wifimac::draftn::ReceptionQueue Class Reference

Queue that stores received compounds that cannot be delivered (yet). More...

#include <draftn/ReceptionQueue.hpp>

Collaboration diagram for wifimac::draftn::ReceptionQueue:

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List of all members.

Public Member Functions
wns::ldk::CompoundPtr	getACK ()
	Returns the pending Block ACK.
const wns::ldk::CompoundPtr	hasACK () const
	Indicates that an Block ACK reply is pending.
const size_t	numPDUs () const
void	processIncomingACKreq (const wns::ldk::CompoundPtr &compound)
	Process the incoming BlockACK request and create the BlockACK reply.
void	processIncomingData (const wns::ldk::CompoundPtr &compound, const unsigned int size)
	Processes the incoming compound and delivers it if it is in-order.
	ReceptionQueue (BlockACK *parent_, BlockACKCommand::SequenceNumber firstSN_, wns::service::dll::UnicastAddress adr_)
const unsigned int	storageSize () const
	~ReceptionQueue ()
Private Types
typedef std::pair < wns::ldk::CompoundPtr, unsigned int >	CompoundPtrWithSize
	Store each compound together with its computed size.
Private Member Functions
void	purgeRxStorage ()
Private Attributes
const wns::service::dll::UnicastAddress	adr
wns::ldk::CompoundPtr	blockACK
const BlockACK *	parent
std::set < BlockACKCommand::SequenceNumber >	rxSNs
std::map < BlockACKCommand::SequenceNumber, CompoundPtrWithSize >	rxStorage
BlockACKCommand::SequenceNumber	waitingForSN

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Detailed Description

The reception queue implements, for each transmitter, the handling of received compounds. Compounds stored due to out-of-order delivery in case of packet errors, until they can be delivered in order or until the transceiver signals that the missing frames are discarded.

Hence, the reception queue implements the receiver functions of the BlockACK FU: processIncoming[Data|ACK] and [has|get]ACK

Definition at line 56 of file ReceptionQueue.hpp.

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Member Typedef Documentation

typedef std::pair<wns::ldk::CompoundPtr, unsigned int> wifimac::draftn::ReceptionQueue::CompoundPtrWithSize [private]

Definition at line 61 of file ReceptionQueue.hpp.

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Constructor & Destructor Documentation

ReceptionQueue::ReceptionQueue	(	BlockACK *	parent_,
		BlockACKCommand::SequenceNumber	firstSN_,
		wns::service::dll::UnicastAddress	adr_
	)

Definition at line 34 of file ReceptionQueue.cpp.

wifimac::draftn::ReceptionQueue::~ReceptionQueue

(

)

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Member Function Documentation

wns::ldk::CompoundPtr ReceptionQueue::getACK

(

)

Definition at line 219 of file ReceptionQueue.cpp.

const wns::ldk::CompoundPtr ReceptionQueue::hasACK

(

)

const

Definition at line 213 of file ReceptionQueue.cpp.

const size_t wifimac::draftn::ReceptionQueue::numPDUs

(

)

const [inline]

Definition at line 105 of file ReceptionQueue.hpp.

void ReceptionQueue::processIncomingACKreq

(

const wns::ldk::CompoundPtr &

compound

)

The BlockACK request contains a SN which indicates the start of the SNs that need to be ack'ed. If compounds are discarded by the transmitter (due to lifetime), this SN is higher than the current waitingSN, and pending frames in the rxQueue can be delivered.

Of course, as a reply the Block ACK reply is created, containing a set of successfully received compound SNs.

Definition at line 136 of file ReceptionQueue.cpp.

void ReceptionQueue::processIncomingData	(	const wns::ldk::CompoundPtr &	compound,
		const unsigned int	size
	)

If the compound's SN matches the current waiting SN, the compound is delivered. Otherwise, either the compound was already received before (SN < waitingSN) or intermediate compounds are missing and the compound has to be stored until they are received successfully (SN > waitingSN). In both cases, the SN is added to the set of received SNs for the next BlockACK reply.

Definition at line 60 of file ReceptionQueue.cpp.

void ReceptionQueue::purgeRxStorage

(

)

[private]

Definition at line 112 of file ReceptionQueue.cpp.

const unsigned int ReceptionQueue::storageSize

(

)

const

Definition at line 46 of file ReceptionQueue.cpp.

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Member Data Documentation

const wns::service::dll::UnicastAddress wifimac::draftn::ReceptionQueue::adr [private]

Definition at line 113 of file ReceptionQueue.hpp.

wns::ldk::CompoundPtr wifimac::draftn::ReceptionQueue::blockACK [private]

Definition at line 117 of file ReceptionQueue.hpp.

const BlockACK* wifimac::draftn::ReceptionQueue::parent [private]

Definition at line 112 of file ReceptionQueue.hpp.

std::set<BlockACKCommand::SequenceNumber> wifimac::draftn::ReceptionQueue::rxSNs [private]

Definition at line 116 of file ReceptionQueue.hpp.

std::map<BlockACKCommand::SequenceNumber, CompoundPtrWithSize> wifimac::draftn::ReceptionQueue::rxStorage [private]

Definition at line 115 of file ReceptionQueue.hpp.

BlockACKCommand::SequenceNumber wifimac::draftn::ReceptionQueue::waitingForSN [private]

Definition at line 114 of file ReceptionQueue.hpp.

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

• modules/dll/wifimac/src/draftn/ReceptionQueue.hpp
• modules/dll/wifimac/src/draftn/ReceptionQueue.cpp