"Wireless sensor network (WSN) is an area of huge research interest attracting attention from academic and industrial for its own potential and its inherent challenges.This book delivers a comprehensive review of the state of art related to the most important technological (Cross layer)issues in WSN.This wide ranging of reader-friendly text covers topics such as software platform,radio technologies and network aspects.Each of these categories and it identities innovations considered most interesting for future research. FEATURES: 1.Comprehensive overview of the state of the art of Wireless sensor network(WSN)) from software to applications. 2.Include different routing protocols and its implementing 3.Analyses MAC layer issues for effective B.W utilization and network layer for Fast packet delivering. 4.Organized into self contained chapters allowing readers to focus in their specific interests. Complete, cutting edge and resulting from the work of many known researchers ,this book is an in valuable reference guide for graduate students, researchers and practitioners who want to grasp the main technological challenges that drive the design and development of a WSN".