Tag read enhancement using unsynchronized signal from adjacent readers in multi-cell RFID system

2014 IEEE RFID Technology and Applications Conference (RFID-TA) Pub Date : 2014-10-23 DOI:10.1109/RFID-TA.2014.6934201

Sicheng Zou, M. Crisp, S. Sabesan, A. Bekkali, A. Kadri, R. Penty, I. White

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引用次数: 1

Abstract

This paper addresses the interference issue in a passive multi-cell radio frequency identification (RFID) system. Instead of considering the negative effect of interfering RF signals from adjacent readers, we investigate its constructive effect in providing extra RF power to tags in the cell of the desired reader system. Through detailed simulation and experimental analysis, it is found that the unsynchronised signal from neighbouring readers can be utilized to activate marginal tags through enhancing power delivery. This results in improved tag received signal strength indicator (RSSI). In addition, it is found that the overlap zone between two RFID cells is not as vulnerable to interference as one might think. In fact, the adjacent reader may facilitate the desired reader to read more tags in the overlapping zone, although a longer inventory period may be required. We believe these findings might provide a new insight into the interference effect on multi-cell RFID system and be applied to future medium access control (MAC) protocols.

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在多小区RFID系统中使用邻近阅读器的非同步信号增强标签读取

本文研究了无源多单元射频识别系统中的干扰问题。我们没有考虑来自相邻阅读器的干扰射频信号的负面影响，而是研究了它在为所需阅读器系统单元中的标签提供额外射频功率方面的建设性作用。通过详细的仿真和实验分析，发现可以利用邻近读取器的不同步信号，通过增强功率传输来激活边缘标签。这提高了标签接收信号强度指标(RSSI)。此外，发现两个RFID单元之间的重叠区域并不像人们想象的那样容易受到干扰。事实上，相邻的阅读器可以帮助期望的阅读器在重叠区域读取更多的标签，尽管可能需要更长的库存周期。我们相信这些发现可能为多小区RFID系统的干扰效应提供新的见解，并应用于未来的介质访问控制(MAC)协议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2014 IEEE RFID Technology and Applications Conference (RFID-TA)

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