A Discrete-Event Network Simulator
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ns3::BandwidthManager Class Reference

This class manage the bandwidth request and grant mechanism. More...

#include "bandwidth-manager.h"

+ Inheritance diagram for ns3::BandwidthManager:
+ Collaboration diagram for ns3::BandwidthManager:

Public Member Functions

 BandwidthManager (const BandwidthManager &)=delete
 
 BandwidthManager (Ptr< WimaxNetDevice > device)
 Constructor.
 
 ~BandwidthManager () override
 
uint32_t CalculateAllocationSize (const SSRecord *ssRecord, const ServiceFlow *serviceFlow)
 Calculate allocation size function.
 
void DoDispose () override
 Destructor implementation.
 
uint32_t GetSymbolsPerFrameAllocated ()
 Get symbols per frame allocated.
 
BandwidthManageroperator= (const BandwidthManager &)=delete
 
void ProcessBandwidthRequest (const BandwidthRequestHeader &bwRequestHdr)
 Process bandwidth request.
 
ServiceFlowSelectFlowForRequest (uint32_t &bytesToRequest)
 Select flow for request function.
 
void SendBandwidthRequest (uint8_t uiuc, uint16_t allocationSize)
 Send bandwidth request.
 
void SetSubframeRatio ()
 Set subframe ratio.
 
- 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 Attributes

Ptr< WimaxNetDevicem_device
 the device
 
uint16_t m_nrBwReqsSent
 bandwidth requests sent
 

Additional Inherited Members

- Protected Member Functions inherited from ns3::Object
 Object (const Object &o)
 Copy an Object.
 
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

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.

Config Paths

ns3::BandwidthManager is accessible through the following paths with Config::Set and Config::Connect:

  • "/NodeList/[i]/DeviceList/[i]/$ns3::WimaxNetDevice/BandwidthManager"

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

Size of this type is 72 bytes (on a 64-bit architecture).

Definition at line 45 of file bandwidth-manager.h.

Constructor & Destructor Documentation

◆ BandwidthManager() [1/2]

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

Constructor.

Parameters
deviceWIMAX device

Definition at line 40 of file bandwidth-manager.cc.

◆ ~BandwidthManager()

ns3::BandwidthManager::~BandwidthManager ( )
override

Definition at line 46 of file bandwidth-manager.cc.

◆ BandwidthManager() [2/2]

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

Member Function Documentation

◆ CalculateAllocationSize()

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

◆ DoDispose()

void ns3::BandwidthManager::DoDispose ( )
overridevirtual

Destructor implementation.

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

Subclasses are expected to implement their real destruction code in an overridden 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 51 of file bandwidth-manager.cc.

References m_device.

◆ GetSymbolsPerFrameAllocated()

uint32_t ns3::BandwidthManager::GetSymbolsPerFrameAllocated ( )

Get symbols per frame allocated.

Returns
the symbols per the frame allocated

Definition at line 208 of file bandwidth-manager.cc.

References m_device, and ns3::ServiceFlow::SF_TYPE_ALL.

◆ GetTypeId()

TypeId ns3::BandwidthManager::GetTypeId ( )
static

Get the type ID.

Returns
the object TypeId

Definition at line 34 of file bandwidth-manager.cc.

References ns3::TypeId::SetParent().

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◆ operator=()

BandwidthManager & ns3::BandwidthManager::operator= ( const BandwidthManager & )
delete

◆ ProcessBandwidthRequest()

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

Process bandwidth request.

Parameters
bwRequestHdrthe bandwidth request

Definition at line 172 of file bandwidth-manager.cc.

References ns3::BandwidthRequestHeader::GetBr(), ns3::BandwidthRequestHeader::GetCid(), ns3::BandwidthRequestHeader::GetType(), ns3::BandwidthRequestHeader::HEADER_TYPE_INCREMENTAL, and m_device.

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◆ SelectFlowForRequest()

ServiceFlow * ns3::BandwidthManager::SelectFlowForRequest ( uint32_t & bytesToRequest)

Select flow for request function.

Parameters
bytesToRequestbytes to request
Returns
a service flow

Definition at line 108 of file bandwidth-manager.cc.

References ns3::ServiceFlow::GetQueue(), ns3::ServiceFlow::GetSchedulingType(), ns3::ServiceFlow::HasPackets(), ns3::MacHeaderType::HEADER_TYPE_GENERIC, m_device, ns3::ServiceFlow::SF_TYPE_ALL, ns3::ServiceFlow::SF_TYPE_BE, ns3::ServiceFlow::SF_TYPE_NRTPS, and ns3::ServiceFlow::SF_TYPE_RTPS.

Referenced by SendBandwidthRequest().

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◆ SendBandwidthRequest()

void ns3::BandwidthManager::SendBandwidthRequest ( uint8_t uiuc,
uint16_t allocationSize )

Send bandwidth request.

Parameters
uiucthe UIUC
allocationSizethe allocation size

Definition at line 137 of file bandwidth-manager.cc.

References ns3::Create(), ns3::ServiceFlow::GetConnection(), ns3::BandwidthRequestHeader::HEADER_TYPE_AGGREGATE, ns3::MacHeaderType::HEADER_TYPE_BANDWIDTH, m_device, m_nrBwReqsSent, NS_ASSERT_MSG, SelectFlowForRequest(), ns3::BandwidthRequestHeader::SetBr(), ns3::BandwidthRequestHeader::SetCid(), ns3::BandwidthRequestHeader::SetType(), and ns3::OfdmUlBurstProfile::UIUC_REQ_REGION_FULL.

Referenced by ns3::SubscriberStationNetDevice::ProcessUlMap().

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◆ SetSubframeRatio()

void ns3::BandwidthManager::SetSubframeRatio ( )

Set subframe ratio.

Definition at line 193 of file bandwidth-manager.cc.

References m_device.

Member Data Documentation

◆ m_device

◆ m_nrBwReqsSent

uint16_t ns3::BandwidthManager::m_nrBwReqsSent
private

bandwidth requests sent

Definition at line 101 of file bandwidth-manager.h.

Referenced by SendBandwidthRequest().


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