Abstract
The Internet of Things (IoT) is a technology that connects devices, traffic lights, vehicles and other objects for the purpose of connecting and exchanging data. This technology is utilized by Smart Cities, so as to offer many benefits to the state in conjunction with Low Power Wide Area Networks (LPWAN). In this paper, the features of IoT technology, its benefits and its architecture are analyzed. In addition, LPWAN technologies are analyzed, which are divided into those that need a license and those without a license, and how Smart Cities rely on them. An overview of their characteristics and the risks they pose and in which parts of Greece they have been applied. LoRa and NB - IoT technologies are among the top LPWAN technologies and are compared to each other in terms of benefits and weaknesses they may have. Finally, it is analyzed that the NB - IoT technology has been utilized by telecommunication providers in Greece with the aim of improving the lives of employees and citizens.
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