and enable A-MSDU with the highest maximum size allowed by the standard (7935 bytes)
201  dev = wifiStaNodes.Get (2)->GetDevice (0);
202  wifi_dev = DynamicCast<WifiNetDevice> (dev);
203  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmpduSize", UintegerValue (0));
204  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmsduSize", UintegerValue (7935));
205 
206  mac.SetType ("ns3::ApWifiMac",
207  "Ssid", SsidValue (ssid),
208  "EnableBeaconJitter", BooleanValue (false));
209  apDeviceC = wifi.Install (phy, mac, wifiApNodes.Get (2));
210 
211  // Disable A-MPDU and enable A-MSDU with the highest maximum size allowed by the standard (7935 bytes)
212  dev = wifiApNodes.Get (2)->GetDevice (0);
213  wifi_dev = DynamicCast<WifiNetDevice> (dev);
214  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmpduSize", UintegerValue (0));
215  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmsduSize", UintegerValue (7935));
216 
217  // Modify EDCA configuration (TXOP limit) for AC_BE
218  wifi_dev->GetMac ()->GetAttribute ("BE_Txop", ptr);
219  edca = ptr.Get<QosTxop> ();
220  edca->SetTxopLimit (MicroSeconds (txopLimit));
221 
222  // Trace TXOP duration for BE on AP C
223  TxopDurationTracer netC;
225 
226  // Network D
227  ssid = Ssid ("network-D");
228  phy.Set ("ChannelNumber", UintegerValue (48));
229  mac.SetType ("ns3::StaWifiMac",
230  "Ssid", SsidValue (ssid));
231 
232  staDeviceD = wifi.Install (phy, mac, wifiStaNodes.Get (3));
233 
234  // Enable A-MPDU with a smaller size than the default one and
235  // enable A-MSDU with the smallest maximum size allowed by the standard (3839 bytes)
236  dev = wifiStaNodes.Get (3)->GetDevice (0);
237  wifi_dev = DynamicCast<WifiNetDevice> (dev);
238  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmpduSize", UintegerValue (32768));
239  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmsduSize", UintegerValue (3839));
240 
241  mac.SetType ("ns3::ApWifiMac",
242  "Ssid", SsidValue (ssid),
243  "EnableBeaconJitter", BooleanValue (false));
244  apDeviceD = wifi.Install (phy, mac, wifiApNodes.Get (3));
245 
246  // Enable A-MPDU with a smaller size than the default one and
247  // enable A-MSDU with the smallest maximum size allowed by the standard (3839 bytes)
248  dev = wifiApNodes.Get (3)->GetDevice (0);
249  wifi_dev = DynamicCast<WifiNetDevice> (dev);
250  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmpduSize", UintegerValue (32768));
251  wifi_dev->GetMac ()->SetAttribute ("BE_MaxAmsduSize", UintegerValue (3839));
252 
253  // Modify EDCA configuration (TXOP limit) for AC_BE
254  wifi_dev->GetMac ()->GetAttribute ("BE_Txop", ptr);
255  edca = ptr.Get<QosTxop> ();
256  edca->SetTxopLimit (MicroSeconds (txopLimit));
257 
258  // Trace TXOP duration for BE on AP D
259  TxopDurationTracer netD;
261 
262  // Setting mobility model
264  Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();
265  mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
266 
267  // Set position for APs
268  positionAlloc->Add (Vector (0.0, 0.0, 0.0));
269  positionAlloc->Add (Vector (10.0, 0.0, 0.0));
270  positionAlloc->Add (Vector (20.0, 0.0, 0.0));
271  positionAlloc->Add (Vector (30.0, 0.0, 0.0));
272  // Set position for STAs
273  positionAlloc->Add (Vector (distance, 0.0, 0.0));
274  positionAlloc->Add (Vector (10 + distance, 0.0, 0.0));
275  positionAlloc->Add (Vector (20 + distance, 0.0, 0.0));
276  positionAlloc->Add (Vector (30 + distance, 0.0, 0.0));
277 
278  mobility.SetPositionAllocator (positionAlloc);
279  mobility.Install (wifiApNodes);
280  mobility.Install (wifiStaNodes);
281 
282  // Internet stack
284  stack.Install (wifiApNodes);
285  stack.Install (wifiStaNodes);
286 
288  address.SetBase ("192.168.1.0", "255.255.255.0");
289  Ipv4InterfaceContainer StaInterfaceA;
290  StaInterfaceA = address.Assign (staDeviceA);
291  Ipv4InterfaceContainer ApInterfaceA;
292  ApInterfaceA = address.Assign (apDeviceA);
293 
294  address.SetBase ("192.168.2.0", "255.255.255.0");
295  Ipv4InterfaceContainer StaInterfaceB;
296  StaInterfaceB = address.Assign (staDeviceB);
297  Ipv4InterfaceContainer ApInterfaceB;
298  ApInterfaceB = address.Assign (apDeviceB);
299 
300  address.SetBase ("192.168.3.0", "255.255.255.0");
301  Ipv4InterfaceContainer StaInterfaceC;
302  StaInterfaceC = address.Assign (staDeviceC);
303  Ipv4InterfaceContainer ApInterfaceC;
304  ApInterfaceC = address.Assign (apDeviceC);
305 
306  address.SetBase ("192.168.4.0", "255.255.255.0");
307  Ipv4InterfaceContainer StaInterfaceD;
308  StaInterfaceD = address.Assign (staDeviceD);
309  Ipv4InterfaceContainer ApInterfaceD;
310  ApInterfaceD = address.Assign (apDeviceD);
311 
312  // Setting applications
313  uint16_t port = 9;
314  UdpServerHelper serverA (port);
315  ApplicationContainer serverAppA = serverA.Install (wifiStaNodes.Get (0));
316  serverAppA.Start (Seconds (0.0));
317  serverAppA.Stop (Seconds (simulationTime + 1));
318 
319  UdpClientHelper clientA (StaInterfaceA.GetAddress (0), port);
320  clientA.SetAttribute ("MaxPackets", UintegerValue (4294967295u));
321  clientA.SetAttribute ("Interval", TimeValue (Time ("0.0001"))); //packets/s
322  clientA.SetAttribute ("PacketSize", UintegerValue (payloadSize));
323 
324  ApplicationContainer clientAppA = clientA.Install (wifiApNodes.Get (0));
325  clientAppA.Start (Seconds (1.0));
326  clientAppA.Stop (Seconds (simulationTime + 1));
327 
328  UdpServerHelper serverB (port);
329  ApplicationContainer serverAppB = serverB.Install (wifiStaNodes.Get (1));
330  serverAppB.Start (Seconds (0.0));
331  serverAppB.Stop (Seconds (simulationTime + 1));
332 
333  UdpClientHelper clientB (StaInterfaceB.GetAddress (0), port);
334  clientB.SetAttribute ("MaxPackets", UintegerValue (4294967295u));
335  clientB.SetAttribute ("Interval", TimeValue (Time ("0.0001"))); //packets/s
336  clientB.SetAttribute ("PacketSize", UintegerValue (payloadSize));
337 
338  ApplicationContainer clientAppB = clientB.Install (wifiApNodes.Get (1));
339  clientAppB.Start (Seconds (1.0));
340  clientAppB.Stop (Seconds (simulationTime + 1));
341 
342  UdpServerHelper serverC (port);
343  ApplicationContainer serverAppC = serverC.Install (wifiStaNodes.Get (2));
344  serverAppC.Start (Seconds (0.0));
345  serverAppC.Stop (Seconds (simulationTime + 1));
346 
347  UdpClientHelper clientC (StaInterfaceC.GetAddress (0), port);
348  clientC.SetAttribute ("MaxPackets", UintegerValue (4294967295u));
349  clientC.SetAttribute ("Interval", TimeValue (Time ("0.0001"))); //packets/s
350  clientC.SetAttribute ("PacketSize", UintegerValue (payloadSize));
351 
352  ApplicationContainer clientAppC = clientC.Install (wifiApNodes.Get (2));
353  clientAppC.Start (Seconds (1.0));
354  clientAppC.Stop (Seconds (simulationTime + 1));
355 
356  UdpServerHelper serverD (port);
357  ApplicationContainer serverAppD = serverD.Install (wifiStaNodes.Get (3));
358  serverAppD.Start (Seconds (0.0));
359  serverAppD.Stop (Seconds (simulationTime + 1));
360 
361  UdpClientHelper clientD (StaInterfaceD.GetAddress (0), port);
362  clientD.SetAttribute ("MaxPackets", UintegerValue (4294967295u));
363  clientD.SetAttribute ("Interval", TimeValue (Time ("0.0001"))); //packets/s
364  clientD.SetAttribute ("PacketSize", UintegerValue (payloadSize));
365 
366  ApplicationContainer clientAppD = clientD.Install (wifiApNodes.Get (3));
367  clientAppD.Start (Seconds (1.0));
368  clientAppD.Stop (Seconds (simulationTime + 1));
369 
370  if (enablePcap)
371  {
372  phy.EnablePcap ("AP_A", apDeviceA.Get (0));
373  phy.EnablePcap ("STA_A", staDeviceA.Get (0));
374  phy.EnablePcap ("AP_B", apDeviceB.Get (0));
375  phy.EnablePcap ("STA_B", staDeviceB.Get (0));
376  phy.EnablePcap ("AP_C", apDeviceC.Get (0));
377  phy.EnablePcap ("STA_C", staDeviceC.Get (0));
378  phy.EnablePcap ("AP_D", apDeviceD.Get (0));
379  phy.EnablePcap ("STA_D", staDeviceD.Get (0));
380  }
381 
382  Simulator::Stop (Seconds (simulationTime + 1));
383  Simulator::Run ();
384 
385  // Show results
386  uint64_t totalPacketsThroughA = DynamicCast<UdpServer> (serverAppA.Get (0))->GetReceived ();
387  uint64_t totalPacketsThroughB = DynamicCast<UdpServer> (serverAppB.Get (0))->GetReceived ();
388  uint64_t totalPacketsThroughC = DynamicCast<UdpServer> (serverAppC.Get (0))->GetReceived ();
389  uint64_t totalPacketsThroughD = DynamicCast<UdpServer> (serverAppD.Get (0))->GetReceived ();
390 
392 
393  double throughput = totalPacketsThroughA * payloadSize * 8 / (simulationTime * 1000000.0);
394  std::cout << "Default configuration (A-MPDU aggregation enabled, 65kB): " << '\n'
395  << " Throughput = " << throughput << " Mbit/s" << '\n';
396  if (verifyResults && (throughput < 57.5 || throughput > 58.5))
397  {
398  NS_LOG_ERROR ("Obtained throughput " << throughput << " is not in the expected boundaries!");
399  exit (1);
400  }
401  if (txopLimit)
402  {
403  std::cout << " Maximum TXOP duration (TXOP limit = " << txopLimit << "us): "
404  << netA.m_max.GetMicroSeconds () << " us" << '\n';
405  if (verifyResults && txopLimit && (netA.m_max < MicroSeconds (3350) || netA.m_max > MicroSeconds (3520)))
406  {
407  NS_LOG_ERROR ("Maximum TXOP duration " << netA.m_max << " is not in the expected boundaries!");
408  exit (1);
409  }
410  }
411 
412  throughput = totalPacketsThroughB * payloadSize * 8 / (simulationTime * 1000000.0);
413  std::cout << "Aggregation disabled: " << '\n'
414  << " Throughput = " << throughput << " Mbit/s" << '\n';
415  if (verifyResults && (throughput < 38 || throughput > 39))
416  {
417  NS_LOG_ERROR ("Obtained throughput " << throughput << " is not in the expected boundaries!");
418  exit (1);
419  }
420  if (txopLimit)
421  {
422  std::cout << " Maximum TXOP duration (TXOP limit = " << txopLimit << "us): "
423  << netB.m_max.GetMicroSeconds () << " us" << '\n';
424  if (verifyResults && (netB.m_max < MicroSeconds (3350) || netB.m_max > MicroSeconds (3520)))
425  {
426  NS_LOG_ERROR ("Maximum TXOP duration " << netB.m_max << " is not in the expected boundaries!");
427  exit (1);
428  }
429  }
430 
431  throughput = totalPacketsThroughC * payloadSize * 8 / (simulationTime * 1000000.0);
432  std::cout << "A-MPDU disabled and A-MSDU enabled (8kB): " << '\n'
433  << " Throughput = " << throughput << " Mbit/s" << '\n';
434  if (verifyResults && (throughput < 52 || throughput > 53))
435  {
436  NS_LOG_ERROR ("Obtained throughput " << throughput << " is not in the expected boundaries!");
437  exit (1);
438  }
439  if (txopLimit)
440  {
441  std::cout << " Maximum TXOP duration (TXOP limit = " << txopLimit << "us): "
442  << netC.m_max.GetMicroSeconds () << " us" << '\n';
443  if (verifyResults && (netC.m_max < MicroSeconds (3350) || netC.m_max > MicroSeconds (3520)))
444  {
445  NS_LOG_ERROR ("Maximum TXOP duration " << netC.m_max << " is not in the expected boundaries!");
446  exit (1);
447  }
448  }
449 
450  throughput = totalPacketsThroughD * payloadSize * 8 / (simulationTime * 1000000.0);
451  std::cout << "A-MPDU enabled (32kB) and A-MSDU enabled (4kB): " << '\n'
452  << " Throughput = " << throughput << " Mbit/s" << '\n';
453  if (verifyResults && (throughput < 58 || throughput > 59))
454  {
455  NS_LOG_ERROR ("Obtained throughput " << throughput << " is not in the expected boundaries!");
456  exit (1);
457  }
458  if (txopLimit)
459  {
460  std::cout << " Maximum TXOP duration (TXOP limit = " << txopLimit << "us): "
461  << netD.m_max.GetMicroSeconds () << " us" << '\n';
462  if (verifyResults && txopLimit && (netD.m_max < MicroSeconds (3350) || netD.m_max > MicroSeconds (3520)))
463  {
464  NS_LOG_ERROR ("Maximum TXOP duration " << netD.m_max << " is not in the expected boundaries!");
465  exit (1);
466  }
467  }
468 
469  return 0;
470 }
ns3::NetDeviceContainer
holds a vector of ns3::NetDevice pointers
Definition: net-device-container.h:42
ns3::WIFI_STANDARD_80211n_5GHZ
@ WIFI_STANDARD_80211n_5GHZ
Definition: wifi-standards.h:132
NS_LOG_COMPONENT_DEFINE
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:205
ns3::ApplicationContainer::Get
Ptr< Application > Get(uint32_t i) const
Get the Ptr<Application> stored in this container at a given index.
Definition: application-container.cc:62
ns3::YansWifiChannelHelper::Default
static YansWifiChannelHelper Default(void)
Create a channel helper in a default working state.
Definition: yans-wifi-helper.cc:41
ns3::UdpClientHelper
Create a client application which sends UDP packets carrying a 32bit sequence number and a 64 bit tim...
Definition: udp-client-server-helper.h:94
ns3::YansWifiPhyHelper
Make it easy to create and manage PHY objects for the YANS model.
Definition: yans-wifi-helper.h:161
ns3::CommandLine
Parse command-line arguments.
Definition: command-line.h:228
ns3::ListPositionAllocator::Add
void Add(Vector v)
Add a position to the list of positions.
Definition: position-allocator.cc:70
ns3::BooleanValue
AttributeValue implementation for Boolean.
Definition: boolean.h:37
ns3
Every class exported by the ns3 library is enclosed in the ns3 namespace.
ns3::ApplicationContainer::Stop
void Stop(Time stop)
Arrange for all of the Applications in this container to Stop() at the Time given as a parameter.
Definition: application-container.cc:107
ns3::WifiHelper
helps to create WifiNetDevice objects
Definition: wifi-helper.h:327
ns3::Ipv4AddressHelper
A helper class to make life easier while doing simple IPv4 address assignment in scripts.
Definition: ipv4-address-helper.h:48
ns3::MicroSeconds
Time MicroSeconds(uint64_t value)
Construct a Time in the indicated unit.
Definition: nstime.h:1305
third.channel
channel
Definition: third.py:92
TxopDurationTracer
Keeps the maximum duration among all TXOPs.
Definition: wifi-80211e-txop.cc:72
ns3::PointerValue
Hold objects of type Ptr<T>.
Definition: pointer.h:37
ns3::WifiPhyHelper::DLT_IEEE802_11_RADIO
@ DLT_IEEE802_11_RADIO
Include Radiotap link layer information.
Definition: wifi-helper.h:180
third.mac
mac
Definition: third.py:99
TxopDurationTracer::Trace
void Trace(Time startTime, Time duration)
ns3::NodeContainer::Create
void Create(uint32_t n)
Create n nodes and append pointers to them to the end of this NodeContainer.
Definition: node-container.cc:98
ns3::SsidValue
AttributeValue implementation for Ssid.
Definition: ssid.h:105
ns3::Ssid
The IEEE 802.11 SSID Information Element.
Definition: ssid.h:36
ns3::UdpServerHelper
Create a server application which waits for input UDP packets and uses the information carried into t...
Definition: udp-client-server-helper.h:38
startTime
double startTime
Definition: tcp-nsc-comparison.cc:45
third.wifi
wifi
Definition: third.py:96
ns3::Ptr< NetDevice >
first.stack
stack
Definition: first.py:41
ns3::Simulator::Stop
static void Stop(void)
Tell the Simulator the calling event should be the last one executed.
Definition: simulator.cc:180
ns3::Time::GetMicroSeconds
int64_t GetMicroSeconds(void) const
Get an approximation of the time stored in this instance in the indicated unit.
Definition: nstime.h:388
TxopDurationTracer::m_max
Time m_max
Definition: wifi-80211e-txop.cc:74
ns3::Node::GetDevice
Ptr< NetDevice > GetDevice(uint32_t index) const
Retrieve the index-th NetDevice associated to this node.
Definition: node.cc:144
ns3::Ipv4InterfaceContainer
holds a vector of std::pair of Ptr<Ipv4> and interface index.
Definition: ipv4-interface-container.h:55
ns3::PointerValue::Get
Ptr< T > Get(void) const
Definition: pointer.h:201
ns3::NodeContainer::Get
Ptr< Node > Get(uint32_t i) const
Get the Ptr<Node> stored in this container at a given index.
Definition: node-container.cc:93
first.address
address
Definition: first.py:44
ns3::Time
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:104
second.cmd
cmd
Definition: second.py:35
ns3::QosTxop
Handle packet fragmentation and retransmissions for QoS data frames as well as MSDU aggregation (A-MS...
Definition: qos-txop.h:75
ns3::MakeCallback
Callback< R, Ts... > MakeCallback(R(T::*memPtr)(Ts...), OBJ objPtr)
Build Callbacks for class method members which take varying numbers of arguments and potentially retu...
Definition: callback.h:1642
ns3::Simulator::Run
static void Run(void)
Run the simulation.
Definition: simulator.cc:172
ns3::StringValue
Hold variables of type string.
Definition: string.h:41
NS_LOG_ERROR
#define NS_LOG_ERROR(msg)
Use NS_LOG to output a message of level LOG_ERROR.
Definition: log.h:257
ns3::ApplicationContainer::Start
void Start(Time start)
Arrange for all of the Applications in this container to Start() at the Time given as a parameter.
Definition: application-container.cc:87
ns3::Seconds
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition: nstime.h:1289
ns3::Simulator::Destroy
static void Destroy(void)
Execute the events scheduled with ScheduleDestroy().
Definition: simulator.cc:136
ns3::ApplicationContainer
holds a vector of ns3::Application pointers.
Definition: application-container.h:43
third.ssid
ssid
Definition: third.py:100
ns3::TimeValue
AttributeValue implementation for Time.
Definition: nstime.h:1353
ns3::Txop::SetTxopLimit
void SetTxopLimit(Time txopLimit)
Set the TXOP limit.
Definition: txop.cc:249
ns3::NodeContainer
keep track of a set of node pointers.
Definition: node-container.h:39
third.wifiStaNodes
wifiStaNodes
Definition: third.py:88
ns3::Ipv4InterfaceContainer::GetAddress
Ipv4Address GetAddress(uint32_t i, uint32_t j=0) const
Definition: ipv4-interface-container.cc:59
ns3::UintegerValue
Hold an unsigned integer type.
Definition: uinteger.h:44
ns3::YansWifiChannelHelper
manage and create wifi channel objects for the YANS model.
Definition: yans-wifi-helper.h:37
ns3::WifiMacHelper
create MAC layers for a ns3::WifiNetDevice.
Definition: wifi-mac-helper.h:48
ns3::Config::SetDefault
void SetDefault(std::string name, const AttributeValue &value)
Definition: config.cc:849
ns3::ObjectBase::TraceConnectWithoutContext
bool TraceConnectWithoutContext(std::string name, const CallbackBase &cb)
Connect a TraceSource to a Callback without a context.
Definition: object-base.cc:293
ns3::InternetStackHelper
aggregate IP/TCP/UDP functionality to existing Nodes.
Definition: internet-stack-helper.h:88
ns3::NetDeviceContainer::Get
Ptr< NetDevice > Get(uint32_t i) const
Get the Ptr<NetDevice> stored in this container at a given index.
Definition: net-device-container.cc:62
ns3::MobilityHelper
Helper class used to assign positions and mobility models to nodes.
Definition: mobility-helper.h:43
third.mobility
mobility
Definition: third.py:108
third.phy
phy
Definition: third.py:93
enablePcap
bool enablePcap
Definition: tcp-nsc-comparison.cc:48
port
uint16_t port
Definition: dsdv-manet.cc:45
ns3::WifiNetDevice::GetMac
Ptr< WifiMac > GetMac(void) const
Definition: wifi-net-device.cc:201