wimemac::lowerMAC::timing::Backoff Class Reference

IEEE 802.11 DCF style backoff, including post-backoff after transmissions. More...

#include <lowerMAC/timing/Backoff.hpp>

Inheritance diagram for wimemac::lowerMAC::timing::Backoff:

[legend]

Collaboration diagram for wimemac::lowerMAC::timing::Backoff:

[legend]

List of all members.

Public Member Functions
	Backoff (BackoffObserver *backoffObserver, const wns::pyconfig::View &config)
wns::simulator::Time	finishedAt () const
int	getCurrentCW () const
void	onChannelBusy ()
	Indicates a channel state transition idle->busy.
void	onChannelIdle ()
	Indicates a channel state transition busy->idle.
void	OnDRPreservationChange (bool isDRPreservationOn_)
void	onRxEnd ()
void	onRxError ()
void	onRxStart (wns::simulator::Time expRxTime)
void	registerEOBObserver (BackoffObserver *observer)
	notifying observers every time the backoff has finished, wether or not a transmission is waiting
bool	transmissionRequest (int transmissionCounter)
	Transmission request by the scheduler.
	~Backoff ()
Protected Attributes
int	counter
Private Member Functions
void	channelBusyDelay ()
void	onTimeout ()
	implementation of CanTimeout interface
void	startNewBackoffCountdown (wns::simulator::Time ifsDuration)
void	waitForTimer (const wns::simulator::Time &waitDuration)
Private Attributes
const wns::simulator::Time	aifsDuration
wns::simulator::Time	aifsStart
bool	backoffFinished
BackoffObserver *	backoffObserver
bool	channelIsBusy
int	cw
const int	cwMax
const int	cwMin
bool	duringAIFS
const wns::simulator::Time	eifsDuration
std::vector< BackoffObserver * >	eobObserver
bool	isDRPreservationOn
wns::logger::Logger	logger
bool	rxError
const wns::simulator::Time	slotDuration
bool	transmissionWaiting
wns::distribution::Uniform	uniform
bool	wasChannelLastSensedBusyDuringDRP

---

Detailed Description

Essentially, the backoff in IEEE is very simple: Assure that between every channel busy->idle transition and the node's transmission a backoff is counted to zero.

Definition at line 61 of file Backoff.hpp.

---

Constructor & Destructor Documentation

wimemac::lowerMAC::timing::Backoff::Backoff	(	BackoffObserver *	backoffObserver,
		const wns::pyconfig::View &	config
	)

wimemac::lowerMAC::timing::Backoff::~Backoff

(

)

---

Member Function Documentation

void wimemac::lowerMAC::timing::Backoff::channelBusyDelay

(

)

[private]

wns::simulator::Time wimemac::lowerMAC::timing::Backoff::finishedAt

(

)

const

time the backoff will be finished at (when called during AIFS the maximum waiting time will be used) wns::simulator::Time() if backoff hasn't started, current time when finished and idle

int wimemac::lowerMAC::timing::Backoff::getCurrentCW

(

)

const [inline]

Definition at line 93 of file Backoff.hpp.

void wimemac::lowerMAC::timing::Backoff::onChannelBusy

(

)

[virtual]

Implements wimemac::convergence::IChannelState.

void wimemac::lowerMAC::timing::Backoff::onChannelIdle

(

)

[virtual]

Implements wimemac::convergence::IChannelState.

void wimemac::lowerMAC::timing::Backoff::OnDRPreservationChange

(

bool

isDRPreservationOn_

)

void wimemac::lowerMAC::timing::Backoff::onRxEnd

(

)

[virtual]

Implements wimemac::convergence::IRxStartEnd.

void wimemac::lowerMAC::timing::Backoff::onRxError

(

)

[virtual]

Implements wimemac::convergence::IRxStartEnd.

void wimemac::lowerMAC::timing::Backoff::onRxStart

(

wns::simulator::Time

expRxTime

)

[virtual]

Implements wimemac::convergence::IRxStartEnd.

void wimemac::lowerMAC::timing::Backoff::onTimeout

(

)

[private, virtual]

Implements wns::events::CanTimeout.

void wimemac::lowerMAC::timing::Backoff::registerEOBObserver

(

BackoffObserver *

observer

)

void wimemac::lowerMAC::timing::Backoff::startNewBackoffCountdown

(

wns::simulator::Time

ifsDuration

)

[private]

bool wimemac::lowerMAC::timing::Backoff::transmissionRequest

(

int

transmissionCounter

)

void wimemac::lowerMAC::timing::Backoff::waitForTimer

(

const wns::simulator::Time &

waitDuration

)

[private]

---

Member Data Documentation

const wns::simulator::Time wimemac::lowerMAC::timing::Backoff::aifsDuration [private]

Definition at line 124 of file Backoff.hpp.

wns::simulator::Time wimemac::lowerMAC::timing::Backoff::aifsStart [private]

Definition at line 140 of file Backoff.hpp.

bool wimemac::lowerMAC::timing::Backoff::backoffFinished [private]

Definition at line 127 of file Backoff.hpp.

BackoffObserver* wimemac::lowerMAC::timing::Backoff::backoffObserver [private]

Definition at line 120 of file Backoff.hpp.

bool wimemac::lowerMAC::timing::Backoff::channelIsBusy [private]

Definition at line 141 of file Backoff.hpp.

int wimemac::lowerMAC::timing::Backoff::counter [protected]

Definition at line 146 of file Backoff.hpp.

int wimemac::lowerMAC::timing::Backoff::cw [private]

Definition at line 137 of file Backoff.hpp.

const int wimemac::lowerMAC::timing::Backoff::cwMax [private]

Definition at line 136 of file Backoff.hpp.

const int wimemac::lowerMAC::timing::Backoff::cwMin [private]

Definition at line 135 of file Backoff.hpp.

bool wimemac::lowerMAC::timing::Backoff::duringAIFS [private]

Definition at line 129 of file Backoff.hpp.

const wns::simulator::Time wimemac::lowerMAC::timing::Backoff::eifsDuration [private]

Definition at line 125 of file Backoff.hpp.

std::vector<BackoffObserver*> wimemac::lowerMAC::timing::Backoff::eobObserver [private]

Definition at line 121 of file Backoff.hpp.

bool wimemac::lowerMAC::timing::Backoff::isDRPreservationOn [private]

Definition at line 132 of file Backoff.hpp.

wns::logger::Logger wimemac::lowerMAC::timing::Backoff::logger [private]

Definition at line 139 of file Backoff.hpp.

bool wimemac::lowerMAC::timing::Backoff::rxError [private]

Definition at line 130 of file Backoff.hpp.

const wns::simulator::Time wimemac::lowerMAC::timing::Backoff::slotDuration [private]

Definition at line 123 of file Backoff.hpp.

bool wimemac::lowerMAC::timing::Backoff::transmissionWaiting [private]

Definition at line 128 of file Backoff.hpp.

wns::distribution::Uniform wimemac::lowerMAC::timing::Backoff::uniform [private]

Definition at line 138 of file Backoff.hpp.

bool wimemac::lowerMAC::timing::Backoff::wasChannelLastSensedBusyDuringDRP [private]

Definition at line 133 of file Backoff.hpp.

---

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

• modules/dll/wimemac/src/lowerMAC/timing/Backoff.hpp