煤矿人员定位无线标签并发碰撞概率的研究
首发时间:2010-04-01
摘要:本文根据煤矿井下人员定位系统的基本要求和有源RFID标签的工作特点,通过理论分析和计算,研究了系统中无线标签并发产生碰撞的原因和被读卡器漏读的概率。结果表明,随着标签个数的增加,无线碰撞概率接近线性增大,延长工作周期,可以减小碰撞概率,使用退避算法后,能有效减少漏读率。实际应用中可以根据项目需求设计不同的标签工作方式。
关键词: 人员定位 RFID 无线标签并发碰撞概率
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Study of the wireless tag concurrent collision probability in personnel position system of coal mine
Abstract:According to basic requirements of personnel position system of coal mine and the working characteristics of active RFID tags, through theoretical analysis and computational study the causes of collision probability while the wireless tag concurrent and mis-reads probability. The result shows that the probability of wireless collision increase near-linear by the number of tags increasing, and extending the duty cycle can reduce the collision probability. After using the backoff algorithm, the mis-reads probability can be effective reduced. It can be designed according to the project needs of different labels work in practical applications.
Keywords: personnel position system RFID collision probability of wireless tag
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No.4144949925112701****
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