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BuildingsPropagationLossModel: added internal wall loss

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This commit is contained in:
Nicola Baldo
2012-02-14 16:44:27 +01:00
parent 2b0d48f9a9
commit 699e3b34c1
2 changed files with 30 additions and 19 deletions
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42
src/buildings/model/buildings-propagation-loss-model.cc
View File

@@ -139,7 +139,12 @@ BuildingsPropagationLossModel::GetTypeId (void)
MakeEnumAccessor (&BuildingsPropagationLossModel::SetCitySize),
MakeEnumChecker (BuildingsPropagationLossModel::Small, "Small",
BuildingsPropagationLossModel::Medium, "Medium",
BuildingsPropagationLossModel::Large, "Large"));
BuildingsPropagationLossModel::Large, "Large"))
.AddAttribute ("InternalWallLoss",
"Additional loss for each internal wall [dB]",
DoubleValue (5.0),
MakeDoubleAccessor (&BuildingsPropagationLossModel::m_lossInternalWall),
MakeDoubleChecker<double> ());
return tid;
@@ -551,7 +556,7 @@ BuildingsPropagationLossModel::ItuR1238 (Ptr<BuildingsMobilityModel> a, Ptr<Buil
double
BuildingsPropagationLossModel::BEWPL (Ptr<BuildingsMobilityModel> a) const
BuildingsPropagationLossModel::ExternalWallLoss (Ptr<BuildingsMobilityModel> a) const
{
double loss = 0.0;
Ptr<Building> aBuilding = a->GetBuilding ();
@@ -571,14 +576,11 @@ BuildingsPropagationLossModel::BEWPL (Ptr<BuildingsMobilityModel> a) const
{
loss = 12;
}
return (loss);
}
double
BuildingsPropagationLossModel::HeightGain (Ptr<BuildingsMobilityModel> node) const
BuildingsPropagationLossModel::HeightLoss (Ptr<BuildingsMobilityModel> node) const
{
double loss = 0.0;
@@ -587,8 +589,14 @@ BuildingsPropagationLossModel::HeightGain (Ptr<BuildingsMobilityModel> node) con
return (loss);
}
double
BuildingsPropagationLossModel::InternalWallsLoss (Ptr<BuildingsMobilityModel> a, Ptr<BuildingsMobilityModel>b) const
{
// approximate the number of internal walls with the Manhattan distance in "rooms" units
double dx = abs (a->GetRoomNumberX () - b->GetRoomNumberX ());
double dy = abs (a->GetRoomNumberY () - b->GetRoomNumberY ());
return m_lossInternalWall * (dx+dy);
}
double
BuildingsPropagationLossModel::GetLoss (Ptr<MobilityModel> a, Ptr<MobilityModel> b) const
@@ -660,7 +668,7 @@ BuildingsPropagationLossModel::GetLoss (Ptr<MobilityModel> a, Ptr<MobilityModel>
if (distance < m_itu1411DistanceThreshold)
{
// short range communication
loss = ItuR1411 (a1, b1) + BEWPL (b1) + HeightGain (a1);
loss = ItuR1411 (a1, b1) + ExternalWallLoss (b1) + HeightLoss (a1);
NS_LOG_INFO (this << " 0-I (>1000): down rooftop -> ITUR1411 : " << loss);
}
else
@@ -673,13 +681,13 @@ BuildingsPropagationLossModel::GetLoss (Ptr<MobilityModel> a, Ptr<MobilityModel>
else
{
// Over the rooftop tranmission -> Okumura Hata
loss = OkumuraHata (a1, b1) + BEWPL (b1);
loss = OkumuraHata (a1, b1) + ExternalWallLoss (b1);
NS_LOG_INFO (this << " O-I (>1000): Over the rooftop -> OH : " << loss);
}
}
else
{
loss = ItuR1411 (a1, b1) + BEWPL (b1) + HeightGain (b1);
loss = ItuR1411 (a1, b1) + ExternalWallLoss (b1) + HeightLoss (b1);
NS_LOG_INFO (this << " 0-I (<1000) ITUR1411 + BEL : " << loss);
}
} // end b1->isIndoor ()
@@ -692,14 +700,14 @@ BuildingsPropagationLossModel::GetLoss (Ptr<MobilityModel> a, Ptr<MobilityModel>
if (a1->GetBuilding () == b1->GetBuilding ())
{
// nodes are in same building -> indoor communication ITU-R P.1238
loss = ItuR1238 (a1, b1);
NS_LOG_INFO (this << " I-I (same building) ITUR1238 : " << loss);
loss = ItuR1238 (a1, b1) + InternalWallsLoss (a1, b1);
NS_LOG_INFO (this << " I-I (same building) ITUR1238 + internal walls: " << loss);
}
else
{
// nodes are in different buildings
loss = ItuR1411 (a1, b1) + BEWPL (a1) + BEWPL (b1);
loss = ItuR1411 (a1, b1) + ExternalWallLoss (a1) + ExternalWallLoss (b1);
NS_LOG_INFO (this << " I-I (different) ITUR1238 + 2*BEL : " << loss);
}
}
@@ -716,7 +724,7 @@ BuildingsPropagationLossModel::GetLoss (Ptr<MobilityModel> a, Ptr<MobilityModel>
if (distance < m_itu1411DistanceThreshold)
{
// short range communication
loss = ItuR1411 (a1, b1) + BEWPL (a1) + HeightGain (a1);
loss = ItuR1411 (a1, b1) + ExternalWallLoss (a1) + HeightLoss (a1);
NS_LOG_INFO (this << " I-O (>1000): down rooftop -> ITUR1411 : " << loss);
}
else
@@ -729,13 +737,13 @@ BuildingsPropagationLossModel::GetLoss (Ptr<MobilityModel> a, Ptr<MobilityModel>
else
{
// above rooftop -> OH
loss = OkumuraHata (a1, b1) + BEWPL (a1) + HeightGain (a1);
loss = OkumuraHata (a1, b1) + ExternalWallLoss (a1) + HeightLoss (a1);
NS_LOG_INFO (this << " =I-O (>1000) over rooftop OH + BEL + HG: " << loss);
}
}
else
{
loss = ItuR1411 (a1, b1) + BEWPL (a1) + HeightGain (a1);
loss = ItuR1411 (a1, b1) + ExternalWallLoss (a1) + HeightLoss (a1);
NS_LOG_INFO (this << " I-O (<1000) ITUR1411 + BEL + HG: " << loss);
}
} // end b1->IsIndoor ()

7
src/buildings/model/buildings-propagation-loss-model.h
View File

@@ -102,9 +102,10 @@ private:
double ItuR1411NlosOverRooftop (Ptr<BuildingsMobilityModel> a, Ptr<BuildingsMobilityModel> b) const;
// double ItuR1411NlosStreetCanyons (Ptr<BuildingsMobilityModel> a, Ptr<BuildingsMobilityModel> b) const;
double ItuR1238 (Ptr<BuildingsMobilityModel> a, Ptr<BuildingsMobilityModel> b) const;
double BEWPL (Ptr<BuildingsMobilityModel> a) const;
double HeightGain (Ptr<BuildingsMobilityModel> n) const;
double ExternalWallLoss (Ptr<BuildingsMobilityModel> a) const;
double HeightLoss (Ptr<BuildingsMobilityModel> n) const;
double InternalWallsLoss (Ptr<BuildingsMobilityModel> a, Ptr<BuildingsMobilityModel> b) const;
double C; // OH loss coefficient for the environment
double N; // ITU-R P.1238: power loss coefficient
@@ -120,7 +121,9 @@ private:
double m_streetsWidth; // in meters
double m_buildingsExtend; // in meters
double m_buildingSeparation; // in meters
double m_lossInternalWall; // in meters
class ShadowingLoss
{
public: