Cisco ASR 5000 series Product Overview page 984

▀ Environmental Information
GTP-P. GTP Prime. The protocol used by the GGSN and SGSN to communicate with the charging gateway.
GTP-U. The GPRS Tunneling Protocol (GTP) for user data plane signalling to handle the user data moving between the
RAN and the Core Network (CN) and within the CN.
GT. See Global Title.
GTT. See Global Title Translation.
Gx interface. The interface used by the GGSN to communicate with Charging Rule Function (CRF). Gx interacts
between GGSN, the TPF (Traffic Plane Function) and the CRF (Charging Rule Function). It is based on the Diameter
base protocol and the Diameter Credit Control Application standard. The GGSN acts as the client where as the CRF
contains the Diameter server functionality.
H
Handoff. The process by which an air interface circuit between a mobile node and the network, including all signalling
and transfer of user information.
Handover. procedure that changes the serving cell of a UE in RRC_CONNECTED.
HAT. High Availability Task. This is a software task that manages the operational state of the system.
Home address. The IP address assigned to the mobile node, making it logically appear attached to its home network.
Home Agent (HA). A node on the home network that effectively causes the mobile node to be reachable at its home
address even when the mobile node is not attached to its home network.
Home PLMN. This is a PLMN where the MCC and MNC of the PLMN identity match the MCC and MNC of the
IMSI.
HLR. Home Location Register. The HLR stores access service parameter information for users belonging to the
particular home network.
Home network. The network at which the mobile node seems reachable, to the rest of the Internet, by virtue of its
assigned IP address.
HRPD Access. Combination of the eAN - PCF of the cdma2000 access.
I
IDL. Interface Definition Language. This refers to the application programming interface used to develop CORBA-
based management interfaces as defined by the Object Management Group (OMG).
IKE. Internet Key Exchange. An IPSec (Internet Protocol Security) mechanism that is used to create SAs (Security
Associations) between two entities in an IP-based VPN (Virtual Private Network).
IMS. IP Multimedia Subsystem. IMS provide a wide application support for transport of voice, video, and data
independent of the access support.
IMSA. IP Multimedia Subsystem Authorization. In case of 3GPP networks this service requires specific support for a
roaming IMS subscriber. Apart from other functionality sufficient, uninterrupted, consistent, and seamless user
experience is required to particular subscriber session for an application. It is also important that the subscriber gets
charged only for the amount of resources consumed by the particular IMS application used.
IMSI. International Mobile Subscriber Identity. Uniquely identifies a subscriber to a mobile telephone service. A 50-bit
field, used in GSM system, that identifies a mobile device's home country and carrier.
Interface. As used in context of system services, an interface is a virtual, or logical, assignment of a virtual router
instance that provides higher-layer protocol transport. Interfaces are bound to physical ports within the system.
Initial NAS message. A NAS message is considered as an initial NAS message, if this NAS message can trigger the
establishment of a NAS signalling connection. For instance, the ATTACH REQUEST message is an initial NAS
message.
▄ Cisco ASR 5000 Series Product Overview
Glossary
OL-22938-02