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Abstract
The radio frequency identification (RFID) technology has gained a lot of recent interests because it has been widely recognised as a foundation technology for the ‘Internet of things’. In current multi-reader RFID systems, readers work with fairly less cooperation and are responsible to retrieve data from different number of tags individually, which results in large reading time of obtaining all tag data. In this paper, a fast tag reading problem in multi-reader RFID systems with the goal of obtaining all tag data by using minimum reading time is studied. A distributed load-balancing algorithm based on diffusion method is proposed to solve the problem by migrating tags from highly loaded reader to lightly loaded reader. The simulation results demonstrate the effectiveness and efficiency of proposed algorithm.
Acknowledgements
We thank the constructive comments from the anonymous referees. This work is partially supported by the National Natural Science Foundation of China (Grant nos 61133015 and 61003305), the Ph.D. Programs Foundation of Ministry of Education of China (Grant no. 20100161120022) and Hunan Provincial Natural Science Foundation of China (Grant no. 11JJA003).