Abstract:

With the continuing advances in sensor networks and application design, appropriate middleware is needed to provide efficient service for concurrent applications according to the scarce resources and sensor energy. In this paper, we first define the eventtriggered based subscription model, and then propose a novel message oriented middleware named EventX to fit the features of sensor networks and its applications. EventX implements an algorithm to analyse and decompose compound subscription according to type and time interval, and another weight information based greed algorithm for the lowpower state of nodes. Simulation test results show that the EventX is capable to reduce the communication overhead and extend the lifetime of sensor networks.