146 lines
3.4 KiB
C++
146 lines
3.4 KiB
C++
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2009 CTTC
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Nicola Baldo <nbaldo@cttc.es>
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*/
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#include "spectrum-interference.h"
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#include "spectrum-error-model.h"
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#include <ns3/simulator.h>
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#include <ns3/log.h>
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NS_LOG_COMPONENT_DEFINE ("SpectrumInterference");
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namespace ns3 {
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SpectrumInterference::SpectrumInterference ()
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: m_receiving (false),
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m_rxSignal (0),
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m_allSignals (0),
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m_noise (0),
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m_errorModel (0)
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{
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NS_LOG_FUNCTION (this);
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}
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SpectrumInterference::~SpectrumInterference ()
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{
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NS_LOG_FUNCTION (this);
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}
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void
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SpectrumInterference::DoDispose ()
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{
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NS_LOG_FUNCTION (this);
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m_rxSignal = 0;
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m_allSignals = 0;
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m_noise = 0;
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m_errorModel = 0;
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Object::DoDispose ();
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}
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void
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SpectrumInterference::StartRx (Ptr<const Packet> p, Ptr<const SpectrumValue> rxPsd)
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{
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NS_LOG_FUNCTION (this << p << *rxPsd);
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m_rxSignal = rxPsd;
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m_lastChangeTime = Now ();
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m_receiving = true;
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m_errorModel->StartRx (p);
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}
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bool
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SpectrumInterference::EndRx ()
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{
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NS_LOG_FUNCTION (this);
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ConditionallyEvaluateChunk ();
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m_receiving = false;
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return m_errorModel->IsRxCorrect ();
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}
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void
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SpectrumInterference::AddSignal (Ptr<const SpectrumValue> spd, const Time duration)
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{
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NS_LOG_FUNCTION (this << *spd << duration);
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DoAddSignal (spd);
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Simulator::Schedule (duration, &SpectrumInterference::DoSubtractSignal, this, spd);
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}
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void
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SpectrumInterference::DoAddSignal (Ptr<const SpectrumValue> spd)
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{
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NS_LOG_FUNCTION (this << *spd);
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ConditionallyEvaluateChunk ();
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(*m_allSignals) += (*spd);
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m_lastChangeTime = Now ();
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}
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void
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SpectrumInterference::DoSubtractSignal (Ptr<const SpectrumValue> spd)
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{
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NS_LOG_FUNCTION (this << *spd);
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ConditionallyEvaluateChunk ();
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(*m_allSignals) -= (*spd);
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m_lastChangeTime = Now ();
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}
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void
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SpectrumInterference::ConditionallyEvaluateChunk ()
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{
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NS_LOG_FUNCTION (this);
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if (m_receiving && (Now () > m_lastChangeTime))
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{
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SpectrumValue sinr = (*m_rxSignal) / ((*m_allSignals) - (*m_rxSignal) + (*m_noise));
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Time duration = Now () - m_lastChangeTime;
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m_errorModel->EvaluateChunk (sinr, duration);
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}
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}
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void
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SpectrumInterference::SetNoisePowerSpectralDensity (Ptr<const SpectrumValue> noisePsd)
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{
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NS_LOG_FUNCTION (this << noisePsd);
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m_noise = noisePsd;
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// we can initialize m_allSignal only now, because earlier we
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// didn't know what spectrum model was going to be used.
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// we'll now create a zeroed SpectrumValue using the same
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// SpectrumModel which is being specified for the noise.
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m_allSignals = Create<SpectrumValue> (noisePsd->GetSpectrumModel ());
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}
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void
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SpectrumInterference::SetErrorModel (Ptr<SpectrumErrorModel> e)
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{
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NS_LOG_FUNCTION (this << e);
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m_errorModel = e;
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}
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} // namespace ns3
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