Abbreviations List


Overview

This list contains the main abbreviations used throughout this book. First the general list is given and then the QoS Classes, the MAC management messages and the security abbreviations list.

3G

  

Third-generation cellular system. Examples: UMTS and cdma2000

AAA

  

Authentication Authorisation and Accounting. Protocol realising these three functions. Often related to an AAA server

AAS

  

Adaptive Antenna Systems. The WiMAX MAC Layer has functionalities that allow the use of AAS

ACK

  

ACKnowledge or ACKnowledgement. Control message used in the ARQ mechanism

AMC

  

Adaptive Modulation and Coding

ARCEP

  

(French telecommunications regulation authority) Autorité de Régulation des Communications Electroniques et des Postes. Old name: ART (Autorité de Régulation des Télécommunications)

ARQ

  

Automatic Repeat reQuest. Layer two transmission protocol

ASN

  

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

ASN-GW

  

ASN Gateway. ASN equipment, between BSs and CSN

ASP

  

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

ATM

  

Asynchronous Transfer Mode

BE

  

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

BER

  

Bit Error Rate

BF

  

Beamforming. Adaptive Antenna Systems technology

BPSK

  

Binary Phase Shift Keying. Binary digital modulation

BR

  

Bandwidth Request

BS

  

Base Station

BSID

  

Base Station IDentifier

BSN

  

Block Sequence Number. Used in Selective ACK variant of the ARQ mechanism

BTC

  

Block Turbo Code. Turbo coding variant

BW

  

Bandwidth

BWA

  

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

CALEA

  

Communications Assistance Law Enforcement Act

CBR

  

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

CC

  

Convolution Code

CDMA

  

Code Division Multiple Access

CID

  

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

CINR

  

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

CLEC

  

Competitive Local Exchange Carrier. New Operator

CP

  

Cyclic Prefix. See OFDM theory

CPE

  

Consumere Premises Equipment. User equipment

CPS

  

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

CQI

  

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

CQICH

  

Channel Quality Information CHannel. The BS may allocate a CQICH subchannel for channel state information fast-feedback

CRC

  

Cyclic Redundancy Check

CS

  

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

CSN

  

Connectivity Service Network (cf. Architecture WiMAX). Set of network functions that provide IP connectivity service to the WiMAX subscriber (s). A CSN may comprise network elements such as routers, AAA proxy/servers, user databases and interworking gateway devices

CT2/CAI

  

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

CTC

  

Convoutional Turbo Code. Turbo coding variant

DAMA

  

Demand Assigned Multiple Acess

DC

  

Direct Current

DCD

  

Downlink Channel Descriptor. Downlink Descriptor MAC Management message

DECT

  

Digital Enhanced Cordless Telecommunications. Cordless phone system

DFS

  

Dynamic Frequency Selection

DHCP

  

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

DIUC

  

Downlink Interval Usage Code. Burst profile identifier, accompanying each downlink burst

DL

  

DownLink

DLFP

  

DownLink Frame Prefix. Position and burst profile of the first downlink burst are provided in DLFP. DLFP is in FCH

DL-MAP

  

DownLink MAP. MAC Management message, transmitted at the beginning of a downlink frame, indicating its contents

DNS

  

Domain Name System

DSL

  

Digital Subscriber Line

EC

  

Encryption Control. Generic Header bit

EIRP

  

Equivalent Isotropic Radiated Power

EKS

  

Encryption Key Sequence. Generic Header field

ertPS

  

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

FA

  

Foreign Agent

FBSS

  

Fast BS Switching. Fast make-before-break handover

FCH

  

Frame Control Header. Downlink frame header

FDD

  

Frequency Division Duplexing

FEC

  

Forward Error Correction. Channel coding

FFT

  

Fast Fourier Transform. Matrix computation that allows the discrete Fourier transform to be computed (while respecting certain conditions)

FSN

  

Fragment Sequence Number

FTP

  

File Transfer Protocol

FUSC

  

Full Usage of the SubChannels. OFDMA Permutation mode

GMH

  

Generic MAC Header

GSM

  

Global System for Mobile communication. Second-generation cellular system

HA

  

Home Agent

HARQ

  

Hybrid Automatic Repeat reQuest. Evolution of ARQ protocol. Sometimes denoted H-ARQ

HCS

  

Header Check Sequence

H-FDD

  

Half-duplex FDD

HLR

  

Home Location Register

H-NSP

  

Home NSP

HO

  

HandOver

HT

  

Header Type. MAC header bit

HUMAN

  

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

IE

  

Information Element. Element of a MAC message. For example, a DL-MAP_IE describes one burst profile

IEEE

  

Institute of Electrical and Electronics Engineers

IETF

  

Internet Engineering Task Force

IFFT

  

Inverse Fast Fourier Transform. OFDM theory shows that an IFFT operation application leads to orthogonal frequencies (also called subcarriers or tones)

ILEC

  

Incumbent Local Exchange Carrier

IMS

  

IP Multimedia Subsystem

IP

  

Internet Protocol

ISM

  

Industrial, Scientific and Medical. Appellation of the unlicensed 2.4 GHz frequency bandwidth

IUC

  

Interval Usage Code. See DIUC and UIUC

LDPC

  

Low-Density Parity Check code. Channel coding

LEN

  

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

LoS

  

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

LTE

  

Long-Term Evolution. Evolution of the 3G system

MAC

  

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

MAC

  

Message Authentication Code. The ciphertext Message Authentication Code, also known as MAC, must not be confused with the Medium Access Layer, MAC. Except in Section 15.4, MAC is used for the Medium Access Control Layer

MAN

  

Metropolitan Area Network. IEEE 802.16 is a Wireless MAN system

MBS

  

Multicast and Broadcast Services feature

MCS

  

Modulation and Coding Scheme

MDHO

  

Macro Diversity HandOver. A state where the mobile communicates with more than one BS

MIB

  

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

MIMO

  

Multiple-Input Multiple-Output

MIP

  

Mobile IP

MMDS

  

Multichannel Multipoint Distribution Service

MPDU

  

MAC PDU

MS

  

Mobile Station

MSDU

  

MAC SDU

NACK

  

Non-ACKnowledge or Non-Acknowledgement. Control message used in the ARQ mechanism

NAP

  

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

NLoS

  

Non-Line-of-Sight. A radio transmission is NLoS if it do not fulfil certain conditions (Fresnel zone sufficiently clear)

nrtPS

  

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

NSP

  

Network Service Provider (cf. Architecture WiMAX). Business entity that provides IP connectivity and WiMAX services to WiMAX subscribers

NWG

  

NetWork Group. WiMAX Forum Group. In charge of creating the high-level architecture specifications

OEM

  

Original Equipment Manufacturer

OFDM

  

Orthogonal Frequency Division Multiplexing. Transmission technique. The principle is to transmit the information on many orthogonal frequency subcarriers

OFDMA

  

Orthogonal Frequency Division Multiple Access. OFDM used as a multiple access scheme

OPUSC

  

Optional PUSC

PAPR

  

Peak-to-Average Power Ratio. In an OFDM transmission, the PAPR is the peak value of transmitted subcarriers to the average transmitted signal

PBR

  

PiggyBack Request. Grant Management subheader field indicating the uplink bandwidth requested by the SS

PCM

  

Pulse Coded Modulation. Classical phone signal transmission system. Variants are TI and E1

PDU

  

Protocol Data Unit

PHS

  

Payload Header Suppression. Optional CS sublayer process

PHSF

  

Payload Header Suppression Field

PHSI

  

Payload Header Suppression Index

PHSM

  

Payload Header Suppression Mask

PHSS

  

Payload Header Suppression Size

PHSV

  

Payload Header Suppression Valid

PHY

  

PHYsical layer

PICS

  

Protocal Implementation Conformance Specification document. In the conformance test, the BS/SS units must pass all mandatory and prohibited test conditions called out by the test plan for a specific system profile.

PM

  

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

PMP

  

Point-to-MultiPoint. Basic WiMAX topology

PN

  

Pseudo-Noise sequence

PRBS

  

Pseudo-Random Binary Sequence. Used in the randomisation block

PS

  

Physical Slot. Function of the PHYsical Layer. Used as a resource attribution unit

PUSC

  

Partial Usage of SubChannels. OFDMA Permutation mode

QAM

  

Quadrature Amplitude Modulation

QoS

  

Quality of Service

QPSK

  

Quadrature Phase Shift Keying

RF

  

Radio Frequency

RFC

  

Request For Comment. IETF document

RRA

  

Radio Resource Agent

RRC

  

Radio Resource Controller

RRM

  

Radio Resource Management

RS

  

Reed-Solomon code. Channel coding

RSSI

  

Received Signal Strength Indicator. Indicator of the signal-received power level

RTG

  

Receive/transmit Transition Gap. The RTG is a gap between the uplink burst and the subsequent downlink burst in a TDD transceiver

RTP

  

Real-Time Protocol

rtPS

  

Real-time Polling Services. One of the Five QoS classes of WiMAX

SAP

  

Service Access Point

SBC

  

SS Basic Capability. The BS and the SS agree on the SBC at SS network entry

SC

  

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

SDU

  

Service Data Unit

SFA

  

Service Flow Authorisation

SFID

  

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

SFM

  

Service Flow Management

SI

  

Slip Indicator. Grant Management subheader field. Indicates slip of uplink grants relative to the uplink queue depth

SISO

  

Single-Input Single-Output. Specific Case of MIMO

SLA

  

Service Level Agreements

SM

  

Spatial Multiplexing. MIMO family of algorithms

SN

  

Sequence Number. Transmitted block number used in the ARQ mechanism

SNMP

  

Simple Network Management Protocol. IETF Network Management Reference model protocol

SNR

  

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

SOFDMA

  

Scalable OFDMA

SPID

  

SubPacket IDentifier. Used in the HARQ process

SS

  

Subscriber Station

STBC

  

Space Time Block Coding. MIMO variant

STC

  

Space Time Coding. MIMO variant

TCP

  

Transmission Control Protocol

TCS

  

Transmission Convergence Sublayer. Optional PHY mechanism

TDD

  

Time Division Duplexing

TDM

  

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

TFTP

  

Trivial File Transfer Protocol

TLV

  

Type/Length/Value

TO

  

Transmission Opportunity

TTG

  

Tx/Rx Transition Gap. Time gap between the downlink burst and the subsequent uplink burst in the TDD mode

TUSC

  

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

UDP

  

User Datagram Protocol

UDR

  

Usage Data Records

UCD

  

Uplink Channel Descriptor. Uplink Descriptor MAC Management message

UGS

  

Unsolicited Grant Services. One of the five QoS classes of WiMAX

UIUC

  

Uplink Interval Usage Code. Burst profile identifier, accompanying each uplink burst

UL

  

UpLink

UL-MAP

  

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

UTC

  

Universal Coordinated Time

V-NSP

  

Visited NSP

VoIP

  

Voice over IP

WiFi

  

Wireless Fidelity. IEEE 802.11 certification consortium

WiMAX

  

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

WLL

  

Wireless Local Loop. Cordless phone system




WiMAX. Technology for Broadband Wireless Access
WiMAX: Technology for Broadband Wireless Access
ISBN: 0470028084
EAN: 2147483647
Year: 2007
Pages: 124

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