摘要
无线射频识别(RFID)系统中的多个标签同时应答时会引起数据碰撞现象,使阅读器能正确读取信息所使用算法称为防碰撞算法。本文研究了目前RFID系统中常用的防碰撞算法,包括时隙ALOHA(S-ALOHA),纯ALOHA(P-ALOHA)和帧ALOHA(F-ALOHA),同时基于最优化原理对ALOHA防碰撞算法进行了改进。仿真结果表明采用最优化原理改进的ALOHA算法相比较现有RFID系统中常用的ALOHA防碰撞算法有明显的优越性,使得系统获得最佳的传输时隙及数据包大小,得到高吞吐率,低错误率,从而提高系统的工作效率。
The Reader collision problem occurs when the signal received from different tag at the same time. Anti-collision algorithm can be adopted to eliminate data collision. The common anti-collision algorithm is studied in this paper such as P-ALOHA, F-ALOHA and S-ALOHA, a novel anti-collision based on optimization theory （O-ALOHA） is also proposed. The simulation results illustrate that ALOHA anti-collision algorithm based on optimization theory can get apparent advantage. The performance of the RFID system can be improved by the optimized transfer slot with high throughput and low error rate.
出处
《电路与系统学报》
CSCD
北大核心
2009年第4期8-12,共5页
Journal of Circuits and Systems
基金
澳门科学技术发展基金资助项目(005/2005/A)
