Fixed geocentric mobility model whose generic position is ECEF. More...

#include "geocentric-ecef-mobility-model.h"

Inheritance diagram for ns3::GeocentricEcefMobilityModel:

Collaboration diagram for ns3::GeocentricEcefMobilityModel:

Public Member Functions
	GeocentricEcefMobilityModel ()=default
	Create a geocentric ECEF mobility model.
	~GeocentricEcefMobilityModel () override=default
	Destructor.
Public Member Functions inherited from ns3::GeocentricConstantPositionMobilityModel
	GeocentricConstantPositionMobilityModel ()=default
	Create a position located at coordinates (0,0,0).
	~GeocentricConstantPositionMobilityModel () override=default
Ptr< MobilityModel >	Copy () const override
	Copy function allows one to copy the underlying MobilityModel from a MobilityModel pointer, by calling each children Copy implementation.
virtual Vector	GetCoordinateTranslationReferencePoint () const
	Get the reference point for coordinate conversion.
double	GetDistanceFrom (Ptr< const GeocentricConstantPositionMobilityModel > other) const
virtual double	GetElevationAngle (Ptr< const GeocentricConstantPositionMobilityModel > other)
	Computes elevation angle between a ground terminal and a HAPS/Satellite.
virtual Vector	GetGeocentricPosition () const
	Get the position using Geocentric Cartesian coordinates.
virtual Vector	GetGeographicPosition () const
	Get the position using geographic (geodetic) coordinates.
virtual Vector	GetPosition () const
virtual void	SetCoordinateTranslationReferencePoint (const Vector &refPoint)
	Set the reference point for coordinate conversion.
virtual void	SetGeocentricPosition (const Vector &position)
	Set the position using Geocentric Cartesian coordinates.
virtual void	SetGeographicPosition (const Vector &latLonAlt)
	Set the position using geographic coordinates.
virtual void	SetPosition (const Vector &position)
Public Member Functions inherited from ns3::MobilityModel
	MobilityModel ()
	~MobilityModel () override=0
int64_t	AssignStreams (int64_t stream)
	Assign a fixed random variable stream number to the random variables used by this model.
double	GetDistanceFrom (Ptr< const MobilityModel > position) const
Vector	GetPosition () const
Vector	GetPositionWithReference (const Vector &referencePosition) const
	This method may be used if the position returned may depend on some reference position provided.
double	GetRelativeSpeed (Ptr< const MobilityModel > other) const
Vector	GetVelocity () const
void	SetPosition (const Vector &position)
Public Member Functions inherited from ns3::Object
	Object ()
	Caller graph was not generated because of its size.
	~Object () override
	Destructor.
void	AggregateObject (Ptr< Object > other)
	Aggregate two Objects together.
void	Dispose ()
	Dispose of this Object.
AggregateIterator	GetAggregateIterator () const
	Get an iterator to the Objects aggregated to this one.
TypeId	GetInstanceTypeId () const final
	Get the most derived TypeId for this Object.
template<>
Ptr< Object >	GetObject () const
	Specialization of () for objects of type ns3::Object.
template<typename T>
Ptr< T >	GetObject () const
	Get a pointer to the requested aggregated Object.
template<>
Ptr< Object >	GetObject (TypeId tid) const
	Specialization of (TypeId tid) for objects of type ns3::Object.
template<typename T>
Ptr< T >	GetObject (TypeId tid) const
	Get a pointer to the requested aggregated Object by TypeId.
void	Initialize ()
	Invoke DoInitialize on all Objects aggregated to this one.
bool	IsInitialized () const
	Check if the object has been initialized.
void	UnidirectionalAggregateObject (Ptr< Object > other)
	Aggregate an Object to another Object.
Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	Default constructor.
uint32_t	GetReferenceCount () const
	Get the reference count of the object.
SimpleRefCount &	operator= (const SimpleRefCount &o)
	Assignment operator.
void	Ref () const
	Increment the reference count.
void	Unref () const
	Decrement the reference count.
Public Member Functions inherited from ns3::ObjectBase
virtual	~ObjectBase ()
	Virtual destructor.
void	GetAttribute (std::string name, AttributeValue &value, bool permissive=false) const
	Get the value of an attribute, raising fatal errors if unsuccessful.
bool	GetAttributeFailSafe (std::string name, AttributeValue &value) const
	Get the value of an attribute without raising errors.
void	SetAttribute (std::string name, const AttributeValue &value)
	Set a single attribute, raising fatal errors if unsuccessful.
bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)
	Set a single attribute without raising errors.
bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)
	Connect a TraceSource to a Callback with a context.
bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
	Connect a TraceSource to a Callback without a context.
bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected with a context.
bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected without a context.

Static Public Member Functions
static TypeId	GetTypeId ()
	Register this type with the TypeId system.
Static Public Member Functions inherited from ns3::GeocentricConstantPositionMobilityModel
static TypeId	GetTypeId ()
	Register this type with the TypeId system.
Static Public Member Functions inherited from ns3::MobilityModel
static TypeId	GetTypeId ()
	Register this type with the TypeId system.
Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId ()
	Register this type.
Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId ()
	Get the type ID.

Private Member Functions
Vector	DoGetPosition () const override
	Override to return ECEF coordinates instead of ENU.

Additional Inherited Members
Public Types inherited from ns3::MobilityModel
typedef void(*	TracedCallback) (Ptr< const MobilityModel > model)
	TracedCallback signature.
Protected Member Functions inherited from ns3::MobilityModel
void	NotifyCourseChange () const
	Must be invoked by subclasses when the course of the position changes to notify course change listeners.
Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
	Copy an Object.
virtual void	DoDispose ()
	Destructor implementation.
virtual void	DoInitialize ()
	Initialize() implementation.
virtual void	NotifyNewAggregate ()
	Notify all Objects aggregated to this one of a new Object being aggregated.
Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
	Complete construction of ObjectBase; invoked by derived classes.
virtual void	NotifyConstructionCompleted ()
	Notifier called once the ObjectBase is fully constructed.
Related Symbols inherited from ns3::ObjectBase
static TypeId	GetObjectIid ()
	Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly.

Detailed Description

Fixed geocentric mobility model whose generic position is ECEF.

This class adapts GeocentricConstantPositionMobilityModel for NTN scenarios where fixed ground nodes and satellite nodes must report positions in the same coordinate frame through the generic MobilityModel API.

GeocentricConstantPositionMobilityModel provides GetGeocentricPosition() for ECEF (Earth-Centered Earth-Fixed) coordinates, but its GetPosition() reports the local topocentric/ENU (East-North-Up) position. LEO satellite mobility models report ECEF coordinates from GetPosition(). Some NR, 3GPP propagation, spectrum, and antenna geometry code queries nodes only through MobilityModel::GetPosition(), so changing those call sites to use GetGeocentricPosition() would require broader API changes.

GeocentricEcefMobilityModel therefore overrides DoGetPosition() so GetPosition() returns the same ECEF coordinates as GetGeocentricPosition(), while retaining the geographic and geocentric accessors from the parent class.

Internal:: TODO: Consider if a unified units/coordinate system framework could eliminate the need for specialized mobility model classes like this one by allowing positions to carry their coordinate system metadata.

Definition at line 43 of file geocentric-ecef-mobility-model.h.

Constructor & Destructor Documentation

◆ GeocentricEcefMobilityModel()

ns3::GeocentricEcefMobilityModel::GeocentricEcefMobilityModel ( )

default

Create a geocentric ECEF mobility model.

Referenced by GetTypeId().

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◆ ~GeocentricEcefMobilityModel()

ns3::GeocentricEcefMobilityModel::~GeocentricEcefMobilityModel ( )

overridedefault

Destructor.

Member Function Documentation

◆ DoGetPosition()

Vector ns3::GeocentricEcefMobilityModel::DoGetPosition ( ) const

overrideprivatevirtual

Override to return ECEF coordinates instead of ENU.

Returns: the position in ECEF (Earth-Centered Earth-Fixed) coordinates

This overrides the parent class's DoGetPosition() which returns ENU coordinates. Instead, this returns the same ECEF coordinates as DoGetGeocentricPosition().

Reimplemented from ns3::GeocentricConstantPositionMobilityModel.

Definition at line 31 of file geocentric-ecef-mobility-model.cc.

References ns3::GeocentricConstantPositionMobilityModel::GetGeocentricPosition(), and NS_LOG_FUNCTION.

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