ns3 模擬無線網絡通訊

時間 2019-11-10

標籤 ns3 模擬無線網絡通訊欄目無線简体版

原文原文鏈接

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "ns3/core-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/network-module.h"
#include "ns3/applications-module.h"
#include "ns3/wifi-module.h"
#include "ns3/mobility-module.h"
#include "ns3/csma-module.h"
#include "ns3/internet-module.h"


using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("ThirdScriptExample");

int
main (int argc, char *argv[])
{
  Time::SetResolution (Time::NS);

  bool verbose = true;
  uint32_t nWifi = 3; //設置 無線站點個數
  bool tracing = false;

  CommandLine cmd;
  cmd.AddValue ("nWifi", "Number of wifi STA devices", nWifi);
  cmd.AddValue ("verbose", "Tell echo applications to log if true", verbose);  
  //用命令行修改參數
  cmd.Parse (argc,argv);


  if (nWifi > 250)
    {
      std::cout << "Too many wifi or csma nodes, no more than 250 each." << std::endl;
      return 1;
    }

  if (verbose)
    {
      LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_ALL);
      LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_ALL);
    }


  NodeContainer wifiStaNodes;
  wifiStaNodes.Create (nWifi);  //建立無線站點STA的節點
  NodeContainer wifiApNode;
  wifiApNode.Create(1);   //建立一個AP節點
  
  YansWifiChannelHelper channel = YansWifiChannelHelper::Default ();   //使用默認的信道模型
  YansWifiPhyHelper phy = YansWifiPhyHelper::Default ();  //使用默認的PHY模型
  phy.SetChannel (channel.Create ());  //建立通道對象並把他關聯到物理層對象管理器

  WifiHelper wifi;
  wifi.SetRemoteStationManager ("ns3::AarfWifiManager");  //設置wifi助手用AARF速率控制算法  

  //配置Mac類型以及基礎設置SSID
  WifiMacHelper mac;  
  Ssid ssid = Ssid ("ns-3-aqiao");  //設置SSID的名字爲ns-3-aqiao
  mac.SetType ("ns3::StaWifiMac",    //指定mac層指定爲ns3::StaWifiMac
               "Ssid", SsidValue (ssid),   //設置默認AP是ssid對象
               "ActiveProbing", BooleanValue (false));  //設置不會發出主動探測AP的指令，默認AP是ssid

  NetDeviceContainer staDevices;
  staDevices = wifi.Install (phy, mac, wifiStaNodes);  //在MAC層和PHY層用之前安裝方法來建立這些無線設備

  mac.SetType ("ns3::ApWifiMac",   //指定爲AP
               "Ssid", SsidValue (ssid));    

  NetDeviceContainer apDevices;
  apDevices = wifi.Install (phy, mac, wifiApNode);   //一塊兒共享PHY層的屬性

  // 加入移動模型，讓STA能夠移動，AP固定
  MobilityHelper mobility;  

  mobility.SetPositionAllocator ("ns3::GridPositionAllocator",
                                 "MinX", DoubleValue (0.0),
                                 "MinY", DoubleValue (0.0),
                                 "DeltaX", DoubleValue (5.0),
                                 "DeltaY", DoubleValue (10.0),
                                 "GridWidth", UintegerValue (3),
                                 "LayoutType", StringValue ("RowFirst"));
  //設置初始時，節點的擺放位置
   
  mobility.SetMobilityModel ("ns3::RandomWalk2dMobilityModel",   //設置移動模式爲"ns3::RandomWalk2dMobilityModel"，隨機移動
                             "Bounds", RectangleValue (Rectangle (-50, 50, -50, 50)));   //移動範圍
  mobility.Install (wifiStaNodes);
  
  mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");  //設置AP的不可以移動的，"ns3::ConstantPositionMobilityModel"
  mobility.Install (wifiApNode);

  InternetStackHelper stack;
  stack.Install (wifiApNode);
  stack.Install (wifiStaNodes);   //安裝協議棧

  Ipv4AddressHelper address;

  address.SetBase ("10.1.3.0", "255.255.255.0");
  Ipv4InterfaceContainer wifiInterfaces;
  wifiInterfaces=address.Assign (staDevices);
  address.Assign (apDevices);                 //地址分配

  //安裝暗涌程序，使用UDP，與以前的UDP的使用方法一致
  UdpEchoServerHelper echoServer (9);

  ApplicationContainer serverApps = echoServer.Install (wifiStaNodes.Get (0));
  serverApps.Start (Seconds (1.0));
  serverApps.Stop (Seconds (10.0));

  UdpEchoClientHelper echoClient (wifiInterfaces.GetAddress (0), 9);
  echoClient.SetAttribute ("MaxPackets", UintegerValue (5));
  echoClient.SetAttribute ("Interval", TimeValue (Seconds (1.0)));
  echoClient.SetAttribute ("PacketSize", UintegerValue (1024));

  ApplicationContainer clientApps =
    echoClient.Install (wifiStaNodes.Get (nWifi - 1));
  clientApps.Start (Seconds (2.0));
  clientApps.Stop (Seconds (10.0));

  Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

  Simulator::Stop (Seconds (10.0));

  phy.EnablePcap ("wifiwifi", apDevices.Get (0));

  Simulator::Run ();
  Simulator::Destroy ();
  return 0;
}

輸出結果node