What will the future of wireless communications look like? What drives mobile communications systems beyond 3G? In Next Generation Mobile Systems the authors answer these questions and others surrounding the new technology. This book discusses current research issues driving the wireless world and provides an inclusive overview of how established technologies will evolve according to next-generation mobile systems. Next Generation Mobile Systems: Covers the evolution of IP-based systems and IP mobility. This valuable resource will provide communications engineers, telecommunications managers and researchers in industry and academia with a sound understanding of the future direction of mobile technology.