Cisco ASR 5000 Series, Обзор продукта

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Glossary
▀ Environmental Information
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
M-CDR. Mobility management CDR is generated by an SGSN.
Minimal encapsulation. A variant encapsulation technique specified in RFC 2003 that temporarily alters the structure
of the original IP header, but uses fewer bytes for tunneling packets to the care-of-address than the default method (IP-
in-IP) uses.
MME . Mobility Management Entity. An EPS element which manages mobility in EPC network.
MME area . An area containing tracking areas served by an MME.
MME Pool Area . An MME Pool Area is defined as an area within which a UE may be served without need to change
the serving MME. An MME Pool Area is served by one or more MMEs ("pool of MMEs") in parallel. MME Pool Areas
are a collection of complete Tracking Areas. MME Pool Areas may overlap each other.
Mobile IP. A protocol used to provide IP mobility to IPv4-based nodes, defined in RFC-2002).
MNSRID. Mobile Node Session Reference ID. Denotes the calling number of the MN (i.e. the number that the call is
being made from).
Mobile Node (MN). An MN is any device, handset, personal digital assistant, laptop, that connects to the Internet using
wireless technology. A node that, as part of normal use, changes its point of attachment to the Internet. Also referred to
as Mobile Station (MS).
Mobile Station (MS). See Mobile Node.
Mobility. The ability of a mobile node to change its point-of-attachment from one link to another while maintaining all
existing communications and using only its IP home address.
Mobility Agent. A node (typically, a router) that offers support services to mobile nodes. A mobility agent can be either
a Home Agent (HA) or a Foreign Agent (FA).
MSC. Mobile Switching Center. The MSC switches MS-originated or MS-terminated traffic. An MSC is usually
connected to at least one base station. It may connect to other public networks PSTN, ISDN, etc., other MSCs in the
same network. Another name used to identify the MSC is the Mobile Telephone Switching Office (MTSO). The MSC
provides the interface for user traffic between the wireless network and other public switched networks, or other MSCs.
MSID. Mobile Station Identification. The Mobile Station ID is the number used to identify a specific mobile device.
MTBF . Mean Time Between Failure. Synonymous with MTTF, this is the anticipated time between failures of the same
component.
MTTF . Mean Time To Failure. The average interval of time that a component will operate before failing.
MTTR . Mean Time To Repair. The average amount of time needed to repair or replace a component, recover a system,
or otherwise restore service after a failure.
N
NAI. Network Address Identifier. Used to create a new unique subscriber identifier, based on ESN or other identifiers,
when a subscriber enters the network without a user name.
NAS signalling connection recovery . It is a mechanism initiated by the NAS to restore the NAS signalling connection
on indication of "RRC connection failure" by the lower layers.
NAS signalling connection . It is a peer to peer S1 mode connection between UE and MME. A NAS signaling
connection consists of the concatenation of an RRC connection via the "LTE-Uu" interface and an S1AP connection via
the S1 interface. The UE considers the NAS signalling connection established when the RRC connection has been
established successfully. The UE considers the NAS signalling connection released when the RRC connection has been
released.
Network Type . The network type associated with HPLMN or a PLMN on the PLMN selector. The MS uses this
information to determine what type of radio carrier to search for when attempting to select a specific PLMN. A PLMN
may support more than one network type.