Random direction mobility model. More...

#include "random-direction-2d-mobility-model.h"

Inheritance diagram for ns3::RandomDirection2dMobilityModel:

Collaboration diagram for ns3::RandomDirection2dMobilityModel:

Public Member Functions
	RandomDirection2dMobilityModel ()

	~RandomDirection2dMobilityModel () override

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 ()
	Constructor.

	~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 override
	Get the most derived TypeId for this Object.

template<typename T >
Ptr< T >	GetObject () const
	Get a pointer to the requested aggregated Object.

template<>
Ptr< Object >	GetObject () const
	Specialization of () 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.

template<>
Ptr< Object >	GetObject (TypeId tid) const
	Specialization of (TypeId tid) for objects of type ns3::Object.

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.

	SimpleRefCount (const SimpleRefCount &o)
	Copy 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::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
void	BeginPause ()
	Pause, cancel currently scheduled event, schedule end of pause event.

int64_t	DoAssignStreams (int64_t) override
	The default implementation does nothing but return the passed-in parameter.

void	DoDispose () override
	Destructor implementation.

Vector	DoGetPosition () const override

Vector	DoGetVelocity () const override

void	DoInitialize () override
	Initialize() implementation.

void	DoInitializePrivate ()
	Sets a new random direction and calls SetDirectionAndSpeed.

void	DoSetPosition (const Vector &position) override

void	ResetDirectionAndSpeed ()
	Set a new direction and speed.

void	SetDirectionAndSpeed (double direction)
	Set new velocity and direction, and schedule next pause event.

Private Attributes
Rectangle	m_bounds
	the 2D bounding area

Ptr< UniformRandomVariable >	m_direction
	rv to control direction

EventId	m_event
	event ID of next scheduled event

ConstantVelocityHelper	m_helper
	helper for velocity computations

Ptr< RandomVariableStream >	m_pause
	a random variable to control pause

Ptr< RandomVariableStream >	m_speed
	a random variable to control speed

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	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

Random direction mobility model.

The movement of objects is based on random directions: each object pauses for a specific delay, chooses a random direction and speed and then travels in the specific direction until it reaches one of the boundaries of the model. When it reaches the boundary, it pauses, and selects a new direction and speed.

Definition at line 34 of file random-direction-2d-mobility-model.h.

Constructor & Destructor Documentation

◆ RandomDirection2dMobilityModel()

ns3::RandomDirection2dMobilityModel::RandomDirection2dMobilityModel ( )

Definition at line 51 of file random-direction-2d-mobility-model.cc.

References ns3::CreateObject(), and m_direction.

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◆ ~RandomDirection2dMobilityModel()

ns3::RandomDirection2dMobilityModel::~RandomDirection2dMobilityModel ( )

override

Definition at line 56 of file random-direction-2d-mobility-model.cc.

References ns3::EventId::Cancel(), and m_event.

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Member Function Documentation

◆ BeginPause()

void ns3::RandomDirection2dMobilityModel::BeginPause ( )

private

Pause, cancel currently scheduled event, schedule end of pause event.

Definition at line 83 of file random-direction-2d-mobility-model.cc.

References ns3::EventId::Cancel(), ns3::RandomVariableStream::GetValue(), m_event, m_helper, m_pause, ns3::MobilityModel::NotifyCourseChange(), ns3::ConstantVelocityHelper::Pause(), ResetDirectionAndSpeed(), ns3::Simulator::Schedule(), ns3::Seconds(), and ns3::ConstantVelocityHelper::Update().

Referenced by SetDirectionAndSpeed().

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◆ DoAssignStreams()

int64_t ns3::RandomDirection2dMobilityModel::DoAssignStreams ( int64_t start )

overrideprivatevirtual

The default implementation does nothing but return the passed-in parameter.

Subclasses using random variables are expected to override this.

Parameters

start starting stream index

Returns: the number of streams used

Reimplemented from ns3::MobilityModel.

Definition at line 171 of file random-direction-2d-mobility-model.cc.

References m_direction, m_pause, m_speed, and ns3::RandomVariableStream::SetStream().

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◆ DoDispose()

void ns3::RandomDirection2dMobilityModel::DoDispose ( )

overrideprivatevirtual

Destructor implementation.

This method is called by Dispose() or by the Object's destructor, whichever comes first.

Subclasses are expected to implement their real destruction code in an overridden version of this method and chain up to their parent's implementation once they are done. i.e, for simplicity, the destructor of every subclass should be empty and its content should be moved to the associated DoDispose() method.

It is safe to call GetObject() from within this method.

Reimplemented from ns3::Object.

Definition at line 62 of file random-direction-2d-mobility-model.cc.

References ns3::Object::DoDispose().

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◆ DoGetPosition()

Vector ns3::RandomDirection2dMobilityModel::DoGetPosition ( ) const

overrideprivatevirtual

Returns: the current position.

Concrete subclasses of this base class must implement this method.

Implements ns3::MobilityModel.

Definition at line 150 of file random-direction-2d-mobility-model.cc.

References ns3::ConstantVelocityHelper::GetCurrentPosition(), m_bounds, m_helper, and ns3::ConstantVelocityHelper::UpdateWithBounds().

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◆ DoGetVelocity()

Vector ns3::RandomDirection2dMobilityModel::DoGetVelocity ( ) const

overrideprivatevirtual

Returns: the current velocity.

Concrete subclasses of this base class must implement this method.

Implements ns3::MobilityModel.

Definition at line 165 of file random-direction-2d-mobility-model.cc.

References ns3::ConstantVelocityHelper::GetVelocity(), and m_helper.

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◆ DoInitialize()

void ns3::RandomDirection2dMobilityModel::DoInitialize ( )

overrideprivatevirtual

Initialize() implementation.

This method is called only once by Initialize(). If the user calls Initialize() multiple times, DoInitialize() is called only the first time.

Subclasses are expected to override this method and chain up to their parent's implementation once they are done. It is safe to call GetObject() and AggregateObject() from within this method.

Reimplemented from ns3::Object.

Definition at line 69 of file random-direction-2d-mobility-model.cc.

References ns3::Object::DoInitialize(), and DoInitializePrivate().

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