网络仿真工具NS3的培训文档课件

ns-3TrainingComputerandCommunicationNetworkLabDepartmentofElectricalEngineeringNationalSunYat-SenUniversity5/13/2013ns-3TrainingTopicsGettingStartedns-3Whatisns-3?InstallationAFirstns-3ScriptTwotutorialexamplesAsimpleexampleforthisprojectCompletetheremainingparts2TopicsGettingStartedns-32GettingStartedns-3GettingStartedns-3Whatisns-3?ns-3isadiscrete-eventnetworksimulatorforInternetsystemsns-3allowsresearcherstostudyInternetprotocolsandlarge-scalesystemsinacontrolledenvironmentns-3isanewsimulator(notbackwards-compatiblewithns-2)ns-3isafree,opensourcesoftwareprojectorganizedaroundresearchcommunitydevelopmentandmaintenancethetargetusercommunityisnetworkingresearchersandeducators4Whatisns-3?ns-3isadiscretExtensibleSoftwareCore5ExtensibleSoftwareCore5NodeBasicsAnns-3Nodeisahuskofacomputertowhichapplications,stacks,andNICsareadded6NodeBasicsAnns-3NodeisahTracingandStatisticsTracingisastructuredformofsimulationoutputExample(fromns-2):Problem:Tracingneedsvarywidelywouldliketochangetracingoutputwithouteditingthecorewouldliketosupportmultipleoutputs7TracingandStatisticsTracingns-3HasANewTracingModelns-3solution:decoupletracesourcesfromtracesinksBenefit:Customizabletracesinks8ns-3HasANewTracingModelnsDownloadingns-39Downloadingns-39ProblemsunderWindowsCygwinorMinGWIfyoudouseCygwinorMinGWanduseLogitechproductsitcancauseCygwinorMinGWDLLstodieinmysteriouswayNotethatNSCisnotsupportedonOSXorCygwin.NetworkSimulationCradle10ProblemsunderWindowsCygwinoBuildingns-3(1/5)11#./build.pyBuildingns-3(1/5)11#./buildBuildingns-3(2/5)12#./waf-doptimizedconfigurens-3usesthewafbuildsystemBuildingns-3(2/5)12#./waf-Buildingns-3(3/5)13#./waf-ddebugconfigureBuildingns-3(3/5)13#./waf-Buildingns-3(4/5)14#./test.py-ccoreBuildingns-3(4/5)14#./test.Buildingns-3(5/5)15Buildingns-3(5/5)15RunningaScript16./waf--runhello-simulatorRunningaScript16./waf--runBuildingYourScript17#cpexamples/tutorial/first.ccscratch/myfirst.cc./wafBuildingYourScript17#cpexaBuildingYourScript18#./waf--runscratch/myfirstBuildingYourScript18#./wafAFirstns-3Script/ns-allinone-3.10/ns-3.10/examples/tutorialfirst.ccthird.ccAFirstns-3Script/ns-allinoBoilerplateThefirstlineinthefileisanemacsmodeline.

Thens-3simulatorislicensedusingtheGNUGeneralPublicLicense.

20BoilerplateThefirstlineintModuleIncludesThecodeproperstartswithanumberofincludestatements.

../../build/debug/ns321ModuleIncludesThecodeproperNs3NamespaceThenextlineinthefirst.ccscriptisanamespacedeclaration.

Logging

22Ns3NamespaceThenextlineinMainFunctionsThenextlinesofthescriptyouwillfindare,

23ns3提供的log訊息分成了以下幾個等級：NS_LOG_ERROR—Logerrormessages;NS_LOG_WARN—Logwarningmessages;NS_LOG_DEBUG—Logrelativelyrare,ad-hocdebuggingmessages;NS_LOG_INFO—Loginformationalmessagesaboutprogramprogress;NS_LOG_FUNCTION—Logamessagedescribingeachfunctioncalled;NS_LOG_LOGIC–Logmessagesdescribinglogicalflowwithinafunction;NS_LOG_ALL—Logeverything.NS_LOG_UNCOND–Logtheassociatedmessageunconditionally.MainFunctionsThenextlinesoTopologyHelpersCreatethens-3Nodeobjectsthatwillrepresentthecomputersinthesimulation.

Weareconstructingapointtopointlink

24TopologyHelpersCreatethens-TopologyHelpersWewillneedtohavealistofalloftheNetDeviceobjectsthatarecreated

25TopologyHelpersWewillneedtInternetStackHelperProtocolstacksinstalledonournodes

TCP,UDP,IP,etc.Ipv4AddressHelper

maketheassociationbetweenanIPaddressandadevice26InternetStackHelperProtocolApplicationsTwospecializationsofthecorens-3classApplicationcalledUdpEchoServerApplicationUdpEchoClientApplicationUdpEchoServerHelper

27ApplicationsTwospecializationApplicationsUdpEchoClientHelper

28ApplicationsUdpEchoClientHelpeSimulatorWhatweneedtodoatthispointistoactuallyrunthesimulation.

scheduledeventsinthesimulatorat1.0seconds,2.0secondsandtwoeventsat10.0seconds

29SimulatorWhatweneedtodoatBuildingYourScriptDropyourscriptintothescratchdirectory

Nowbuildyourfirstexamplescriptusingwaf

30BuildingYourScriptDropyourBuildingYourScriptYoucannowruntheexample

31BuildingYourScriptYoucannoBuildingaWirelessNetworkTopologyAddtheWifiandthemobilitymodules

Thenetworktopologyillustrationfollows:32BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyForenablingordisablingloggingcomponentsandforchangingthenumberofdevicescreated

33BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyPartoftheWifinetwork

ConfigurethePHYandchannelhelpers

YetAnotherNetworkSimulatorM.LacageandT.R.Henderson,“YetAnotherNetworkSimulator,”WNS2ns-2:TheIPNetworkSimulator,Italy,2006./files/wns2-yans.pdf34BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyCreateachannelobjectandassociateittoourPHYlayerobjectmanager

NqosWifiMacHelperobjecttosetMACparameters

ratecontrolalgorithmAARF(AdaptiveAuto-RateFallback)algorithm35BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyTheSSIDoftheinfrastructurenetwork

Createthewifidevicesofthesestations

36BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyConfiguretheAP(accesspoint)node

SharesthesamesetofPHY-levelAttributes(andchannel)asthestations

37BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologySetsomeAttributescontrollingthe“positionallocator”functionality

38Thenumberofobjectslayedoutonaline.BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyNeedtotellthemhowtomoveRandomWalk2dMobilityModelrandomdirectionrandomspeed

Rectangle(double_xMin,double_xMax,double_yMin,double_yMax)

39BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyWanttheaccesspointtoremaininafixedpositionduringthesimulation

Protocolstacks

40BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyassignIPaddressestothedeviceinterfaces

41BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyEnableinternetworkrouting

Createjustenoughtracingtocoverallthreenetworks

42BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyRunthesimulation,cleanupandthenexittheprogram

Output

43BuildingaWirelessNetworkToReadthepcapfiles

44Readthepcapfiles44Plotfigures

45Plotfigures45AnExampleofMANETReference/ns-allinone-3.10/ns-3.10/examples/wireless/wifi-hidden-terminal.ccAnExampleofMANETReferenceCodes(1/7)47Codes(1/7)47Codes(2/7)48Codes(2/7)48Codes(3/7)49Codes(3/7)49Codes(4/7)50Codes(4/7)50Codes(5/7)51Codes(5/7)51Codes(6/7)52Codes(6/7)52Codes(7/7)53Codes(7/7)53Result54Result54Needtodo……(1/3)Transmissionrangeofanodens3::RangePropagationLossModelMaxRangeNodemovingspeedns3::RandomWaypointMobilityModelSpeedPauseNodedataratens3::ConstantRateWifiManager55Needtodo……(1/3)TransmissionNeedtodo……(2/3)RTSretrylimitns3::UanMacRcRetryRateBuffersizens3::TcpSocketSndBufSizeAODVhelloperiodsns3::aodv::RoutingProtocolHelloInterval56Needtodo……(2/3)RTSretryliNeedtodo……(3/3)Uniformdistributioninasquarewith500metersns3::RandomRectanglePositionAllocator

ns3::UniformVariable57Needtodo……(3/3)UniformdistQ&A58Q&A58演讲完毕，谢谢观看！演讲完毕，谢谢观看！ns-3TrainingComputerandCommunicationNetworkLabDepartmentofElectricalEngineeringNationalSunYat-SenUniversity5/13/2013ns-3TrainingTopicsGettingStartedns-3Whatisns-3?InstallationAFirstns-3ScriptTwotutorialexamplesAsimpleexampleforthisprojectCompletetheremainingparts61TopicsGettingStartedns-32GettingStartedns-3GettingStartedns-3Whatisns-3?ns-3isadiscrete-eventnetworksimulatorforInternetsystemsns-3allowsresearcherstostudyInternetprotocolsandlarge-scalesystemsinacontrolledenvironmentns-3isanewsimulator(notbackwards-compatiblewithns-2)ns-3isafree,opensourcesoftwareprojectorganizedaroundresearchcommunitydevelopmentandmaintenancethetargetusercommunityisnetworkingresearchersandeducators63Whatisns-3?ns-3isadiscretExtensibleSoftwareCore64ExtensibleSoftwareCore5NodeBasicsAnns-3Nodeisahuskofacomputertowhichapplications,stacks,andNICsareadded65NodeBasicsAnns-3NodeisahTracingandStatisticsTracingisastructuredformofsimulationoutputExample(fromns-2):Problem:Tracingneedsvarywidelywouldliketochangetracingoutputwithouteditingthecorewouldliketosupportmultipleoutputs66TracingandStatisticsTracingns-3HasANewTracingModelns-3solution:decoupletracesourcesfromtracesinksBenefit:Customizabletracesinks67ns-3HasANewTracingModelnsDownloadingns-368Downloadingns-39ProblemsunderWindowsCygwinorMinGWIfyoudouseCygwinorMinGWanduseLogitechproductsitcancauseCygwinorMinGWDLLstodieinmysteriouswayNotethatNSCisnotsupportedonOSXorCygwin.NetworkSimulationCradle69ProblemsunderWindowsCygwinoBuildingns-3(1/5)70#./build.pyBuildingns-3(1/5)11#./buildBuildingns-3(2/5)71#./waf-doptimizedconfigurens-3usesthewafbuildsystemBuildingns-3(2/5)12#./waf-Buildingns-3(3/5)72#./waf-ddebugconfigureBuildingns-3(3/5)13#./waf-Buildingns-3(4/5)73#./test.py-ccoreBuildingns-3(4/5)14#./test.Buildingns-3(5/5)74Buildingns-3(5/5)15RunningaScript75./waf--runhello-simulatorRunningaScript16./waf--runBuildingYourScript76#cpexamples/tutorial/first.ccscratch/myfirst.cc./wafBuildingYourScript17#cpexaBuildingYourScript77#./waf--runscratch/myfirstBuildingYourScript18#./wafAFirstns-3Script/ns-allinone-3.10/ns-3.10/examples/tutorialfirst.ccthird.ccAFirstns-3Script/ns-allinoBoilerplateThefirstlineinthefileisanemacsmodeline.

Thens-3simulatorislicensedusingtheGNUGeneralPublicLicense.

79BoilerplateThefirstlineintModuleIncludesThecodeproperstartswithanumberofincludestatements.

../../build/debug/ns380ModuleIncludesThecodeproperNs3NamespaceThenextlineinthefirst.ccscriptisanamespacedeclaration.

Logging

81Ns3NamespaceThenextlineinMainFunctionsThenextlinesofthescriptyouwillfindare,

82ns3提供的log訊息分成了以下幾個等級：NS_LOG_ERROR—Logerrormessages;NS_LOG_WARN—Logwarningmessages;NS_LOG_DEBUG—Logrelativelyrare,ad-hocdebuggingmessages;NS_LOG_INFO—Loginformationalmessagesaboutprogramprogress;NS_LOG_FUNCTION—Logamessagedescribingeachfunctioncalled;NS_LOG_LOGIC–Logmessagesdescribinglogicalflowwithinafunction;NS_LOG_ALL—Logeverything.NS_LOG_UNCOND–Logtheassociatedmessageunconditionally.MainFunctionsThenextlinesoTopologyHelpersCreatethens-3Nodeobjectsthatwillrepresentthecomputersinthesimulation.

Weareconstructingapointtopointlink

83TopologyHelpersCreatethens-TopologyHelpersWewillneedtohavealistofalloftheNetDeviceobjectsthatarecreated

84TopologyHelpersWewillneedtInternetStackHelperProtocolstacksinstalledonournodes

TCP,UDP,IP,etc.Ipv4AddressHelper

maketheassociationbetweenanIPaddressandadevice85InternetStackHelperProtocolApplicationsTwospecializationsofthecorens-3classApplicationcalledUdpEchoServerApplicationUdpEchoClientApplicationUdpEchoServerHelper

86ApplicationsTwospecializationApplicationsUdpEchoClientHelper

87ApplicationsUdpEchoClientHelpeSimulatorWhatweneedtodoatthispointistoactuallyrunthesimulation.

scheduledeventsinthesimulatorat1.0seconds,2.0secondsandtwoeventsat10.0seconds

88SimulatorWhatweneedtodoatBuildingYourScriptDropyourscriptintothescratchdirectory

Nowbuildyourfirstexamplescriptusingwaf

89BuildingYourScriptDropyourBuildingYourScriptYoucannowruntheexample

90BuildingYourScriptYoucannoBuildingaWirelessNetworkTopologyAddtheWifiandthemobilitymodules

Thenetworktopologyillustrationfollows:91BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyForenablingordisablingloggingcomponentsandforchangingthenumberofdevicescreated

92BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyPartoftheWifinetwork

ConfigurethePHYandchannelhelpers

YetAnotherNetworkSimulatorM.LacageandT.R.Henderson,“YetAnotherNetworkSimulator,”WNS2ns-2:TheIPNetworkSimulator,Italy,2006./files/wns2-yans.pdf93BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyCreateachannelobjectandassociateittoourPHYlayerobjectmanager

NqosWifiMacHelperobjecttosetMACparameters

ratecontrolalgorithmAARF(AdaptiveAuto-RateFallback)algorithm94BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyTheSSIDoftheinfrastructurenetwork

Createthewifidevicesofthesestations

95BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyConfiguretheAP(accesspoint)node

SharesthesamesetofPHY-levelAttributes(andchannel)asthestations

96BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologySetsomeAttributescontrollingthe“positionallocator”functionality

97Thenumberofobjectslayedoutonaline.BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyNeedtotellthemhowtomoveRandomWalk2dMobilityModelrandomdirectionrandomspeed

Rectangle(double_xMin,double_xMax,double_yMin,double_yMax)

98BuildingaWirelessNetworkToBuildingaWirelessNetworkTopologyWanttheaccesspointto