satellite-traced-mobility-model.cc

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2018 CNES
 *
 * 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: Mathias Ettinger <mettinger@toulouse.viveris.com>
 */
 
#include "satellite-traced-mobility-model.h"
 
#include "satellite-position-input-trace-container.h"
 
#include <ns3/enum.h>
#include <ns3/log.h>
#include <ns3/simulator.h>
#include <ns3/singleton.h>
 
NS_LOG_COMPONENT_DEFINE("SatTracedMobilityModel");
 
namespace ns3
{
 
NS_OBJECT_ENSURE_REGISTERED(SatTracedMobilityModel);
 
TypeId
SatTracedMobilityModel::GetTypeId(void)
{
    static TypeId tid =
        TypeId("ns3::SatTracedMobilityModel")
            .SetParent<SatMobilityModel>()
            .AddConstructor<SatTracedMobilityModel>()
            .AddAttribute("ReferenceEllipsoid",
                          "Reference Ellipsoid model to use when reading coordinates",
                          EnumValue(GeoCoordinate::SPHERE),
                          MakeEnumAccessor(&SatTracedMobilityModel::m_refEllipsoid),
                          MakeEnumChecker(GeoCoordinate::SPHERE,
                                          "Sphere",
                                          GeoCoordinate::WGS84,
                                          "WGS84",
                                          GeoCoordinate::GRS80,
                                          "GRS80"))
            .AddAttribute("UpdateInterval",
                          "Interval at which the position should update",
                          TimeValue(MilliSeconds(1)),
                          MakeTimeAccessor(&SatTracedMobilityModel::m_updateInterval),
                          MakeTimeChecker(FemtoSeconds(1)));
 
    return tid;
}
 
TypeId
SatTracedMobilityModel::GetInstanceTypeId(void) const
{
    return GetTypeId();
}
 
void
SatTracedMobilityModel::DoDispose()
{
    m_antennaGainPatterns = NULL;
 
    Object::DoDispose();
}
 
SatTracedMobilityModel::SatTracedMobilityModel()
{
    NS_FATAL_ERROR("SatTracedMobilityModel default constructor should not be used");
}
 
SatTracedMobilityModel::SatTracedMobilityModel(uint32_t satId,
                                               const std::string& filename,
                                               Ptr<SatAntennaGainPatternContainer> agp)
    : m_satId(satId),
      m_traceFilename(filename),
      m_updateInterval(MilliSeconds(1)),
      m_refEllipsoid(GeoCoordinate::SPHERE),
      m_geoPosition(0.0, 0.0, 0.0),
      m_velocity(0.0, 0.0, 0.0),
      m_antennaGainPatterns(agp)
{
    NS_LOG_FUNCTION(this);
 
    UpdateGeoPositionFromFile();
}
 
SatTracedMobilityModel::~SatTracedMobilityModel()
{
    NS_LOG_FUNCTION(this);
}
 
GeoCoordinate
SatTracedMobilityModel::DoGetGeoPosition(void) const
{
    NS_LOG_FUNCTION(this);
 
    return m_geoPosition;
}
 
void
SatTracedMobilityModel::DoSetGeoPosition(const GeoCoordinate& position)
{
    NS_LOG_FUNCTION(this << position);
 
    double time = m_updateInterval.GetSeconds();
    Vector distance = position.ToVector() - m_geoPosition.ToVector();
    m_velocity = Vector(distance.x / time, distance.y / time, distance.z / time);
 
    NS_LOG_INFO("Changing position from " << m_geoPosition << " to " << position << ". Velocity is "
                                          << m_velocity << " (" << m_velocity.GetLength() << ")");
 
    m_geoPosition = position;
    NotifyGeoCourseChange();
}
 
Vector
SatTracedMobilityModel::DoGetVelocity(void) const
{
    NS_LOG_FUNCTION(this);
 
    return m_velocity;
}
 
void
SatTracedMobilityModel::UpdateGeoPositionFromFile(void)
{
    NS_LOG_FUNCTION(this);
 
    GeoCoordinate newPosition =
        Singleton<SatPositionInputTraceContainer>::Get()->GetPosition(m_traceFilename,
                                                                      m_refEllipsoid);
    DoSetGeoPosition(newPosition);
 
    Simulator::Schedule(m_updateInterval, &SatTracedMobilityModel::UpdateGeoPositionFromFile, this);
}
 
uint32_t
SatTracedMobilityModel::GetBestBeamId(void) const
{
    return m_antennaGainPatterns->GetBestBeamId(m_satId, m_geoPosition, false);
}
 
} // namespace ns3