针对无线射频识别系统应用中标签碰撞问题,在ALOHA算法基础上提出层次优先级控制的RFID防碰撞算法,增加标签层组信息以调整标签响应次序.算法综合考虑标签查询次数、传输时延整体能耗及吞吐率等性能指标,仿真分析表明,该算法较DFSA防碰撞算法有效提高了系统吞吐率,较QT在传输时延一定增加的情况下减少了查询次数,表现出良好的应用性能及可扩充性.
Aiming to solve the problem of label collision in the application of radio frequency identification (RFID) system,this paper proposes a RFID anti-collision algorithm with priority control based on the ALOHA algorithm,layer and group information is added to adjust the tag response order.The algorithm considers the query count,transmission delay,the overall energy consumption,and throughput and other performance indicators.The simulation results indicate that the algorithm has less collision probability than DFSA algorithm,and less queries than QT with transmission delay increased in a certain extent,thus demonstrating a better performance and scalability.