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A low delay multiple reader passive RFID system using orthogonal TH-PPM IR-UWB
KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.ORCID iD: 0000-0003-0061-3475
KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
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2010 (English)In: Proceedings - International Conference on Computer Communications and Networks, ICCCN, Zurich, 2010Conference paper, Published paper (Refereed)
Abstract [en]

Current passive RFID systems face the challenges to locate mobile objects in real time in indoor environments, including the realization of low delay as well as effective cooperation among readers and accurate ranging ability in the physical layer. In order to overcome these challenges, this paper presents a low delay multi-reader passive RFID system using ultra high frequency (UHF) radio as the forward link from readers to tags and orthogonal time hopping pulse-position modulation (TH-PPM) impulse ultra-wideband radio (IR-UWB) over the dynamic framed slotted ALOHA algorithm as the backward link from tags to readers. The asymmetric radio links overlap parts of the forward and backward transmission and avoid reader-tag collisions. Readers cooperate via network synchronization by a server and a contention-based update strategy to acknowledge tags. An optimal system configured with 4 readers using 16 orthogonal TH sequences is suggested and operates 3 times faster than the theoretical potential of EPC Class-1 Generation-2 protocol with the listen-before-talk scheme. 

Place, publisher, year, edition, pages
Zurich, 2010.
Keyword [en]
IR-UWB, Multi-reader, Orthogonal TH-PPM, Passive RFID, Contention-based, Forward links, Indoor environment, Low delay, Mobile objects, Network synchronization, Physical layers, Real time, Slotted Aloha, Tag collision, Time-hopping, Ultra-high frequency, Ultra-wideband radio, Local area networks, Radio broadcasting, Radio links, Radio transmission, Real time systems, Broadband networks
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-28764DOI: 10.1109/ICCCN.2010.5560163Scopus ID: 2-s2.0-77958512921OAI: oai:DiVA.org:kth-28764DiVA: diva2:389986
Conference
International Conference on Computer Communications and Networks(ICCCN)
Note

QC 20110121. QC 20160214

Available from: 2011-01-20 Created: 2011-01-20 Last updated: 2016-02-14Bibliographically approved
In thesis
1. Hierarchical multi-reader RFID systems for Internet-of-Things
Open this publication in new window or tab >>Hierarchical multi-reader RFID systems for Internet-of-Things
2010 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: US-AB, 2010. xiv,41 p.
Series
Trita-ICT-ECS AVH, ISSN 1653-6363 ; 2010:07
National Category
Information Science
Identifiers
urn:nbn:se:kth:diva-28772 (URN)978-91-7415-817-5 (ISBN)
Presentation
2010-12-14, Sal D, KTH-Forum, Isafjordsgatan 39, Kista, 14:00
Opponent
Supervisors
Note
QC 20110121Available from: 2011-01-21 Created: 2011-01-20Bibliographically approved
2. Networked RFID Systems for the Internet of Things
Open this publication in new window or tab >>Networked RFID Systems for the Internet of Things
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The Internet of Things (IoT) utilizes trillions of uniquely identifiable smart objects to connect anything at anytime and anywhere. Radio frequency identification (RFID) techniques are a powerful promising enabler for realizing the IoT. Around how to build hierarchical networked RFID systems for the IoT, this dissertation formulates and addresses problems in three key areas, i.e., communication protocols, simulation approaches, and RFID applications.

Communication protocols are essential for designing high-performance networked RFID systems. First, we propose to use time hopping pulse-position modulation (TH-PPM) impulse radio ultra wideband (IR-UWB) for the tag-to-reader link. We analyze different parts of the system delay and propose relevant strategies to shorten the delay. Second, we give the concept of code division multiple access (CDMA) UWB RFID systems. We analyze the asynchronous matched filter receiver and decorrelating receiver for multi-tag detection, and propose a new communication process that fully exploits the multiple-access capability of the two detection schemes.

Simulations are widely used to evaluate the performance of wireless networks. We propose a new approach for simulating networked RFID systems with multiple wireless standards within one case in OMNeT++. It is realized by partitioning and modeling the protocol stacks of different standards and designing a multi-radio module. Moreover, we propose a CO-Simulation framework with MATLAB and OMNeT++ (COSMO). COSMO has the ability of self-validation. It combines the strengths of MATLAB and OMNeT++ by compiling prebuilt models in MATLAB to header files and shared libraries and integrating them into OMNeT++.

RFID technology gains popularity because it can be used to track and monitor objects in real time. We implement two typical networked RFID applications, i.e., wide area RFID sensor network and item-level indoor RFID localization. We design a two-layered wide area RFID sensor network for fresh food tracking. It adopts GSM/GPRS for the communication between the server and master nodes, and semi IR-UWB for the communication between master nodes and slave nodes. We develop the control platform and implement the all-in-one sensor nodes. For indoor RFID localization, we give insights about the influence of tag interaction on tag antenna radiation pattern and localization accuracy. Two examples, i.e., the k-NN algorithm and the Simplex algorithm, are taken to show how to utilize tag interaction analysis to improve the design of localization algorithms.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. xvi, 87 p.
Series
Trita-ICT-ECS AVH, ISSN 1653-6363 ; 13:06
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
SRA - ICT
Identifiers
urn:nbn:se:kth:diva-120056 (URN)978-91-7501-695-5 (ISBN)
Public defence
2013-05-07, Sal/Hall D, Forum, ICT-KTH, Isafjordsgatan 39, Kista, 09:00 (English)
Opponent
Supervisors
Note

QC 20130409

Available from: 2013-04-09 Created: 2013-03-26 Last updated: 2013-04-09Bibliographically approved

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Lu, Zhonghai

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