Virtual Grid-Based Data Collection Using Mobile Sink in Wireless Sensor Networks
Youxi Lee, Chih‐Yung Chang, Jiazao Lin · 2020
In wireless sensor networks (WSN), many studies in recent years have considered using mobile sink (MS) for data collection. A large number of studies focused on the collection points(CP) selection and routes construction, aiming to reduce the working loads of data-forwarding among the sensor nodes and prolong the network lifetime. This paper presents a virtual grid-based data collection (VGDC) scheme using mobile sink, aiming at balancing the energy dissipation of sensor nodes. The proposed VGDC partitions the monitoring region into a number of virtual grids. Then it selects a collection point in each grid responsible for collecting data of the other sensor nodes in the grid. To balance the workload of forwarding loads of all sensors, two policies are adopted. First, the VGDC maximize the total number of CPs by minimizing the grid size under the constraint of predefined path length. Second, the collection points are dynamically changed in different rounds. Performance evaluations reveal that the proposed VGDC outperforms existing studies in terms of energy consumption and network lifetime.