King Saud University, Riyadh, Saudi Arabia.
J Med Syst. 2012 Dec;36(6):4037-50. doi: 10.1007/s10916-012-9876-5. Epub 2012 Sep 4.
Radio Frequency IDentification (RFID) has allowed the realization of ubiquitous tracking and monitoring of physical objects wirelessly with minimum human interactions. It plays a key role in a wide range of applications including asset tracking, contactless payment, access control, transportation and logistics, and other industrial applications. On the other side, RFID systems face several technical challenges that need to be overcome in order to achieve their potential benefits; tags collisions and localization of tagged objects are two important challenges. Numerous anti-collision and localization protocols have been proposed to address these challenges. This paper reviews the state-of-art tags' anti-collision and localization protocols, and provides a deep insight into technical issues of these protocols. The probabilistic and deterministic anti-collision protocols are critically studied and compared in terms of different parameters. We further review distance estimation, scene analysis, and proximity localization schemes and provide useful suggestions. We also introduce a new hybrid direction that utilizes power control to spatially partition the interrogation range of a reader for more efficient anti-collision and localization. Finally, we present the applications of RFID systems in healthcare sectors.
射频识别 (RFID) 技术实现了对物理对象的无线、无处不在的跟踪和监控，只需最少的人工干预。它在许多应用中发挥着关键作用，包括资产跟踪、非接触式支付、门禁控制、交通运输和物流以及其他工业应用。另一方面，RFID 系统面临着一些需要克服的技术挑战，以实现其潜在的好处；标签碰撞和标记对象的定位是两个重要的挑战。已经提出了许多防碰撞和定位协议来解决这些挑战。本文回顾了标签的防碰撞和定位协议的最新技术，并深入探讨了这些协议的技术问题。我们从不同的参数方面对概率和确定性防碰撞协议进行了批判性的研究和比较。我们进一步回顾了距离估计、场景分析和接近定位方案，并提供了有用的建议。我们还引入了一种新的混合方向，利用功率控制在空间上划分阅读器的询问范围，以提高防碰撞和定位的效率。最后，我们介绍了 RFID 系统在医疗保健领域的应用。
