APOI-BasedRFIDReaderDeploymentandAssociated详解.pptVIP

A POI-Based RFID Reader Deployment and Associated interference Effect 基于POI的RFID阅读器配置方法及其相关的干扰效果 SUMMARY This paper presents a simulation based method to predict the amount of frequency interference in a passive type RFID system. To judge occurrence of frequency interference, we use a parameter POI( probability of interference) that depends on several factors such as multiple access method, emission mask, the number of channel, etc. Due to its dependence on several factors, a Monte-carlo based simulation is suitably used. Through the simulation ,we draw minimum separation distance between two readers and examine performance degradation due to aggregate interfering readers .Moreover, we present a reader deployment strategy based on the average POI of active readers operating in some area. key words: RFID,POI,FHSS,LFBT 摘要 本文提出一种仿真方法来预测无源RFID系统的频率干扰。我们用参数POI（干扰可能性）来衡量频率干扰，POI由多个因素决定，如多路访问的方法、辐射掩模、信道数目等。因为它由多个因素决定，适合于用Monte-carlo法来仿真。通过仿真，我们画出两个阅读器之间的最小分隔距离。最后我们还提出了基于平均POI的阅读器配置方法。 关键词：RFID，POI，FHSS，LFBT 1. Introduction Radio frequency identification (RFID) technology uses radio waves to automatically identify physical objects. Even though a RFID reader can read many tags in a flash, it is difficult to increase read rate due to various factors such as interference/collision, insufficient number of channel, the number of tags colliding, recognition speeds, etc. Many works have been done to deal with the interference/collision problem in RFID system. The tag collision can be resolved by some anti-collision algorithms like ALOHA or Binary tree protocol [1]. The reader collision is classified into frequency interference and tag interference. To reduce the frequency interference, multiple accessschemes such as FHSS (Frequency hopping spread spectrum) and LBT (Listen before talk) have been proposed [2],[3]. To tackle the tag interference, DCS (Distributed color selection) and VDCS (Variable-maximum DCS, colorwave)were proposed [4], [5]. 1.简介 RFID技术用无线电波来自动识别物体。虽然