| 引用本文： |
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张予帅,蒋泰,苏平,罗义学,肖煌.ISO 18000-6 Type B与Type C标准的分析与比较[J].广西科学院学报,2009,25(4):336-339. [点击复制]
- ZHANG Yu-shuai,JIANG Tai,SU Ping,LUO Yi-xue,XIAO Huang.Analysis and Comparison of ISO/IEC18000-6 Type B and Type C Standard[J].Journal of Guangxi Academy of Sciences,2009,25(4):336-339. [点击复制]
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| 摘要: |
| 分析比较UHF频段ISO/IEC 18000-6 Type B与Type C两种协议标准的链路编码、命令和防冲突机制的优缺点。Type B采用的曼彻斯特编码是早期的编码标准,实现较为容易,但是编码效率较低;Type C采用的PIE编码,在物理上实现容易,传输效率高。Type B的所有命令位数都为8位,而Type C的命令位数采用可变字长前缀编码,相比Type B提高了传输效率。Type B采用的自适应二进制树防冲突机制当等待识别的标签数量较多时,效率较低;Type C采用的随机时隙防冲突机制具有算法简单,便于实现等优点,但是该机制的时隙是随机分配的,具有一定的不确定性。 |
| 关键词: 射频识别 标准 协议 防冲突 |
| DOI： |
| 投稿时间：2009-10-10 |
| 基金项目:国家电子信息产业发展基金项目(信部运[2006]634号)资助。 |
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| Analysis and Comparison of ISO/IEC18000-6 Type B and Type C Standard |
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ZHANG Yu-shuai1, JIANG Tai1, SU Ping1, LUO Yi-xue2, XIAO Huang2
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| (1.College of Computer and Control, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China;2.Traffic Police Branch, Nanning Bureau Security, Nanning, Guangxi, 530028, China) |
| Abstract: |
| This paper highlights the analysis and comparison of link encoding,instruction and anti-collision mechanism of ISO/IEC 18000-6 Type B and Type C standard in UHF channel.Manchester coding which Type B uses is earlier encoding standards.This encoding achieves relatively easy but with a lower coding efficiency,PIE encoding which Type C uses has advantage of easy of physical realization and transmission of high efficiency.Commands of Type B are 8 bits,while commands of Type C use variable length prefix encoding which improves transmission efficiency. Adaptive binary tree anti-collision mechanism of Type B is low efficiency when identification tags are in large number.Random time slot anti-collision mechanism of Type C is a simple algorithm with easy realization,but the time slot of mechanism is random distribution and is uncertain. |
| Key words: RFID standard protocol anti-collision |
