Maintains the state and information about transmitted MPDUs with ack policy block ack for an originator station. More...

#include <originator-block-ack-agreement.h>

Inheritance diagram for ns3::OriginatorBlockAckAgreement:

Collaboration diagram for ns3::OriginatorBlockAckAgreement:

Public Types
enum	State { PENDING, ESTABLISHED, INACTIVE, UNSUCCESSFUL }
	Represents the state for this agreement. More...

Public Member Functions
	OriginatorBlockAckAgreement ()

	OriginatorBlockAckAgreement (Mac48Address recipient, uint8_t tid)

	~OriginatorBlockAckAgreement ()

void	CompleteExchange (void)

bool	IsBlockAckRequestNeeded (void) const
	Returns true if all packets for which a block ack was negotiated have been transmitted so a block ack request is needed in order to acknowledge them. More...

bool	IsEstablished (void) const
	Check if the current state of this agreement is ESTABLISHED. More...

bool	IsInactive (void) const
	Check if the current state of this agreement is INACTIVE. More...

bool	IsPending (void) const
	Check if the current state of this agreement is PENDING. More...

bool	IsUnsuccessful (void) const
	Check if the current state of this agreement is UNSUCCESSFUL. More...

void	NotifyMpduTransmission (uint16_t nextSeqNumber)
	Notifies a packet's transmission with ack policy Block Ack. More...

void	SetState (enum State state)

Public Member Functions inherited from ns3::BlockAckAgreement
	BlockAckAgreement ()

	BlockAckAgreement (Mac48Address peer, uint8_t tid)
	Constructor for BlockAckAgreement with given peer and TID. More...

	~BlockAckAgreement ()

uint16_t	GetBufferSize (void) const
	Return the buffer size. More...

Mac48Address	GetPeer (void) const
	Return the peer address. More...

uint16_t	GetStartingSequence (void) const
	Return the starting squence number. More...

uint16_t	GetStartingSequenceControl (void) const
	Return the starting squence control. More...

uint8_t	GetTid (void) const
	Return the Traffic ID (TID). More...

uint16_t	GetTimeout (void) const
	Return the timeout. More...

bool	IsAmsduSupported (void) const
	Check whether A-MSDU is supported. More...

bool	IsImmediateBlockAck (void) const
	Check whether the current ACK policy is immediate block ACK. More...

void	SetAmsduSupport (bool supported)
	Enable or disable A-MSDU support. More...

void	SetBufferSize (uint16_t bufferSize)
	Set buffer size. More...

void	SetDelayedBlockAck (void)
	Set Block ACK policy to delayed ACK. More...

void	SetImmediateBlockAck (void)
	Set Block ACK policy to immediate ACK. More...

void	SetStartingSequence (uint16_t seq)
	Set starting sequence number. More...

void	SetTimeout (uint16_t timeout)
	Set timeout. More...

Private Attributes
bool	m_needBlockAckReq

uint16_t	m_sentMpdus

enum State	m_state

Friends
class	BlockAckManager

Additional Inherited Members
Protected Attributes inherited from ns3::BlockAckAgreement
uint8_t	m_amsduSupported

uint8_t	m_blockAckPolicy

uint16_t	m_bufferSize

EventId	m_inactivityEvent

Mac48Address	m_peer

uint16_t	m_startingSeq

uint8_t	m_tid

uint16_t	m_timeout

Detailed Description

Maintains the state and information about transmitted MPDUs with ack policy block ack for an originator station.

Definition at line 33 of file originator-block-ack-agreement.h.

Member Enumeration Documentation

enum ns3::OriginatorBlockAckAgreement::State

Represents the state for this agreement.

PENDING: If an agreement is in PENDING state it means that an ADDBARequest frame was sent to recipient in order to setup the block ack and the originator is waiting for the relative ADDBAResponse frame.

ESTABLISHED: The block ack is active and all packets relative to this agreement are transmitted with ack policy set to block ack.

INACTIVE: In our implementation, block ack tear-down happens only if an inactivity timeout occurs so we could have an active block ack but a number of packets that doesn't reach the value of m_blockAckThreshold (see ns3::BlockAckManager). In these conditions the agreement becomes INACTIVE until that the number of packets reaches the value of m_blockAckThreshold again.

UNSUCCESSFUL (not used for now): The agreement's state becomes UNSUCCESSFUL if:

its previous state was PENDING and an ADDBAResponse frame wasn't received from recipient station within an interval of time defined by m_bAckSetupTimeout attribute in ns3::WifiMac.
an ADDBAResponse frame is received from recipient and the Status Code field is set to failure.

In both cases for station addressed by BlockAckAgreement::m_peer and for TID BlockAckAgreement::m_tid block ack mechanism won't be used.