jist.swans.field
Class Field

java.lang.Object
  jist.swans.field.Field

All Implemented Interfaces:

JistAPI.Proxiable, JistAPI.Timeless, FieldInterface

public class Field
extends java.lang.Object
implements FieldInterface

An abstract parent of Field implementations, which contains the common code.

Since:

SWANS1.0

Version:

$Id: Field.java,v 1.57 2004/04/06 16:07:47 barr Exp $

Author:

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

Nested Class Summary

static interface	Field.ConnectivityVisitor Connectivity visitor interface.
static class	Field.RadioData Radio information stored by the Field entity.

Field Summary

protected Fading	fading Fading model.
protected double	limit Propagation limit (in dBm).
static org.apache.log4j.Logger	logField logger for field events.
protected Mobility	mobility Mobility model.
protected PathLoss	pathloss Pathloss model.
protected Field.RadioData[]	radios Array of radios on this field.
protected FieldInterface	self Self-referencing field entity.
protected Spatial	spatial Spatial data structure.
private Spatial.SpatialTransmitVisitor	transmitVisitor Transmission visitor object.

Constructor Summary

Field(Location bounds)
Initialize new, empty field with default fading (FadingNone) and pathloss (PathLossFreeSpace) models, and default propagation limits.

Field(Location bounds, boolean wrap)
Initialize new, empty field with default fading (FadingNone) and pathloss (PathLossFreeSpace) models, and default propagation limits, possibly with wrapped edges.

Field(Spatial spatial, Fading fading, PathLoss pathloss, Mobility mobility, double propagationLimit)
Initialize new, empty field with given fading and pathloss models, using default propagation limits.

Method Summary

void	addRadio(RadioInfo info, RadioInterface entity, Location loc) Add a radio onto the field.
double	computeAvgConnectivity(boolean sense) Compute field connectivity.
double	computeDensity() Compute field density.
void	delRadio(java.lang.Integer id) Remove a radio from the field.
FieldInterface	getProxy() Return the proxy entity of this field.
Field.RadioData	getRadioData(java.lang.Integer id) Return radio properties.
void	moveRadio(java.lang.Integer id, Location loc) Move radio to different location on field.
void	moveRadioOff(java.lang.Integer id, Location delta) Move radio to different relative location on field.
void	setFading(Fading fading) Set field fading model.
void	setMobility(Mobility mobility) Set mobility model.
void	setPathLoss(PathLoss pathloss) Set field pathloss model.
void	setPropagationLimit(double limit) Set signal propagation threshold.
void	startMobility(java.lang.Integer id) Start mobility; schedule first mobility event.
void	transmit(RadioInfo srcInfo, Message msg, long duration) Transmit physical-layer message.

Methods inherited from class java.lang.Object

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

Field Detail

logField

public static final org.apache.log4j.Logger logField

logger for field events.

limit

protected double limit

Propagation limit (in dBm). This is the signal strength threshold.

pathloss

protected PathLoss pathloss

Pathloss model.

fading

protected Fading fading

Fading model.

mobility

protected Mobility mobility

Mobility model.

spatial

protected Spatial spatial

Spatial data structure.

self

protected FieldInterface self

Self-referencing field entity.

radios

protected Field.RadioData[] radios

Array of radios on this field.

transmitVisitor

private Spatial.SpatialTransmitVisitor transmitVisitor

Transmission visitor object.

Constructor Detail

Field

public Field(Location bounds)

Initialize new, empty field with default fading (FadingNone) and pathloss (PathLossFreeSpace) models, and default propagation limits.

Parameters:

bounds - spatial limits of field

Field

public Field(Location bounds,
             boolean wrap)

Initialize new, empty field with default fading (FadingNone) and pathloss (PathLossFreeSpace) models, and default propagation limits, possibly with wrapped edges.

Parameters:

bounds - spatial limits of field

wrap - whether to wrap field edges

Field

public Field(Spatial spatial,
             Fading fading,
             PathLoss pathloss,
             Mobility mobility,
             double propagationLimit)

Initialize new, empty field with given fading and pathloss models, using default propagation limits.

Parameters:

spatial - binning model

fading - fading model

pathloss - pathloss model

mobility - mobility model

propagationLimit - minimum signal threshold (in dBm)

Method Detail

setFading

public void setFading(Fading fading)

Set field fading model.

Parameters:

fading - fading model

setPathLoss

public void setPathLoss(PathLoss pathloss)

Set field pathloss model.

Parameters:

pathloss - pathloss model

setMobility

public void setMobility(Mobility mobility)

Set mobility model.

Parameters:

mobility - mobility model

setPropagationLimit

public void setPropagationLimit(double limit)

Set signal propagation threshold.

Parameters:

limit - minimum signal threshold (in dBm)

getProxy

public FieldInterface getProxy()

Return the proxy entity of this field.

Returns:

proxy entity of this field

addRadio

public void addRadio(RadioInfo info,
                     RadioInterface entity,
                     Location loc)

Add a radio onto the field.

Parameters:

info - radio properties (includes radio identifier)

entity - radio upcall entity reference

loc - radio location

delRadio

public void delRadio(java.lang.Integer id)

Remove a radio from the field.

Parameters:

id - radio identifier

getRadioData

public Field.RadioData getRadioData(java.lang.Integer id)

Return radio properties.

Parameters:

id - radio identifier

Returns:

radio properties

moveRadio

public void moveRadio(java.lang.Integer id,
                      Location loc)

Move radio to different location on field.

Specified by:

moveRadio in interface FieldInterface

Parameters:

id - unique radio identifier

loc - new radio coordinates

moveRadioOff

public void moveRadioOff(java.lang.Integer id,
                         Location delta)

Move radio to different relative location on field.

Specified by:

moveRadioOff in interface FieldInterface

Parameters:

id - unique radio identifier

delta - radio offset coordinates

startMobility

public void startMobility(java.lang.Integer id)

Start mobility; schedule first mobility event.

Parameters:

id - radio identifier

transmit

public void transmit(RadioInfo srcInfo,
                     Message msg,
                     long duration)

Transmit physical-layer message. Called from radio entity.

Specified by:

transmit in interface FieldInterface

Parameters:

srcInfo - source radio information

msg - physical layer packet

duration - transmission duration

computeDensity

public double computeDensity()

Compute field density.

Returns:

field node density

computeAvgConnectivity

public double computeAvgConnectivity(boolean sense)

Compute field connectivity.

Parameters:

sense - whether to use radio sensing or reception signal strength

Returns:

field connectivity