Wireless Broadband Communication Systems

he theme of the Wireless Broadband Communication Systems (WBCS) is to provide its users a means of radio access to broadband services supported on customer premises networks or offered directly by public fixed networks. WBCS will provide a mobile/movable nonwired extension to wired networks for information rates exceeding 2 Mb/s with applications foreseen in wireless local area network (LAN) or mobile broadband systems. Thus, WBCS will be a wireless extension to the B-ISDN (broad band integrated services digital network). It will be achieved with the transparent transmission of ATM (asynchronous transmission mode) cells. Research and development of WBCS is in progress in North America, Europe, and Japan in the microwave and millimeter-wave bands in order to accommodate the necessary bandwidth. The research in the field of WBCS has drawn a lot of attention because of the increasing role of multimedia and computer applications in communications. There is a major thrust on three research areas, namely, i) microwave and millimeter-wave bands for fixed access in outdoor, public commercial networks; ii) evolution of wireless LANs for in-building systems; and iii) use of LAN technology outdoors rather than indoors. In short, WBCS will provide novel multimedia and video mobile communication services, also related to WCPN (wireless customer premises network) and WLL (wireless local loop) broadband.