Implementation of Minstrel Rate Control AlgorithmPorting Minstrel from Madwifi and Linux Kernel http://linuxwireless.org/en/developers/Documentation/mac80211/RateControl/minstrel. More...

#include <minstrel-wifi-manager.h>

Inheritance diagram for ns3::MinstrelWifiManager:

Collaboration diagram for ns3::MinstrelWifiManager:

Public Member Functions
	MinstrelWifiManager ()
virtual	~MinstrelWifiManager ()
int64_t	AssignStreams (int64_t stream)
virtual void	SetupPhy (Ptr< WifiPhy > phy)
Public Member Functions inherited from ns3::WifiRemoteStationManager
	WifiRemoteStationManager ()
virtual	~WifiRemoteStationManager ()
void	AddBasicMode (WifiMode mode)
void	AddSupportedMode (Mac48Address address, WifiMode mode)
WifiMode	GetAckMode (Mac48Address address, WifiMode dataMode)
WifiMode	GetBasicMode (uint32_t i) const
WifiMode	GetCtsMode (Mac48Address address, WifiMode rtsMode)
WifiMode	GetDataMode (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fullPacketSize)
WifiMode	GetDefaultMode (void) const
uint32_t	GetFragmentationThreshold (void) const
uint32_t	GetFragmentOffset (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fragmentNumber)
uint32_t	GetFragmentSize (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fragmentNumber)
WifiRemoteStationInfo	GetInfo (Mac48Address address)
uint32_t	GetMaxSlrc (void) const
uint32_t	GetMaxSsrc (void) const
uint32_t	GetNBasicModes (void) const
WifiMode	GetNonUnicastMode (void) const
uint32_t	GetRtsCtsThreshold (void) const
WifiMode	GetRtsMode (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
bool	IsAssociated (Mac48Address address) const
bool	IsBrandNew (Mac48Address address) const
bool	IsLastFragment (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fragmentNumber)
bool	IsWaitAssocTxOk (Mac48Address address) const
bool	NeedDataRetransmission (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
bool	NeedFragmentation (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
bool	NeedRts (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
bool	NeedRtsRetransmission (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
void	PrepareForQueue (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fullPacketSize)
void	RecordDisassociated (Mac48Address address)
void	RecordGotAssocTxFailed (Mac48Address address)
void	RecordGotAssocTxOk (Mac48Address address)
void	RecordWaitAssocTxOk (Mac48Address address)
void	ReportDataFailed (Mac48Address address, const WifiMacHeader *header)
void	ReportDataOk (Mac48Address address, const WifiMacHeader *header, double ackSnr, WifiMode ackMode, double dataSnr)
void	ReportFinalDataFailed (Mac48Address address, const WifiMacHeader *header)
void	ReportFinalRtsFailed (Mac48Address address, const WifiMacHeader *header)
void	ReportRtsFailed (Mac48Address address, const WifiMacHeader *header)
void	ReportRtsOk (Mac48Address address, const WifiMacHeader *header, double ctsSnr, WifiMode ctsMode, double rtsSnr)
void	ReportRxOk (Mac48Address address, const WifiMacHeader *header, double rxSnr, WifiMode txMode)
void	Reset (void)
void	Reset (Mac48Address address)
void	SetFragmentationThreshold (uint32_t threshold)
void	SetMaxSlrc (uint32_t maxSlrc)
void	SetMaxSsrc (uint32_t maxSsrc)
void	SetRtsCtsThreshold (uint32_t threshold)
Public Member Functions inherited from ns3::Object
	Object ()
virtual	~Object ()
void	AggregateObject (Ptr< Object > other)
void	Dispose (void)
AggregateIterator	GetAggregateIterator (void) const
virtual TypeId	GetInstanceTypeId (void) const
template<typename T >
Ptr< T >	GetObject (void) const
template<typename T >
Ptr< T >	GetObject (TypeId tid) const
void	Start (void)
Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	SimpleRefCount (const SimpleRefCount &o)
uint32_t	GetReferenceCount (void) const
SimpleRefCount &	operator= (const SimpleRefCount &o)
void	Ref (void) const
void	Unref (void) const
Public Member Functions inherited from ns3::ObjectBase
virtual	~ObjectBase ()
void	GetAttribute (std::string name, AttributeValue &value) const
bool	GetAttributeFailSafe (std::string name, AttributeValue &attribute) const
void	SetAttribute (std::string name, const AttributeValue &value)
bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)
bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)
bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)

Static Public Member Functions
static TypeId	GetTypeId (void)
	This method returns the TypeId associated to ns3::MinstrelWifiManager.

Private Types
typedef std::vector< std::pair < Time, WifiMode > >	TxTime

Private Member Functions
void	AddCalcTxTime (WifiMode mode, Time t)
void	CheckInit (MinstrelWifiRemoteStation *station)
	check for initializations
virtual WifiRemoteStation *	DoCreateStation (void) const
virtual WifiMode	DoGetDataMode (WifiRemoteStation *station, uint32_t size)
virtual WifiMode	DoGetRtsMode (WifiRemoteStation *station)
virtual void	DoReportDataFailed (WifiRemoteStation *station)
virtual void	DoReportDataOk (WifiRemoteStation *station, double ackSnr, WifiMode ackMode, double dataSnr)
virtual void	DoReportFinalDataFailed (WifiRemoteStation *station)
virtual void	DoReportFinalRtsFailed (WifiRemoteStation *station)
virtual void	DoReportRtsFailed (WifiRemoteStation *station)
virtual void	DoReportRtsOk (WifiRemoteStation *station, double ctsSnr, WifiMode ctsMode, double rtsSnr)
virtual void	DoReportRxOk (WifiRemoteStation *station, double rxSnr, WifiMode txMode)
uint32_t	FindRate (MinstrelWifiRemoteStation *station)
	find a rate to use from Minstrel Table
Time	GetCalcTxTime (WifiMode mode) const
	for estimating the TxTime of a packet with a given mode
uint32_t	GetNextSample (MinstrelWifiRemoteStation *station)
	getting the next sample from Sample Table
void	InitSampleTable (MinstrelWifiRemoteStation *station)
	initialize Sample Table
virtual bool	IsLowLatency (void) const
void	PrintSampleTable (MinstrelWifiRemoteStation *station)
	printing Sample Table
void	PrintTable (MinstrelWifiRemoteStation *station)
	printing Minstrel Table
void	RateInit (MinstrelWifiRemoteStation *station)
	initialize Minstrel Table
void	UpdateRetry (MinstrelWifiRemoteStation *station)
	update the number of retries and reset accordingly
void	UpdateStats (MinstrelWifiRemoteStation *station)
	updating the Minstrel Table every 1/10 seconds

Private Attributes
TxTime	m_calcTxTime
	to hold all the calculated TxTime for all modes
double	m_ewmaLevel
	exponential weighted moving average
double	m_lookAroundRate
	the % to try other rates than our current rate
MinstrelRate	m_minstrelTable
	minstrel table
uint32_t	m_nsupported
	modes supported
uint32_t	m_pktLen
	packet length used for calculate mode TxTime
uint32_t	m_sampleCol
	number of sample columns
SampleRate	m_sampleTable
	sample table
uint32_t	m_segmentSize
	largest allowable segment size
Ptr< UniformRandomVariable >	m_uniformRandomVariable
	Provides uniform random variables.
Time	m_updateStats
	how frequent do we calculate the stats(1/10 seconds)

Additional Inherited Members
Protected Member Functions inherited from ns3::WifiRemoteStationManager
virtual void	DoDispose (void)
uint32_t	GetNSupported (const WifiRemoteStation *station) const
WifiMode	GetSupported (const WifiRemoteStation *station, uint32_t i) const

Detailed Description

Implementation of Minstrel Rate Control Algorithm

Porting Minstrel from Madwifi and Linux Kernel http://linuxwireless.org/en/developers/Documentation/mac80211/RateControl/minstrel.

Author: Duy Nguyen

Definition at line 87 of file minstrel-wifi-manager.h.

Member Typedef Documentation

typedef std::vector<std::pair<Time,WifiMode> > ns3::MinstrelWifiManager::TxTime

private

Definition at line 155 of file minstrel-wifi-manager.h.

Constructor & Destructor Documentation

ns3::MinstrelWifiManager::MinstrelWifiManager ( )

Definition at line 121 of file minstrel-wifi-manager.cc.

References m_nsupported, and m_uniformRandomVariable.

ns3::MinstrelWifiManager::~MinstrelWifiManager ( )

virtual

Definition at line 128 of file minstrel-wifi-manager.cc.

Member Function Documentation

void ns3::MinstrelWifiManager::AddCalcTxTime	(	WifiMode	mode,
		Time	t
	)

private

Definition at line 168 of file minstrel-wifi-manager.cc.

References m_calcTxTime.

Referenced by SetupPhy().

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int64_t ns3::MinstrelWifiManager::AssignStreams ( int64_t stream )

Assign a fixed random variable stream number to the random variables used by this model. Return the number of streams (possibly zero) that have been assigned.

Parameters

stream first stream index to use

Returns: the number of stream indices assigned by this model

Definition at line 145 of file minstrel-wifi-manager.cc.

References m_uniformRandomVariable, NS_LOG_FUNCTION, and ns3::RandomVariableStream::SetStream().

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void ns3::MinstrelWifiManager::CheckInit ( MinstrelWifiRemoteStation * station )

private

check for initializations

Definition at line 201 of file minstrel-wifi-manager.cc.

References ns3::WifiRemoteStationManager::GetNSupported(), InitSampleTable(), ns3::MinstrelWifiRemoteStation::m_initialized, m_minstrelTable, m_nsupported, m_sampleCol, m_sampleTable, and RateInit().

Referenced by DoGetDataMode(), DoReportDataFailed(), and DoReportDataOk().

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WifiRemoteStation * ns3::MinstrelWifiManager::DoCreateStation ( void ) const

privatevirtual

Definition at line 174 of file minstrel-wifi-manager.cc.

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WifiMode ns3::MinstrelWifiManager::DoGetDataMode	(	WifiRemoteStation *	station,
		uint32_t	size
	)

privatevirtual

start the rate at half way

Definition at line 439 of file minstrel-wifi-manager.cc.

References CheckInit(), ns3::WifiRemoteStationManager::GetSupported(), ns3::MinstrelWifiRemoteStation::m_initialized, m_nsupported, ns3::MinstrelWifiRemoteStation::m_txrate, and UpdateStats().

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WifiMode ns3::MinstrelWifiManager::DoGetRtsMode ( WifiRemoteStation * station )

privatevirtual

Definition at line 455 of file minstrel-wifi-manager.cc.

References ns3::WifiRemoteStationManager::GetSupported(), ns3::MinstrelWifiRemoteStation::m_txrate, and NS_LOG_DEBUG.

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void ns3::MinstrelWifiManager::DoReportDataFailed ( WifiRemoteStation * station )

privatevirtual

Retry Chain table is implemented here

Try | LOOKAROUND RATE | NORMAL RATE

| random < best | random > best |

Note: For clarity, multiple blocks of if's and else's are used After a failing 7 times, DoReportFinalDataFailed will be called

for normal rate, we're not currently sampling random rates

use best throughput rate

< there's still a few retries left

use second best throughput rate

use best probability rate

use lowest base rate

for look-around rate, we're currently sampling random rates

current sampling rate is slower than the current best rate

use best throughput rate

< there are a few retries left

use random rate

use max probability rate

use lowest base rate

current sampling rate is better than current best rate

use random rate

< keep using it

use the best rate

use the best probability rate

use the lowest base rate

Definition at line 248 of file minstrel-wifi-manager.cc.

References CheckInit(), ns3::MinstrelWifiRemoteStation::m_initialized, ns3::MinstrelWifiRemoteStation::m_isSampling, ns3::MinstrelWifiRemoteStation::m_longRetry, ns3::MinstrelWifiRemoteStation::m_maxProbRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate2, m_minstrelTable, ns3::MinstrelWifiRemoteStation::m_sampleRate, ns3::MinstrelWifiRemoteStation::m_sampleRateSlower, ns3::MinstrelWifiRemoteStation::m_txrate, and NS_LOG_DEBUG.

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void ns3::MinstrelWifiManager::DoReportDataOk	(	WifiRemoteStation *	station,
		double	ackSnr,
		WifiMode	ackMode,
		double	dataSnr
	)

privatevirtual

Definition at line 382 of file minstrel-wifi-manager.cc.

References CheckInit(), FindRate(), ns3::MinstrelWifiRemoteStation::m_initialized, ns3::MinstrelWifiRemoteStation::m_isSampling, m_minstrelTable, m_nsupported, ns3::MinstrelWifiRemoteStation::m_packetCount, ns3::MinstrelWifiRemoteStation::m_retry, ns3::MinstrelWifiRemoteStation::m_sampleRateSlower, ns3::MinstrelWifiRemoteStation::m_txrate, and UpdateRetry().

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void ns3::MinstrelWifiManager::DoReportFinalDataFailed ( WifiRemoteStation * station )

privatevirtual

Definition at line 411 of file minstrel-wifi-manager.cc.

References FindRate(), ns3::MinstrelWifiRemoteStation::m_err, ns3::MinstrelWifiRemoteStation::m_isSampling, m_minstrelTable, m_nsupported, ns3::MinstrelWifiRemoteStation::m_retry, ns3::MinstrelWifiRemoteStation::m_sampleRateSlower, ns3::MinstrelWifiRemoteStation::m_txrate, NS_LOG_DEBUG, and UpdateRetry().

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void ns3::MinstrelWifiManager::DoReportFinalRtsFailed ( WifiRemoteStation * station )

privatevirtual

Definition at line 240 of file minstrel-wifi-manager.cc.

References ns3::MinstrelWifiRemoteStation::m_err, and UpdateRetry().

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void ns3::MinstrelWifiManager::DoReportRtsFailed ( WifiRemoteStation * station )

privatevirtual

Definition at line 225 of file minstrel-wifi-manager.cc.

References ns3::MinstrelWifiRemoteStation::m_shortRetry, ns3::MinstrelWifiRemoteStation::m_txrate, and NS_LOG_DEBUG.

void ns3::MinstrelWifiManager::DoReportRtsOk	(	WifiRemoteStation *	station,
		double	ctsSnr,
		WifiMode	ctsMode,
		double	rtsSnr
	)

privatevirtual

Definition at line 234 of file minstrel-wifi-manager.cc.

References NS_LOG_DEBUG.

void ns3::MinstrelWifiManager::DoReportRxOk	(	WifiRemoteStation *	station,
		double	rxSnr,
		WifiMode	txMode
	)

privatevirtual

Definition at line 218 of file minstrel-wifi-manager.cc.

References NS_LOG_DEBUG.

uint32_t ns3::MinstrelWifiManager::FindRate ( MinstrelWifiRemoteStation * station )

private

find a rate to use from Minstrel Table

for determining when to try a sample rate

if we are below the target of look around rate percentage, look around note: do it randomly by flipping a coin instead sampling all at once until it reaches the look around rate

now go through the table and find an index rate

This if condition is used to make sure that we don't need to use the sample rate it is the same as our current rate

start sample count

set flag that we are currently sampling

bookeeping for resetting stuff

error check

set the rate that we're currently sampling

is this rate slower than the current best rate

using the best rate instead

continue using the best rate

Definition at line 489 of file minstrel-wifi-manager.cc.

Referenced by DoReportDataOk(), and DoReportFinalDataFailed().

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Time ns3::MinstrelWifiManager::GetCalcTxTime ( WifiMode mode ) const

private

for estimating the TxTime of a packet with a given mode

Definition at line 153 of file minstrel-wifi-manager.cc.

References m_calcTxTime, NS_ASSERT, and ns3::Seconds().

Referenced by RateInit().

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uint32_t ns3::MinstrelWifiManager::GetNextSample ( MinstrelWifiRemoteStation * station )

private

getting the next sample from Sample Table

bookeeping for m_index and m_col variables

Definition at line 469 of file minstrel-wifi-manager.cc.

References ns3::MinstrelWifiRemoteStation::m_col, ns3::MinstrelWifiRemoteStation::m_index, m_nsupported, m_sampleCol, and m_sampleTable.

Referenced by FindRate().

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TypeId ns3::MinstrelWifiManager::GetTypeId ( void )

static

This method returns the TypeId associated to ns3::MinstrelWifiManager.

This object is accessible through the following paths with Config::Set and Config::Connect:

/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/RemoteStationManager/$ns3::MinstrelWifiManager

Attributes defined for this type:

UpdateStatistics: The interval between updating statistics table
- Set with class: TimeValue
- Underlying type: Time
- Initial value: +100000000.0ns
- Flags: construct write read
LookAroundRate: the percentage to try other rates
- Set with class: ns3::DoubleValue
- Underlying type: double -1.79769e+308:1.79769e+308
- Initial value: 10
- Flags: construct write read
EWMA: EWMA level
- Set with class: ns3::DoubleValue
- Underlying type: double -1.79769e+308:1.79769e+308
- Initial value: 75
- Flags: construct write read
SegmentSize: The largest allowable segment size packet
- Set with class: ns3::DoubleValue
- Underlying type: double -1.79769e+308:1.79769e+308
- Initial value: 6000
- Flags: construct write read
SampleColumn: The number of columns used for sampling
- Set with class: ns3::DoubleValue
- Underlying type: double -1.79769e+308:1.79769e+308
- Initial value: 10
- Flags: construct write read
PacketLength: The packet length used for calculating mode TxTime
- Set with class: ns3::DoubleValue
- Underlying type: double -1.79769e+308:1.79769e+308
- Initial value: 1200
- Flags: construct write read

Attributes defined in parent class ns3::WifiRemoteStationManager:

IsLowLatency: If true, we attempt to modelize a so-called low-latency device: a device where decisions about tx parameters can be made on a per-packet basis and feedback about the transmission of each packet is obtained before sending the next. Otherwise, we modelize a high-latency device, that is a device where we cannot update our decision about tx parameters after every packet transmission.
- Set with class: BooleanValue
- Underlying type: bool
- Flags: read
MaxSsrc: The maximum number of retransmission attempts for an RTS. This value will not have any effect on some rate control algorithms.
- Set with class: ns3::UintegerValue
- Underlying type: uint32_t 0:4294967295
- Initial value: 7
- Flags: construct write read
MaxSlrc: The maximum number of retransmission attempts for a DATA packet. This value will not have any effect on some rate control algorithms.
- Set with class: ns3::UintegerValue
- Underlying type: uint32_t 0:4294967295
- Initial value: 7
- Flags: construct write read
RtsCtsThreshold: If the size of the data packet + LLC header + MAC header + FCS trailer is bigger than this value, we use an RTS/CTS handshake before sending the data, as per IEEE Std. 802.11-2007, Section 9.2.6. This value will not have any effect on some rate control algorithms.
- Set with class: ns3::UintegerValue
- Underlying type: uint32_t 0:4294967295
- Initial value: 2346
- Flags: construct write read
FragmentationThreshold: If the size of the data packet + LLC header + MAC header + FCS trailer is biggerthan this value, we fragment it such that the size of the fragments are equal or smaller than this value, as per IEEE Std. 802.11-2007, Section 9.4. This value will not have any effect on some rate control algorithms.
- Set with class: ns3::UintegerValue
- Underlying type: uint32_t 0:4294967295
- Initial value: 2346
- Flags: construct write read
NonUnicastMode: Wifi mode used for non-unicast transmissions.
- Set with class: WifiModeValue
- Underlying type: WifiMode
- Initial value: Invalid-WifiMode
- Flags: construct write read

No TraceSources defined for this type.
TraceSources defined in parent class ns3::WifiRemoteStationManager:

MacTxRtsFailed: The transmission of a RTS by the MAC layer has failed
MacTxDataFailed: The transmission of a data packet by the MAC layer has failed
MacTxFinalRtsFailed: The transmission of a RTS has exceeded the maximum number of attempts
MacTxFinalDataFailed: The transmission of a data packet has exceeded the maximum number of attempts

Reimplemented from ns3::WifiRemoteStationManager.

Definition at line 82 of file minstrel-wifi-manager.cc.

References m_ewmaLevel, m_lookAroundRate, m_pktLen, m_sampleCol, m_segmentSize, m_updateStats, ns3::Seconds(), and ns3::TypeId::SetParent().

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void ns3::MinstrelWifiManager::InitSampleTable ( MinstrelWifiRemoteStation * station )

private

initialize Sample Table

for off-seting to make rates fall between 0 and numrates

The next two lines basically tries to generate a random number between 0 and the number of available rates

this loop is used for filling in other uninitilized places

Definition at line 739 of file minstrel-wifi-manager.cc.

References ns3::UniformRandomVariable::GetInteger(), ns3::MinstrelWifiRemoteStation::m_col, ns3::MinstrelWifiRemoteStation::m_index, m_nsupported, m_sampleCol, m_sampleTable, m_uniformRandomVariable, and NS_LOG_DEBUG.

Referenced by CheckInit().

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bool ns3::MinstrelWifiManager::IsLowLatency ( void ) const

privatevirtual

Definition at line 464 of file minstrel-wifi-manager.cc.

void ns3::MinstrelWifiManager::PrintSampleTable ( MinstrelWifiRemoteStation * station )

private

printing Sample Table

Definition at line 773 of file minstrel-wifi-manager.cc.

References m_nsupported, m_sampleCol, m_sampleTable, and NS_LOG_DEBUG.

void ns3::MinstrelWifiManager::PrintTable ( MinstrelWifiRemoteStation * station )

private

printing Minstrel Table

Definition at line 789 of file minstrel-wifi-manager.cc.

References m_minstrelTable, m_nsupported, and NS_LOG_DEBUG.

void ns3::MinstrelWifiManager::RateInit ( MinstrelWifiRemoteStation * station )

private

initialize Minstrel Table

Definition at line 717 of file minstrel-wifi-manager.cc.

References GetCalcTxTime(), ns3::WifiRemoteStationManager::GetSupported(), m_minstrelTable, m_nsupported, and NS_LOG_DEBUG.

Referenced by CheckInit(), and UpdateStats().

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void ns3::MinstrelWifiManager::SetupPhy ( Ptr< WifiPhy > phy )

virtual

Reimplemented from ns3::WifiRemoteStationManager.

Definition at line 133 of file minstrel-wifi-manager.cc.

References AddCalcTxTime(), ns3::WifiPhy::CalculateTxDuration(), ns3::WifiPhy::GetMode(), ns3::WifiPhy::GetNModes(), m_pktLen, and ns3::WIFI_PREAMBLE_LONG.

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void ns3::MinstrelWifiManager::UpdateRetry ( MinstrelWifiRemoteStation * station )

private

update the number of retries and reset accordingly

Definition at line 431 of file minstrel-wifi-manager.cc.

References ns3::MinstrelWifiRemoteStation::m_longRetry, ns3::MinstrelWifiRemoteStation::m_retry, and ns3::MinstrelWifiRemoteStation::m_shortRetry.

Referenced by DoReportDataOk(), DoReportFinalDataFailed(), and DoReportFinalRtsFailed().

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void ns3::MinstrelWifiManager::UpdateStats ( MinstrelWifiRemoteStation * station )

private

updating the Minstrel Table every 1/10 seconds

calculate the perfect tx time for this rate

just for initialization

if we've attempted something

calculate the probability of success assume probability scales from 0 to 18000

bookeeping

ewma probability (cast for gcc 3.4 compatibility)

calculating throughput

bookeeping

Sample less often below 10% and above 95% of success

retry count denotes the number of retries permitted for each rate

retry_count/2

if it's 0 allow one retry limit

go find max throughput, second maximum throughput, high probability succ

find the second highest max

reset it

Definition at line 577 of file minstrel-wifi-manager.cc.

References ns3::Time::GetMicroSeconds(), ns3::MinstrelWifiRemoteStation::m_currentRate, m_ewmaLevel, ns3::MinstrelWifiRemoteStation::m_initialized, ns3::MinstrelWifiRemoteStation::m_maxProbRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate2, m_minstrelTable, ns3::MinstrelWifiRemoteStation::m_nextStatsUpdate, m_nsupported, ns3::MinstrelWifiRemoteStation::m_txrate, m_updateStats, ns3::Now(), ns3::Simulator::Now(), NS_LOG_DEBUG, RateInit(), and ns3::Seconds().

Referenced by DoGetDataMode().

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Member Data Documentation

TxTime ns3::MinstrelWifiManager::m_calcTxTime

private

to hold all the calculated TxTime for all modes

Definition at line 160 of file minstrel-wifi-manager.h.

Referenced by AddCalcTxTime(), and GetCalcTxTime().

double ns3::MinstrelWifiManager::m_ewmaLevel

private

exponential weighted moving average

Definition at line 163 of file minstrel-wifi-manager.h.

Referenced by GetTypeId(), and UpdateStats().

double ns3::MinstrelWifiManager::m_lookAroundRate

private

the % to try other rates than our current rate

Definition at line 162 of file minstrel-wifi-manager.h.

Referenced by FindRate(), and GetTypeId().

MinstrelRate ns3::MinstrelWifiManager::m_minstrelTable

private

minstrel table

Definition at line 156 of file minstrel-wifi-manager.h.

Referenced by CheckInit(), DoReportDataFailed(), DoReportDataOk(), DoReportFinalDataFailed(), FindRate(), PrintTable(), RateInit(), and UpdateStats().

uint32_t ns3::MinstrelWifiManager::m_nsupported

private

modes supported

Definition at line 167 of file minstrel-wifi-manager.h.

Referenced by CheckInit(), DoGetDataMode(), DoReportDataOk(), DoReportFinalDataFailed(), FindRate(), GetNextSample(), InitSampleTable(), MinstrelWifiManager(), PrintSampleTable(), PrintTable(), RateInit(), and UpdateStats().

uint32_t ns3::MinstrelWifiManager::m_pktLen

private

packet length used for calculate mode TxTime

Definition at line 166 of file minstrel-wifi-manager.h.

Referenced by GetTypeId(), and SetupPhy().

uint32_t ns3::MinstrelWifiManager::m_sampleCol

private

number of sample columns

Definition at line 165 of file minstrel-wifi-manager.h.

Referenced by CheckInit(), GetNextSample(), GetTypeId(), InitSampleTable(), and PrintSampleTable().

SampleRate ns3::MinstrelWifiManager::m_sampleTable

private

sample table

Definition at line 157 of file minstrel-wifi-manager.h.

Referenced by CheckInit(), GetNextSample(), InitSampleTable(), and PrintSampleTable().

uint32_t ns3::MinstrelWifiManager::m_segmentSize

private

largest allowable segment size

Definition at line 164 of file minstrel-wifi-manager.h.

Referenced by GetTypeId().

Ptr<UniformRandomVariable> ns3::MinstrelWifiManager::m_uniformRandomVariable

private

Provides uniform random variables.

Definition at line 170 of file minstrel-wifi-manager.h.

Referenced by AssignStreams(), FindRate(), InitSampleTable(), and MinstrelWifiManager().

Time ns3::MinstrelWifiManager::m_updateStats

private

how frequent do we calculate the stats(1/10 seconds)

Definition at line 161 of file minstrel-wifi-manager.h.

Referenced by DoCreateStation(), GetTypeId(), and UpdateStats().

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

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Static Public Member Functions

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Private Attributes

Additional Inherited Members

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