This class implements a Migration-based Quality of Service uplink scheduler(MBQoS). More...

#include <bs-uplink-scheduler-mbqos.h>

Inheritance diagram for ns3::UplinkSchedulerMBQoS:

Collaboration diagram for ns3::UplinkSchedulerMBQoS:

Public Member Functions
	UplinkSchedulerMBQoS ()
	UplinkSchedulerMBQoS (Time time)
	~UplinkSchedulerMBQoS (void)
void	AddUplinkAllocation (OfdmUlMapIe &ulMapIe, const uint32_t &allocationSize, uint32_t &symbolsToAllocation, uint32_t &availableSymbols)
void	AllocateInitialRangingInterval (uint32_t &symbolsToAllocation, uint32_t &availableSymbols)
uint32_t	CalculateAllocationStartTime (void)
void	CheckDeadline (uint32_t &availableSymbols)
	Check deadline from jobs. Migrate requests if necessary.
void	CheckMinimumBandwidth (uint32_t &availableSymbols)
	Check if Minimum bandwidth is guarantee. Migrate requests if necessary.
uint32_t	CountSymbolsJobs (Ptr< UlJob > job)
uint32_t	CountSymbolsQueue (std::list< Ptr< UlJob > > jobs)
Ptr< UlJob >	CreateUlJob (SSRecord *ssRecord, enum ServiceFlow::SchedulingType schedType, ReqType reqType)
Ptr< UlJob >	DequeueJob (UlJob::JobPriority priority)
	Dequeue a job from a priority queue.
Time	DetermineDeadline (ServiceFlow *serviceFlow)
	Calculates deadline of a request.
void	EnqueueJob (UlJob::JobPriority priority, Ptr< UlJob > job)
	Enqueue a job in a priority queue.
void	GetChannelDescriptorsToUpdate (bool &, bool &, bool &, bool &)
uint32_t	GetPendingSize (ServiceFlow *serviceFlow)
std::list< OfdmUlMapIe >	GetUplinkAllocations (void) const
void	InitOnce (void)
void	OnSetRequestedBandwidth (ServiceFlowRecord *sfr)
void	ProcessBandwidthRequest (const BandwidthRequestHeader &bwRequestHdr)
void	Schedule (void)
void	ServiceBandwidthRequests (const SSRecord *ssRecord, enum ServiceFlow::SchedulingType schedulingType, OfdmUlMapIe &ulMapIe, const WimaxPhy::ModulationType modulationType, uint32_t &symbolsToAllocation, uint32_t &availableSymbols)
bool	ServiceBandwidthRequests (ServiceFlow *serviceFlow, enum ServiceFlow::SchedulingType schedulingType, OfdmUlMapIe &ulMapIe, const WimaxPhy::ModulationType modulationType, uint32_t &symbolsToAllocation, uint32_t &availableSymbols)
bool	ServiceBandwidthRequestsBytes (ServiceFlow *serviceFlow, enum ServiceFlow::SchedulingType schedulingType, OfdmUlMapIe &ulMapIe, const WimaxPhy::ModulationType modulationType, uint32_t &symbolsToAllocation, uint32_t &availableSymbols, uint32_t allocationSizeBytes)
void	ServiceUnsolicitedGrants (const SSRecord *ssRecord, enum ServiceFlow::SchedulingType schedulingType, OfdmUlMapIe &ulMapIe, const WimaxPhy::ModulationType modulationType, uint32_t &symbolsToAllocation, uint32_t &availableSymbols)
void	SetupServiceFlow (SSRecord ssRecord, ServiceFlow serviceFlow)
void	UplinkSchedWindowTimer (void)
	Reset the current window. According to a configured time, reset the window.
Public Member Functions inherited from ns3::UplinkScheduler
	UplinkScheduler (void)
	UplinkScheduler (Ptr< BaseStationNetDevice > bs)
virtual	~UplinkScheduler (void)
virtual Ptr< BaseStationNetDevice >	GetBs (void)
virtual Time	GetDcdTimeStamp (void) const
virtual bool	GetIsInvIrIntrvlAllocated (void) const
virtual bool	GetIsIrIntrvlAllocated (void) const
virtual uint8_t	GetNrIrOppsAllocated (void) const
virtual Time	GetTimeStampIrInterval (void)
virtual Time	GetUcdTimeStamp (void) const
virtual void	SetBs (Ptr< BaseStationNetDevice > bs)
virtual void	SetDcdTimeStamp (Time dcdTimeStamp)
virtual void	SetIsInvIrIntrvlAllocated (bool isInvIrIntrvlAllocated)
virtual void	SetIsIrIntrvlAllocated (bool isIrIntrvlAllocated)
virtual void	SetNrIrOppsAllocated (uint8_t nrIrOppsAllocated)
virtual void	SetTimeStampIrInterval (Time timeStampIrInterval)
virtual void	SetUcdTimeStamp (Time ucdTimeStamp)
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::UplinkSchedulerMBQoS.

Private Attributes
std::list< OfdmUlMapIe >	m_uplinkAllocations
std::list< Ptr< UlJob > >	m_uplinkJobs_high
std::list< Ptr< UlJob > >	m_uplinkJobs_inter
std::list< Ptr< UlJob > >	m_uplinkJobs_low
Time	m_windowInterval

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

This class implements a Migration-based Quality of Service uplink scheduler(MBQoS).

This uplink scheduler uses three queues, the low priority queue, the intermediate queue and the high priority queue. The scheduler serves the requests in strict priority order from the high priority queue to the low priority queue. The low priority queue stores the bandwidth requests of the BE service flow. The intermediate queue holds bandwidth requests sent by rtPS and by nrtPS connections. rtPS and nrtPS requests can migrate to the high priority queue to guarantee that their QoS requirements are met. Besides the requests migrated from the intermediate queue, the high priority queue stores periodic grants and unicast request opportunities that must be scheduled in the following frame. To guarantee the maximum delay requirement, the BS assigns a deadline to each rtPS bandwidth request in the intermediate queue. The minimum bandwidth requirement of both rtPS and nrtPS connections is guaranteed over a window of duration T . Implementation of uplink scheduler: Freitag, J.; da Fonseca, N.L.S., "Uplink Scheduling with Quality of Service in IEEE 802.16 Networks," Global Telecommunications Conference, 2007. GLOBECOM '07. IEEE , vol., no., pp.2503-2508, 26-30 Nov. 2007 URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4411386&isnumber=4410910

Definition at line 69 of file bs-uplink-scheduler-mbqos.h.

Constructor & Destructor Documentation

ns3::UplinkSchedulerMBQoS::UplinkSchedulerMBQoS ( )

Definition at line 38 of file bs-uplink-scheduler-mbqos.cc.

ns3::UplinkSchedulerMBQoS::UplinkSchedulerMBQoS ( Time time )

Definition at line 42 of file bs-uplink-scheduler-mbqos.cc.

ns3::UplinkSchedulerMBQoS::~UplinkSchedulerMBQoS ( void )

Definition at line 48 of file bs-uplink-scheduler-mbqos.cc.

References m_uplinkAllocations, and ns3::UplinkScheduler::SetBs().

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Member Function Documentation

void ns3::UplinkSchedulerMBQoS::AddUplinkAllocation	(	OfdmUlMapIe &	ulMapIe,
		const uint32_t &	allocationSize,
		uint32_t &	symbolsToAllocation,
		uint32_t &	availableSymbols
	)

virtual

Implements ns3::UplinkScheduler.

Definition at line 147 of file bs-uplink-scheduler-mbqos.cc.

References m_uplinkAllocations, ns3::OfdmUlMapIe::SetDuration(), and ns3::OfdmUlMapIe::SetStartTime().

Referenced by AllocateInitialRangingInterval(), Schedule(), ServiceBandwidthRequests(), ServiceBandwidthRequestsBytes(), and ServiceUnsolicitedGrants().

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void ns3::UplinkSchedulerMBQoS::AllocateInitialRangingInterval	(	uint32_t &	symbolsToAllocation,
		uint32_t &	availableSymbols
	)

virtual

Implements ns3::UplinkScheduler.

Definition at line 967 of file bs-uplink-scheduler-mbqos.cc.

References AddUplinkAllocation(), CalculateAllocationStartTime(), ns3::UplinkScheduler::GetBs(), ns3::UplinkScheduler::GetNrIrOppsAllocated(), ns3::BaseStationNetDevice::GetRangReqOppSize(), ns3::UplinkScheduler::GetTimeStampIrInterval(), ns3::BaseStationNetDevice::MarkRangingOppStart(), ns3::Now(), ns3::Simulator::Now(), NS_LOG_DEBUG, ns3::Seconds(), ns3::OfdmUlMapIe::SetCid(), ns3::UplinkScheduler::SetIsIrIntrvlAllocated(), ns3::UplinkScheduler::SetNrIrOppsAllocated(), ns3::OfdmUlMapIe::SetStartTime(), ns3::UplinkScheduler::SetTimeStampIrInterval(), ns3::OfdmUlMapIe::SetUiuc(), and ns3::OfdmUlBurstProfile::UIUC_INITIAL_RANGING.

Referenced by Schedule().

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uint32_t ns3::UplinkSchedulerMBQoS::CalculateAllocationStartTime ( void )

virtual

Implements ns3::UplinkScheduler.

Definition at line 141 of file bs-uplink-scheduler-mbqos.cc.

References ns3::UplinkScheduler::GetBs(), ns3::BaseStationNetDevice::GetNrDlSymbols(), ns3::WimaxNetDevice::GetPhy(), ns3::WimaxPhy::GetPsPerSymbol(), and ns3::WimaxNetDevice::GetTtg().

Referenced by AllocateInitialRangingInterval().

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void ns3::UplinkSchedulerMBQoS::CheckDeadline ( uint32_t & availableSymbols )

Check deadline from jobs. Migrate requests if necessary.

Parameters

availableSymbols available symbols in the uplink frame This method verifies for each rtPS request whether it should be migrated to the high priority queue or not. The conditions for migration are: request deadline expires in the frame following the next one, and the amount of bandwidth requested is less than or equal to the amount of available bytes in the next uplink frame.

Definition at line 648 of file bs-uplink-scheduler-mbqos.cc.

References EnqueueJob(), visualizer.higcontainer::frame, ns3::UplinkScheduler::GetBs(), ns3::UlJob::GetDeadline(), ns3::WimaxPhy::GetFrameDuration(), ns3::ServiceFlow::GetMinReservedTrafficRate(), ns3::SSRecord::GetModulationType(), ns3::WimaxPhy::GetNrBytes(), ns3::WimaxPhy::GetNrSymbols(), ns3::UlJob::GetPeriod(), ns3::WimaxNetDevice::GetPhy(), ns3::UlJob::GetReleaseTime(), ns3::UlJob::GetSchedulingType(), ns3::Time::GetSeconds(), ns3::UlJob::GetServiceFlow(), ns3::UlJob::GetSize(), ns3::UlJob::GetSsRecord(), ns3::UlJob::GetType(), ns3::UlJob::HIGH, ns3::WimaxNetDevice::m_frameStartTime, m_uplinkJobs_inter, ns3::Simulator::Now(), NS_LOG_DEBUG, ns3::UlJob::SetDeadline(), ns3::UlJob::SetPeriod(), ns3::UlJob::SetReleaseTime(), ns3::UlJob::SetSchedulingType(), ns3::UlJob::SetServiceFlow(), ns3::UlJob::SetSize(), ns3::UlJob::SetSsRecord(), ns3::UlJob::SetType(), and ns3::ServiceFlow::SF_TYPE_RTPS.

Referenced by Schedule().

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void ns3::UplinkSchedulerMBQoS::CheckMinimumBandwidth ( uint32_t & availableSymbols )

Check if Minimum bandwidth is guarantee. Migrate requests if necessary.

Parameters

availableSymbols available symbols in the uplink frame. This method first calculate a priority value for each request in the intermediate queue. Then, sorts the intermediate queue according to the priority values. Finally, while there is available bandwidth, the scheduler migrate the requests to the high priority queue.

Definition at line 736 of file bs-uplink-scheduler-mbqos.cc.

Referenced by Schedule().

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uint32_t ns3::UplinkSchedulerMBQoS::CountSymbolsJobs ( Ptr< UlJob > job )

Parameters

job job

Count the amount of symbols of a job.

Definition at line 570 of file bs-uplink-scheduler-mbqos.cc.

References ns3::UplinkScheduler::GetBs(), ns3::BaseStationNetDevice::GetBwReqOppSize(), ns3::ServiceFlowRecord::GetGrantedBandwidth(), ns3::ServiceFlowRecord::GetGrantTimeStamp(), ns3::SSRecord::GetModulationType(), ns3::WimaxPhy::GetNrSymbols(), ns3::WimaxNetDevice::GetPhy(), ns3::ServiceFlow::GetRecord(), ns3::ServiceFlowRecord::GetRequestedBandwidth(), ns3::ServiceFlow::GetSduSize(), ns3::UlJob::GetServiceFlow(), ns3::UlJob::GetSsRecord(), ns3::UlJob::GetType(), ns3::ServiceFlow::GetUnsolicitedPollingInterval(), ns3::Now(), and ns3::UNICAST_POLLING.

Referenced by CheckMinimumBandwidth(), and CountSymbolsQueue().

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uint32_t ns3::UplinkSchedulerMBQoS::CountSymbolsQueue ( std::list< Ptr< UlJob > > jobs )

Parameters

jobs	List of jobs

Sum the amount of symbols of each job of a queue

Definition at line 545 of file bs-uplink-scheduler-mbqos.cc.

References CountSymbolsJobs(), and list.

Referenced by Schedule().

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Ptr< UlJob > ns3::UplinkSchedulerMBQoS::CreateUlJob	(	SSRecord *	ssRecord,
		enum ServiceFlow::SchedulingType	schedType,
		ReqType	reqType
	)

Parameters

ssRecord	Subscriber station record
schedType	Service flow type
reqType	Type of packet

Create and fill information of a job.

Definition at line 559 of file bs-uplink-scheduler-mbqos.cc.

References ns3::SSRecord::GetServiceFlows(), ns3::UlJob::SetSchedulingType(), ns3::UlJob::SetServiceFlow(), ns3::UlJob::SetSsRecord(), and ns3::UlJob::SetType().

Referenced by Schedule().

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Ptr< UlJob > ns3::UplinkSchedulerMBQoS::DequeueJob ( UlJob::JobPriority priority )

Dequeue a job from a priority queue.

Parameters

priority Priority of queue

Definition at line 627 of file bs-uplink-scheduler-mbqos.cc.

References ns3::UlJob::HIGH, ns3::UlJob::INTERMEDIATE, ns3::UlJob::LOW, m_uplinkJobs_high, m_uplinkJobs_inter, and m_uplinkJobs_low.

Time ns3::UplinkSchedulerMBQoS::DetermineDeadline ( ServiceFlow * serviceFlow )

Calculates deadline of a request.

Parameters

serviceFlow Service flow of connection

Definition at line 1145 of file bs-uplink-scheduler-mbqos.cc.

References ns3::ServiceFlowRecord::GetLastGrantTime(), ns3::ServiceFlow::GetMaximumLatency(), ns3::ServiceFlow::GetRecord(), and ns3::MilliSeconds().

Referenced by ProcessBandwidthRequest().

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void ns3::UplinkSchedulerMBQoS::EnqueueJob	(	UlJob::JobPriority	priority,
		Ptr< UlJob >	job
	)

Enqueue a job in a priority queue.

Parameters

priority	Priority of queue
job	job information

Definition at line 611 of file bs-uplink-scheduler-mbqos.cc.

References ns3::UlJob::HIGH, ns3::UlJob::INTERMEDIATE, ns3::UlJob::LOW, m_uplinkJobs_high, m_uplinkJobs_inter, and m_uplinkJobs_low.

Referenced by CheckDeadline(), CheckMinimumBandwidth(), ProcessBandwidthRequest(), and Schedule().

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void ns3::UplinkSchedulerMBQoS::GetChannelDescriptorsToUpdate	(	bool &	updateDcd,
		bool &	updateUcd,
		bool &	sendDcd,
		bool &	sendUcd
	)

virtual

Determines if channel descriptors sent in the current frame are required to be updated

Implements ns3::UplinkScheduler.

Definition at line 82 of file bs-uplink-scheduler-mbqos.cc.

References ns3::UplinkScheduler::GetBs(), ns3::UplinkScheduler::GetDcdTimeStamp(), ns3::UplinkScheduler::GetUcdTimeStamp(), ns3::Now(), ns3::Simulator::Now(), ns3::UplinkScheduler::SetDcdTimeStamp(), and ns3::UplinkScheduler::SetUcdTimeStamp().

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uint32_t ns3::UplinkSchedulerMBQoS::GetPendingSize ( ServiceFlow * serviceFlow )

Definition at line 1058 of file bs-uplink-scheduler-mbqos.cc.

References ns3::UlJob::GetServiceFlow(), ns3::UlJob::GetSize(), list, and m_uplinkJobs_inter.

Referenced by ProcessBandwidthRequest().

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TypeId ns3::UplinkSchedulerMBQoS::GetTypeId ( void )

static

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

This object is accessible through the following paths with Config::Set and Config::Connect:

/NodeList/[i]/DeviceList/[i]/$ns3::BaseStationNetDevice/UplinkScheduler/$ns3::UplinkSchedulerMBQoS
/NodeList/[i]/DeviceList/[i]/$ns3::WimaxNetDevice/$ns3::BaseStationNetDevice/UplinkScheduler/$ns3::UplinkSchedulerMBQoS

Attributes defined for this type:

WindowInterval: The time to wait to reset window
- Set with class: TimeValue
- Underlying type: Time
- Initial value: +1000000000.0ns
- Flags: construct write read

No TraceSources defined for this type.

Reimplemented from ns3::UplinkScheduler.

Definition at line 55 of file bs-uplink-scheduler-mbqos.cc.

References m_windowInterval, ns3::Seconds(), and ns3::TypeId::SetParent().

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std::list< OfdmUlMapIe > ns3::UplinkSchedulerMBQoS::GetUplinkAllocations ( void ) const

virtual

Reimplemented from ns3::UplinkScheduler.

Definition at line 76 of file bs-uplink-scheduler-mbqos.cc.

References m_uplinkAllocations.

void ns3::UplinkSchedulerMBQoS::InitOnce ( void )

virtual

This method is called once to initialize window.

Implements ns3::UplinkScheduler.

Definition at line 70 of file bs-uplink-scheduler-mbqos.cc.

References UplinkSchedWindowTimer().

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void ns3::UplinkSchedulerMBQoS::OnSetRequestedBandwidth ( ServiceFlowRecord * sfr )

virtual

Implements ns3::UplinkScheduler.

Definition at line 1154 of file bs-uplink-scheduler-mbqos.cc.

void ns3::UplinkSchedulerMBQoS::ProcessBandwidthRequest ( const BandwidthRequestHeader & bwRequestHdr )

virtual

Implements ns3::UplinkScheduler.

Definition at line 1080 of file bs-uplink-scheduler-mbqos.cc.

References ns3::DATA, DetermineDeadline(), EnqueueJob(), ns3::BandwidthRequestHeader::GetBr(), ns3::UplinkScheduler::GetBs(), ns3::BandwidthRequestHeader::GetCid(), ns3::ConnectionManager::GetConnection(), ns3::WimaxNetDevice::GetConnectionManager(), ns3::SSRecord::GetMacAddress(), GetPendingSize(), ns3::ServiceFlow::GetSchedulingType(), ns3::Time::GetSeconds(), ns3::BaseStationNetDevice::GetSSManager(), ns3::SSManager::GetSSRecord(), ns3::UlJob::INTERMEDIATE, ns3::UlJob::LOW, ns3::Now(), ns3::Simulator::Now(), NS_LOG_DEBUG, ns3::UlJob::SetDeadline(), ns3::UlJob::SetPeriod(), ns3::UlJob::SetReleaseTime(), ns3::UlJob::SetSchedulingType(), ns3::UlJob::SetServiceFlow(), ns3::UlJob::SetSize(), ns3::UlJob::SetSsRecord(), ns3::UlJob::SetType(), ns3::ServiceFlow::SF_TYPE_BE, ns3::ServiceFlow::SF_TYPE_NRTPS, and ns3::ServiceFlow::SF_TYPE_RTPS.

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void ns3::UplinkSchedulerMBQoS::Schedule ( void )

virtual

Implements ns3::UplinkScheduler.

Definition at line 216 of file bs-uplink-scheduler-mbqos.cc.

Referenced by UplinkSchedWindowTimer().

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void ns3::UplinkSchedulerMBQoS::ServiceBandwidthRequests	(	const SSRecord *	ssRecord,
		enum ServiceFlow::SchedulingType	schedulingType,
		OfdmUlMapIe &	ulMapIe,
		const WimaxPhy::ModulationType	modulationType,
		uint32_t &	symbolsToAllocation,
		uint32_t &	availableSymbols
	)

virtual

Implements ns3::UplinkScheduler.

Definition at line 881 of file bs-uplink-scheduler-mbqos.cc.

References ns3::SSRecord::GetServiceFlows().

Referenced by Schedule().

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bool ns3::UplinkSchedulerMBQoS::ServiceBandwidthRequests	(	ServiceFlow *	serviceFlow,
		enum ServiceFlow::SchedulingType	schedulingType,
		OfdmUlMapIe &	ulMapIe,
		const WimaxPhy::ModulationType	modulationType,
		uint32_t &	symbolsToAllocation,
		uint32_t &	availableSymbols
	)

virtual

Implements ns3::UplinkScheduler.

Definition at line 905 of file bs-uplink-scheduler-mbqos.cc.

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bool ns3::UplinkSchedulerMBQoS::ServiceBandwidthRequestsBytes	(	ServiceFlow *	serviceFlow,
		enum ServiceFlow::SchedulingType	schedulingType,
		OfdmUlMapIe &	ulMapIe,
		const WimaxPhy::ModulationType	modulationType,
		uint32_t &	symbolsToAllocation,
		uint32_t &	availableSymbols,
		uint32_t	allocationSizeBytes
	)

Definition at line 493 of file bs-uplink-scheduler-mbqos.cc.

References AddUplinkAllocation(), ns3::UplinkScheduler::GetBs(), ns3::WimaxConnection::GetCid(), ns3::ServiceFlow::GetConnection(), ns3::WimaxPhy::GetNrSymbols(), ns3::WimaxNetDevice::GetPhy(), ns3::ServiceFlow::GetRecord(), ns3::ServiceFlowRecord::GetRequestedBandwidth(), ns3::ServiceFlow::GetSchedulingTypeStr(), ns3::ServiceFlow::GetSfid(), ns3::Simulator::Now(), NS_LOG_DEBUG, ns3::ServiceFlowRecord::UpdateBwSinceLastExpiry(), ns3::ServiceFlowRecord::UpdateGrantedBandwidth(), ns3::ServiceFlowRecord::UpdateGrantedBandwidthTemp(), and ns3::ServiceFlowRecord::UpdateRequestedBandwidth().

Referenced by Schedule().

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void ns3::UplinkSchedulerMBQoS::ServiceUnsolicitedGrants	(	const SSRecord *	ssRecord,
		enum ServiceFlow::SchedulingType	schedulingType,
		OfdmUlMapIe &	ulMapIe,
		const WimaxPhy::ModulationType	modulationType,
		uint32_t &	symbolsToAllocation,
		uint32_t &	availableSymbols
	)