Utilizing Physical Layer Information To Improve RFID Tag Identification

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Title: Utilizing Physical Layer Information To Improve RFID Tag Identification
Author: Khasgiwale, Rushikesh Shree
Abstract: Radio -frequency identification (RFID ) systems are designed for fast and accurate identification of multiple RFID tags . Their performance depends on the effective detection andresolution of communication collisions caused by the presence of multiple tags in the reader's field . Present RFID protocols do not rely upon the received physical waveform obtainedduring a collision for either collision resolution or improved identification rate . This signal contains important information that is often ignored or otherwise discarded .In this thesis I analyze the physical layer information extracted from a collision waveform from the ISO -18000 -6C protocol and identifypotentially performance enhancing information contained therein . Utilization of this information to increase the tag identification rate is examined and the effectivenessof these approaches is analyzed . We find that utilizing the information contained within the physical waveforms can improve the identification rate for ISO 18000 -6C systems by as much as 21 \ % . By modifying the protocol to explicitly take advantage of this waveform information , we estimate that another 10 \ % identification rate improvement may be achieved .This thesis proposes a method of using the physical layer signal from a collision to detect the existence of a weak tag in the presence of stronger tag to improve the reliability of the present protocol .The performance of random number generator on the chip and may be non -ideal leading to a non -uniform distribution . The effect of this deviation from the theoretical values and its effect on the performance of the protocol is analyzed by simulation . Output of the random number generator of some standard RFID tags is also evaluated .
URI: http : / /hdl .handle .net /10106 /2075
Date: 2010-03-03


Utilizing Physical Layer Information To Improve RFID Tag Identification. Available electronically from http : / /hdl .handle .net /10106 /2075 .

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