28 #ifndef PIE_QUEUE_DISC_H
29 #define PIE_QUEUE_DISC_H
31 #include "ns3/queue-disc.h"
32 #include "ns3/nstime.h"
33 #include "ns3/boolean.h"
34 #include "ns3/data-rate.h"
35 #include "ns3/timer.h"
36 #include "ns3/event-id.h"
37 #include "ns3/random-variable-stream.h"
39 #define BURST_RESET_TIMEOUT 1.5
44 class UniformRandomVariable;
QueueDiscMode GetMode(void)
Get the operating mode of this queue disc.
uint32_t m_dqCount
Number of bytes departed since current measurement cycle starts.
Simulation virtual time values and global simulation resolution.
Time m_tUpdate
Time period after which CalculateP () is called.
Smart pointer class similar to boost::intrusive_ptr.
void SetMode(QueueDiscMode mode)
Set the operating mode of this queue disc.
QueueDiscMode m_mode
Mode (bytes or packets)
double m_avgDqRate
Time averaged dequeue rate.
Time m_maxBurst
Maximum burst allowed before random early dropping kicks in.
virtual Ptr< const QueueDiscItem > DoPeek(void) const
This function returns a copy of the next packet the queue disc will extract.
double m_a
Parameter to pie controller.
static constexpr const char * FORCED_DROP
Drops due to queue limit: reactive.
virtual void InitializeParams(void)
Initialize the queue parameters.
Use number of packets for maximum queue disc size.
uint32_t m_burstReset
Used to reset value of burst allowance.
static constexpr const char * UNFORCED_DROP
Early probability drops: proactive.
QueueDisc is an abstract base class providing the interface and implementing the operations common to...
Implements PIE Active Queue Management discipline.
Time m_qDelayRef
Desired queue delay.
double m_dropProb
Variable used in calculation of drop probability.
uint32_t m_meanPktSize
Average packet size in bytes.
void SetQueueLimit(uint32_t lim)
Set the limit of the queue in bytes or packets.
Time GetQueueDelay(void)
Get queue delay.
virtual bool CheckConfig(void)
Check whether the current configuration is correct.
Time m_sUpdate
Start time of the update timer.
uint32_t m_dqThreshold
Minimum queue size in bytes before dequeue rate is measured.
Time m_qDelayOld
Old value of queue delay.
double m_dqStart
Start timestamp of current measurement cycle.
bool DropEarly(Ptr< QueueDiscItem > item, uint32_t qSize)
Check if a packet needs to be dropped due to probability drop.
virtual void DoDispose(void)
Dispose of the object.
QueueDiscMode
Enumeration of the modes supported in the class.
void CalculateP()
Periodically update the drop probability based on the delay samples: not only the current delay sampl...
Every class exported by the ns3 library is enclosed in the ns3 namespace.
uint32_t GetQueueSize(void)
Get the current value of the queue in bytes or packets.
EventId m_rtrsEvent
Event used to decide the decision of interval of drop probability calculation.
Ptr< UniformRandomVariable > m_uv
Rng stream.
PieQueueDisc()
PieQueueDisc Constructor.
virtual Ptr< QueueDiscItem > DoDequeue(void)
This function actually extracts a packet from the queue disc.
int64_t AssignStreams(int64_t stream)
Assign a fixed random variable stream number to the random variables used by this model...
Time m_qDelay
Current value of queue delay.
An identifier for simulation events.
static TypeId GetTypeId(void)
Get the type ID.
BurstStateT m_burstState
Used to determine the current state of burst.
Time m_burstAllowance
Current max burst value in seconds that is allowed before random drops kick in.
virtual ~PieQueueDisc()
PieQueueDisc Destructor.
virtual bool DoEnqueue(Ptr< QueueDiscItem > item)
This function actually enqueues a packet into the queue disc.
uint32_t m_queueLimit
Queue limit in bytes / packets.
Use number of bytes for maximum queue disc size.
double m_b
Parameter to pie controller.
a unique identifier for an interface.
bool m_inMeasurement
Indicates whether we are in a measurement cycle.