Trust secure data aggregation in WSN-based IIoT with single mobile sink

Wireless Sensor Networks (WSNs), as the fundamental infrastructure, are indispensable for the Industrial Internet of Things (IIoT). In particular, the security and effectiveness of WSNs in IIoT are universal and inevitable issues. In this paper, a WSN-based IIoT Model (WIM) is designed characterized by a single mobile sink. Based on WIM, a high robust aggregation tree algorithm and an outlier elimination scheme are proposed in a virtual grid network with the mobile sink, which can acquire data in a real-time and accurate manner. Moreover, a trust secure data aggregation mechanism is applied in WIM which takes both the direct trust and the indirect trust into consideration to perform the secure data aggregation without losing the effectiveness of network even if the sink moves randomly. The simulation results show that the proposed model and algorithms can promote the performances of WSNs in terms of accuracy, effectiveness and delay.