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ns3::ErrorRateModel Class Referenceabstract

the interface for Wifi's error models More...

#include "error-rate-model.h"

+ Inheritance diagram for ns3::ErrorRateModel:
+ Collaboration diagram for ns3::ErrorRateModel:

Public Member Functions

virtual int64_t AssignStreams (int64_t stream)
 Assign a fixed random variable stream number to the random variables used by this model.
 
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.
 
virtual bool IsAwgn () 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< ObjectGetObject () 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< ObjectGetObject (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.
 
SimpleRefCountoperator= (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::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

virtual double DoGetChunkSuccessRate (WifiMode mode, const WifiTxVector &txVector, double snr, uint64_t nbits, uint8_t numRxAntennas, WifiPpduField field, uint16_t staId) const =0
 A pure virtual method that must be implemented in the subclass.
 

Additional Inherited Members

- Protected Member Functions inherited from ns3::Object
 Object (const Object &o)
 Copy an Object.
 
virtual void DoDispose ()
 Destructor implementation.
 
virtual void DoInitialize ()
 Initialize() implementation.
 
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.
 

Detailed Description

the interface for Wifi's error models

Introspection did not find any typical Config paths.


No Attributes are defined for this type.
No TraceSources are defined for this type.
Group: Wifi

Size of this type is 56 bytes (on a 64-bit architecture).

Definition at line 24 of file error-rate-model.h.

Member Function Documentation

◆ AssignStreams()

int64_t ns3::ErrorRateModel::AssignStreams ( int64_t stream)
virtual

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
streamfirst stream index to use
Returns
the number of stream indices assigned by this model

Definition at line 93 of file error-rate-model.cc.

◆ CalculateSnr()

double ns3::ErrorRateModel::CalculateSnr ( const WifiTxVector & txVector,
double ber ) const
Parameters
txVectora specific transmission vector including WifiMode
bera target BER
Returns
the SNR which corresponds to the requested BER

Definition at line 28 of file error-rate-model.cc.

References GetChunkSuccessRate(), ns3::WifiTxVector::GetMode(), and NS_ASSERT.

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◆ DoGetChunkSuccessRate()

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

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

Parameters
modethe Wi-Fi mode applicable to this chunk
txVectorTXVECTOR of the overall transmission
snrthe SNR of the chunk
nbitsthe number of bits in this chunk
numRxAntennasthe number of active RX antennas
fieldthe PPDU field to which the chunk belongs to
staIdthe station ID for MU
Returns
probability of successfully receiving the chunk

Implemented in ns3::NistErrorRateModel, ns3::TableBasedErrorRateModel, and ns3::YansErrorRateModel.

Referenced by GetChunkSuccessRate().

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◆ GetChunkSuccessRate()

double ns3::ErrorRateModel::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.

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.

Note that both a WifiMode and a WifiTxVector (which contains a WifiMode) are passed into this method. The WifiTxVector may be from a signal that contains multiple modes (e.g. PHY header sent differently from PHY payload). Consequently, the mode parameter is what the method uses to calculate the chunk error rate, and the txVector is used for other information as needed.

This method handles 802.11b rates by using the DSSS error rate model. For all other rates, the method implemented by the subclass is called.

Parameters
modethe Wi-Fi mode applicable to this chunk
txVectorTXVECTOR of the overall transmission
snrthe SNR of the chunk
nbitsthe number of bits in this chunk
numRxAntennasthe number of active RX antennas (1 if not provided)
fieldthe PPDU field to which the chunk belongs to (assumes this is for the payload part if not provided)
staIdthe station ID for MU
Returns
probability of successfully receiving the chunk

Definition at line 54 of file error-rate-model.cc.

References DoGetChunkSuccessRate(), ns3::WifiMode::GetDataRate(), ns3::DsssErrorRateModel::GetDsssDbpskSuccessRate(), ns3::DsssErrorRateModel::GetDsssDqpskCck11SuccessRate(), ns3::DsssErrorRateModel::GetDsssDqpskCck5_5SuccessRate(), ns3::DsssErrorRateModel::GetDsssDqpskSuccessRate(), ns3::WifiMode::GetModulationClass(), NS_ASSERT, ns3::WIFI_MOD_CLASS_DSSS, and ns3::WIFI_MOD_CLASS_HR_DSSS.

Referenced by CalculateSnr().

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◆ GetTypeId()

TypeId ns3::ErrorRateModel::GetTypeId ( )
static

Get the type ID.

Returns
the object TypeId

Definition at line 21 of file error-rate-model.cc.

References ns3::TypeId::SetParent().

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◆ IsAwgn()

bool ns3::ErrorRateModel::IsAwgn ( ) const
virtual
Returns
true if the model is for AWGN channels, false otherwise

Definition at line 87 of file error-rate-model.cc.


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