ns3::RandomWalk2dMobilityModel Class Reference

a 2D random walk position model More...

#include <random-walk-2d-mobility-model.h>

Inheritance diagram for ns3::RandomWalk2dMobilityModel:
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List of all members.

Public Types

enum  Mode { MODE_DISTANCE, MODE_TIME }

Public Member Functions

 RandomWalk2dMobilityModel ()

Static Public Member Functions

static TypeId GetTypeId (void)
 This method returns the TypeId associated to ns3::RandomWalk2dMobilityModel.

Private Member Functions

void Start (void)
void Rebound (Time timeLeft)
void DoWalk (Time timeLeft)
virtual void DoDispose (void)
virtual Vector DoGetPosition (void) const
virtual void DoSetPosition (const Vector &position)
virtual Vector DoGetVelocity (void) const

Private Attributes

StaticSpeedHelper m_helper
EventId m_event
enum Mode m_mode
double m_modeDistance
Time m_modeTime
RandomVariable m_speed
RandomVariable m_direction
Rectangle m_bounds

Detailed Description

a 2D random walk position model

Each instance moves with a speed and direction choosen at random with the user-provided random variables until either a fixed distance has been walked or until a fixed amount of time. If we hit one of the boundaries (specified by a rectangle), of the model, we rebound on the boundary with a reflexive angle and speed. This model is often identified as a brownian motion model.

Definition at line 45 of file random-walk-2d-mobility-model.h.


Member Enumeration Documentation

Enumerator:
MODE_DISTANCE 
MODE_TIME 

Definition at line 50 of file random-walk-2d-mobility-model.h.


Constructor & Destructor Documentation

ns3::RandomWalk2dMobilityModel::RandomWalk2dMobilityModel (  ) 

Definition at line 75 of file random-walk-2d-mobility-model.cc.

References m_event, ns3::Simulator::ScheduleNow(), and Start().


Member Function Documentation

void ns3::RandomWalk2dMobilityModel::DoDispose ( void   )  [private, virtual]

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

Subclasses are expected to implement their real destruction code in an overriden 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.

Reimplemented from ns3::Object.

Definition at line 149 of file random-walk-2d-mobility-model.cc.

Vector ns3::RandomWalk2dMobilityModel::DoGetPosition ( void   )  const [private, virtual]
Returns:
the current position.

Concrete subclasses of this base class must implement this method.

Implements ns3::MobilityModel.

Definition at line 155 of file random-walk-2d-mobility-model.cc.

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

Vector ns3::RandomWalk2dMobilityModel::DoGetVelocity ( void   )  const [private, virtual]
Returns:
the current velocity.

Concrete subclasses of this base class must implement this method.

Implements ns3::MobilityModel.

Definition at line 169 of file random-walk-2d-mobility-model.cc.

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

void ns3::RandomWalk2dMobilityModel::DoSetPosition ( const Vector position  )  [private, virtual]
Parameters:
position the position to set.

Concrete subclasses of this base class must implement this method.

Implements ns3::MobilityModel.

Definition at line 161 of file random-walk-2d-mobility-model.cc.

References ns3::Rectangle::IsInside(), m_bounds, m_event, m_helper, NS_ASSERT, ns3::Simulator::Remove(), ns3::Simulator::ScheduleNow(), ns3::StaticSpeedHelper::SetPosition(), and Start().

void ns3::RandomWalk2dMobilityModel::DoWalk ( Time  timeLeft  )  [private]
TypeId ns3::RandomWalk2dMobilityModel::GetTypeId ( void   )  [static]

This method returns the TypeId associated to ns3::RandomWalk2dMobilityModel.

This object is accessible through the following paths with Config::Set and Config::Connect:

  • /NodeList/[i]/$ns3MobilityModel/$ns3RandomWalk2dMobilityModel

Attributes defined for this type:

  • Bounds: Bounds of the area to cruise.
  • Time: Change current direction and speed after moving for this delay.
    • Set with class: TimeValue
    • Underlying type: Time
    • Initial value: 1000000000ns
    • Flags: construct write read
  • Distance: Change current direction and speed after moving for this distance.
    • Set with class: ns3::DoubleValue
    • Underlying type: double -1.79769e+308:1.79769e+308
    • Initial value: 1
    • Flags: construct write read
  • Mode: The mode indicates the condition used to change the current speed and direction
    • Set with class: ns3::EnumValue
    • Underlying type: Distance|Time
    • Initial value: Distance
    • Flags: construct write read
  • Direction: A random variable used to pick the direction (gradients).
  • Speed: A random variable used to pick the speed (m/s).

Attributes defined in parent class ns3::MobilityModel:

  • Position: The current position of the mobility model.
  • Velocity: The current velocity of the mobility model.

No TraceSources defined for this type.
TraceSources defined in parent class ns3::MobilityModel:

  • CourseChange: The value of the position and/or velocity vector changed

Reimplemented from ns3::MobilityModel.

Definition at line 34 of file random-walk-2d-mobility-model.cc.

References ns3::TypeId::AddAttribute(), ns3::TypeId::AddConstructor(), m_bounds, m_direction, m_mode, m_modeDistance, m_modeTime, m_speed, ns3::MakeEnumAccessor(), ns3::MakeEnumChecker(), MODE_DISTANCE, MODE_TIME, ns3::Seconds(), and ns3::TypeId::SetParent().

void ns3::RandomWalk2dMobilityModel::Rebound ( Time  timeLeft  )  [private]
void ns3::RandomWalk2dMobilityModel::Start ( void   )  [private]

Member Data Documentation

Definition at line 72 of file random-walk-2d-mobility-model.h.

Referenced by GetTypeId(), and Start().

Definition at line 68 of file random-walk-2d-mobility-model.h.

Referenced by GetTypeId(), and Start().

Definition at line 69 of file random-walk-2d-mobility-model.h.

Referenced by GetTypeId(), and Start().

Definition at line 70 of file random-walk-2d-mobility-model.h.

Referenced by GetTypeId(), and Start().

Definition at line 71 of file random-walk-2d-mobility-model.h.

Referenced by GetTypeId(), and Start().


The documentation for this class was generated from the following files:
Generated on Thu Dec 3 14:11:57 2009 for NS-3 by  doxygen 1.6.3