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 ()

virtual double	GetChunkSuccessRate (WifiMode mode, double snr, uint32_t nbits) const
	A pure virtual method that must be implemented in the subclass. More...

Public Member Functions inherited from ns3::ErrorRateModel
double	CalculateSnr (WifiMode txMode, double ber) const

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

virtual	~Object ()
	Destructor. More...

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

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

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

virtual TypeId	GetInstanceTypeId (void) const
	Implement the GetInstanceTypeId method defined in ObjectBase. More...

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

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

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

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

	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor. More...

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

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

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

void	Unref (void) 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 erros. 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 (void)

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

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

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

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

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

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

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

double	GetFecQamBer (double snr, uint32_t nbits, uint32_t signalSpread, uint32_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, uint32_t phyRate) const
	Return BER of QAM-m with the given parameters. More...

double	Log2 (double val) const
	Return the logarithm of the given value to base 2. More...

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

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

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

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

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

Detailed Description

Model the error rate for different modulations.

Introspection did not find any typical Config paths.

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 Digitial 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 complementarycode-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

No Attributes are defined for this type.
No TraceSources are defined for this type.
Size of this type is 32 bytes (on a 64-bit architecture).

Definition at line 55 of file yans-error-rate-model.h.

Constructor & Destructor Documentation

ns3::YansErrorRateModel::YansErrorRateModel ( )

Definition at line 45 of file yans-error-rate-model.cc.

Member Function Documentation

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 86 of file yans-error-rate-model.cc.

References Factorial().

Referenced by CalculatePdEven(), and CalculatePdOdd().

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

private

Parameters

ber
d

Returns: double

Definition at line 123 of file yans-error-rate-model.cc.

References CalculatePdEven(), and CalculatePdOdd().

Referenced by GetFecBpskBer(), and GetFecQamBer().

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

private

Parameters

ber
d

Returns: double

Definition at line 106 of file yans-error-rate-model.cc.

References Binomial(), and NS_ASSERT.

Referenced by CalculatePd().

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

private

Parameters

ber
d

Returns: double

Definition at line 92 of file yans-error-rate-model.cc.

References Binomial(), and NS_ASSERT.

Referenced by CalculatePd().

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

private

Return k!

Parameters

k

Returns: k!

Definition at line 75 of file yans-error-rate-model.cc.

Referenced by Binomial().

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

private

Return BER of BPSK with the given parameters.

Parameters

snr	snr value
signalSpread
phyRate

Returns: BER of BPSK at the given SNR

Definition at line 55 of file yans-error-rate-model.cc.

References NS_LOG_INFO.

Referenced by GetFecBpskBer().

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double ns3::YansErrorRateModel::GetChunkSuccessRate	(	WifiMode	mode,
		double	snr,
		uint32_t	nbits
	)		const

virtual

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

This method returns the probability that the given 'chunk' of the packet will be successfully received by the PHY.

A chunk can be viewed as a part of a packet with equal SNR. The probability of successfully receiving the chunk depends on the mode, the SNR, and the size of the chunk.

Parameters

mode	the Wi-Fi mode the chunk is sent
snr	the SNR of the chunk
nbits	the number of bits in this chunk

Returns: probability of successfully receiving the chunk

Implements ns3::ErrorRateModel.

Definition at line 178 of file yans-error-rate-model.cc.

References ns3::WifiMode::GetBandwidth(), ns3::WifiMode::GetCodeRate(), ns3::WifiMode::GetConstellationSize(), ns3::WifiMode::GetDataRate(), ns3::DsssErrorRateModel::GetDsssDbpskSuccessRate(), ns3::DsssErrorRateModel::GetDsssDqpskCck11SuccessRate(), ns3::DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate(), ns3::DsssErrorRateModel::GetDsssDqpskSuccessRate(), GetFecBpskBer(), GetFecQamBer(), ns3::WifiMode::GetModulationClass(), ns3::WifiMode::GetPhyRate(), ns3::WIFI_CODE_RATE_1_2, ns3::WIFI_CODE_RATE_2_3, ns3::WIFI_CODE_RATE_5_6, ns3::WIFI_MOD_CLASS_DSSS, ns3::WIFI_MOD_CLASS_ERP_OFDM, ns3::WIFI_MOD_CLASS_HT, and ns3::WIFI_MOD_CLASS_OFDM.

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

private

Parameters

snr
nbits
signalSpread
phyRate
dFree
adFree

Returns: double

Definition at line 138 of file yans-error-rate-model.cc.

References CalculatePd(), and GetBpskBer().

Referenced by GetChunkSuccessRate().

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