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)
void	SetHeaderTid (uint8_t tid)
void	SetTestLength (uint16_t testLength)
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 ()
	This method returns the TypeId associated to ns3::dot11s::AirtimeLinkMetricCalculator.

Private Attributes
uint16_t	m_headerLength
	header length (used in overhead)
uint16_t	m_meshHeaderLength
	meshHeader length (minimum 6 octets)
uint32_t	m_overheadNanosec
	Overhead expressed in nanoseconds:DIFS + SIFS + 2 * PREAMBLE + ACK.
Ptr< Packet >	m_testFrame
WifiMacHeader	m_testHeader
uint32_t	m_testLength
	Bt value.

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

Airtime link metric calculator.

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)

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

Constructor & Destructor Documentation

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

Definition at line 57 of file airtime-metric.cc.

Member Function Documentation

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

Definition at line 75 of file airtime-metric.cc.

References ns3::WifiPhy::CalculateTxDuration(), ns3::WifiRemoteStationManager::GetDataMode(), ns3::RegularWifiMac::GetEifsNoDifs(), ns3::WifiRemoteStationInfo::GetFrameErrorRate(), ns3::WifiRemoteStationManager::GetInfo(), ns3::RegularWifiMac::GetPifs(), ns3::Packet::GetSize(), ns3::RegularWifiMac::GetSlot(), ns3::RegularWifiMac::GetWifiPhy(), ns3::RegularWifiMac::GetWifiRemoteStationManager(), ns3::Mac48Address::IsGroup(), m_testFrame, m_testHeader, NS_ASSERT, and ns3::WIFI_PREAMBLE_LONG.

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

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

static

This method returns the TypeId associated to ns3::dot11s::AirtimeLinkMetricCalculator.

Attributes defined for this type:

TestLength: Rate should be estimated using test length.
- 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
Dot11sMeshHeaderLength: Length of the mesh header
- Set with class: ns3::UintegerValue
- Underlying type: uint16_t 0:65535
- Initial value: 6
- Flags: construct write read