Implementation of Minstrel-HT Rate Control Algorithm. More...

#include "minstrel-ht-wifi-manager.h"

Inheritance diagram for ns3::MinstrelHtWifiManager:

Collaboration diagram for ns3::MinstrelHtWifiManager:

Public Types
typedef void(*	RateChangeTracedCallback) (const uint64_t rate, const Mac48Address remoteAddress)
	TracedCallback signature for rate change events.

Public Types inherited from ns3::WifiRemoteStationManager
typedef void(*	PowerChangeTracedCallback) (double oldPower, double newPower, Mac48Address remoteAddress)
	TracedCallback signature for power change events.

enum	ProtectionMode { RTS_CTS , CTS_TO_SELF }
	ProtectionMode enumeration. More...

typedef void(*	RateChangeTracedCallback) (DataRate oldRate, DataRate newRate, Mac48Address remoteAddress)
	TracedCallback signature for rate change events.

using	Stations = std::unordered_map<Mac48Address, WifiRemoteStation*, WifiAddressHash>
	A map of WifiRemoteStations with Mac48Address as key.

using	StationStates
	A map of WifiRemoteStationStates with Mac48Address as key.

Public Member Functions
	MinstrelHtWifiManager ()

	~MinstrelHtWifiManager () override

int64_t	AssignStreams (int64_t stream) override
	Assign a fixed random variable stream number to the random variables used by this model.

void	SetupMac (const Ptr< WifiMac > mac) override
	Set up MAC associated with this device since it is the object that knows the full set of timing parameters (e.g.

void	SetupPhy (const Ptr< WifiPhy > phy) override
	Set up PHY associated with this device since it is the object that knows the full set of transmit rates that are supported.

Public Member Functions inherited from ns3::WifiRemoteStationManager
	WifiRemoteStationManager ()

	~WifiRemoteStationManager () override

void	AddAllSupportedMcs (Mac48Address address)
	Invoked in a STA or AP to store all of the MCS supported by a destination which is also supported locally.

void	AddAllSupportedModes (Mac48Address address)
	Invoked in a STA or AP to store all of the modes supported by a destination which is also supported locally.

void	AddBasicMcs (WifiMode mcs)
	Add a given Modulation and Coding Scheme (MCS) index to the set of basic MCS.

void	AddBasicMode (WifiMode mode)
	Invoked in a STA upon association to store the set of rates which belong to the BSSBasicRateSet of the associated AP and which are supported locally.

void	AddStationEhtCapabilities (Mac48Address from, EhtCapabilities ehtCapabilities)
	Records EHT capabilities of the remote station.

void	AddStationHe6GhzCapabilities (const Mac48Address &from, const He6GhzBandCapabilities &he6GhzCapabilities)
	Records HE 6 GHz Band Capabilities of a remote station.

void	AddStationHeCapabilities (Mac48Address from, HeCapabilities heCapabilities)
	Records HE capabilities of the remote station.

void	AddStationHtCapabilities (Mac48Address from, HtCapabilities htCapabilities)
	Records HT capabilities of the remote station.

void	AddStationMleCommonInfo (Mac48Address from, const std::shared_ptr< CommonInfoBasicMle > &mleCommonInfo)
	Records the Common Info field advertised by the given remote station in a Multi-Link Element.

void	AddStationVhtCapabilities (Mac48Address from, VhtCapabilities vhtCapabilities)
	Records VHT capabilities of the remote station.

void	AddSupportedErpSlotTime (Mac48Address address, bool isShortSlotTimeSupported)
	Record whether the short ERP slot time is supported by the station.

void	AddSupportedMcs (Mac48Address address, WifiMode mcs)
	Record the MCS index supported by the station.

void	AddSupportedMode (Mac48Address address, WifiMode mode)
	Invoked in a STA or AP to store the set of modes supported by a destination which is also supported locally.

void	AddSupportedPhyPreamble (Mac48Address address, bool isShortPreambleSupported)
	Record whether the short PHY preamble is supported by the station.

void	AdjustTxVectorForIcf (WifiTxVector &txVector) const
	Adjust the TXVECTOR for an initial Control frame to ensure that the modulation class is non-HT and the rate is 6 Mbps, 12 Mbps or 24 Mbps.

WifiTxVector	GetAckTxVector (Mac48Address to, const WifiTxVector &dataTxVector) const
	Return a TXVECTOR for the Ack frame given the destination and the mode of the Data used by the sender.

std::optional< Mac48Address >	GetAffiliatedStaAddress (const Mac48Address &mldAddress) const
	Get the address of the remote station operating on this link and affiliated with the MLD having the given MAC address, if any.

uint16_t	GetAssociationId (Mac48Address remoteAddress) const
	Get the AID of a remote station.

WifiMode	GetBasicMcs (uint8_t i) const
	Return the MCS at the given list index.

WifiMode	GetBasicMode (uint8_t i) const
	Return a basic mode from the set of basic modes.

WifiTxVector	GetBlockAckTxVector (Mac48Address to, const WifiTxVector &dataTxVector) const
	Return a TXVECTOR for the BlockAck frame given the destination and the mode of the Data used by the sender.

MHz_u	GetChannelWidthSupported (Mac48Address address) const
	Return the channel width supported by the station.

WifiMode	GetControlAnswerMode (WifiMode reqMode) const
	Get control answer mode function.

WifiTxVector	GetCtsToSelfTxVector ()
	Since CTS-to-self parameters are not dependent on the station, it is implemented in wifi remote station manager.

WifiTxVector	GetCtsTxVector (Mac48Address to, WifiMode rtsTxMode) const
	Return a TXVECTOR for the CTS frame given the destination and the mode of the RTS used by the sender.

WifiTxVector	GetDataTxVector (const WifiMacHeader &header, MHz_u allowedWidth)

WifiMode	GetDefaultMcs () const
	Return the default Modulation and Coding Scheme (MCS) index.

WifiMode	GetDefaultMode () const
	Return the default transmission mode.

WifiMode	GetDefaultModeForSta (const WifiRemoteStation *st) const
	Return the default MCS to use to transmit frames to the given station.

uint8_t	GetDefaultTxPowerLevel () const

bool	GetDsssSupported (const Mac48Address &address) const
	Return whether the station supports DSSS or not.

bool	GetEhtSupported () const
	Return whether the device has EHT capability support enabled.

bool	GetEhtSupported (Mac48Address address) const
	Return whether the station supports EHT or not.

bool	GetEmlsrEnabled (const Mac48Address &address) const

bool	GetEmlsrSupported (const Mac48Address &address) const

bool	GetErpOfdmSupported (const Mac48Address &address) const
	Return whether the station supports ERP OFDM or not.

uint32_t	GetFragmentationThreshold () const
	Return the fragmentation threshold.

uint32_t	GetFragmentOffset (Ptr< const WifiMpdu > mpdu, uint32_t fragmentNumber)

uint32_t	GetFragmentSize (Ptr< const WifiMpdu > mpdu, uint32_t fragmentNumber)

Time	GetGuardInterval () const
	Return the supported HE guard interval duration.

bool	GetHeSupported () const
	Return whether the device has HE capability support enabled.

bool	GetHeSupported (Mac48Address address) const
	Return whether the station supports HE or not.

bool	GetHtSupported () const
	Return whether the device has HT capability support enabled on the link this manager is associated with.

bool	GetHtSupported (Mac48Address address) const
	Return whether the station supports HT or not.

WifiRemoteStationInfo	GetInfo (Mac48Address address)

bool	GetLdpcSupported () const
	Return whether the device has LDPC support enabled.

bool	GetLdpcSupported (Mac48Address address) const
	Return whether the station supports LDPC or not.

Ptr< WifiMac >	GetMac () const
	Return the WifiMac.

uint8_t	GetMaxNumberOfTransmitStreams () const

std::optional< Mac48Address >	GetMldAddress (const Mac48Address &address) const
	Get the address of the MLD the given station is affiliated with, if any.

std::optional< dBm_u >	GetMostRecentRssi (Mac48Address address) const

uint8_t	GetNBasicMcs () const
	Return the number of basic MCS index.

uint8_t	GetNBasicModes () const
	Return the number of basic modes we support.

uint8_t	GetNMcsSupported (Mac48Address address) const
	Return the number of MCS supported by the station.

uint32_t	GetNNonErpBasicModes () const
	Return the number of non-ERP basic modes we support.

WifiMode	GetNonErpBasicMode (uint8_t i) const
	Return a basic mode from the set of basic modes that is not an ERP mode.

WifiMode	GetNonUnicastMode () const
	Return a mode for non-unicast packets.

uint8_t	GetNumberOfAntennas () const

uint8_t	GetNumberOfSupportedStreams (Mac48Address address) const
	Return the number of spatial streams supported by the station.

bool	GetOfdmSupported (const Mac48Address &address) const
	Return whether the station supports OFDM or not.

Ptr< WifiPhy >	GetPhy () const
	Return the WifiPhy.

bool	GetQosSupported (Mac48Address address) const
	Return whether the given station is QoS capable.

WifiTxVector	GetRtsTxVector (Mac48Address address, MHz_u allowedWidth)

bool	GetShortGuardIntervalSupported () const
	Return whether the device has SGI support enabled.

bool	GetShortGuardIntervalSupported (Mac48Address address) const
	Return whether the station supports HT/VHT short guard interval.

bool	GetShortPreambleEnabled () const
	Return whether the device uses short PHY preambles.

bool	GetShortPreambleSupported (Mac48Address address) const
	Return whether the station supports short PHY preamble or not.

bool	GetShortSlotTimeEnabled () const
	Return whether the device uses short slot time.

bool	GetShortSlotTimeSupported (Mac48Address address) const
	Return whether the station supports short ERP slot time or not.

Ptr< const EhtCapabilities >	GetStationEhtCapabilities (Mac48Address from)
	Return the EHT capabilities sent by the remote station.

std::optional< std::reference_wrapper< CommonInfoBasicMle::EmlCapabilities > >	GetStationEmlCapabilities (const Mac48Address &from)

Ptr< const He6GhzBandCapabilities >	GetStationHe6GhzCapabilities (const Mac48Address &from) const
	Return the HE 6 GHz Band Capabilities sent by a remote station.

Ptr< const HeCapabilities >	GetStationHeCapabilities (Mac48Address from)
	Return the HE capabilities sent by the remote station.

Ptr< const HtCapabilities >	GetStationHtCapabilities (Mac48Address from)
	Return the HT capabilities sent by the remote station.

std::optional< std::reference_wrapper< CommonInfoBasicMle::MldCapabilities > >	GetStationMldCapabilities (const Mac48Address &from)

Ptr< const VhtCapabilities >	GetStationVhtCapabilities (Mac48Address from)
	Return the VHT capabilities sent by the remote station.

bool	GetUseNonErpProtection () const
	Return whether the device supports protection of non-ERP stations.

bool	GetUseNonHtProtection () const
	Return whether the device supports protection of non-HT stations.

bool	GetVhtSupported () const
	Return whether the device has VHT capability support enabled on the link this manager is associated with.

bool	GetVhtSupported (Mac48Address address) const
	Return whether the station supports VHT or not.

bool	IsAssociated (Mac48Address address) const
	Return whether the station associated.

bool	IsAssocRefused (Mac48Address address) const
	Return whether we refused an association request from the given station.

bool	IsBrandNew (Mac48Address address) const
	Return whether the station state is brand new.

bool	IsInPsMode (const Mac48Address &address) const
	Return whether the STA is currently in Power Save mode.

bool	IsLastFragment (Ptr< const WifiMpdu > mpdu, uint32_t fragmentNumber)

bool	IsWaitAssocTxOk (Mac48Address address) const
	Return whether we are waiting for an ACK for the association response we sent.

bool	NeedCtsToSelf (WifiTxVector txVector)
	Return if we need to do CTS-to-self before sending a DATA.

bool	NeedFragmentation (Ptr< const WifiMpdu > mpdu)

bool	NeedRetransmission (Ptr< const WifiMpdu > mpdu)

bool	NeedRts (const WifiMacHeader &header, const WifiTxParameters &txParams)

void	RecordAssocRefused (Mac48Address address)
	Records that association request was refused.

void	RecordDisassociated (Mac48Address address)
	Records that the STA was disassociated.

void	RecordGotAssocTxFailed (Mac48Address address)
	Records that we missed an ACK for the association response we sent.

void	RecordGotAssocTxOk (Mac48Address address)
	Records that we got an ACK for the association response we sent.

void	RecordWaitAssocTxOk (Mac48Address address)
	Records that we are waiting for an ACK for the association response we sent.

void	RemoveAllSupportedMcs (Mac48Address address)
	Invoked in a STA or AP to delete all of the supported MCS by a destination.

void	ReportAmpduTxStatus (Mac48Address address, uint16_t nSuccessfulMpdus, uint16_t nFailedMpdus, double rxSnr, double dataSnr, WifiTxVector dataTxVector)
	Typically called per A-MPDU, either when a Block ACK was successfully received or when a BlockAckTimeout has elapsed.

void	ReportDataFailed (Ptr< const WifiMpdu > mpdu)
	Should be invoked whenever the AckTimeout associated to a transmission attempt expires.

void	ReportDataOk (Ptr< const WifiMpdu > mpdu, double ackSnr, WifiMode ackMode, double dataSnr, WifiTxVector dataTxVector)
	Should be invoked whenever we receive the ACK associated to a data packet we just sent.

void	ReportFinalDataFailed (Ptr< const WifiMpdu > mpdu)
	Should be invoked after calling ReportDataFailed if NeedRetransmission returns false.

void	ReportFinalRtsFailed (const WifiMacHeader &header)
	Should be invoked after calling ReportRtsFailed if NeedRetransmission returns false.

void	ReportRtsFailed (const WifiMacHeader &header)
	Should be invoked whenever the RtsTimeout associated to a transmission attempt expires.

void	ReportRtsOk (const WifiMacHeader &header, double ctsSnr, WifiMode ctsMode, double rtsSnr)
	Should be invoked whenever we receive the CTS associated to an RTS we just sent.

void	ReportRxOk (Mac48Address address, RxSignalInfo rxSignalInfo, WifiTxVector txVector)

void	Reset ()
	Reset the station, invoked in a STA upon dis-association or in an AP upon reboot.

void	SetAssociationId (Mac48Address remoteAddress, uint16_t aid)
	Record the AID of a remote station.

void	SetDefaultTxPowerLevel (uint8_t txPower)
	Set the default transmission power level.

void	SetEmlsrEnabled (const Mac48Address &from, bool emlsrEnabled)

void	SetFragmentationThreshold (uint32_t threshold)
	Sets a fragmentation threshold.

void	SetMaxSlrc (uint32_t maxSlrc)
	Sets the maximum STA long retry count (SLRC).

void	SetMaxSsrc (uint32_t maxSsrc)
	Sets the maximum STA short retry count (SSRC).

void	SetPsMode (const Mac48Address &address, bool isInPsMode)
	Register whether the STA is in Power Save mode or not.

void	SetQosSupport (Mac48Address from, bool qosSupported)
	Records QoS support of the remote station.

void	SetRtsCtsThreshold (uint32_t threshold)
	Sets the RTS threshold.

void	SetShortPreambleEnabled (bool enable)
	Enable or disable short PHY preambles.

void	SetShortSlotTimeEnabled (bool enable)
	Enable or disable short slot time.

void	SetUseNonErpProtection (bool enable)
	Enable or disable protection for non-ERP stations.

void	SetUseNonHtProtection (bool enable)
	Enable or disable protection for non-HT stations.

bool	UseLdpcForDestination (Mac48Address dest) const

Public Member Functions inherited from ns3::Object
	Object ()
	Constructor.

	~Object () override
	Destructor.

void	AggregateObject (Ptr< Object > other)
	Aggregate two Objects together.

void	Dispose ()
	Dispose of this Object.

AggregateIterator	GetAggregateIterator () const
	Get an iterator to the Objects aggregated to this one.

TypeId	GetInstanceTypeId () const override
	Get the most derived TypeId for this Object.

template<typename T >
Ptr< T >	GetObject () const
	Get a pointer to the requested aggregated Object.

template<>
Ptr< Object >	GetObject () const
	Specialization of () for objects of type ns3::Object.

template<typename T >
Ptr< T >	GetObject (TypeId tid) const
	Get a pointer to the requested aggregated Object by TypeId.

template<>
Ptr< Object >	GetObject (TypeId tid) const
	Specialization of (TypeId tid) for objects of type ns3::Object.

void	Initialize ()
	Invoke DoInitialize on all Objects aggregated to this one.

bool	IsInitialized () const
	Check if the object has been initialized.

void	UnidirectionalAggregateObject (Ptr< Object > other)
	Aggregate an Object to another Object.

Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	Default constructor.

	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor.

uint32_t	GetReferenceCount () const
	Get the reference count of the object.

SimpleRefCount &	operator= (const SimpleRefCount &o)
	Assignment operator.

void	Ref () const
	Increment the reference count.

void	Unref () const
	Decrement the reference count.

Public Member Functions inherited from ns3::ObjectBase
virtual	~ObjectBase ()
	Virtual destructor.

void	GetAttribute (std::string name, AttributeValue &value, bool permissive=false) const
	Get the value of an attribute, raising fatal errors if unsuccessful.

bool	GetAttributeFailSafe (std::string name, AttributeValue &value) const
	Get the value of an attribute without raising errors.

void	SetAttribute (std::string name, const AttributeValue &value)
	Set a single attribute, raising fatal errors if unsuccessful.

bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)
	Set a single attribute without raising errors.

bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)
	Connect a TraceSource to a Callback with a context.

bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
	Connect a TraceSource to a Callback without a context.

bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected with a context.

bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected without a context.

Static Public Member Functions
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::WifiRemoteStationManager
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId ()
	Register this type.

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId ()
	Get the type ID.

Private Member Functions
void	AddFirstMpduTxTime (uint8_t groupId, WifiMode mode, Time t)
	Save a TxTime to the vector of groups.

void	AddMpduTxTime (uint8_t groupId, WifiMode mode, Time t)
	Save a TxTime to the vector of groups.

double	CalculateEwmsd (double oldEwmsd, double currentProb, double ewmaProb, double weight)
	Perform EWMSD (Exponentially Weighted Moving Standard Deviation) calculation.

Time	CalculateMpduTxDuration (Ptr< WifiPhy > phy, uint8_t streams, Time gi, MHz_u chWidth, WifiMode mode, MpduType mpduType)
	Estimates the TxTime of a frame with a given mode and group (stream, guard interval and channel width).

void	CalculateRetransmits (MinstrelHtWifiRemoteStation *station, uint16_t index)
	Calculate the number of retransmissions to set for the index rate.

void	CalculateRetransmits (MinstrelHtWifiRemoteStation *station, uint8_t groupId, uint8_t rateId)
	Calculate the number of retransmissions to set for the (groupId, rateId) rate.

double	CalculateThroughput (MinstrelHtWifiRemoteStation *station, uint8_t groupId, uint8_t rateId, double ewmaProb)
	Return the average throughput of the MCS defined by groupId and rateId.

Time	CalculateTimeUnicastPacket (Time dataTransmissionTime, uint32_t shortRetries, uint32_t longRetries)
	Estimate the time to transmit the given packet with the given number of retries.

void	CheckInit (MinstrelHtWifiRemoteStation *station)
	Check for initializations.

uint32_t	CountRetries (MinstrelHtWifiRemoteStation *station)
	Count retries.

WifiRemoteStation *	DoCreateStation () const override

WifiTxVector	DoGetDataTxVector (WifiRemoteStation *station, MHz_u allowedWidth) override

WifiTxVector	DoGetRtsTxVector (WifiRemoteStation *station) override

void	DoInitialize () override
	Initialize() implementation.

bool	DoNeedRetransmission (WifiRemoteStation *st, Ptr< const Packet > packet, bool normally) override

void	DoReportAmpduTxStatus (WifiRemoteStation *station, uint16_t nSuccessfulMpdus, uint16_t nFailedMpdus, double rxSnr, double dataSnr, MHz_u dataChannelWidth, uint8_t dataNss) override
	Typically called per A-MPDU, either when a Block ACK was successfully received or when a BlockAckTimeout has elapsed.

void	DoReportDataFailed (WifiRemoteStation *station) override
	This method is a pure virtual method that must be implemented by the sub-class.

void	DoReportDataOk (WifiRemoteStation *station, double ackSnr, WifiMode ackMode, double dataSnr, MHz_u dataChannelWidth, uint8_t dataNss) override
	This method is a pure virtual method that must be implemented by the sub-class.

void	DoReportFinalDataFailed (WifiRemoteStation *station) override
	This method is a pure virtual method that must be implemented by the sub-class.

void	DoReportFinalRtsFailed (WifiRemoteStation *station) override
	This method is a pure virtual method that must be implemented by the sub-class.

void	DoReportRtsFailed (WifiRemoteStation *station) override
	This method is a pure virtual method that must be implemented by the sub-class.

void	DoReportRtsOk (WifiRemoteStation *station, double ctsSnr, WifiMode ctsMode, double rtsSnr) override
	This method is a pure virtual method that must be implemented by the sub-class.

void	DoReportRxOk (WifiRemoteStation *station, double rxSnr, WifiMode txMode) override
	This method is a pure virtual method that must be implemented by the sub-class.

uint16_t	FindRate (MinstrelHtWifiRemoteStation *station)
	Find a rate to use from Minstrel Table.

Time	GetFirstMpduTxTime (uint8_t groupId, WifiMode mode) const
	Obtain the TxTime saved in the group information.

uint8_t	GetGroupId (uint16_t index)
	Return the groupId from the global index.

WifiModeList	GetHeDeviceMcsList () const
	Returns a list of only the HE MCS supported by the device.

uint8_t	GetHeGroupId (uint8_t txstreams, Time guardInterval, MHz_u chWidth)
	Returns the groupId of an HE MCS with the given number of streams, GI and channel width used.

WifiModeList	GetHtDeviceMcsList () const
	Returns a list of only the HT MCS supported by the device.

uint8_t	GetHtGroupId (uint8_t txstreams, Time guardInterval, MHz_u chWidth)
	Returns the groupId of an HT MCS with the given number of streams, GI and channel width used.

uint16_t	GetIndex (uint8_t groupId, uint8_t rateId)
	Returns the global index corresponding to the groupId and rateId.

uint16_t	GetLowestIndex (MinstrelHtWifiRemoteStation *station)
	Returns the lowest global index of the rates supported by the station.

uint16_t	GetLowestIndex (MinstrelHtWifiRemoteStation *station, uint8_t groupId)
	Returns the lowest global index of the rates supported by in the group.

Time	GetMpduTxTime (uint8_t groupId, WifiMode mode) const
	Obtain the TxTime saved in the group information.

uint16_t	GetNextSample (MinstrelHtWifiRemoteStation *station)
	Getting the next sample from Sample Table.

uint8_t	GetRateId (uint16_t index)
	Return the rateId inside a group, from the global index.

WifiModeList	GetVhtDeviceMcsList () const
	Returns a list of only the VHT MCS supported by the device.

uint8_t	GetVhtGroupId (uint8_t txstreams, Time guardInterval, MHz_u chWidth)
	Returns the groupId of a VHT MCS with the given number of streams, GI and channel width used.

void	InitSampleTable (MinstrelHtWifiRemoteStation *station)
	Initialize Sample Table.

bool	IsValidMcs (Ptr< WifiPhy > phy, uint8_t streams, MHz_u chWidth, WifiMode mode)
	Check the validity of a combination of number of streams, chWidth and mode.

void	PrintSampleTable (MinstrelHtWifiRemoteStation *station)
	Printing Sample Table.

void	PrintTable (MinstrelHtWifiRemoteStation *station)
	Printing Minstrel Table.

void	RateInit (MinstrelHtWifiRemoteStation *station)
	Initialize Minstrel Table.

void	SetBestProbabilityRate (MinstrelHtWifiRemoteStation *station, uint16_t index)
	Set index rate as maxProbRate if it is better than current value.

void	SetBestStationThRates (MinstrelHtWifiRemoteStation *station, uint16_t index)
	Set index rate as maxTpRate or maxTp2Rate if is better than current values.

void	SetNextSample (MinstrelHtWifiRemoteStation *station)
	Set the next sample from Sample Table.

void	StatsDump (MinstrelHtWifiRemoteStation *station, uint8_t groupId, std::ofstream &of)
	Print group statistics.

void	UpdatePacketCounters (MinstrelHtWifiRemoteStation *station, uint16_t nSuccessfulMpdus, uint16_t nFailedMpdus)
	Update the number of sample count variables.

void	UpdateRate (MinstrelHtWifiRemoteStation *station)
	Update rate.

uint16_t	UpdateRateAfterAllowedWidth (uint16_t txRate, MHz_u allowedWidth)
	Given the index of the current TX rate, check whether the channel width is not greater than the given allowed width.

void	UpdateRetry (MinstrelHtWifiRemoteStation *station)
	Update the number of retries and reset accordingly.

void	UpdateStats (MinstrelHtWifiRemoteStation *station)
	Update the Minstrel Table.

Private Attributes
TracedValue< uint64_t >	m_currentRate
	Trace rate changes.

uint8_t	m_ewmaLevel
	Exponential weighted moving average level (or coefficient).

uint32_t	m_frameLength
	Frame length used to calculate modes TxTime in bytes.

Ptr< MinstrelWifiManager >	m_legacyManager
	Pointer to an instance of MinstrelWifiManager.

Time	m_legacyUpdateStats
	How frequent do we calculate the stats for legacy MinstrelWifiManager.

uint8_t	m_lookAroundRate
	The % to try other rates than our current rate.

MinstrelMcsGroups	m_minstrelGroups
	Global array for groups information.

uint8_t	m_nSampleCol
	Number of sample columns.

uint8_t	m_numGroups
	Number of groups Minstrel should consider.

uint8_t	m_numRates
	Number of rates per group Minstrel should consider.

bool	m_printStats
	If statistics table should be printed.

Ptr< UniformRandomVariable >	m_uniformRandomVariable
	Provides uniform random variables.

Time	m_updateStats
	How frequent do we calculate the stats.

bool	m_useLatestAmendmentOnly
	Flag if only the latest supported amendment by both peers should be used.

Additional Inherited Members
Protected Member Functions inherited from ns3::WifiRemoteStationManager
void	DoDispose () override
	Destructor implementation.

Mac48Address	GetAddress (const WifiRemoteStation *station) const
	Return the address of the station.

bool	GetAggregation (const WifiRemoteStation *station) const
	Return whether the given station supports A-MPDU.

MHz_u	GetChannelWidth (const WifiRemoteStation *station) const
	Return the channel width supported by the station.

bool	GetEhtSupported (const WifiRemoteStation *station) const
	Return whether the given station is EHT capable.

bool	GetEmlsrEnabled (const WifiRemoteStation *station) const

bool	GetEmlsrSupported (const WifiRemoteStation *station) const

Time	GetGuardInterval (const WifiRemoteStation *station) const
	Return the HE guard interval duration supported by the station.

bool	GetHeSupported (const WifiRemoteStation *station) const
	Return whether the given station is HE capable.

bool	GetHtSupported (const WifiRemoteStation *station) const
	Return whether the given station is HT capable.

WifiMode	GetMcsSupported (const WifiRemoteStation *station, uint8_t i) const
	Return the WifiMode supported by the specified station at the specified index.

uint8_t	GetNess (const WifiRemoteStation *station) const

uint8_t	GetNMcsSupported (const WifiRemoteStation *station) const
	Return the number of MCS supported by the given station.

uint32_t	GetNNonErpSupported (const WifiRemoteStation *station) const
	Return the number of non-ERP modes supported by the given station.

WifiMode	GetNonErpSupported (const WifiRemoteStation *station, uint8_t i) const
	Return whether non-ERP mode associated with the specified station at the specified index.

uint8_t	GetNSupported (const WifiRemoteStation *station) const
	Return the number of modes supported by the given station.

uint8_t	GetNumberOfSupportedStreams (const WifiRemoteStation *station) const
	Return the number of supported streams the station has.

bool	GetQosSupported (const WifiRemoteStation *station) const
	Return whether the given station is QoS capable.

bool	GetShortGuardIntervalSupported (const WifiRemoteStation *station) const
	Return whether the given station supports HT/VHT short guard interval.

WifiMode	GetSupported (const WifiRemoteStation *station, uint8_t i) const
	Return whether mode associated with the specified station at the specified index.

bool	GetVhtSupported (const WifiRemoteStation *station) const
	Return whether the given station is VHT capable.

Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
	Copy an Object.

virtual void	NotifyNewAggregate ()
	Notify all Objects aggregated to this one of a new Object being aggregated.

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
	Complete construction of ObjectBase; invoked by derived classes.

virtual void	NotifyConstructionCompleted ()
	Notifier called once the ObjectBase is fully constructed.

Related Symbols inherited from ns3::ObjectBase
static TypeId	GetObjectIid ()
	Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly.

Detailed Description

Implementation of Minstrel-HT Rate Control Algorithm.

Minstrel-HT is a rate adaptation mechanism for the 802.11n/ac/ax standards based on Minstrel, and is based on the approach of probing the channel to dynamically learn about working rates that can be supported. Minstrel-HT is designed for high-latency devices that implement a Multiple Rate Retry (MRR) chain. This kind of device does not give feedback for every frame retransmission, but only when a frame was correctly transmitted (an Ack is received) or a frame transmission completely fails (all retransmission attempts fail). The MRR chain is used to advise the hardware about which rate to use when retransmitting a frame.

Minstrel-HT adapts the MCS, channel width, number of streams, and short guard interval (enabled or disabled). For keeping statistics, it arranges MCS in groups, where each group is defined by the tuple (streams, GI, channel width). There is a vector of all groups supported by the PHY layer of the transmitter; for each group, the capabilities and the estimated duration of its rates are maintained.

Each station maintains a table of groups statistics. For each group, a flag indicates if the group is supported by the station. Different stations communicating with an AP can have different capabilities.

Stats are updated per A-MPDU when receiving AmpduTxStatus. If the number of successful or failed MPDUs is greater than zero (a BlockAck was received), the rates are also updated. If the number of successful and failed MPDUs is zero (BlockAck timeout), then the rate selected is based on the MRR chain.

On each update interval, it sets the maxThrRate, the secondmaxThrRate and the maxProbRate for the MRR chain. These rates are only used when an entire A-MPDU fails and is retried.

Differently from legacy minstrel, sampling is not done based on "lookaround ratio", but assuring all rates are sampled at least once each interval. However, it samples less often the low rates and high probability of error rates.

When this rate control is configured but non-legacy modes are not supported, Minstrel-HT uses legacy Minstrel (minstrel-wifi-manager) for rate control.

Definition at line 225 of file minstrel-ht-wifi-manager.h.

Member Typedef Documentation

◆ RateChangeTracedCallback

typedef void(* ns3::MinstrelHtWifiManager::RateChangeTracedCallback) (const uint64_t rate, const Mac48Address remoteAddress)

TracedCallback signature for rate change events.

Parameters

[in]	rate	The new rate.
[in]	address	The remote station MAC address.

Definition at line 246 of file minstrel-ht-wifi-manager.h.

Constructor & Destructor Documentation

◆ MinstrelHtWifiManager()

ns3::MinstrelHtWifiManager::MinstrelHtWifiManager ( )

Create the legacy Minstrel manager in case HT is not supported by the device or non-HT stations want to associate.

Definition at line 123 of file minstrel-ht-wifi-manager.cc.

References ns3::CreateObject(), m_legacyManager, m_uniformRandomVariable, and NS_LOG_FUNCTION.

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◆ ~MinstrelHtWifiManager()

ns3::MinstrelHtWifiManager::~MinstrelHtWifiManager ( )

override

Definition at line 137 of file minstrel-ht-wifi-manager.cc.

References m_minstrelGroups, m_numGroups, and NS_LOG_FUNCTION.

Member Function Documentation

◆ AddFirstMpduTxTime()

void ns3::MinstrelHtWifiManager::AddFirstMpduTxTime	(	uint8_t	groupId,
		WifiMode	mode,
		Time	t )

private

Save a TxTime to the vector of groups.

Parameters

groupId	the group ID
mode	the wifi mode
t	the transmit time

Definition at line 449 of file minstrel-ht-wifi-manager.cc.

References m_minstrelGroups, and NS_LOG_FUNCTION.

Referenced by DoInitialize().

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◆ AddMpduTxTime()

void ns3::MinstrelHtWifiManager::AddMpduTxTime	(	uint8_t	groupId,
		WifiMode	mode,
		Time	t )

private

Save a TxTime to the vector of groups.

Parameters

groupId	the group ID
mode	the wifi mode
t	the transmit time

Definition at line 465 of file minstrel-ht-wifi-manager.cc.

References m_minstrelGroups, and NS_LOG_FUNCTION.

Referenced by DoInitialize().

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◆ AssignStreams()

int64_t ns3::MinstrelHtWifiManager::AssignStreams ( int64_t stream )

overridevirtual

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

Reimplemented from ns3::WifiRemoteStationManager.

Definition at line 148 of file minstrel-ht-wifi-manager.cc.

References m_legacyManager, m_uniformRandomVariable, and NS_LOG_FUNCTION.

◆ CalculateEwmsd()

double ns3::MinstrelHtWifiManager::CalculateEwmsd	(	double	oldEwmsd,
		double	currentProb,
		double	ewmaProb,
		double	weight )

private

Perform EWMSD (Exponentially Weighted Moving Standard Deviation) calculation.

Parameters

oldEwmsd	the old EWMSD
currentProb	the current probability
ewmaProb	the EWMA probability
weight	the weight

Returns: the EWMSD

Definition at line 1927 of file minstrel-ht-wifi-manager.cc.

Referenced by UpdateStats().

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◆ CalculateMpduTxDuration()

Time ns3::MinstrelHtWifiManager::CalculateMpduTxDuration	(	Ptr< WifiPhy >	phy,
		uint8_t	streams,
		Time	gi,
		MHz_u	chWidth,
		WifiMode	mode,
		MpduType	mpduType )

private

Estimates the TxTime of a frame with a given mode and group (stream, guard interval and channel width).

Parameters

phy	pointer to the wifi PHY
streams	the number of streams
gi	guard interval duration
chWidth	the channel width
mode	the wifi mode
mpduType	the type of the MPDU

Returns: the transmit time

Definition at line 419 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiPhy::CalculatePhyPreambleAndHeaderDuration(), ns3::WifiPhy::GetPayloadDuration(), m_frameLength, NS_LOG_FUNCTION, ns3::WifiTxVector::SetChannelWidth(), ns3::WifiTxVector::SetGuardInterval(), ns3::WifiTxVector::SetMode(), ns3::WifiTxVector::SetNess(), ns3::WifiTxVector::SetNss(), ns3::WifiTxVector::SetPreambleType(), ns3::WifiTxVector::SetStbc(), and ns3::WIFI_PREAMBLE_HT_MF.

Referenced by DoInitialize().

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◆ CalculateRetransmits() [1/2]

void ns3::MinstrelHtWifiManager::CalculateRetransmits	(	MinstrelHtWifiRemoteStation *	station,
		uint16_t	index )

private

Calculate the number of retransmissions to set for the index rate.

Parameters

station	the Minstrel-HT wifi remote station
index	the index

Definition at line 1857 of file minstrel-ht-wifi-manager.cc.

References CalculateRetransmits(), GetGroupId(), GetRateId(), ns3::MinstrelHtWifiRemoteStation::m_groupsTable, and NS_LOG_FUNCTION.

Referenced by CalculateRetransmits(), RateInit(), and UpdateStats().

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◆ CalculateRetransmits() [2/2]

void ns3::MinstrelHtWifiManager::CalculateRetransmits	(	MinstrelHtWifiRemoteStation *	station,
		uint8_t	groupId,
		uint8_t	rateId )

private

Calculate the number of retransmissions to set for the (groupId, rateId) rate.

Parameters

station	the Minstrel-HT wifi remote station
groupId	the group ID
rateId	the rate ID

Definition at line 1869 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiPhy::GetBlockAckTxTime(), GetFirstMpduTxTime(), ns3::WifiRemoteStationManager::GetMcsSupported(), GetMpduTxTime(), ns3::WifiRemoteStationManager::GetPhy(), ns3::WifiPhy::GetSifs(), ns3::WifiPhy::GetSlot(), ns3::MinstrelHtWifiRemoteStation::m_avgAmpduLen, ns3::MinstrelHtWifiRemoteStation::m_groupsTable, ns3::MilliSeconds(), Min, and NS_LOG_FUNCTION.

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◆ CalculateThroughput()

double ns3::MinstrelHtWifiManager::CalculateThroughput	(	MinstrelHtWifiRemoteStation *	station,
		uint8_t	groupId,
		uint8_t	rateId,
		double	ewmaProb )

private

Return the average throughput of the MCS defined by groupId and rateId.

Parameters

station	the Minstrel-HT wifi remote station
groupId	the group ID
rateId	the rate ID
ewmaProb	the EWMA probability

Returns: the throughput in bps

Calculating throughput. Do not account throughput if probability of success is below 10% (as done in minstrel_ht linux implementation).

For the throughput calculation, limit the probability value to 90% to account for collision related packet error rate fluctuation.

Definition at line 1536 of file minstrel-ht-wifi-manager.cc.

References ns3::Time::GetSeconds(), and ns3::MinstrelHtWifiRemoteStation::m_groupsTable.

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◆ CalculateTimeUnicastPacket()

Time ns3::MinstrelHtWifiManager::CalculateTimeUnicastPacket	(	Time	dataTransmissionTime,
		uint32_t	shortRetries,
		uint32_t	longRetries )

private

Estimate the time to transmit the given packet with the given number of retries.

This function is "roughly" the function "calc_usecs_unicast_packet" in minstrel.c in the madwifi implementation.

The basic idea is that, we try to estimate the "average" time used to transmit the packet for the given number of retries while also accounting for the 802.11 congestion window change. The original code in the madwifi seems to estimate the number of backoff slots as the half of the current CW size.

There are four main parts:

wait for DIFS (sense idle channel)
Ack timeouts
Data transmission
backoffs according to CW

Parameters

dataTransmissionTime	the data transmission time
shortRetries	the short retries
longRetries	the long retries

Returns: the unicast packet time

◆ CheckInit()

void ns3::MinstrelHtWifiManager::CheckInit ( MinstrelHtWifiRemoteStation * station )

private

Check for initializations.

Parameters

station the Minstrel-HT wifi remote station

Check if the station supports HT. Assume that if the device do not supports HT then the station will not support HT either. We save from using another check and variable.

Definition at line 514 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiRemoteStationManager::GetHtSupported(), ns3::WifiRemoteStationManager::GetNMcsSupported(), ns3::WifiRemoteStationManager::GetStationHe6GhzCapabilities(), InitSampleTable(), ns3::WifiRemoteStationState::m_address, m_ewmaLevel, m_frameLength, ns3::MinstrelWifiRemoteStation::m_initialized, ns3::MinstrelHtWifiRemoteStation::m_isHt, m_legacyManager, m_legacyUpdateStats, m_lookAroundRate, ns3::MinstrelWifiRemoteStation::m_minstrelTable, ns3::MinstrelWifiRemoteStation::m_nModes, m_nSampleCol, m_numRates, m_printStats, ns3::MinstrelWifiRemoteStation::m_sampleTable, ns3::WifiRemoteStation::m_state, NS_LOG_DEBUG, NS_LOG_FUNCTION, NS_LOG_INFO, and RateInit().

Referenced by DoGetDataTxVector(), DoGetRtsTxVector(), DoNeedRetransmission(), DoReportAmpduTxStatus(), DoReportDataFailed(), DoReportDataOk(), DoReportFinalDataFailed(), DoReportFinalRtsFailed(), DoReportRtsFailed(), and UpdateRate().

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◆ CountRetries()

uint32_t ns3::MinstrelHtWifiManager::CountRetries ( MinstrelHtWifiRemoteStation * station )

private

Count retries.

Parameters

station the Minstrel-HT wifi remote station

Returns: the count of retries

Definition at line 1217 of file minstrel-ht-wifi-manager.cc.

References GetGroupId(), GetRateId(), ns3::MinstrelHtWifiRemoteStation::m_groupsTable, ns3::MinstrelWifiRemoteStation::m_isSampling, ns3::MinstrelWifiRemoteStation::m_maxProbRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate, and ns3::MinstrelWifiRemoteStation::m_maxTpRate2.

Referenced by DoNeedRetransmission(), DoReportAmpduTxStatus(), and DoReportDataFailed().

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◆ DoCreateStation()

WifiRemoteStation * ns3::MinstrelHtWifiManager::DoCreateStation ( ) const

overrideprivatevirtual

Returns: a new station data structure

Implements ns3::WifiRemoteStationManager.

Definition at line 472 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiPhy::GetDevice(), ns3::WifiRemoteStationManager::GetPhy(), m_updateStats, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

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◆ DoGetDataTxVector()

WifiTxVector ns3::MinstrelHtWifiManager::DoGetDataTxVector	(	WifiRemoteStation *	station,
		MHz_u	allowedWidth )

overrideprivatevirtual

Parameters

station	the station that we need to communicate
allowedWidth	the allowed width to send a packet to the station

Returns: the TXVECTOR to use to send a packet to the station

Note: This method is called before sending a unicast packet or a fragment of a unicast packet to decide which transmission mode to use.

Implements ns3::WifiRemoteStationManager.

Definition at line 1024 of file minstrel-ht-wifi-manager.cc.

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◆ DoGetRtsTxVector()

WifiTxVector ns3::MinstrelHtWifiManager::DoGetRtsTxVector ( WifiRemoteStation * station )

overrideprivatevirtual

Parameters

station the station that we need to communicate

Returns: the transmission mode to use to send an RTS to the station

Note: This method is called before sending an RTS to a station to decide which transmission mode to use for the RTS.

Implements ns3::WifiRemoteStationManager.

Definition at line 1094 of file minstrel-ht-wifi-manager.cc.

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◆ DoInitialize()

void ns3::MinstrelHtWifiManager::DoInitialize ( )

overrideprivatevirtual

Initialize() implementation.

This method is called only once by Initialize(). If the user calls Initialize() multiple times, DoInitialize() is called only the first time.

Subclasses are expected to override this method and chain up to their parent's implementation once they are done. It is safe to call GetObject() and AggregateObject() from within this method.

Here we initialize m_minstrelGroups with all the possible groups. If a group is not supported by the device, then it is marked as not supported. Then, after all initializations are finished, we check actual support for each receiving station.

Initialize the groups array. The HT groups come first, then the VHT ones, and finally the HE ones. Minstrel maintains different types of indexes:

A global continuous index, which identifies all rates within all groups, in [0, m_numGroups * m_numRates]
A groupId, which indexes a group in the array, in [0, m_numGroups]
A rateId, which identifies a rate within a group, in [0, m_numRates]
A deviceIndex, which indexes a MCS in the PHY MCS array.
A mcsIndex, which indexes a MCS in the wifi-remote-station-manager supported MCSs array.

Is SGI supported by the transmitter?

Is channel width supported by the transmitter?

Are streams supported by the transmitter?

Is SGI supported by the transmitter?

Is channel width supported by the transmitter?

Are streams supported by the transmitter?

Is GI supported by the transmitter?

Is channel width supported by the transmitter?

Are streams supported by the transmitter?

Reimplemented from ns3::Object.

Definition at line 176 of file minstrel-ht-wifi-manager.cc.

References AddFirstMpduTxTime(), AddMpduTxTime(), CalculateMpduTxDuration(), ns3::FIRST_MPDU_IN_AGGREGATE, ns3::WifiRemoteStationManager::GetChannelWidth(), ns3::WifiRemoteStationManager::GetGuardInterval(), GetHeDeviceMcsList(), GetHeGroupId(), ns3::WifiRemoteStationManager::GetHeSupported(), GetHtDeviceMcsList(), GetHtGroupId(), ns3::WifiRemoteStationManager::GetHtSupported(), ns3::WifiRemoteStationManager::GetPhy(), ns3::WifiRemoteStationManager::GetShortGuardIntervalSupported(), GetVhtDeviceMcsList(), GetVhtGroupId(), ns3::WifiRemoteStationManager::GetVhtSupported(), IsValidMcs(), m_minstrelGroups, m_numGroups, m_numRates, ns3::MAX_HE_GROUP_RATES, ns3::MAX_HE_STREAM_GROUPS, ns3::MAX_HE_SUPPORTED_STREAMS, ns3::MAX_HE_WIDTH, ns3::MAX_HT_GROUP_RATES, ns3::MAX_HT_STREAM_GROUPS, ns3::MAX_HT_SUPPORTED_STREAMS, ns3::MAX_HT_WIDTH, ns3::MAX_VHT_GROUP_RATES, ns3::MAX_VHT_STREAM_GROUPS, ns3::MAX_VHT_SUPPORTED_STREAMS, ns3::MAX_VHT_WIDTH, ns3::MIDDLE_MPDU_IN_AGGREGATE, ns3::NanoSeconds(), NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::WIFI_MINSTREL_GROUP_HE, ns3::WIFI_MINSTREL_GROUP_HT, and ns3::WIFI_MINSTREL_GROUP_VHT.

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◆ DoNeedRetransmission()

bool ns3::MinstrelHtWifiManager::DoNeedRetransmission	(	WifiRemoteStation *	station,
		Ptr< const Packet >	packet,
		bool	normally )

overrideprivatevirtual

Parameters

station	the station that we need to communicate
packet	the packet to send
normally	indicates whether the normal 802.11 data retransmission mechanism would request that the data is retransmitted or not.

Returns: true if we want to resend a packet after a failed transmission attempt, false otherwise.

Note: This method is called after any unicast packet transmission (control, management, or data) has been attempted and has failed.

Reimplemented from ns3::WifiRemoteStationManager.

Definition at line 1177 of file minstrel-ht-wifi-manager.cc.

References CheckInit(), CountRetries(), m_legacyManager, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

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◆ DoReportAmpduTxStatus()

void ns3::MinstrelHtWifiManager::DoReportAmpduTxStatus	(	WifiRemoteStation *	station,
		uint16_t	nSuccessfulMpdus,
		uint16_t	nFailedMpdus,
		double	rxSnr,
		double	dataSnr,
		MHz_u	dataChannelWidth,
		uint8_t	dataNss )

overrideprivatevirtual

Typically called per A-MPDU, either when a Block ACK was successfully received or when a BlockAckTimeout has elapsed.

This method is a virtual method that must be implemented by the sub-class intended to handle A-MPDUs. This allows different types of WifiRemoteStationManager to respond differently.

Parameters

station	the station that sent the DATA to us
nSuccessfulMpdus	number of successfully transmitted MPDUs. A value of 0 means that the Block ACK was missed.
nFailedMpdus	number of unsuccessfuly transmitted MPDUs.
rxSnr	received SNR of the block ack frame itself
dataSnr	data SNR reported by remote station
dataChannelWidth	the channel width of the A-MPDU we sent
dataNss	the number of spatial streams used to send the A-MPDU

Reimplemented from ns3::WifiRemoteStationManager.

Definition at line 764 of file minstrel-ht-wifi-manager.cc.

References CheckInit(), CountRetries(), FindRate(), GetGroupId(), GetRateId(), ns3::Simulator::Now(), NS_ASSERT_MSG, NS_LOG_DEBUG, NS_LOG_FUNCTION, UpdatePacketCounters(), UpdateRate(), UpdateRetry(), and UpdateStats().

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◆ DoReportDataFailed()

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

overrideprivatevirtual

This method is a pure virtual method that must be implemented by the sub-class.

This allows different types of WifiRemoteStationManager to respond differently,

Parameters

station the station that we failed to send DATA

Implements ns3::WifiRemoteStationManager.

Definition at line 601 of file minstrel-ht-wifi-manager.cc.

References CheckInit(), CountRetries(), GetGroupId(), GetRateId(), m_legacyManager, NS_LOG_DEBUG, NS_LOG_FUNCTION, and UpdateRate().

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◆ DoReportDataOk()

void ns3::MinstrelHtWifiManager::DoReportDataOk	(	WifiRemoteStation *	station,
		double	ackSnr,
		WifiMode	ackMode,
		double	dataSnr,
		MHz_u	dataChannelWidth,
		uint8_t	dataNss )

overrideprivatevirtual

This method is a pure virtual method that must be implemented by the sub-class.

This allows different types of WifiRemoteStationManager to respond differently,

Parameters

station	the station that we successfully sent RTS
ackSnr	the SNR of the ACK we received
ackMode	the WifiMode the receiver used to send the ACK
dataSnr	the SNR of the DATA we sent
dataChannelWidth	the channel width of the DATA we sent
dataNss	the number of spatial streams used to send the DATA

Implements ns3::WifiRemoteStationManager.

Definition at line 631 of file minstrel-ht-wifi-manager.cc.

References CheckInit(), FindRate(), GetGroupId(), GetRateId(), m_legacyManager, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, UpdatePacketCounters(), UpdateRetry(), and UpdateStats().

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◆ DoReportFinalDataFailed()

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

overrideprivatevirtual

This method is a pure virtual method that must be implemented by the sub-class.

This allows different types of WifiRemoteStationManager to respond differently,

Parameters

station the station that we failed to send DATA

Implements ns3::WifiRemoteStationManager.

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

References CheckInit(), FindRate(), m_legacyManager, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, UpdatePacketCounters(), UpdateRetry(), and UpdateStats().

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◆ DoReportFinalRtsFailed()

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

overrideprivatevirtual

This method is a pure virtual method that must be implemented by the sub-class.

This allows different types of WifiRemoteStationManager to respond differently,

Parameters

station the station that we failed to send RTS

Implements ns3::WifiRemoteStationManager.

Definition at line 587 of file minstrel-ht-wifi-manager.cc.

References CheckInit(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and UpdateRetry().

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◆ DoReportRtsFailed()

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

overrideprivatevirtual

This method is a pure virtual method that must be implemented by the sub-class.

This allows different types of WifiRemoteStationManager to respond differently,

Parameters

station the station that we failed to send RTS

Implements ns3::WifiRemoteStationManager.

Definition at line 564 of file minstrel-ht-wifi-manager.cc.

References CheckInit(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

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◆ DoReportRtsOk()

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

overrideprivatevirtual

This method is a pure virtual method that must be implemented by the sub-class.

This allows different types of WifiRemoteStationManager to respond differently,

Parameters

station	the station that we successfully sent RTS
ctsSnr	the SNR of the CTS we received
ctsMode	the WifiMode the receiver used to send the CTS
rtsSnr	the SNR of the RTS we sent

Implements ns3::WifiRemoteStationManager.

Definition at line 578 of file minstrel-ht-wifi-manager.cc.

References NS_LOG_FUNCTION.

◆ DoReportRxOk()

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

overrideprivatevirtual

This method is a pure virtual method that must be implemented by the sub-class.

This allows different types of WifiRemoteStationManager to respond differently,

Parameters

station	the station that sent the DATA to us
rxSnr	the SNR of the DATA we received
txMode	the WifiMode the sender used to send the DATA

Implements ns3::WifiRemoteStationManager.

Definition at line 556 of file minstrel-ht-wifi-manager.cc.

References NS_LOG_DEBUG, and NS_LOG_FUNCTION.

◆ FindRate()

uint16_t ns3::MinstrelHtWifiManager::FindRate ( MinstrelHtWifiRemoteStation * station )

private

Find a rate to use from Minstrel Table.

Parameters

station the Minstrel-HT wifi remote station

Returns: the rate in bps

Now go through the table and find an index rate.

Sampling might add some overhead to the frame. Hence, don't use sampling for the currently used rates.

Also do not sample if the probability is already higher than 95% to avoid wasting airtime.

Make sure that lower rates get sampled only occasionally, if the link is working perfectly.

Set flag that we are currently sampling.

set the rate that we're currently sampling

Set flag that we are currently sampling.

set the rate that we're currently sampling

Continue using the best rate.

Definition at line 1285 of file minstrel-ht-wifi-manager.cc.

Referenced by DoReportAmpduTxStatus(), DoReportDataOk(), DoReportFinalDataFailed(), and RateInit().

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◆ GetFirstMpduTxTime()

Time ns3::MinstrelHtWifiManager::GetFirstMpduTxTime	(	uint8_t	groupId,
		WifiMode	mode ) const

private

Obtain the TxTime saved in the group information.

Parameters

groupId	the group ID
mode	the wifi mode

Returns: the transmit time

Definition at line 440 of file minstrel-ht-wifi-manager.cc.

References m_minstrelGroups, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by CalculateRetransmits(), RateInit(), and StatsDump().

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◆ GetGroupId()

uint8_t ns3::MinstrelHtWifiManager::GetGroupId ( uint16_t index )

private

Return the groupId from the global index.

Parameters

index the index

Returns: the group ID

Definition at line 2105 of file minstrel-ht-wifi-manager.cc.

References m_numRates, and NS_LOG_FUNCTION.

Referenced by CalculateRetransmits(), CountRetries(), DoGetDataTxVector(), DoGetRtsTxVector(), DoReportAmpduTxStatus(), DoReportDataFailed(), DoReportDataOk(), FindRate(), SetBestProbabilityRate(), SetBestStationThRates(), UpdateRate(), and UpdateRateAfterAllowedWidth().

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◆ GetHeDeviceMcsList()

WifiModeList ns3::MinstrelHtWifiManager::GetHeDeviceMcsList ( ) const

private

Returns a list of only the HE MCS supported by the device.

Returns: the list of the HE MCS supported

Definition at line 2233 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiPhy::GetMcsList(), ns3::WifiRemoteStationManager::GetPhy(), and ns3::WIFI_MOD_CLASS_HE.

Referenced by DoInitialize().

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◆ GetHeGroupId()

uint8_t ns3::MinstrelHtWifiManager::GetHeGroupId	(	uint8_t	txstreams,
		Time	guardInterval,
		MHz_u	chWidth )

private

Returns the groupId of an HE MCS with the given number of streams, GI and channel width used.

Parameters

txstreams	the number of streams
guardInterval	guard interval duration
chWidth	the channel width

Returns: the HE group ID

add all VHT groups

Definition at line 2150 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiRemoteStationManager::GetHtSupported(), ns3::Time::GetNanoSeconds(), ns3::WifiRemoteStationManager::GetVhtSupported(), ns3::MAX_HE_SUPPORTED_STREAMS, ns3::MAX_HT_STREAM_GROUPS, ns3::MAX_HT_SUPPORTED_STREAMS, ns3::MAX_VHT_STREAM_GROUPS, ns3::MAX_VHT_SUPPORTED_STREAMS, and NS_LOG_FUNCTION.

Referenced by DoInitialize(), and UpdateRateAfterAllowedWidth().

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◆ GetHtDeviceMcsList()

WifiModeList ns3::MinstrelHtWifiManager::GetHtDeviceMcsList ( ) const

private

Returns a list of only the HT MCS supported by the device.

Returns: the list of the HT MCS supported

Definition at line 2249 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiPhy::GetMcsList(), ns3::WifiRemoteStationManager::GetPhy(), and ns3::WIFI_MOD_CLASS_HT.

Referenced by DoInitialize().

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◆ GetHtGroupId()

uint8_t ns3::MinstrelHtWifiManager::GetHtGroupId	(	uint8_t	txstreams,
		Time	guardInterval,
		MHz_u	chWidth )

private

Returns the groupId of an HT MCS with the given number of streams, GI and channel width used.

Parameters

txstreams	the number of streams
guardInterval	guard interval duration
chWidth	the channel width

Returns: the HT group ID

Definition at line 2112 of file minstrel-ht-wifi-manager.cc.

References ns3::Time::GetNanoSeconds(), ns3::MAX_HT_SUPPORTED_STREAMS, and NS_LOG_FUNCTION.

Referenced by DoInitialize(), and UpdateRateAfterAllowedWidth().

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◆ GetIndex()

uint16_t ns3::MinstrelHtWifiManager::GetIndex	(	uint8_t	groupId,
		uint8_t	rateId )

private

Returns the global index corresponding to the groupId and rateId.

For managing rates from different groups, a global index for all rates in all groups is used. The group order is fixed by BW -> SGI -> streams.

Parameters

groupId	the group ID
rateId	the rate ID

Returns: the index

Definition at line 2087 of file minstrel-ht-wifi-manager.cc.

References m_numRates, and NS_LOG_FUNCTION.

Referenced by GetLowestIndex(), GetLowestIndex(), GetNextSample(), StatsDump(), UpdateRateAfterAllowedWidth(), and UpdateStats().

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◆ GetLowestIndex() [1/2]

uint16_t ns3::MinstrelHtWifiManager::GetLowestIndex ( MinstrelHtWifiRemoteStation * station )

private

Returns the lowest global index of the rates supported by the station.

Parameters

station the Minstrel-HT wifi remote station

Returns: the lowest global index

Definition at line 2198 of file minstrel-ht-wifi-manager.cc.

References GetIndex(), ns3::MinstrelHtWifiRemoteStation::m_groupsTable, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by UpdateStats().

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◆ GetLowestIndex() [2/2]

uint16_t ns3::MinstrelHtWifiManager::GetLowestIndex	(	MinstrelHtWifiRemoteStation *	station,
		uint8_t	groupId )

private

Returns the lowest global index of the rates supported by in the group.

Parameters

station	the Minstrel-HT wifi remote station
groupId	the group ID

Returns: the lowest global index

Definition at line 2218 of file minstrel-ht-wifi-manager.cc.

References GetIndex(), ns3::MinstrelHtWifiRemoteStation::m_groupsTable, NS_ASSERT, and NS_LOG_FUNCTION.

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◆ GetMpduTxTime()

Time ns3::MinstrelHtWifiManager::GetMpduTxTime	(	uint8_t	groupId,
		WifiMode	mode ) const

private

Obtain the TxTime saved in the group information.

Parameters

groupId	the group ID
mode	the wifi mode

Returns: the transmit time

Definition at line 456 of file minstrel-ht-wifi-manager.cc.

References m_minstrelGroups, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by CalculateRetransmits().

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◆ GetNextSample()

uint16_t ns3::MinstrelHtWifiManager::GetNextSample ( MinstrelHtWifiRemoteStation * station )

private

Getting the next sample from Sample Table.

Parameters

station the wifi remote station

Returns: the next sample

Definition at line 1240 of file minstrel-ht-wifi-manager.cc.

References GetIndex(), ns3::MinstrelHtWifiRemoteStation::m_groupsTable, ns3::MinstrelHtWifiRemoteStation::m_sampleGroup, ns3::MinstrelWifiRemoteStation::m_sampleTable, NS_LOG_DEBUG, NS_LOG_FUNCTION, and SetNextSample().

Referenced by FindRate().

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◆ GetRateId()

uint8_t ns3::MinstrelHtWifiManager::GetRateId ( uint16_t index )

private

Return the rateId inside a group, from the global index.

Parameters

index the index

Returns: the rate ID

Definition at line 2096 of file minstrel-ht-wifi-manager.cc.

References m_numRates, and NS_LOG_FUNCTION.

Referenced by CalculateRetransmits(), CountRetries(), DoGetDataTxVector(), DoGetRtsTxVector(), DoReportAmpduTxStatus(), DoReportDataFailed(), DoReportDataOk(), FindRate(), SetBestProbabilityRate(), SetBestStationThRates(), UpdateRate(), and UpdateRateAfterAllowedWidth().

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◆ GetTypeId()

TypeId ns3::MinstrelHtWifiManager::GetTypeId ( )

static

Get the type ID.

Returns: the object TypeId

Definition at line 69 of file minstrel-ht-wifi-manager.cc.

References m_currentRate, m_ewmaLevel, m_frameLength, m_legacyUpdateStats, m_lookAroundRate, m_nSampleCol, m_printStats, m_updateStats, m_useLatestAmendmentOnly, ns3::MakeBooleanAccessor(), ns3::MakeBooleanChecker(), ns3::MakeTimeAccessor(), ns3::MakeTimeChecker(), ns3::MakeTraceSourceAccessor(), ns3::MakeUintegerAccessor(), ns3::MakeUintegerChecker(), ns3::MilliSeconds(), and ns3::TypeId::SetParent().

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◆ GetVhtDeviceMcsList()

WifiModeList ns3::MinstrelHtWifiManager::GetVhtDeviceMcsList ( ) const

private

Returns a list of only the VHT MCS supported by the device.

Returns: the list of the VHT MCS supported

Definition at line 2241 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiPhy::GetMcsList(), ns3::WifiRemoteStationManager::GetPhy(), and ns3::WIFI_MOD_CLASS_VHT.

Referenced by DoInitialize().

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◆ GetVhtGroupId()

uint8_t ns3::MinstrelHtWifiManager::GetVhtGroupId	(	uint8_t	txstreams,
		Time	guardInterval,
		MHz_u	chWidth )

private

Returns the groupId of a VHT MCS with the given number of streams, GI and channel width used.

Parameters

txstreams	the number of streams
guardInterval	guard interval duration
chWidth	the channel width

Returns: the VHT group ID

add all HT groups

Definition at line 2122 of file minstrel-ht-wifi-manager.cc.

References ns3::Time::GetNanoSeconds(), ns3::MAX_HT_STREAM_GROUPS, ns3::MAX_HT_SUPPORTED_STREAMS, ns3::MAX_VHT_SUPPORTED_STREAMS, and NS_LOG_FUNCTION.

Referenced by DoInitialize(), and UpdateRateAfterAllowedWidth().

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◆ InitSampleTable()

void ns3::MinstrelHtWifiManager::InitSampleTable ( MinstrelHtWifiRemoteStation * station )

private

Initialize Sample Table.

Parameters

station the Minstrel-HT wifi remote station

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

Definition at line 1947 of file minstrel-ht-wifi-manager.cc.

References ns3::MinstrelWifiRemoteStation::m_col, ns3::MinstrelWifiRemoteStation::m_index, m_nSampleCol, m_numRates, ns3::MinstrelWifiRemoteStation::m_sampleTable, m_uniformRandomVariable, and NS_LOG_FUNCTION.

Referenced by CheckInit().

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◆ IsValidMcs()

bool ns3::MinstrelHtWifiManager::IsValidMcs	(	Ptr< WifiPhy >	phy,
		uint8_t	streams,
		MHz_u	chWidth,
		WifiMode	mode )

private

Check the validity of a combination of number of streams, chWidth and mode.

Parameters

phy	pointer to the wifi PHY
streams	the number of streams
chWidth	the channel width
mode	the wifi mode

Returns: true if the combination is valid

Definition at line 408 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiTxVector::IsValid(), NS_LOG_FUNCTION, ns3::WifiTxVector::SetChannelWidth(), ns3::WifiTxVector::SetMode(), and ns3::WifiTxVector::SetNss().

Referenced by DoInitialize(), and RateInit().

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◆ PrintSampleTable()

void ns3::MinstrelHtWifiManager::PrintSampleTable ( MinstrelHtWifiRemoteStation * station )

private

Printing Sample Table.

Parameters

station the Minstrel-HT wifi remote station

◆ PrintTable()

void ns3::MinstrelHtWifiManager::PrintTable ( MinstrelHtWifiRemoteStation * station )

private

Printing Minstrel Table.

Parameters

station the Minstrel-HT wifi remote station

Definition at line 1978 of file minstrel-ht-wifi-manager.cc.

References ns3::WifiRemoteStationState::m_address, ns3::MinstrelHtWifiRemoteStation::m_avgAmpduLen, m_numGroups, ns3::MinstrelWifiRemoteStation::m_samplePacketsCount, ns3::WifiRemoteStation::m_state, ns3::MinstrelHtWifiRemoteStation::m_statsFile, ns3::MinstrelWifiRemoteStation::m_totalPacketsCount, Max, and StatsDump().

Referenced by UpdateStats().

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◆ RateInit()

void ns3::MinstrelHtWifiManager::RateInit ( MinstrelHtWifiRemoteStation * station )

private

Initialize Minstrel Table.

Parameters

station the Minstrel-HT wifi remote station

Initialize groups supported by the receiver.

Create the rate list for the group.

Use the McsValue as the index in the rate table. This way, MCSs not supported are not initialized.

If it is a HE MCS only add to a HE group.

Check validity of the HE MCS

If it is a VHT MCS only add to a VHT group.

Check validity of the VHT MCS

If it is a HT MCS only add to a HT group.

Check if the HT MCS corresponds to groups number of streams.

Mapping between rateId and operationalMcsSet

make sure at least one group is supported, otherwise we end up with an infinite loop in SetNextSample

Select the initial sample index.

Calculate the initial high throughput rates.

Select the rate to use.

Definition at line 1699 of file minstrel-ht-wifi-manager.cc.

Referenced by CheckInit().

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◆ SetBestProbabilityRate()

void ns3::MinstrelHtWifiManager::SetBestProbabilityRate	(	MinstrelHtWifiRemoteStation *	station,
		uint16_t	index )

private

Set index rate as maxProbRate if it is better than current value.

Parameters

station	the Minstrel-HT wifi remote station
index	the index

Definition at line 1569 of file minstrel-ht-wifi-manager.cc.

References ns3::MinstrelHtRateInfo::ewmaProb, GetGroupId(), GetRateId(), ns3::MinstrelHtWifiRemoteStation::m_groupsTable, ns3::GroupInfo::m_maxProbRate, ns3::MinstrelWifiRemoteStation::m_maxProbRate, and ns3::GroupInfo::m_ratesTable.

Referenced by UpdateStats().

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◆ SetBestStationThRates()

void ns3::MinstrelHtWifiManager::SetBestStationThRates	(	MinstrelHtWifiRemoteStation *	station,
		uint16_t	index )

private

Set index rate as maxTpRate or maxTp2Rate if is better than current values.

Parameters

station	the Minstrel-HT wifi remote station
index	the index

Definition at line 1634 of file minstrel-ht-wifi-manager.cc.

References GetGroupId(), GetRateId(), ns3::MinstrelHtWifiRemoteStation::m_groupsTable, ns3::GroupInfo::m_maxTpRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate, ns3::GroupInfo::m_maxTpRate2, ns3::MinstrelWifiRemoteStation::m_maxTpRate2, and ns3::GroupInfo::m_ratesTable.

Referenced by UpdateStats().

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◆ SetNextSample()

void ns3::MinstrelHtWifiManager::SetNextSample ( MinstrelHtWifiRemoteStation * station )

private

Set the next sample from Sample Table.

Parameters

station the wifi remote station

Definition at line 1254 of file minstrel-ht-wifi-manager.cc.

References ns3::MinstrelHtWifiRemoteStation::m_groupsTable, m_nSampleCol, m_numGroups, m_numRates, ns3::MinstrelHtWifiRemoteStation::m_sampleGroup, ns3::MinstrelWifiRemoteStation::m_sampleTable, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by GetNextSample(), and RateInit().

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◆ SetupMac()

void ns3::MinstrelHtWifiManager::SetupMac ( const Ptr< WifiMac > mac )

overridevirtual

Set up MAC associated with this device since it is the object that knows the full set of timing parameters (e.g.

IFS).

Parameters

mac	the MAC of this device

Reimplemented from ns3::WifiRemoteStationManager.

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

References m_legacyManager, NS_LOG_FUNCTION, and ns3::WifiRemoteStationManager::SetupMac().

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◆ SetupPhy()

void ns3::MinstrelHtWifiManager::SetupPhy ( const Ptr< WifiPhy > phy )

overridevirtual

Set up PHY associated with this device since it is the object that knows the full set of transmit rates that are supported.

Parameters

phy	the PHY of this device

Reimplemented from ns3::WifiRemoteStationManager.

Definition at line 159 of file minstrel-ht-wifi-manager.cc.

References m_legacyManager, NS_LOG_FUNCTION, and ns3::WifiRemoteStationManager::SetupPhy().

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◆ StatsDump()

void ns3::MinstrelHtWifiManager::StatsDump	(	MinstrelHtWifiRemoteStation *	station,
		uint8_t	groupId,
		std::ofstream &	of )

private

Print group statistics.

Parameters

station	the Minstrel-HT wifi remote station
groupId	the group ID
of	the output file stream

Definition at line 2007 of file minstrel-ht-wifi-manager.cc.

References CalculateThroughput(), ns3::McsGroup::chWidth, GetFirstMpduTxTime(), GetIndex(), ns3::WifiRemoteStationManager::GetMcsSupported(), ns3::Time::GetMicroSeconds(), ns3::McsGroup::gi, ns3::MinstrelHtWifiRemoteStation::m_groupsTable, ns3::MinstrelWifiRemoteStation::m_maxProbRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate2, m_minstrelGroups, m_numRates, ns3::McsGroup::streams, ns3::McsGroup::type, and ns3::WIFI_MINSTREL_GROUP_HT.

Referenced by PrintTable().

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◆ UpdatePacketCounters()

void ns3::MinstrelHtWifiManager::UpdatePacketCounters	(	MinstrelHtWifiRemoteStation *	station,
		uint16_t	nSuccessfulMpdus,
		uint16_t	nFailedMpdus )

private

Update the number of sample count variables.

Parameters

station	the wifi remote station
nSuccessfulMpdus	the number of successfully received MPDUs
nFailedMpdus	the number of failed MPDUs

Definition at line 940 of file minstrel-ht-wifi-manager.cc.

References ns3::MinstrelHtWifiRemoteStation::m_avgAmpduLen, ns3::MinstrelWifiRemoteStation::m_isSampling, ns3::MinstrelHtWifiRemoteStation::m_sampleCount, ns3::MinstrelWifiRemoteStation::m_samplePacketsCount, ns3::MinstrelHtWifiRemoteStation::m_sampleTries, ns3::MinstrelHtWifiRemoteStation::m_sampleWait, ns3::MinstrelWifiRemoteStation::m_totalPacketsCount, and NS_LOG_FUNCTION.

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

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◆ UpdateRate()

void ns3::MinstrelHtWifiManager::UpdateRate ( MinstrelHtWifiRemoteStation * station )

private

Update rate.

Parameters

station the Minstrel-HT wifi remote station

Retry Chain table is implemented here.

FIXME Currently, NS3 does not retransmit an entire A-MPDU when BACK is missing but retransmits each MPDU until MPDUs lifetime expires (or a BACK is received). Then, there is no way to control A-MPDU retries (no call to NeedDataRetransmission). So, it is possible that the A-MPDU keeps retrying after longRetry reaches its limit.

Try | LOOKAROUND RATE | NORMAL RATE

Note: For clarity, multiple blocks of if's and else's are used Following implementation in Linux, in MinstrelHT lowest base rate is not used. Explanation can be found here: http://marc.info/?l=linux-wireless&m=144602778611966&w=2

Get the IDs for all rates.

For normal rate, we're not currently sampling random rates.

Use best throughput rate.

< There are still a few retries.

Use second best throughput rate.

Use best probability rate.

We're currently sampling random rates.

Sample rate is used only once Use the best rate.

Use the best probability rate.

Definition at line 824 of file minstrel-ht-wifi-manager.cc.

References CheckInit(), GetGroupId(), GetRateId(), ns3::MinstrelHtWifiRemoteStation::m_groupsTable, ns3::MinstrelWifiRemoteStation::m_initialized, ns3::MinstrelWifiRemoteStation::m_isSampling, ns3::MinstrelWifiRemoteStation::m_longRetry, ns3::MinstrelWifiRemoteStation::m_maxProbRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate, ns3::MinstrelWifiRemoteStation::m_maxTpRate2, ns3::MinstrelWifiRemoteStation::m_txrate, NS_FATAL_ERROR, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by DoReportAmpduTxStatus(), and DoReportDataFailed().

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◆ UpdateRateAfterAllowedWidth()

uint16_t ns3::MinstrelHtWifiManager::UpdateRateAfterAllowedWidth	(	uint16_t	txRate,
		MHz_u	allowedWidth )

private

Given the index of the current TX rate, check whether the channel width is not greater than the given allowed width.

If so, the index of the current TX rate is returned. Otherwise, try halving the channel width and check if the MCS group with the same number of streams and same GI is supported. If a supported MCS group is found, return the index of the TX rate within such a group with the same MCS as the given TX rate. If no supported MCS group is found, the simulation aborts.

Parameters