NS3 LTE网络仿真程序， 含LTE无线接入网与EPC

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#include"ns3/core-module.h"
#include"ns3/network-module.h"
#include"ns3/mobility-module.h"
#include"ns3/lte-module.h"
#include"ns3/lte-helper.h"
#include"ns3/epc-helper.h"
#include"ns3/ipv4-global-routing-helper.h"
#include"ns3/config-store.h"
#include"ns3/internet-module.h"
#include"ns3/point-to-point-module.h"
#include"ns3/applications-module.h"
/*
* create an LTE simulation with EPC
*/
using namespace ns3;
NS_LOG_COMPONENT_DEFINE("EpcFirstExample");
int main(int argc,char*argv[]){
uint16_t numOfNode=2;
double simTime=1.1;
double distance=60.0;
double interPacketInterval=100;
//加入命令行以方便修改参数
CommandLine cmd;
cmd.AddValue("numOfNode","Number of eNodes +UE pairs",numOfNode);
cmd.AddValue("simTime","Total duration of the simulation [s]",simTime);
cmd.AddValue("distance","Distance between eNBs [m]",distance);
cmd.AddValue("interPacketInterval","Inter packet interval [ms]",interPacketInterval);
cmd.Parse(argc,argv);
ConfigStore inputConfig;
inputConfig.ConfigureDefaults();
cmd.Parse(argc,argv);
//create a ltehelper object
epc object
Ptr<LteHelper> lte=CreateObject<LteHelper>();
Ptr<PointToPointEpcHelper> epc=CreateObject<PointToPointEpcHelper>();
//告诉ltehelper epc将会使用
lte->SetEpcHelper(epc);
//epchelper 自动创建和配置Pgw节点，下一步需要将pgw与其他IPV4网络如Internet连接
Ptr<Node> pgw=epc->GetPgwNode();
//创建一个romotehost节点并安装协议栈
NodeContainer remoteHostContainer;
remoteHostContainer.Create(1);
Ptr<Node> remoteHost=remoteHostContainer.Get(0);
InternetStackHelper internet;
internet.Install(remoteHostContainer);//创建一个remoteHost,遵循internet协议
//pgw remoteHost 安装P2P2设备
PointToPointHelper p2ph;
p2ph.SetDeviceAttribute("DataRate",DataRateValue(DataRate("100Gb/s")));
p2ph.SetDeviceAttribute("Mtu",UintegerValue(1500));//最大传输单元
p2ph.SetChannelAttribute("Delay",TimeValue(Seconds(0.010)));
NetDeviceContainer internetDevice=p2ph.Install(pgw,remoteHost);
//pgw remoteHost分配IP地址
Ipv4AddressHelper ipv4h;
ipv4h.SetBase("1.0.0.0","255.0.0.0");
Ipv4InterfaceContainer internetIpIface=ipv4h.Assign(internetDevice);//创建网络
Ipv4Address remoteHostAddr=internetIpIface.GetAddress(1);//接口0 是localhost 接口1是 p2p device
//remoteHost 怎么才能路由到Ue，利用UE默认在公共网络7.0.0.0
Ipv4StaticRoutingHelper ipv4RoutingHelper;
Ptr<Ipv4StaticRouting> remoteHostStaticRouting=ipv4RoutingHelper.GetStaticRouting(remoteHost->GetObject<Ipv4>());
remoteHostStaticRouting->AddNetworkRouteTo(Ipv4Address("7.0.0.0"),Ipv4Mask("255.0.0.0"),1);
//为UE eNB创建节点
NodeContainer enbNodes;
enbNodes.Create(numOfNode);
NodeContainer ueNodes;
ueNodes.Create(numOfNode);
//为节点配置移动模型
Ptr<ListPositionAllocator> positionAlloc=CreateObject<ListPositionAllocator>();
for (uint16_t i=0;i<numOfNode;i++)
positionAlloc->Add(Vector(distance*i,0,0));//初始位置(distance*i,0,0)
MobilityHelper mobility;
mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
mobility.SetPositionAllocator(positionAlloc);
mobility.Install(enbNodes);
//mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
mobility.Install(ueNodes);
//装载LTE设备及信道
NetDeviceContainer enbdevice;
enbdevice=lte->InstallEnbDevice(enbNodes);
NetDeviceContainer uedevice;
uedevice=lte->InstallUeDevice(ueNodes);
//这里不再是LTE-ONLY，需要将LTE连接IP 分配IP地址给UE
internet.Install(ueNodes);//安装IP协议栈在UE节点
Ipv4InterfaceContainer ueIpIface;
ueIpIface=epc->AssignUeIpv4Address(NetDeviceContainer(uedevice));
//
for(uint32_t u=0;u<ueNodes.GetN();++u)
{Ptr<Node> ue=ueNodes.Get(u);
Ptr<Ipv4StaticRouting> ueStaticRouting=ipv4RoutingHelper.GetStaticRouting(ue->GetObject<Ipv4>());//为UE设置默认网关
ueStaticRouting->SetDefaultRoute(epc->GetUeDefaultGatewayAddress(),1);
}
//关联UE 和基站eNB，根据eNB配置来配置每一个UE并创建UE-ENB之间的RRC连接
for(uint16_t i=0;i<numOfNode;i++)
{
lte->Attach(uedevice.Get(i),enbdevice.Get(i));//默认EPS承载将激活
}
//含有EPC时ActivateDataRadioBearer不用了
/*//激活EPS承载包括UE-ENB之间的无线承载
enum EpsBearer::Qci q=EpsBearer::GBR_CONV_VOICE;
EpsBearer bearer(q);
lte->ActivateDataRadioBearer(uedevice,bearer);*/
//改用默认EPS承载（由LteHelper::Attcah()自动激活）或者专用EPS承载（LteHelper::ActivateDedicatedEpsBearer()）
Ptr<EpcTft> tft=Create<EpcTft>();
EpcTft::PacketFilter pf;
pf.localPortStart=1234;
pf.localPortEnd=1234;
tft->Add(pf);
lte->ActivateDedicatedEpsBearer(uedevice,EpsBearer(EpsBearer::NGBR_VIDEO_TCP_DEFAULT),tft);
//最后是在UE节点安装应用（与远程应用程序通信）
//下面是一个UdpClient APP 建立在远程客户端 下行
uint16_t dl_port=1234;
uint16_t ul_port=2000;
uint16_t other_port=3000;
ApplicationContainer clientApps;
ApplicationContainer serverApps;
for(uint32_t u=0;u<ueNodes.GetN();++u){
++ul_port;++other_port;
PacketSinkHelper dlPacketSinkHelper("ns3::UdpSocketFactory",InetSocketAddress(Ipv4Address::GetAny(),dl_port));
PacketSinkHelper ulPacketSinkHelper("ns3::UdpSocketFactory",InetSocketAddress(Ipv4Address::GetAny(),ul_port));
PacketSinkHelper packetSinkHelper("ns3::UdpSocketFactory",InetSocketAddress(Ipv4Address::GetAny(),other_port));
serverApps.Add(dlPacketSinkHelper.Install(ueNodes.Get(u)));
serverApps.Add(ulPacketSinkHelper.Install(remoteHost));
serverApps.Add(packetSinkHelper.Install(ueNodes.Get(u)));
UdpClientHelper dlClient (ueIpIface.GetAddress(u),dl_port);
dlClient.SetAttribute("Interval",TimeValue(MilliSeconds(interPacketInterval)));
dlClient.SetAttribute("MaxPackets",UintegerValue(1000000));
UdpClientHelper ulClient (remoteHostAddr,ul_port);
ulClient.SetAttribute("Interval",TimeValue(MilliSeconds(interPacketInterval)));
ulClient.SetAttribute("MaxPackets",UintegerValue(1000000));
UdpClientHelper Client (ueIpIface.GetAddress(u),other_port);
Client.SetAttribute("Interval",TimeValue(MilliSeconds(interPacketInterval)));
Client.SetAttribute("MaxPackets",UintegerValue(1000000));
clientApps.Add(dlClient.Install(remoteHost));
clientApps.Add(ulClient.Install(ueNodes.Get(u)));
if(u+1<ueNodes.GetN()){
clientApps.Add(Client.Install(ueNodes.Get(u+1)));
}
else
clientApps.Add(Client.Install(ueNodes.Get(0)));//第一个节点运行
}
//设置仿真参数
serverApps.Start(Seconds(0.01));
clientApps.Start(Seconds(0.01));
lte->EnableTraces();
//p2ph.EnablePcapAll("lte-epc-first");
Simulator::Stop(Seconds(simTime));
Simulator::Run();
Simulator::Destroy();
return 0;
}