The book will examine the concept of 4G fourth generation mobile and provide the reader with in-depth background material to the key technologies and developments including: Wireless LANs, WiMAX, IP developments (eg SIP and Media Independent Handover), IMS (Internet Multimedia Subsystem),and 3G (and its current developments HSDPA and LTE). The book will examine these key technological drivers in light of the commercial propositions what is likely to generate extra revenue or reduce existing costs? The book will look at developments globally and not specifically be UK or Europe centric There are many excellent books on each enabling technology however there is a need for a book that provides an essential summary of the key technologies and issues of 4G in a single volume. The proposed book will discuss 4G, bringing together the technology, the commercial arguments and the latest developments in a single volume. It is intended that the reader is left with a very clear and up-to-date briefing on the future of Mobile in the next 2-5 years.