This class manage the bandwidth request and grant mechanism. The bandwidth request and grant mechanism is supported by the Bandwidth Manager. Both BS and SS maintain a bandwidth manager. Furthermore BS's bandwidth manager works together with the uplink scheduler to determine total bandwidth available and allocation size for each service flow. Bandwidth request mechanism is a key feature of the WiMAX scheduler since all three non-UGS services explicitly request for bandwidth by sending a bandwidth request to BS. More...

#include <bandwidth-manager.h>

Inheritance diagram for ns3::BandwidthManager:

Collaboration diagram for ns3::BandwidthManager:

Public Member Functions
	BandwidthManager (Ptr< WimaxNetDevice > device)
	~BandwidthManager (void)
uint32_t	CalculateAllocationSize (const SSRecord ssRecord, const ServiceFlow serviceFlow)
void	DoDispose (void)
uint32_t	GetSymbolsPerFrameAllocated (void)
void	ProcessBandwidthRequest (const BandwidthRequestHeader &bwRequestHdr)
ServiceFlow *	SelectFlowForRequest (uint32_t &bytesToRequest)
void	SendBandwidthRequest (uint8_t uiuc, uint16_t allocationSize)
void	SetSubframeRatio (void)
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::BandwidthManager.

Private Member Functions
	BandwidthManager (const BandwidthManager &)
BandwidthManager &	operator= (const BandwidthManager &)

Private Attributes
Ptr< WimaxNetDevice >	m_device
uint16_t	m_nrBwReqsSent

Additional Inherited Members
Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
virtual void	DoStart (void)
virtual void	NotifyNewAggregate (void)

Detailed Description

This class manage the bandwidth request and grant mechanism. The bandwidth request and grant mechanism is supported by the Bandwidth Manager. Both BS and SS maintain a bandwidth manager. Furthermore BS's bandwidth manager works together with the uplink scheduler to determine total bandwidth available and allocation size for each service flow. Bandwidth request mechanism is a key feature of the WiMAX scheduler since all three non-UGS services explicitly request for bandwidth by sending a bandwidth request to BS.

Definition at line 54 of file bandwidth-manager.h.

Constructor & Destructor Documentation

ns3::BandwidthManager::BandwidthManager ( Ptr< WimaxNetDevice > device )

Definition at line 49 of file bandwidth-manager.cc.

ns3::BandwidthManager::~BandwidthManager ( void )

Definition at line 55 of file bandwidth-manager.cc.

ns3::BandwidthManager::BandwidthManager ( const BandwidthManager & )

private

Member Function Documentation

uint32_t ns3::BandwidthManager::CalculateAllocationSize	(	const SSRecord *	ssRecord,
		const ServiceFlow *	serviceFlow
	)

Definition at line 66 of file bandwidth-manager.cc.

References ns3::BaseStationNetDevice::GetBwReqOppSize(), ns3::ServiceFlowRecord::GetGrantSize(), ns3::ServiceFlowRecord::GetGrantTimeStamp(), ns3::SSRecord::GetHasServiceFlowUgs(), ns3::Object::GetObject(), ns3::SSRecord::GetPollMeBit(), ns3::ServiceFlow::GetRecord(), ns3::ServiceFlow::GetSchedulingType(), ns3::ServiceFlow::GetUnsolicitedGrantInterval(), ns3::ServiceFlow::GetUnsolicitedPollingInterval(), m_device, ns3::Now(), NS_FATAL_ERROR, ns3::ServiceFlowRecord::SetGrantTimeStamp(), ns3::ServiceFlow::SF_TYPE_BE, ns3::ServiceFlow::SF_TYPE_NRTPS, ns3::ServiceFlow::SF_TYPE_RTPS, and ns3::ServiceFlow::SF_TYPE_UGS.

Referenced by ns3::UplinkSchedulerSimple::ServiceUnsolicitedGrants(), ns3::UplinkSchedulerRtps::ServiceUnsolicitedGrants(), and ns3::UplinkSchedulerMBQoS::ServiceUnsolicitedGrants().

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void ns3::BandwidthManager::DoDispose ( void )

virtual

This method is called by Object::Dispose or by the object's destructor, whichever comes first.

Subclasses are expected to implement their real destruction code in an overriden version of this method and chain up to their parent's implementation once they are done. i.e., for simplicity, the destructor of every subclass should be empty and its content should be moved to the associated DoDispose method.

It is safe to call GetObject from within this method.

Reimplemented from ns3::Object.

Definition at line 60 of file bandwidth-manager.cc.

References m_device.

uint32_t ns3::BandwidthManager::GetSymbolsPerFrameAllocated ( void )

Definition at line 217 of file bandwidth-manager.cc.

References ns3::Object::GetObject(), ns3::BaseStationNetDevice::GetSSManager(), ns3::SSManager::GetSSRecords(), m_device, and ns3::ServiceFlow::SF_TYPE_ALL.

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