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Sensors 2017, 17(1), 78; doi:10.3390/s17010078

Tag-to-Tag Interference Suppression Technique Based on Time Division for RFID

1
Department of Advanced Parts and Material Engineering, Chosun University, Gwangju 501-759, Korea
2
Department of Electronic Engineering, Chosun University, Gwangju 501-759, Korea
*
Author to whom correspondence should be addressed.
Received: 24 August 2016 / Accepted: 25 November 2016 / Published: 1 January 2017
(This article belongs to the Section Sensor Networks)
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Abstract

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. View Full-Text
Keywords: RFID; time division; interference suppression; tag-to-tag collision; signal-to-noise ratio RFID; time division; interference suppression; tag-to-tag collision; signal-to-noise ratio
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Khadka, G.; Hwang, S.-S. Tag-to-Tag Interference Suppression Technique Based on Time Division for RFID. Sensors 2017, 17, 78.

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