Model the error rate for different modulations. More...

#include "yans-error-rate-model.h"

Inheritance diagram for ns3::YansErrorRateModel:

Collaboration diagram for ns3::YansErrorRateModel:

Public Member Functions
	YansErrorRateModel ()

Public Member Functions inherited from ns3::ErrorRateModel
virtual int64_t	AssignStreams (int64_t stream)
	Assign a fixed random variable stream number to the random variables used by this model. More...

double	CalculateSnr (const WifiTxVector &txVector, double ber) const

double	GetChunkSuccessRate (WifiMode mode, const WifiTxVector &txVector, double snr, uint64_t nbits, uint8_t numRxAntennas=1, WifiPpduField field=WIFI_PPDU_FIELD_DATA, uint16_t staId=SU_STA_ID) const
	This method returns the probability that the given 'chunk' of the packet will be successfully received by the PHY. More...

virtual bool	IsAwgn () const

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

	~Object () override
	Destructor. More...

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

void	Dispose ()
	Dispose of this Object. More...

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

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

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

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

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

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

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

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

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

	SimpleRefCount (const SimpleRefCount &o[[maybe_unused]])
	Copy constructor. More...

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

SimpleRefCount &	operator= (const SimpleRefCount &o[[maybe_unused]])
	Assignment operator. More...

void	Ref () const
	Increment the reference count. More...

void	Unref () const
	Decrement the reference count. More...

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

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

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

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

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

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

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

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

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

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

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

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

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

Private Member Functions
double	Binomial (uint32_t k, double p, uint32_t n) const
	Return Binomial distribution for a given k, p, and n. More...

double	CalculatePd (double ber, unsigned int d) const

double	CalculatePdEven (double ber, unsigned int d) const

double	CalculatePdOdd (double ber, unsigned int d) const

double	DoGetChunkSuccessRate (WifiMode mode, const WifiTxVector &txVector, double snr, uint64_t nbits, uint8_t numRxAntennas, WifiPpduField field, uint16_t staId) const override
	A pure virtual method that must be implemented in the subclass. More...

uint32_t	Factorial (uint32_t k) const
	Return k! More...

double	GetBpskBer (double snr, uint32_t signalSpread, uint64_t phyRate) const
	Return BER of BPSK with the given parameters. More...

double	GetFecBpskBer (double snr, uint64_t nbits, uint32_t signalSpread, uint64_t phyRate, uint32_t dFree, uint32_t adFree) const

double	GetFecQamBer (double snr, uint64_t nbits, uint32_t signalSpread, uint64_t phyRate, uint32_t m, uint32_t dfree, uint32_t adFree, uint32_t adFreePlusOne) const

double	GetQamBer (double snr, unsigned int m, uint32_t signalSpread, uint64_t phyRate) const
	Return BER of QAM-m with the given parameters. More...

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

virtual void	DoDispose ()
	Destructor implementation. More...

virtual void	DoInitialize ()
	Initialize() implementation. More...

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

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

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

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

Detailed Description

Model the error rate for different modulations.

A packet of interest (e.g., a packet can potentially be received by the MAC) is divided into chunks. Each chunk is related to an start/end receiving event. For each chunk, it calculates the ratio (SINR) between received power of packet of interest and summation of noise and interfering power of all the other incoming packets. Then, it will calculate the success rate of the chunk based on BER of the modulation. The success reception rate of the packet is derived from the success rate of all chunks.

The 802.11b modulations:

1 Mbps mode is based on DBPSK. BER is from equation 5.2-69 from John G. Proakis Digital Communications, 2001 edition
2 Mbps model is based on DQPSK. Equation 8 from "Tight bounds and accurate approximations for DQPSK transmission bit error rate", G. Ferrari and G.E. Corazza ELECTRONICS LETTERS, 40(20):1284-1285, September 2004
5.5 Mbps and 11 Mbps are based on equations (18) and (17) from "Properties and performance of the IEEE 802.11b complementary code-key signal sets", Michael B. Pursley and Thomas C. Royster. IEEE TRANSACTIONS ON COMMUNICATIONS, 57(2):440-449, February 2009.
More detailed description and validation can be found in http://www.nsnam.org/~pei/80211b.pdf

Definition at line 53 of file yans-error-rate-model.h.

Constructor & Destructor Documentation

◆ YansErrorRateModel()

ns3::YansErrorRateModel::YansErrorRateModel ( )

Definition at line 47 of file yans-error-rate-model.cc.

Member Function Documentation

◆ Binomial()

double ns3::YansErrorRateModel::Binomial	(	uint32_t	k,
		double	p,
		uint32_t	n
	)		const

private

Return Binomial distribution for a given k, p, and n.

Parameters

k
p
n

Returns: a Binomial distribution

Definition at line 91 of file yans-error-rate-model.cc.

References Factorial(), and two-ray-to-three-gpp-ch-calibration::k.

Referenced by CalculatePdEven(), and CalculatePdOdd().

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◆ CalculatePd()

double ns3::YansErrorRateModel::CalculatePd	(	double	ber,
		unsigned int	d
	)		const

private

Parameters

ber
d

Returns: double

Definition at line 132 of file yans-error-rate-model.cc.

References CalculatePdEven(), CalculatePdOdd(), and NS_LOG_FUNCTION.

Referenced by GetFecBpskBer(), and GetFecQamBer().

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◆ CalculatePdEven()

double ns3::YansErrorRateModel::CalculatePdEven	(	double	ber,
		unsigned int	d
	)		const

private

Parameters

ber
d

Returns: double

Definition at line 115 of file yans-error-rate-model.cc.

References Binomial(), and NS_ASSERT.

Referenced by CalculatePd().

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◆ CalculatePdOdd()

double ns3::YansErrorRateModel::CalculatePdOdd	(	double	ber,
		unsigned int	d
	)		const

private

Parameters

ber
d

Returns: double

Definition at line 100 of file yans-error-rate-model.cc.

References Binomial(), and NS_ASSERT.

Referenced by CalculatePd().

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◆ DoGetChunkSuccessRate()

double ns3::YansErrorRateModel::DoGetChunkSuccessRate	(	WifiMode	mode,
		const WifiTxVector &	txVector,
		double	snr,
		uint64_t	nbits,
		uint8_t	numRxAntennas,
		WifiPpduField	field,
		uint16_t	staId
	)		const

overrideprivatevirtual

A pure virtual method that must be implemented in the subclass.

Parameters

mode	the Wi-Fi mode applicable to this chunk
txVector	TXVECTOR of the overall transmission
snr	the SNR of the chunk
nbits	the number of bits in this chunk
numRxAntennas	the number of active RX antennas
field	the PPDU field to which the chunk belongs to
staId	the station ID for MU

Returns: probability of successfully receiving the chunk

Implements ns3::ErrorRateModel.

Definition at line 197 of file yans-error-rate-model.cc.

References ns3::WifiTxVector::GetChannelWidth(), ns3::WifiMode::GetCodeRate(), ns3::WifiMode::GetConstellationSize(), GetFecBpskBer(), GetFecQamBer(), ns3::WifiTxVector::GetMode(), ns3::WifiMode::GetModulationClass(), ns3::WifiMode::GetPhyRate(), ns3::WifiTxVector::IsMu(), NS_LOG_FUNCTION, ns3::SU_STA_ID, ns3::WIFI_CODE_RATE_1_2, ns3::WIFI_CODE_RATE_2_3, ns3::WIFI_CODE_RATE_5_6, and ns3::WIFI_MOD_CLASS_ERP_OFDM.

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◆ Factorial()

uint32_t ns3::YansErrorRateModel::Factorial ( uint32_t k ) const

private

Return k!

Parameters

k

Returns: k!

Definition at line 79 of file yans-error-rate-model.cc.

References two-ray-to-three-gpp-ch-calibration::k.

Referenced by Binomial().

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◆ GetBpskBer()

double ns3::YansErrorRateModel::GetBpskBer	(	double	snr,
		uint32_t	signalSpread,
		uint64_t	phyRate
	)		const

private

Return BER of BPSK with the given parameters.

Parameters

snr	SNR ratio (not dB)
signalSpread
phyRate

Returns: BER of BPSK at the given SNR

Definition at line 52 of file yans-error-rate-model.cc.

References NS_LOG_FUNCTION, and NS_LOG_INFO.

Referenced by GetFecBpskBer().

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◆ GetFecBpskBer()

double ns3::YansErrorRateModel::GetFecBpskBer	(	double	snr,
		uint64_t	nbits,
		uint32_t	signalSpread,
		uint64_t	phyRate,
		uint32_t	dFree,
		uint32_t	adFree
	)		const

private

Parameters

snr	SNR ratio (not dB)
nbits
signalSpread
phyRate
dFree
adFree

Returns: double

Definition at line 148 of file yans-error-rate-model.cc.

References CalculatePd(), GetBpskBer(), min, and NS_LOG_FUNCTION.

Referenced by DoGetChunkSuccessRate().

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◆ GetFecQamBer()

double ns3::YansErrorRateModel::GetFecQamBer	(	double	snr,
		uint64_t	nbits,
		uint32_t	signalSpread,
		uint64_t	phyRate,
		uint32_t	m,
		uint32_t	dfree,
		uint32_t	adFree,
		uint32_t	adFreePlusOne
	)		const