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ns3::YansErrorRateModel Class Reference
Wifi Models

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. More...

#include <yans-error-rate-model.h>

+ Inheritance diagram for ns3::YansErrorRateModel:
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Public Member Functions

 YansErrorRateModel ()
virtual double GetChunkSuccessRate (WifiMode mode, double snr, uint32_t nbits) const
- Public Member Functions inherited from ns3::ErrorRateModel
double CalculateSnr (WifiMode txMode, double ber) const
- Public Member Functions inherited from ns3::Object
 Object ()
virtual ~Object ()
void AggregateObject (Ptr< Object > other)
void Dispose (void)
AggregateIterator GetAggregateIterator (void) const
virtual TypeId GetInstanceTypeId (void) const
template<typename T >
Ptr< T > GetObject (void) const
template<typename T >
Ptr< T > GetObject (TypeId tid) const
void Start (void)
- Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
 SimpleRefCount ()
 SimpleRefCount (const SimpleRefCount &o)
uint32_t GetReferenceCount (void) const
SimpleRefCount & operator= (const SimpleRefCount &o)
void Ref (void) const
void Unref (void) const
- Public Member Functions inherited from ns3::ObjectBase
virtual ~ObjectBase ()
void GetAttribute (std::string name, AttributeValue &value) const
bool GetAttributeFailSafe (std::string name, AttributeValue &attribute) const
void SetAttribute (std::string name, const AttributeValue &value)
bool SetAttributeFailSafe (std::string name, const AttributeValue &value)
bool TraceConnect (std::string name, std::string context, const CallbackBase &cb)
bool TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
bool TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
bool TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)

Static Public Member Functions

static TypeId GetTypeId (void)
 This method returns the TypeId associated to ns3::YansErrorRateModel.

Private Member Functions

double Binomial (uint32_t k, double p, uint32_t n) const
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
double GetBpskBer (double snr, uint32_t signalSpread, uint32_t phyRate) const
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
double Log2 (double val) const

Additional Inherited Members

- Protected Member Functions inherited from ns3::Object
 Object (const Object &o)
virtual void DoDispose (void)
virtual void DoStart (void)
virtual void NotifyNewAggregate (void)

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 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

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

Constructor & Destructor Documentation

ns3::YansErrorRateModel::YansErrorRateModel ( )

Definition at line 40 of file yans-error-rate-model.cc.

Member Function Documentation

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

Definition at line 81 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

Definition at line 118 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

Definition at line 101 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

Definition at line 87 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

Definition at line 70 of file yans-error-rate-model.cc.

References anonymous_namespace{rng-stream.cc}::fact.

Referenced by Binomial().

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

Definition at line 50 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

Implements ns3::ErrorRateModel.

Definition at line 173 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_MOD_CLASS_DSSS, ns3::WIFI_MOD_CLASS_ERP_OFDM, 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

Definition at line 133 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
private

Definition at line 150 of file yans-error-rate-model.cc.

References CalculatePd(), and GetQamBer().

Referenced by GetChunkSuccessRate().

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double ns3::YansErrorRateModel::GetQamBer ( double  snr,
unsigned int  m,
uint32_t  signalSpread,
uint32_t  phyRate 
) const
private

Definition at line 59 of file yans-error-rate-model.cc.

References Log2(), and NS_LOG_INFO.

Referenced by GetFecQamBer().

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TypeId ns3::YansErrorRateModel::GetTypeId ( void  )
static

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

No Attributes defined for this type.
No TraceSources defined for this type.

Reimplemented from ns3::ErrorRateModel.

Definition at line 31 of file yans-error-rate-model.cc.

References ns3::TypeId::SetParent().

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double ns3::YansErrorRateModel::Log2 ( double  val) const
private

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

Referenced by GetQamBer().

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