compu

1. 1
© 2007 by Leszek T. Lilien
Based on: M. Satyanarayanan, “Pervasive Computing: Vision and Challenges,” IEEE Personal Communications, 2001
Pervasive Computing vs. Distributed Systems & Mobile Computing (58)
Drilling Down - The Difficult Problems (35)
 Impact on System Layering – some research questions:
 How can the benefits of layering be preserved while
accommodating the needs of pervasive computing?
 What is the impact of these accommodations on efficiency and
maintainability?
 Are existing layers best extended for pervasive computing
by broadening their primary interfaces or by creating
secondary interfaces?
 Such as the SNMP network management interface [7]?
 When creating a new layer, are there systematic
guidelines we can offer to ensure compatibility with the
needs of pervasive computing?
 How much harder is it to design and implement such a layer?

2. 2
© 2007 by Leszek T. Lilien
Based on: M. Satyanarayanan, “Pervasive Computing: Vision and Challenges,” IEEE Personal Communications, 2001
Pervasive Computing vs. Distributed Systems & Mobile Computing (59)
5. Conclusion
 Pervasive computing will be a fertile source of challenging
research problems in computer systems for many years to
come
 Solving these problems will require us:
 To broaden our discourse on some topics, and
 To revisit long-standing design assumptions in others
 To address research challenges in areas outside
computer systems, including:
 Human-computer interaction
 Esp. multi-modal interactions & human-centric h/w designs
 Software agents
 Specific relevance to high-level proactive behavior
 Expert systems and artificial intelligence
 Esp. in the areas of decision making and planning
 Capabilities from these areas will need to be integrated
with the PERV systems capabilities
 Pervasive computing will thus be the crucible in which many
disjoint areas of research are fused

3. 3
© 2007 by Leszek T. Lilien
Based on: M. Satyanarayanan, “Pervasive Computing: Vision and Challenges,” IEEE Personal Communications, 2001
Pervasive Computing vs. Distributed Systems & Mobile Computing (60)
Conclusion – cont.
 When describing his vision, Weiser was fully aware that
attaining it would require tremendous creativity and effort by
many people, sustained over many years
 The early decades of the 21st century will be a period of
excitement and ferment in PERV research
 New h/w technologies converge with research progress on the many
fundamental problems discussed in this paper
 Like the Frontier of the American West in the early 19th
century, pervasive computing offers new beginnings for the
adventurous and the restless
 A rich open space where the rules have yet to be written and the
borders yet to be drawn

4. 4
© 2007 by Leszek T. Lilien
Based on: M. Satyanarayanan, “Pervasive Computing: Vision and Challenges,” IEEE Personal Communications, 2001
Pervasive Computing vs. Distributed Systems & Mobile Computing (61)
References
 See the original paper:
 M. Satyanarayanan, “Pervasive Computing: Vision and
Challenges,” IEEE Personal Communications, 2001
 Available at:
 http://www.cs.cmu.edu/~aura/docdir/pcs01.pdf

5. End of Lecture 0:
Introduction to Pervasive Computing