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Ad hoc网络
Ad hoc网是一种多跳的、无中心的、自组织无线网络,又称为多跳网(Multi-hop Network)、无基础设施网(Infrastructureless Network)或自组织网(Self-organizing Network)。整个网络没有固定的基础设施,每个节点都是移动的,并且都能以任意方式动态地保持与其它节点的联系。在这种网络中,由于终端无线覆盖取值范围的有限性,两个无法直接进行通信的用户终端可以借助其它节点进行分组转发。每一个节点同时是一个路由器,它们能完成发现以及维持到其它节点路由的功能。
/* -*- 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/network-module.h" #include "ns3/applications-module.h" #include "ns3/wifi-module.h" #include "ns3/mobility-module.h" #include "ns3/internet-module.h" using namespace ns3; NS_LOG_COMPONENT_DEFINE ("AdHocExample"); int main(int argc,char *argv[]) { Time::SetResolution (Time::NS); LogComponentEnable ("AdHocExample", LOG_LEVEL_INFO); // LogComponentEnable ("TcpL4Protocol", LOG_LEVEL_INFO); LogComponentEnable ("PacketSink", LOG_LEVEL_ALL); uint32_t nAdHoc=30; CommandLine cmd; cmd.AddValue ("nAdHoc", "Number of wifi ad devices", nAdHoc); cmd.Parse (argc,argv); NodeContainer AdHocNode; AdHocNode.Create(nAdHoc); YansWifiChannelHelper channel = YansWifiChannelHelper::Default (); YansWifiPhyHelper phy = YansWifiPhyHelper::Default (); phy.SetChannel (channel.Create ()); WifiHelper wifi; wifi.SetStandard(WIFI_PHY_STANDARD_80211a); //设置标准 wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager","DataMode",StringValue("OfdmRate6Mbps")); NqosWifiMacHelper mac = NqosWifiMacHelper::Default (); mac.SetType ("ns3::AdhocWifiMac", "Slot", StringValue ("16us")); NetDeviceContainer AdHocDevices; AdHocDevices = wifi.Install(phy,mac,AdHocNode); MobilityHelper mobility; mobility.SetPositionAllocator ("ns3::GridPositionAllocator", "MinX", DoubleValue (0.0), "MinY", DoubleValue (0.0), "DeltaX", DoubleValue (5.0), "DeltaY", DoubleValue (5.0), "GridWidth", UintegerValue (10), "LayoutType", StringValue ("RowFirst")); mobility.SetMobilityModel ("ns3::RandomWalk2dMobilityModel", "Bounds", RectangleValue (Rectangle (-500, 500, -500, 500))); mobility.Install (AdHocNode); InternetStackHelper Internet; Internet.Install(AdHocNode); Ipv4AddressHelper address; address.SetBase("195.1.1.0","255.255.255.0"); Ipv4InterfaceContainer AdHocIp; AdHocIp = address.Assign(AdHocDevices); NS_LOG_INFO ("Create Applications."); uint16_t port = 9999; OnOffHelper onOff1("ns3::TcpSocketFactory",Address(InetSocketAddress(AdHocIp.GetAddress(0),port))); onOff1.SetAttribute ("OnTime", StringValue ("ns3::ConstantRandomVariable[Constant=1]")); onOff1.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]")); ApplicationContainer apps1 = onOff1.Install(AdHocNode); apps1.Start(Seconds(1.0)); apps1.Stop(Seconds(500.0)); PacketSinkHelper sinkHelper ("ns3::TcpSocketFactory", Address(InetSocketAddress (Ipv4Address::GetAny(), port))); ApplicationContainer apps2 = sinkHelper.Install(AdHocNode.Get(0)); apps2.Start(Seconds(0.0)); apps2.Stop(Seconds(500.0)); Ipv4GlobalRoutingHelper::PopulateRoutingTables (); Simulator::Stop(Seconds(500.0)); Simulator::Run(); Simulator::Destroy(); return 0; }
模拟一个1千平方米的,场景中分布了30个adhoc 节点,其余节点向0号节点不断发送数据。
模拟结果
两张数据爆炸的图。。。
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原文地址:http://www.cnblogs.com/wpqwpq/p/5766739.html