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 *	Engineering Group at Lawrence Berkeley Laboratory.
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 * $Header: /cvsroot/nsnam/ns-2/mac/wireless-phy.h,v 1.15 2007/01/30 05:00:50 tom_henderson Exp $
 *
 * Ported from CMU/Monarch's code, nov'98 -Padma Haldar.
 *
 * wireless-phy.h
 * -- a SharedMedia network interface
 */

#ifndef ns_WirelessPhy_h
#define ns_WirelessPhy_h

#include "propagation.h"
#include "modulation.h"
#include "omni-antenna.h"
#include "phy.h"
#include "mobilenode.h"
#include "timer-handler.h"


class Phy;
class Propagation;
class WirelessPhy;

class Sleep_Timer : public TimerHandler {
 public:
	Sleep_Timer(WirelessPhy *a) : TimerHandler() { a_ = a; }
 protected:
	virtual void expire(Event *e);
	WirelessPhy *a_;
};

//
class WirelessPhy : public Phy {
public:
	WirelessPhy();
	
	void sendDown(Packet *p);
	int sendUp(Packet *p);
	
	inline double getL() const {return L_;}
	inline double getLambda() const {return lambda_;}
	inline Node* node(void) const { return node_; }
	inline double getPtconsume() { return Pt_consume_; }

	double getDist(double Pr, double Pt, double Gt, double Gr, double hr,
		       double ht, double L, double lambda);
  
	virtual int command(int argc, const char*const* argv);
	virtual void dump(void) const;
	
	//void setnode (MobileNode *node) { node_ = node; }
	void node_on();
	void node_off();	

        /* -NEW- */
        inline double getAntennaZ() { return ant_->getZ(); }
        inline double getPt() { return Pt_; }
        inline double getRXThresh() { return RXThresh_; }
        inline double getCSThresh() { return CSThresh_; }
        inline double getFreq() { return freq_; }
        /* End -NEW- */

	void node_sleep();
	void node_wakeup();
	inline bool& Is_node_on() { return node_on_; }
	inline bool Is_sleeping() { if (status_==SLEEP) return(1); else return(0); }
	double T_sleep_;	// 2.31 change: Time at which sleeping is to be enabled (sec)


protected:
	double Pt_;		// transmitted signal power (W)
	double Pt_consume_;	// power consumption for transmission (W)
	double Pr_consume_;	// power consumption for reception (W)
	double P_idle_;         // idle power consumption (W)
	double P_sleep_;	// sleep power consumption (W)
	double P_transition_;	// power consumed when transiting from SLEEP mode to IDLE mode and vice versa.
	double T_transition_;	// time period to transit from SLEEP mode to IDLE mode and vice versa.
//

	double last_send_time_;	// the last time the node sends somthing.
	double channel_idle_time_;	// channel idle time.
	double update_energy_time_;	// the last time we update energy.

	double freq_;           // frequency
	double lambda_;		// wavelength (m)
	double L_;		// system loss factor
  
	double RXThresh_;	// receive power threshold (W)
	double CSThresh_;	// carrier sense threshold (W)
	double CPThresh_;	// capture threshold (db)
        double noise_;          // background noise (W) carmen
  
	Antenna *ant_;
	Propagation *propagation_;	// Propagation Model
	Modulation *modulation_;	// Modulation Schem

	// Why phy has a node_ and this guy has it all over again??
//  	MobileNode* node_;         	// Mobile Node to which interface is attached .

 	enum ChannelStatus { SLEEP, IDLE, RECV, SEND };	
	bool node_on_; // on-off status of this node
	Sleep_Timer sleep_timer_;
	int status_;
    

private:
	inline int initialized() {
		return (node_ && uptarget_ && downtarget_ && propagation_);
	}
	void UpdateIdleEnergy();
	void UpdateSleepEnergy();

	// Convenience method
	EnergyModel* em() { return node()->energy_model(); }

	friend class Sleep_Timer;

};

#endif /* !ns_WirelessPhy_h */