Estimation Algorithm of Identifying Object Number in Passive RFID System

  • Authors:

  • Xinfeng Wang;GuiHai Xie;Ziyuan Qi;Liang Ming

  • Affiliations:

  • -;-;-;-

  • Venue:
  • DMAMH '07 Proceedings of the Second Workshop on Digital Media and its Application in Museum & Heritage
  • Year:
  • 2007

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Abstract

This paper investigates how to shorten identifying time of multiple objects and gain maximum throughput between reader and tags in passive RFID system. We present a combinatorial model of the communication mechanism between reader and tags, and use this model to deduce an algorithm to estimate tag number: BDE (Binomial Distributing Estimation) algorithm. With the help of BDE algorithm, we then select optimal slot number in slotted ALOHA protocol. Simulation results are the followings: First, identifying time of BDE algorithm is satisfyingly shortened when identifying tag number is one, two and three, and then it increases linearly with tag number. Second, throughput is about 34%, which is closed to academic maximum. Third, Analysis of identifying time ingredients indicates that to optimize reader commands and speed up reader data rate can shorten identifying time further.