RFIDcover: A Coverage Planning Tool for RFID Networks with Mobile Readers. MTP Thesis Presentation by S. Anusha Guide: Prof. Sridhar Iyer. RFID System. Basics Radio Frequency IDentification : use of radio waves RF Tag : a low functionality microchip with an antenna
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MTP Thesis Presentation by
S. Anusha
Guide: Prof. Sridhar Iyer
Basics
RadioFrequencyIDentification:use of radio waves
RF Tag:a low functionality microchip with an antenna
Passive: derives power from readers’ transmission, computationally thin, limits interrogation range.
Active:has its own battery power
Reader:a device that can read/write information from tags
Applications
Identification and Tracking of objects, Access Control
Completely Covering an Area
At all time – Eg. intrusion detection
Placing sufficient number of fixed readers
High deployment costs
Periodically, within every T seconds – Eg. inventory check
Can use mobile readers
Cost-effective
Challenge:to determine the number of readers, their movement, their velocity etc.
Fixed size circles covering rectangle
Non-overlapping cover
Optimal coverage - 90.69%
Overlapping cover
Optimal density - 1.209
Fopt = 2√3XY/9r2
where
X, Y : dimensions of area
r : interrogation range
Example
10mx10m and r=2m, Fopt = 10
50mx50m and r=2m, Fopt = 241
where
r : interrogation range
v : velocity
T : period T
where
X, Y : dimensions of area
Purpose
Given an application scenario and reader specifications, RFIDcover automatically determines the number of readers required, their placement and movement pattern to guarantee complete coverage of an area within the specified period T.
Features
Has an extendible architecture
Permits user to tune additional constraints online
Use
Supermarkets, Warehouse, Libraries ... any place where periodic inventory is needed.
Application Scenario & parameters – say Supermarket with aisle length and inter aisle distance
Reader Specification - interrogation range, interference range, tag reading speed (TRS), unit cost, maximum speed (if mobile)
Topology Specification – dimensions of the min-area bounding rectangle, tag distribution with parameters
Constraints– number of fixed readers, number of mobile readers, maximum tag reading time (TRT), maximum cost, maximum number of slots
Demo of RFIDcover
The Primary Example
The Other Example - Same as above except:
[1] Klaus Finkenzeller. RFID Handbook : Fundamentals and Applications in Contactless Smart Cards and Identification. Chichester : John Wiley, Leipzig, dritte edition, 2003.
[2] Radio Frequency Identification - A Basic Primer. White Paper, AIM Inc WP-98/002R2, August 2001 http://www.aimglobal.org/
[3] http://mathworld.wolfram.com/CirclePacking.html
[4] Richard Kershner. The Number of Circles Covering a Set. In American Journal of Mathematics, volume 61, page 665, July 1939.
[5] Yi Guo and Zhihua Qu. Coverage Control for a Mobile Robot Patrolling a Dynamic and Uncertain Environment. Proceedings of World Congress on Intelligent Control and Automation, June 2004.
[6] Daniel W. Engels. The Reader Collision Problem. Technical report, EPC Global, 2002. http://www.epcglobal.org/
[7] J. Waldrop, D. W. Engels, and S. E. Sarma. Colorwave: An anticollison algorithm for the reader collision problem. In IEEE Wireless Communications and Networking Conference (WCNC), 2003.
[8] Draft paper on Characteristics of RFID-systems. White Paper, AIM Inc WP-98/002R2, July 2000.
[9] A Basic Introduction to RFID Technology and its use in Supply Chain. Technical report, Laran Technologies, January 2004.
Prof. Sridhar Iyer
Research Scholars and members of the Mobile Computing Research Group at KReSIT
My batchmates B. Nagaprabhanjan, Charu Tiwari and Shailesh M. Birari
My sincere thanks to