A Discrete-Event Network Simulator
API
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:

Classes

struct  Item
 A struct for packet, Wifi header, and timestamp.item structure. More...
 

Public Types

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

Public Member Functions

 MacLow ()
 
virtual ~MacLow ()
 
Ptr< PacketAggregateToAmpdu (Ptr< const Packet > packet, const WifiMacHeader hdr)
 
Time CalculateOverallTxFragmentTime (Ptr< const Packet > packet, const WifiMacHeader *hdr, const MacLowTransmissionParameters &params, uint32_t fragmentSize) const
 
Time CalculateOverallTxTime (Ptr< const Packet > packet, const WifiMacHeader *hdr, const MacLowTransmissionParameters &params) const
 
Time CalculateTransmissionTime (Ptr< const Packet > packet, const WifiMacHeader *hdr, const MacLowTransmissionParameters &parameters) const
 
void CreateBlockAckAgreement (const MgtAddBaResponseHeader *respHdr, Mac48Address originator, uint16_t startingSeq)
 
void DeaggregateAmpduAndReceive (Ptr< Packet > aggregatedPacket, double rxSnr, WifiTxVector txVector)
 
void DestroyBlockAckAgreement (Mac48Address originator, uint8_t tid)
 
void FlushAggregateQueue (uint8_t tid)
 This function is called to flush the aggregate queue, which is used for A-MPDU. More...
 
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...
 
virtual WifiTxVector GetDataTxVector (Ptr< const Packet > packet, const WifiMacHeader *hdr) const
 Return a TXVECTOR for the DATA frame given the destination. More...
 
Ptr< WifiPhyGetPhy (void) const
 
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 NotifySleepNow (void)
 This method is typically invoked by the PhyMacLowListener to notify the MAC layer that the device has been put into sleep mode. More...
 
void NotifySwitchingStartNow (Time duration)
 
void ReceiveError (Ptr< Packet > packet, double rxSnr)
 
void ReceiveOk (Ptr< Packet > packet, double rxSnr, WifiTxVector txVector, bool ampduSubframe)
 
void RegisterDcf (Ptr< DcfManager > dcf)
 
void RegisterEdcaForAc (AcIndex ac, Ptr< EdcaTxopN > edca)
 
void ResetPhy (void)
 Remove WifiPhy associated with this MacLow. More...
 
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 (const 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 (const Ptr< WifiRemoteStationManager > manager)
 Set up WifiRemoteStationManager associated with this MacLow. More...
 
virtual void StartTransmission (Ptr< const Packet > packet, const WifiMacHeader *hdr, MacLowTransmissionParameters parameters, Ptr< DcaTxop > dca)
 
bool StopMpduAggregation (Ptr< const Packet > peekedPacket, WifiMacHeader peekedHdr, Ptr< Packet > aggregatedPacket, uint16_t size) const
 
- Public Member Functions inherited from ns3::Object
 Object ()
 Constructor. More...
 
virtual ~Object ()
 Destructor. More...
 
void AggregateObject (Ptr< Object > other)
 Aggregate two Objects together. More...
 
void Dispose (void)
 Dispose of this Object. More...
 
AggregateIterator GetAggregateIterator (void) const
 Get an iterator to the Objects aggregated to this one. More...
 
virtual TypeId GetInstanceTypeId (void) const
 Get the most derived TypeId for this Object. More...
 
template<typename T >
Ptr< T > GetObject (void) const
 Get a pointer to the requested aggregated Object. More...
 
template<typename T >
Ptr< T > GetObject (TypeId tid) const
 Get a pointer to the requested aggregated Object by TypeId. More...
 
void Initialize (void)
 Invoke DoInitialize on all Objects aggregated to this one. More...
 
bool IsInitialized (void) const
 Check if the object has been initialized. More...
 
- Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
 SimpleRefCount ()
 Default 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 operator. 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
 Get the value of an attribute, raising fatal errors if unsuccessful. More...
 
bool GetAttributeFailSafe (std::string name, AttributeValue &value) const
 Get the value of an attribute without raising erros. More...
 
void SetAttribute (std::string name, const AttributeValue &value)
 Set a single attribute, raising fatal errors if unsuccessful. More...
 
bool SetAttributeFailSafe (std::string name, const AttributeValue &value)
 Set a single attribute without raising errors. More...
 
bool TraceConnect (std::string name, std::string context, const CallbackBase &cb)
 Connect a TraceSource to a Callback with a context. More...
 
bool TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
 Connect a TraceSource to a Callback without a context. More...
 
bool TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
 Disconnect from a TraceSource a Callback previously connected with a context. More...
 
bool TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
 Disconnect from a TraceSource a Callback previously connected without a context. More...
 

Static Public Member Functions

static TypeId GetTypeId (void)
 Register this type. More...
 
- Static Public Member Functions inherited from ns3::Object
static TypeId GetTypeId (void)
 Register this type. More...
 
- Static Public Member Functions inherited from ns3::ObjectBase
static TypeId GetTypeId (void)
 Get the type ID. More...
 

Private Types

typedef std::pair< Mac48Address, uint8_t > AgreementKey
 agreement key typedef More...
 
typedef std::map< AgreementKey, AgreementValueAgreements
 agreements More...
 
typedef std::map< AgreementKey, AgreementValue >::iterator AgreementsI
 agreements iterator More...
 
typedef std::pair< BlockAckAgreement, std::list< BufferedPacket > > AgreementValue
 agreement value typedef More...
 
typedef std::map< AgreementKey, BlockAckCacheBlockAckCaches
 block ack caches typedef More...
 
typedef std::map< AgreementKey, BlockAckCache >::iterator BlockAckCachesI
 block ack caches iterator typedef More...
 
typedef std::pair< Ptr< Packet >, WifiMacHeaderBufferedPacket
 buffered packet typedef More...
 
typedef std::list< BufferedPacket >::iterator BufferedPacketI
 buffered packet iterator typedef More...
 
typedef std::vector< Ptr< DcfManager > > DcfManagers
 typedef for a list of DcfManager. More...
 
typedef std::vector< Ptr< DcfManager > >::const_iterator DcfManagersCI
 typedef for an iterator for a list of DcfManager. More...
 
typedef struct Item Item
 
typedef std::map< AcIndex, Ptr< EdcaTxopN > > QueueEdcas
 EDCA queues typedef. More...
 

Private Member Functions

void BlockAckTimeout (void)
 Event handler when block ACK timeout occurs. More...
 
void CancelAllEvents (void)
 Cancel all scheduled events. More...
 
void CtsTimeout (void)
 Event handler when CTS timeout occurs. More...
 
void DoDispose (void)
 Destructor implementation. 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)
 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...
 
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, BlockAckType type) const
 Return the time required to transmit the Block ACK to the specified address given the TXVECTOR of the BAR (including preamble and FCS). 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...
 
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...
 
WifiTxVector GetRtsTxVector (Ptr< const Packet > packet, const WifiMacHeader *hdr) const
 Return a TXVECTOR for the RTS frame given the destination. More...
 
void InsertInTxQueue (Ptr< const Packet > packet, const WifiMacHeader &hdr, Time tStamp, uint8_t tid)
 Insert in a temporary queue. More...
 
bool IsAmpdu (Ptr< const Packet > packet, const WifiMacHeader hdr)
 Checks if the given packet will be aggregated to an A-MPDU or not. 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) const
 Check if CTS-to-self mechanism should be used for the current packet. More...
 
bool NeedRts (void) const
 Check if the current packet should be sent with a RTS protection. More...
 
void NormalAckTimeout (void)
 Event handler when normal ACK timeout occurs. More...
 
void NotifyAckTimeoutResetNow ()
 Notify DcfManager that ACK timer should be resetted. More...
 
void NotifyAckTimeoutStartNow (Time duration)
 Notify DcfManager that ACK timer should be started for the given duration. More...
 
void NotifyCtsTimeoutResetNow ()
 Notify DcfManager that CTS timer should be resetted. More...
 
void NotifyCtsTimeoutStartNow (Time duration)
 Notify DcfManagerthat CTS timer should be started for the given duration. More...
 
void NotifyNav (Ptr< const Packet > packet, const WifiMacHeader &hdr, WifiPreamble preamble)
 Notify NAV function. More...
 
Ptr< PacketPerformMsduAggregation (Ptr< const Packet > packet, WifiMacHeader *hdr, Time *tstamp, Ptr< Packet > currentAmpduPacket, uint16_t blockAckSize)
 Perform MSDU aggregation for a given MPDU in an A-MPDU. More...
 
bool ReceiveMpdu (Ptr< Packet > packet, WifiMacHeader hdr)
 
void RemovePhyMacLowListener (Ptr< WifiPhy > phy)
 Remove current WifiPhy listener for this MacLow. More...
 
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 SendBlockAckAfterAmpdu (uint8_t tid, Mac48Address originator, Time duration, WifiTxVector blockAckReqTxVector, double rxSnr)
 Invoked after an A-MPDU has been received. More...
 
void SendBlockAckAfterBlockAckRequest (const CtrlBAckRequestHeader reqHdr, Mac48Address originator, Time duration, WifiMode blockAckReqTxMode, double rxSnr)
 Invoked after that a block ack request has been received. More...
 
void SendBlockAckResponse (const CtrlBAckResponseHeader *blockAck, Mac48Address originator, bool immediate, Time duration, WifiMode blockAckReqTxMode, double rxSnr)
 This method creates block ack frame with header equals to blockAck and start its transmission. More...
 
void SendCtsAfterRts (Mac48Address source, Time duration, WifiTxVector rtsTxVector, 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)
 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 SendMpdu (Ptr< const Packet > packet, WifiTxVector txVector, MpduType mpdutype)
 Forward the MPDU down to WifiPhy for transmission. More...
 
void SendRtsForPacket (void)
 Send RTS to begin RTS-CTS-DATA-ACK transaction. More...
 
void SetupPhyMacLowListener (const 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 WaitIfsAfterEndTxFragment (void)
 Event handler that is usually scheduled to fired at the appropriate time after completing transmissions. More...
 
void WaitIfsAfterEndTxPacket (void)
 Event handler that is usually scheduled to fired at the appropriate time after sending a packet. More...
 

Static Private Member Functions

static void AddWifiMacTrailer (Ptr< Packet > packet)
 Add FCS trailer to a packet. More...
 
static uint32_t GetAckSize (void)
 Return the total ACK size (including FCS trailer). More...
 
static uint32_t GetBlockAckSize (BlockAckType type)
 Return the total Block ACK size (including FCS trailer). More...
 
static uint32_t GetCtsSize (void)
 Return the total CTS size (including FCS trailer). More...
 
static uint32_t GetRtsSize (void)
 Return the total RTS size (including FCS trailer). More...
 
static uint32_t GetSize (Ptr< const Packet > packet, const WifiMacHeader *hdr, bool isAmpdu)
 Return the total size of the packet after WifiMacHeader and FCS trailer have been added. More...
 
static bool IsInWindow (uint16_t seq, uint16_t winstart, uint16_t winsize)
 

Private Attributes

Time m_ackTimeout
 ACK timeout duration. More...
 
Ptr< WifiMacQueuem_aggregateQueue [8]
 Queues per TID used for MPDU aggregation. More...
 
bool m_ampdu
 Flag if the current transmission involves an A-MPDU. More...
 
Agreements m_bAckAgreements
 block ack agreements More...
 
BlockAckCaches m_bAckCaches
 block ack caches More...
 
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
 Flag whether CTS-to-self is supported. More...
 
Ptr< DcaTxopm_currentDca
 Current DCA. More...
 
WifiMacHeader m_currentHdr
 Header of the current transmitted packet. More...
 
Ptr< Packetm_currentPacket
 Current packet transmitted/to be transmitted. More...
 
WifiTxVector m_currentTxVector
 TXVECTOR used for the current packet transmission. More...
 
DcfManagers m_dcfManagers
 List of DcfManager. More...
 
QueueEdcas m_edca
 EDCA queues. More...
 
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...
 
WifiMacHeader m_lastReceivedHdr
 Header of the last received 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
 Listener 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...
 
std::vector< Itemm_txPackets [8]
 Contain temporary items to be sent with the next A-MPDU transmission for a given TID, once RTS/CTS exchange has succeeded. More...
 
MacLowTransmissionParameters m_txParams
 Transmission parameters of the current packet. More...
 
EventId m_waitIfsEvent
 Wait for IFS event. More...
 

Friends

class ::AmpduAggregationTest
 Allow test cases to access private members. More...
 
class ::TwoLevelAggregationTest
 Allow test cases to access private members. More...
 

Additional Inherited Members

- Protected Member Functions inherited from ns3::Object
 Object (const Object &o)
 Copy an Object. More...
 
virtual void DoInitialize (void)
 Initialize() implementation. More...
 
virtual void NotifyNewAggregate (void)
 Notify all Objects aggregated to this one of a new Object being aggregated. More...
 
- Protected Member Functions inherited from ns3::ObjectBase
void ConstructSelf (const AttributeConstructionList &attributes)
 Complete construction of ObjectBase; invoked by derived classes. More...
 
virtual void NotifyConstructionCompleted (void)
 Notifier called once the ObjectBase is fully constructed. More...
 

Detailed Description

handle RTS/CTS/DATA/ACK transactions.

Introspection did not find any typical Config paths.


No Attributes are defined for this type.
No TraceSources are defined for this type.
Size of this type is 18446744073709551615 bytes (on a 64-bit architecture).

Definition at line 244 of file mac-low.h.

Member Typedef Documentation

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

agreement key typedef

Definition at line 1161 of file mac-low.h.

agreements

Definition at line 1164 of file mac-low.h.

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

agreements iterator

Definition at line 1165 of file mac-low.h.

agreement value typedef

Definition at line 1162 of file mac-low.h.

block ack caches typedef

Definition at line 1167 of file mac-low.h.

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

block ack caches iterator typedef

Definition at line 1168 of file mac-low.h.

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

buffered packet typedef

Definition at line 1158 of file mac-low.h.

buffered packet iterator typedef

Definition at line 1159 of file mac-low.h.

typedef std::vector<Ptr<DcfManager> > ns3::MacLow::DcfManagers
private

typedef for a list of DcfManager.

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

typedef std::vector<Ptr<DcfManager> >::const_iterator ns3::MacLow::DcfManagersCI
private

typedef for an iterator for a list of DcfManager.

Definition at line 1111 of file mac-low.h.

typedef struct Item ns3::MacLow::Item
private

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

typedef for a callback for MacLowRx

Definition at line 254 of file mac-low.h.

typedef std::map<AcIndex, Ptr<EdcaTxopN> > ns3::MacLow::QueueEdcas
private

EDCA queues typedef.

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

Constructor & Destructor Documentation

ns3::MacLow::MacLow ( )

Definition at line 261 of file mac-low.cc.

References m_aggregateQueue, and NS_LOG_FUNCTION.

ns3::MacLow::~MacLow ( )
virtual

Definition at line 289 of file mac-low.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

void ns3::MacLow::AddWifiMacTrailer ( Ptr< Packet packet)
staticprivate

Add FCS trailer to a packet.

Parameters
packet

Definition at line 3095 of file mac-low.cc.

References ns3::Packet::AddTrailer().

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

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Ptr< Packet > ns3::MacLow::AggregateToAmpdu ( Ptr< const Packet packet,
const WifiMacHeader  hdr 
)
Parameters
packetthe packet to be aggregated. If the aggregation is succesfull, it corresponds either to the first data packet that will be aggregated or to the BAR that will be piggybacked at the end of the A-MPDU.
hdrthe WifiMacHeader for the packet.
Returns
the A-MPDU packet if aggregation is successfull, the input packet otherwise

This function adds the packets that will be added to an A-MPDU to an aggregate queue

Todo:
We should also handle Ack and BlockAck

Definition at line 2697 of file mac-low.cc.

References ns3::Packet::AddHeader(), ns3::Packet::AddPacketTag(), ns3::WifiMacHeader::ADDR1, AddWifiMacTrailer(), ns3::WifiMacHeader::BLOCK_ACK, ns3::Packet::Copy(), FlushAggregateQueue(), ns3::WifiMacHeader::GetAddr1(), GetDataTxVector(), ns3::WifiTxVector::GetMode(), ns3::WifiMode::GetModulationClass(), ns3::WifiMacHeader::GetSequenceNumber(), ns3::Packet::GetSize(), ns3::WifiMacHeader::GetSize(), ns3::CtrlBAckRequestHeader::GetStartingSequence(), ns3::GetTid(), InsertInTxQueue(), ns3::WifiMacHeader::IsBlockAck(), ns3::WifiMacHeader::IsBlockAckReq(), ns3::Mac48Address::IsBroadcast(), IsInWindow(), ns3::WifiMacHeader::IsQosData(), m_aggregateQueue, m_currentHdr, m_currentPacket, m_edca, m_txParams, ns3::MacLowTransmissionParameters::MustSendRts(), ns3::WifiMacHeader::NORMAL_ACK, NS_ASSERT, NS_LOG_DEBUG, ns3::Packet::PeekHeader(), PerformMsduAggregation(), ns3::QosUtilsMapTidToAc(), ns3::AmpduTag::SetAmpdu(), ns3::WifiMacHeader::SetQosAckPolicy(), ns3::AmpduTag::SetRemainingNbOfMpdus(), StopMpduAggregation(), ns3::WIFI_MAC_FCS_LENGTH, ns3::WIFI_MOD_CLASS_HE, and ns3::WIFI_MOD_CLASS_VHT.

Referenced by IsAmpdu().

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

Event handler when block ACK timeout occurs.

Definition at line 1652 of file mac-low.cc.

References FlushAggregateQueue(), ns3::GetTid(), m_aggregateQueue, m_ampdu, m_currentDca, m_currentHdr, m_currentPacket, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by StartDataTxTimers().

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Time ns3::MacLow::CalculateOverallTxFragmentTime ( Ptr< const Packet packet,
const WifiMacHeader hdr,
const MacLowTransmissionParameters params,
uint32_t  fragmentSize 
) const
Parameters
packetto send (does not include the 802.11 MAC header and checksum)
hdrheader associated to the packet to send.
paramstransmission parameters of packet.
fragmentSizethe packet fragment size
Returns
the transmission time that includes the time for the next packet transmission

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

Definition at line 1330 of file mac-low.cc.

References ns3::WifiPhy::CalculateTxDuration(), GetAckDuration(), ns3::WifiMacHeader::GetAddr1(), GetCtsDuration(), GetDataTxVector(), ns3::WifiPhy::GetFrequency(), GetRtsSize(), GetRtsTxVector(), GetSifs(), GetSize(), m_ampdu, m_phy, ns3::MacLowTransmissionParameters::MustSendRts(), ns3::MacLowTransmissionParameters::MustWaitAck(), and ns3::Seconds().

Referenced by ns3::EdcaTxopN::GetTxopFragmentSize().

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Time ns3::MacLow::CalculateOverallTxTime ( Ptr< const Packet packet,
const WifiMacHeader hdr,
const MacLowTransmissionParameters params 
) const
Parameters
packetto send (does not include the 802.11 MAC header and checksum)
hdrheader associated to the packet to send.
paramstransmission 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 1306 of file mac-low.cc.

References ns3::WifiPhy::CalculateTxDuration(), GetAckDuration(), ns3::WifiMacHeader::GetAddr1(), GetCtsDuration(), GetDataTxVector(), ns3::WifiPhy::GetFrequency(), GetRtsSize(), GetRtsTxVector(), GetSifs(), GetSize(), m_ampdu, m_phy, ns3::MacLowTransmissionParameters::MustSendRts(), ns3::MacLowTransmissionParameters::MustWaitAck(), and ns3::Seconds().

Referenced by CalculateTransmissionTime(), ns3::EdcaTxopN::HasTxop(), and ns3::EdcaTxopN::NeedFragmentation().

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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 1356 of file mac-low.cc.

References CalculateOverallTxTime(), ns3::WifiPhy::CalculateTxDuration(), GetDataTxVector(), ns3::WifiPhy::GetFrequency(), ns3::MacLowTransmissionParameters::GetNextPacketSize(), GetSifs(), ns3::MacLowTransmissionParameters::HasNextPacket(), and m_phy.

Referenced by ns3::WaveMacLow::StartTransmission().

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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 354 of file mac-low.cc.

References ns3::EventId::Cancel(), ns3::EventId::IsRunning(), m_blockAckTimeoutEvent, m_ctsTimeoutEvent, m_currentDca, m_endTxNoAckEvent, m_fastAckFailedTimeoutEvent, m_fastAckTimeoutEvent, m_normalAckTimeoutEvent, m_sendAckEvent, m_sendCtsEvent, m_sendDataEvent, m_superFastAckTimeoutEvent, m_waitIfsEvent, and NS_LOG_FUNCTION.

Referenced by NotifySleepNow(), 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 2245 of file mac-low.cc.

References 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_edca, ns3::MicroSeconds(), NS_LOG_FUNCTION, ns3::QosUtilsMapTidToAc(), ns3::Simulator::Schedule(), ns3::EdcaTxopN::SendDelbaFrame(), ns3::BlockAckAgreement::SetAmsduSupport(), ns3::BlockAckAgreement::SetBufferSize(), ns3::BlockAckAgreement::SetDelayedBlockAck(), ns3::BlockAckAgreement::SetImmediateBlockAck(), ns3::BlockAckAgreement::SetStartingSequence(), ns3::BlockAckAgreement::SetTimeout(), and timeout.

Referenced by ns3::RegularWifiMac::SendAddBaResponse().

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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 1600 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), m_ampdu, m_currentDca, m_currentHdr, m_stationManager, NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::WifiRemoteStationManager::ReportRtsFailed().

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 2287 of file mac-low.cc.

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

Referenced by ns3::EdcaTxopN::GotAck(), and ns3::RegularWifiMac::Receive().

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

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 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_aggregateQueue, m_ampdu, 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_waitIfsEvent, 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 1422 of file mac-low.cc.

References m_dcfManagers, m_lastNavDuration, 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
durationthe duration
Returns
true if NAV is resetted

Definition at line 1433 of file mac-low.cc.

References m_dcfManagers, 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 2115 of file mac-low.cc.

References m_currentDca.

Referenced by StartDataTxTimers().

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

Event handler when fast ACK timeout occurs (busy).

Definition at line 2123 of file mac-low.cc.

References m_currentDca, 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 1634 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiPhy::IsStateIdle(), m_currentDca, m_currentHdr, m_phy, m_stationManager, NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::WifiRemoteStationManager::ReportDataFailed().

Referenced by StartDataTxTimers().

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void ns3::MacLow::FlushAggregateQueue ( uint8_t  tid)

This function is called to flush the aggregate queue, which is used for A-MPDU.

Parameters
tidthe Traffic ID

Definition at line 3009 of file mac-low.cc.

References m_aggregateQueue, m_txPackets, and NS_LOG_DEBUG.

Referenced by AggregateToAmpdu(), BlockAckTimeout(), ns3::EdcaTxopN::MissedCts(), NormalAckTimeout(), and ReceiveOk().

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

Forward the packet down to WifiPhy for transmission.

This is called for the entire A-MPDu when MPDU aggregation is used.

Parameters
packetthe packet
hdrthe header
txVectorthe transmit vector

Definition at line 1487 of file mac-low.cc.

References ns3::Packet::AddHeader(), ns3::Packet::AddPacketTag(), AddWifiMacTrailer(), ns3::WifiPhy::CalculateTxDuration(), ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacHeader::GetDuration(), ns3::WifiPhy::GetFrequency(), ns3::WifiTxVector::GetMode(), ns3::WifiTxVector::GetPreambleType(), ns3::WifiMacHeader::GetSequenceControl(), ns3::Packet::GetSize(), ns3::GetTid(), ns3::WifiMacHeader::GetTypeString(), ns3::WifiMacHeader::IsAck(), ns3::WifiMacHeader::IsBlockAck(), ns3::WifiMacHeader::IsCts(), ns3::WifiMacHeader::IsMgt(), ns3::WifiMacHeader::IsRts(), ns3::Time::IsZero(), ns3::LAST_MPDU_IN_AGGREGATE, m_aggregateQueue, m_ampdu, m_currentHdr, m_edca, m_phy, ns3::MPDU_IN_AGGREGATE, ns3::NanoSeconds(), ns3::NORMAL_MPDU, NS_ASSERT, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::QosUtilsMapTidToAc(), ns3::Simulator::Schedule(), ns3::Seconds(), SendMpdu(), ns3::WifiPhy::SendPacket(), ns3::WifiTxVector::SetAggregation(), ns3::AmpduTag::SetAmpdu(), ns3::WifiMacHeader::SetDuration(), ns3::WifiTxVector::SetPreambleType(), ns3::AmpduTag::SetRemainingAmpduDuration(), ns3::AmpduTag::SetRemainingNbOfMpdus(), and ns3::WIFI_PREAMBLE_NONE.

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 1201 of file mac-low.cc.

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

Referenced by CalculateOverallTxFragmentTime(), 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 1194 of file mac-low.cc.

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

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uint32_t ns3::MacLow::GetAckSize ( void  )
staticprivate

Return the total ACK size (including FCS trailer).

Returns
the total ACK size

Definition at line 1156 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 535 of file mac-low.cc.

References m_ackTimeout.

Referenced by ns3::RegularWifiMac::GetAckTimeout(), and 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 1282 of file mac-low.cc.

References ns3::WifiRemoteStationManager::GetAckTxVector(), and 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 1300 of file mac-low.cc.

References GetAckTxVector().

Referenced by GetAckDuration().

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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 541 of file mac-low.cc.

References m_basicBlockAckTimeout.

Referenced by ns3::RegularWifiMac::GetBasicBlockAckTimeout(), and StartDataTxTimers().

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

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

Parameters
to
blockAckReqTxVector
typethe Block ACK type
Returns
the time required to transmit the Block ACK (including preamble and FCS)

Definition at line 1208 of file mac-low.cc.

References ns3::WifiPhy::CalculateTxDuration(), GetBlockAckSize(), ns3::WifiPhy::GetFrequency(), and m_phy.

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

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uint32_t ns3::MacLow::GetBlockAckSize ( BlockAckType  type)
staticprivate

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

Parameters
typethe Block ACK type
Returns
the total Block ACK size

Definition at line 1164 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 1288 of file mac-low.cc.

References ns3::WifiRemoteStationManager::GetBlockAckTxVector(), and m_stationManager.

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

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

Return the Basic Service Set Identification.

Returns
BSSID

Definition at line 585 of file mac-low.cc.

References m_bssid.

Referenced by ns3::RegularWifiMac::GetBssid(), ns3::EdcaTxopN::MissedAck(), ns3::EdcaTxopN::MissedBlockAck(), ns3::EdcaTxopN::MissedCts(), ns3::EdcaTxopN::NotifyAccessGranted(), PerformMsduAggregation(), and ns3::EdcaTxopN::SendBlockAckRequest().

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Time ns3::MacLow::GetCompressedBlockAckTimeout ( ) const

Return Compressed Block ACK timeout of this MacLow.

Returns
Compressed Block ACK timeout

Definition at line 547 of file mac-low.cc.

References m_compressedBlockAckTimeout.

Referenced by ns3::RegularWifiMac::GetCompressedBlockAckTimeout(), and 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 1225 of file mac-low.cc.

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

Referenced by CalculateOverallTxFragmentTime(), 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 1218 of file mac-low.cc.

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

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uint32_t ns3::MacLow::GetCtsSize ( void  )
staticprivate

Return the total CTS size (including FCS trailer).

Returns
the total CTS size

Definition at line 1232 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 553 of file mac-low.cc.

References m_ctsTimeout.

Referenced by ns3::RegularWifiMac::GetCtsTimeout(), and 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 481 of file mac-low.cc.

References m_ctsToSelfSupported.

Referenced by ns3::RegularWifiMac::GetCtsToSelfSupported().

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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 1256 of file mac-low.cc.

References ns3::WifiRemoteStationManager::GetCtsToSelfTxVector(), and m_stationManager.

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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 1276 of file mac-low.cc.

References ns3::WifiRemoteStationManager::GetCtsTxVector(), and 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 1294 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
virtual

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 1269 of file mac-low.cc.

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

Referenced by AggregateToAmpdu(), CalculateOverallTxFragmentTime(), CalculateOverallTxTime(), CalculateTransmissionTime(), AmpduAggregationTest::DoRun(), TwoLevelAggregationTest::DoRun(), ns3::WaveMacLow::GetDataTxVector(), NeedCtsToSelf(), NeedRts(), ns3::EdcaTxopN::RestartAccessIfNeeded(), ns3::EdcaTxopN::StartAccessIfNeeded(), and StartTransmission().

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Ptr< WifiPhy > ns3::MacLow::GetPhy ( void  ) const
Returns
current attached PHY device

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

References m_phy.

Referenced by ns3::WaveMacLow::StartTransmission().

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

Return PCF Interframe Space (PIFS) of this MacLow.

Returns
PIFS

Definition at line 579 of file mac-low.cc.

References m_pifs.

Referenced by ns3::RegularWifiMac::GetPifs(), and StartDataTxTimers().

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

Return Reduced Interframe Space (RIFS) of this MacLow.

Returns
RIFS

Definition at line 566 of file mac-low.cc.

References m_rifs, and NS_LOG_FUNCTION.

Referenced by ns3::RegularWifiMac::GetRifs(), ReceiveOk(), SendDataAfterCts(), SendDataPacket(), and StartDataTxTimers().

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uint32_t ns3::MacLow::GetRtsSize ( void  )
staticprivate

Return the total RTS size (including FCS trailer).

Returns
the total RTS size

Definition at line 1186 of file mac-low.cc.

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

Referenced by CalculateOverallTxFragmentTime(), 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 1262 of file mac-low.cc.

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

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

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uint32_t ns3::MacLow::GetSize ( Ptr< const Packet packet,
const WifiMacHeader hdr,
bool  isAmpdu 
)
staticprivate

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
isAmpduwhether packet is part of an A-MPDU
Returns
the total packet size

Definition at line 1240 of file mac-low.cc.

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

Referenced by CalculateOverallTxFragmentTime(), 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 573 of file mac-low.cc.

References m_slotTime.

Referenced by ns3::RegularWifiMac::GetSlot(), and NotifyNav().

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TypeId ns3::MacLow::GetTypeId ( void  )
static

Register this type.

Returns
The TypeId.

Definition at line 296 of file mac-low.cc.

References ns3::TypeId::SetParent().

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void ns3::MacLow::InsertInTxQueue ( Ptr< const Packet packet,
const WifiMacHeader hdr,
Time  tStamp,
uint8_t  tid 
)
private

Insert in a temporary queue.

It is only used with a RTS/CTS exchange for an A-MPDU transmission.

Parameters
packetpacket to be inserted in the A-MPDU tx queue
hdr802.11 header for the packet to be inserted in the A-MPDU tx queue
tStamptimestamp of the packet to be inserted in the A-MPDU tx queue
tidthe Traffic ID of the packet to be inserted in the A-MPDU tx queue

Definition at line 3020 of file mac-low.cc.

References ns3::MacLow::Item::hdr, m_txPackets, NS_LOG_FUNCTION, ns3::MacLow::Item::packet, and ns3::MacLow::Item::timestamp.

Referenced by AggregateToAmpdu().

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

Checks if the given packet will be aggregated to an A-MPDU or not.

Parameters
packetpacket to check whether it can be aggregated in an A-MPDU
hdr802.11 header for packet to check whether it can be aggregated in an A-MPDU
Returns
true if is A-MPDU

Definition at line 609 of file mac-low.cc.

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

Referenced by AmpduAggregationTest::DoRun(), and StartTransmission().

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bool ns3::MacLow::IsInWindow ( uint16_t  seq,
uint16_t  winstart,
uint16_t  winsize 
)
staticprivate
Parameters
seqMPDU sequence number
winstartsequence number window start
winsizethe size of the sequence number window (currently default is 64)
Returns
true if in the window

This method checks if the MPDU's sequence number is inside the scoreboard boundaries or not

Definition at line 2165 of file mac-low.cc.

Referenced by AggregateToAmpdu(), and ReceiveMpdu().

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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 1893 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 591 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 1413 of file mac-low.cc.

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

Referenced by NotifyNav().

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bool ns3::MacLow::NeedCtsToSelf ( void  ) const
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 758 of file mac-low.cc.

References GetDataTxVector(), m_currentHdr, m_currentPacket, m_stationManager, and ns3::WifiRemoteStationManager::NeedCtsToSelf().

Referenced by StartTransmission().

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

Check if the current packet should be sent with a RTS protection.

Returns
true if RTS protection should be used, false otherwise

Definition at line 750 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr1(), GetDataTxVector(), m_currentHdr, m_currentPacket, m_stationManager, and ns3::WifiRemoteStationManager::NeedRts().

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 1615 of file mac-low.cc.

References FlushAggregateQueue(), ns3::WifiMacHeader::GetAddr1(), ns3::GetTid(), ns3::WifiMacHeader::IsQosData(), m_ampdu, m_currentDca, m_currentHdr, m_currentPacket, m_stationManager, NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::WifiRemoteStationManager::ReportDataFailed().

Referenced by StartDataTxTimers().

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void ns3::MacLow::NotifyAckTimeoutResetNow ( )
private

Notify DcfManager that ACK timer should be resetted.

Definition at line 1460 of file mac-low.cc.

References m_dcfManagers.

Referenced by ReceiveOk().

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

Notify DcfManager that ACK timer should be started for the given duration.

Parameters
durationthe duration

Definition at line 1451 of file mac-low.cc.

References m_dcfManagers.

Referenced by StartDataTxTimers().

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void ns3::MacLow::NotifyCtsTimeoutResetNow ( )
private

Notify DcfManager that CTS timer should be resetted.

Definition at line 1478 of file mac-low.cc.

References m_dcfManagers.

Referenced by ReceiveOk().

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

Notify DcfManagerthat CTS timer should be started for the given duration.

Parameters
duration

Definition at line 1469 of file mac-low.cc.

References m_dcfManagers.

Referenced by SendRtsForPacket().

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

Notify NAV function.

Parameters
packetthe packet
hdrthe header
preamblethe preamble
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 1371 of file mac-low.cc.

References ns3::WifiPhy::CalculateTxDuration(), DoNavResetNow(), DoNavStartNow(), ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacHeader::GetAddr2(), ns3::WifiMacHeader::GetDuration(), ns3::WifiPhy::GetFrequency(), 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 DeaggregateAmpduAndReceive(), and ReceiveOk().

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void ns3::MacLow::NotifySleepNow ( void  )

This method is typically invoked by the PhyMacLowListener to notify the MAC layer that the device has been put into sleep mode.

When the device is put into sleep mode, pending MAC transmissions (RTS, CTS, DATA and ACK) are cancelled.

Definition at line 795 of file mac-low.cc.

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

Referenced by ns3::PhyMacLowListener::NotifySleep(), and ns3::OcbWifiMac::Suspend().

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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 779 of file mac-low.cc.

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

Referenced by ns3::PhyMacLowListener::NotifySwitchingStart(), and ns3::OcbWifiMac::Reset().

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Ptr< Packet > ns3::MacLow::PerformMsduAggregation ( Ptr< const Packet packet,
WifiMacHeader hdr,
Time tstamp,
Ptr< Packet currentAmpduPacket,
uint16_t  blockAckSize 
)
private

Perform MSDU aggregation for a given MPDU in an A-MPDU.

Parameters
packetpacket picked for aggregation
hdr802.11 header for packet picked for aggregation
tstamptimestamp
currentAmpduPacketcurrent A-MPDU packet
blockAckSizesize of the piggybacked block ack request
Returns
the aggregate if MSDU aggregation succeeded, 0 otherwise

Definition at line 3031 of file mac-low.cc.

References ns3::WifiMacHeader::ADDR1, ns3::WifiMacHeader::GetAddr1(), GetBssid(), ns3::WifiMacHeader::GetQosTid(), ns3::Packet::GetSize(), ns3::GetTid(), m_edca, NS_ASSERT, NS_LOG_DEBUG, ns3::QosUtilsMapTidToAc(), ns3::WifiMacHeader::SetAddr3(), ns3::WifiMacHeader::SetQosAmsdu(), and StopMpduAggregation().

Referenced by AggregateToAmpdu(), and TwoLevelAggregationTest::DoRun().

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void ns3::MacLow::ReceiveError ( Ptr< 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 765 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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bool ns3::MacLow::ReceiveMpdu ( Ptr< Packet packet,
WifiMacHeader  hdr 
)
private
Parameters
packetthe packet
hdrthe header
Returns
true if MPDU received

This method updates the reorder buffer and the scoreboard when an MPDU is received in an HT station and stores the MPDU if needed when an MPDU is received in an non-HT Station (implements HT immediate block Ack)

Definition at line 2171 of file mac-low.cc.

References ns3::WifiMacHeader::GetAddr2(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacHeader::GetSequenceNumber(), ns3::WifiRemoteStationManager::HasHtSupported(), ns3::WifiRemoteStationManager::HasVhtSupported(), IsInWindow(), ns3::WifiMacHeader::IsQosData(), m_bAckAgreements, m_stationManager, ns3::QosUtilsIsOldPacket(), RxCompleteBufferedPacketsUntilFirstLost(), RxCompleteBufferedPacketsWithSmallerSequence(), and StoreMpduIfNeeded().

Referenced by ReceiveOk().

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void ns3::MacLow::ReceiveOk ( Ptr< Packet packet,
double  rxSnr,
WifiTxVector  txVector,
bool  ampduSubframe 
)
Parameters
packetpacket received
rxSnrsnr of packet received
txVectorTXVECTOR of packet received
ampduSubframetrue if this MPDU is part of an A-MPDU

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

Definition at line 810 of file mac-low.cc.

References ns3::Packet::AddPacketTag(), ns3::EventId::Cancel(), FlushAggregateQueue(), ns3::WifiMacHeader::GetAddr1(), ns3::WifiTxVector::GetMode(), ns3::WifiTxVector::GetPreambleType(), ns3::WifiMacHeader::GetQosTid(), GetRifs(), ns3::WifiRemoteStationManager::GetRifsPermitted(), GetSifs(), ns3::CtrlBAckRequestHeader::GetStartingSequence(), ns3::GetTid(), ns3::CtrlBAckRequestHeader::GetTidInfo(), ns3::MacLowTransmissionParameters::HasNextPacket(), ns3::EventId::IsExpired(), ns3::CtrlBAckRequestHeader::IsMultiTid(), IsNavZero(), ns3::WifiMacHeader::IsQosData(), ns3::EventId::IsRunning(), m_ampdu, m_bAckAgreements, m_bAckCaches, m_blockAckTimeoutEvent, m_ctsTimeoutEvent, m_currentDca, m_currentHdr, m_currentPacket, m_edca, m_fastAckTimeoutEvent, m_lastReceivedHdr, m_normalAckTimeoutEvent, m_promisc, m_rxCallback, m_self, m_sendAckEvent, m_sendCtsEvent, m_sendDataEvent, m_stationManager, m_superFastAckTimeoutEvent, m_txParams, m_waitIfsEvent, 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(), ReceiveMpdu(), ns3::Packet::RemoveHeader(), ns3::Packet::RemovePacketTag(), ns3::Packet::RemoveTrailer(), ns3::WifiRemoteStationManager::ReportDataOk(), ns3::WifiRemoteStationManager::ReportRtsOk(), ns3::WifiRemoteStationManager::ReportRxOk(), ResetBlockAckInactivityTimerIfNeeded(), RxCompleteBufferedPacketsUntilFirstLost(), RxCompleteBufferedPacketsWithSmallerSequence(), ns3::Simulator::Schedule(), SendAckAfterData(), SendBlockAckAfterBlockAckRequest(), SendCtsAfterRts(), SendDataAfterCts(), ns3::SnrTag::Set(), WaitIfsAfterEndTxFragment(), and WaitIfsAfterEndTxPacket().

Referenced by DeaggregateAmpduAndReceive().

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