support DefaultValue

src/devices/wifi/propagation-loss-model.cc

@@ -1,16 +1,98 @@
 #include "propagation-loss-model.h"
+#include "ns3/default-value.h"
+#include "ns3/random-variable-default-value.h"
 #include <math.h>
 
 namespace ns3 {
 
+enum ModelType {
+  FRIIS,
+  RANDOM,
+  PATH_LOSS
+};
+
+static EnumDefaultValue<enum ModelType> g_modelType
+("PropagationLossModelType",
+ "The type of propagation loss model.",
+ PATH_LOSS, "PathLoss",
+ FRIIS, "Friis",
+ RANDOM, "Random",
+ 0, (void *)0);
+
+static NumericDefaultValue<double> g_friisLambda
+("FriisPropagationLambda",
+ "The wavelength to use by default for every FriisPropagationLossModel (default is 5.15 GHz at 300 000 km/s).",
+ 300000000.0 / 5.150e9);
+
+static NumericDefaultValue<double> g_friisSystemLoss
+("FriisPropagationSystemLoss",
+ "The system loss to use by default for every FriisPropagationLossModel",
+ 1.0);
+
+static RandomVariableDefaultValue g_random
+("RandomPropagation",
+ "The distribution (in dbm) to choose the propagation loss.",
+ "Constant:1.0");
+
+static NumericDefaultValue<double> g_pathLossExponent
+("PathLossPropagationExponent",
+ "The exponent of the Path Loss propagation model",
+ 3.0);
+
+static EnumDefaultValue<enum ModelType> g_pathLossReference
+("PathLossPropagationReferenceType",
+ "The type of reference propagation model.",
+ FRIIS, "Friis",
+ RANDOM, "Random", 
+ 0, (void *)0);
+
 const double FriisPropagationLossModel::PI = 3.1415;
 
 PropagationLossModel::~PropagationLossModel ()
 {}
 
+Ptr<PropagationLossModel> 
+PropagationLossModel::CreateDefault (void)
+{
+  switch (g_modelType.GetValue ()) {
+  case FRIIS:
+    return Create<FriisPropagationLossModel> ();
+    break;
+  case RANDOM:
+    return Create<RandomPropagationLossModel> ();
+    break;
+  case PATH_LOSS:
+    return Create<PathLossPropagationLossModel> ();
+    break;
+  default:
+    NS_ASSERT (false);
+    return 0;
+    break;
+  }
+}
+
+RandomPropagationLossModel::RandomPropagationLossModel ()
+  : m_variable (g_random.GetCopy ())
+{}
+
+RandomPropagationLossModel::RandomPropagationLossModel (const RandomVariable &variable)
+  : m_variable (variable.Copy ())
+{}
+RandomPropagationLossModel::~RandomPropagationLossModel ()
+{
+  delete m_variable;
+}
+
+double 
+RandomPropagationLossModel::GetRxPower (double txPowerDbm,
+					double distance) const
+{
+  return txPowerDbm - m_variable->GetValue ();
+}
+
 FriisPropagationLossModel::FriisPropagationLossModel ()
-  : m_lambda (),
-    m_systemLoss (1.0)
+  : m_lambda (g_friisLambda.GetValue ()),
+    m_systemLoss (g_friisSystemLoss.GetValue ())
 {}
 void 
 FriisPropagationLossModel::SetSystemLoss (double systemLoss)
@@ -83,6 +165,8 @@ FriisPropagationLossModel::GetRxPower (double txPowerDbm,
 
 
 PathLossPropagationLossModel::PathLossPropagationLossModel ()
+  : m_exponent (g_pathLossExponent.GetValue ()),
+    m_reference (CreateDefaultReference ())
 {}
 
 void 
@@ -90,12 +174,35 @@ PathLossPropagationLossModel::SetPathLossExponent (double n)
 {
   m_exponent = n;
 }
+void 
+PathLossPropagationLossModel::SetReferenceModel (Ptr<PropagationLossModel> model)
+{
+  m_reference = model;
+}
 double 
 PathLossPropagationLossModel::GetPathLossExponent (void) const
 {
   return m_exponent;
 }
 
+Ptr<PropagationLossModel>
+PathLossPropagationLossModel::CreateDefaultReference (void)
+{
+  switch (g_pathLossReference.GetValue ()) {
+  case RANDOM:
+    return Create<RandomPropagationLossModel> ();
+    break;
+  case FRIIS:
+    return Create<FriisPropagationLossModel> ();
+    break;
+  case PATH_LOSS:
+  default:
+    NS_ASSERT (false);
+    return 0;
+    break;
+  }
+}
+
 double
 PathLossPropagationLossModel::DbToW (double db) const
 {

src/devices/wifi/propagation-loss-model.h

@@ -5,12 +5,29 @@
 
 namespace ns3 {
 
+class RandomVariable;
+
 class PropagationLossModel : public Object
 {
 public:
   virtual ~PropagationLossModel ();
   virtual double GetRxPower (double txPowerDbm,
 			     double distance) const = 0;
+
+  static Ptr<PropagationLossModel> CreateDefault (void);
+};
+
+class RandomPropagationLossModel : public PropagationLossModel
+{
+public:
+  RandomPropagationLossModel ();
+  RandomPropagationLossModel (const RandomVariable &variable);
+  virtual ~RandomPropagationLossModel ();
+
+  virtual double GetRxPower (double txPowerDbm,
+			     double distance) const;
+private:
+  RandomVariable *m_variable;
 };
 
 class FriisPropagationLossModel : public PropagationLossModel
@@ -48,8 +65,8 @@ public:
 			     double distance) const;
 private:
   double DbToW (double db) const;
+  static Ptr<PropagationLossModel> CreateDefaultReference (void);
 
-  double m_lambda;
   double m_exponent;
   Ptr<PropagationLossModel> m_reference;
 };