jist.swans.field
Class Mobility.RandomWalk

java.lang.Object
  jist.swans.field.Mobility.RandomWalk

All Implemented Interfaces:

Mobility

Enclosing interface:

Mobility

public static class Mobility.RandomWalk
extends java.lang.Object
implements Mobility

Random Walk mobility model: pick a direction, walk a certain distance in that direction, with some fixed and random component, reflecting off walls as necessary, then pause for some time and repeat.

Since:

SWANS1.0

Author:

Rimon Barr <barr+jist@cs.cornell.edu>

Nested Class Summary

Nested classes/interfaces inherited from interface jist.swans.field.Mobility

Mobility.MobilityInfo, Mobility.RandomWalk, Mobility.RandomWaypoint, Mobility.RandomWaypointInfo, Mobility.Static, Mobility.Teleport

Field Summary

private Location.Location2D	bounds field boundaries.
private double	fixedRadius fixed component of step size.
private long	pauseTime time wait between steps.
private double	randomRadius random component of step size.

Constructor Summary

Mobility.RandomWalk(Location.Location2D bounds, double fixedRadius, double randomRadius, long pauseTime)
Create and initialize new random walk object.

Mobility.RandomWalk(Location.Location2D bounds, java.lang.String config)
Create an initialize a new random walk object.

Method Summary

Mobility.MobilityInfo	init(FieldInterface f, java.lang.Integer id, Location loc) Initiate mobility; initialize mobility data structures.
private void	init(Location.Location2D bounds, double fixedRadius, double randomRadius, long pauseTime) Initialize random walk object.
void	next(FieldInterface f, java.lang.Integer id, Location loc, Mobility.MobilityInfo info) Schedule next movement.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

fixedRadius

private double fixedRadius

fixed component of step size.

randomRadius

private double randomRadius

random component of step size.

pauseTime

private long pauseTime

time wait between steps.

bounds

private Location.Location2D bounds

field boundaries.

Constructor Detail

Mobility.RandomWalk

public Mobility.RandomWalk(Location.Location2D bounds,
                           double fixedRadius,
                           double randomRadius,
                           long pauseTime)

Create and initialize new random walk object.

Parameters:

bounds - field boundaries

fixedRadius - fixed component of step size

randomRadius - random component of step size

pauseTime - time wait between steps

Mobility.RandomWalk

public Mobility.RandomWalk(Location.Location2D bounds,
                           java.lang.String config)

Create an initialize a new random walk object.

Parameters:

bounds - field boundaries

config - configuration string: "fixed,random,time(in seconds)"

Method Detail

init

private void init(Location.Location2D bounds,
                  double fixedRadius,
                  double randomRadius,
                  long pauseTime)

Initialize random walk object.

Parameters:

bounds - field boundaries

fixedRadius - fixed component of step size

randomRadius - random component of step size

pauseTime - time wait between steps

init

public Mobility.MobilityInfo init(FieldInterface f,
                                  java.lang.Integer id,
                                  Location loc)

Initiate mobility; initialize mobility data structures.

Specified by:

init in interface Mobility

Parameters:

f - field entity

id - node identifier

loc - node location

Returns:

mobility information object

next

public void next(FieldInterface f,
                 java.lang.Integer id,
                 Location loc,
                 Mobility.MobilityInfo info)

Schedule next movement. This method will again be called after every movement on the field.

Specified by:

next in interface Mobility

Parameters:

f - field entity

id - radio identifier

loc - destination of move

info - mobility information object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object