Khadka Grishma, Hwang Suk-Seung
Department of Advanced Parts and Material Engineering, Chosun University, Gwangju 501-759, Korea.
Department of Electronic Engineering, Chosun University, Gwangju 501-759, Korea.
Sensors (Basel). 2017 Jan 1;17(1):78. doi: 10.3390/s17010078.
Radio-frequency identification (RFID) is a tracking technology that enables immediate automatic object identification and rapid data sharing for a wide variety of modern applications using radio waves for data transmission from a tag to a reader. RFID is already well established in technical areas, and many companies have developed corresponding standards and measurement techniques. In the construction industry, effective monitoring of materials and equipment is an important task, and RFID helps to improve monitoring and controlling capabilities, in addition to enabling automation for construction projects. However, on construction sites, there are many tagged objects and multiple RFID tags that may interfere with each other's communications. This reduces the reliability and efficiency of the RFID system. In this paper, we propose an anti-collision algorithm for communication between multiple tags and a reader. In order to suppress interference signals from multiple neighboring tags, the proposed algorithm employs the time-division (TD) technique, where tags in the interrogation zone are assigned a specific time slot so that at every instance in time, a reader communicates with tags using the specific time slot. We present representative computer simulation examples to illustrate the performance of the proposed anti-collision technique for multiple RFID tags.
射频识别（RFID）是一种跟踪技术，它能够通过使用无线电波从标签向读取器传输数据，实现即时自动物体识别以及为各种现代应用快速共享数据。RFID在技术领域已相当成熟，许多公司都开发了相应的标准和测量技术。在建筑行业，对材料和设备进行有效监控是一项重要任务，RFID除了能实现建筑项目的自动化外，还有助于提高监控能力。然而，在建筑工地，存在许多带标签的物体以及多个可能相互干扰通信的RFID标签。这降低了RFID系统的可靠性和效率。在本文中，我们提出了一种用于多个标签与读取器之间通信的防碰撞算法。为了抑制来自多个相邻标签的干扰信号，该算法采用时分（TD）技术，即给询问区内的标签分配特定的时隙，以便在每个时刻，读取器使用该特定时隙与标签进行通信。我们给出了具有代表性的计算机模拟示例，以说明所提出的针对多个RFID标签的防碰撞技术的性能。
