1 /* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
2 /*
3 * Copyright (c) 2015
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 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
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
main(int argc,char * argv[])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 pifs = 19; //PIFS duration in microseconds
61 double simulationTime = 10; //simulation time in seconds
62
63 CommandLine cmd (__FILE__);
64 cmd.AddValue ("slot", "Slot time in microseconds", slot);
65 cmd.AddValue ("sifs", "SIFS duration in microseconds", sifs);
66 cmd.AddValue ("pifs", "PIFS duration in microseconds", pifs);
67 cmd.AddValue ("simulationTime", "Simulation time in seconds", simulationTime);
68 cmd.Parse (argc,argv);
69
70 //Since default reference loss is defined for 5 GHz, it needs to be changed when operating at 2.4 GHz
71 Config::SetDefault ("ns3::LogDistancePropagationLossModel::ReferenceLoss", DoubleValue (40.046));
72
73 //Create nodes
74 NodeContainer wifiStaNode;
75 wifiStaNode.Create (1);
76 NodeContainer wifiApNode;
77 wifiApNode.Create (1);
78
79 //Create wireless channel
80 YansWifiChannelHelper channel = YansWifiChannelHelper::Default ();
81 YansWifiPhyHelper phy;
82 phy.SetChannel (channel.Create ());
83
84 //Default IEEE 802.11n (2.4 GHz)
85 WifiHelper wifi;
86 wifi.SetStandard (WIFI_STANDARD_80211n_2_4GHZ);
87 wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
88 "DataMode", StringValue ("HtMcs7"),
89 "ControlMode", StringValue ("HtMcs0"));
90 WifiMacHelper mac;
91
92 //Install PHY and MAC
93 Ssid ssid = Ssid ("ns3-wifi");
94 mac.SetType ("ns3::StaWifiMac",
95 "Ssid", SsidValue (ssid));
96
97 NetDeviceContainer staDevice;
98 staDevice = wifi.Install (phy, mac, wifiStaNode);
99
100 mac.SetType ("ns3::ApWifiMac",
101 "Ssid", SsidValue (ssid));
102
103 NetDeviceContainer apDevice;
104 apDevice = wifi.Install (phy, mac, wifiApNode);
105
106 //Once install is done, we overwrite the standard timing values
107 Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/Slot", TimeValue (MicroSeconds (slot)));
108 Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/Sifs", TimeValue (MicroSeconds (sifs)));
109 Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/Pifs", TimeValue (MicroSeconds (pifs)));
110
111 //Mobility
112 MobilityHelper mobility;
113 Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();
114
115 positionAlloc->Add (Vector (0.0, 0.0, 0.0));
116 positionAlloc->Add (Vector (1.0, 0.0, 0.0));
117 mobility.SetPositionAllocator (positionAlloc);
118
119 mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
120
121 mobility.Install (wifiApNode);
122 mobility.Install (wifiStaNode);
123
124 //Internet stack
125 InternetStackHelper stack;
126 stack.Install (wifiApNode);
127 stack.Install (wifiStaNode);
128
129 Ipv4AddressHelper address;
130
131 address.SetBase ("192.168.1.0", "255.255.255.0");
132 Ipv4InterfaceContainer staNodeInterface;
133 Ipv4InterfaceContainer apNodeInterface;
134
135 staNodeInterface = address.Assign (staDevice);
136 apNodeInterface = address.Assign (apDevice);
137
138 //Setting applications
139 uint16_t port = 9;
140 UdpServerHelper server (port);
141 ApplicationContainer serverApp = server.Install (wifiStaNode.Get (0));
142 serverApp.Start (Seconds (0.0));
143 serverApp.Stop (Seconds (simulationTime + 1));
144
145 UdpClientHelper client (staNodeInterface.GetAddress (0), port);
146 client.SetAttribute ("MaxPackets", UintegerValue (4294967295u));
147 client.SetAttribute ("Interval", TimeValue (Time ("0.0001"))); //packets/s
148 client.SetAttribute ("PacketSize", UintegerValue (1472)); //bytes
149
150 ApplicationContainer clientApp = client.Install (wifiApNode.Get (0));
151 clientApp.Start (Seconds (1.0));
152 clientApp.Stop (Seconds (simulationTime + 1));
153
154 //Populate routing table
155 Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
156
157 //Set simulation time and launch simulation
158 Simulator::Stop (Seconds (simulationTime + 1));
159 Simulator::Run ();
160
161 //Get and print results
162 uint64_t totalPacketsThrough = DynamicCast<UdpServer> (serverApp.Get (0))->GetReceived ();
163 double throughput = totalPacketsThrough * 1472 * 8 / (simulationTime * 1000000.0); //Mbit/s
164 std::cout << "Throughput: " << throughput << " Mbit/s" << std::endl;
165
166 Simulator::Destroy ();
167 return 0;
168 }
169