一种新的RFID防碰撞算法设计
doi: 10.3724/SP.J.1146.2006.00922
A Novel Design for RFID Anti-collision Technique
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摘要: 该文提出了一种基于码分多址思想的时隙ALOHA算法(CS-ALOHA)，来解决射频识别(RFID)中的防碰撞问题。在建立该算法的数学模型的基础上，分析了其对系统吞吐量带来的好处，并推导出系统稳定的条件。理论与仿真实验表明，采用CS-ALOHA算法的系统稳定范围要大于时隙ALOHA系统，并且当选用的扩频码组阶数为N时，CS-ALOHA算法的最大吞吐量可达原时隙ALOHA的N倍。Abstract: In this paper, a novel slotted-ALOHA algorithm based on Code division is presented for solving the RFID anti-collision problems. Its advantage to the system throughput is analyzed based on its mathematical model and the condition for systems stability is inferred as well. The theoretical and simulated results indicate that the stable scope of SC-ALOHA is broader than that of S-ALOHA and when N is the degree of spread spectrum codes used, the maximum throughput of SC-ALOHA might achieve N times that of S-ALOHA.
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