o environments, possibly including cellular mobile, broadband wireless access, wireless LANs, short-range connectivity, and wired systems. 5G: Intelligent Technologies Our view of future visions would not be complete without at least mentioning that 5G is also on the drawing boards. What we envision beyond 4G is a wireless world with incredible transmission speed and no limitation on access or zone sizes. 5G 5G: Intelligent Technologies should comprise more intelligent technologies that interconnect the entire world without limits, creating a real wireless world-what is sometimes today referred to as the wireless World Wide Web (WWWW). For a truly wonderful example of the future of wireless and mobile communications, be sure to watch the NTT DoCoMo "Vision 2010" video at www.docomo-usa.com/vision2010/ It will open your eyes to a range of applications and usages you've not yet considered, and it will hope- fully help you understand just how much new technology still needs to be intro- duced before we can truly call ourselves a mobile society. This page intentionally left blank Chapter WMANs, WLANs, and WPANs Today's consumer appetite for wireless broadband and the high-bandwidth applica- tions it supports-such as photos, games, and video-is enormous. However, the demands placed on a network to support these advanced applications create a tech- nology dilemma for today's network equipment makers and wireless carriers. Among the issues is the question of how an already scarce spectrum can carry more bandwidth-intensive data and multimedia services and do so more economically and reliably. This chapter explores the developments, standards, and deployments in wireless metropolitan area networks (WMANs), wireless local area networks (WLANs), and wireless personal area networks (WPANs), which are all critical to enabling the wireless society the public is hungry for. The next wave of personal productivity is all about mobility-being able to get access anywhere, anytime-which is driving the demand for wireless access. Pe