Abstract
This paper proposes ladder-logic programming model for sensor actuator networks. We also demonstrate optimized operations of them with central controller-based device management (CCDM) architecture. A wireless sensor actuator network consists of distributed wireless nodes, and implementing data streams and data processors onto these wireless nodes has been challenging. System programmers have to describe their instructions by a programming language, and data processors must be placed so that it optimizes, for example, total network traffic. The ladder-logic model enables the programming of them, and CCDM makes various types of optimizations feasible, including the optimization of network traffic, delivery latency, load-balancing and fault-tolerance even though these algorithms are not lightweight. In this paper, we focus on traffic reduction case, and propose two moderately complex algorithms. The experiment has shown that CCDM achieves optimizations even with such moderately complex algorithms.
