FlowPredictor: Continuous Queries on Actual and Predicted Object Flow in Symbolic Space

In this paper we demonstrate FlowPredictor, a novel Continuous Query Processing Framework (CQPF) for continuous query processing of the actual and predicted flow of receptor-based moving objects in a symbolic space covering both indoor and outdoor space. FlowPredictor enables spatiotemporal selection, aggregate, nested, and complex queries to be evaluated using novel algorithms. We illustrate the use of a novel model, called Flow Representation Graph (FRG), in the context of an airport bag handling system using an interactive web interface in FlowPredictor. The web interface allows modelling the FRG as well as definition of continuous spatio-temporal queries. Furthermore, the interface enables the user to manually create readings or start real-time simulations of moving objects in the defined FRG. We conclude by presenting the performance of FlowPredictor under heavy load.