RFID Estimation With Blocker Tags

Liu, Xiulong; Xiao, Bin; Liu, Alex X.; Wu, Jie; Xie, Xin; Qi, Heng

doi:10.1109/tnet.2016.2595571

Cited by 49 publications

(12 citation statements)

References 27 publications

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“…Tag estimation is needed in other cases, as we use blocker tags within interrogation zone of RFID for preserving the privacy of stored information in tags. Liu et al propose REB tag estimation scheme with the presence of blocker tags. A blocker tag is an RFID device that is preconfigured with a set of known RFID tag IDs, which we call blocking IDs.…”

Section: Related Workmentioning

confidence: 99%

Novel tag estimation method by use of Manchester coding in RFID systems

HajMirzaei

2019

Int J Communication

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Radio frequency identification suffers from tag collision issue. ALOHA-based algorithms are useful and practical groups of tag anti-collision algorithm among others. Some standards such as EPCglobal Class-1 Generation-2 use some kind of dynamic framed slotted ALOHA (DFSA) to cope with tag collision. DFSA efficiency depends on estimating the number of unidentified tags in each identification cycle accurately. So tag estimation is one of the challenging issues in DFSA. In this paper, we use Manchester coding to compute the lower bound of collided tags in a frame and then add α as an additional value to computed value according to the difference between optimal number of collision slots and calculated number of collision slots. Then, we evaluate and compare our method with other proposed methods. KEYWORDS DFSA, RFID, tag anti-collision, tag estimation | INTRODUCTIONThe automatic identification and data capture (AIDC) technology was introduced to simplify the way of identification. Among other members of this technology including optical character recognition (OCR), barcode and infrared identification technologies, and the radio frequency identification (RFID) could be called the rising star in this family because of its characteristics: nonline-of-sight and contactless reading data. 1 RFID comprises three elements: tags that store data, reader that reads/writes data from/to tags within its interrogation zone, and a server to analyze received data from reader. The basic of identification process in RFID is easy to understand; first, reader transmits adequate energy to power up the tags, then communicate with tags to demand, and receive their identifiers (ID). One of the benefits of RFID rather than some other auto ID technologies like barcode is reading more than one tag simultaneously via a reader. But this benefit causes side effects like collision. It is reported that in typical RFID deployments, the tag read rate is usually about 60% to 70%. 2 There are two main types of collision: tag collision and reader collision. Tag collision happens when more than one tag within interrogation zone of a reader transmit their data to that reader simultaneously. Result of this transmission is receiving of corruption signals by reader. Reader collision happens when one tag is within interrogation zone of two or more readers and they want to read that tag simultaneously. Both reader and tag collision are depicted in Figure 1. To address this issue tag and reader anti-collision is proposed, but our focus in this paper is on tag anti-collision algorithms. There are four types of tag anti-collision algorithms: ALOHA-based, tree-based, counter-based, and some algorithms that are made by combination of the first three types, called hybrid algorithms. 3 ALOHA-based algorithms like framed slotted ALOHA (FSA) use frame that comprises some slots, and then, each tag can transmit its data in a slot. These algorithms are probabilistic. 4-7 Tree-based algorithms like query tree divide all collided tags to two groups according to bits of thei...

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Section: Related Workmentioning

confidence: 99%

Novel tag estimation method by use of Manchester coding in RFID systems

HajMirzaei

2019

Int J Communication

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“…Liu et al also conducted statistical analysis on the two frame status obtained from these two Aloha processes to estimate the number of genuine tags. Liu et al then considered the energy-efficiency for the active RFID systems and studied how to optimize REB protocol for saving energy in [17].…”

Section: Efficient Communication Schedulingmentioning

confidence: 99%

CPS-Based Smart Warehouse for Industry 4.0: A Survey of the Underlying Technologies

et al. 2018

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This paper discusses how the state-of-the-art techniques in cyber-physical systems facilitate building smart warehouses to achieve the promising vision of industry 4.0. We focus on four significant issues when applying CPS techniques in smart warehouses. First, efficient CPS data collection: when limited communication bandwidth meets numerous CPS devices, we need to make more effort to study efficient wireless communication scheduling strategies. Second, accurate and robust localization: localization is the basis for many fundamental operations in smart warehouses, but still needs to be improved from various aspects like accuracy and robustness. Third, human activity recognition: human activity recognition can be applied in human-computer interaction for remote machine operations. Fourth, multi-robot collaboration: smart robots will take the place of humans to accomplish most tasks particularly in a harsh environment, and smart and fully-distributed robot collaborating algorithms should be investigated. Finally, we point out some challenging issues in the future CPS-based smart warehouse, which could open some new research directions.

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“…Multi-category RFID Estimation was proposed in [18], which is a technique to estimate RFID tags in different categories. The first ever RFID estimation technique in presence of blocker tags was proposed in [19]. An algorithm to estimate RFID tags in composite sets was proposed in [20].…”

Section: Compliancementioning

confidence: 99%