Waypoint-based mobility model. More...

#include "waypoint-mobility-model.h"

Inheritance diagram for ns3::WaypointMobilityModel:

Collaboration diagram for ns3::WaypointMobilityModel:

Public Member Functions
	WaypointMobilityModel ()
	Create a path with no waypoints at location (0,0,0).

	~WaypointMobilityModel () override

void	AddWaypoint (const Waypoint &waypoint)

void	EndMobility ()
	Clear any existing waypoints and set the current waypoint time to infinity.

Waypoint	GetNextWaypoint () const
	Get the waypoint that this object is traveling towards.

uint32_t	WaypointsLeft () const
	Get the number of waypoints left for this object, excluding the next one.

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.

Protected Attributes
Waypoint	m_current
	The ns3::Waypoint currently being used.

EventId	m_event
	Update event.

bool	m_first
	This variable is set to true if there are no waypoints in the std::deque.

bool	m_initialPositionIsWaypoint
	If true, calling SetPosition with no waypoints creates a waypoint.

bool	m_lazyNotify
	If true, course change updates are only notified when position is calculated.

Waypoint	m_next
	The next ns3::Waypoint in the deque.

Vector	m_velocity
	The current velocity vector.

std::deque< Waypoint >	m_waypoints
	The double ended queue containing the ns3::Waypoint objects.

Private Member Functions
void	DoDispose () override
	The dispose method.

Vector	DoGetPosition () const override
	Get current position.

Vector	DoGetVelocity () const override
	Returns the current velocity of a node.

void	DoSetPosition (const Vector &position) override
	Sets a new position for the node.

virtual void	Update () const
	Update the underlying state corresponding to the stored waypoints.

Friends
class	::WaypointMobilityModelNotifyTest

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	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

Waypoint-based mobility model.

Each object determines its velocity and position at a given time from a set of ns3::Waypoint objects. Past waypoints are discarded after the current simulation time greater than their time value.

By default, the initial position of each object corresponds to the position of the first waypoint, and the initial velocity of each object is zero. Upon reaching the last waypoint, object position becomes static and velocity is zero.

When a node is in between waypoint times, it moves with a constant velocity between the position at the previous waypoint and the position at the current waypoint. To make a node hold a certain position for a time interval, two waypoints with the same position (but different times) should be inserted sequentially.

Waypoints can be added at any time, and setting the current position of an object will set its velocity to zero until the next waypoint time (at which time the object jumps to the next waypoint), unless there are no more waypoints in which case it will not change without user intervention.

The model has two attributes with methods that allow clients to get the next waypoint value (NextWaypoint) and the number of waypoints left (WaypointsLeft) beyond (but not including) the next waypoint.

In addition, there are two attributes that govern model behavior. The first, LazyNotify, governs how the model calls the CourseChange trace. By default, LazyNotify is false, which means that each time that a waypoint time is hit, an Update() is forced and the CourseChange callback will be called. When LazyNotify is true, Update() is suppressed at waypoint times, and CourseChange callbacks will only occur when there later are actual calls to Update () (typically when calling GetPosition ()). This option may be enabled for execution run-time performance improvements, but when enabled, users should note that course change listeners will in general not be notified at waypoint times but instead at the next Update() following a waypoint time, and some waypoints may not be notified to course change listeners.

The second, InitialPositionIsWaypoint, is false by default. Recall that the first waypoint will set the initial position and set velocity equal to 0 until the first waypoint time. In such a case, the call to SetPosition(), such as from a PositionAllocator, will be ignored. However, if InitialPositionIsWaypoint is set to true and SetPosition() is called before any waypoints have been added, the SetPosition() call is treated as an initial waypoint at time zero. In such a case, when SetPosition() is treated as an initial waypoint, it should be noted that attempts to add a waypoint at the same time will cause the program to fail.

Definition at line 77 of file waypoint-mobility-model.h.

Constructor & Destructor Documentation

◆ WaypointMobilityModel()

ns3::WaypointMobilityModel::WaypointMobilityModel ( )

Create a path with no waypoints at location (0,0,0).

Definition at line 60 of file waypoint-mobility-model.cc.

◆ ~WaypointMobilityModel()

ns3::WaypointMobilityModel::~WaypointMobilityModel ( )

override

Definition at line 67 of file waypoint-mobility-model.cc.

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

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Member Function Documentation

◆ AddWaypoint()

void ns3::WaypointMobilityModel::AddWaypoint ( const Waypoint & waypoint )

Parameters

waypoint waypoint to append to the object path.

Add a waypoint to the path of the object. The time must be greater than the previous waypoint added, otherwise a fatal error occurs. The first waypoint is set as the current position with a velocity of zero.

Definition at line 79 of file waypoint-mobility-model.cc.

References m_current, m_event, m_first, m_lazyNotify, m_next, m_waypoints, ns3::Simulator::Now(), NS_ABORT_MSG_IF, ns3::Simulator::Schedule(), ns3::Waypoint::time, and Update().

Referenced by DoSetPosition().

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◆ DoDispose()

void ns3::WaypointMobilityModel::DoDispose ( )

overrideprivatevirtual

The dispose method.

Subclasses must override this method.

Reimplemented from ns3::Object.

Definition at line 73 of file waypoint-mobility-model.cc.

References ns3::Object::DoDispose().

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◆ DoGetPosition()

Vector ns3::WaypointMobilityModel::DoGetPosition ( ) const

overrideprivatevirtual

Get current position.

Returns: A vector with the current position of the node.

Implements ns3::MobilityModel.

Definition at line 179 of file waypoint-mobility-model.cc.

References m_current, ns3::Waypoint::position, and Update().

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◆ DoGetVelocity()

Vector ns3::WaypointMobilityModel::DoGetVelocity ( ) const

overrideprivatevirtual

Returns the current velocity of a node.

Returns: The velocity vector of a node.

Implements ns3::MobilityModel.

Definition at line 218 of file waypoint-mobility-model.cc.

References m_velocity.

◆ DoSetPosition()

void ns3::WaypointMobilityModel::DoSetPosition ( const Vector & position )

overrideprivatevirtual

Sets a new position for the node.

Parameters

position A vector to be added as the new position

Implements ns3::MobilityModel.

Definition at line 186 of file waypoint-mobility-model.cc.

References AddWaypoint(), m_current, m_first, m_initialPositionIsWaypoint, m_next, m_velocity, ns3::MobilityModel::NotifyCourseChange(), ns3::Simulator::Now(), ns3::Waypoint::position, ns3::Waypoint::time, and Update().

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◆ EndMobility()

void ns3::WaypointMobilityModel::EndMobility ( )

Clear any existing waypoints and set the current waypoint time to infinity.

Calling this is only an optimization and not required. After calling this function, adding waypoints behaves as it would for a new object.

Definition at line 209 of file waypoint-mobility-model.cc.

References m_current, m_first, m_next, m_waypoints, and ns3::Waypoint::time.

◆ GetNextWaypoint()

Waypoint ns3::WaypointMobilityModel::GetNextWaypoint ( ) const

Get the waypoint that this object is traveling towards.

Returns: The waypoint

Definition at line 102 of file waypoint-mobility-model.cc.

References m_next, and Update().

Referenced by GetTypeId().

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◆ GetTypeId()

TypeId ns3::WaypointMobilityModel::GetTypeId ( )

static

Register this type with the TypeId system.

Returns: the object TypeId

Definition at line 28 of file waypoint-mobility-model.cc.

References ns3::TypeId::ATTR_GET, GetNextWaypoint(), m_initialPositionIsWaypoint, m_lazyNotify, ns3::MakeBooleanAccessor(), ns3::MakeBooleanChecker(), ns3::MakeUintegerAccessor(), ns3::MakeUintegerChecker(), ns3::MakeWaypointAccessor(), ns3::MakeWaypointChecker(), ns3::TypeId::SetParent(), and WaypointsLeft().

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◆ Update()

void ns3::WaypointMobilityModel::Update ( ) const

privatevirtual

Update the underlying state corresponding to the stored waypoints.

Definition at line 116 of file waypoint-mobility-model.cc.

References m_current, m_next, m_velocity, m_waypoints, ns3::MobilityModel::NotifyCourseChange(), ns3::Simulator::Now(), NS_ASSERT, ns3::Waypoint::position, ns3::Seconds(), and ns3::Waypoint::time.

Referenced by AddWaypoint(), DoGetPosition(), DoSetPosition(), GetNextWaypoint(), and WaypointsLeft().

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◆ WaypointsLeft()

uint32_t ns3::WaypointMobilityModel::WaypointsLeft ( ) const

Get the number of waypoints left for this object, excluding the next one.

Returns: The number of waypoints left

Definition at line 109 of file waypoint-mobility-model.cc.

References m_waypoints, and Update().

Referenced by GetTypeId().

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Friends And Related Symbol Documentation

◆ ::WaypointMobilityModelNotifyTest

friend class ::WaypointMobilityModelNotifyTest

friend

Definition at line 125 of file waypoint-mobility-model.h.

Member Data Documentation

◆ m_current

Waypoint ns3::WaypointMobilityModel::m_current

mutableprotected

The ns3::Waypoint currently being used.

Definition at line 175 of file waypoint-mobility-model.h.

Referenced by AddWaypoint(), DoGetPosition(), DoSetPosition(), EndMobility(), and Update().

◆ m_event

EventId ns3::WaypointMobilityModel::m_event

protected

Update event.

Definition at line 187 of file waypoint-mobility-model.h.

Referenced by ~WaypointMobilityModel(), and AddWaypoint().

◆ m_first

bool ns3::WaypointMobilityModel::m_first

protected

This variable is set to true if there are no waypoints in the std::deque.

Definition at line 158 of file waypoint-mobility-model.h.

Referenced by AddWaypoint(), DoSetPosition(), and EndMobility().

◆ m_initialPositionIsWaypoint

bool ns3::WaypointMobilityModel::m_initialPositionIsWaypoint

protected

If true, calling SetPosition with no waypoints creates a waypoint.

Definition at line 167 of file waypoint-mobility-model.h.

Referenced by DoSetPosition(), and GetTypeId().

◆ m_lazyNotify

bool ns3::WaypointMobilityModel::m_lazyNotify

protected

If true, course change updates are only notified when position is calculated.

Definition at line 163 of file waypoint-mobility-model.h.

Referenced by AddWaypoint(), and GetTypeId().

◆ m_next

Waypoint ns3::WaypointMobilityModel::m_next

mutableprotected

The next ns3::Waypoint in the deque.

Definition at line 179 of file waypoint-mobility-model.h.

Referenced by AddWaypoint(), DoSetPosition(), EndMobility(), GetNextWaypoint(), and Update().

◆ m_velocity

Vector ns3::WaypointMobilityModel::m_velocity

mutableprotected

The current velocity vector.

Definition at line 183 of file waypoint-mobility-model.h.

Referenced by DoGetVelocity(), DoSetPosition(), and Update().

◆ m_waypoints

std::deque<Waypoint> ns3::WaypointMobilityModel::m_waypoints

mutableprotected

The double ended queue containing the ns3::Waypoint objects.

Definition at line 171 of file waypoint-mobility-model.h.

Referenced by AddWaypoint(), EndMobility(), Update(), and WaypointsLeft().

The documentation for this class was generated from the following files:

src/mobility/model/waypoint-mobility-model.h
src/mobility/model/waypoint-mobility-model.cc

Public Member Functions

Static Public Member Functions

Protected Attributes

Private Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ WaypointMobilityModel()

◆ ~WaypointMobilityModel()

Member Function Documentation

◆ AddWaypoint()

◆ DoDispose()

◆ DoGetPosition()

◆ DoGetVelocity()

◆ DoSetPosition()

◆ EndMobility()

◆ GetNextWaypoint()

◆ GetTypeId()

◆ Update()

◆ WaypointsLeft()

Friends And Related Symbol Documentation

◆ ::WaypointMobilityModelNotifyTest

Member Data Documentation

◆ m_current

◆ m_event

◆ m_first

◆ m_initialPositionIsWaypoint

◆ m_lazyNotify

◆ m_next

◆ m_velocity

◆ m_waypoints