definitions- 28

space-time block coding (STBC) frame: A frame that is transmitted in a physical layer convergence
procedure (PLCP) protocol data unit (PPDU) that has a nonzero value of the TXVECTOR STBC parameter,
or a frame that is received in a PPDU that has a nonzero value of the RXVECTOR STBC parameter.
staggered preamble: A physical layer convergence procedure (PLCP) preamble in a sounding PLCP
protocol data unit (PPDU) that is not a null data packet (NDP) and that includes one or more Data Long
Training fields (DLTFs) and one or more Extension Long Training fields (ELTFs).
staggered sounding: The use of a sounding physical layer convergence procedure (PLCP) protocol data
unit (PPDU) that is not a null data packet (NDP) and that includes one or more Data Long Training fields
(DLTFs) and one or more Extension Long Training fields (ELTFs).
station (STA) 2G4: A STA that is operating on a channel that belongs to any operating class that has a value
of 25 or 40 for the entry in the “Channel spacing” column and that has a value of 2.407 or 2.414 for the entry
in the “Channel starting frequency” column of any of the tables found in E.1.
station (STA) 5G: A STA that is operating on a channel that belongs to any operating class that has a value
of 20 or 40 for the entry in the “Channel spacing” column and that has a value of 5 for the entry in the
“Channel starting frequency” column of any of the tables found in E.1.
station-to-station link (STSL): A direct link established between two stations (STAs) while associated to a
common access point (AP). This term refers to a generic mechanism that allows direct station-to-station
communication while remaining in the infrastructure mode. Establishment of this type of link includes an
initialization step. The STSL is terminated by specific teardown procedures under the conditions prescribed
in this standard. The only example of this procedure currently specified is direct link established by the
direct-link setup (DLS).
station-to-station link (STSL) master key (SMK): A random value generated by an access point (AP)
during an SMK Handshake. It is used for deriving an STSL transient key (STK).
station-to-station link (STSL) master key (SMK) Handshake: A key management protocol between two
parties that creates a new SMK.
station-to-station link (STSL) master key security association (SMKSA): The context resulting from a
successful STSL master key (SMK) Handshake.
station-to-station link (STSL) transient key (STK): A value that is derived from the STSL master key
(SMK), initiator MAC address (MAC_I), peer MAC address (MAC_P), initiator nonce (INonce), and peer
nonce (PNonce), using the pseudorandom function (PRF). The value is split into as many as five keys, i.e.,
temporal encryption key, two temporal message integrity code (MIC) keys, EAPOL-Key encryption key
(KEK), and EAPOL-Key confirmation key (KCK).
station-to-station link (STSL) transient key security association (STKSA): The context resulting from a
successful 4-Way STSL transient key (STK) exchange.
subscription service provider (SSP) roaming: The act when a station (STA) uses an SSP’s IEEE 802.11
infrastructure, with which the terminal has no direct agreement, based on a subscription and formal
agreement with the STA’s own SSP.
time priority management frame: a management frame that is transmitted using specific frame type
channel access rules.