Design and Implementation of Sensor Tag Middleware for Monitoring Containers in Logistics Systems

Sensor tag having user memory can be used both for identification and storing sensor data. Monitoring sensor data in container is a big issue in logistics system. Containers in logistics system generate huge amount of sensing information which requires handling efficiently to provide response to the user queries. Moreover, collection of sensor data from sensor tag by using heterogeneous reader devices is also a big challenge in sensor tag deployment. To achieve these goals, a flexible middleware is needed that provides glue between applications and the heterogeneity of devices by facilitating optimized set of services at high performance to a scalable number of users. In this paper, we propose sensor tag middleware architecture that incorporates characteristics of standard EPCglobal middleware with several unique features such as reader abstraction, integration, high performance and scalability. In order to illustrate our proposed middleware we implement it for monitoring containers in port logistics. By our experimental result we show that building query indexing scheme considerably improves the performance than naive approach.