Dave Parry AURA Lab, Auckland University of Technology http://elena.aut.ac.nz/homepages/aura_rfid/ (30/09/09, MHealth Workshop, 12.15)

1. RFID and Autoidentification Dave Parry Director AUT RFID (AURA) laboratory [email_address] http://elena.aut.ac.nz/homepages/aura_rfid/

4. Passive RFID Action RFID tag RFID Interrogator 1. Interrogator sends RF pulse 2. Tag picks up pulse, energises chip 4. Interrogator interprets data 3. Data from chip, broadcast back

5. Types of Tag Radio Frequency used Tag Class EPC – electronic product code - www.epcglobalinc.org/ EPC Device Class Definition Programming Class 0 “ read only” passive tags Programmed by the manufacturer Class 1 “ write-once, read-many” passive tags Programmed by the customer, can’t be reprogrammed Class 2 Rewritable passive tags Reprogrammable Class 3 Semi-passive tags Reprogrammable Class 4 Active tags Reprogrammable Band Unlicensed Frequency Reading Range LF 125-134.2 KHz <0.5 meter HF 14.56 MHz ~ 1 meter UHF 865.5-867.6 MHz (Europe) 915 MHz (US) ~ 4 to 5 meters Microwave 2.4 GHz ~1 meter

6. The RFID Niche Cost Intelligence Mobile phones SunSpots, Motes Laptops PDA’s RFID

12. Sequence of actions Turn system on Use tag to choose function Return to waiting state Perform function System User Text to speech Present tagged objects

15. Representing location

17. Movement recording