01345nas a2200145   4500008004100000245006100041210006000102300001200162520080600174100002100980700002201001700002601023700002701049856012301076       2020                        eng d00aSearch and Rescue System Based on NB-IoT Wearable Device0 aSearch and Rescue System Based on NBIoT Wearable Device  a195-2223 aThis chapter presents the design and development of a search and rescue (SAR) system, for the location and provision of aid to people who are missing or in imminent danger, especially those belonging to population groups with a particularly high probability of getting lost. With the use of Low-Power Wide Area Network (LPWAN) technology, such as Narrow Band Internet of Things (NB-IoΤ), authors are able to provide search and rescue solutions for individuals, especially those belonging to groups of people who are more likely to get lost. The central part of the system is a modular “wearable (portable)” device, while in the framework of the implementation of this system authors have seriously taken into consideration the aspects of energy efficiency in order to provide better battery life.1 aBouras, Christos1 aGkamas, Apostolos1 aKatsampiris, Spyridon1 aPapachristos, Nikolaos  uhttp://telematics.upatras.gr/telematics/publications/search-and-rescue-system-based-nb-iot-wearable-device?language=en