Performance evaluation and optimization of UHF RFID systems
ABSTRACT An experimental study of a modern ultra high frequency (UHF) radio frequency identification (RFID) system is here proposed. Some relationships between the electromagnetic field levels received by the deployed devices and the system overall performance are in particular analyzed. The main purpose is to experimentally analyze the behavior and performance of a real world UHF RFID system underlying the importance of preliminary measurements in the setup and optimization of these systems. Practical rules to improve the system reliability are finally deduced. To this aim, a detailed description of tags operation in near and far field regions of the reader is given, along with meaningful results from experiments conducted on purpose. Experiments have been carried out by using an ad-hoc realized testbed, equipped with a real-life UHF RFID system.
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ABSTRACT: Radio-frequency identification (RFID) readers are powered RF devices that communicate with tags (whether mobile or fixed) and read necessary information to be processed. A mobile RFID tag is detected by an RFID antenna. In a mobile RFID where the RFID tag is attached to a mobile object such as a vehicle, a human, or an animal, information is more difficult to detect than in the case where the tag is attached to a stationary object. Currently, deployment engineers and researchers use trial-and-error approaches to decide on the best conditions of the tag detection influence factors which affect tag detectability (detection rate). As expected, these approaches are time consuming. Even though mobile RFID systems have become widely used in industry and tag detection problems are crucial at deployment, very few researches on them have been conducted so far. Thus, a quick and simple method for finding tag detectability is needed to improve the traditional time consuming trial-and-error method. In this paper, we propose a unique approach ldquothe intelligent prediction method of tag detection rate using support vector machine (SVM).rdquo The intelligent method predicts the mobile RFID tag detectability instead of the trial-and-error experimental procedures. The simulation results of the proposed method are very comparable to the trial-and-error experimental approach. The proposed intelligent method gives a very high accuracy of mobile RFID tag detectability prediction and proves to be superior to the current method in time as well cost savings. The predicted tag detectability results can be used for analyzing mobile RFID tag detection influence factors and their conditions.IEEE Sensors Journal 03/2009; · 1.48 Impact Factor
Conference Paper: Perturbative Time and Frequency Allocations for RFID Reader Networks.[Show abstract] [Hide abstract]
ABSTRACT: RFID reader networks often have to operate in frequency and time constrained regimes. One approach to the allocation of frequency and time to various readers in such regimes is to perturb the network slightly so as to ease the constraints. We investigate how to perform these perturbations in a manner that is profitable from time and frequency allocation point of view.Emerging Directions in Embedded and Ubiquitous Computing, EUC 2006 Workshops: NCUS, SecUbiq, USN, TRUST, ESO, and MSA, Seoul, Korea, August 1-4, 2006, Proceedings; 01/2006
Conference Paper: Experimental analysis of UHF RFID impairments and performance[Show abstract] [Hide abstract]
ABSTRACT: Radio frequency identification (RFID) is a modern wireless communication technology used for identification purposes. By now, experimental results showing the actual performances reachable by a UHF RFID system, are still missing, together with the problems that can be encountered in practice and the corresponding solutions. In this paper, the performance of an UHF RFID system in real-world conditions are experimentally assessed to experimentally investigate the reliability of UHF RFID systems typical environmental conditions; and to deduce helpful and practical hints in order to efficiently assess and enhance performances of an UHF RFID system.Instrumentation and Measurement Technology Conference, 2009. I2MTC '09. IEEE; 06/2009