UBICOMP SYSTEMS: TOPICS & CHALLENGES

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

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

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

Resource impoverished devices  Energy:  Consumption  Foraging

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

Power for wireless comm  Example: in-network processing

Foraging  Power  Cyber

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

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!

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

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:  Integration ABC Project54

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

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 Personal Ubiquitous ComputingGuidelines and open issues in systems support for Ubicomp: reflections on UbiSys 2003 and 2004

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

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

Sensors, privacy: Minority Report