A service oriented-based system for real time industrial applications

The benefits of utilizing service oriented architectures (SOA) in industrial automation are well recognized. Nevertheless these architectures imply connection establishments and message exchanges with a large amount of overhead which is inappropriate when considering the real time characteristics of an industrial application. Furthermore, wireless sensor networks (WSNs) which are often part of such applications cannot handle the need for continuously parsing and storing of SOA messages whose data volume is high. In this paper an innovative system approach is proposed capable of retaining all the interoperability issues that SOA provides. In this system a new bridge is used for mapping WSNs to IP systems and a novel compression technique is applied that reduces the size of the exchanged messages but nonetheless not prohibiting the usage of SOA standards. Finally a SOA-based technology is proposed which is embedded on wireless sensors motes and enables them to communicate with other devices regardless their implementation platform. Simulation results have shown that the proposed system can operate with real time responses when the number of sensors does not exceed a specific limit and the required sampling period is within particular time intervals in contrast with a classical SOA-based system.