CAJ | 학술논문

针对现有ALOHA防碰撞算法存在系统吞吐量低下的问题，利用射频识别阅读器和标签之间的信号能量传输特点，对帧时隙ALOHA算法( FSA)进行改进，提出一种分组帧时隙ALOHA防碰撞算法。根据接收信号能量的强度将标签均匀分布到帧时隙中进行分组应答，从而降低标签碰撞概率。仿真实验结果表明，在标签数与帧时隙数之比小于1.8的情况下，该算法最大系统吞吐量可达50%，优于FSA算法及碰撞分组算法。
침대현유ALOHA방팽당산법존재계통탄토량저하적문제，이용사빈식별열독기화표첨지간적신호능량전수특점，대정시극ALOHA산법( FSA)진행개진，제출일충분조정시극ALOHA방팽당산법。근거접수신호능량적강도장표첨균균분포도정시극중진행분조응답，종이강저표첨팽당개솔。방진실험결과표명，재표첨수여정시극수지비소우1.8적정황하，해산법최대계통탄토량가체50%，우우FSA산법급팽당분조산법。
To solve the low throughput of current ALOHA anti-collision algorithms, the Signal Strength Grouping Framed Slotted ALOHA( SSGFSA) algorithm is proposed,which exploits the energy transmission characteristics between Radio Frequency Indentification( RFID) reader and tags,improves the Framed Slotted ALOHA( FSA) algorithm to group tags,and distributes tags into frame slot according to received energy strength for reducing the probability of collision. Simulation results show that the maximum throughput of the algorithm is up to 50%,better than the theory value of the FSA algorithm and Collision Grouping Algorithm( GCA) in the case of the ratio of the tag number and the frame time slot number is less than 1 . 8 .