1. Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems Naeem Esfahani Sam Malek 32th International Conference on Software Engineering (ICSE 2010), New Ideas and Emerging Results (NIER) Department of computer science Fairfax, Virginia, USA

2. Outline Motivation Extended Social Networks Social Activity Schemas Run-time Services –Monitoring –Discovery –Composition and Adaptation Conclusion 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems2

3. Situated Pervasive Software 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems3 New Breed of Systems Role of the system is not completely known at design-time Rapid run-time composition by end-user Requirements may change at run-time A set of interconnected pervasive resources Dynamic and unpredictable Autonomous entities expected to integrate and operate at run-time

4. Challenges A.Semantic knowledge among the resources –Interaction protocols –Different interfaces of a single device B.The complex behavior of the users –Complex requirements –Different contexts C.Which components and users can be trusted D.Where to look for particular resources E.When to initiate change in the system 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems4

5. Social Networks 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems5

6. Agnes’s Heart Monitor Decreasing medical costs –Release patients ASAP –Further supervision is required –State of the art Dumb sensors! Agnes had a surgery –Under supervision of Dr. Ernest Her children usually look after her –Annette and Oliver Requirements –Report heart readings to the doctor –Alert when a dramatic change happens 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems6

7. Social Computing Networks Framework 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems7

8. A subset of Agnes’s Turf Extended Social Networks 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems8

9. SCN – Activity Schemas 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems9

10. Dr Ernest’s Alarm System Social Activity Schemas 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems10 Agnes’s Heart Monitor

11. SCN – Runtime Services 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems11

12. Monitoring Preconditions –When a schema should be executed –E.g., after HeartMonitor is attached to Agnes … Changes in the environment can void preconditions Decrease in Quality of Service –Defined by user defined utility functions –Triggers the adaptation 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems12

13. Discovery Two dimensions –Social relationship: trust by the ESN –Resource type: semantics by the Ontology Three steps for “CellPhone@Child” –Select the turfs with Child relationship to Agnes –Select devices which comply with CellPhone spec –Select one of them based on the policy 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems13

14. Composition and Adaptation Orchestrates Monitoring and Discovery –Triggered by Monitoring –If required changes the environment –Uses Discovery to find resources Adaptation –Void preconditions Stop the resource and register for monitoring –Failed resource (mobility, QoS) Conduct a new Discovery E.g., Annette’s cell-phone runs out of battery 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems14

15. SCN – Addressing Challenges 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems15 B. The complex behavior of the users A. Semantic knowledge among the resources C. Which components and users can be trusted D. Where to look for particular resources E. When to initiate change in the system

16. Conclusion Extended Social Networks (ESN) –Beyond human interactions –Enable sharing pervasive computing resources Described underlying concepts –Trust, Semantics, User requirements, Adaptation Social Computing Networks (SCN) 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems16

17. Questions ?? 02/23/2010Social Computing Networks: A New Paradigm for Engineering Pervasive Software Systems17