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