wifi-remote-station-info.h

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/*
 * Copyright (c) 2005,2006,2007 INRIA
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
 */
 
#ifndef WIFI_REMOTE_STATION_INFO_H
#define WIFI_REMOTE_STATION_INFO_H
 
#include "ns3/nstime.h"
#include "ns3/uinteger.h"
 
namespace ns3
{
 
/**
 * \brief TID independent remote station statistics
 *
 * Structure is similar to struct sta_info in Linux kernel (see
 * net/mac80211/sta_info.h)
 */
class WifiRemoteStationInfo
{
  public:
    WifiRemoteStationInfo();
    virtual ~WifiRemoteStationInfo();
 
    /**
     * \brief Updates average frame error rate when data or RTS was transmitted successfully.
     *
     * \param retryCounter is SLRC or SSRC value at the moment of success transmission.
     */
    void NotifyTxSuccess(uint32_t retryCounter);
    /**
     * Updates average frame error rate when final data or RTS has failed.
     */
    void NotifyTxFailed();
    /**
     * Return frame error rate (probability that frame is corrupted due to transmission error).
     * \returns the frame error rate
     */
    double GetFrameErrorRate() const;
 
  private:
    /**
     * \brief Calculate averaging coefficient for frame error rate. Depends on time of the last
     * update.
     *
     * \attention Calling this method twice gives different results,
     * because it resets time of last update.
     *
     * \return average coefficient for frame error rate
     */
    double CalculateAveragingCoefficient();
 
    Time m_memoryTime; ///< averaging coefficient depends on the memory time
    Time m_lastUpdate; ///< when last update has occurred
    double m_failAvg;  ///< moving percentage of failed frames
};
 
} // namespace ns3
 
#endif /* WIFI_REMOTE_STATION_INFO_H */