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): 44-51

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:

Sleep/wake f[Hz]↓

current meter and pressuresensor in frame

tilt

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 Computing 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: http://loca2009.context-aware.org/

Integration ABC Project54

Integration

Example: Project54 Kun, A.L., Miller,

W.T., Lenharth, W. H., 2004, Computers in Police Cruisers. IEEE Pervasive Computing 3(4): 34-41

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 Computing

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