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;
}
double
WinnerDownlinkChannelRealization::GetPathLoss (void)
{
/*
* Path Loss Model For Indoor Environment.
* "WINNER II channel models, ver 1.1, Tech Report"
* PL = A*log10(r) + B + C*log10(fc/5) + X; [r in meters; fc in GHz]
* I = 128.1 – 2GHz
* X depends on the number of walls in between
* FL = 17 + 4 (Nfloors - 1) --- floor loss
*/
double distance;
UserEquipment* ue;
ENodeB* enb;
assert (GetDestinationNode ()->GetNodeType () == NetworkNode::TYPE_HOME_BASE_STATION || GetSourceNode ()->GetNodeType () == NetworkNode::TYPE_HOME_BASE_STATION);
if (GetSourceNode ()->GetNodeType () == NetworkNode::TYPE_UE
&& GetDestinationNode ()->GetNodeType () == NetworkNode::TYPE_HOME_BASE_STATION )
{
ue = (UserEquipment*) GetSourceNode ();
enb = (ENodeB*) GetDestinationNode ();
distance = ue->GetMobilityModel ()->GetAbsolutePosition ()->GetDistance (enb->GetMobilityModel ()->GetAbsolutePosition ());
}
else if (GetDestinationNode ()->GetNodeType () == NetworkNode::TYPE_UE
&& GetSourceNode ()->GetNodeType () == NetworkNode::TYPE_HOME_BASE_STATION )
{
ue = (UserEquipment*) GetDestinationNode ();
enb = (ENodeB*) GetSourceNode ();
distance = ue->GetMobilityModel ()->GetAbsolutePosition ()->GetDistance (enb->GetMobilityModel ()->GetAbsolutePosition ());
}
int* nbWalls = GetWalls( (Femtocell*) (enb->GetCell()), ue);
double A, B, C;
double ExternalWallsAttenuation = 20.0;
double InternalWallsAttenuation = 10.0;
if (nbWalls[0] == 0 && nbWalls[1] == 0)
{ //LOS
A = 18.7;
B = 46.8;
C = 20.0;
}
else
{ //NLOS
A = 20.0;
B = 46.4;
C = 20.0;
}
m_pathLoss = A * log10( distance ) +
B +
C * log10(2. / 5.0) +
InternalWallsAttenuation * nbWalls[1] +
ExternalWallsAttenuation * nbWalls[0];
delete [] nbWalls;
return m_pathLoss;
}