inet::ieee80211::IContention Class Reference

Abstract interface for processes that implement contention-based channel access. More...

#include <IContention.h>

Inheritance diagram for inet::ieee80211::IContention:

Classes
class	ICallback

Public Member Functions
virtual	~IContention ()
virtual void	startContention (int cw, simtime_t ifs, simtime_t eifs, simtime_t slotTime, ICallback *callback)=0
virtual bool	isContentionInProgress ()=0
virtual void	mediumStateChanged (bool mediumFree)=0
virtual void	corruptedFrameReceived ()=0

Static Public Attributes
static simsignal_t	backoffPeriodGeneratedSignal = cComponent::registerSignal("backoffPeriodGenerated")
static simsignal_t	backoffStartedSignal = cComponent::registerSignal("backoffStarted")
static simsignal_t	backoffStoppedSignal = cComponent::registerSignal("backoffStopped")
static simsignal_t	channelAccessGrantedSignal = cComponent::registerSignal("channelAccessGranted")

Detailed Description

Abstract interface for processes that implement contention-based channel access.

For each frame, Contention listens on the channel for a DIFS (AIFS) period then for a random backoff period before transmitting the frame, and defers when busy channel is sensed. After receiving a corrupted frame, EIFS is used instead of the original DIFS (AIFS).

Note that waiting for an ACK (or CTS) and initiating the retransmission if it does not arrive is not handled by this process. Instead, that is typically performed by a frame exchange class INET_API inside UpperMac (see IFrameExchange, IUpperMac).

Constructor & Destructor Documentation

~IContention()

virtual inet::ieee80211::IContention::~IContention ( )

inlinevirtual

{}

Member Function Documentation

corruptedFrameReceived()

virtual void inet::ieee80211::IContention::corruptedFrameReceived ( )

pure virtual

Implemented in inet::ieee80211::Contention.

isContentionInProgress()

virtual bool inet::ieee80211::IContention::isContentionInProgress ( )

pure virtual

Implemented in inet::ieee80211::Contention.

mediumStateChanged()

virtual void inet::ieee80211::IContention::mediumStateChanged ( bool  mediumFree )

pure virtual

Implemented in inet::ieee80211::Contention.

Referenced by inet::ieee80211::Rx::registerContention().

startContention()

virtual void inet::ieee80211::IContention::startContention ( int  cw, simtime_t  ifs, simtime_t  eifs, simtime_t  slotTime, ICallback *  callback  )

pure virtual

Implemented in inet::ieee80211::Contention.

Member Data Documentation

backoffPeriodGeneratedSignal

simsignal_t inet::ieee80211::IContention::backoffPeriodGeneratedSignal = cComponent::registerSignal("backoffPeriodGenerated")

static

Referenced by inet::ieee80211::Contention::startContention().

backoffStartedSignal

simsignal_t inet::ieee80211::IContention::backoffStartedSignal = cComponent::registerSignal("backoffStarted")

static

Referenced by inet::ieee80211::Contention::scheduleTransmissionRequestFor().

backoffStoppedSignal

simsignal_t inet::ieee80211::IContention::backoffStoppedSignal = cComponent::registerSignal("backoffStopped")

static

Referenced by inet::ieee80211::Contention::cancelTransmissionRequest(), and inet::ieee80211::Contention::handleMessage().

channelAccessGrantedSignal

simsignal_t inet::ieee80211::IContention::channelAccessGrantedSignal = cComponent::registerSignal("channelAccessGranted")

static

Referenced by inet::ieee80211::Contention::handleMessage().

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

• IContention.h
• IContention.cc