LSB Window-Based LSB encoding for IP header compression (and decompression) Part of ROHC

W3C World Wide Web Consortium

WAE Wireless Application Environment. See WAP WAG(1) Wireless Applications Group

WAG(2) WLAN Access Gateway

Walsh codes A group of 2N vectors or words which contain 2N binary elements which with themselves and their logical inverses form a mutually orthogonal set.

WAN Wide Area Network. Compare with LAN, MAN

WAP Wireless Application Protocol. A new protocol that is supposed to provide more efficient internet access from wireless phone. See also WML

WAP W3C WAP - W3C Coordination Committee

WAR WLAN Access Router. Manages traffic into and out of a wireless LAN. WARC World Administrative Radio Convention

WASU Wireless Access Subscriber Unit WATM Wireless ATM

WATS Wide Area Telephone Service WAVE See 802.11p

WBMP Wireless Bit MaP. A WAP graphic format WCDMA See W-CDMA

WCMP Wireless Control Message Protocol. Protocol for reporting errors and performing loopback testing in WAP. Based on ICMP

WCTP Wireless Communications Transfer Protocol. An interface between internet applications and messaging service providers (e.g. paging carriers). Developed by wctp.org. See RXP

WDM Optical Wavelength Division Multiplexing WDP Wireless Datagram Protocol. See WAP

WEMT CDMA Wireless Enhanced Messageing Teleservice

WEP Wired Equivalent Privacy. First security system for 802.11 WLAN. Has known security weaknesses in the algorithm and the use of fixed keys. WEP derives a 64 bit RC4 key from a 40 bit AP-specific key and a 24-bit IV that is unique to the session. Compare with WPA

WFQ Weighted Fair Queuing WG Working Group

WGS-84 World Geodetic System 1984

WI Work Item

WID 3GPP WI Description.

WIF Wireless Interconnect Forum (managed by Telcordia) WiFi IEEE 802.11b wireless LAN system

WIG WAP Interoperability Group

WIM WAP Identity Module

WiMax IEEE OFDM radio interface.

WIMS Wireless Multimedia Message Service

WIN Wireless Intelligent Network. Protocol with similar goals as IN, AIN and CAMEL

WIN Phase I Supports voice controlled services, incoming call screening and CNAP/CNAR

WIN Phase II Supports billing-related services, including Prepaid and Freephone (i.e. 1-800, including airtime)

WIN Phase III Supports location-based services, such as location sensitive billing and intelligent directory assistance

WIP WIN Implementation of PAS

WIPP Wireless Internet Protocol Partnership WLA Optical Wavelength Adapter

WLAN Wireless LAN, of which the most popular is WiFi WLL Wireless Local Loop. See FWA

WML Wireless Markup Language. An HTML-like page description and scripting language, that is an essential part of WAP. Compare with cHTML and XHTML

WMLSc WML Script

WNE Wireless Network Entity

WNO Wireless Network Operator. A carrier

WNP Wireless Number Portability. LNP for wireless phones

WNP Phase I The ability for a switch to route to a ported number in another switch WNP Phase II The ability for a switch to allow numbers to be ported in or out of its

number range

WNP Phase III The ability to support services such as short message service in a number portability environment

WP Working Party

WPA WiFi Protected Access. An enhanced version of WEP that does not rely on a static, shared key.

WPAN Wireless Personal Area Network. Standards are being defined by IEEE 802.15

WPG WAP WIreless Protocols Group

WPS Wireless Priority Service. See PACA, PS, NS/EP

Wr Interface between Proxy AAA and WLAN access network. WRE Wireless Residential Extension - home base station

Ws Interface between Proxy AAA and Home system AAA. WSDL Web Service Description Language

WSI Wireless Service Indication

WSP Wireless Session Protocol. See WAP WTA Wireless Telephony Applications

WTAI WTA Interface

WTB US FCC Wireless Telecommunications Bureau WTLS Wireless Transport Layer Security. See WAP WTP Wireless Transaction Protocol. See WAP WWAN Wireless WAN

www World-Wide Web

Wx Interface between AAA and HSS

WZ1 World Zone 1. An obsolete telephone numbering term for countries identified by country code 1 ( USA, Canada and some Caribbean nations)

X.25 An ITU/CCITT defined general purpose packet switching protocol X.500 The ISO directory protocol. See DAP, LDAP, DNS

xDSL Refers to all the DSL variants

XHTML Extensible HTML. A version of HTML defined by XML and designed to be extensible. This may also be the evolutionary path for cHTML and WML

XMAC Expected MAC

XML Extensible Markup Language. A meta-language that can be used to define languages like HTML and WML

XOR Exclusive OR. A boolean operation, often used in cryptography. The exclusive-or of two bits is 1 if they have the same value and 0 if they have different values. This operation has the nice property that no information is lost. For example, (A xor B) xor B = A and (A xor B) xor A = B. Try that on any other boolean operation!

XRES Expected response to authentication challenge. For AKA it is derived from RAND using f2. Compare with AUTHR

XUDT Extended UDT. Supports message segmentation

Y

Z

Z.300 An ITU-T series of specifications related to MML

ZBTSI Zero Byte Time Slot Interchange (TSI). Bits 2 through 193 of each DS1 frame are scrambled to minimize the possibility of an all-zero octet. If all zero octets are still found, a group of all-ones is substituted. Due to its complexity this method is not often used.

ZCS Zero Code Suppression. The seventh bit of an all-0 octet is replaced by a 1-bit. Only applicable to voice because there is no way to remove this one bit error.

ZigBee A 'cable replacement' radio technology. Somewhat a competitor to Bluetooth although it is designed more for M2M applications (home, business and inustrial automation). It claims to be cheaper and use less power. It uses unlicensed bands at 2.4 GHz, 915 MHz (US) or 868 MHz (Europe). Data speeds are 20–250 kbps depending on the frequency band used. The communications range is from 10 to 75 meters. Developed by the ZigBee Alliance and standardized as IEEE 802.15.4

ZRP Zone Routing Protocol. An internet routing protocol that focuses on routing updates within a zone.