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ns3::MacLow Class Reference

handle RTS/CTS/DATA/ACK transactions. More...

#include <mac-low.h>

+ Inheritance diagram for ns3::MacLow:
+ Collaboration diagram for ns3::MacLow:

Public Types

typedef Callback< void, Ptr
< Packet >, const
WifiMacHeader * > 
MacLowRxCallback
 typedef for a callback for MacLowRx More...
 

Public Member Functions

 MacLow ()
 
virtual ~MacLow ()
 
Time CalculateTransmissionTime (Ptr< const Packet > packet, const WifiMacHeader *hdr, const MacLowTransmissionParameters &parameters) const
 
void CreateBlockAckAgreement (const MgtAddBaResponseHeader *respHdr, Mac48Address originator, uint16_t startingSeq)
 
void DestroyBlockAckAgreement (Mac48Address originator, uint8_t tid)
 
Time GetAckTimeout (void) const
 Return ACK timeout of this MacLow. More...
 
Mac48Address GetAddress (void) const
 Return the MAC address of this MacLow. More...
 
Time GetBasicBlockAckTimeout () const
 Return Basic Block ACK timeout of this MacLow. More...
 
Mac48Address GetBssid (void) const
 Return the Basic Service Set Identification. More...
 
Time GetCompressedBlockAckTimeout () const
 Return Compressed Block ACK timeout of this MacLow. More...
 
Time GetCtsTimeout (void) const
 Return CTS timeout of this MacLow. More...
 
bool GetCtsToSelfSupported () const
 Return whether CTS-to-self capability is supported. More...
 
Time GetPifs (void) const
 Return PCF Interframe Space (PIFS) of this MacLow. More...
 
Time GetRifs (void) const
 Return Reduced Interframe Space (RIFS) of this MacLow. More...
 
Time GetSifs (void) const
 Return Short Interframe Space (SIFS) of this MacLow. More...
 
Time GetSlotTime (void) const
 Return slot duration of this MacLow. More...
 
bool IsPromisc (void) const
 Check if MacLow is operating in promiscuous mode. More...
 
void NotifySwitchingStartNow (Time duration)
 
void ReceiveError (Ptr< const Packet > packet, double rxSnr)
 
void ReceiveOk (Ptr< Packet > packet, double rxSnr, WifiMode txMode, WifiPreamble preamble)
 
void RegisterBlockAckListenerForAc (enum AcIndex ac, MacLowBlockAckEventListener *listener)
 
void RegisterDcfListener (MacLowDcfListener *listener)
 
void SetAckTimeout (Time ackTimeout)
 Set ACK timeout of this MacLow. More...
 
void SetAddress (Mac48Address ad)
 Set MAC address of this MacLow. More...
 
void SetBasicBlockAckTimeout (Time blockAckTimeout)
 Set Basic Block ACK timeout of this MacLow. More...
 
void SetBssid (Mac48Address ad)
 Set the Basic Service Set Identification. More...
 
void SetCompressedBlockAckTimeout (Time blockAckTimeout)
 Set Compressed Block ACK timeout of this MacLow. More...
 
void SetCtsTimeout (Time ctsTimeout)
 Set CTS timeout of this MacLow. More...
 
void SetCtsToSelfSupported (bool enable)
 Enable or disable CTS-to-self capability. More...
 
void SetPhy (Ptr< WifiPhy > phy)
 Set up WifiPhy associated with this MacLow. More...
 
void SetPifs (Time pifs)
 Set PCF Interframe Space (PIFS) of this MacLow. More...
 
void SetPromisc (void)
 Enable promiscuous mode. More...
 
void SetRifs (Time rifs)
 Set Reduced Interframe Space (RIFS) of this MacLow. More...
 
void SetRxCallback (Callback< void, Ptr< Packet >, const WifiMacHeader * > callback)
 
void SetSifs (Time sifs)
 Set Short Interframe Space (SIFS) of this MacLow. More...
 
void SetSlotTime (Time slotTime)
 Set slot duration of this MacLow. More...
 
void SetWifiRemoteStationManager (Ptr< WifiRemoteStationManager > manager)
 Set up WifiRemoteStationManager associated with this MacLow. More...
 
void StartTransmission (Ptr< const Packet > packet, const WifiMacHeader *hdr, MacLowTransmissionParameters parameters, MacLowTransmissionListener *listener)
 
- Public Member Functions inherited from ns3::Object
 Object ()
 
virtual ~Object ()
 
void AggregateObject (Ptr< Object > other)
 
void Dispose (void)
 Run the DoDispose methods of this object and all the objects aggregated to it. More...
 
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 Initialize (void)
 This method calls the virtual DoInitialize method on all the objects aggregated to this object. More...
 
- Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
 SimpleRefCount ()
 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. 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
 
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)
 

Protected Member Functions

virtual WifiTxVector GetDataTxVector (Ptr< const Packet > packet, const WifiMacHeader *hdr) const
 Return a TXVECTOR for the DATA frame given the destination. More...
 
- Protected Member Functions inherited from ns3::Object
 Object (const Object &o)
 
virtual void DoInitialize (void)
 This method is called only once by Object::Initialize. More...
 
virtual void NotifyNewAggregate (void)
 This method is invoked whenever two sets of objects are aggregated together. More...
 
- Protected Member Functions inherited from ns3::ObjectBase
void ConstructSelf (const AttributeConstructionList &attributes)
 
virtual void NotifyConstructionCompleted (void)
 This method is invoked once all member attributes have been initialized. More...
 

Private Types

typedef std::pair
< Mac48Address, uint8_t > 
AgreementKey
 
typedef std::map< AgreementKey,
AgreementValue
Agreements
 
typedef std::map< AgreementKey,
AgreementValue >::iterator 
AgreementsI
 
typedef std::pair
< BlockAckAgreement, std::list
< BufferedPacket > > 
AgreementValue
 
typedef std::map< AgreementKey,
BlockAckCache
BlockAckCaches
 
typedef std::map< AgreementKey,
BlockAckCache >::iterator 
BlockAckCachesI
 
typedef std::pair< Ptr< Packet >
, WifiMacHeader
BufferedPacket
 
typedef std::list
< BufferedPacket >::iterator 
BufferedPacketI
 
typedef std::vector
< MacLowDcfListener * > 
DcfListeners
 typedef for a list of MacLowDcfListener. More...
 
typedef std::vector
< MacLowDcfListener * >
::const_iterator 
DcfListenersCI
 typedef for an iterator for a list of MacLowDcfListener. More...
 
typedef std::map< AcIndex,
MacLowBlockAckEventListener * > 
QueueListeners
 

Private Member Functions

void BlockAckTimeout (void)
 Event handler when block ACK timeout occurs. More...
 
Time CalculateOverallTxTime (Ptr< const Packet > packet, const WifiMacHeader *hdr, const MacLowTransmissionParameters &params) const
 
void CancelAllEvents (void)
 Cancel all scheduled events. More...
 
void CtsTimeout (void)
 Event handler when CTS timeout occurs. More...
 
virtual void DoDispose (void)
 This method is called by Object::Dispose or by the object's destructor, whichever comes first. More...
 
void DoNavResetNow (Time duration)
 Reset NAV with the given duration. More...
 
bool DoNavStartNow (Time duration)
 Start NAV with the given duration. More...
 
void EndTxNoAck (void)
 A transmission that does not require an ACK has completed. More...
 
void FastAckFailedTimeout (void)
 Event handler when fast ACK timeout occurs (busy). More...
 
void FastAckTimeout (void)
 Event handler when fast ACK timeout occurs (idle). More...
 
void ForwardDown (Ptr< const Packet > packet, const WifiMacHeader *hdr, WifiTxVector txVector, WifiPreamble preamble)
 Forward the packet down to WifiPhy for transmission. More...
 
Time GetAckDuration (WifiTxVector ackTxVector) const
 Return the time required to transmit the ACK (including preamble and FCS). More...
 
Time GetAckDuration (Mac48Address to, WifiTxVector dataTxVector) const
 Return the time required to transmit the ACK to the specified address given the TXVECTOR of the DATA (including preamble and FCS). More...
 
uint32_t GetAckSize (void) const
 Return the total ACK size (including FCS trailer). More...
 
WifiTxVector GetAckTxVector (Mac48Address to, WifiMode dataTxMode) const
 Return a TXVECTOR for the ACK frame given the destination and the mode of the DATA used by the sender. More...
 
WifiTxVector GetAckTxVectorForData (Mac48Address to, WifiMode dataTxMode) const
 Return a TXVECTOR for the Block ACK frame given the destination and the mode of the DATA used by the sender. More...
 
Time GetBlockAckDuration (Mac48Address to, WifiTxVector blockAckReqTxVector, enum BlockAckType type) const
 
uint32_t GetBlockAckSize (enum BlockAckType type) const
 Return the total Block ACK size (including FCS trailer). More...
 
WifiTxVector GetBlockAckTxVector (Mac48Address to, WifiMode dataTxMode) const
 Return a TXVECTOR for the Block ACK frame given the destination and the mode of the DATA used by the sender. More...
 
Time GetCtsDuration (WifiTxVector ctsTxVector) const
 Return the time required to transmit the CTS (including preamble and FCS). More...
 
Time GetCtsDuration (Mac48Address to, WifiTxVector rtsTxVector) const
 Return the time required to transmit the CTS to the specified address given the TXVECTOR of the RTS (including preamble and FCS). More...
 
uint32_t GetCtsSize (void) const
 Return the total CTS size (including FCS trailer). More...
 
WifiTxVector GetCtsToSelfTxVector (Ptr< const Packet > packet, const WifiMacHeader *hdr) const
 Return a TXVECTOR for the CTS-to-self frame. More...
 
WifiTxVector GetCtsTxVector (Mac48Address to, WifiMode rtsTxMode) const
 Return a TXVECTOR for the CTS frame given the destination and the mode of the RTS used by the sender. More...
 
WifiTxVector GetCtsTxVectorForRts (Mac48Address to, WifiMode rtsTxMode) const
 Return a TXVECTOR for the CTS frame given the destination and the mode of the RTS used by the sender. More...
 
uint32_t GetRtsSize (void) const
 Return the total RTS size (including FCS trailer). More...
 
WifiTxVector GetRtsTxVector (Ptr< const Packet > packet, const WifiMacHeader *hdr) const
 Return a TXVECTOR for the RTS frame given the destination. More...
 
uint32_t GetSize (Ptr< const Packet > packet, const WifiMacHeader *hdr) const
 Return the total size of the packet after WifiMacHeader and FCS trailer have been added. More...
 
bool IsNavZero (void) const
 Check if NAV is zero. More...
 
void NavCounterResetCtsMissed (Time rtsEndRxTime)
 Reset NAV after CTS was missed when the NAV was setted with RTS. More...
 
bool NeedCtsToSelf (void)
 Check if CTS-to-self mechanism should be used for the current packet. More...
 
void NormalAckTimeout (void)
 Event handler when normal ACK timeout occurs. More...
 
void NotifyAckTimeoutResetNow ()
 Notify DcfManager (via DcfListener) that ACK timer should be resetted. More...
 
void NotifyAckTimeoutStartNow (Time duration)
 Notify DcfManager (via DcfListener) that ACK timer should be started for the given duration. More...
 
void NotifyCtsTimeoutResetNow ()
 Notify DcfManager (via DcfListener) that CTS timer should be resetted. More...
 
void NotifyCtsTimeoutStartNow (Time duration)
 Notify DcfManager (via DcfListener) that CTS timer should be started for the given duration. More...
 
void NotifyNav (Ptr< const Packet > packet, const WifiMacHeader &hdr, WifiMode txMode, WifiPreamble preamble)
 
void ResetBlockAckInactivityTimerIfNeeded (BlockAckAgreement &agreement)
 Every time that a block ack request or a packet with ack policy equals to block ack are received, if a relative block ack agreement exists and the value of inactivity timeout is not 0, the timer is reset. More...
 
void RxCompleteBufferedPacketsUntilFirstLost (Mac48Address originator, uint8_t tid)
 
void RxCompleteBufferedPacketsWithSmallerSequence (uint16_t seq, Mac48Address originator, uint8_t tid)
 
void SendAckAfterData (Mac48Address source, Time duration, WifiMode dataTxMode, double dataSnr)
 Send ACK after receiving DATA. More...
 
void SendBlockAckAfterBlockAckRequest (const CtrlBAckRequestHeader reqHdr, Mac48Address originator, Time duration, WifiMode blockAckReqTxMode)
 Invoked after that a block ack request has been received. More...
 
void SendBlockAckResponse (const CtrlBAckResponseHeader *blockAck, Mac48Address originator, bool immediate, Time duration, WifiMode blockAckReqTxMode)
 This method creates block ack frame with header equals to blockAck and start its transmission. More...
 
void SendCtsAfterRts (Mac48Address source, Time duration, WifiMode txMode, double rtsSnr)
 Send CTS after receiving RTS. More...
 
void SendCtsToSelf (void)
 Send CTS for a CTS-to-self mechanism. More...
 
void SendDataAfterCts (Mac48Address source, Time duration, WifiMode txMode)
 Send DATA after receiving CTS. More...
 
void SendDataPacket (void)
 Send DATA packet, which can be DATA-ACK or RTS-CTS-DATA-ACK transaction. More...
 
void SendRtsForPacket (void)
 Send RTS to begin RTS-CTS-DATA-ACK transaction. More...
 
void SetupPhyMacLowListener (Ptr< WifiPhy > phy)
 Set up WifiPhy listener for this MacLow. More...
 
void StartDataTxTimers (WifiTxVector dataTxVector)
 Start a DATA timer by scheduling appropriate ACK timeout. More...
 
bool StoreMpduIfNeeded (Ptr< Packet > packet, WifiMacHeader hdr)
 
void SuperFastAckTimeout (void)
 Event handler when super fast ACK timeout occurs. More...
 
void WaitSifsAfterEndTx (void)
 Event handler that is usually scheduled to fired at the appropriate time after completing transmissions. More...
 

Private Attributes

Time m_ackTimeout
 ACK timeout duration. More...
 
Agreements m_bAckAgreements
 
BlockAckCaches m_bAckCaches
 
Time m_basicBlockAckTimeout
 Basic block ACK timeout duration. More...
 
EventId m_blockAckTimeoutEvent
 Block ACK timeout event. More...
 
Mac48Address m_bssid
 BSSID address (Mac48Address) More...
 
Time m_compressedBlockAckTimeout
 Compressed block ACK timeout duration. More...
 
Time m_ctsTimeout
 CTS timeout duration. More...
 
EventId m_ctsTimeoutEvent
 CTS timeout event. More...
 
bool m_ctsToSelfSupported
 
WifiMacHeader m_currentHdr
 Header of the current packet. More...
 
Ptr< Packetm_currentPacket
 Current packet transmitted/to be transmitted. More...
 
DcfListeners m_dcfListeners
 List of MacLowDcfListener (pass events to Dcf) More...
 
QueueListeners m_edcaListeners
 
EventId m_endTxNoAckEvent
 Event for finishing transmission that does not require ACK. More...
 
EventId m_fastAckFailedTimeoutEvent
 Fast ACK failed timeout event. More...
 
EventId m_fastAckTimeoutEvent
 Fast ACK timeout event. More...
 
Time m_lastNavDuration
 The duration of the latest NAV. More...
 
Time m_lastNavStart
 The time when the latest NAV started. More...
 
MacLowTransmissionListenerm_listener
 Transmission listener for the current packet. More...
 
EventId m_navCounterResetCtsMissed
 Event to reset NAV when CTS is not received. More...
 
EventId m_normalAckTimeoutEvent
 Normal ACK timeout event. More...
 
Ptr< WifiPhym_phy
 Pointer to WifiPhy (actually send/receives frames) More...
 
class PhyMacLowListenerm_phyMacLowListener
 Listerner needed to monitor when a channel switching occurs. More...
 
Time m_pifs
 PCF Interframe Space (PIFS) duration. More...
 
bool m_promisc
 Flag if the device is operating in promiscuous mode. More...
 
Time m_rifs
 Reduced Interframe Space (RIFS) duration. More...
 
MacLowRxCallback m_rxCallback
 Callback to pass packet up. More...
 
Mac48Address m_self
 Address of this MacLow (Mac48Address) More...
 
EventId m_sendAckEvent
 Event to send ACK. More...
 
EventId m_sendCtsEvent
 Event to send CTS. More...
 
EventId m_sendDataEvent
 Event to send DATA. More...
 
Time m_sifs
 Short Interframe Space (SIFS) duration. More...
 
Time m_slotTime
 Slot duration. More...
 
Ptr< WifiRemoteStationManagerm_stationManager
 Pointer to WifiRemoteStationManager (rate control) More...
 
EventId m_superFastAckTimeoutEvent
 Super fast ACK timeout event. More...
 
MacLowTransmissionParameters m_txParams
 Transmission parameters of the current packet. More...
 
EventId m_waitRifsEvent
 Wait for RIFS event. More...
 
EventId m_waitSifsEvent
 Wait for SIFS event. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from ns3::Object
static TypeId GetTypeId (void)
 Register this type. More...
 
- Static Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
static void Cleanup (void)
 Noop. More...
 
- Static Public Member Functions inherited from ns3::ObjectBase
static TypeId GetTypeId (void)
 Get the type ID. More...
 

Detailed Description

handle RTS/CTS/DATA/ACK transactions.

Definition at line 411 of file mac-low.h.

Member Typedef Documentation

typedef std::pair<Mac48Address, uint8_t> ns3::MacLow::AgreementKey
private

Definition at line 1125 of file mac-low.h.

Definition at line 1128 of file mac-low.h.

typedef std::map<AgreementKey, AgreementValue>::iterator ns3::MacLow::AgreementsI
private

Definition at line 1129 of file mac-low.h.

Definition at line 1126 of file mac-low.h.

Definition at line 1131 of file mac-low.h.

typedef std::map<AgreementKey, BlockAckCache>::iterator ns3::MacLow::BlockAckCachesI
private

Definition at line 1132 of file mac-low.h.

typedef std::pair<Ptr<Packet>, WifiMacHeader> ns3::MacLow::BufferedPacket
private

Definition at line 1122 of file mac-low.h.

Definition at line 1123 of file mac-low.h.

typedef std::vector<MacLowDcfListener *> ns3::MacLow::DcfListeners
private

typedef for a list of MacLowDcfListener.

Definition at line 1080 of file mac-low.h.

typedef std::vector<MacLowDcfListener *>::const_iterator ns3::MacLow::DcfListenersCI
private

typedef for an iterator for a list of MacLowDcfListener.

Definition at line 1076 of file mac-low.h.

typedef for a callback for MacLowRx

Definition at line 417 of file mac-low.h.

Definition at line 1137 of file mac-low.h.

Constructor & Destructor Documentation

ns3::MacLow::MacLow ( )

Definition at line 288 of file mac-low.cc.

References m_lastNavDuration, m_lastNavStart, m_promisc, and NS_LOG_FUNCTION.

ns3::MacLow::~MacLow ( )
virtual

Definition at line 311 of file mac-low.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

void ns3::MacLow::BlockAckTimeout ( void  )
private

Event handler when block ACK timeout occurs.

Definition at line 1300 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), m_currentHdr, m_listener, m_stationManager, ns3::MacLowTransmissionListener::MissedBlockAck(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by StartDataTxTimers().

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Time ns3::MacLow::CalculateTransmissionTime ( Ptr< const Packet packet,
const WifiMacHeader hdr,
const MacLowTransmissionParameters parameters 
) const
Parameters
packetto send (does not include the 802.11 MAC header and checksum)
hdrheader associated to the packet to send.
parameterstransmission parameters of packet.
Returns
the transmission time that includes the time for the next packet transmission

This transmission time includes the time required for the next packet transmission if one was selected.

Definition at line 1108 of file mac-low.cc.

References CalculateOverallTxTime(), ns3::WifiPhy::CalculateTxDuration(), ns3::WifiMacHeader::GetAddr1(), GetDataTxVector(), ns3::WifiPhy::GetGreenfield(), ns3::WifiTxVector::GetMode(), ns3::WifiMode::GetModulationClass(), ns3::MacLowTransmissionParameters::GetNextPacketSize(), GetSifs(), ns3::MacLowTransmissionParameters::HasNextPacket(), m_currentHdr, m_phy, m_stationManager, ns3::WIFI_MOD_CLASS_HT, ns3::WIFI_PREAMBLE_HT_GF, ns3::WIFI_PREAMBLE_HT_MF, and ns3::WIFI_PREAMBLE_LONG.

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void ns3::MacLow::CancelAllEvents ( void  )
private

Cancel all scheduled events.

Called before beginning a transmission or switching channel.

Definition at line 350 of file mac-low.cc.

References ns3::EventId::Cancel(), ns3::MacLowTransmissionListener::Cancel(), ns3::EventId::IsRunning(), m_blockAckTimeoutEvent, m_ctsTimeoutEvent, m_endTxNoAckEvent, m_fastAckFailedTimeoutEvent, m_fastAckTimeoutEvent, m_listener, m_normalAckTimeoutEvent, m_sendAckEvent, m_sendCtsEvent, m_sendDataEvent, m_superFastAckTimeoutEvent, m_waitRifsEvent, m_waitSifsEvent, and NS_LOG_FUNCTION.

Referenced by NotifySwitchingStartNow(), and StartTransmission().

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void ns3::MacLow::CreateBlockAckAgreement ( const MgtAddBaResponseHeader respHdr,
Mac48Address  originator,
uint16_t  startingSeq 
)
Parameters
respHdrAdd block ack response from originator (action frame).
originatorAddress of peer station involved in block ack mechanism.
startingSeqSequence number of the first MPDU of all packets for which block ack was negotiated.

This function is typically invoked only by ns3::RegularWifiMac when the STA (which may be non-AP in ESS, or in an IBSS) has received an ADDBA Request frame and is transmitting an ADDBA Response frame. At this point MacLow must allocate buffers to collect all correctly received packets belonging to the category for which Block Ack was negotiated.

Definition at line 1785 of file mac-low.cc.

References ns3::MacLowBlockAckEventListener::BlockAckInactivityTimeout(), ns3::MgtAddBaResponseHeader::GetBufferSize(), ns3::BlockAckAgreement::GetTid(), ns3::MgtAddBaResponseHeader::GetTid(), ns3::BlockAckAgreement::GetTimeout(), ns3::MgtAddBaResponseHeader::GetTimeout(), ns3::BlockAckCache::Init(), ns3::MgtAddBaResponseHeader::IsAmsduSupported(), ns3::MgtAddBaResponseHeader::IsImmediateBlockAck(), m_bAckAgreements, m_bAckCaches, m_edcaListeners, ns3::QosUtilsMapTidToAc(), ns3::Simulator::Schedule(), ns3::BlockAckAgreement::SetAmsduSupport(), ns3::BlockAckAgreement::SetBufferSize(), ns3::BlockAckAgreement::SetDelayedBlockAck(), ns3::BlockAckAgreement::SetImmediateBlockAck(), ns3::BlockAckAgreement::SetStartingSequence(), ns3::BlockAckAgreement::SetTimeout(), and timeout.

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void ns3::MacLow::CtsTimeout ( void  )
private

Event handler when CTS timeout occurs.

Todo:
should check that there was no rx start before now. we should restart a new cts timeout now until the expected end of rx if there was a rx start before now.

Definition at line 1256 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), m_currentHdr, m_currentPacket, m_listener, m_stationManager, ns3::MacLowTransmissionListener::MissedCts(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by SendRtsForPacket().

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void ns3::MacLow::DestroyBlockAckAgreement ( Mac48Address  originator,
uint8_t  tid 
)
Parameters
originatorAddress of peer participating in Block Ack mechanism.
tidTID for which Block Ack was created.

Checks if exists an established block ack agreement with originator for tid tid. If the agreement exists, tears down it. This function is typically invoked when a DELBA frame is received from originator.

Definition at line 1827 of file mac-low.cc.

References m_bAckAgreements, m_bAckCaches, NS_ASSERT, RxCompleteBufferedPacketsUntilFirstLost(), and RxCompleteBufferedPacketsWithSmallerSequence().

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void ns3::MacLow::DoDispose ( void  )
privatevirtual

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 325 of file mac-low.cc.

References ns3::EventId::Cancel(), m_blockAckTimeoutEvent, m_ctsTimeoutEvent, m_endTxNoAckEvent, m_fastAckFailedTimeoutEvent, m_fastAckTimeoutEvent, m_normalAckTimeoutEvent, m_phy, m_phyMacLowListener, m_sendAckEvent, m_sendCtsEvent, m_sendDataEvent, m_stationManager, m_superFastAckTimeoutEvent, m_waitRifsEvent, m_waitSifsEvent, and NS_LOG_FUNCTION.

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void ns3::MacLow::DoNavResetNow ( Time  duration)
private

Reset NAV with the given duration.

Parameters
duration

Definition at line 1182 of file mac-low.cc.

References m_dcfListeners, m_lastNavStart, and ns3::Simulator::Now().

Referenced by NavCounterResetCtsMissed(), and NotifyNav().

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bool ns3::MacLow::DoNavStartNow ( Time  duration)
private

Start NAV with the given duration.

Parameters
duration
Returns
true if NAV is resetted

Definition at line 1192 of file mac-low.cc.

References m_dcfListeners, m_lastNavDuration, m_lastNavStart, and ns3::Simulator::Now().

Referenced by NotifyNav().

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void ns3::MacLow::EndTxNoAck ( void  )
private

A transmission that does not require an ACK has completed.

Definition at line 1698 of file mac-low.cc.

References ns3::MacLowTransmissionListener::EndTxNoAck(), and m_listener.

Referenced by StartDataTxTimers().

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void ns3::MacLow::FastAckFailedTimeout ( void  )
private

Event handler when fast ACK timeout occurs (busy).

Definition at line 1706 of file mac-low.cc.

References m_listener, ns3::MacLowTransmissionListener::MissedAck(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by ReceiveError().

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void ns3::MacLow::FastAckTimeout ( void  )
private

Event handler when fast ACK timeout occurs (idle).

Definition at line 1283 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiPhy::IsStateIdle(), m_currentHdr, m_listener, m_phy, m_stationManager, ns3::MacLowTransmissionListener::MissedAck(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by StartDataTxTimers().

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void ns3::MacLow::ForwardDown ( Ptr< const Packet packet,
const WifiMacHeader hdr,
WifiTxVector  txVector,
WifiPreamble  preamble 
)
private

Forward the packet down to WifiPhy for transmission.

Parameters
packet
hdr
txVector
preamble

Definition at line 1242 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacHeader::GetDuration(), ns3::WifiTxVector::GetMode(), ns3::WifiMacHeader::GetSequenceControl(), ns3::Packet::GetSize(), ns3::WifiMacHeader::GetTypeString(), m_currentHdr, m_phy, NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::WifiPhy::SendPacket().

Referenced by SendAckAfterData(), SendBlockAckResponse(), SendCtsAfterRts(), SendCtsToSelf(), SendDataAfterCts(), SendDataPacket(), and SendRtsForPacket().

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Time ns3::MacLow::GetAckDuration ( WifiTxVector  ackTxVector) const
private

Return the time required to transmit the ACK (including preamble and FCS).

Parameters
ackTxVector
Returns
the time required to transmit the ACK (including preamble and FCS)

Definition at line 955 of file mac-low.cc.

References ns3::WifiPhy::CalculateTxDuration(), GetAckSize(), ns3::WifiTxVector::GetMode(), ns3::WifiMode::GetModulationClass(), m_phy, ns3::WIFI_MOD_CLASS_HT, ns3::WIFI_PREAMBLE_HT_MF, and ns3::WIFI_PREAMBLE_LONG.

Referenced by CalculateOverallTxTime(), GetAckDuration(), SendAckAfterData(), SendBlockAckResponse(), SendCtsToSelf(), SendDataAfterCts(), SendDataPacket(), and SendRtsForPacket().

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Time ns3::MacLow::GetAckDuration ( Mac48Address  to,
WifiTxVector  dataTxVector 
) const
private

Return the time required to transmit the ACK to the specified address given the TXVECTOR of the DATA (including preamble and FCS).

Parameters
to
dataTxVector
Returns
the time required to transmit the ACK (including preamble and FCS)

Definition at line 949 of file mac-low.cc.

References GetAckDuration(), GetAckTxVectorForData(), and ns3::WifiTxVector::GetMode().

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uint32_t ns3::MacLow::GetAckSize ( void  ) const
private

Return the total ACK size (including FCS trailer).

Returns
the total ACK size

Definition at line 914 of file mac-low.cc.

References ns3::WifiMacHeader::GetSize(), ns3::WifiMacHeader::SetType(), and ns3::WIFI_MAC_CTL_ACK.

Referenced by GetAckDuration().

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Time ns3::MacLow::GetAckTimeout ( void  ) const

Return ACK timeout of this MacLow.

Returns
ACK timeout

Definition at line 506 of file mac-low.cc.

References m_ackTimeout.

Referenced by StartDataTxTimers().

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WifiTxVector ns3::MacLow::GetAckTxVector ( Mac48Address  to,
WifiMode  dataTxMode 
) const
private

Return a TXVECTOR for the ACK frame given the destination and the mode of the DATA used by the sender.

The function consults WifiRemoteStationManager, which controls the rate to different destinations.

Parameters
tothe MAC address of the ACK receiver
dataTxModethe mode of the DATA used by the sender
Returns
TXVECTOR for the ACK

Definition at line 1040 of file mac-low.cc.

References m_stationManager.

Referenced by GetAckTxVectorForData(), and SendAckAfterData().

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WifiTxVector ns3::MacLow::GetAckTxVectorForData ( Mac48Address  to,
WifiMode  dataTxMode 
) const
private

Return a TXVECTOR for the Block ACK frame given the destination and the mode of the DATA used by the sender.

The function consults WifiRemoteStationManager, which controls the rate to different destinations.

Parameters
tothe MAC address of the Block ACK receiver
dataTxModethe mode of the DATA used by the sender
Returns
TXVECTOR for the Block ACK

Definition at line 1056 of file mac-low.cc.

References GetAckTxVector().

Referenced by GetAckDuration().

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Mac48Address ns3::MacLow::GetAddress ( void  ) const

Return the MAC address of this MacLow.

Returns
Mac48Address of this MacLow

Definition at line 501 of file mac-low.cc.

References m_self.

Referenced by SendBlockAckResponse().

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Time ns3::MacLow::GetBasicBlockAckTimeout ( ) const

Return Basic Block ACK timeout of this MacLow.

Returns
Basic Block ACK timeout

Definition at line 511 of file mac-low.cc.

References m_basicBlockAckTimeout.

Referenced by StartDataTxTimers().

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Time ns3::MacLow::GetBlockAckDuration ( Mac48Address  to,
WifiTxVector  blockAckReqTxVector,
enum BlockAckType  type 
) const
private

Definition at line 965 of file mac-low.cc.

References ns3::WifiPhy::CalculateTxDuration(), GetBlockAckSize(), ns3::WifiTxVector::GetMode(), ns3::WifiMode::GetModulationClass(), m_phy, ns3::WIFI_MOD_CLASS_HT, ns3::WIFI_PREAMBLE_HT_MF, and ns3::WIFI_PREAMBLE_LONG.

Referenced by SendBlockAckResponse(), SendCtsToSelf(), and SendDataPacket().

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uint32_t ns3::MacLow::GetBlockAckSize ( enum BlockAckType  type) const
private

Return the total Block ACK size (including FCS trailer).

Parameters
typethe Block ACK type
Returns
the total Block ACK size

Definition at line 921 of file mac-low.cc.

References ns3::BASIC_BLOCK_ACK, ns3::COMPRESSED_BLOCK_ACK, ns3::CtrlBAckResponseHeader::GetSerializedSize(), ns3::WifiMacHeader::GetSize(), ns3::MULTI_TID_BLOCK_ACK, NS_ASSERT, ns3::WifiMacHeader::SetType(), ns3::CtrlBAckResponseHeader::SetType(), and ns3::WIFI_MAC_CTL_BACKRESP.

Referenced by GetBlockAckDuration().

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WifiTxVector ns3::MacLow::GetBlockAckTxVector ( Mac48Address  to,
WifiMode  dataTxMode 
) const
private

Return a TXVECTOR for the Block ACK frame given the destination and the mode of the DATA used by the sender.

The function consults WifiRemoteStationManager, which controls the rate to different destinations.

Parameters
tothe MAC address of the Block ACK receiver
dataTxModethe mode of the DATA used by the sender
Returns
TXVECTOR for the Block ACK

Definition at line 1045 of file mac-low.cc.

References m_stationManager.

Referenced by SendBlockAckResponse().

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Mac48Address ns3::MacLow::GetBssid ( void  ) const

Return the Basic Service Set Identification.

Returns
BSSID

Definition at line 546 of file mac-low.cc.

References m_bssid.

Time ns3::MacLow::GetCompressedBlockAckTimeout ( ) const

Return Compressed Block ACK timeout of this MacLow.

Returns
Compressed Block ACK timeout

Definition at line 516 of file mac-low.cc.

References m_compressedBlockAckTimeout.

Referenced by StartDataTxTimers().

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Time ns3::MacLow::GetCtsDuration ( WifiTxVector  ctsTxVector) const
private

Return the time required to transmit the CTS (including preamble and FCS).

Parameters
ctsTxVector
Returns
the time required to transmit the CTS (including preamble and FCS)

Definition at line 990 of file mac-low.cc.

References ns3::WifiPhy::CalculateTxDuration(), GetCtsSize(), ns3::WifiTxVector::GetMode(), ns3::WifiMode::GetModulationClass(), m_phy, ns3::WIFI_MOD_CLASS_HT, ns3::WIFI_PREAMBLE_HT_MF, and ns3::WIFI_PREAMBLE_LONG.

Referenced by CalculateOverallTxTime(), GetCtsDuration(), SendCtsAfterRts(), and SendRtsForPacket().

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Time ns3::MacLow::GetCtsDuration ( Mac48Address  to,
WifiTxVector  rtsTxVector 
) const
private

Return the time required to transmit the CTS to the specified address given the TXVECTOR of the RTS (including preamble and FCS).

Parameters
to
rtsTxVector
Returns
the time required to transmit the CTS (including preamble and FCS)

Definition at line 983 of file mac-low.cc.

References GetCtsDuration(), GetCtsTxVectorForRts(), and ns3::WifiTxVector::GetMode().

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uint32_t ns3::MacLow::GetCtsSize ( void  ) const
private

Return the total CTS size (including FCS trailer).

Returns
the total CTS size

Definition at line 1000 of file mac-low.cc.

References ns3::WifiMacHeader::GetSize(), ns3::WifiMacHeader::SetType(), and ns3::WIFI_MAC_CTL_CTS.

Referenced by GetCtsDuration(), and SendCtsToSelf().

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Time ns3::MacLow::GetCtsTimeout ( void  ) const

Return CTS timeout of this MacLow.

Returns
CTS timeout

Definition at line 521 of file mac-low.cc.

References m_ctsTimeout.

Referenced by SendRtsForPacket().

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bool ns3::MacLow::GetCtsToSelfSupported ( ) const

Return whether CTS-to-self capability is supported.

Returns
true if CTS-to-self is supported, false otherwise

Definition at line 461 of file mac-low.cc.

References m_ctsToSelfSupported.

WifiTxVector ns3::MacLow::GetCtsToSelfTxVector ( Ptr< const Packet packet,
const WifiMacHeader hdr 
) const
private

Return a TXVECTOR for the CTS-to-self frame.

The function consults WifiRemoteStationManager, which controls the rate to different destinations.

Parameters
packetthe packet that requires CTS-to-self
hdrthe Wifi header of the packet
Returns
TXVECTOR for the CTS-to-self operation

Definition at line 1014 of file mac-low.cc.

References m_stationManager.

Referenced by SendCtsToSelf().

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WifiTxVector ns3::MacLow::GetCtsTxVector ( Mac48Address  to,
WifiMode  rtsTxMode 
) const
private

Return a TXVECTOR for the CTS frame given the destination and the mode of the RTS used by the sender.

The function consults WifiRemoteStationManager, which controls the rate to different destinations.

Parameters
tothe MAC address of the CTS receiver
rtsTxModethe mode of the RTS used by the sender
Returns
TXVECTOR for the CTS

Definition at line 1035 of file mac-low.cc.

References m_stationManager.

Referenced by GetCtsTxVectorForRts(), and SendCtsAfterRts().

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WifiTxVector ns3::MacLow::GetCtsTxVectorForRts ( Mac48Address  to,
WifiMode  rtsTxMode 
) const
private

Return a TXVECTOR for the CTS frame given the destination and the mode of the RTS used by the sender.

The function consults WifiRemoteStationManager, which controls the rate to different destinations.

Parameters
tothe MAC address of the CTS receiver
rtsTxModethe mode of the RTS used by the sender
Returns
TXVECTOR for the CTS

Definition at line 1051 of file mac-low.cc.

References GetCtsTxVector().

Referenced by GetCtsDuration().

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WifiTxVector ns3::MacLow::GetDataTxVector ( Ptr< const Packet packet,
const WifiMacHeader hdr 
) const
protectedvirtual

Return a TXVECTOR for the DATA frame given the destination.

The function consults WifiRemoteStationManager, which controls the rate to different destinations.

Parameters
packetthe packet being asked for TXVECTOR
hdrthe WifiMacHeader
Returns
TXVECTOR for the given packet

Reimplemented in ns3::WaveMacLow.

Definition at line 1026 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacTrailer::GetSerializedSize(), ns3::Packet::GetSize(), ns3::WifiMacHeader::GetSize(), and m_stationManager.

Referenced by CalculateOverallTxTime(), CalculateTransmissionTime(), ns3::WaveMacLow::GetDataTxVector(), NeedCtsToSelf(), SendCtsToSelf(), SendDataAfterCts(), SendDataPacket(), and SendRtsForPacket().

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Time ns3::MacLow::GetPifs ( void  ) const

Return PCF Interframe Space (PIFS) of this MacLow.

Returns
PIFS

Definition at line 541 of file mac-low.cc.

References m_pifs.

Referenced by StartDataTxTimers().

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Time ns3::MacLow::GetRifs ( void  ) const

Return Reduced Interframe Space (RIFS) of this MacLow.

Returns
RIFS

Definition at line 531 of file mac-low.cc.

References m_rifs.

Referenced by StartDataTxTimers().

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uint32_t ns3::MacLow::GetRtsSize ( void  ) const
private

Return the total RTS size (including FCS trailer).

Returns
the total RTS size

Definition at line 942 of file mac-low.cc.

References ns3::WifiMacHeader::GetSize(), ns3::WifiMacHeader::SetType(), and ns3::WIFI_MAC_CTL_RTS.

Referenced by CalculateOverallTxTime(), and SendRtsForPacket().

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WifiTxVector ns3::MacLow::GetRtsTxVector ( Ptr< const Packet packet,
const WifiMacHeader hdr 
) const
private

Return a TXVECTOR for the RTS frame given the destination.

The function consults WifiRemoteStationManager, which controls the rate to different destinations.

Parameters
packetthe packet being asked for RTS TXVECTOR
hdrthe WifiMacHeader
Returns
TXVECTOR for the RTS of the given packet

Definition at line 1020 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), and m_stationManager.

Referenced by CalculateOverallTxTime(), NotifyNav(), and SendRtsForPacket().

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Time ns3::MacLow::GetSifs ( void  ) const

Return Short Interframe Space (SIFS) of this MacLow.

Returns
SIFS

Definition at line 526 of file mac-low.cc.

References m_sifs.

Referenced by CalculateOverallTxTime(), CalculateTransmissionTime(), NotifyNav(), ReceiveError(), ReceiveOk(), SendAckAfterData(), SendBlockAckResponse(), SendCtsAfterRts(), SendCtsToSelf(), SendDataAfterCts(), SendDataPacket(), SendRtsForPacket(), and StartDataTxTimers().

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uint32_t ns3::MacLow::GetSize ( Ptr< const Packet packet,
const WifiMacHeader hdr 
) const
private

Return the total size of the packet after WifiMacHeader and FCS trailer have been added.

Parameters
packetthe packet to be encapsulated with WifiMacHeader and FCS trailer
hdrthe WifiMacHeader
Returns
the total packet size

Definition at line 1007 of file mac-low.cc.

References ns3::WifiMacTrailer::GetSerializedSize(), ns3::Packet::GetSize(), and ns3::WifiMacHeader::GetSize().

Referenced by CalculateOverallTxTime(), SendCtsToSelf(), SendDataAfterCts(), SendRtsForPacket(), StartDataTxTimers(), and StartTransmission().

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Time ns3::MacLow::GetSlotTime ( void  ) const

Return slot duration of this MacLow.

Returns
slot duration

Definition at line 536 of file mac-low.cc.

References m_slotTime.

Referenced by NotifyNav().

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bool ns3::MacLow::IsNavZero ( void  ) const
private

Check if NAV is zero.

Returns
true if NAV is zero, false otherwise

Definition at line 1519 of file mac-low.cc.

References m_lastNavDuration, m_lastNavStart, and ns3::Simulator::Now().

Referenced by ReceiveOk().

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bool ns3::MacLow::IsPromisc ( void  ) const

Check if MacLow is operating in promiscuous mode.

Returns
true if MacLow is operating in promiscuous mode, false otherwise

Definition at line 551 of file mac-low.cc.

References m_promisc.

void ns3::MacLow::NavCounterResetCtsMissed ( Time  rtsEndRxTime)
private

Reset NAV after CTS was missed when the NAV was setted with RTS.

Parameters
rtsEndRxTime

Definition at line 1173 of file mac-low.cc.

References DoNavResetNow(), ns3::WifiPhy::GetLastRxStartTime(), and m_phy.

Referenced by NotifyNav().

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bool ns3::MacLow::NeedCtsToSelf ( void  )
private

Check if CTS-to-self mechanism should be used for the current packet.

Returns
true if CTS-to-self mechanism should be used for the current packet, false otherwise

Definition at line 620 of file mac-low.cc.

References GetDataTxVector(), m_currentHdr, m_currentPacket, and m_stationManager.

Referenced by StartTransmission().

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void ns3::MacLow::NormalAckTimeout ( void  )
private

Event handler when normal ACK timeout occurs.

Todo:
should check that there was no rx start before now. we should restart a new ack timeout now until the expected end of rx if there was a rx start before now.

Definition at line 1270 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), m_currentHdr, m_listener, m_stationManager, ns3::MacLowTransmissionListener::MissedAck(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by StartDataTxTimers().

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void ns3::MacLow::NotifyAckTimeoutResetNow ( )
private

Notify DcfManager (via DcfListener) that ACK timer should be resetted.

Definition at line 1217 of file mac-low.cc.

References m_dcfListeners.

Referenced by ReceiveOk().

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void ns3::MacLow::NotifyAckTimeoutStartNow ( Time  duration)
private

Notify DcfManager (via DcfListener) that ACK timer should be started for the given duration.

Parameters
duration

Definition at line 1209 of file mac-low.cc.

References m_dcfListeners.

Referenced by StartDataTxTimers().

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void ns3::MacLow::NotifyCtsTimeoutResetNow ( )
private

Notify DcfManager (via DcfListener) that CTS timer should be resetted.

Definition at line 1233 of file mac-low.cc.

References m_dcfListeners.

Referenced by ReceiveOk().

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void ns3::MacLow::NotifyCtsTimeoutStartNow ( Time  duration)
private

Notify DcfManager (via DcfListener) that CTS timer should be started for the given duration.

Parameters
duration

Definition at line 1225 of file mac-low.cc.

References m_dcfListeners.

Referenced by SendRtsForPacket().

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void ns3::MacLow::NotifyNav ( Ptr< const Packet packet,
const WifiMacHeader hdr,
WifiMode  txMode,
WifiPreamble  preamble 
)
private
Todo:
We should also handle CF_END specially here but we don't for now because we do not generate them.

A STA that used information from an RTS frame as the most recent basis to update its NAV setting is permitted to reset its NAV if no PHY-RXSTART.indication is detected from the PHY during a period with a duration of (2 * aSIFSTime) + (CTS_Time) + (2 * aSlotTime) starting at the PHY-RXEND.indication corresponding to the detection of the RTS frame. The “CTS_Time” shall be calculated using the length of the CTS frame and the data rate at which the RTS frame used for the most recent NAV update was received.

Definition at line 1131 of file mac-low.cc.

References ns3::WifiPhy::CalculateTxDuration(), DoNavResetNow(), DoNavStartNow(), ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacHeader::GetAddr2(), ns3::WifiMacHeader::GetDuration(), GetRtsTxVector(), ns3::WifiMacHeader::GetSerializedSize(), GetSifs(), GetSlotTime(), ns3::WifiMacHeader::IsCfpoll(), ns3::WifiMacHeader::IsRts(), m_bssid, m_lastNavStart, m_navCounterResetCtsMissed, m_phy, m_self, NavCounterResetCtsMissed(), ns3::Simulator::Now(), NS_ASSERT, ns3::Simulator::Schedule(), ns3::WifiMacHeader::SetType(), and ns3::WIFI_MAC_CTL_CTS.

Referenced by ReceiveOk().

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void ns3::MacLow::NotifySwitchingStartNow ( Time  duration)
Parameters
durationswitching delay duration.

This method is typically invoked by the PhyMacLowListener to notify the MAC layer that a channel switching occured. When a channel switching occurs, pending MAC transmissions (RTS, CTS, DATA and ACK) are cancelled.

Definition at line 640 of file mac-low.cc.

References ns3::EventId::Cancel(), CancelAllEvents(), ns3::EventId::IsRunning(), m_currentPacket, m_lastNavDuration, m_lastNavStart, m_listener, m_navCounterResetCtsMissed, m_stationManager, ns3::Simulator::Now(), and NS_LOG_DEBUG.

Referenced by ns3::PhyMacLowListener::NotifySwitchingStart().

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void ns3::MacLow::ReceiveError ( Ptr< const Packet packet,
double  rxSnr 
)
Parameters
packetpacket received.
rxSnrsnr of packet received.

This method is typically invoked by the lower PHY layer to notify the MAC layer that a packet was unsuccessfully received.

Definition at line 626 of file mac-low.cc.

References FastAckFailedTimeout(), GetSifs(), ns3::EventId::IsExpired(), m_fastAckFailedTimeoutEvent, m_txParams, ns3::MacLowTransmissionParameters::MustWaitFastAck(), NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::Simulator::Schedule().

Referenced by SetPhy().

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void ns3::MacLow::ReceiveOk ( Ptr< Packet packet,
double  rxSnr,
WifiMode  txMode,
WifiPreamble  preamble 
)
Parameters
packetpacket received
rxSnrsnr of packet received
txModetransmission mode of packet received
preambletype of preamble used for the packet received

This method is typically invoked by the lower PHY layer to notify the MAC layer that a packet was successfully received.

Definition at line 656 of file mac-low.cc.

References ns3::EventId::Cancel(), ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacHeader::GetAddr2(), ns3::WifiMacHeader::GetDuration(), ns3::WifiMacHeader::GetQosTid(), GetSifs(), ns3::CtrlBAckRequestHeader::GetStartingSequence(), ns3::CtrlBAckRequestHeader::GetTidInfo(), ns3::WifiMacHeader::GetTypeString(), ns3::MacLowTransmissionListener::GotAck(), ns3::MacLowTransmissionListener::GotBlockAck(), ns3::MacLowTransmissionListener::GotCts(), ns3::MacLowTransmissionParameters::HasNextPacket(), ns3::WifiMacHeader::IsAck(), ns3::WifiMacHeader::IsBlockAck(), ns3::WifiMacHeader::IsBlockAckReq(), ns3::WifiMacHeader::IsCtl(), ns3::WifiMacHeader::IsCts(), ns3::WifiMacHeader::IsData(), ns3::EventId::IsExpired(), ns3::Mac48Address::IsGroup(), ns3::WifiMacHeader::IsMgt(), ns3::CtrlBAckRequestHeader::IsMultiTid(), IsNavZero(), ns3::WifiMacHeader::IsQosAck(), ns3::WifiMacHeader::IsQosBlockAck(), ns3::WifiMacHeader::IsQosData(), ns3::WifiMacHeader::IsQosNoAck(), ns3::WifiMacHeader::IsRts(), ns3::EventId::IsRunning(), m_bAckAgreements, m_bAckCaches, m_blockAckTimeoutEvent, m_ctsTimeoutEvent, m_currentHdr, m_currentPacket, m_edcaListeners, m_fastAckTimeoutEvent, m_listener, m_normalAckTimeoutEvent, m_promisc, m_rxCallback, m_self, m_sendAckEvent, m_sendCtsEvent, m_sendDataEvent, m_stationManager, m_superFastAckTimeoutEvent, m_txParams, m_waitSifsEvent, ns3::MacLowTransmissionParameters::MustWaitAck(), ns3::MacLowTransmissionParameters::MustWaitBasicBlockAck(), ns3::MacLowTransmissionParameters::MustWaitCompressedBlockAck(), ns3::MacLowTransmissionParameters::MustWaitFastAck(), ns3::MacLowTransmissionParameters::MustWaitNormalAck(), NotifyAckTimeoutResetNow(), NotifyCtsTimeoutResetNow(), NotifyNav(), NS_ASSERT, NS_FATAL_ERROR, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::QosUtilsMapTidToAc(), ns3::Packet::RemoveHeader(), ns3::Packet::RemovePacketTag(), ns3::Packet::RemoveTrailer(), ResetBlockAckInactivityTimerIfNeeded(), RxCompleteBufferedPacketsUntilFirstLost(), RxCompleteBufferedPacketsWithSmallerSequence(), ns3::Simulator::Schedule(), SendAckAfterData(), SendBlockAckAfterBlockAckRequest(), SendCtsAfterRts(), SendDataAfterCts(), StoreMpduIfNeeded(), and WaitSifsAfterEndTx().

Referenced by SetPhy().

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void ns3::MacLow::RegisterBlockAckListenerForAc ( enum AcIndex  ac,
MacLowBlockAckEventListener listener 
)
Parameters
acAccess class managed by the queue.
listenerThe listener for the queue.

The lifetime of the registered listener is typically equal to the lifetime of the queue associated to this AC.

Definition at line 2074 of file mac-low.cc.

References m_edcaListeners.

void ns3::MacLow::RegisterDcfListener ( MacLowDcfListener listener)
Parameters
listenerlisten to NAV events for every incoming and outgoing packet.

Definition at line 562 of file mac-low.cc.

References m_dcfListeners.

void ns3::MacLow::ResetBlockAckInactivityTimerIfNeeded ( BlockAckAgreement agreement)
private

Every time that a block ack request or a packet with ack policy equals to block ack are received, if a relative block ack agreement exists and the value of inactivity timeout is not 0, the timer is reset.

see section 11.5.3 in IEEE802.11e for more details.

Parameters
agreement

Definition at line 2053 of file mac-low.cc.

References ns3::MacLowBlockAckEventListener::BlockAckInactivityTimeout(), ns3::EventId::Cancel(), ns3::BlockAckAgreement::GetPeer(), ns3::BlockAckAgreement::GetTid(), ns3::BlockAckAgreement::GetTimeout(), ns3::EventId::IsRunning(), m_edcaListeners, ns3::BlockAckAgreement::m_inactivityEvent, NS_ASSERT, ns3::QosUtilsMapTidToAc(), ns3::Simulator::Schedule(), and timeout.

Referenced by ReceiveOk().

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void ns3::MacLow::RxCompleteBufferedPacketsUntilFirstLost ( Mac48Address  originator,
uint8_t  tid 
)
private
Parameters
originatorAddress of peer participating in Block Ack mechanism.
tidTID for which Block Ack was created.

This method is typically invoked when a MPDU with ack policy subfield set to Normal Ack is received and a block ack agreement for that packet exists. This happens when the originator of block ack has only few MPDUs to send. All completed MSDUs starting with starting sequence number of block ack agreement are forward up to WifiMac until there is an incomplete or missing MSDU. See section 9.10.4 in IEEE802.11 standard for more details.

Definition at line 1903 of file mac-low.cc.

References m_bAckAgreements, and m_rxCallback.

Referenced by DestroyBlockAckAgreement(), ReceiveOk(), and SendBlockAckAfterBlockAckRequest().

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void ns3::MacLow::RxCompleteBufferedPacketsWithSmallerSequence ( uint16_t  seq,
Mac48Address  originator,
uint8_t  tid 
)
private
Parameters
originatorAddress of peer participating in Block Ack mechanism.
tidTID for which Block Ack was created.
seqStarting sequence

This function forward up all completed "old" packets with sequence number smaller than seq. All comparison are performed circularly mod 4096.

Definition at line 1843 of file mac-low.cc.

References m_bAckAgreements, m_rxCallback, and ns3::QosUtilsMapSeqControlToUniqueInteger().

Referenced by DestroyBlockAckAgreement(), ReceiveOk(), and SendBlockAckAfterBlockAckRequest().

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void ns3::MacLow::SendBlockAckAfterBlockAckRequest ( const CtrlBAckRequestHeader  reqHdr,
Mac48Address  originator,
Time  duration,
WifiMode  blockAckReqTxMode 
)
private

Invoked after that a block ack request has been received.

Looks for corresponding block ack agreement and creates block ack bitmap on a received packets basis.

Parameters
reqHdr
originator
duration
blockAckReqTxMode

Definition at line 2005 of file mac-low.cc.

References ns3::BASIC_BLOCK_ACK, ns3::COMPRESSED_BLOCK_ACK, ns3::CtrlBAckRequestHeader::GetStartingSequence(), ns3::CtrlBAckRequestHeader::GetTidInfo(), ns3::CtrlBAckRequestHeader::IsBasic(), ns3::CtrlBAckRequestHeader::IsCompressed(), ns3::CtrlBAckRequestHeader::IsMultiTid(), m_bAckAgreements, m_bAckCaches, NS_ASSERT, NS_FATAL_ERROR, NS_LOG_DEBUG, NS_LOG_FUNCTION, RxCompleteBufferedPacketsUntilFirstLost(), RxCompleteBufferedPacketsWithSmallerSequence(), SendBlockAckResponse(), ns3::CtrlBAckResponseHeader::SetStartingSequence(), ns3::CtrlBAckResponseHeader::SetTidInfo(), and ns3::CtrlBAckResponseHeader::SetType().

Referenced by ReceiveOk().

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void ns3::MacLow::SendBlockAckResponse ( const CtrlBAckResponseHeader blockAck,
Mac48Address  originator,
bool  immediate,
Time  duration,
WifiMode  blockAckReqTxMode 
)
private
void ns3::MacLow::SendCtsToSelf ( void  )
private
void ns3::MacLow::SetAckTimeout ( Time  ackTimeout)

Set ACK timeout of this MacLow.

Parameters
ackTimeoutACK timeout of this MacLow

Definition at line 441 of file mac-low.cc.

References m_ackTimeout.

void ns3::MacLow::SetAddress ( Mac48Address  ad)

Set MAC address of this MacLow.

Parameters
adMac48Address of this MacLow

Definition at line 436 of file mac-low.cc.

References m_self.

void ns3::MacLow::SetBasicBlockAckTimeout ( Time  blockAckTimeout)

Set Basic Block ACK timeout of this MacLow.

Parameters
blockAckTimeoutBasic Block ACK timeout of this MacLow

Definition at line 446 of file mac-low.cc.

References m_basicBlockAckTimeout.

void ns3::MacLow::SetBssid ( Mac48Address  ad)

Set the Basic Service Set Identification.

Parameters
adthe BSSID

Definition at line 491 of file mac-low.cc.

References m_bssid.

void ns3::MacLow::SetCompressedBlockAckTimeout ( Time  blockAckTimeout)

Set Compressed Block ACK timeout of this MacLow.

Parameters
blockAckTimeoutCompressed Block ACK timeout of this MacLow

Definition at line 451 of file mac-low.cc.

References m_compressedBlockAckTimeout.

void ns3::MacLow::SetCtsTimeout ( Time  ctsTimeout)

Set CTS timeout of this MacLow.

Parameters
ctsTimeoutCTS timeout of this MacLow

Definition at line 466 of file mac-low.cc.

References m_ctsTimeout.

void ns3::MacLow::SetCtsToSelfSupported ( bool  enable)

Enable or disable CTS-to-self capability.

Parameters
enableEnable or disable CTS-to-self capability

Definition at line 456 of file mac-low.cc.

References m_ctsToSelfSupported.

void ns3::MacLow::SetPhy ( Ptr< WifiPhy phy)

Set up WifiPhy associated with this MacLow.

Parameters
phyWifiPhy associated with this MacLow

Definition at line 422 of file mac-low.cc.

References m_phy, ns3::MakeCallback(), ReceiveError(), ReceiveOk(), ns3::WifiPhy::SetReceiveErrorCallback(), ns3::WifiPhy::SetReceiveOkCallback(), and SetupPhyMacLowListener().

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void ns3::MacLow::SetPifs ( Time  pifs)

Set PCF Interframe Space (PIFS) of this MacLow.

Parameters
pifsPIFS of this MacLow

Definition at line 481 of file mac-low.cc.

References m_pifs.

void ns3::MacLow::SetPromisc ( void  )

Enable promiscuous mode.

Definition at line 496 of file mac-low.cc.

References m_promisc.

void ns3::MacLow::SetRifs ( Time  rifs)

Set Reduced Interframe Space (RIFS) of this MacLow.

Parameters
rifsRIFS of this MacLow

Definition at line 486 of file mac-low.cc.

References m_rifs.

void ns3::MacLow::SetRxCallback ( Callback< void, Ptr< Packet >, const WifiMacHeader * >  callback)
Parameters
callbackthe callback which receives every incoming packet.

This callback typically forwards incoming packets to an instance of ns3::MacRxMiddle.

Definition at line 557 of file mac-low.cc.

References m_rxCallback.

void ns3::MacLow::SetSifs ( Time  sifs)

Set Short Interframe Space (SIFS) of this MacLow.

Parameters
sifsSIFS of this MacLow

Definition at line 471 of file mac-low.cc.

References m_sifs.

void ns3::MacLow::SetSlotTime ( Time  slotTime)

Set slot duration of this MacLow.

Parameters
slotTimeslot duration of this MacLow

Definition at line 476 of file mac-low.cc.

References m_slotTime.

void ns3::MacLow::SetupPhyMacLowListener ( Ptr< WifiPhy phy)
private

Set up WifiPhy listener for this MacLow.

Parameters
phythe WifiPhy this MacLow is connected to

Definition at line 317 of file mac-low.cc.

References m_phyMacLowListener, and ns3::WifiPhy::RegisterListener().

Referenced by SetPhy().

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void ns3::MacLow::SetWifiRemoteStationManager ( Ptr< WifiRemoteStationManager manager)

Set up WifiRemoteStationManager associated with this MacLow.

Parameters
managerWifiRemoteStationManager associated with this MacLow

Definition at line 430 of file mac-low.cc.

References m_stationManager.

void ns3::MacLow::StartDataTxTimers ( WifiTxVector  dataTxVector)
private
void ns3::MacLow::StartTransmission ( Ptr< const Packet packet,
const WifiMacHeader hdr,
MacLowTransmissionParameters  parameters,
MacLowTransmissionListener listener 
)
Parameters
packetpacket to send
hdr802.11 header for packet to send
parametersthe transmission parameters to use for this packet.
listenerlisten to transmission events.

Start the transmission of the input packet and notify the listener of transmission events.

Definition at line 569 of file mac-low.cc.

References CancelAllEvents(), ns3::Packet::Copy(), ns3::WifiMacHeader::GetAddr1(), GetSize(), ns3::WifiPhy::IsStateTx(), m_ctsToSelfSupported, m_currentHdr, m_currentPacket, m_listener, m_phy, m_txParams, ns3::MacLowTransmissionParameters::MustSendRts(), NeedCtsToSelf(), NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, SendCtsToSelf(), SendDataPacket(), and SendRtsForPacket().

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bool ns3::MacLow::StoreMpduIfNeeded ( Ptr< Packet packet,
WifiMacHeader  hdr 
)
private

Definition at line 1754 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr2(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::GetSequenceControl(), m_bAckAgreements, m_bAckCaches, NS_ASSERT, ns3::QosUtilsMapSeqControlToUniqueInteger(), and ns3::Packet::RemoveTrailer().

Referenced by ReceiveOk().

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void ns3::MacLow::SuperFastAckTimeout ( void  )
private

Event handler when super fast ACK timeout occurs.

Definition at line 1311 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::MacLowTransmissionListener::GotAck(), ns3::WifiPhy::IsStateIdle(), m_currentHdr, m_listener, m_phy, m_stationManager, ns3::MacLowTransmissionListener::MissedAck(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by StartDataTxTimers().

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void ns3::MacLow::WaitSifsAfterEndTx ( void  )
private

Event handler that is usually scheduled to fired at the appropriate time after completing transmissions.

Definition at line 1692 of file mac-low.cc.

References m_listener, and ns3::MacLowTransmissionListener::StartNext().

Referenced by ReceiveOk(), and StartDataTxTimers().

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Member Data Documentation

Time ns3::MacLow::m_ackTimeout
private

ACK timeout duration.

Definition at line 1103 of file mac-low.h.

Referenced by GetAckTimeout(), and SetAckTimeout().

Time ns3::MacLow::m_basicBlockAckTimeout
private

Basic block ACK timeout duration.

Definition at line 1104 of file mac-low.h.

Referenced by GetBasicBlockAckTimeout(), and SetBasicBlockAckTimeout().

EventId ns3::MacLow::m_blockAckTimeoutEvent
private

Block ACK timeout event.

Definition at line 1087 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), ReceiveOk(), and StartDataTxTimers().

Mac48Address ns3::MacLow::m_bssid
private

BSSID address (Mac48Address)

Definition at line 1102 of file mac-low.h.

Referenced by GetBssid(), NotifyNav(), and SetBssid().

Time ns3::MacLow::m_compressedBlockAckTimeout
private

Compressed block ACK timeout duration.

Definition at line 1105 of file mac-low.h.

Referenced by GetCompressedBlockAckTimeout(), and SetCompressedBlockAckTimeout().

Time ns3::MacLow::m_ctsTimeout
private

CTS timeout duration.

Definition at line 1106 of file mac-low.h.

Referenced by GetCtsTimeout(), and SetCtsTimeout().

EventId ns3::MacLow::m_ctsTimeoutEvent
private

CTS timeout event.

Definition at line 1088 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), ReceiveOk(), and SendRtsForPacket().

bool ns3::MacLow::m_ctsToSelfSupported
private

Definition at line 1139 of file mac-low.h.

Referenced by GetCtsToSelfSupported(), SetCtsToSelfSupported(), and StartTransmission().

Ptr<Packet> ns3::MacLow::m_currentPacket
private
QueueListeners ns3::MacLow::m_edcaListeners
private
EventId ns3::MacLow::m_endTxNoAckEvent
private

Event for finishing transmission that does not require ACK.

Definition at line 1093 of file mac-low.h.

Referenced by CancelAllEvents(), and DoDispose().

EventId ns3::MacLow::m_fastAckFailedTimeoutEvent
private

Fast ACK failed timeout event.

Definition at line 1086 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), and ReceiveError().

EventId ns3::MacLow::m_fastAckTimeoutEvent
private

Fast ACK timeout event.

Definition at line 1084 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), ReceiveOk(), and StartDataTxTimers().

Time ns3::MacLow::m_lastNavDuration
private

The duration of the latest NAV.

Definition at line 1113 of file mac-low.h.

Referenced by DoNavStartNow(), IsNavZero(), MacLow(), and NotifySwitchingStartNow().

Time ns3::MacLow::m_lastNavStart
private

The time when the latest NAV started.

Definition at line 1112 of file mac-low.h.

Referenced by DoNavResetNow(), DoNavStartNow(), IsNavZero(), MacLow(), NotifyNav(), and NotifySwitchingStartNow().

EventId ns3::MacLow::m_navCounterResetCtsMissed
private

Event to reset NAV when CTS is not received.

Definition at line 1094 of file mac-low.h.

Referenced by NotifyNav(), and NotifySwitchingStartNow().

EventId ns3::MacLow::m_normalAckTimeoutEvent
private

Normal ACK timeout event.

Definition at line 1083 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), ReceiveOk(), and StartDataTxTimers().

class PhyMacLowListener* ns3::MacLow::m_phyMacLowListener
private

Listerner needed to monitor when a channel switching occurs.

Definition at line 1117 of file mac-low.h.

Referenced by DoDispose(), and SetupPhyMacLowListener().

Time ns3::MacLow::m_pifs
private

PCF Interframe Space (PIFS) duration.

Definition at line 1109 of file mac-low.h.

Referenced by GetPifs(), and SetPifs().

bool ns3::MacLow::m_promisc
private

Flag if the device is operating in promiscuous mode.

Definition at line 1115 of file mac-low.h.

Referenced by IsPromisc(), MacLow(), ReceiveOk(), and SetPromisc().

Time ns3::MacLow::m_rifs
private

Reduced Interframe Space (RIFS) duration.

Definition at line 1110 of file mac-low.h.

Referenced by GetRifs(), and SetRifs().

MacLowRxCallback ns3::MacLow::m_rxCallback
private
Mac48Address ns3::MacLow::m_self
private
EventId ns3::MacLow::m_sendAckEvent
private

Event to send ACK.

Definition at line 1090 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), and ReceiveOk().

EventId ns3::MacLow::m_sendCtsEvent
private

Event to send CTS.

Definition at line 1089 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), and ReceiveOk().

EventId ns3::MacLow::m_sendDataEvent
private

Event to send DATA.

Definition at line 1091 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), ReceiveOk(), and SendCtsToSelf().

Time ns3::MacLow::m_sifs
private

Short Interframe Space (SIFS) duration.

Definition at line 1107 of file mac-low.h.

Referenced by GetSifs(), and SetSifs().

Time ns3::MacLow::m_slotTime
private

Slot duration.

Definition at line 1108 of file mac-low.h.

Referenced by GetSlotTime(), and SetSlotTime().

EventId ns3::MacLow::m_superFastAckTimeoutEvent
private

Super fast ACK timeout event.

Definition at line 1085 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), ReceiveOk(), and StartDataTxTimers().

MacLowTransmissionParameters ns3::MacLow::m_txParams
private

Transmission parameters of the current packet.

Definition at line 1099 of file mac-low.h.

Referenced by ReceiveError(), ReceiveOk(), SendBlockAckResponse(), SendCtsToSelf(), SendDataPacket(), SendRtsForPacket(), StartDataTxTimers(), and StartTransmission().

EventId ns3::MacLow::m_waitRifsEvent
private

Wait for RIFS event.

Definition at line 1095 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), and StartDataTxTimers().

EventId ns3::MacLow::m_waitSifsEvent
private

Wait for SIFS event.

Definition at line 1092 of file mac-low.h.

Referenced by CancelAllEvents(), DoDispose(), ReceiveOk(), and StartDataTxTimers().


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