Publisher-side Event Filtering for QoS-Awareness in Ubiquitous Computing

In the ubiquitous computing environment a user may interact with a large number of devices. The publish´subscribe paradigm is suitable for the various applications by allowing the subscribers to declare their interests and receive only the notifications of interest. This paper propose a novel event filtering approach preventing waste in the space of the event queue of the event channel due to unwanted events and reducing the network load. Performance evaluation reveals that the proposed scheme displays significant improvement over the existing event service, Java messaging service (JMS) and Omnievent service in terms of event delivery time for various numbers of servers and data sizes.