Ieee80211BasicBlockAck

class

8.3.1.9.2 Basic BlockAck variant -- 411p.

Usage diagram

The following diagram shows usage relationships between types. Unresolved types are missing from the diagram.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Extends

Name	Type	Description
Ieee80211BlockAck	class	8.3.1.9 BlockAck frame format -- 410p.

Fields

Name	Type	Description
chunkLength	b
multiTid	bool	Table 8-18—BlockAck frame variant encoding
compressedBitmap	bool
fragmentNumber	int	??
startingSequenceNumber	SequenceNumber
blockAckBitmap	BitVector[64]	The Block Ack Bitmap subfield is 128 octets in length and is used to indicate the received status of up to 64 MSDUs. Bit position n of the Block Ack bitmap, if equal to 1, acknowledges receipt of an MPDU with an MPDU sequence control value equal to (Block Ack Starting Sequence Control + n). Bit position n of the Block Ack bitmap, if equal to 0, indicates that an MPDU with MPDU sequence control value equal to (Block Ack Starting Sequence Control + n) has not been received. Each of the MPDU Sequence Control field and Block Ack Starting Sequence Control subfield values are treated as a 16-bit unsigned integer. For unused fragment numbers of an MSDU, the corresponding bits in the bitmap are set to 0.
tidInfo	int	The TID_INFO subfield of the BA Control field of the Basic BlockAck frame contains the TID for which this BlockAck frame is sent.
type	Ieee80211FrameType	type and subtype
blockAckPolicy	bool	BA Control
reserved	uint16_t
transmitterAddress	MacAddress	aka address2 (TA)
toDS	bool
fromDS	bool
moreFragments	bool
retry	bool
powerMgmt	bool	unused
moreData	bool	unused
protectedFrame	bool	unused
order	bool	unused
durationField	simtime_t	"duration" in the Duration/ID field (-1=no duration)
AID	short	"id" (Association ID) in the Duration/ID field (-1=no ID)
receiverAddress	MacAddress	aka address1 (RA)
MACArrive	simtime_t	FIXME remove it, technical data, used inside of MAC module
mutable	bool
complete	bool
correct	bool
properlyRepresented	bool
rawBin	string[]
rawHex	string[]
tags	RegionTagSet::cObjectRegionTag[]

Source code

//
// 8.3.1.9.2 Basic BlockAck variant -- 411p.
//
class Ieee80211BasicBlockAck extends Ieee80211BlockAck
{
    chunkLength = LENGTH_BASIC_BLOCKACK - B(4);
    multiTid = 0;
    compressedBitmap = 0;

    // The BA Information field of the Basic BlockAck frame comprises the Block Ack Starting Sequence Control
    // subfield and the Block Ack Bitmap subfield, as shown in Figure 8-26.

    int fragmentNumber = 0; // ??
    SequenceNumber startingSequenceNumber;
    // The Block Ack Bitmap subfield is 128 octets in length and is used to indicate the received status of up to
    // 64 MSDUs. Bit position n of the Block Ack bitmap, if equal to 1, acknowledges receipt of an MPDU with an
    // MPDU sequence control value equal to (Block Ack Starting Sequence Control + n). Bit position n of the
    // Block Ack bitmap, if equal to 0, indicates that an MPDU with MPDU sequence control value equal to
    // (Block Ack Starting Sequence Control + n) has not been received. Each of the MPDU Sequence Control
    // field and Block Ack Starting Sequence Control subfield values are treated as a 16-bit unsigned integer. For
    // unused fragment numbers of an MSDU, the corresponding bits in the bitmap are set to 0.
    BitVector blockAckBitmap[64]; // 64 * 16 bitmatrix

    // The TID_INFO subfield of the BA Control field of the Basic BlockAck frame contains the TID for which
    // this BlockAck frame is sent.
    int tidInfo;
}

File: src/inet/linklayer/ieee80211/mac/Ieee80211Frame.msg