CAT

1
CAT Problem to solve

• We want mobile devices to be able to easily share
  sensor data with one another.
• Sharing sensor data (or context) is also called
  remote sensing.

2
CAT Example problem

• Each mobile device such as a laptop, PDA, or
  wearable computer may have sensors that give the
  device context such as temperature or GPS
  location.
• You might want to tell your friends where you
  are, or inform someone miles away what the
  weather is like.

3
CAT The solution

• Build a context-aware framework that can
• Get context from local sensors.
• And share context with other agents. (remote
  sensing)

4
CAT The Solution

• CAT - Context Aware Toolkit
• Provides access to all local sensor data.
• Create SIGs (Special Interest Groups) for sharing
  sensor data with only the people you want to.
• Keeps a history of all sensor data.
• Predict future sensor data.
• Facilitates P2P communication.

5
CAT Context Aware Toolkit

• The framework is composed of independent
  components that work together and share data
  through an event-listener design.
• Components
• Sensor manages all sensors.
• SIG manages the SIGs.
• History manages access to past sensor data.
• CAT Manager oversees all components.

6
CAT Context Aware Toolkit

• Using all of the provided features of CAT may not
  be easy.
• So, similar to the OCSF framework, there is an
  abstract class you can extend to aid in
  developing applications using CAT.
• The abstract class takes care of basic functions
  that an application using CAT must perform.

7
CAT Context Aware Toolkit

• What the CAT application does
• Create the ContextManger.
• Listen to desired sensors pertaining to your app.
• Handle SIG and Sensor events.
• Access sensor history.
• Create SIGs, and join SIGs.
• P2P communication.

8
CAT Context Aware Toolkit

• More information about CAT and example
  applications can be found at
• http//www.cs.uoregon.edu/jprideau/CAT
• CAT Abstract Application
• CAT Example Application