Cisco ASR 5000 series Product Overview page 978

Glossary
▀ Environmental Information
ACO. Alarm Cut Off. This is a toggle switch used to temporarily disable a central office alarm that occurs on a specific
network device.
Acceptable Cell. This is a cell that the MS may camp on to make emergency calls. It must satisfy criteria which are
defined for A/Gb mode in 3GPP TS 43.022 and for Iu mode in 3GPP TS 25.304.
Access Technology. The access technology associated with a PLMN. The MS uses this information to determine what
type of radio carrier to search for when attempting to select a specific PLMN (e.g., GSM, UTRAN, GSM COMPACT or
E-UTRAN). A PLMN may support more than one access technology.
Address resolution. The process of determining the link-layer address of a node whose network-layer address is
known.
AF. See Application Function
Aggregate Maximum Bit Rate. The maximum bit rate that limits the aggregate bit rate of a set of non-GBR bearers of
a UE. The label (E-UTRAN only) indicates this subclause or paragraph applies only if E-UTRAN is used as current
radio access network.
AH. See Authentication Header.
Allowable PLMN. In the case of a MS operating in MS operation mode A or B, this is a PLMN which is not in the list
of "forbidden PLMNs" in the MS. In the case of a MS operating in MS operation mode C, this is a PLMN which is not
in the list of "forbidden PLMNs" or in the list of "forbidden PLMNs for GPRS service" in the MS.
Allowed CSG List.A list of CSG IDs stored in the UE. A UE is able to access only those CSG cells that have a CSG ID
in this list.
Application Function.An Applciation Function is an element offering applications that use IP bearer resources. The AF
is capable of communicating with the CRF to transfer dynamic charging rules related service information. One example
of an AF is the P-CSCF of the IM CN subsystem.
APN. Access Point Name. The APN is a logical name for a packet data network and/or a service that the GGSN
supports access to.
APS. Automatic Protection Switching. A means of achieving network redundancy through using automatic switching
mechanisms to switch from a primary circuit to a pre-defined secondary circuit.
ARP. Address Resolution Protocol. A standard protocol for performing address resolution between IP addresses and
various link-layer addresses.
Agent advertisement. The procedure by which a mobility agent becomes known to the mobile node.
Agent discovery. The process by which a mobile node can obtain the IP address of a home agent or foreign agent,
depending upon whether the mobile node is home or away from home. Agent discovery occurs when a mobile node
receives an agent advertisement, either as a result of periodic broadcast or in response to a solicitation.
ARQ. Automatic Repeat Request. A link layer may automatically retransmit packets that were not correctly received by
the next hop link layer. This improves the robustness of the packet delivery, but comprises the latency and packet
overhead.
ATM. Asynchronous Transfer Mode. A connection-oriented data link layer protocol used in cell relay/packet switch
networks.
Authentication header (AH). Part of IP Security (IPSec) specification. Other IPSec header mechanisms include Diffie-
Hellman, DES, 3DES, and others.
Authorization Token. The authorization token consists of the AF session identifier as well as the PDF identifier. The
AF session identifier is assigned by the P-CSCF on successful IMS session establishment. The authorization token is
sent to the UE by P-CSCF as part of the session establishment. The UE passes the authorization token in the binding
information to the AGW. AGW uses the authorization token to get the PDF to be communicated for policy authorization
and the session identifier is used for the authorization request to indicate the session to which authorization event
belongs.
▄ Cisco ASR 5000 Series Product Overview
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