16#ifndef PIE_QUEUE_DISC_H
17#define PIE_QUEUE_DISC_H
21#include "ns3/boolean.h"
22#include "ns3/data-rate.h"
23#include "ns3/event-id.h"
24#include "ns3/nstime.h"
25#include "ns3/random-variable-stream.h"
28#define BURST_RESET_TIMEOUT 1.5
36class UniformRandomVariable;
96 "CE threshold exceeded mark";
105 friend class ::PieQueueDiscTestCase;
131 std::numeric_limits<uint64_t>::max();
Pie Queue Disc Test Case.
An identifier for simulation events.
Implements PIE Active Queue Management discipline.
uint32_t m_dqThreshold
Minimum queue size in bytes before dequeue rate is measured.
uint32_t m_meanPktSize
Average packet size in bytes.
double m_markEcnTh
ECN marking threshold (default 10% as suggested in RFC 8033)
bool m_useDqRateEstimator
Enable/Disable usage of dequeue rate estimator for queue delay calculation.
bool DoEnqueue(Ptr< QueueDiscItem > item) override
This function actually enqueues a packet into the queue disc.
void DoDispose() override
Dispose of the object.
bool m_useL4s
True if L4S is used (ECT1 packets are marked at CE threshold)
Time m_sUpdate
Start time of the update timer.
Time m_dqStart
Start timestamp of current measurement cycle.
bool m_useDerandomization
Enable Derandomization feature mentioned in RFC 8033.
static constexpr const char * UNFORCED_DROP
Early probability drops: proactive.
Time m_maxBurst
Maximum burst allowed before random early dropping kicks in.
EventId m_rtrsEvent
Event used to decide the decision of interval of drop probability calculation.
void CalculateP()
Periodically update the drop probability based on the delay samples: not only the current delay sampl...
Time m_ceThreshold
Threshold above which to CE mark.
Time m_qDelayOld
Old value of queue delay.
double m_dropProb
Variable used in calculation of drop probability.
Time m_burstAllowance
Current max burst value in seconds that is allowed before random drops kick in.
BurstStateT m_burstState
Used to determine the current state of burst.
Time GetQueueDelay()
Get queue delay.
Ptr< QueueDiscItem > DoDequeue() override
This function actually extracts a packet from the queue disc.
bool DropEarly(Ptr< QueueDiscItem > item, uint32_t qSize)
Check if a packet needs to be dropped due to probability drop.
bool m_active
Indicates whether PIE is in active state or not.
double m_avgDqRate
Time averaged dequeue rate.
static const uint64_t DQCOUNT_INVALID
Invalid dqCount value.
uint32_t m_burstReset
Used to reset value of burst allowance.
void InitializeParams() override
Initialize the queue parameters.
bool m_inMeasurement
Indicates whether we are in a measurement cycle.
static constexpr const char * FORCED_DROP
Drops due to queue limit: reactive.
Time m_qDelayRef
Desired queue delay.
~PieQueueDisc() override
PieQueueDisc Destructor.
double m_a
Parameter to pie controller.
static constexpr const char * CE_THRESHOLD_EXCEEDED_MARK
Early probability marks: proactive.
Time m_activeThreshold
Threshold for activating PIE (disabled by default)
bool m_isCapDropAdjustment
Enable/Disable Cap Drop Adjustment feature mentioned in RFC 8033.
int64_t AssignStreams(int64_t stream)
Assign a fixed random variable stream number to the random variables used by this model.
double m_accuProb
Accumulated drop probability.
Ptr< UniformRandomVariable > m_uv
Rng stream.
bool m_useEcn
Enable ECN Marking functionality.
Time m_tUpdate
Time period after which CalculateP () is called.
PieQueueDisc()
PieQueueDisc Constructor.
bool CheckConfig() override
Check whether the current configuration is correct.
Time m_qDelay
Current value of queue delay.
uint64_t m_dqCount
Number of bytes departed since current measurement cycle starts.
static TypeId GetTypeId()
Get the type ID.
double m_b
Parameter to pie controller.
static constexpr const char * UNFORCED_MARK
Early probability marks: proactive.
Smart pointer class similar to boost::intrusive_ptr.
QueueDisc is an abstract base class providing the interface and implementing the operations common to...
Simulation virtual time values and global simulation resolution.
a unique identifier for an interface.
Every class exported by the ns3 library is enclosed in the ns3 namespace.