Unlike 3G (third generation), which is a specific standard for mobile communications, 4G (fourth generation) is a broad spectrum of communications standards and technologies that are constantly undergoing revision and enhancement. This book provides a solid, up-to-the-minute and multifaceted look at the 4G suite of standards, services, and technologies. It explains how wired and wireless network technology, telecommunications and Web services, IP (Internet Protocol), and consumer electronics are converging to create 4G. The book examines the current telecommunications marketplace, where consumer demand is driving the market for 4G applications and services. Professionals find coverage of important 4G concepts like the Adaptive Global-Net (AGN), the key technologies enabling 4G, the architecture of 4G networks, and the design challenges in developing 4G devices.