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Information Modelling and Sharing for RFID-Equipped Objects
Harri Hämäläinen
WAWC’07 – Work In Progress -session
Lappeenranta, August 16th 2007
Content
- Introduction- Current approaches for adopting RFID- ”Hybrid-model”- Use cases- Conclusions
Quote
”(In a conference) I’d like to know whom I have met before, when and in which context?”
Prof. Josef Noll
August 15th 2007
…relations…parents…childs…classmates…location…income…
Introduction to RFID
- Should RFID just be considered as an identification technology?
- Different types of tags- Read-only or read/write- Passive, active, semi-passive
- RFID technology and Information Services and their meaning are often mixed while speaking of centralized or distrubuted models
- Hype?
Item and information relations
- Relatively low read rate (especially with low-price tags) requires alternate solutions if there is a need to identify multiple objects- Transportations and other parts of
supply chain- Need for hierarchical modelling of
information in databases- Location etc. information can be
shared to other objects
”Tag-based” Model
- Information about the product is stored in the tag itself
- No need for centralized information systems- Rules between partners have to be set to make
the information readable (e.g. xml schemas)- The information is only available when a tag is in
read range- Linking of information between products partly
useless
EPCglobal Network Model
- Each tag has a unique ID- Information gathered during the lifecycle and
stored into an information service that may have links to other services
- Fundamental issues- Radio Frequency Identification (RFID)- Electronic Product Code (EPC)- Object Naming Service (ONS)- Product Markup Language (PML)- Information Services
Wireless Sensor Networks
- Autonomous devices- Could measure temperature,
sound, vibration, pressure,…- Radio tranceiver,
microcontroller and battery- Communicates with each other- E.g. ZigBee
Hybrid model & policies
- A combination of the two approaches- Sharing the item related information
also between the items in real time (=>communication)
- Making decisions based on available information
- Handling instructions, rules and description stored- In a product itself- Company policies- Rules set by other instances
- Intelligence in IS or Middleware- Instant decision making
Information Server &RFID Middleware
RFID Tag
Internet
Sample use cases
- Having detailed information- Spare parts
- Controlling the warehousing and environment requirements- Location / warehouse / transport control- Temperature control for a product- Other conditions (e.g. fireworks/dynamite or other
hazardous material)- Mobility
Conclusions
- Relatively low read success rate requires alternate solutions
- Need for hierarchical modelling of information in databases
- Sharing the available information between the objects- So called ”Hybrid model”, one step towards
sensor networks for RFID?
Contacts
Harri Hämälä[email protected]
Jari [email protected]
Lappeenranta University of Technology
P.O.Box 20
FIN-53851 Lappeenranta
FINLAND
Tel: +358 5 621 11
Fax: +358 5 621 2350