A Topology Control Algorithm in Wireless Sensor Networks for IoT-based Applications

Wireless sensor networks (WSN) is a part of an Internet of Things (IoT) in which the sensors connect to an IoT platform via wireless or fixed line networks for specific applications such as e-health environmental monitoring applications or underwater applications. Sensor nodes can perform different tasks such as environmental monitoring and control the WSN configuration which is one of many WSN-based-IoT applications. The sensor nodes connect to the gateway which transmits data to the Internet. It is necessary to maintain the network topology which requires low energy consumption at the sink node and long network lifetime. In order to satisfy the quality of services of WSN-based-IoT, the topology control algorithm allows the sensors to be configured to maintain the communication links as well as reduce interference and packet loss. To this end, we introduce the modified LEACH to discover neighbors and, then, to form into the cluster. The maximum number of cluster members is set to a desired value which is equal to the node degree of cluster head. The modified LEACH algorithm can adapt the changing of the dynamic network; therefore, the node can adaptively change its transmission range to ensure the network connectivity.