DEFINITIONS - 9

location configuration information (LCI): As defined in IETF RFC 3825: includes latitude, longitude, and
altitude, with resolution indicators for each.
location subject local: The term used when a location request is for the location of the requesting STA, i.e.,
when the requesting STA asks, “Where am I?”
location subject remote: The term used when a location request is for the location of the reporting STA,
i.e., when the requesting STA asks, “Where are you?”
location subject third party: The term used when the location request is for the location of a station (STA)
other than the requesting STA or the requested STA, (i.e., when the requesting STA asks, “Where is he/
she?”)
master session key (MSK): Keying material that is derived between the Extensible Authentication Protocol
(EAP) peer and exported by the EAP method to the Authentication Server (AS).
NOTE—In this standard, this key is at least 64 octets in length.
medium access control (MAC) management protocol data unit (MMPDU): The unit of data exchanged
between two peer MAC entities, using services of the physical layer (PHY), to implement the MAC
management protocol.
medium access control (MAC) protocol data unit (MPDU): The unit of data exchanged between two peer
MAC entities using the services of the physical layer (PHY). Syn: frame.
medium access control (MAC) service data unit (MSDU): Information that is delivered as a unit between
MAC service access points (SAPs).
mesh basic service set (MBSS): A basic service set (BSS) that forms a self-contained network of mesh
stations (STAs) that use the same mesh profile. An MBSS contains zero or more mesh gates, and can be
formed from mesh STAs that are not in direct communication.
mesh facility: The set of enhanced functions, channel access rules, frame formats, mutual authentication
methods, and managed objects used to provide data transfer among autonomously operating stations (STAs)
that might not be in direct communication with each other over a single instance of the wireless medium.
Communication between STAs using the mesh facility takes place using only the wireless medium. The
mesh facility transports an MSDU between source and destination STAs over potentially multiple hops of
the wireless medium without transiting the MAC_SAP at intermediate STAs.
mesh gate: Any entity that has mesh station (STA) functionality and provides access to one or more
distribution systems, via the wireless medium (WM) for the mesh basic service set (MBSS).
mesh link: A link from one mesh station (STA) to a neighbor mesh STA that have a mesh peering with each
other.
mesh neighborhood: The set of all neighbor mesh stations (STAs) relative to a particular mesh STA.
mesh path: A concatenated set of mesh links from a source mesh station (STA) to a destination mesh STA.
mesh path selection: The process of selecting a mesh path.
mesh peer service period (MPSP): A contiguous period of time during which one or more individually
addressed frames are transmitted between two peer mesh stations (STAs) with at least one of those mesh
STAs operating in light sleep or deep sleep mode. A mesh peer service period is directional and may contain
one or more transmission opportunities (TXOPs). A mesh STA may have multiple mesh peer service

periods ongoing in parallel. No more than one mesh peer service period may be set up in each direction with
each peer mesh STA.