double
FemtoCellUrbanAreaChannelRealization::GetPathLoss (void)
{
/*
* Path loss Models from sect. 5.2 in
* 3GPP TSG RAN WG4 R4-092042
*
* Alternative simplified model based on LTE-A evaluation methodology which avoids modeling any walls.
*/
double distance;
double minimumCouplingLoss = 45; //[dB] - see 3GPP TSG RAN WG4 #42bis (R4-070456)
double floorPenetration = 0.0;
//18.3 n ((n+2)/(n+1)-0.46)
if (GetSourceNode ()->GetNodeType () == NetworkNode::TYPE_UE
&& ( GetDestinationNode ()->GetNodeType () == NetworkNode::TYPE_ENODEB || GetDestinationNode ()->GetNodeType () == NetworkNode::TYPE_HOME_BASE_STATION) )
{
UserEquipment* ue = (UserEquipment*) GetSourceNode ();
ENodeB* enb = (ENodeB*) GetDestinationNode ();
if( enb->GetCell()->GetCellCenterPosition()->GetCoordinateZ() > 0
&& ue->IsIndoor()
&& enb->GetCell()->GetCellCenterPosition()->GetCoordinateZ() != ue->GetCell()->GetCellCenterPosition()->GetCoordinateZ())
{
int n = (int) abs( enb->GetCell()->GetCellCenterPosition()->GetCoordinateZ() - ue->GetCell()->GetCellCenterPosition()->GetCoordinateZ() );
floorPenetration = 18.3 * pow( n, ((n+2)/(n+1)-0.46));
}
distance = ue->GetMobilityModel ()->GetAbsolutePosition ()->GetDistance (enb->GetMobilityModel ()->GetAbsolutePosition ());
}
else if (GetDestinationNode ()->GetNodeType () == NetworkNode::TYPE_UE
&& ( GetSourceNode ()->GetNodeType () == NetworkNode::TYPE_ENODEB || GetSourceNode ()->GetNodeType () == NetworkNode::TYPE_HOME_BASE_STATION) )
{
UserEquipment* ue = (UserEquipment*) GetDestinationNode ();
ENodeB* enb = (ENodeB*) GetSourceNode ();
if( enb->GetCell()->GetCellCenterPosition()->GetCoordinateZ() > 0
&& ue->IsIndoor()
&& enb->GetCell()->GetCellCenterPosition()->GetCoordinateZ() != ue->GetCell()->GetCellCenterPosition()->GetCoordinateZ())
{
int n = (int) abs( enb->GetCell()->GetCellCenterPosition()->GetCoordinateZ() - ue->GetCell()->GetCellCenterPosition()->GetCoordinateZ() );
floorPenetration = 18.3 * pow( n, ((n+2)/(n+1)-0.46));
}
distance = ue->GetMobilityModel ()->GetAbsolutePosition ()->GetDistance (enb->GetMobilityModel ()->GetAbsolutePosition ());
}
m_pathLoss = max( minimumCouplingLoss, 127 + ( 30 * log10 (distance * 0.001) ) + floorPenetration);
return m_pathLoss;
}
void
Manhattan::UpdatePosition (double timestamp)
{
#ifdef MOBILITY_DEBUG
// cout << "\t START MOBILITY MODEL for "<< GetNodeID () << endl;
#endif
if (GetSpeed () == 0)
{
#ifdef MOBILITY_DEBUG
cout << "\t\t speed = 0 --> position has not been updated!"<< endl;
#endif
return;
}
double timeInterval = timestamp - GetPositionLastUpdate ();
double speedDirection;
UserEquipment *thisNode = NetworkManager::Init ()->GetUserEquipmentByID (GetNodeID ());
Cell *thisCell = thisNode->GetCell ();
NetworkNode *targetNode = thisNode->GetTargetNode ();
#ifdef MOBILITY_DEBUG
cout << "MOBILITY_DEBUG: User ID: " << GetNodeID ()
<< "\n\t Cell ID " <<
NetworkManager::Init()->GetCellIDFromPosition (GetAbsolutePosition()->GetCoordinateX(),
GetAbsolutePosition()->GetCoordinateY())
<< "\n\t Initial Position (X): " << GetAbsolutePosition()->GetCoordinateX()
<< "\n\t Initial Position (Y): " << GetAbsolutePosition()->GetCoordinateY()
<< "\n\t Speed: " << GetSpeed()
<< "\n\t Speed Direction: " << GetSpeedDirection()
<< "\n\t Time Last Update: " << GetPositionLastUpdate()
<< "\n\t Time Interval: " << timeInterval
<< endl;
#endif
#ifdef MOBILITY_DEBUG_TAB
cout << GetNodeID () << " "
<< GetAbsolutePosition()->GetCoordinateX() << " "
<< GetAbsolutePosition()->GetCoordinateY() << " "
<< GetSpeed() << " "
<< GetSpeedDirection() << " "
<< GetPositionLastUpdate() << " "
<< timeInterval << " "
<< "-> ";
#endif
const double pi = 3.14;
// Init speedDirection if its not pointing into the direction of Manhattans Streets
vector<double> directions;
for(int i=0;i<=3;i++) {
directions.push_back(i * 1.57); // 1.57 = 90.0 * ((2.0*pi)/360.0))
}
double newdir;
vector<double>::iterator it;
it = find(directions.begin(), directions.end(), GetSpeedDirection());
if(it == directions.end()) {
newdir = (double)(pi / 2) * round(GetSpeedDirection() * (double)(2 / pi));
if(newdir==6.28) newdir = 0;
SetSpeedDirection(newdir);
#ifdef MOBILITY_DEBUG_TAB
cout << "NEW SPEED-DIRECTION: " << newdir << " -> ";
#endif
}
double shift = timeInterval * (GetSpeed()*(1000.0/3600.0));
CartesianCoordinates *newPosition = new CartesianCoordinates(GetAbsolutePosition()->GetCoordinateX(), GetAbsolutePosition()->GetCoordinateY());
CartesianCoordinates *ENodeBPosition = targetNode->GetMobilityModel ()->GetAbsolutePosition ();
// Init Manhattan grid position
if(fmod(GetAbsolutePosition()->GetCoordinateY(),100)!=0 && fmod(GetAbsolutePosition()->GetCoordinateX(),100)!=0){
CartesianCoordinates *Correction = new CartesianCoordinates();
double distfromEnB = newPosition->GetDistance (ENodeBPosition);
double azim = newPosition->GetPolarAzimut (ENodeBPosition);
//if it was randomly put outside the cell -> shift it inside
if(distfromEnB > (thisCell->GetRadius()*1000)) {
Correction->SetCoordinates((newPosition->GetDistance (ENodeBPosition) - (thisCell->GetRadius()*1000)) * cos(azim),
(newPosition->GetDistance (ENodeBPosition) - (thisCell->GetRadius()*1000)) * sin(azim));
newPosition->SetCoordinates(newPosition->GetCoordinateX() - Correction->GetCoordinateX(),
newPosition->GetCoordinateY() - Correction->GetCoordinateY());
}
delete Correction;
if(GetSpeedDirection()==0 || GetSpeedDirection()==3.14) {
if(newPosition->GetCoordinateY() < 0)
newPosition->SetCoordinateY( ceil( (double)(newPosition->GetCoordinateY() / 100) ) * 100);
else
newPosition->SetCoordinateY( floor( (double)(newPosition->GetCoordinateY() / 100) ) * 100);
}
else {
if(newPosition->GetCoordinateX() < 0)
newPosition->SetCoordinateX( ceil( (double)(newPosition->GetCoordinateX() / 100)) * 100);
else
newPosition->SetCoordinateX( floor( (double)(newPosition->GetCoordinateX() / 100) ) * 100);
}
}
//Shift it
double shift_x = shift * cos(GetSpeedDirection());
double shift_y = shift * sin(GetSpeedDirection());
if(GetSpeedDirection()==0 || GetSpeedDirection()==3.14) {
newPosition->SetCoordinateX(newPosition->GetCoordinateX()+shift_x);
}
else {
newPosition->SetCoordinateY(newPosition->GetCoordinateY()+shift_y);
}
// if a node reaches a crossing, choose new speedDirection
double old_x = abs( ((int)( GetAbsolutePosition()->GetCoordinateX() *1000))/1000.0 ); //cut after 3 decimal places
double new_x = abs( ((int)( newPosition->GetCoordinateX() *1000))/1000.0 );
double old_y = abs( ((int)( GetAbsolutePosition()->GetCoordinateY() *1000))/1000.0 );
double new_y = abs( ((int)( newPosition->GetCoordinateY() *1000))/1000.0 );
double rounded_x = abs( round(old_x/100)*100 );
double rounded_y = abs( round(old_y/100)*100 );
if( ((old_x<rounded_x && rounded_x<=new_x) || (old_x>rounded_x && rounded_x>=new_x)) ||
((old_y<rounded_y && rounded_y<=new_y) || (old_y>rounded_y && rounded_y>=new_y)) ||
(rounded_x==0 && old_x<rounded_x && rounded_x<=new_x) || (rounded_x==0 && old_x>rounded_x && rounded_x>=new_x) ||
(rounded_y==0 && old_y<rounded_y && rounded_y<=new_y) || (rounded_y==0 && old_y>rounded_y && rounded_y>=new_y) )
{
srand ( time(NULL) );
double prob_turn = (rand()%100)*0.01;
if(prob_turn<=0.25) {
speedDirection = GetSpeedDirection() + 1.57; //turn left;
newPosition->SetCoordinates(round(newPosition->GetCoordinateX()),round(newPosition->GetCoordinateY()));
#ifdef MOBILITY_DEBUG_TAB
cout << "TURN LEFT: " << speedDirection << " -> ";
#endif
}
if(prob_turn>0.25 && prob_turn<0.75) {
newPosition->SetCoordinates(round(newPosition->GetCoordinateX()),round(newPosition->GetCoordinateY()) );
speedDirection = GetSpeedDirection();
#ifdef MOBILITY_DEBUG_TAB
cout << "no TURN: straight -> ";
#endif
}
if(prob_turn>=0.75) {
newPosition->SetCoordinates(round(newPosition->GetCoordinateX()),round(newPosition->GetCoordinateY()) );
speedDirection = GetSpeedDirection() - 1.57;
#ifdef MOBILITY_DEBUG_TAB
cout << "TURN RIGHT: " << speedDirection << " -> ";
#endif
}
//Correction if speedDirection €! [0,2pi[
if(speedDirection>=2*pi) speedDirection -= 2*pi;
if(speedDirection<0) speedDirection += 2*pi;
SetSpeedDirection(speedDirection);
}
//If node moves beyond the cell edge
double azimut = newPosition->GetPolarAzimut (ENodeBPosition);
double newDistanceFromTheENodeB = newPosition->GetDistance (ENodeBPosition);
if (newDistanceFromTheENodeB >= (thisCell->GetRadius()*1000))
{
if (GetHandover()== false)
{
newPosition->SetCoordinateX(GetAbsolutePosition()->GetCoordinateX());
newPosition->SetCoordinateY(GetAbsolutePosition()->GetCoordinateY());
speedDirection = GetSpeedDirection() - pi;
#ifdef MOBILITY_DEBUG_TAB
cout << "Moved back to cell: SPEED DIRECTION CHANGE (HO): " << speedDirection << " -> ";
#endif
if(speedDirection<0) speedDirection = speedDirection + 2*pi;
SetSpeedDirection(speedDirection);
}
else if (newPosition->GetDistance(0.0, 0.0) >= GetTopologyBorder ())
{
newPosition->SetCoordinateX(GetAbsolutePosition()->GetCoordinateX());
newPosition->SetCoordinateY(GetAbsolutePosition()->GetCoordinateY());
speedDirection = GetSpeedDirection() - 1.57;
#ifdef MOBILITY_DEBUG_TAB
cout << "Moved back to cell: SPEED DIRECTION CHANGE (TOPOLOGY-BORDER): " << speedDirection << " -> ";
#endif
if(speedDirection<0) speedDirection = speedDirection + 2*pi;
SetSpeedDirection(speedDirection);
}
}
SetAbsolutePosition(newPosition);
SetPositionLastUpdate (timestamp);
#ifdef MOBILITY_DEBUG
cout << "\n\t Final Position (X): " << GetAbsolutePosition()->GetCoordinateX()
<< "\n\t Final Position (Y): " << GetAbsolutePosition()->GetCoordinateY()
<< endl;
#endif
#ifdef MOBILITY_DEBUG_TAB
cout << GetAbsolutePosition()->GetCoordinateX() << " "
<< GetAbsolutePosition()->GetCoordinateY() << " " << GetSpeedDirection()
<< endl;
#endif
delete newPosition;
}