/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* 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>
*/
#include <cmath>
#include <ns3/log.h>
#include "jakes-fading-loss-model.h"
#include <ns3/simulator.h>
#include <stdint.h>
#include "stdlib.h"
#include "lte-phy.h"
#include <ns3/mobility-model.h>
#include "JakesTraces/multipath_v0_M6.h"
#include "JakesTraces/multipath_v0_M8.h"
#include "JakesTraces/multipath_v0_M10.h"
#include "JakesTraces/multipath_v0_M12.h"
#include "JakesTraces/multipath_v3_M6.h"
#include "JakesTraces/multipath_v3_M8.h"
#include "JakesTraces/multipath_v3_M10.h"
#include "JakesTraces/multipath_v3_M12.h"
#include "JakesTraces/multipath_v30_M6.h"
#include "JakesTraces/multipath_v30_M8.h"
#include "JakesTraces/multipath_v30_M10.h"
#include "JakesTraces/multipath_v30_M12.h"
#include "JakesTraces/multipath_v120_M6.h"
#include "JakesTraces/multipath_v120_M8.h"
#include "JakesTraces/multipath_v120_M10.h"
#include "JakesTraces/multipath_v120_M12.h"
NS_LOG_COMPONENT_DEFINE ("JakesFadingLossModel");
namespace ns3 {
NS_OBJECT_ENSURE_REGISTERED (JakesFadingLossModel);
JakesFadingLossModel::JakesFadingLossModel ()
: m_nbOfPaths (1, 4),
m_startJakes (1, 2000),
m_phy (0)
{
NS_LOG_FUNCTION (this);
SetSamplingPeriod (0.5); // default value
}
TypeId
JakesFadingLossModel::GetTypeId (void)
{
static TypeId tid = TypeId ("ns3::JakesFadingLossModel")
.SetParent<DiscreteTimeLossModel> ()
.AddConstructor<JakesFadingLossModel> ()
;
return tid;
}
JakesFadingLossModel::~JakesFadingLossModel ()
{
m_phy = 0;
}
void
JakesFadingLossModel::SetPhy (Ptr<LtePhy> phy)
{
NS_LOG_FUNCTION (this);
m_phy = phy;
SetValue ();
}
Ptr<LtePhy>
JakesFadingLossModel::GetPhy (void)
{
NS_LOG_FUNCTION (this);
return m_phy;
}
void
JakesFadingLossModel::SetValue (void)
{
NS_LOG_FUNCTION (this);
m_multipath.clear ();
int downlinkSubChannels = GetPhy ()->GetDownlinkSubChannels ().size ();
Ptr<MobilityModel> mobility = GetPhy ()->GetDownlinkSpectrumPhy ()->GetMobility ()->GetObject<MobilityModel> ();
Vector speedVector = mobility->GetVelocity ();
double speed = sqrt (pow (speedVector.x,2) + pow (speedVector.y,2));
NS_LOG_FUNCTION (this << mobility << speedVector << speed);
/*
* Several 3GPP standards propose a simulation scenario to use duirng the
* LTE performance evaluation. In particular they suggest to consider these
* user speeds: 0, 3, 30, 120 km/h. To this aim, we should map user speed
* into one of the suggested values.
*/
if (speed < 3.)
{
speed = 0;
}
else if (speed < 30.)
{
speed = 3.;
}
else if (speed < 120.)
{
speed = 30.;
}
else
{
speed = 120;
}
NS_LOG_FUNCTION (this << mobility << speedVector << speed);
/*
* Jackes Model.
* Jakes popularised a model for Rayleigh fading based on summing sinusoids
* William C. Jakes, Editor (February 1, 1975).
* Microwave Mobile Communications.
* New York: John Wiley & Sons Inc. ISBN 0-471-43720-4
*/
// number of path = M
// x = 1 -> M=6, x = 2 -> M=8, x = 3 -> M=10, x = 4 -> M=12
int x = static_cast<int> (m_nbOfPaths.GetValue ());
for (int i = 0; i < downlinkSubChannels; i++)
{
// StartJakes allow us to select a window of 0.5ms into the Jakes realization lasting 3s.
int startJakes = static_cast<int> (m_startJakes.GetValue ());
MultipathForTimeDomain multipathForTimeDomain;
if (x == 1)
{
// SELECTED 6 MULTIPLE PATH FOR JAKES MODEL
if (speed == 0)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M6_v_0 [j + startJakes]);
}
}
if (speed == 3)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M6_v_3 [j + startJakes]);
}
}
if (speed == 30)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M6_v_30 [j + startJakes]);
}
}
if (speed == 120)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M6_v_120 [j + startJakes]);
}
}
}
else if (x == 2)
{
// SELECTED 6 MULTIPLE PATH FOR JAKES MODEL
if (speed == 0)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M8_v_0 [j + startJakes]);
}
}
if (speed == 3)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M8_v_3 [j + startJakes]);
}
}
if (speed == 30)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M8_v_30 [j + startJakes]);
}
}
if (speed == 120)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M8_v_120 [j + startJakes]);
}
}
}
else if (x == 3)
{
// SELECTED 6 MULTIPLE PATH FOR JAKES MODEL
if (speed == 0)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M10_v_0 [j + startJakes]);
}
}
if (speed == 3)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M10_v_3 [j + startJakes]);
}
}
if (speed == 30)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M10_v_30 [j + startJakes]);
}
}
if (speed == 120)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M10_v_120 [j + startJakes]);
}
}
}
else if (x == 4)
{
// SELECTED 6 MULTIPLE PATH FOR JAKES MODEL
if (speed == 0)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M12_v_0 [j + startJakes]);
}
}
if (speed == 3)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M12_v_3 [j + startJakes]);
}
}
if (speed == 30)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M12_v_30 [j + startJakes]);
}
}
if (speed == 120)
{
for (int j = 0; j < 500; j++)
{
multipathForTimeDomain.push_back (multipath_M12_v_120 [j + startJakes]);
}
}
}
else
{
std::cout << " ERROR: Jaks's Model, incorrect M value" << std::endl;
}
m_multipath.push_back (multipathForTimeDomain);
}
SetLastUpdate ();
}
double
JakesFadingLossModel::GetValue (int subChannel)
{
NS_LOG_FUNCTION (this);
if (NeedForUpdate ())
{
SetValue ();
SetLastUpdate ();
}
int now_ms = static_cast<int> (Simulator::Now ().GetSeconds () * 1000);
int lastUpdate_ms = static_cast<int> (GetLastUpdate ().GetSeconds () * 1000);
int index = now_ms - lastUpdate_ms;
NS_LOG_FUNCTION (this << subChannel << now_ms
<< lastUpdate_ms << index << m_multipath.at (subChannel).at (index));
return m_multipath.at (subChannel).at (index);
}
} // namespace ns3