Mobile Devices and Systems Lesson 04 Smart Systems Labels, RFID and tokens

Transcription

1 Mobile Devices and Systems Lesson 04 Smart Systems Labels, RFID and tokens Oxford University Press All rights reserved. 1

2 Smart systems Smart Labels Smart labels RFID Smart tokens Oxford University Press All rights reserved. 2

3 Smart Labels Smart Labels multiple applications in our day-to-day lives in their numerous forms such as identification Labels, key Labels, etc. Oxford University Press All rights reserved. 3

4 Label Serves the purpose of identifying the contents of a package A barcode label on a book packs in information about the publisher, title, author, publishing date, and reprint edition of a book Barcode labels also used in stores so that a reading machine can identify the product and its price. Oxford University Press All rights reserved. 4

5 Label differs from a card in terms of thickness and visibility A label using wireless means for product identification can be concealed inside the product Oxford University Press All rights reserved. 5

6 Smart Label Has a processor, memory, transceiver, and antenna similar to a contactless smart card Smart labels are essentially an earlier version of the now popular RFID tags Powered by the received signals just like smart cards Smart label need not be visible when implanted into a product or package. Oxford University Press All rights reserved. 6

7 Network of labels Oxford University Press All rights reserved. 7

8 Software in label Oxford University Press All rights reserved. 8

9 Access point software for label Oxford University Press All rights reserved. 9

10 Smart Labels Network Networked together using a central reading and computational device (host) or PC Cluster of labels form a network similar to a LAN network Collision-sense-and-avoidance protocol used so that multiple labels are not allocated the same ID tag and the central server can uniquely identify each one Oxford University Press All rights reserved. 10

11 Smart Labels Use secured hardware and serverauthentication software The central server also detect the removal of a labelled product or packet from a product-shelf and raises alarm in case the product does not reach the destined point, for example the cash counter in a store Oxford University Press All rights reserved. 11

12 RFID automatic identification method Remote storage and retrieval of data on RFID tags RFID tags are objects that when tagged (attached) onto people, products, or animals enable their identification using radio waves from a nearby source RFID tags or labels contain integrated circuit chips and antennas. Oxford University Press All rights reserved. 12

13 RFID computations and Data transfer rates Usually limited to transmission of the tags contents Data transfer rates of up to 115 kbps with signals from 915 MHz, 868 MHz (at the higher end of the spectrum to 315 MHz and 27 MHz (at the lower end of the spectrum) Oxford University Press All rights reserved. 13

14 RFID tag Each one monitored by a hotspot in the vicinity of the tag A line-of-sight access The hotspot computer and wireless transceivers transmits and receive signals from the RFID tags Oxford University Press All rights reserved. 14

15 RFID tag hotspots The hotspots connect to the Internet through a leased line, wireless, or mobile services. A mobile device or PC with a wireless interface is programmed to function as the hotspot. Oxford University Press All rights reserved. 15

16 RFID and Hot spot Oxford University Press All rights reserved. 16

17 Smart Token Used for authentication purposes before an action, such as granting entry into a restricted area, is initiated A smart token an encapsulated chip including an embedded processor and a memory Token sizes small, usually of the order of a shirt button or a pen nib Oxford University Press All rights reserved. 17

18 Smart Token Protocols Use either a wire-based protocol and communicate at 16 to 128 kbps or ASK Mbps for contact-less communication. Oxford University Press All rights reserved. 18

19 Token Applications A smart token for granting permissions to employees to enter a work place. A smart token to remotely open the car doors Oxford University Press All rights reserved. 19

20 Token Applications Defence departments can accept only authenticated parcels. A smart token in a button form concealed within a parcel and used for authentication of supplies sent to defence departments Oxford University Press All rights reserved. 20

21 Summary Smart Label computer, memory and transceiver Network of labels Hotspot RFIDs Tokens Oxford University Press All rights reserved. 21

22 End of Lesson 04 Smart Systems Labels, RFID and tokens Oxford University Press All rights reserved. 22