Abstract
The intelligent information system constructed by the sensor web can monitor all kinds of sudden abnormal events, improve the ability of event discovery and rapid disposal, and promote the development of smart city and the construction of the Internet of Things (IoT). In this paper, we consider the problem of complex integration and poor expansibility in the large-scale full-network operation and maintenance system construction and propose an active and passive event service (APES) method based on the sensor web. In the APES, a system framework with the perception layer, data service layer, event service layer, and user layer is firstly defined and constructed. Secondly, a middleware with the ability to active and passive event service (APES) is designed and implemented based on the system framework. Finally, taking abnormal weather and fire warning as examples, the performance of the proposed event service middleware is tested, respectively. Experimental results show that the proposed APES model in this paper has the advantages of high precision, stable operation, and strong practicability and solves “Information Island” and low reusability in the whole network operation and maintenance system. This is an attempt at the structural design of a similar intelligent information system.
Highlights
With the commercially developing industrial Internet of ings (IIOT), the original scattered industrial network is rapidly evolving into a large-scale industrial interconnection network via the integration of information and communications technology (ICT) and operational technology (OT) [1,2,3]
E major contributions are concluded as follows: (1) Based on the sensor web framework, the APES scheme is presented from the aspects of service architecture, service mode, and event discovery, which is composed of the perception layer, data service layer, event service layer, and user layer
Event filter is the core of the passive event service, which is responsible for receiving user’s event subscription, constructing event filter expression in real time, sending data service request to the parser, receiving the parsing result returned by the parser, and judging whether the expression is established according to these results
Summary
With the commercially developing industrial Internet of ings (IIOT), the original scattered industrial network is rapidly evolving into a large-scale industrial interconnection network via the integration of information and communications technology (ICT) and operational technology (OT) [1,2,3]. Our proposed active and passive event service (APES) model based on the sensor web has the advantages of high precision, stable operation, and strong practicability and effectively solves the island effect and low reusability in the whole network operation and maintenance system. (1) Based on the sensor web framework, the APES scheme is presented from the aspects of service architecture, service mode, and event discovery, which is composed of the perception layer, data service layer, event service layer, and user layer. E SES specification in the overall sensor web framework has been applied to Zanzibar Island in northeast Tanzania, Africa, and successfully realized the monitoring and notification service of water resources [21] It avoids wasting a lot of time on polluting water sources, indirectly contributing to the region’s workforce and economic development. An alert notification is sent to the user. is scheme makes up for the shortage of the CORBA and solves the defects that SES cannot provide pure active event service
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