/* -*- mode:c++ -*- ********************************************************
 * file:        AsyncSnrDecider.h
 *
 * author:      Yupeng.hu
 *
 * copyright:   (C) 2006 HUNAN Universtiy, ChangSha China
 *
 ***************************************************************************
 * part of:     Async Simulation
 * description: - Async Description
 *
 ***************************************************************************
 * changelog:   $Revision$
 *              last modified:   $Date: 2006-7-3 10:21 $
 *              by:              $Author: Yupeng.hu $
 ***************************************************************************/


#ifndef SYNCSNR_DECIDER_H
#define SYNCSNR_DECIDER_H

#include <BasicDecider.h>

/**
   \brief a simple snr decider...

   This decider simply takes a look at the sduList contained in the
   received PhySDU packet and checks whether one of the mentioned snr
   levels is lower than the snrThresholdLevel which has to be read in at
   the beginning of a simulation. (suggestion: from the omnetpp.ini
   file!)

   
*/
class AsyncSnrDecider : public BasicDecider {

    Module_Class_Members( AsyncSnrDecider, BasicDecider, 0 );

 protected:
    /**
       \brief Level for decision

       When a packet contains an snr level lower than
       snrThresholdLevel it will be considered as lost. This
       parameter has to be specified in the beginning of a simulation
       (omnetpp.ini) in dBm.
    */
    double snrThresholdLevel; /** \brief in mW */

 public:
    virtual void initialize(int);

 protected:
    bool snrOverThreshold(SnrList &) const;
    virtual void handleLowerMsg(AirFrame*, SnrList &);
};

#endif