The purpose of this paper is to study how to improve the performance of RFID robot system by anti-collision algorithms. For radio frequency identification (RFID) robots operating in mobile scenes, effective anti-collision algorithm not only reduces missed reading but also enhances the speed of RFID robots movement.
An effective anti-collision algorithm is proposed to accelerate tag identification in RFID robots systems in this paper. The tag collisions in the current time slot are detected by a new method, and then further resolve each small tag collision to improve system throughput, rather than the total tags number estimation. After the reader detected the collision, three different collision resolution methods were described and studied, and the situation of missing tag caused by reader moving is also discussed.
The proposed algorithm achieves theoretical system throughput of about 0.48, 0.50 and 0.61 and simulates to show that the proposed algorithm performance is significantly improved compared with the existing ALOHA-based algorithm.
The proposed RFID anti-collision algorithm is beneficial to improve the moving speed and identification reliability of the RFID robots in complex environments.
This work was supported in part by the Industrial Science and Technology project of Shaanxi Province (2014K 05-09), the Natural Science Foundation of Education Department of Shaanxi Province (18JK0704), the Science and technology plan project of Xi'an(201805040YD18CG24-3), the key Research and Development plan of Shaanxi Province (2018ZDXM-GY-041, 2018GY-150), Major Special Projects for Intelligent manufacturing of the Ministry of Industry and Information Technology(Z135060009002), and the National Key R&D Program of China (2018YFC0810100).
Wang, H., Wang, S., Yao, J., Pan, R., Huang, Q., Zhang, H. and Yang, J. (2020), "Effective anti-collision algorithms for RFID robots system", Assembly Automation, Vol. 40 No. 1, pp. 55-64. https://doi.org/10.1108/AA-11-2018-0237
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