Event Processing Support for Cross-Reality Environments

Complex event processing (CEP) is an essential functionality for cross-reality environments. Through CEP, we can turn raw sensor data generated in the real world into more meaningful information that has some significance for the virtual world. In this article, the authors present DejaVu, a general-purpose event processing system built at ETH Zurich. SmartRFLib, a cross-reality application, builds on DejaVu and enables real-time event detection over RFID data streams feeding a virtual library on Second Life.