一种帧长优化的动态时隙ALOHA算法

Frame Size Optimized Dynamic Framed Slotted ALOHA Algorithm

为了解决RFID(射频识别)系统中多标签通信时的碰撞问题,人们提出了各种防碰撞的算法,而动态时隙ALOHA算法是其中效率较高的一类。文章对动态时隙ALOHA算法中的最优帧长进行了研究,考虑到在使用曼彻斯特编码的前提下,标签发送的信息之间发生某些特殊的碰撞,阅读器依然能够正确识别标签的情形,提出了一种优化新算法。数学分析和仿真结果表明,与现有的动态时隙ALOHA算法相比,该算法的系统效率更高。

For solving the problem of the collision between tags in Radio Frequency Identification（RFID）system,many anti-collision algorithms have been proposed.One of the efficient anti-collision algorithms is Dynamic Framed Slotted ALOHA（DFSA）algorithm.This paper studies the optimal frame size of EDFSA and proposes a new algorithm considering tags,which can be identified by a reader when special collision exists in some situation by using Manchester code.Mathematical analysis and simulation result shows that this algorithm is more efficient than DFSA.