1. UBICOMP SYSTEMS: TOPICS & CHALLENGES

2. New computing model  Heterogeneous devices  Interaction:  Many-to-many  Possibly implicit, invisible, through natural interactions  Networking:  Wireless  Ad-hoc

3. Example: ABC  Bardram, J.E., and Christensen, H.B., 2007, Pervasive computing support for hospitals: An overview of the activity-based computing project. IEEE Pervasive Computing 6(1): 44-51Pervasive computing support for hospitals: An overview of the activity-based computing project

4. Ubicomp systems research  Some core challenges:  Resource impoverished devices (resource-aware computing)  Execution environments: Volatile Heterogeneous Fluctuating  Invisible computing  Security and privacy

5. Resource impoverished devices  Energy:  Consumption  Foraging

6. Reducing consumption  Example:  FSI current wave meter: FSI Sleep/wake f[Hz] ↓

7. Power for wireless comm  Example: in-network processing

8. Foraging  Power  Cyber

9. Volatile execution environments  Volatility:  Devices come and go  Communication structure changes  Service discovery

10. Heterogeneous execution environments  Ubicomp application: may span several devices  Patchwork of technologies:  Bell, G., Dourish, P., 2006, Yesterday’s tomorrows: notes on ubiquitous computing’s dominant vision. Personal Ubiquitous ComputingYesterday’s tomorrows: notes on ubiquitous computing’s dominant vision Better in the future? Is messiness the norm?  Heterogeneous hardware – fundamental!

11. Fluctuating execution environments  PC: static  Ubicomp devices:  Multiple devices  Mobile  Distributed applications

12. Fluctuating execution environments  Research focus areas:  Context-aware computing: User, others present, temperature, light, etc… UCF Chapter 8  Location (location-based computing) A type of context! UCF Chapter 7 LoCA: http://loca2009.context-aware.org/http://loca2009.context-aware.org/  Integration ABC Project54

13. Integration  Example: Project54Project54  Kun, A.L., Miller, W.T., Lenharth, W. H., 2004, Computers in Police Cruisers. IEEE Pervasive Computing 3(4): 34-41 Computers in Police Cruisers

14. Invisible computing  Computers for Weiser’s Sal:  Physically invisible – hidden  Mentally invisible – not centers of attention  How to handle errors, notifications, upgrades?  Some ideas in Friday A. et al., 2005, Guidelines and open issues in systems support for Ubicomp: reflections on UbiSys 2003 and 2004. Personal Ubiquitous ComputingGuidelines and open issues in systems support for Ubicomp: reflections on UbiSys 2003 and 2004

15. Security and privacy  Security = confidentiality, integrity, authenticity of information  Privacy = ability to reveal oneself selectively  UCF Chapter 3

16. Security and privacy - issues  Trust  Assumptions from conventional protocols  Security based on location and context  Privacy challenges  E.g. sensors  Security challenges

17. Sensors, privacy: Minority Report