DEFINITION - 23

high-throughput (HT) physical layer convergence procedure (PLCP) protocol data unit (PPDU): A
Clause 20 PPDU with the TXVECTOR FORMAT parameter equal to HT_MF or HT_GF.
high-throughput (HT) station (STA) 2G4: An HT STA that is also a STA 2G4.
high-throughput (HT) station (STA) 5G: An HT STA that is also a STA 5G.
individually addressed bufferable unit (BU): An individually addressed MSDU, individually addressed
A-MSDU (HT STAs only) or individually addressed bufferable MMPDU.
interworking service: A service that supports use of an IEEE 802.11 network with non-IEEE 802.11
networks. Functions of the interworking service assist non-access-point (non-AP) stations (STAs) in
discovering and selecting IEEE 802.11 networks, in using appropriate quality-of-service (QoS) settings for
transmissions, in accessing emergency services, and in connecting to subscription service providers (SSPs).
key counter: A 256-bit (32-octet) counter that is used in the pseudorandom function (PRF) to generate
initialization vectors (IVs). There is a single key counter per station (STA) that is global to that STA.
key data encapsulation (KDE): Format for data other than elements in the EAPOL-Key Data field.
key management service: A service to distribute and manage cryptographic keys within a robust security
network (RSN).
mesh awake window: A period of time during which the mesh station (STA) operates in awake state after
its Beacon or Probe Response frame transmission that contained the Mesh Awake Window element.
mesh coordination function (MCF): A coordination function that combines aspects of the contentionbased
and scheduled access methods. The MCF includes the functionality provided by both enhanced
distributed channel access (EDCA) and MCF controlled channel access (MCCA).
mesh coordination function (MCF) controlled channel access (MCCA): A coordination function for the
mesh basic service set (MBSS).
mesh coordination function (MCF) controlled channel access opportunity (MCCAOP): A period of
time scheduled for frame transmissions between mesh stations (STAs) using MCF controlled channel access
(MCCA).
Mesh Data frame: An individually addressed Data frame with both the From DS and To DS bits set to 1
and that is transmitted from a mesh station (STA) to a peer mesh STA, or a group addressed Data frame that
has From DS set to 1 and To DS set to 0 that is transmitted by a mesh STA.
Michael: The message integrity code (MIC) for the Temporal Key Integrity Protocol (TKIP).
minimum downlink transmission time (DTT) to uplink transmission time (UTT) [DTT2UTT] spacing:
The minimum time within a power save multi-poll (PSMP) sequence between the end of a station’s (STA’s)
PSMP-DTT and the start of its PSMP-UTT.
modulation and coding scheme (MCS): A specification of the high-throughput (HT) physical layer (PHY)
parameters that consists of modulation order (e.g., BPSK, QPSK, 16-QAM, 64-QAM) and forward error
correction (FEC) coding rate (e.g., 1/2, 2/3, 3/4, 5/6).
modulation and coding scheme 32 (MCS 32) format: A physical layer convergence procedure (PLCP)
protocol data unit (PPDU) format of the high-throughput (HT) physical layer (PHY) in which signals in two