Abstract:

The wide application of Cyber Physical System (CPS) requires solving a crucial issue regarding the information processing of CPS software.Complex Event Processing(CEP) is one of the core tasks for CPS information processing.The event streams of CPS applications have many features,such as heterogeneity,distribution,mass,uncertainty,and et al. In the practical applications of the CPS,due to reasons,such as noise,sensor error or wireless communication techniques,uncertain complex events processing becomes very important. In order to deal with largescale probabilistic streams,we propose an effective method called Uncertain Complex Event Stream Processing (UCESP),which can not only handle massive uncertain event streams in time but also calculate the probability of complex events.USCESP improves the existing RFID Complex Event Detection Algorithm (RECDA),and supports query processing of history probabilistic events.We also propose an event probability model for probability calculation,and improve the efficiency by using the association query table.Experiments show that, compared with traditional methods, the proposal has better performance in handling uncertain event streams.

Key words: cyber physical system;complex event processing;uncertain event streams