Implements the DCF (Distributed Coordination Function) for IEEE 802.11.

Usage diagram

The following diagram shows usage relationships between types. Unresolved types are missing from the diagram.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Parameters

Name	Type	Default value	Description
rxModule	string
txModule	string

Properties

Name	Value	Description
class	Dcf
display	i=block/layer

Signals

Name	Type	Unit
frameSequenceStarted
packetDropped	inet::Packet
datarateSelected	double
packetReceivedFromPeer	inet::Packet
packetSentToPeer	inet::Packet
linkBroken	inet::Packet
frameSequenceFinished

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode
packetReceivedFromPeerMulticast	packets received: multicast	ieee80211Multicast(packetReceivedFromPeer)	count, sum(packetBytes), vector(packetBytes)		none
packetDropNotAddressedToUs	packet drops: not addressed to us	packetDropReasonIsNotAddressedToUs(packetDropped)	count, sum(packetBytes), vector(packetBytes)		none
packetDropQueueOverflow	packet drops: queue overflow	packetDropReasonIsQueueOverflow(packetDropped)	count, sum(packetBytes), vector(packetBytes)		none
packetDropRetryLimitReached	packet drops: retry limit reached	packetDropReasonIsRetryLimitReached(packetDropped)	count, sum(packetBytes), vector(packetBytes)		none
datarateSelected	datarates selected		vector		none
packetSentToPeerWithoutRetry	packets sent: without retry	ieee80211NotRetry(packetSentToPeer)	count, sum(packetBytes), vector(packetBytes)		none
packetSentToPeer	packets sent		count, sum(packetBytes), vector(packetBytes)		none
linkBroken	link breaks		count, vector?		none
packetDrop	packet drops	packetDropped	count, sum(packetBytes), vector(packetBytes)		none
frameSequenceFinished	finished frame sequences		count
packetSentToPeerUnicast	packets sent: unicast	ieee80211Unicast(packetSentToPeer)	count, sum(packetBytes), vector(packetBytes)		none
packetReceivedFromPeerUnicast	packets received: unicast	ieee80211Unicast(packetReceivedFromPeer)	count, sum(packetBytes), vector(packetBytes)		none
packetSentToPeerWithRetry	packets sent: with retry	ieee80211Retry(packetSentToPeer)	count, sum(packetBytes), vector(packetBytes)		none
frameSequenceNumPackets	frame sequences: number of packets	frameSequenceNumPackets(frameSequenceFinished)	histogram, vector?
packetSentToPeerBroadcast	packets sent: broadcast	ieee80211Broadcast(packetSentToPeer)	count, sum(packetBytes), vector(packetBytes)		none
packetReceivedFromPeerWithRetry	packets received: with retry	ieee80211Retry(packetReceivedFromPeer)	count, sum(packetBytes), vector(packetBytes)		none
frameSequenceActive	frame sequence active	warmup(count(frameSequenceStarted)-count(frameSequenceFinished))	vector		sample-hold
packetReceivedFromPeer	packets received		count, sum(packetBytes), vector(packetBytes)		none
frameSequenceDuration	frame sequence durations	frameSequenceDuration(frameSequenceFinished)	histogram, vector?
packetReceivedFromPeerWithoutRetry	packets received: without retry	ieee80211NotRetry(packetReceivedFromPeer)	count, sum(packetBytes), vector(packetBytes)		none
packetSentToPeerMulticast	packets sent: multicast	ieee80211Multicast(packetSentToPeer)	count, sum(packetBytes), vector(packetBytes)		none
packetReceivedFromPeerBroadcast	packets received: broadcast	ieee80211Broadcast(packetReceivedFromPeer)	count, sum(packetBytes), vector(packetBytes)		none

Scheduled messages (observed)

msg	kind	ctrl	tags	msgname	context
omnetpp::cMessage	0			startRxTimeout

Direct method calls (observed)

call to	function	info
Ieee80211Interface	inet::NetworkInterface::receiveSignal	POST_MODEL_CHANGE
Ieee80211Mac	inet::ieee80211::Ieee80211Mac::sendUpFrame	sendUpFrame("%s")
Tx	inet::ieee80211::Tx::transmitFrame	transmitFrame("%s")
Dcaf	inet::ieee80211::Dcaf::incrementCw	incrementCw
Dcaf	inet::ieee80211::Dcaf::releaseChannel	releaseChannel
Dcaf	inet::ieee80211::Dcaf::requestChannel	requestChannel
Dcaf	inet::ieee80211::Dcaf::resetCw	resetCw
Dcf	inet::ieee80211::Dcf::frameSequenceFinished	frameSequenceFinished
Dcf	inet::ieee80211::Dcf::originatorProcessFailedFrame	originatorProcessFailedFrame
Dcf	inet::ieee80211::Dcf::originatorProcessReceivedFrame	originatorProcessReceivedFrame
Dcf	inet::ieee80211::Dcf::originatorProcessRtsProtectionFailed	originatorProcessRtsProtectionFailed
Dcf	inet::ieee80211::Dcf::originatorProcessTransmittedFrame	originatorProcessTransmittedFrame
Dcf	inet::ieee80211::Dcf::scheduleStartRxTimer	scheduleStartRxTimer
Dcf	inet::ieee80211::Dcf::transmitControlResponseFrame	transmitControlResponseFrame
Dcf	inet::ieee80211::Dcf::transmitFrame	transmitFrame
OriginatorMacDataService	inet::ieee80211::OriginatorMacDataService::extractFramesToTransmit	extractFramesToTransmit
InProgressFrames	inet::ieee80211::InProgressFrames::clearDroppedFrames	clearDroppedFrames
PendingQueue	inet::queueing::PacketQueue::pushPacket	pushPacket
AarfRateControl	inet::ieee80211::AarfRateControl::getRate	getRate
RecipientMacDataService	inet::ieee80211::RecipientMacDataService::controlFrameReceived	controlFrameReceived
RecipientMacDataService	inet::ieee80211::RecipientMacDataService::dataFrameReceived	dataFrameReceived
RecipientMacDataService	inet::ieee80211::RecipientMacDataService::managementFrameReceived	managementFrameReceived
Aodv	inet::aodv::Aodv::receiveSignal	linkBroken
Dymo	inet::dymo::Dymo::receiveSignal	linkBroken
Gpsr	inet::Gpsr::receiveSignal	linkBroken

Called methods (observed)

function	info	call from
inet::ieee80211::Dcf::channelGranted	channelGranted	Dcaf
inet::ieee80211::Dcf::corruptedFrameReceived	corruptedFrameReceived	Ieee80211Mac
inet::ieee80211::Dcf::frameSequenceFinished	frameSequenceFinished	Dcf
inet::ieee80211::Dcf::originatorProcessFailedFrame	originatorProcessFailedFrame	Dcf
inet::ieee80211::Dcf::originatorProcessReceivedFrame	originatorProcessReceivedFrame	Dcf
inet::ieee80211::Dcf::originatorProcessRtsProtectionFailed	originatorProcessRtsProtectionFailed	Dcf
inet::ieee80211::Dcf::originatorProcessTransmittedFrame	originatorProcessTransmittedFrame	Dcf
inet::ieee80211::Dcf::processLowerFrame	processLowerFrame(%s)	Ieee80211Mac
inet::ieee80211::Dcf::processUpperFrame	processUpperFrame(%s)	Ieee80211Mac
inet::ieee80211::Dcf::receiveSignal	modesetChanged	Ieee80211Mac
inet::ieee80211::Dcf::scheduleStartRxTimer	scheduleStartRxTimer	Dcf
inet::ieee80211::Dcf::transmissionComplete	transmissionComplete	Tx
inet::ieee80211::Dcf::transmitControlResponseFrame	transmitControlResponseFrame	Dcf
inet::ieee80211::Dcf::transmitFrame	transmitFrame	Dcf

Packet operations (observed)

chunkType	packetAction
Ieee80211AckFrame	Packet
Ieee80211CtsFrame	Packet
Ieee80211DataHeader	insertAtFront
Ieee80211DataOrMgmtHeader	peekAtFront, removeAtFront
Ieee80211MacHeader	peekAtFront, removeAtFront
Ieee80211MacTrailer	insertAtBack
Ieee80211MgmtHeader	insertAtFront
Ieee80211RtsFrame	insertAtBack, insertAtFront, peekAtFront

Shared Tagging operations (observed)

tagType	tagAction
Ieee80211ModeInd	findTag
Ieee80211ModeReq	addTagIfAbsent, findTag

Unassigned submodule parameters

Name	Type	Default value	Description
channelAccess.inProgressFrames.pendingQueueModule	string	"^.pendingQueue"
channelAccess.inProgressFrames.originatorMacDataServiceModule	string	"^.^.originatorMacDataService"
channelAccess.inProgressFrames.ackHandlerModule	string	"^.^.ackHandler"
rateSelection.multicastFrameBitrate	double	-1bps
rateSelection.responseAckFrameBitrate	double	-1bps
rateSelection.responseCtsFrameBitrate	double	-1bps
rateSelection.dataFrameBitrate	double	-1bps	fastest
rateSelection.dataFrameBandwidth	double	nan Hz	unspecified by default
rateSelection.dataFrameNumSpatialStreams	int	-1	unspecified by default
rateSelection.mgmtFrameBitrate	double	-1bps	fastest
rateSelection.controlFrameBitrate	double	-1bps
recoveryProcedure.shortRetryLimit	int	7
recoveryProcedure.longRetryLimit	int	4
originatorProtectionMechanism.rateSelectionModule	string
originatorAckPolicy.rateSelectionModule	string
recipientAckPolicy.rateSelectionModule	string
rtsPolicy.rateSelectionModule	string
ctsPolicy.rxModule	string
ctsPolicy.rateSelectionModule	string

Source code

//
// Implements the DCF (Distributed Coordination Function) for IEEE 802.11.
//
module Dcf like IDcf
{
    parameters:
        string rxModule;
        string txModule;

        *.rateSelectionModule = "^.rateSelection";
        *.rxModule = "^." + this.rxModule;

        @class(Dcf);
        @display("i=block/layer");
        @signal[packetSentToPeer](type=inet::Packet);
        @signal[packetReceivedFromPeer](type=inet::Packet);
        @signal[linkBroken](type=inet::Packet);
        @signal[packetDropped](type=inet::Packet);
        @signal[frameSequenceStarted];
        @signal[frameSequenceFinished];
        @signal[datarateSelected](type=double);
        @statistic[packetSentToPeer](title="packets sent"; record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetSentToPeerUnicast](title="packets sent: unicast"; source=ieee80211Unicast(packetSentToPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetSentToPeerMulticast](title="packets sent: multicast"; source=ieee80211Multicast(packetSentToPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetSentToPeerBroadcast](title="packets sent: broadcast "; source=ieee80211Broadcast(packetSentToPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetSentToPeerWithRetry](title="packets sent: with retry"; source=ieee80211Retry(packetSentToPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetSentToPeerWithoutRetry](title="packets sent: without retry"; source=ieee80211NotRetry(packetSentToPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetReceivedFromPeer](title="packets received"; record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetReceivedFromPeerUnicast](title="packets received: unicast"; source=ieee80211Unicast(packetReceivedFromPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetReceivedFromPeerMulticast](title="packets received: multicast"; source=ieee80211Multicast(packetReceivedFromPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetReceivedFromPeerBroadcast](title="packets received: broadcast"; source=ieee80211Broadcast(packetReceivedFromPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetReceivedFromPeerWithRetry](title="packets received: with retry"; source=ieee80211Retry(packetReceivedFromPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetReceivedFromPeerWithoutRetry](title="packets received: without retry"; source=ieee80211NotRetry(packetReceivedFromPeer); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[linkBroken](title="link breaks"; record=count,vector?; interpolationmode=none);
        @statistic[packetDrop](title="packet drops"; source=packetDropped; record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetDropNotAddressedToUs](title="packet drops: not addressed to us"; source=packetDropReasonIsNotAddressedToUs(packetDropped); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetDropQueueOverflow](title="packet drops: queue overflow"; source=packetDropReasonIsQueueOverflow(packetDropped); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetDropRetryLimitReached](title="packet drops: retry limit reached"; source=packetDropReasonIsRetryLimitReached(packetDropped); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[frameSequenceFinished](title="finished frame sequences"; record=count);
        @statistic[frameSequenceDuration](title="frame sequence durations"; source=frameSequenceDuration(frameSequenceFinished); record=histogram,vector?);
        @statistic[frameSequenceNumPackets](title="frame sequences: number of packets"; source=frameSequenceNumPackets(frameSequenceFinished); record=histogram,vector?);
        @statistic[frameSequenceActive](title="frame sequence active"; source=warmup(count(frameSequenceStarted)-count(frameSequenceFinished)); record=vector; interpolationmode=sample-hold; autoWarmupFilter=false);
        @statistic[datarateSelected](title="datarates selected"; record=vector; interpolationmode=none);

    submodules:
        // TODO consider merging Dcaf into Dcf, because its not like the relationship between Hcf and Edcaf or
        // TODO maybe move PendingQueue and InProgressFrames in Edcaf?
        channelAccess: Dcaf {
            parameters:
                @display("p=150,100");
        }
        originatorMacDataService: OriginatorMacDataService {
            parameters:
                @display("p=150,200");
        }
        recipientMacDataService: RecipientMacDataService {
            parameters:
                @display("p=150,300");
        }
        rateSelection: RateSelection {
            parameters:
                rateControlModule = "^.rateControl";
                @display("p=350,100");
        }
        rateControl: <default("")> like IRateControl if typename != "" {
            parameters:
                @display("p=350,200");
        }
        recoveryProcedure: NonQosRecoveryProcedure {
            parameters:
                cwCalculatorModule = "^.channelAccess";
                rtsPolicyModule = "^.rtsPolicy";
                @display("p=350,300");
        }
        originatorProtectionMechanism: OriginatorProtectionMechanism {
            parameters:
                @display("p=150,400");
        }
        ackHandler: AckHandler {
            parameters:
                @display("p=350,400");
        }
        originatorAckPolicy: <default("OriginatorAckPolicy")> like IOriginatorAckPolicy {
            parameters:
                @display("p=550,100");
        }
        recipientAckPolicy: <default("RecipientAckPolicy")> like IRecipientAckPolicy {
            parameters:
                @display("p=550,200");
        }
        rtsPolicy: <default("RtsPolicy")> like IRtsPolicy {
            parameters:
                @display("p=550,300");
        }
        ctsPolicy: <default("CtsPolicy")> like ICtsPolicy {
            parameters:
                @display("p=550,400");
        }
}

File: src/inet/linklayer/ieee80211/mac/coordinationfunction/Dcf.ned

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