Population over the age of 65 is increasing gradually and expected to be double by at end of 2025. Currently health of such population becomes the one of key concern for many countries. To mitigate this issue and burden on doctor, remote health monitoring is the key solution. Thus, this book focus on sensor oriented internet based healthcare system in which doctor can access patient vital information and status any time through personal digital assistance (PDA) device. The idea is simple but its application is difficult. This book provides a new metric of success for global connectivity of healthcare system for Smart Hospital and Smart Home area networks. Book covers the fundamental of e-Healthcare system, IPv6 connectivity over small embedded device, IETF 6lowpan technology, wireless ad-hoc and sensor networks etc. Further extension of this technology for communication between Machines to Machine, User to User, User to Machine makes successful step for future internet.