lr-wpan-interference-helper.cc

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/*
 * Copyright (c) 2013 Fraunhofer FKIE
 *
 * 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:
 *  Sascha Alexander Jopen <jopen@cs.uni-bonn.de>
 */
#include "lr-wpan-interference-helper.h"
 
#include <ns3/log.h>
#include <ns3/spectrum-model.h>
#include <ns3/spectrum-value.h>
 
namespace ns3
{
 
NS_LOG_COMPONENT_DEFINE("LrWpanInterferenceHelper");
 
LrWpanInterferenceHelper::LrWpanInterferenceHelper(Ptr<const SpectrumModel> spectrumModel)
    : m_spectrumModel(spectrumModel),
      m_dirty(false)
{
    m_signal = Create<SpectrumValue>(m_spectrumModel);
}
 
LrWpanInterferenceHelper::~LrWpanInterferenceHelper()
{
    m_spectrumModel = nullptr;
    m_signal = nullptr;
    m_signals.clear();
}
 
bool
LrWpanInterferenceHelper::AddSignal(Ptr<const SpectrumValue> signal)
{
    NS_LOG_FUNCTION(this << signal);
 
    bool result = false;
 
    if (signal->GetSpectrumModel() == m_spectrumModel)
    {
        result = m_signals.insert(signal).second;
        if (result && !m_dirty)
        {
            *m_signal += *signal;
        }
    }
    return result;
}
 
bool
LrWpanInterferenceHelper::RemoveSignal(Ptr<const SpectrumValue> signal)
{
    NS_LOG_FUNCTION(this << signal);
 
    bool result = false;
 
    if (signal->GetSpectrumModel() == m_spectrumModel)
    {
        result = (m_signals.erase(signal) == 1);
        if (result)
        {
            m_dirty = true;
        }
    }
    return result;
}
 
void
LrWpanInterferenceHelper::ClearSignals()
{
    NS_LOG_FUNCTION(this);
 
    m_signals.clear();
    m_dirty = true;
}
 
Ptr<SpectrumValue>
LrWpanInterferenceHelper::GetSignalPsd() const
{
    NS_LOG_FUNCTION(this);
 
    if (m_dirty)
    {
        // Sum up the current interference PSD.
        m_signal = Create<SpectrumValue>(m_spectrumModel);
        for (auto it = m_signals.begin(); it != m_signals.end(); ++it)
        {
            *m_signal += *(*it);
        }
        m_dirty = false;
    }
 
    return m_signal->Copy();
}
 
} // namespace ns3