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:

List of all members.

Public Types
typedef Callback< void, Ptr < Packet >, const WifiMacHeader * >	MacLowRxCallback
Public Member Functions
void	SetPhy (Ptr< WifiPhy > phy)
void	SetWifiRemoteStationManager (Ptr< WifiRemoteStationManager > manager)
void	SetAddress (Mac48Address ad)
void	SetAckTimeout (Time ackTimeout)
void	SetBasicBlockAckTimeout (Time blockAckTimeout)
void	SetCompressedBlockAckTimeout (Time blockAckTimeout)
void	SetCtsTimeout (Time ctsTimeout)
void	SetSifs (Time sifs)
void	SetSlotTime (Time slotTime)
void	SetPifs (Time pifs)
void	SetBssid (Mac48Address ad)
Mac48Address	GetAddress (void) const
Time	GetAckTimeout (void) const
Time	GetBasicBlockAckTimeout () const
Time	GetCompressedBlockAckTimeout () const
Time	GetCtsTimeout (void) const
Time	GetSifs (void) const
Time	GetSlotTime (void) const
Time	GetPifs (void) const
Mac48Address	GetBssid (void) const
void	SetRxCallback (Callback< void, Ptr< Packet >, const WifiMacHeader * > callback)
void	RegisterDcfListener (MacLowDcfListener *listener)
Time	CalculateTransmissionTime (Ptr< const Packet > packet, const WifiMacHeader *hdr, const MacLowTransmissionParameters &parameters) const
void	StartTransmission (Ptr< const Packet > packet, const WifiMacHeader *hdr, MacLowTransmissionParameters parameters, MacLowTransmissionListener *listener)
void	ReceiveOk (Ptr< Packet > packet, double rxSnr, WifiMode txMode, WifiPreamble preamble)
void	ReceiveError (Ptr< const Packet > packet, double rxSnr)
void	NotifySwitchingStartNow (Time duration)
void	CreateBlockAckAgreement (const MgtAddBaResponseHeader *respHdr, Mac48Address originator, uint16_t startingSeq)
void	DestroyBlockAckAgreement (Mac48Address originator, uint8_t tid)
void	RegisterBlockAckListenerForAc (enum AcIndex ac, MacLowBlockAckEventListener *listener)

---

Detailed Description

handle RTS/CTS/DATA/ACK transactions.

---

Member Function Documentation

Time ns3::MacLow::CalculateTransmissionTime	(	Ptr< const Packet >	packet,
		const WifiMacHeader *	hdr,
		const MacLowTransmissionParameters &	parameters
	)			const

Parameters:

	packet	to send (does not include the 802.11 MAC header and checksum)
	hdr	header associated to the packet to send.
	parameters	transmission parameters of packet.

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

void ns3::MacLow::CreateBlockAckAgreement	(	const MgtAddBaResponseHeader *	respHdr,
		Mac48Address	originator,
		uint16_t	startingSeq
	)

Parameters:

	respHdr	Add block ack response from originator (action frame).
	originator	Address of peer station involved in block ack mechanism.
	startingSeq	Sequence number of the first MPDU of all packets for which block ack was negotiated.

This function is typically invoked only by ns3::QapWifiMac and ns3::QstaWifiMac. If we are transmitting an Add block ack response, MacLow must allocate buffers to collect all correctly received packets belonging to category for which block ack was negotiated. It's needed in order to send a Block ack after corresponding originator's Block ack request.

void ns3::MacLow::DestroyBlockAckAgreement	(	Mac48Address	originator,
		uint8_t	tid
	)

Parameters:

	originator	Address of peer participating in Block Ack mechanism.
	tid	TID 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.

void ns3::MacLow::NotifySwitchingStartNow

(

Time

duration

)

Parameters:

duration

switching 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.

void ns3::MacLow::ReceiveError	(	Ptr< const Packet >	packet,
		double	rxSnr
	)

Parameters:

	packet	packet received.
	rxSnr	snr of packet received.

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

void ns3::MacLow::ReceiveOk	(	Ptr< Packet >	packet,
		double	rxSnr,
		WifiMode	txMode,
		WifiPreamble	preamble
	)

Parameters:

	packet	packet received
	rxSnr	snr of packet received
	txMode	transmission mode of packet received
	preamble	type 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.

void ns3::MacLow::RegisterBlockAckListenerForAc	(	enum AcIndex	ac,
		MacLowBlockAckEventListener *	listener
	)

Parameters:

	ac	Access class managed by the queue.
	listener	The listener for the queue.

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

void ns3::MacLow::RegisterDcfListener

(

MacLowDcfListener *

listener

)

Parameters:

listener

listen to NAV events for every incoming and outgoing packet.

void ns3::MacLow::SetRxCallback

(

Callback< void, Ptr< Packet >, const WifiMacHeader * >

callback

)

Parameters:

callback

the callback which receives every incoming packet.

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

void ns3::MacLow::StartTransmission	(	Ptr< const Packet >	packet,
		const WifiMacHeader *	hdr,
		MacLowTransmissionParameters	parameters,
		MacLowTransmissionListener *	listener
	)

Parameters:

	packet	packet to send
	hdr	802.11 header for packet to send
	parameters	the transmission parameters to use for this packet.
	listener	listen to transmission events.

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

---

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

• src/devices/wifi/mac-low.h