This book sets out to provide the theoretical foundation that will enable radio network planners to plan model and optimize radio networks using the findings of state-of-the-art from around the world. It adopts a logical approach, beginning with the background of current status of UMTS radio network technology, before devoting equal coverage to issues of planning, modeling and optimization. This theory-based resource containing prolific illustrative case studies explains the reasons for UMTS radio performance issues and how to use this knowledge base to model, plan and present and future systems to optimize.