wireless-phy.cc

fso antenna model for ns2

	
	// Send the packet
	channel_->recv(p, this);
}

int 
WirelessPhy::sendUp(Packet *p)
{
	/*
	 * Sanity Check
	 */
	assert(initialized());

	PacketStamp s;
	double Pr;
	int pkt_recvd = 0;

	Pr = p->txinfo_.getTxPr();
	
	// if the node is in sleeping mode, drop the packet simply
	if (em()) {
			if (Is_node_on()!= true){
			pkt_recvd = 0;
			goto DONE;
			}

			if (Is_sleeping()==true && (Is_node_on() == true)) {
				pkt_recvd = 0;
				goto DONE;
			}
			
	}
	// if the energy goes to ZERO, drop the packet simply
	if (em()) {
		if (em()->energy() <= 0) {
			pkt_recvd = 0;
			goto DONE;
		}
	}

	if(propagation_) {
		s.stamp((MobileNode*)node(), ant_, 0, lambda_);
		Pr = propagation_->Pr(&p->txinfo_, &s, this);
		if (Pr < CSThresh_) {
			pkt_recvd = 0;
			goto DONE;
		}
		if (Pr < RXThresh_) {
			/*
			 * We can detect, but not successfully receive
			 * this packet.
			 */
			hdr_cmn *hdr = HDR_CMN(p);
			hdr->error() = 1;
#if DEBUG > 3
			printf("SM %f.9 _%d_ drop pkt from %d low POWER %e/%e\n",
			       Scheduler::instance().clock(), node()->index(),
			       p->txinfo_.getNode()->index(),
			       Pr,RXThresh);
#endif
		}
	}
	if(modulation_) {
		hdr_cmn *hdr = HDR_CMN(p);
		hdr->error() = modulation_->BitError(Pr,hdr->size());	// RPI FSO Extension
		// hdr->error() = modulation_->BitError(Pr);
	}
	
	/*
	 * The MAC layer must be notified of the packet reception
	 * now - ie; when the first bit has been detected - so that
	 * it can properly do Collision Avoidance / Detection.
	 */
	pkt_recvd = 1;

DONE:
	p->txinfo_.getAntenna()->release();

	/* WILD HACK: The following two variables are a wild hack.
	   They will go away in the next release...
	   They're used by the mac-802_11 object to determine
	   capture.  This will be moved into the net-if family of 
	   objects in the future. */
	p->txinfo_.RxPr = Pr;
	p->txinfo_.CPThresh = CPThresh_;

	/*
	 * Decrease energy if packet successfully received
	 */
	if(pkt_recvd && em()) {

		double rcvtime = hdr_cmn::access(p)->txtime();
		// no way to reach here if the energy level < 0
		
		double start_time = MAX(channel_idle_time_, NOW);
		double end_time = MAX(channel_idle_time_, NOW+rcvtime);
		double actual_rcvtime = end_time-start_time;

		if (start_time > update_energy_time_) {
			em()->DecrIdleEnergy(start_time-update_energy_time_,
					     P_idle_);
			update_energy_time_ = start_time;
		}
		
		em()->DecrRcvEnergy(actual_rcvtime,Pr_consume_);
/*
  if (end_time > channel_idle_time_) {
  status_ = RECV;
  }
*/
		channel_idle_time_ = end_time;
		update_energy_time_ = end_time;

		status_ = IDLE;

		/*
		  hdr_diff *dfh = HDR_DIFF(p);
		  printf("Node %d receives (%d, %d, %d) energy %lf.\n",
		  node()->address(), dfh->sender_id.addr_, 
		  dfh->sender_id.port_, dfh->pk_num, node()->energy());
		*/

		// log node energy
		if (em()->energy() > 0) {
		((MobileNode *)node_)->log_energy(1);
        	} 

		if (em()->energy() <= 0) {  
			// saying node died
			em()->setenergy(0);
			((MobileNode*)node())->log_energy(0);
		}
	}
	
	return pkt_recvd;
}

void
WirelessPhy::node_on()
{

        node_on_= TRUE;
	status_ = IDLE;

       if (em() == NULL)
 	    return;	
   	if (NOW > update_energy_time_) {
      	    update_energy_time_ = NOW;
   	}
}

void 
WirelessPhy::node_off()
{

        node_on_= FALSE;
	status_ = SLEEP;

	if (em() == NULL)
            return;
        if (NOW > update_energy_time_) {
            em()->DecrIdleEnergy(NOW-update_energy_time_,
                                P_idle_);
            update_energy_time_ = NOW;
	}
}

void 
WirelessPhy::node_wakeup()
{

	if (status_== IDLE)
		return;

	if (em() == NULL)
            return;

        if ( NOW > update_energy_time_ && (status_== SLEEP) ) {
		//the power consumption when radio goes from SLEEP mode to IDLE mode
		em()->DecrTransitionEnergy(T_transition_,P_transition_);
		
		em()->DecrSleepEnergy(NOW-update_energy_time_,
				      P_sleep_);
		status_ = IDLE;
	        update_energy_time_ = NOW;
		
		// log node energy
		if (em()->energy() > 0) {
			((MobileNode *)node_)->log_energy(1);
	        } else {
			((MobileNode *)node_)->log_energy(0);   
	        }
	}
}

void 
WirelessPhy::node_sleep()
{
//
//        node_on_= FALSE;
//
	if (status_== SLEEP)
		return;

	if (em() == NULL)
            return;

        if ( NOW > update_energy_time_ && (status_== IDLE) ) {
	//the power consumption when radio goes from IDLE mode to SLEEP mode
	    em()->DecrTransitionEnergy(T_transition_,P_transition_);

            em()->DecrIdleEnergy(NOW-update_energy_time_,
                                P_idle_);
		status_ = SLEEP;
	        update_energy_time_ = NOW;

	// log node energy
		if (em()->energy() > 0) {
			((MobileNode *)node_)->log_energy(1);
	        } else {
			((MobileNode *)node_)->log_energy(0);   
	        }
	}
}
//
void
WirelessPhy::dump(void) const
{
	Phy::dump();
	fprintf(stdout,
		"\tPt: %f, Gt: %f, Gr: %f, lambda: %f, L: %f\n",
		Pt_, ant_->getTxGain(0,0,0,lambda_), ant_->getRxGain(0,0,0,lambda_), lambda_, L_);
	//fprintf(stdout, "\tbandwidth: %f\n", bandwidth_);
	fprintf(stdout, "--------------------------------------------------\n");
}


void WirelessPhy::UpdateIdleEnergy()
{
	if (em() == NULL) {
		return;
	}
	if (NOW > update_energy_time_ && (Is_node_on()==TRUE && status_ == IDLE ) ) {
		  em()-> DecrIdleEnergy(NOW-update_energy_time_,
					P_idle_);
		  update_energy_time_ = NOW;
	}

	// log node energy
	if (em()->energy() > 0) {
		((MobileNode *)node_)->log_energy(1);
        } else {
		((MobileNode *)node_)->log_energy(0);   
        }

//	idle_timer_.resched(10.0);
}

double WirelessPhy::getDist(double Pr, double Pt, double Gt, double Gr,
			    double hr, double ht, double L, double lambda)
{
	if (propagation_) {
		return propagation_->getDist(Pr, Pt, Gt, Gr, hr, ht, L,
					     lambda);
	}
	return 0;
}

//
void WirelessPhy::UpdateSleepEnergy()
{
	if (em() == NULL) {
		return;
	}
	if (NOW > update_energy_time_ && ( Is_node_on()==TRUE  && Is_sleeping() == true) ) {
		  em()-> DecrSleepEnergy(NOW-update_energy_time_,
					P_sleep_);
		  update_energy_time_ = NOW;
		// log node energy
		if (em()->energy() > 0) {
			((MobileNode *)node_)->log_energy(1);
        	} else {
			((MobileNode *)node_)->log_energy(0);   
        	}
	}
	
	//A hack to make states consistent with those of in Energy Model for AF
	int static s=em()->sleep();
	if(em()->sleep()!=s){

		s=em()->sleep();	
		if(s==1)
			node_sleep();
		else
			node_wakeup();			
		printf("\n AF hack %d\n",em()->sleep());	
	}	
	
	sleep_timer_.resched(10.0);
}

// begin RPI FSO Extension
WirelessPhy::~WirelessPhy()
{
}
// end RPI FSO Extension