lte-chunk-processor.h

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/*
 * Copyright (c) 2009, 2010 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
 *
 * 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: Nicola Baldo <nbaldo@cttc.es>
 * Modified by : Marco Miozzo <mmiozzo@cttc.es>
 *        (move from CQI to Ctrl and Data SINR Chunk processors)
 * Modified by : Piotr Gawlowicz <gawlowicz.p@gmail.com>
 *        (removed all Lte***ChunkProcessor implementations
 *        and created generic LteChunkProcessor)
 */
 
#ifndef LTE_CHUNK_PROCESSOR_H
#define LTE_CHUNK_PROCESSOR_H
 
#include <ns3/nstime.h>
#include <ns3/object.h>
#include <ns3/ptr.h>
 
namespace ns3
{
 
class SpectrumValue;
 
/// Chunk processor callback typedef
typedef Callback<void, const SpectrumValue&> LteChunkProcessorCallback;
 
/**
 * This abstract class is used to process the time-vs-frequency
 * SINR/interference/power chunk of a received LTE signal
 * which was calculated by the LteInterference object.
 */
class LteChunkProcessor : public SimpleRefCount<LteChunkProcessor>
{
  public:
    LteChunkProcessor();
    virtual ~LteChunkProcessor();
 
    /**
     * \brief Add callback to list
     *
     * This function adds callback c to list. Each callback pass
     * calculated value to its object and is called in
     * LteChunkProcessor::End().
     *
     * \param c callback function
     */
    virtual void AddCallback(LteChunkProcessorCallback c);
 
    /**
     * \brief Clear internal variables
     *
     * This function clears internal variables in the beginning of
     * calculation
     */
    virtual void Start();
 
    /**
     * \brief Collect SpectrumValue and duration of signal
     *
     * Passed values are collected in m_sumValues and m_totDuration variables.
     *
     * \param sinr the SINR
     * \param duration the duration
     */
    virtual void EvaluateChunk(const SpectrumValue& sinr, Time duration);
 
    /**
     * \brief Finish calculation and inform interested objects about calculated value
     *
     * During this function all callbacks from list are executed
     * to inform interested object about calculated value. This
     * function is called at the end of calculation.
     */
    virtual void End();
 
  private:
    Ptr<SpectrumValue> m_sumValues; ///< sum values
    Time m_totDuration;             ///< total duration
 
    std::vector<LteChunkProcessorCallback>
        m_lteChunkProcessorCallbacks; ///< chunk processor callback
};
 
/**
 * A sink to be plugged to the callback of LteChunkProcessor allowing
 * to save and later retrieve the latest reported value
 *
 */
class LteSpectrumValueCatcher
{
  public:
    /**
     * function to be plugged to LteChunkProcessor::AddCallback ()
     *
     * \param value
     */
    void ReportValue(const SpectrumValue& value);
 
    /**
     *
     *
     * \return the latest value reported by the LteChunkProcessor
     */
    Ptr<SpectrumValue> GetValue();
 
  private:
    Ptr<SpectrumValue> m_value; ///< spectrum value
};
 
} // namespace ns3
 
#endif /* LTE_CHUNK_PROCESSOR_H */