Integrating ZigBee and Sub GHz devices for long range networks

Internet of Things (IoT) is the latest technology in this era of wireless communication, which connects the devices to internet for control and monitoring applications. The complete world is now looking forward to use this technology at cities and in other fields, which make them smart. The main objective of this work is to identify communication modules under sub GHz that can provide coverage in the range of few kilometers under the license free spectrum. A single protocol cannot satisfy all the requirements together. So the advantages of more than one standards/ protocols are combined. Few main standards that help in this requirement are LoRa, Weightless, IEEE802.22, Sub GHz spectrum operation etc. The theoretical analysis of all these standards is presented in this paper. And how the sub GHz technology with the ZigBee protocol can be integrated in order to achieve a better transmission scenario is also described.