427 lines
18 KiB
C++
427 lines
18 KiB
C++
/*
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* SPDX-License-Identifier: GPL-2.0-only
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*
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*/
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//
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// This ns-3 example demonstrates the use of helper functions to ease
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// the construction of simulation scenarios.
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//
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// The simulation topology consists of a mixed wired and wireless
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// scenario in which a hierarchical mobility model is used.
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//
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// The simulation layout consists of N backbone routers interconnected
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// by an ad hoc wifi network.
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// Each backbone router also has a local 802.11 network and is connected
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// to a local LAN. An additional set of (K-1) nodes are connected to
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// this backbone. Finally, a local LAN is connected to each router
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// on the backbone, with L-1 additional hosts.
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//
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// The nodes are populated with TCP/IP stacks, and OLSR unicast routing
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// on the backbone. An example UDP transfer is shown. The simulator
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// be configured to output tcpdumps or traces from different nodes.
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//
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//
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// +--------------------------------------------------------+
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// | |
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// | 802.11 ad hoc, ns-2 mobility |
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// | |
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// +--------------------------------------------------------+
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// | o o o (N backbone routers) |
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// +--------+ +--------+
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// wired LAN | mobile | wired LAN | mobile |
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// -----------| router | -----------| router |
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// --------- ---------
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// | |
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// +----------------+ +----------------+
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// | 802.11 | | 802.11 |
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// | infra net | | infra net |
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// | K-1 hosts | | K-1 hosts |
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// +----------------+ +----------------+
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//
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// We'll send data from the first wired LAN node on the first wired LAN
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// to the last wireless STA on the last infrastructure net, thereby
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// causing packets to traverse CSMA to adhoc to infrastructure links
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//
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// Note that certain mobility patterns may cause packet forwarding
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// to fail (if nodes become disconnected)
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#include "ns3/animation-interface.h"
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#include "ns3/command-line.h"
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#include "ns3/csma-helper.h"
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#include "ns3/internet-stack-helper.h"
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#include "ns3/ipv4-address-helper.h"
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#include "ns3/mobility-helper.h"
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#include "ns3/olsr-helper.h"
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#include "ns3/on-off-helper.h"
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#include "ns3/packet-sink-helper.h"
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#include "ns3/qos-txop.h"
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#include "ns3/ssid.h"
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#include "ns3/string.h"
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#include "ns3/yans-wifi-channel.h"
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#include "ns3/yans-wifi-helper.h"
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using namespace ns3;
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//
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// Define logging keyword for this file
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//
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NS_LOG_COMPONENT_DEFINE("MixedWireless");
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/**
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* This function will be used below as a trace sink, if the command-line
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* argument or default value "useCourseChangeCallback" is set to true
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*
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* @param path The callback path.
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* @param model The mobility model.
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*/
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static void
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CourseChangeCallback(std::string path, Ptr<const MobilityModel> model)
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{
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Vector position = model->GetPosition();
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std::cout << "CourseChange " << path << " x=" << position.x << ", y=" << position.y
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<< ", z=" << position.z << std::endl;
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}
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int
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main(int argc, char* argv[])
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{
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//
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// First, we declare and initialize a few local variables that control some
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// simulation parameters.
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//
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uint32_t backboneNodes = 10;
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uint32_t infraNodes = 2;
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uint32_t lanNodes = 2;
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uint32_t stopTime = 20;
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bool useCourseChangeCallback = false;
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//
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// Simulation defaults are typically set next, before command line
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// arguments are parsed.
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//
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Config::SetDefault("ns3::OnOffApplication::PacketSize", StringValue("1472"));
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Config::SetDefault("ns3::OnOffApplication::DataRate", StringValue("100kb/s"));
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//
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// For convenience, we add the local variables to the command line argument
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// system so that they can be overridden with flags such as
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// "--backboneNodes=20"
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//
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CommandLine cmd(__FILE__);
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cmd.AddValue("backboneNodes", "number of backbone nodes", backboneNodes);
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cmd.AddValue("infraNodes", "number of leaf nodes", infraNodes);
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cmd.AddValue("lanNodes", "number of LAN nodes", lanNodes);
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cmd.AddValue("stopTime", "simulation stop time (seconds)", stopTime);
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cmd.AddValue("useCourseChangeCallback",
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"whether to enable course change tracing",
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useCourseChangeCallback);
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//
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// The system global variables and the local values added to the argument
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// system can be overridden by command line arguments by using this call.
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//
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cmd.Parse(argc, argv);
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if (stopTime < 10)
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{
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std::cout << "Use a simulation stop time >= 10 seconds" << std::endl;
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exit(1);
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}
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///////////////////////////////////////////////////////////////////////////
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// //
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// Construct the backbone //
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// //
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///////////////////////////////////////////////////////////////////////////
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//
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// Create a container to manage the nodes of the adhoc (backbone) network.
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// Later we'll create the rest of the nodes we'll need.
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//
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NodeContainer backbone;
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backbone.Create(backboneNodes);
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//
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// Create the backbone wifi net devices and install them into the nodes in
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// our container
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//
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WifiHelper wifi;
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WifiMacHelper mac;
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mac.SetType("ns3::AdhocWifiMac");
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wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager",
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"DataMode",
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StringValue("OfdmRate54Mbps"));
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YansWifiPhyHelper wifiPhy;
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wifiPhy.SetPcapDataLinkType(WifiPhyHelper::DLT_IEEE802_11_RADIO);
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YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default();
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wifiPhy.SetChannel(wifiChannel.Create());
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NetDeviceContainer backboneDevices = wifi.Install(wifiPhy, mac, backbone);
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// We enable OLSR (which will be consulted at a higher priority than
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// the global routing) on the backbone ad hoc nodes
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NS_LOG_INFO("Enabling OLSR routing on all backbone nodes");
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OlsrHelper olsr;
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//
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// Add the IPv4 protocol stack to the nodes in our container
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//
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InternetStackHelper internet;
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internet.SetRoutingHelper(olsr); // has effect on the next Install ()
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internet.Install(backbone);
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//
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// Assign IPv4 addresses to the device drivers (actually to the associated
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// IPv4 interfaces) we just created.
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//
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Ipv4AddressHelper ipAddrs;
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ipAddrs.SetBase("192.168.0.0", "255.255.255.0");
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ipAddrs.Assign(backboneDevices);
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//
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// The ad-hoc network nodes need a mobility model so we aggregate one to
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// each of the nodes we just finished building.
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//
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MobilityHelper mobility;
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mobility.SetPositionAllocator("ns3::GridPositionAllocator",
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"MinX",
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DoubleValue(20.0),
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"MinY",
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DoubleValue(20.0),
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"DeltaX",
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DoubleValue(20.0),
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"DeltaY",
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DoubleValue(20.0),
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"GridWidth",
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UintegerValue(5),
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"LayoutType",
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StringValue("RowFirst"));
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mobility.SetMobilityModel("ns3::RandomDirection2dMobilityModel",
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"Bounds",
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RectangleValue(Rectangle(-500, 500, -500, 500)),
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"Speed",
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StringValue("ns3::ConstantRandomVariable[Constant=2]"),
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"Pause",
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StringValue("ns3::ConstantRandomVariable[Constant=0.2]"));
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mobility.Install(backbone);
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///////////////////////////////////////////////////////////////////////////
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// //
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// Construct the LANs //
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// //
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///////////////////////////////////////////////////////////////////////////
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// Reset the address base-- all of the CSMA networks will be in
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// the "172.16 address space
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ipAddrs.SetBase("172.16.0.0", "255.255.255.0");
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for (uint32_t i = 0; i < backboneNodes; ++i)
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{
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NS_LOG_INFO("Configuring local area network for backbone node " << i);
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//
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// Create a container to manage the nodes of the LAN. We need
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// two containers here; one with all of the new nodes, and one
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// with all of the nodes including new and existing nodes
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//
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NodeContainer newLanNodes;
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newLanNodes.Create(lanNodes - 1);
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// Now, create the container with all nodes on this link
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NodeContainer lan(backbone.Get(i), newLanNodes);
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//
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// Create the CSMA net devices and install them into the nodes in our
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// collection.
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//
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CsmaHelper csma;
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csma.SetChannelAttribute("DataRate", DataRateValue(DataRate(5000000)));
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csma.SetChannelAttribute("Delay", TimeValue(MilliSeconds(2)));
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NetDeviceContainer lanDevices = csma.Install(lan);
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//
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// Add the IPv4 protocol stack to the new LAN nodes
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//
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internet.Install(newLanNodes);
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//
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// Assign IPv4 addresses to the device drivers (actually to the
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// associated IPv4 interfaces) we just created.
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//
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ipAddrs.Assign(lanDevices);
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//
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// Assign a new network prefix for the next LAN, according to the
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// network mask initialized above
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//
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ipAddrs.NewNetwork();
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//
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// The new LAN nodes need a mobility model so we aggregate one
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// to each of the nodes we just finished building.
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//
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MobilityHelper mobilityLan;
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Ptr<ListPositionAllocator> subnetAlloc = CreateObject<ListPositionAllocator>();
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for (uint32_t j = 0; j < newLanNodes.GetN(); ++j)
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{
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subnetAlloc->Add(Vector(0.0, j * 10 + 10, 0.0));
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}
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mobilityLan.PushReferenceMobilityModel(backbone.Get(i));
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mobilityLan.SetPositionAllocator(subnetAlloc);
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mobilityLan.SetMobilityModel("ns3::ConstantPositionMobilityModel");
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mobilityLan.Install(newLanNodes);
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}
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///////////////////////////////////////////////////////////////////////////
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// //
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// Construct the mobile networks //
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// //
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///////////////////////////////////////////////////////////////////////////
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// Reset the address base-- all of the 802.11 networks will be in
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// the "10.0" address space
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ipAddrs.SetBase("10.0.0.0", "255.255.255.0");
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for (uint32_t i = 0; i < backboneNodes; ++i)
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{
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NS_LOG_INFO("Configuring wireless network for backbone node " << i);
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//
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// Create a container to manage the nodes of the LAN. We need
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// two containers here; one with all of the new nodes, and one
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// with all of the nodes including new and existing nodes
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//
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NodeContainer stas;
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stas.Create(infraNodes - 1);
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// Now, create the container with all nodes on this link
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NodeContainer infra(backbone.Get(i), stas);
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//
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// Create an infrastructure network
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//
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WifiHelper wifiInfra;
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WifiMacHelper macInfra;
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wifiPhy.SetChannel(wifiChannel.Create());
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// Create unique ssids for these networks
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std::string ssidString("wifi-infra");
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std::stringstream ss;
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ss << i;
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ssidString += ss.str();
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Ssid ssid = Ssid(ssidString);
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// setup stas
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macInfra.SetType("ns3::StaWifiMac", "Ssid", SsidValue(ssid));
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NetDeviceContainer staDevices = wifiInfra.Install(wifiPhy, macInfra, stas);
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// setup ap.
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macInfra.SetType("ns3::ApWifiMac", "Ssid", SsidValue(ssid));
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NetDeviceContainer apDevices = wifiInfra.Install(wifiPhy, macInfra, backbone.Get(i));
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// Collect all of these new devices
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NetDeviceContainer infraDevices(apDevices, staDevices);
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// Add the IPv4 protocol stack to the nodes in our container
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//
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internet.Install(stas);
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//
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// Assign IPv4 addresses to the device drivers (actually to the associated
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// IPv4 interfaces) we just created.
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//
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ipAddrs.Assign(infraDevices);
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//
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// Assign a new network prefix for each mobile network, according to
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// the network mask initialized above
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//
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ipAddrs.NewNetwork();
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//
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// The new wireless nodes need a mobility model so we aggregate one
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// to each of the nodes we just finished building.
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//
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Ptr<ListPositionAllocator> subnetAlloc = CreateObject<ListPositionAllocator>();
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for (uint32_t j = 0; j < infra.GetN(); ++j)
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{
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subnetAlloc->Add(Vector(0.0, j, 0.0));
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}
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mobility.PushReferenceMobilityModel(backbone.Get(i));
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mobility.SetPositionAllocator(subnetAlloc);
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mobility.SetMobilityModel("ns3::RandomDirection2dMobilityModel",
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"Bounds",
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RectangleValue(Rectangle(-10, 10, -10, 10)),
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"Speed",
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StringValue("ns3::ConstantRandomVariable[Constant=3]"),
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"Pause",
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StringValue("ns3::ConstantRandomVariable[Constant=0.4]"));
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mobility.Install(stas);
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}
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///////////////////////////////////////////////////////////////////////////
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// //
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// Application configuration //
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// //
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///////////////////////////////////////////////////////////////////////////
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// Create the OnOff application to send UDP datagrams of size
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// 210 bytes at a rate of 10 Kb/s, between two nodes
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// We'll send data from the first wired LAN node on the first wired LAN
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// to the last wireless STA on the last infrastructure net, thereby
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// causing packets to traverse CSMA to adhoc to infrastructure links
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NS_LOG_INFO("Create Applications.");
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uint16_t port = 9; // Discard port (RFC 863)
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// Let's make sure that the user does not define too few nodes
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// to make this example work. We need lanNodes > 1 and infraNodes > 1
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NS_ASSERT(lanNodes > 1 && infraNodes > 1);
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// We want the source to be the first node created outside of the backbone
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// Conveniently, the variable "backboneNodes" holds this node index value
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Ptr<Node> appSource = NodeList::GetNode(backboneNodes);
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// We want the sink to be the last node created in the topology.
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uint32_t lastNodeIndex =
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backboneNodes + backboneNodes * (lanNodes - 1) + backboneNodes * (infraNodes - 1) - 1;
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Ptr<Node> appSink = NodeList::GetNode(lastNodeIndex);
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// Let's fetch the IP address of the last node, which is on Ipv4Interface 1
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Ipv4Address remoteAddr = appSink->GetObject<Ipv4>()->GetAddress(1, 0).GetLocal();
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OnOffHelper onoff("ns3::UdpSocketFactory", Address(InetSocketAddress(remoteAddr, port)));
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ApplicationContainer apps = onoff.Install(appSource);
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apps.Start(Seconds(3));
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apps.Stop(Seconds(stopTime - 1));
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// Create a packet sink to receive these packets
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PacketSinkHelper sink("ns3::UdpSocketFactory", InetSocketAddress(Ipv4Address::GetAny(), port));
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apps = sink.Install(appSink);
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apps.Start(Seconds(3));
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///////////////////////////////////////////////////////////////////////////
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// //
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// Tracing configuration //
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// //
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///////////////////////////////////////////////////////////////////////////
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NS_LOG_INFO("Configure Tracing.");
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CsmaHelper csma;
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//
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// Let's set up some ns-2-like ascii traces, using another helper class
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//
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AsciiTraceHelper ascii;
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Ptr<OutputStreamWrapper> stream = ascii.CreateFileStream("mixed-wireless.tr");
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wifiPhy.EnableAsciiAll(stream);
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csma.EnableAsciiAll(stream);
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internet.EnableAsciiIpv4All(stream);
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// Csma captures in non-promiscuous mode
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csma.EnablePcapAll("mixed-wireless", false);
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// pcap captures on the backbone wifi devices
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wifiPhy.EnablePcap("mixed-wireless", backboneDevices, false);
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// pcap trace on the application data sink
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wifiPhy.EnablePcap("mixed-wireless", appSink->GetId(), 0);
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if (useCourseChangeCallback)
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{
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Config::Connect("/NodeList/*/$ns3::MobilityModel/CourseChange",
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MakeCallback(&CourseChangeCallback));
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}
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AnimationInterface anim("mixed-wireless.xml");
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///////////////////////////////////////////////////////////////////////////
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// //
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// Run simulation //
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// //
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///////////////////////////////////////////////////////////////////////////
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NS_LOG_INFO("Run Simulation.");
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Simulator::Stop(Seconds(stopTime));
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Simulator::Run();
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Simulator::Destroy();
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return 0;
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}
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