/*

 * Copyright (c) 2010 TELEMATICS LAB, DEE - Politecnico di Bari

 *

 * 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

 *

 * Author: Giuseppe Piro <g.piro@poliba.it>

 */

/*

 * Test for LTE PHY layer in the downlink

 *

 *      /\                                                    +

 *     /--\                                                 __|

 *    /....\                                               |  |

 *   /------\                                              |__|

 *     eNB                                                  UE

 *

 *   SendPacket(Pb)

 *     |

 *     V

 *  |+++++++++++++++++++++++++++++|                |+++++++++++++++++++++++++++++|

 *  |           EnbLtePhy         |                |           EnbLtePhy         |

 *  |+++++++++++++++++++++++++++++|                |+++++++++++++++++++++++++++++|

 *  | SpectrumPhy  | SpectrumPhy  |                | SpectrumPhy  | SpectrumPhy  |

 *  |     dl       |     ul       |                |     dl       |     ul       |

 *  |+++++++++++++++++++++++++++++|                |+++++++++++++++++++++++++++++|

 *     |                                                        |

 *     |                                                        |

 *     V                                                        |

 * StartTx (pb)                                          StartRx(Pb)

 *     |                                                        |

 *     V                                                        |

 *  |+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++|

 *  |                         Downlink Spectrum Channel                           |

 *  |+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++|

 */

#include <ns3/core-module.h>

#include <ns3/network-module.h>

#include <ns3/single-model-spectrum-channel.h>

#include <ns3/log.h>

#include <ns3/mobility-module.h>

#include <ns3/spectrum-helper.h>

#include <ns3/internet-module.h>

#include <ns3/lte-helper.h>

#include <ns3/enb-phy.h>

#include <ns3/ue-phy.h>

#include <ns3/packet-burst.h>

#include <ns3/constant-position-mobility-model.h>

#include <ns3/constant-velocity-mobility-model.h>

#include <iostream>

#include <string>

#include <vector>

NS_LOG_COMPONENT_DEFINE ("TestSimpleLtePhy");

using namespace ns3;

int main (int argc, char** argv)

{

  LteHelper lte;

  lte.EnableLogComponents ();

  // CREATE NODE CONTAINER AND CREATE LTE NODES

  NodeContainer ueNodes;

  NodeContainer enbNodes;

  ueNodes.Create (1);

  enbNodes.Create (1);

  // CREATE DEVICE CONTAINER, INSTALL DEVICE TO NODE

  NetDeviceContainer ueDevs, enbDevs;

  ueDevs = lte.Install (ueNodes, LteHelper::DEVICE_TYPE_USER_EQUIPMENT);

  enbDevs = lte.Install (enbNodes, LteHelper::DEVICE_TYPE_ENODEB);

  // INSTALL INTERNET STACKS

  InternetStackHelper stack;

  stack.Install (ueNodes);

  stack.Install (enbNodes);

  Ipv4AddressHelper address;

  address.SetBase ("10.1.1.0", "255.255.255.0");

  Ipv4InterfaceContainer UEinterfaces = address.Assign (ueDevs);

  Ipv4InterfaceContainer ENBinterface = address.Assign (enbDevs);

  // MANAGE LTE NET DEVICES

  Ptr<EnbNetDevice> enb;

  enb = enbDevs.Get (0)->GetObject<EnbNetDevice> ();

  Ptr<UeNetDevice> ue = ueDevs.Get (0)->GetObject<UeNetDevice> ();

  lte.RegisterUeToTheEnb (ue, enb);

  // CONFIGURE DL and UL SUB CHANNELS

  // Define a list of sub channels for the downlink

  std::vector<int> dlSubChannels;

  for (int i = 0; i < 25; i++)

    {

      dlSubChannels.push_back (i);

    }

  // Define a list of sub channels for the uplink

  std::vector<int> ulSubChannels;

  for (int i = 50; i < 100; i++)

    {

      ulSubChannels.push_back (i);

    }

  enb->GetPhy ()->SetDownlinkSubChannels (dlSubChannels);

  enb->GetPhy ()->SetUplinkSubChannels (ulSubChannels);

  ue->GetPhy ()->SetDownlinkSubChannels (dlSubChannels);

  ue->GetPhy ()->SetUplinkSubChannels (ulSubChannels);

  // CONFIGURE MOBILITY

  Ptr<ConstantPositionMobilityModel> enbMobility = CreateObject<ConstantPositionMobilityModel> ();

  enbMobility->SetPosition (Vector (0.0, 0.0, 0.0));

  lte.AddMobility (enb->GetPhy (), enbMobility);

  Ptr<ConstantVelocityMobilityModel> ueMobility = CreateObject<ConstantVelocityMobilityModel> ();

  ueMobility->SetPosition (Vector (30.0, 0.0, 0.0));

  ueMobility->SetVelocity (Vector (30.0, 0.0, 0.0));

  lte.AddMobility (ue->GetPhy (), ueMobility);

  lte.AddDownlinkChannelRealization (enbMobility, ueMobility, ue->GetPhy ());

  // ****** simulate a packet transmission in the downlink ******

  Ptr<PacketBurst> pb = CreateObject<PacketBurst> ();

  Ptr<Packet> p1 = Create<Packet> (500);

  Ptr<Packet> p2 = Create<Packet> (500);

  pb->AddPacket (p1);

  pb->AddPacket (p2);

  enb->GetPhy ()->SendPacket (pb);

  Simulator::Stop (Seconds (.1));

  Simulator::Run ();

  Simulator::Destroy ();

  return 0;

}