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Cyber physical systems (CPSs) have grand visions with great socio-economic impacts such as blackout-free electricity supply and real-time disaster recovery. A key challenge is providing real-time data services for CPSs. Existing real-time data management techniques and wireless sensor networks (WSNs) fall far short to support timely, secure real-time data services for CPSs. In this paper, we present a novel information-centric approach to supporting these requirements in CPSs. In our approach, network-enabled real-time embedded databases (nRTEDBs) communicate with each other and control and communicate with wireless sensors in a secure, timely manner. Unlike sensor databases such as TinyDB, nRTEDBs collaboratively derive global knowledge of real world phenomena. Based on the collective information, they actively control a WSN to extract important data directly relevant to an event of interest. In this way, nRTEDBs considerably enhance the overall timeliness, security, and efficiency.
Kang et al. (Sun,) studied this question.
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