routing

Class ProphetV2Router

java.lang.Object

routing.MessageRouter

routing.ActiveRouter

routing.ProphetV2Router

public class ProphetV2Router
extends ActiveRouter

Implementation of PRoPHETv2" router as described in http://tools.ietf.org/html/draft-irtf-dtnrg-prophet-09

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	BETA_S Transitivity scaling constant (beta) -setting id ("beta").
static double	DEFAULT_BETA delivery predictability transitivity scaling constant default value
static double	GAMMA delivery predictability aging constant
static double	I_TYP typical interconnection time in seconds
static double	PEncMax delivery predictability initialization constant
static java.lang.String	PROPHET_NS Prophet router's setting namespace ("ProphetV2Router")
static java.lang.String	SECONDS_IN_UNIT_S Number of seconds in time unit -setting id ("secondsInTimeUnit").

Fields inherited from class routing.ActiveRouter

DELETE_DELIVERED_S, deleteDelivered, RESPONSE_PREFIX, sendingConnections

Fields inherited from class routing.MessageRouter

B_SIZE_S, DENIED_LOW_RESOURCES, DENIED_NO_SPACE, DENIED_OLD, DENIED_POLICY, DENIED_TTL, DENIED_UNSPECIFIED, MSG_TTL_S, msgTtl, Q_MODE_FIFO, Q_MODE_RANDOM, RCV_OK, SEND_QUEUE_MODE_S, TRY_LATER_BUSY

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ProphetV2Router(ProphetV2Router r) Copyc onstructor.
	ProphetV2Router(Settings s) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	changedConnection(Connection con) Called when a connection's state changes.
double	getEncTimeFor(DTNHost host) Returns the timestamp of the last encouter of with the host or -1 if entry for the host doesn't exist.
double	getPredFor(DTNHost host) Returns the current prediction (P) value for a host or 0 if entry for the host doesn't exist.
RoutingInfo	getRoutingInfo() Returns routing information about this router.
MessageRouter	replicate() Creates a replicate of this router.
void	update() Checks out all sending connections to finalize the ready ones and abort those whose connection went down.

Methods inherited from class routing.ActiveRouter

addToSendingConnections, canStartTransfer, checkReceiving, createNewMessage, dropExpiredMessages, exchangeDeliverableMessages, getConnections, getMessagesForConnected, getNextMessageToRemove, hasEnergy, init, isSending, isTransferring, makeRoomForMessage, makeRoomForNewMessage, messageTransferred, receiveMessage, requestDeliverableMessages, shuffleMessages, startTransfer, transferAborted, transferDone, tryAllMessages, tryAllMessagesToAllConnections, tryMessagesForConnected, tryMessagesToConnections

Methods inherited from class routing.MessageRouter

addApplication, addToMessages, compareByQueueMode, deleteMessage, getApplications, getBufferSize, getFreeBufferSize, getHost, getMessage, getMessageCollection, getNrofMessages, hasMessage, isBlacklistedMessage, isDeliveredMessage, isIncomingMessage, messageAborted, putToIncomingBuffer, removeFromIncomingBuffer, removeFromMessages, sendMessage, sortByQueueMode, toString

Methods inherited from class java.lang.Object

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

Field Detail

PEncMax

public static final double PEncMax

delivery predictability initialization constant

See Also:

Constant Field Values

I_TYP

public static final double I_TYP

typical interconnection time in seconds

See Also:

Constant Field Values

DEFAULT_BETA

public static final double DEFAULT_BETA

delivery predictability transitivity scaling constant default value

See Also:

Constant Field Values

GAMMA

public static final double GAMMA

delivery predictability aging constant

See Also:

Constant Field Values

PROPHET_NS

public static final java.lang.String PROPHET_NS

Prophet router's setting namespace ("ProphetV2Router")

See Also:

Constant Field Values

SECONDS_IN_UNIT_S

public static final java.lang.String SECONDS_IN_UNIT_S

Number of seconds in time unit -setting id ("secondsInTimeUnit"). How many seconds one time unit is when calculating aging of delivery predictions. Should be tweaked for the scenario.

See Also:

Constant Field Values

BETA_S

public static final java.lang.String BETA_S

Transitivity scaling constant (beta) -setting id ("beta"). Default value for setting is DEFAULT_BETA.

See Also:

Constant Field Values

Constructor Detail

ProphetV2Router

public ProphetV2Router(Settings s)

Constructor. Creates a new message router based on the settings in the given Settings object.

Parameters:

s - The settings object

ProphetV2Router

protected ProphetV2Router(ProphetV2Router r)

Copyc onstructor.

Parameters:

The - router prototype where setting values are copied from

Method Detail

changedConnection

public void changedConnection(Connection con)

Description copied from class: ActiveRouter

Called when a connection's state changes. If energy modeling is enabled, and a new connection is created to this node, reduces the energy for the device discovery (scan response) amount

Overrides:

changedConnection in class ActiveRouter

Parameters:

con - The connection that changed

getEncTimeFor

public double getEncTimeFor(DTNHost host)

Returns the timestamp of the last encouter of with the host or -1 if entry for the host doesn't exist.

Parameters:

host - The host to look the timestamp for

Returns:

the last timestamp of encouter with the host

getPredFor

public double getPredFor(DTNHost host)

Returns the current prediction (P) value for a host or 0 if entry for the host doesn't exist.

Parameters:

host - The host to look the P for

Returns:

the current P value

update

public void update()

Description copied from class: ActiveRouter

Checks out all sending connections to finalize the ready ones and abort those whose connection went down. Also drops messages whose TTL <= 0 (checking every one simulated minute).

Overrides:

update in class ActiveRouter

See Also:

ActiveRouter.addToSendingConnections(Connection)

getRoutingInfo

public RoutingInfo getRoutingInfo()

Description copied from class: MessageRouter

Returns routing information about this router.

Overrides:

getRoutingInfo in class ActiveRouter

Returns:

The routing information.

replicate

public MessageRouter replicate()

Description copied from class: MessageRouter

Creates a replicate of this router. The replicate has the same settings as this router but empty buffers and routing tables.

Specified by:

replicate in class MessageRouter

Returns:

The replicate