This book investigates energy managementapproaches for energy efficient or energy-centric system design andarchitecture and presents end-to-end energy management in the recentheterogeneous-type wireless network medium. It also considers energy managementin wireless sensor and mesh networks by exploiting energy efficient transmissiontechniques and protocols. and explores energy management in emergingapplications, services and engineering to be facilitated with 5G networks suchas WBANs, VANETS and Cognitive networks. A special focus of the book is on theexamination of the energy management practices in emerging wireless cellularand ad hoc networks. Considering the broad scope of energy management inwireless cellular and ad hoc networks, this book is organized into six sectionscovering range of Energy efficient systems and architectures; Energy efficienttransmission and techniques; Energy efficient applications and services.