Hexagonal grid-based data collection in Heterogeneous Sensing WSNs

In today’s world, wireless sensor networks (WSNs) have a wide range of applications like waste management, fire detection, and health care. WSNs consist of low-power wirelessly connected nodes that are deployed in a network area. These nodes are generally battery operated and consist of single or multiple sensors. WSNs are used for sensing, computing, or transmitting data from the physical environment. In order to improve the performance of WSNs, the data collection capability of nodes needs to be improved. In this paper, we investigated the performance of heterogeneous sensing networks in terms of packet delivery ratio, node lifetime with an efficient data collection scheme. We propose a model in which a mobile sink is used to collect the data in rounds and the network area is divided into the regular hexagonal structure. To achieve high efficiency in data collection, these hexagons are further divided into different levels and the division of hexagons depends on the data generating amount. The mobile sink adjusts itself according to different levels and makes a trajectory according to each level. The simulation result shows that the proposed model has better performance in terms of packet delivery ratio and node lifetime.