基于调度方式的阅读器防碰撞算法

目的阅读器碰撞是射频识别技术(RFID)的常见问题,常见的防碰撞算法没有同时考虑阅读器碰撞的2种情况,并且对硬件要求高,这影响了RFID系统数据通信的效率。提出了基于调度的阅读器防碰撞算法。方法采用中央服务器调度方式,建立混合整数规划模型,按一定的规则,将频率和时隙分配给阅读器;在2种不同阅读器距离及同时考虑吞吐率和均衡率的情况下,对提出的算法与CSMA算法进行了对比。结果在同时考虑吞吐率和均衡率的条件下,基于调度的阅读器防碰撞算法优于CSMA算法。结论该算法能够提高吞吐率和均衡率。

An Anti-collision Algorithm Based on Schedule Mode for Reader

Objective Reader collision is a common problem in RFID. The common anti-collision algorithm do not consider the two types of reader collision simultaneously and have high requirements of hardware, which influences the efficiency of data transmission in the process of RFID data communication. The aim of this paper was to propose an anti-collision algorithm based on schedule mode. Methods The algorithm was proposed based on the anti-collision of scheduling, which adopted the central server. The mixture integer programming model was established to optimize the resources among the readers. At 2 different reader distances, and considering both the throughput rate and the equality rate, the proposed algorithm was compared with the CSMA algorithm. Results When considering both the throughput rate and the equality rate, the algorithm based on schedule mode was superior to the CSMA algorithm. Conclusion This algorithm could enhance the throughput rate and the equality rate.