rtt-estimator.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NFD_DAEMON_FW_RTT_ESTIMATOR_HPP
#define NFD_DAEMON_FW_RTT_ESTIMATOR_HPP

#include "core/common.hpp"

namespace nfd {

class RttEstimator
{
public:
  typedef time::microseconds Duration;

  static Duration
  getInitialRtt(void)
  {
    return time::seconds(1);
  }

  RttEstimator(uint16_t maxMultiplier = 16,
               Duration minRto = time::milliseconds(1),
               double gain = 0.1);

  void
  addMeasurement(Duration measure);

  void
  incrementMultiplier();

  void
  doubleMultiplier();

  Duration
  computeRto() const;

private:
  uint16_t m_maxMultiplier;
  double m_minRto;

  double m_rtt;
  double m_gain;
  double m_variance;
  uint16_t m_multiplier;
  uint32_t m_nSamples;
};

} // namespace nfd

#endif // NFD_DAEMON_FW_RTT_ESTIMATOR_HPP