A Discrete-Event Network Simulator
API
wifi-timing-attributes.cc
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2 /*
3  * Copyright (c) 2015
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12  * GNU General Public License for more details.
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18  * Author: Sebastien 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/double.h"
25 #include "ns3/string.h"
26 #include "ns3/log.h"
27 #include "ns3/yans-wifi-helper.h"
28 #include "ns3/ssid.h"
29 #include "ns3/mobility-helper.h"
30 #include "ns3/ipv4-address-helper.h"
31 #include "ns3/yans-wifi-channel.h"
32 #include "ns3/mobility-model.h"
33 #include "ns3/internet-stack-helper.h"
34 #include "ns3/udp-client-server-helper.h"
35 #include "ns3/ipv4-global-routing-helper.h"
36 
37 // This example shows how to set Wi-Fi timing parameters through WifiMac attributes.
38 //
39 // Example: set slot time to 20 microseconds, while keeping other values as defined in the simulation script:
40 //
41 // ./waf --run "wifi-timing-attributes --slot=20"
42 //
43 // Network topology:
44 //
45 // Wifi 192.168.1.0
46 //
47 // AP
48 // * *
49 // | |
50 // n1 n2
51 
52 using namespace ns3;
53 
54 NS_LOG_COMPONENT_DEFINE ("wifi-timing-attributes");
55 
56 int main (int argc, char *argv[])
57 {
58  uint32_t slot = 9; //slot time in microseconds
59  uint32_t sifs = 10; //SIFS duration in microseconds
60  uint32_t ackTimeout = 88; //ACK timeout duration in microseconds
61  uint32_t ctsTimeout = 88; //CTS timeout duration in microseconds
62  uint32_t rifs = 2; //RIFS duration in microseconds
63  uint32_t basicBlockAckTimeout = 286; //Basic Block ACK timeout duration in microseconds
64  uint32_t compressedBlockAckTimeout = 112; //Compressed Block ACK timeout duration in microseconds
65  double simulationTime = 10; //simulation time in seconds
66 
68  cmd.AddValue ("slot", "Slot time in microseconds", slot);
69  cmd.AddValue ("sifs", "SIFS duration in microseconds", sifs);
70  cmd.AddValue ("ackTimeout", "ACK timeout duration in microseconds", ackTimeout);
71  cmd.AddValue ("ctsTimeout", "CTS timeout duration in microseconds", ctsTimeout);
72  cmd.AddValue ("rifs", "RIFS duration in microseconds", rifs);
73  cmd.AddValue ("basicBlockAckTimeoutTimeout", "Basic Block ACK timeout duration in microseconds", basicBlockAckTimeout);
74  cmd.AddValue ("compressedBlockAckTimeoutTimeout", "Compressed Block ACK timeout duration in microseconds", compressedBlockAckTimeout);
75  cmd.AddValue ("simulationTime", "Simulation time in seconds", simulationTime);
76  cmd.Parse (argc,argv);
77 
78  //Since default reference loss is defined for 5 GHz, it needs to be changed when operating at 2.4 GHz
79  Config::SetDefault ("ns3::LogDistancePropagationLossModel::ReferenceLoss", DoubleValue (40.046));
80 
81  //Create nodes
82  NodeContainer wifiStaNode;
83  wifiStaNode.Create (1);
85  wifiApNode.Create (1);
86 
87  //Create wireless channel
90  phy.SetChannel (channel.Create ());
91 
92  //Default IEEE 802.11n (2.4 GHz)
95  wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
96  "DataMode", StringValue ("HtMcs7"),
97  "ControlMode", StringValue ("HtMcs0"));
99 
100  //Install PHY and MAC
101  Ssid ssid = Ssid ("ns3-wifi");
102  mac.SetType ("ns3::StaWifiMac",
103  "Ssid", SsidValue (ssid));
104 
105  NetDeviceContainer staDevice;
106  staDevice = wifi.Install (phy, mac, wifiStaNode);
107 
108  mac.SetType ("ns3::ApWifiMac",
109  "Ssid", SsidValue (ssid));
110 
111  NetDeviceContainer apDevice;
112  apDevice = wifi.Install (phy, mac, wifiApNode);
113 
114  //Once install is done, we overwrite the standard timing values
115  Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Mac/Slot", TimeValue (MicroSeconds (slot)));
116  Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Mac/Sifs", TimeValue (MicroSeconds (sifs)));
117  Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Mac/AckTimeout", TimeValue (MicroSeconds (ackTimeout)));
118  Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Mac/CtsTimeout", TimeValue (MicroSeconds (ctsTimeout)));
119  Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Mac/Rifs", TimeValue (MicroSeconds (rifs)));
120  Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Mac/BasicBlockAckTimeout", TimeValue (MicroSeconds (basicBlockAckTimeout)));
121  Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Mac/CompressedBlockAckTimeout", TimeValue (MicroSeconds (compressedBlockAckTimeout)));
122 
123  //Mobility
125  Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();
126 
127  positionAlloc->Add (Vector (0.0, 0.0, 0.0));
128  positionAlloc->Add (Vector (1.0, 0.0, 0.0));
129  mobility.SetPositionAllocator (positionAlloc);
130 
131  mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
132 
133  mobility.Install (wifiApNode);
134  mobility.Install (wifiStaNode);
135 
136  //Internet stack
138  stack.Install (wifiApNode);
139  stack.Install (wifiStaNode);
140 
142 
143  address.SetBase ("192.168.1.0", "255.255.255.0");
144  Ipv4InterfaceContainer staNodeInterface;
145  Ipv4InterfaceContainer apNodeInterface;
146 
147  staNodeInterface = address.Assign (staDevice);
148  apNodeInterface = address.Assign (apDevice);
149 
150  //Setting applications
151  uint16_t port = 9;
152  UdpServerHelper server (port);
153  ApplicationContainer serverApp = server.Install (wifiStaNode.Get (0));
154  serverApp.Start (Seconds (0.0));
155  serverApp.Stop (Seconds (simulationTime + 1));
156 
157  UdpClientHelper client (staNodeInterface.GetAddress (0), port);
158  client.SetAttribute ("MaxPackets", UintegerValue (4294967295u));
159  client.SetAttribute ("Interval", TimeValue (Time ("0.00002"))); //packets/s
160  client.SetAttribute ("PacketSize", UintegerValue (1472)); //bytes
161 
162  ApplicationContainer clientApp = client.Install (wifiApNode.Get (0));
163  clientApp.Start (Seconds (1.0));
164  clientApp.Stop (Seconds (simulationTime + 1));
165 
166  //Populate routing table
168 
169  //Set simulation time and launch simulation
170  Simulator::Stop (Seconds (simulationTime + 1));
171  Simulator::Run ();
172 
173  //Get and print results
174  uint64_t totalPacketsThrough = DynamicCast<UdpServer> (serverApp.Get (0))->GetReceived ();
175  double throughput = totalPacketsThrough * 1472 * 8 / (simulationTime * 1000000.0); //Mbit/s
176  std::cout << "Throughput: " << throughput << " Mbit/s" << std::endl;
177 
179  return 0;
180 }
holds a vector of ns3::Application pointers.
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:102
Smart pointer class similar to boost::intrusive_ptr.
Definition: ptr.h:73
holds a vector of std::pair of Ptr<Ipv4> and interface index.
static void PopulateRoutingTables(void)
Build a routing database and initialize the routing tables of the nodes in the simulation.
Hold variables of type string.
Definition: string.h:41
Make it easy to create and manage PHY objects for the yans model.
static YansWifiChannelHelper Default(void)
Create a channel helper in a default working state.
void Set(std::string path, const AttributeValue &value)
Definition: config.cc:777
static void Run(void)
Run the simulation.
Definition: simulator.cc:226
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:202
aggregate IP/TCP/UDP functionality to existing Nodes.
cmd
Definition: second.py:35
HT PHY for the 2.4 GHz band (clause 20)
static YansWifiPhyHelper Default(void)
Create a phy helper in a default working state.
helps to create WifiNetDevice objects
Definition: wifi-helper.h:230
stack
Definition: first.py:34
uint16_t port
Definition: dsdv-manet.cc:45
channel
Definition: third.py:85
mobility
Definition: third.py:101
phy
Definition: third.py:86
Create a client application which sends UDP packets carrying a 32bit sequence number and a 64 bit tim...
AttributeValue implementation for Time.
Definition: nstime.h:1076
Ipv4Address GetAddress(uint32_t i, uint32_t j=0) const
Hold an unsigned integer type.
Definition: uinteger.h:44
ssid
Definition: third.py:93
holds a vector of ns3::NetDevice pointers
mac
Definition: third.py:92
Create a server application which waits for input UDP packets and uses the information carried into t...
wifiApNode
Definition: third.py:83
void Start(Time start)
Arrange for all of the Applications in this container to Start() at the Time given as a parameter...
Parse command-line arguments.
Definition: command-line.h:213
static void Destroy(void)
Execute the events scheduled with ScheduleDestroy().
Definition: simulator.cc:190
void SetAttribute(std::string name, const AttributeValue &value)
Record an attribute to be set in each Application after it is is created.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
keep track of a set of node pointers.
address
Definition: first.py:37
manage and create wifi channel objects for the yans model.
create MAC layers for a ns3::WifiNetDevice.
The IEEE 802.11 SSID Information Element.
Definition: ssid.h:35
wifi
Definition: third.py:89
Helper class used to assign positions and mobility models to nodes.
void Stop(Time stop)
Arrange for all of the Applications in this container to Stop() at the Time given as a parameter...
static void Stop(void)
Tell the Simulator the calling event should be the last one executed.
Definition: simulator.cc:234
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition: nstime.h:1014
AttributeValue implementation for Ssid.
Definition: ssid.h:110
void SetDefault(std::string name, const AttributeValue &value)
Definition: config.cc:782
void Add(Vector v)
Add a position to the list of positions.
Ptr< Node > Get(uint32_t i) const
Get the Ptr<Node> stored in this container at a given index.
A helper class to make life easier while doing simple IPv4 address assignment in scripts.
Time MicroSeconds(uint64_t value)
Construct a Time in the indicated unit.
Definition: nstime.h:1030
void Create(uint32_t n)
Create n nodes and append pointers to them to the end of this NodeContainer.
This class can be used to hold variables of floating point type such as &#39;double&#39; or &#39;float&#39;...
Definition: double.h:41
Ptr< Application > Get(uint32_t i) const
Get the Ptr<Application> stored in this container at a given index.