Intelligent%20Information%20System%20lab.

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Context Aware Middlewarefor Ubiquitous
Home-network

• Intelligent Information System lab.
• Sohn Jong-Soo

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0. Contents

• 1. Definition of Context
• 2. Why middleware for context awareness
• 3. Characteristics of middleware for context
  awareness
• 4. Middleware for context awareness in Ubiquitous
  computing environment
• 5. EPC network
• 6. Conclusion
• 7. References

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1. Definition of Context

• Anind K. Dey
• Any information that can be used to characterize
  the situation of an entity, where an entity can
  be a person, place, or physical or computational
  object.
• Entity is considered relevant to the interaction
  between a user and an application, including the
  user and application themselves.
• Anind K. Dey, Providing Architectural Support
  for Building Context Aware Applications, PhD
  thesis, GATECH, Nov. 2000.
• entity? ??? ?? ??? ??? ?? ??.(entity ??, ??,
  ??? ?? ??? ??)
• entity? ??? ??????? ???? ??? ???????? ????? ????.

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1. Definition of Context

• Computing context
• ??? ????? context
• network connectivity, communication cost,
  bandwidth, nearby resources (printers, displays,
  PCs)
• User context
• ??? ?? context
• users profile, location, identities of nearby
  people, social situation, activity
• Physical context
• ??? ????? context
• temperature, lighting, noise, traffic conditions

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2. Why a middleware for context awareness?

• ????? ?? ??? context? ??
• Computing? ??? ??????? ??????? ??
• Any where, any time? ????? ?? ??? ??
• Computing ??? ?? ??? ??? computing? ????? ???
  ????? ????
• ??? ?? ?? ? ??? ??? ?? ? ??
• ??? ?? ???? ? ????? computing? ??? ??

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2. Why a middleware for context awareness?
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2. Why a middleware for context awareness?

• Context awareness? ?? ? ?? ????
• Toolkit
• ?? ?? context awareness ?????? ??? ?? ????? ??
• ??? ??? ???? ??
• ???? ???? ?? ???? ??
• ?? context awareness ???????? ??? context?????
• Middleware for context awareness
• context awareness ??? ??? ??
• ??? ?? ? ????? ????? ?? (???)
• ??? ?????? ????? ??

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3. Characteristics of middleware for context
awareness

• Multi-sensor, multi-agent
• ?? ??? ????? ??? ??
• ?? ??? ????? ??? ??
• Higher level context
• Low level context??? higher level context? ???
  ???? ?
• First order logic, fuzzy logic, etc..
• Easy understanding
• Context??? ???? ??? ? ??? ? ??? ???? ?? ??? ????
• Interoperability
• ??, ???? ?????? ?? ??? ??

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3. Characteristics of middleware for context
awareness

• Common ubi-middlewares
• For instance JINI, CORBA, UPNP .. etc
• ???? ? ??(semantic)??? ?? ??
• ??? context? ??? ???? ?? ?? ???? ??
• Context awareness middleware
• The context toolkit
• GAIA project
• EPC network

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4. Middleware for context awarenessin
Ubi-computing Env.

• The context toolkit (1)
• Anind Dey, et al
• Context aware application? ?? ??????? ?? toolkit
  ??
• 5?? ????? ??
• Context widget
• ????? ??? ?????? interpreter? server? ??
• Interpreter
• Low level context?? ???? high level context? ??
• Aggregator
• ??? entity? ?? context? ?? ???????? ??
• Service
• Aggregator? context ??? ?? (sensing?? ??)
• discoverer
• ?? ??? service? ??

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4. Middleware for context awarenessin
Ubi-computing Env.

• The context toolkit (2)
• ?? ???? context awareness middleware??? ?? ???
  ??? ??
• Context? ?? ??? ????? ?? ???? ??

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4. Middleware for context awarenessin
Ubi-computing Env.

• GAIA project
• Anand Ranganathan et al. (Ilinois Univ.)
• http//gaia.cs.uiuc.edu/index.html
• Context ??? ??? ??
• ?? context? ??? rule-based ?? ????? ??? ????? ??
  ??? ?? ? ??? ??
• ?? context? ??? ? ??? ?? ??? ontology ??? ??
• ??? ????? learning mechanism? ??
• First order logic, temporal logic, description
  logic, higher order logic, fuzzy logic .. etc.

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4. Middleware for context awarenessin
Ubi-computing Env.

• GAIA project (2)

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4. Middleware for context awarenessin
Ubi-computing Env.

• GAIA project (3)
• context providers
• data source? sensor? ??
• agent? query? ?? ? ??? ?
• event channel? ?? context provider? context
  event? ??
• agent? context information? ???? event channel?
  context information? ??
• context synthesizers
• ?? context provider?? information? ????
• context information? ?? ??? (higher) context? ??
• context consumers (context-aware application,
  agent)
• context provider? context synthesizer?? ??? ??
  agent
• context? ???? ??? ??, ??(behavior)? ??

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4. Middleware for context awarenessin
Ubi-computing Env.

• GAIA project (4)
• The context predicate
• context? ??? ????? convention? ??
• ontology?? ?? ????? ??
• ex)
• Location ( chris , entering , room 3231)
• Temperature ( room 3231 , , 98 F)
• Sister( venus , serena)
• StockQuote( msft , gt , 60)
• PrinterStatus( srgalw1 printer queue , is ,
  empty)
• Time( New York , lt , 1200 01/01/01)
• Location ( chris, entering, room3231)
• type person, Object ???, ?? ???, ??

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4. Middleware for context awarenessin
Ubi-computing Env.

• GAIA project (5)
• Ontologies to describe context predicates
• OWL (Web Ontology Language) ??
• Ontology? context? ??(validity)
• Smart device?? ??? ?? ????? ??
• Sensing ??? ???? ??

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5. EPC network

• Why use RFID/USN in Ubi-computing environment
• ?? ??? ?? ??? ??? ?? ?? ??
• RFID code, context
• ???? ??? ?? ??? ?? sensing ?? ? ??? ??? ???
  sensor network? Ubiquitous???? ??
• Sensor network, context awareness
• Ubiquitous computing ??? ???? ?? ??? ??? ??? ????
  ??

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5. EPC network

• RFID ????
• EPC (Electric Product Code)
• Auto-ID???? ???? ?? ?? ????
• ?? ?? ????
• ISO/IEC 15963
• ISO/IEC SC31/WG4?? ??? ?? ??
• ????? ???? ??? ???? ??? 4?? ???? ??
• U-code (Ubiquitous identification code)
• ?? U-ID ???? ??? ????
• ? ISO/IEC 15963? ?? ??

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5. EPC network

• RFID/USN middleware? ??
• ??? RFID ???? ???? ??? ?? ???? ??, ???
• ??? ???? ???? ??? ???? ?? ????? ???? ??? S/W
• ETRI - ???????? ?20? ?3? 2005? 6?
• RFID/USN middleware ??? ???
• ??? ?????? ? ???? ???? ????? ??
• ????? ???? ???? ???? ??
• Hardware? software? ???? ?????? ??? ??
• ??? ?? DB? ??

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5. EPC network

• Infrastructure of EPC network

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5. EPC network

• EPC network? ??
• FC Middleware
• ????? ??? ???? ??? ?? ???? ????? ??? ??
• ALE
• ?? ???? ??/??
• ??/??? ??? middleware?? EPC capturing
  application?? ??
• EPC capturing application
• ?? ?? ??????? ?? ????? ????? EPCIS? ??
• EPCIS-enabled repository
• EPCIS? ??? ??? ??/??
• ?? ??? ??
• EPCIS accessing application, partner application
• EPCIS?? ???? ?????? ?? EPCIS?? ???? ?? EPC? ???
  ??? ??, ?? ?? ??? ???? ??????? ???? ??? ??
• EPC discovery service
• EPC? ??? ???? ????
• ?? EPC? ??? ???? ???? ?? EPCIS? ???? ??? ??? ????
  ?? ??? ???

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5. EPC network

• ONS??
• Local server
• ???? ???? ??
• ONS? PML???? ????
• ONS
• ?? EPC??? ????PML? ??? ??
• PML server
• ?? EPC? ?? ? ??? ?? ?? ??

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5. EPC network

• PML (Physical Markup Language)
• PML core sensor models is comprised of the
  following components
• sensors
• ??? ??? ??? ?? ?? ??? ?
• observations
• ??? ?? ??? ?
• observables
• ??? ?? ??? ? ?? ??? ??, ??
• ??? EPC ?? ?? ???? ???? ??
• ??? ?? ??, ???? ? context? ????? ?? ???? ??? ??

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5. Conclusion

• Context awareness middleware ??? ??? ?? ???
  ?????? ??? ? ??? ????? ?? ?? ????? ??? ??
• Ubiquitous? ?? ??? ????? RFID/USN? ??? ??? ??
• ????? ?? ???/??? ??? ???? context awareness ???
  ??
• RFID/USN middleware level??? context awareness???
  ?? ???? ??

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5. References

• PML Core spec 1.0
• A Middleware for Context-Aware Agents in
  Ubiquitous Computing EnvironmentsAnand
  Ranganathan , Roy H. Campbell
• Ubiquitous Computing Environment?? ???? ??
  middleware ??. ??? ?
• ???? ??? ?? ????. ETRI. ???, ???
• Mark Weiser The Computer for the 21st Century,
  Scientific American, vol.253, no.3, pp.94-104,
  Sep. 1991
• Anind K. Dey, Providing Architectural Support
  for Building Context Aware Applications, PhD
  thesis, GATECH, Nov. 2000.
• ????? ?? ??? ??. ???. TTA??.
• http//www.autoidlabs.org/
• http//www.epcglobalinc.org/
• A Survey on middleware for context awareness in
  ubiquitous computing environment N.Q.Hung et al.
  ETRI??