shawn::AlohaTransmissionModel Class Reference

Aloha transmission model where each message is delivered without delay but there is packet loss. More...

#include <aloha_transmission_model.h>

Inheritance diagram for shawn::AlohaTransmissionModel:

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Collaboration diagram for shawn::AlohaTransmissionModel:

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List of all members.

Public Member Functions
Construction, destruction and lifecycle support
	AlohaTransmissionModel ()
virtual	~AlohaTransmissionModel ()
virtual void	init (void) throw ()
virtual void	reset (void) throw ()
Transmission model implementation
virtual bool	supports_mobility (void) const throw (std::logic_error)
	Mobility is depending on mobility support from the edge model.
virtual void	send_message (TransmissionModel::MessageInfo &mi) throw ()
	Stores each message in a vector for delivery at the next simulation round start.
virtual void	deliver_messages () throw ()
	Delivers all messages which are in the vector.
Protected Member Functions
virtual void	deliver_one_message (msg_delivery *msg) throw ()
	Delivers one message.
virtual void	drop_collided_frames (TransmissionModel::MessageInfo &mi) throw ()
	Drop frames that collide.
void	find_destinations (msg_delivery *pmsg)
	Find the neighbors of the node who send a message.
virtual bool	remove_collided_destinations (msg_delivery *msg1, msg_delivery *msg2)
	Set the valid_ tag of destinations where messages collide to be false.
Protected Attributes
int	received_
	Number of received messages.
int	dropped_
	Number of dropped messages.
int	packet_failure_
	Number of packets failed to reach the destination.
std::vector< msg_delivery * >	aired_messages_
	The messages that have been sent by the nodes and are waiting for delivery.
Classes
struct	msg_delivery
	Message structure used in Aloha transmission model. More...
struct	same_round
	Unary function to determine if two messages are of the same simulation round. More...

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Detailed Description

Aloha transmission model where each message is delivered without delay but there is packet loss.

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Constructor & Destructor Documentation

shawn::AlohaTransmissionModel::AlohaTransmissionModel

(

)

virtual shawn::AlohaTransmissionModel::~AlohaTransmissionModel

(

)

[virtual]

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Member Function Documentation

virtual void shawn::AlohaTransmissionModel::init

(

void

)

throw () [virtual]

Reimplemented from shawn::TransmissionModel.

Reimplemented in shawn::SlottedAlohaTransmissionModel.

virtual void shawn::AlohaTransmissionModel::reset

(

void

)

throw () [virtual]

Reimplemented from shawn::TransmissionModel.

Reimplemented in shawn::SlottedAlohaTransmissionModel.

virtual bool shawn::AlohaTransmissionModel::supports_mobility

(

void

)

const throw (std::logic_error) [virtual]

Mobility is depending on mobility support from the edge model.

The edge model is used to determine the 1-hop neighbours which will receive the message

Implements shawn::TransmissionModel.

virtual void shawn::AlohaTransmissionModel::send_message

(

TransmissionModel::MessageInfo &

mi

)

throw () [virtual]

Stores each message in a vector for delivery at the next simulation round start.

A new structure of msg_delivery will be build and inserted into aired_messages_

See also:

aired_messages_

Implements shawn::TransmissionModel.

virtual void shawn::AlohaTransmissionModel::deliver_messages

(

)

throw () [virtual]

Delivers all messages which are in the vector.

Call deliver_one_message( msg_delivery* msg ) for each element in aired_messages_

See also:

aired_messages_

Implements shawn::TransmissionModel.

virtual void shawn::AlohaTransmissionModel::deliver_one_message

(

msg_delivery *

msg

)

throw () [protected, virtual]

Delivers one message.

Deliver one message to the destinations of the msg with tag valid_ having a true value

Parameters:

msg

message to be delivered

virtual void shawn::AlohaTransmissionModel::drop_collided_frames

(

TransmissionModel::MessageInfo &

mi

)

throw () [protected, virtual]

Drop frames that collide.

Set the valid_ tag of the destinations of both mi and other messages in the aired_messages_ to be false if collision occurs

Parameters:

mi

the new-coming message

Reimplemented in shawn::SlottedAlohaTransmissionModel.

void shawn::AlohaTransmissionModel::find_destinations

(

msg_delivery *

pmsg

)

[protected]

Find the neighbors of the node who send a message.

Find all the destinations of a new-coming messages that are the neighbours of its source node

Parameters:

pmsg

the message whose source node's neighbours to be determined

virtual bool shawn::AlohaTransmissionModel::remove_collided_destinations	(	msg_delivery *	msg1,
		msg_delivery *	msg2
	)			[protected, virtual]

Set the valid_ tag of destinations where messages collide to be false.

Returns:

true if any valid_ tag is set false

Reimplemented in shawn::SlottedAlohaTransmissionModel.

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Member Data Documentation

int shawn::AlohaTransmissionModel::received_ [protected]

Number of received messages.

int shawn::AlohaTransmissionModel::dropped_ [protected]

Number of dropped messages.

int shawn::AlohaTransmissionModel::packet_failure_ [protected]

Number of packets failed to reach the destination.

std::vector<msg_delivery*> shawn::AlohaTransmissionModel::aired_messages_ [protected]

The messages that have been sent by the nodes and are waiting for delivery.

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

• src/sys/transm_models/aloha_transmission_model.h