Contextaware applications using personal sensors

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Context-aware applicationsusing personal sensors
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Outline

• Introduction
• Context sensors
• Framework
• Application Wake me up
• Conclusion

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Context aware applications

• Take into account the context
• Require information about the situation/environmen
  t
• Wide field of application in mobile environment

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Context sensors

• Provide contextual informations
• Raw data from the sensors have to be interpreted
  into contextual knowledge
• Information delivered from multiple sensors -gt
  Context

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Multi-agent framework

• Entities of the system are heterogenous and
  distributed
• Sensors
• Context interpreter
• Personal assistant
• -gt A MAS approach is relevant

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Two types of agent

• Context agent
• Capture raw context data using sensor(s)
• Interpret the data using his knowledge
• Provide the extracted knowledge to the system
• Personal agent
• Has information about the user's profile
• Deliver service to the user according to the
  profile and the context information

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Sensors-based context agent

• Four levels in the
• architecture
• 1. Sensors
• 2. Receiver
• 3. Interpreter
• 4. Synthesizer

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Personal agent

• Knowledge about users profile
• Preferences
• History
• Decision is lead by
• Contextual knowledge delivered by context agents
• Users predicates

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Knowledge management
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Knowledge management 2

• Virtual Knowledge Communities
• means for agents to share knowledge about a
  topic.
• Implemented at the IAKS FIPA Compliant
  prototype
• Principles
• agents can join or create a community on a topic
• share knowledge using ontology representation

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Knowledge management 3

• Advantages of VKC
• Exchange of high level knowledge
• Allow interoperability within the systems
• Dynamic communities

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Wake me up

• Scenario Wake up asleeped metro passenger
• Context agents
• Delivers users activity level using sensors and
  HBR algorithm
• Delivers stations name
• Personal Assistants knowledge desired station
• If the user is sleeping and the subway is
  reaching the desired station, the cell phone will
  wake up the user.

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Example 1
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Communication
Sensors to cell phone bluetooth Cell phone to
station WLAN
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Conclusion

• We defined a framework for dynamic context aware
  applications using high level representation
• The framework allows the design of a broad range
  of applications (used for wake me up, maps, help
  for disabled).