wave, 61 Wireless broadband. See WiBro (wireless broadband) VF, 636-638 Wireless communications basics, 549-577 wireless broadband for, 529, 626-627 antennas, 556-560 WMV (Windows Media Video) 9 Advanced Profile, history of, 550-553 impairments, 554-556 Working Group on Internet Governance (WGIG), improving error detection and correction, 36-37 574-575 World Administrative Radio Conference (WARC), overview of, 549-550 553, 599 regulations issues, 553-554 World Summit on the Information Society (WSIS), signal modulation, 560-563 spectrum utilization, 563-577 World Trade Organization (WTO), 35 Index Worldwide Interoperability for Microwave Access. 3G systems, 580, 597-611 See WiMax (Worldwide Interoperability for 4G systems, 581, 612-615 Microwave Access) 5G systems, 614-615 WorldWide Spectrum Efficiency (WWise), 646 5Gystems, 581 WORM (write once, read many times) tags, 676 Beyond 3G systems, 580-581, 611-612 Worms, 374 microwave for, 60-61 WPA (Wi-Fi Protected Access), 647-648 WWise (WorldWide Spectrum Efficiency), 646 WPANs (wireless personal area networks), WWWW (Wireless World Wide Web), 615 660-685 defined, 660 IEEE 802.15.1 (Bluetooth), 661-664 X10 standard, 540, 542-543 IEEE 802.15.3 (WPAN-HR and WPAN-AHR), X.25 packet-switching networks, 98 664-665 declining use of, 220 IEEE 802.15.4 (ZigBee), 670-674 error control in, 218, 219 NFC, 683-685 history of, 219 RFID, 674-683 packet size in, 220 task groups for, 660-661 X.509, 380 use of microwave, 61 xDSL. See DSL (Digital Subscriber Line) UWB, 665-670 XMPP (Extensible Messaging and Presence WRR (Weighted Round Robin), 297 Protocol), 338 WSIS (World Summit on the Information Society), WTO (World Trade Organization), 35 ZigBee, 670-674 WWANs (wireless wide area networks), 579-615 certification program, 674 1G systems, 580, 581-586 devices, 671-672 2:5G systems, 580, 592-597 future of, 673-674 2G systems, 580, 586-592 networks, 672-673 LIDO Telecommunications Essentials' R e-Learning LIDO Telecommunications Essentials LIDO- Part I-Communications Fundamentals The 