Third-generation cellular system. Examples: UMTS and cdma2000

ACKnowledge or ACKnowledgement. Control message used in the ARQ mechanism

Adaptive Modulation and Coding

Access Service Network. The WiMAX radio access network, mainly composed of BSs and ASN-GW

Application Service Provider. Business entity that provides applications or services via (Visited) V-NSP or (Home) H-NSP

Best Effort. BE is one of the five QoS classes of WiMAX. Used for lowest priority time-constraint services such as email

Bandwidth

Broadband Wireless Access. High data rate radio access. WiMAX is a BWA

Constant Bit Rate. Data transmission service type (e.g. non-optimised voice)

Convolution Code

Code Division Multiple Access

Connection IDentifier. A 16-bit identification of a MAC connection

Carrier-to-Interference-and-Noise Ratio. Also known as the SNR (Signal-to-Noise Ratio)

Consumere Premises Equipment. User equipment

Common Part Sublayer. Middle part of the IEEE 802.16 MAC Layer

Channel Quality Information. A CQI is transmitted on a CQI channel

Convergence Sublayer. Higher part of the IEEE 802.16 MAC Layer. The Service-Specific Convergence Sublayer (CS) realises the transformation and/or the mapping of external network data before its transmission on a 802.16 radio link

Cordless Telephone 2/Common Air Interface. Digital WLL cordless phone system

Dynamic Host Configuration Protocol. The DHCP server provides the DHCP client with configuration informations, in particular, an IP address

Domain Name System

Encryption Key Sequence. Generic Header field

Extended real-time Polling Service. New QoS class added by the 802.16e amendment

Foreign Agent

Fast BS Switching. Fast make-before-break handover

Frame Control Header. Downlink frame header

Frequency Division Duplexing

Fragment Sequence Number

Generic MAC Header

Global System for Mobile communication. Second-generation cellular system

Header Check Sequence

Home Location Register

HandOver

High-speed Unlicensed Metropolitan Area Network. Free license 802.16 specification

Internet Engineering Task Force

Low-Density Parity Check code. Channel coding

LENgth. Length in bytes of a MAC PDU. Includes the MAC header and, if present, the CRC

Line-of-Sight. A radio transmission is LoS if it fulfills certain conditions (Fresnel zone sufficiently clear)

Long-Term Evolution. Evolution of the 3G system

Media Access Control Layer. Part of Layer 2 of the OSI Networks Model

Multicast and Broadcast Services feature

Management Information Base. The BS and SS managed nodes collect and store the managed objects in an 802.16 MIB format

Multiple-Input Multiple-Output

MAC PDU

MAC SDU

Network Access Provider (cf. Architecture WiMAX). Business entity that provides a WiMAX radio access infrastructure to one or more WiMAX Network Services

Non-real-time Polling Services. One of the five QoS classes of WiMAX

Original Equipment Manufacturer

Protocol Data Unit

Payload Header Suppression. Optional CS sublayer process

Payload Header Suppression Field

Payload Header Suppression Index

Payload Header Suppression Mask

Poll-Me bit. SSs with currently active UGS connections may set the PM bit (in the Grant Management subheader) in a MAC packet of the UGS connection to indicate to the BS that they need to be polled to request bandwidth for non-UGS connections

Point-to-MultiPoint. Basic WiMAX topology

Pseudo-Noise sequence

Pseudo-Random Binary Sequence. Used in the randomisation block

Partial Usage of SubChannels. OFDMA Permutation mode

Quadrature Amplitude Modulation

Quadrature Phase Shift Keying

Radio Frequency

Real-Time Protocol

Service Access Point

Single Carrier. A single carrier transmission is a transmission where no OFDM is applied

Service Data Unit

Service Flow Authorisation

Service Flow IDentifier. An MAC service flow is identified by a 32-bit SFID

Service Flow Management

Service Level Agreements

Simple Network Management Protocol. IETF Network Management Reference model protocol

Signal-to-Noise Ratio. The noise includes interferer signals. Also known as CINR (Carrier-to-Interference-and-Noise Ratio)

Space Time Block Coding. MIMO variant

Time Division Multiplexing. A TDM burst is a contiguous portion of a TDM data stream using the same PHY parameters. These parameters remain constant for the duration of the burst. TDM bursts are not separated by gaps or preambles

Tile Usage of SubChannels. OFDMA Permutation mode. Two variants: TUSC1 and TUSC2

UpLink

UpLink MAP. The MAC Management message indicating the contents of an uplink frame

Universal Coordinated Time

Visited NSP

Worldwide Interoperability for Microwave Access Forum. The WiMAX Forum provides certification of conformity, compatibility and interoperability of IEEE 802.16 products. In extension WiMAX is also the common name for the technology mainly based on IEEE 802.16

Wireless Local Loop. Cordless phone system