 dispersion, 53-4 technology, 177 Waveguides, 44 voice compression, 178 Web Ontology Language (OWL), 125 voice switching requirements, 178-9 Weighted Fair Queuing (WFQ), 196, 197 Voice over IP (VoIP), 168, 179 Wi-Fi devices, 7, 413, 414, 434, 435-6 bandwidth, 179, 182-3 Wi-Fi PHY (802.11b), 394-6 delay, 181 Wi-Fi Protected Access (WPA), 403 jitter, 184 Wide area mobile systems, 4, 7 latency, 185-6 cellular, 8 manageability, 183-4 mobile satellite services, 7 market size, 180-82 paging systems, 7 new services, 179-81 specialized private systems, 7-8 packet loss, 181-82 terrestrial packet systems, 8 progressive deployment, 180 Wide area networks (WANs), 157, 160, 190, 384 quality of service (QoS), 186-7 Wideband code division multiple access (WCDMA), 260-1, technology, see VoIP technology 271, 280 voice packet prioritization, 184-5 evolution, 305-11 Voice services, 8 overall architecture, 306-8 Voice switching, 172-3, 175-6 physical layer, 308-10 Voice traffic characteristics, 160 resource handling and packet-data session, 311 convergence technologies, 162-4 Wideband fading prediction, 369-70 data, addition of, 161-62 Wideband short-term fading, 356-9 Index Wider bandwidth, 280-82 Wireless sensor networks, 247 Wired equivalent privacy (WEP), 401, 402, 414 advantages, 250 Wireless communication, short history of, 3 detection advantage, 251 Wireless local area networks (WLANs), 383, 413 energy advantage, 250-51 802.11 WLANs, 386 application, 251 802.11 (In) Security, 401-3 habitat monitoring, 251-53 802.11 alphabet soup, 392-4 smart transportation, 254-5 802.11 architecture, 387, 388 tracking chemical plumes, 253 802.11 classic direct-sequence PHY, 389-92, 393 collaborative processing, 255 802.11a PHY, 396-9, 400 constraints and challenges, 247-50 802.11g PHY, 399-400 key definitions, 255-6 MAC and CSMA/CA, 387-9 wxWidgets, 110 Wi-Fi PHY (802.11b), 394-6 HiperLAN and HiperLAN, 2, 403-4 xvYCC color space, 474 HIPERLAN/2, 424 HomeRF Working Group, 414 Yagi-Uda array, 28-9 from LANs, 385-6 YCbCr color space: LANs to PAN