lte-interference.h

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/*
 * Copyright (c) 2009 CTTC
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Author: Nicola Baldo <nbaldo@cttc.es>
 */
 
#ifndef LTE_INTERFERENCE_H
#define LTE_INTERFERENCE_H
 
#include <ns3/nstime.h>
#include <ns3/object.h>
#include <ns3/packet.h>
#include <ns3/spectrum-value.h>
 
#include <list>
 
namespace ns3
{
 
class LteChunkProcessor;
 
/**
 * This class implements a gaussian interference model, i.e., all
 * incoming signals are added to the total interference.
 *
 */
class LteInterference : public Object
{
  public:
    LteInterference();
    ~LteInterference() override;
 
    /**
     * \brief Get the type ID.
     * \return the object TypeId
     */
    static TypeId GetTypeId();
    void DoDispose() override;
 
    /**
     * \brief Add a LteChunkProcessor that will use the time-vs-frequency SINR
     * calculated by this LteInterference instance. Note that all the
     * added LteChunkProcessors will work in parallel.
     *
     * @param p
     */
    virtual void AddSinrChunkProcessor(Ptr<LteChunkProcessor> p);
 
    /**
     * \brief Add a LteChunkProcessor that will use the time-vs-frequency
     * interference calculated by this LteInterference instance. Note
     * that all the added LteChunkProcessors will work in parallel.
     *
     * @param p
     */
    virtual void AddInterferenceChunkProcessor(Ptr<LteChunkProcessor> p);
 
    /**
     * Add a LteChunkProcessor that will use the time-vs-frequency
     *  power calculated by this LteInterference instance. Note
     *  that all the added LteChunkProcessors will work in parallel.
     *
     * @param p
     */
    virtual void AddRsPowerChunkProcessor(Ptr<LteChunkProcessor> p);
 
    /**
     * \brief Notify that the PHY is starting a RX attempt
     *
     * @param rxPsd the power spectral density of the signal being RX
     */
    virtual void StartRx(Ptr<const SpectrumValue> rxPsd);
 
    /**
     * notify that the RX attempt has ended. The receiving PHY must call
     * this method when RX ends or RX is aborted.
     *
     */
    virtual void EndRx();
 
    /**
     * notify that a new signal is being perceived in the medium. This
     * method is to be called for all incoming signal, regardless of
     * whether they're useful signals or interferers.
     *
     * @param spd the power spectral density of the new signal
     * @param duration the duration of the new signal
     */
    virtual void AddSignal(Ptr<const SpectrumValue> spd, const Time duration);
 
    /**
     *
     * @param noisePsd the Noise Power Spectral Density in power units
     * (Watt, Pascal...) per Hz.
     */
    virtual void SetNoisePowerSpectralDensity(Ptr<const SpectrumValue> noisePsd);
 
  protected:
    /**
     * Conditionally evaluate chunk
     */
    virtual void ConditionallyEvaluateChunk();
    /**
     * Add signal function
     *
     * @param spd the power spectral density of the new signal
     */
    virtual void DoAddSignal(Ptr<const SpectrumValue> spd);
    /**
     * Subtract signal
     *
     * @param spd the power spectral density of the new signal
     * @param signalId the signal ID
     */
    virtual void DoSubtractSignal(Ptr<const SpectrumValue> spd, uint32_t signalId);
 
    bool m_receiving{false}; ///< are we receiving?
 
    Ptr<SpectrumValue> m_rxSignal{nullptr}; /**< stores the power spectral density of
                                             * the signal whose RX is being
                                             * attempted
                                             */
 
    Ptr<SpectrumValue> m_allSignals{
        nullptr}; /**< stores the spectral
                   * power density of the sum of incoming signals;
                   * does not include noise, includes the SPD of the signal being RX
                   */
 
    Ptr<const SpectrumValue> m_noise{nullptr}; ///< the noise value
 
    Time m_lastChangeTime{Seconds(0)}; /**< the time of the last change in
                                        * m_TotalPower
                                        */
 
    uint32_t m_lastSignalId{0};            ///< the last signal ID
    uint32_t m_lastSignalIdBeforeReset{0}; ///< the last signal ID before reset
 
    /** all the processor instances that need to be notified whenever
    a new interference chunk is calculated */
    std::list<Ptr<LteChunkProcessor>> m_rsPowerChunkProcessorList;
 
    /** all the processor instances that need to be notified whenever
        a new SINR chunk is calculated */
    std::list<Ptr<LteChunkProcessor>> m_sinrChunkProcessorList;
 
    /** all the processor instances that need to be notified whenever
        a new interference chunk is calculated */
    std::list<Ptr<LteChunkProcessor>> m_interfChunkProcessorList;
};
 
} // namespace ns3
 
#endif /* LTE_INTERFERENCE_H */