Ideal rate control algorithmThis class implements an 'ideal' rate control algorithm similar to RBAR in spirit (see A rate-adaptive MAC protocol for multihop wireless networks by G. Holland, N. Vaidya, and P. Bahl.): every station keeps track of the snr of every packet received and sends back this snr to the original transmitter by an out-of-band mechanism. Each transmitter keeps track of the last snr sent back by a receiver and uses it to pick a transmission mode based on a set of snr thresholds built from a target ber and transmission mode-specific snr/ber curves. More...

#include <ideal-wifi-manager.h>

Inheritance diagram for ns3::IdealWifiManager:

Collaboration diagram for ns3::IdealWifiManager:

Public Member Functions
	IdealWifiManager ()

virtual	~IdealWifiManager ()

virtual void	SetupPhy (Ptr< WifiPhy > phy)

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

virtual	~WifiRemoteStationManager ()

void	AddBasicMcs (uint8_t mcs)

void	AddBasicMode (WifiMode mode)

void	AddStationHtCapabilities (Mac48Address from, HtCapabilities htcapabilities)

void	AddSupportedMcs (Mac48Address address, uint8_t mcs)

void	AddSupportedMode (Mac48Address address, WifiMode mode)

WifiTxVector	DoGetCtsToSelfTxVector (void)

WifiTxVector	GetAckTxVector (Mac48Address address, WifiMode dataMode)

uint8_t	GetBasicMcs (uint32_t i) const

WifiMode	GetBasicMode (uint32_t i) const

WifiTxVector	GetBlockAckTxVector (Mac48Address address, WifiMode dataMode)

WifiTxVector	GetCtsToSelfTxVector (const WifiMacHeader *header, Ptr< const Packet > packet)

WifiTxVector	GetCtsTxVector (Mac48Address address, WifiMode rtsMode)

WifiTxVector	GetDataTxVector (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fullPacketSize)

uint8_t	GetDefaultMcs (void) const

WifiMode	GetDefaultMode (void) const

uint8_t	GetDefaultTxPowerLevel (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)

bool	GetGreenfieldSupported (Mac48Address address) const

WifiRemoteStationInfo	GetInfo (Mac48Address address)

uint32_t	GetMaxSlrc (void) const

uint32_t	GetMaxSsrc (void) const

uint32_t	GetNBasicMcs (void) const

uint32_t	GetNBasicModes (void) const

WifiMode	GetNonUnicastMode (void) const

uint32_t	GetNumberOfTransmitAntennas (void)

uint32_t	GetRtsCtsThreshold (void) const

WifiTxVector	GetRtsTxVector (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)

bool	HasHtSupported (void) const

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	NeedCtsToSelf (WifiTxVector txVector)

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	SetDefaultTxPowerLevel (uint8_t txPower)

void	SetFragmentationThreshold (uint32_t threshold)

void	SetHtSupported (bool enable)

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	Initialize (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)

Static Public Member Functions inherited from ns3::WifiRemoteStationManager
static TypeId	GetTypeId (void)

Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId (void)

Static Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
static void	Cleanup (void)

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId (void)

Private Types
typedef std::vector< std::pair < double, WifiMode > >	Thresholds

Private Member Functions
void	AddModeSnrThreshold (WifiMode mode, double ber)

virtual WifiRemoteStation *	DoCreateStation (void) const

virtual WifiTxVector	DoGetDataTxVector (WifiRemoteStation *station, uint32_t size)

virtual WifiTxVector	DoGetRtsTxVector (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)

double	GetSnrThreshold (WifiMode mode) const

virtual bool	IsLowLatency (void) const

Private Attributes
double	m_ber

Thresholds	m_thresholds

Additional Inherited Members
Protected Member Functions inherited from ns3::WifiRemoteStationManager
virtual void	DoDispose (void)

bool	GetGreenfield (const WifiRemoteStation *station) const

uint32_t	GetLongRetryCount (const WifiRemoteStation *station) const

uint8_t	GetMcsSupported (const WifiRemoteStation *station, uint32_t i) const

uint32_t	GetNMcsSupported (const WifiRemoteStation *station) const

uint32_t	GetNSupported (const WifiRemoteStation *station) const

uint32_t	GetNumberOfReceiveAntennas (const WifiRemoteStation *station) const

uint32_t	GetNumberOfTransmitAntennas (const WifiRemoteStation *station) const

bool	GetShortGuardInterval (const WifiRemoteStation *station) const

uint32_t	GetShortRetryCount (const WifiRemoteStation *station) const

bool	GetStbc (const WifiRemoteStation *station) const

WifiMode	GetSupported (const WifiRemoteStation *station, uint32_t i) const

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

virtual void	DoInitialize (void)

virtual void	NotifyNewAggregate (void)

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)

virtual void	NotifyConstructionCompleted (void)

Detailed Description

Ideal rate control algorithm

This class implements an 'ideal' rate control algorithm similar to RBAR in spirit (see A rate-adaptive MAC protocol for multihop wireless networks by G. Holland, N. Vaidya, and P. Bahl.): every station keeps track of the snr of every packet received and sends back this snr to the original transmitter by an out-of-band mechanism. Each transmitter keeps track of the last snr sent back by a receiver and uses it to pick a transmission mode based on a set of snr thresholds built from a target ber and transmission mode-specific snr/ber curves.

Config Paths

ns3::IdealWifiManager is accessible through the following paths with Config::Set and Config::Connect:

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

Attributes

BerThreshold: The maximum Bit Error Rate acceptable at any transmission mode
- Set with class: ns3::DoubleValue
- Underlying type: double -1.79769e+308:1.79769e+308
- Initial value: 1e-05
- 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
DefaultTxPowerLevel: Default power level to be used for transmissions. This is the power level that is used by all those WifiManagers that do notimplement TX power control.
- Set with class: ns3::UintegerValue
- Underlying type: uint8_t 0:255
- Initial value: 0
- Flags: construct write read

No TraceSources are 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

Definition at line 45 of file ideal-wifi-manager.h.

Member Typedef Documentation

typedef std::vector<std::pair<double,WifiMode> > ns3::IdealWifiManager::Thresholds

private

Definition at line 76 of file ideal-wifi-manager.h.

Constructor & Destructor Documentation

ns3::IdealWifiManager::IdealWifiManager ( )

Definition at line 52 of file ideal-wifi-manager.cc.

ns3::IdealWifiManager::~IdealWifiManager ( )

virtual

Definition at line 55 of file ideal-wifi-manager.cc.

Member Function Documentation

void ns3::IdealWifiManager::AddModeSnrThreshold	(	WifiMode	mode,
		double	ber
	)

private

Definition at line 87 of file ideal-wifi-manager.cc.

References m_thresholds.

Referenced by SetupPhy().

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

privatevirtual

Returns: a new station data structure

Implements ns3::WifiRemoteStationManager.

Definition at line 93 of file ideal-wifi-manager.cc.

References ns3::IdealWifiRemoteStation::m_lastSnr.

WifiTxVector ns3::IdealWifiManager::DoGetDataTxVector	(	WifiRemoteStation *	station,
		uint32_t	size
	)

privatevirtual

Parameters

station	the station with which we need to communicate
size	size of the packet or fragment we want to send

Returns: the transmission mode 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 138 of file ideal-wifi-manager.cc.

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

privatevirtual

Parameters

station the station with which 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 160 of file ideal-wifi-manager.cc.

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

privatevirtual

Implements ns3::WifiRemoteStationManager.

Definition at line 111 of file ideal-wifi-manager.cc.

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

privatevirtual

Implements ns3::WifiRemoteStationManager.

Definition at line 122 of file ideal-wifi-manager.cc.

References ns3::IdealWifiRemoteStation::m_lastSnr.

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

privatevirtual

Implements ns3::WifiRemoteStationManager.

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

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

privatevirtual

Implements ns3::WifiRemoteStationManager.

Definition at line 129 of file ideal-wifi-manager.cc.

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

privatevirtual

Implements ns3::WifiRemoteStationManager.

Definition at line 107 of file ideal-wifi-manager.cc.

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

privatevirtual

Implements ns3::WifiRemoteStationManager.

Definition at line 115 of file ideal-wifi-manager.cc.

References ns3::IdealWifiRemoteStation::m_lastSnr.

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

privatevirtual

Implements ns3::WifiRemoteStationManager.

Definition at line 102 of file ideal-wifi-manager.cc.

double ns3::IdealWifiManager::GetSnrThreshold ( WifiMode mode ) const

private

Definition at line 73 of file ideal-wifi-manager.cc.

References m_thresholds, and NS_ASSERT.

Referenced by DoGetDataTxVector(), and DoGetRtsTxVector().

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TypeId ns3::IdealWifiManager::GetTypeId ( void )

static

Definition at line 38 of file ideal-wifi-manager.cc.

References m_ber, and ns3::TypeId::SetParent().

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

privatevirtual

Returns: whether this manager is a manager designed to work in low-latency environments.

Note: In this context, low vs high latency is defined in IEEE 802.11 Rate Adaptation: A Practical Approach, by M. Lacage, M.H. Manshaei, and T. Turletti.

Implements ns3::WifiRemoteStationManager.

Definition at line 183 of file ideal-wifi-manager.cc.

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

virtual

Reimplemented from ns3::WifiRemoteStationManager.

Definition at line 60 of file ideal-wifi-manager.cc.

References AddModeSnrThreshold(), ns3::WifiPhy::CalculateSnr(), ns3::WifiPhy::GetMode(), ns3::WifiPhy::GetNModes(), m_ber, and ns3::WifiRemoteStationManager::SetupPhy().

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