Package: inet.queueing.queue

RedDropperQueue

compound module

Combines a packet queue with random early detection (RED) dropper.

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.

Extends

Name	Type	Description
CompoundPacketQueueBase	compound module	This compound module serves as a base module for complex packet queues formed by combining several queueing components.

Parameters

Name	Type	Default value	Description
displayStringTextFormat	string	"contains %p pk (%l) pushed %u created %c\n pulled %o removed %r dropped %d"	determines the text that is written on top of the submodule
packetCapacity	int	-1	maximum number of packets in the queue, no limit by default
dataCapacity	int	-1b	maximum total length of packets in the queue, no limit by default
dropperClass	string	""	determines which packets are dropped when the queue is overloaded, packets are not dropped by default; the parameter must be the name of a C++ class which implements the IPacketDropperFunction C++ interface and is registered via Register_Class

Properties

Name	Value	Description
display	i=block/queue
class	CompoundPacketQueueBase
defaultStatistic	queueLength:vector

Gates

Name	Direction	Size	Description
in	input
out	output

Signals

Name	Type	Unit
packetRemoved	inet::Packet
packetPushStarted	inet::Packet
packetDropped	inet::Packet
packetPushEnded	inet::Packet?
packetPulled	inet::Packet

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode
queueBitLength	queue bit length	warmup(atomic(constant0(localSignal(packetPushEnded)) + sum(packetLength(localSignal(packetPushStarted))) - sum(packetLength(localSignal(packetPulled))) - sum(packetLength(localSignal(packetRemoved))) - sum(packetLength(localSignal(packetDropped)))))	last, max, timeavg, vector	b	sample-hold
queueLength	queue length	warmup(atomic(constant0(localSignal(packetPushEnded)) + count(localSignal(packetPushStarted)) - count(localSignal(packetPulled)) - count(localSignal(packetRemoved)) - count(localSignal(packetDropped))))	last, max, timeavg, vector	pk	sample-hold
droppedPacketsQueueOverflow	dropped packets: queue overflow	packetDropReasonIsQueueOverflow(localSignal(packetDropped))	count	pk	none
queueingTime	queueing times	queueingTime(localSignal(packetPulled))	histogram, vector	s	none
incomingDataRate	incoming datarate	throughput(localSignal(packetPushStarted))	vector	bps	linear
flowQueueingTime	flow queueing times	queueingTime(demuxFlow(localSignal(packetPulled)))	histogram, vector	s	none
incomingPacketLengths	incoming packet lengths	packetLength(localSignal(packetPushStarted))	sum, histogram, vector	b	none
flowIncomingDataRate	flow specific incoming data rate	throughput(flowPacketLength(demuxFlow(localSignal(packetPushStarted))))	vector	bps	linear
outgoingDataRate	outgoing datarate	throughput(localSignal(packetPulled))	vector	bps	linear
outgoingPacketLengths	outgoing packet lengths	packetLength(localSignal(packetPulled))	sum, histogram, vector	b	none
droppedPacketLengthsQueueOverflow	dropped packet lengths: queue overflow	packetLength(packetDropReasonIsQueueOverflow(localSignal(packetDropped)))	sum, vector	b	none
flowOutgoingDataRate	flow specific outgoing data rate	throughput(flowPacketLength(demuxFlow(localSignal(packetPulled))))	vector	bps	linear
incomingPackets	incoming packets	localSignal(packetPushStarted)	count	pk
outgoingPackets	outgoing packets	localSignal(packetPulled)	count	pk

Direct method calls (observed)

call to	function	info
PacketQueue	inet::queueing::PacketQueue::pullPacket	pullPacket

Called methods (observed)

function	info	call from
inet::queueing::CompoundPacketQueueBase::pullPacket	pullPacket	EthernetMac
inet::queueing::CompoundPacketQueueBase::receiveSignal	packetDropped	RedDropper

Region Tagging operations (observed)

tagType	tagAction
FlowTag	mapAllTags

Unassigned submodule parameters

Name	Type	Default value	Description
red.displayStringTextFormat	string	"dropped %d/%p pk (%k/%l)"	determines the text that is written on top of the submodule
red.backpressure	bool	false
red.collectionModule	string	""
red.wq	double	0.002	weight of the current queue length in the averaged queue length, in range [0.0, 1.0]
red.minth	double	5	minimum threshold for avg queue length
red.maxth	double	50	maximum threshold for avg queue length (=buffer capacity), in range (minth,packetCapacity]
red.maxp	double	0.02	maximum value for pbs, in range [0.0, 1.0]
red.pkrate	double	150	average packet rate for calculations when queue is empty
red.useEcn	bool	false	if enabled, packets are marked with ECN if applicable
red.packetCapacity	int	int(maxth)	packets are dropped if queue length is greater

Source code

//
// Combines a packet queue with random early detection (RED) dropper.
//
module RedDropperQueue extends CompoundPacketQueueBase
{
    submodules:
        red: RedDropper {
            @display("p=100,100");
        }
        fifo: <default("PacketQueue")> like IPacketQueue {
            @display("p=100,200");
        }
    connections:
        in --> { @display("m=n"); } --> red.in;
        red.out --> fifo.in;
        fifo.out --> { @display("m=s"); } --> out;
}

File: src/inet/queueing/queue/RedMarkerQueue.ned