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Sensors 2019, 19(6), 1367; https://doi.org/10.3390/s19061367

An Energy Efficient Synchronization Protocol for Target Tracking in Wireless Sensor Array Networks

1
Department of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China
2
Key Lab for IOT and Information Fusion Technology of Zhejiang, Hangzhou Dianzi University, Hangzhou 310018, China
3
School of Cyber Science and Engineering, Wuhan University, Wuhan 430072, China
4
Advanced Technology Institute, Zhejiang University, Hangzhou 310027, China
*
Author to whom correspondence should be addressed.
Received: 1 January 2019 / Revised: 6 March 2019 / Accepted: 6 March 2019 / Published: 19 March 2019
(This article belongs to the Section Sensor Networks)
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Abstract

Time synchronization is an important middleware function that supports the Quality of Service (QoS) of systems in wireless sensor array networks. Instead of providing high synchronization accuracy for all application scenarios, we argue that synchronization protocols should be application specific. In this paper, we exploit the synchronization requirements of target-tracking systems in wireless sensor array networks and propose an energy-efficient Sensor Array Synchronization Protocol (SASP), which provides the required synchronization accuracy to guarantee the QoS. Specifically, when no target appears, to guarantee system lifetime, coarse synchronization is achieved with little overhead by piggybacking time information onto periodical network maintenance packets. Once targets appear, SASP achieves high inter-array and relatively higher intra-array synchronization accuracy rather than the traditional network-wide high accuracy on average. In this way, it guarantees reliable communication and accurate data fusion, while reducing energy consumption. Theoretical analysis and extensive evaluations show the effectiveness of the proposed protocol. View Full-Text
Keywords: synchronization; target tracking; sensor arrays; wireless sensor networks synchronization; target tracking; sensor arrays; wireless sensor networks
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Shen, J.; Yin, M.; Luo, J.-A.; Wang, Z.-B.; Wang, Z.; Li, Z.-H. An Energy Efficient Synchronization Protocol for Target Tracking in Wireless Sensor Array Networks. Sensors 2019, 19, 1367.

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