Mining Frequent Trajectory Patterns for Activity Monitoring Using Radio Frequency Tag Arrays

Liu, Yunhao; Chen, Lei; Pei, Jian; Chen, Qiuxia; Zhao, Yiyang

doi:10.1109/percom.2007.23

Cited by 125 publications

(86 citation statements)

References 10 publications

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“…VI. RELATED WORK Two major types of localization approaches are applied in RFID-based localization systems: tagged approaches [16]- [19] and tag-free approaches [20], [21]. In tagged approaches, the object which requires a localization service is attached with an RFID tag.…”

Section: Performance Of User Navigation Servicementioning

confidence: 99%

RollCaller: User-friendly indoor navigation system using human-item spatial relation

Guo

Yang

et al. 2014

IEEE INFOCOM 2014 - IEEE Conference on Computer Communications

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Abstract-Indoor navigation has received much attention in academics and industry in recent years. Previous methods often attempt to locate users with various localization algorithms in combination with an indoor map, so they need expensive infrastructures deployed in advance. In this study, we propose to utilize existing indoor objects attached RFID tags and the reader to navigate the user to the destination, without need of any extra hardware. The key insight is that the personal movement takes an impact on the Doppler frequency shift values collected from the indoor objects when getting close to the tag. Such local humanitem spatial relation is leveraged to infer the users position and further navigate user to destination step by step. We implement a prototype navigation system, called RollCaller, and conduct comprehensive experiments to examine its performance.

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Section: Performance Of User Navigation Servicementioning

confidence: 99%

RollCaller: User-friendly indoor navigation system using human-item spatial relation

Guo

Yang

et al. 2014

IEEE INFOCOM 2014 - IEEE Conference on Computer Communications

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“…When the target is present in one grid, it would affect several links between the reference nodes near the grid, and the degree of signal variations on different links is used to estimate the position of the object. In Liu's work [17][18][19], the authors proposed an approach that does not require the tracked objects to carry any devices as well, and the distance between two tags is set to be 1 meter. Hence, when the monitoring region is large, the cost and communication overhead would be high.…”

Section: Related Workmentioning

confidence: 99%

“…In this paper, we propose the LSA-POL scheme that locates a target in an LAU that does not require any training process as opposed to [17,18]. Compared with the work in [15,16], the proposed LSA-POL method covers a larger monitoring area and is more suitable for practical applications.…”

Section: Related Workmentioning

confidence: 99%

Link Sensing-Adaptive Passive Object Localization in Wireless Sensor Networks

Tong

Wang

Chang

et al. 2014

International Journal of Distributed Sensor Networks

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The passive object localization (POL) problem in wireless sensor networks aims to determine the location of a target without any device attached for receiving or transmitting signal. This problem is challenging as there is very limited information available for deriving the target location. By combining the diffraction and scattering models, we propose a link sensing adaptive approach to POL, which first decides the target position attribute based on the signal strength and then localizes the target in different modes. We conduct rigorous localizability analyses and design a unit localization area scheme to achieve a higher level of localization accuracy. The efficacy of the proposed method is evaluated through comprehensive experiments in real life network environments.

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“…One typical application is intrusion detection, in which it is impossible and unreasonable to equip intruders with locating devices. To tackle this issue, recently a novel concept of Device-Free Localization, also called Transceiver-Free Localization, is proposed [57][58] . Device-free localization is envisioned to be able to detect, localize, track, and identify entities free of devices, and works by processing the environment changes collected at scattering monitoring points.…”

Section: D) Costmentioning

confidence: 99%

Location, Localization, and Localizability

Liu

Yang

Wang

et al. 2010

J. Comput. Sci. Technol.

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268

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Location-aware technology spawns numerous unforeseen pervasive applications in a wide range of living, production, commence, and public services. This article provides an overview of the location, localization, and localizability issues of wireless ad-hoc and sensor networks. Making data geographically meaningful, location information is essential for many applications, and it deeply aids a number of network functions, such as network routing, topology control, coverage, boundary detection, clustering, etc. We investigate a large body of existing localization approaches with focuses on error control and network localizability, the two rising aspects that attract significant research interests in recent years. Error control aims to alleviate the negative impact of noisy ranging measurement and the error accumulation effect during cooperative localization process. Network localizability provides theoretical analysis on the performance of localization approaches, providing guidance on network configuration and adjustment. We emphasize the basic principles of localization to understand the state-of-the-art and to address directions of future research in the new and largely open areas of location-aware technologies.Keywords location-based services (LBS), localization, error control, localizability, wireless ad-hoc and sensor networks LocationThe proliferation of wireless and mobile devices has fostered the demand for context-aware applications, in which location is viewed as one of the most significant contexts. For example, pervasive medical care is designed to accurately record and manage patient movements [1][2] ; smart space enables the interaction between physical space and human activities [3][4] ; modern logistics has major concerns on goods transportation, inventory, and warehousing [5][6] ; environmental monitoring networks sense air, water, and soil quality and detect the source of pollutants in real time [7][8][9][10][11] ; and mobile peer-to-peer computing encourages content sharing and contributing among mobile hosts in the vicinity [12][13] . In brief, location-based service (LBS) is a key enabling technology of these applications and widely exists in nowadays wireless communication networks from the short-range Bluetooth to the long-range telecommunication networks, as illustrated in Fig.1.Recent technological advances have enabled the development of low-cost, low-power, and multifunctional sensor devices. These nodes are autonomous devices with integrated sensing, processing, and communication capabilities. With the rapid development of wireless sensor networks (WSNs), location information becomes critically essential and indispensable. The overwhelming reason is that WSNs are fundamentally intended to provide information on spatial-temporal characteristics of the physical world; hence, it is important to associate sensed data with locations, making data geographically meaningful. For example, a number of applications, such as object tracking and environment monitoring, inherently rely on loc...

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Mining Frequent Trajectory Patterns for Activity Monitoring Using Radio Frequency Tag Arrays

Abstract: Abstract

Cited by 125 publications

References 10 publications

RollCaller: User-friendly indoor navigation system using human-item spatial relation

RollCaller: User-friendly indoor navigation system using human-item spatial relation

Link Sensing-Adaptive Passive Object Localization in Wireless Sensor Networks

Location, Localization, and Localizability

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