ns3::DelayJitterEstimation Class Reference

quick and dirty delay and jitter estimation More...

#include "delay-jitter-estimation.h"

Public Member Functions
	DelayJitterEstimation ()
Time	GetLastDelay (void) const
uint64_t	GetLastJitter (void) const
	The jitter is calculated using the RFC 1889 (RTP) jitter definition. More...
void	RecordRx (Ptr< const Packet > packet)

Static Public Member Functions
static void	PrepareTx (Ptr< const Packet > packet)

Private Attributes
Time	m_delay
	Delay estimation. More...
int64x64_t	m_jitter
	Jitter estimation. More...
Time	m_previousRx
	Previous Rx time. More...
Time	m_previousRxTx
	Previous Rx or Tx time. More...

Detailed Description

quick and dirty delay and jitter estimation

Definition at line 34 of file delay-jitter-estimation.h.

Constructor & Destructor Documentation

DelayJitterEstimation()

ns3::DelayJitterEstimation::DelayJitterEstimation

(

)

Definition at line 111 of file delay-jitter-estimation.cc.

Member Function Documentation

GetLastDelay()

Time ns3::DelayJitterEstimation::GetLastDelay

(

void

)

const

Returns

the updated delay.

Definition at line 144 of file delay-jitter-estimation.cc.

References m_delay.

GetLastJitter()

uint64_t ns3::DelayJitterEstimation::GetLastJitter

(

void

)

const

The jitter is calculated using the RFC 1889 (RTP) jitter definition.

Returns

the updated jitter.

Definition at line 149 of file delay-jitter-estimation.cc.

References ns3::int64x64_t::GetHigh(), and m_jitter.

PrepareTx()

void ns3::DelayJitterEstimation::PrepareTx ( Ptr< const Packet >  packet )

static

Parameters

packet

the packet to send over a wire

This method should be invoked once on each packet to record within the packet the tx time which is used upon packet reception to calculate the delay and jitter. The tx time is stored in the packet as an ns3::Tag which means that it does not use any network resources and is not taken into account in transmission delay calculations.

Definition at line 119 of file delay-jitter-estimation.cc.

References ns3::Packet::AddByteTag().

RecordRx()

void ns3::DelayJitterEstimation::RecordRx

(

Ptr< const Packet >

packet

)

Parameters

packet

the packet received

Invoke this method to update the delay and jitter calculations After a call to this method, GetLastDelay and GetLastJitter will return an updated delay and jitter.

Definition at line 125 of file delay-jitter-estimation.cc.

References ns3::Abs(), ns3::Packet::FindFirstMatchingByteTag(), ns3::DelayJitterEstimationTimestampTag::GetTxTime(), m_delay, m_jitter, m_previousRx, m_previousRxTx, and ns3::Simulator::Now().

Member Data Documentation

m_delay

Time ns3::DelayJitterEstimation::m_delay

private

Delay estimation.

Definition at line 75 of file delay-jitter-estimation.h.

Referenced by GetLastDelay(), and RecordRx().

m_jitter

int64x64_t ns3::DelayJitterEstimation::m_jitter

private

Jitter estimation.

Definition at line 74 of file delay-jitter-estimation.h.

Referenced by GetLastJitter(), and RecordRx().

m_previousRx

Time ns3::DelayJitterEstimation::m_previousRx

private

Previous Rx time.

Definition at line 72 of file delay-jitter-estimation.h.

Referenced by RecordRx().

m_previousRxTx

Time ns3::DelayJitterEstimation::m_previousRxTx

private

Previous Rx or Tx time.

Definition at line 73 of file delay-jitter-estimation.h.

Referenced by RecordRx().

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

• src/network/helper/delay-jitter-estimation.h
• src/network/helper/delay-jitter-estimation.cc