A-B

access location entity (ALE)

The ALE is responsible for the provision of location measurements to a LIS.

access network (AN)

In EVDO networks, the AN acronym refers to the radio segment and the elements that support the radio segment.

access point (AP)

In 802.11, an access point is a term used to refer to an infrastructure node.

See also Wireless Fidelity (WiFi).

Address of Record (AOR)

See Session Initiation Protocol (SIP).

Address Resolution Protocol (ARP)

ARP provides a protocol for discovering the binding between network and hardware addresses, most often between IP and Ethernet addressing.

application service provider (ASP)

The provider of higher-level network services as e-mail, web servers, and voice services.

Assisted GNSS (A-GNSS)

A-GNSS is a means of using GNSS systems where the target host receives assistance data to help with signal acquisition and calculations.

Assisted GPS (A-GPS)

See Assisted GNSS (A-GNSS).

Asymmetric Digital Subscriber Line (ADSL)

See Digital Subscriber Line (DSL).

Asynchronous Transfer Mode (ATM)

ATM is a link layer protocol that uses very small frames (53 bytes) and predetermined routes, which allow for efficient switching.

Authentication Authorization Accounting (AAA)

AAA is a service that manages access control and billing for network access. Typically, this service is centralized and accessed using a standardized protocol, such as RADIUS or DIAMETER.

automatic location identification (ALI)

A database system used in North American emergency services that provides location information to a PSAP based on.

automatic number identification (ANI)

The number used to query an ALI system in order to obtain location information.

Base Station Controller (BSC)

In both CDMA and GSM networks, the BSC manages the radio resources of a number of BTSs.

Base Station Subsystem Application Part (BSSAP)

BSSAP is a protocol layer in the GSM RAN. A location protocol, BSSAP with Location Extensions (BSSAP-LE) uses this protocol.

Base Transceiver Station (BTS)

A BTS is the name given to the radio transceiver in many cellular networks. UMTS uses the name Node B.

Blocks Extensible Exchange Protocol (BEEP)

BEEP is a protocol framework that provides a common framing and streaming mechanism for the use of other protocols.

Border Gateway Control Function (BGCF)

See IP Multimedia Subsystem (IMS).

Bootstrap Protocol (BOOTP)

See Dynamic Host Configuration Protocol (DHCP).

Broadband Remote Access Server (BRAS)

A BRAS is the name given to the aggregating node in some DSL configurations.