A Discrete-Event Network Simulator
API
ns3::dot11s::AirtimeLinkMetricCalculator Class Reference

Airtime link metric calculator. More...

#include "airtime-metric.h"

+ Inheritance diagram for ns3::dot11s::AirtimeLinkMetricCalculator:
+ Collaboration diagram for ns3::dot11s::AirtimeLinkMetricCalculator:

Public Member Functions

 AirtimeLinkMetricCalculator ()
 
uint32_t CalculateMetric (Mac48Address peerAddress, Ptr< MeshWifiInterfaceMac > mac)
 Airtime link metric is defined in Section 13.9 of IEEE 802.11-2012 as: More...
 
- 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
 Get the most derived TypeId for this Object. 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 by TypeId. More...
 
template<>
Ptr< ObjectGetObject () const
 Specialization of () for objects of type ns3::Object. More...
 
template<>
Ptr< ObjectGetObject (TypeId tid) const
 Specialization of (TypeId tid) for objects of type ns3::Object. More...
 
void Initialize (void)
 Invoke DoInitialize on all Objects aggregated to this one. More...
 
bool IsInitialized (void) 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)
 Copy constructor. More...
 
uint32_t GetReferenceCount (void) const
 Get the reference count of the object. More...
 
SimpleRefCountoperator= (const SimpleRefCount &o)
 Assignment operator. 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 ()
 Get the type ID. More...
 
- Static Public Member Functions inherited from ns3::Object
static TypeId GetTypeId (void)
 Register this type. More...
 
- Static Public Member Functions inherited from ns3::ObjectBase
static TypeId GetTypeId (void)
 Get the type ID. More...
 

Private Member Functions

void SetHeaderTid (uint8_t tid)
 Set header TID from the Dot11MetricTid attribute. More...
 
void SetTestLength (uint16_t testLength)
 Set number of bytes in test frame (a constant 1024 in the standard) More...
 

Private Attributes

Ptr< Packetm_testFrame
 test frame More...
 
WifiMacHeader m_testHeader
 test header 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...
 

Detailed Description

Airtime link metric calculator.


Introspection did not find any typical Config paths.

Airtime link metric is defined in 11B.10 of 802.11s Draft D3.0 as:

airtime = (O + Bt/r)* (1 + average retry counter), where:

  • o – the PHY dependent channel access which includes frame headers, training sequences, access protocol frames, etc.
  • bt – the test packet length in bits (8192 by default),
  • r – the current bitrate of the packet,

Final result is expressed in units of 0.01 Time Unit = 10.24 us (as required by 802.11s draft)


Attributes

  • TestLength: Number of bytes in test frame (a constant 1024 in the standard)
    • Set with class: ns3::UintegerValue
    • Underlying type: uint16_t 1:65535
    • Initial value: 1024
    • Flags: construct write
  • Dot11MetricTid: TID used to calculate metric (data rate)
    • Set with class: ns3::UintegerValue
    • Underlying type: uint8_t 0:255
    • Initial value: 0
    • Flags: construct write

No TraceSources are defined for this type.
Size of this type is 96 bytes (on a 64-bit architecture).

Definition at line 41 of file airtime-metric.h.

Constructor & Destructor Documentation

◆ AirtimeLinkMetricCalculator()

ns3::dot11s::AirtimeLinkMetricCalculator::AirtimeLinkMetricCalculator ( )

Definition at line 52 of file airtime-metric.cc.

Member Function Documentation

◆ CalculateMetric()

uint32_t ns3::dot11s::AirtimeLinkMetricCalculator::CalculateMetric ( Mac48Address  peerAddress,
Ptr< MeshWifiInterfaceMac mac 
)

Airtime link metric is defined in Section 13.9 of IEEE 802.11-2012 as:

airtime = (O + Bt/r) / (1 - frame error rate), where o – the PHY dependent channel access which includes frame headers, training sequences, access protocol frames, etc. bt – the test packet length in bits (8192 by default), r – the current bitrate of the packet,

Final result is expressed encoded as an unsigned integer in units of 0.01 TU = 10.24 us

Parameters
peerAddressThe peer MAC address
macThe MAC layer
Returns
the calculated metric in units of 0.01 TU

Definition at line 69 of file airtime-metric.cc.

References ns3::Packet::GetSize(), ns3::Mac48Address::IsGroup(), m_testFrame, m_testHeader, third::mac, NS_ASSERT, ns3::WifiTxVector::SetMode(), ns3::WifiTxVector::SetPreambleType(), and ns3::WIFI_PREAMBLE_LONG.

Referenced by ns3::dot11s::HwmpProtocol::Install().

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◆ GetTypeId()

TypeId ns3::dot11s::AirtimeLinkMetricCalculator::GetTypeId ( void  )
static

Get the type ID.

Returns
the object TypeId

Definition at line 29 of file airtime-metric.cc.

References ns3::MakeUintegerAccessor(), SetHeaderTid(), ns3::TypeId::SetParent(), and SetTestLength().

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◆ SetHeaderTid()

void ns3::dot11s::AirtimeLinkMetricCalculator::SetHeaderTid ( uint8_t  tid)
private

Set header TID from the Dot11MetricTid attribute.

Parameters
tidthe header TID to use to calculate data rate

Definition at line 56 of file airtime-metric.cc.

References m_testHeader, ns3::WifiMacHeader::SetDsFrom(), ns3::WifiMacHeader::SetDsTo(), ns3::WifiMacHeader::SetQosTid(), ns3::WifiMacHeader::SetType(), and ns3::WIFI_MAC_DATA.

Referenced by GetTypeId().

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◆ SetTestLength()

void ns3::dot11s::AirtimeLinkMetricCalculator::SetTestLength ( uint16_t  testLength)
private

Set number of bytes in test frame (a constant 1024 in the standard)

Parameters
testLengththe test length in bits

Definition at line 64 of file airtime-metric.cc.

References m_testFrame.

Referenced by GetTypeId().

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Member Data Documentation

◆ m_testFrame

Ptr<Packet> ns3::dot11s::AirtimeLinkMetricCalculator::m_testFrame
private

test frame

Definition at line 79 of file airtime-metric.h.

Referenced by CalculateMetric(), and SetTestLength().

◆ m_testHeader

WifiMacHeader ns3::dot11s::AirtimeLinkMetricCalculator::m_testHeader
private

test header

Definition at line 80 of file airtime-metric.h.

Referenced by CalculateMetric(), and SetHeaderTid().


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