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Presentation to ERCIM Emobility working group Kickoff meeting, Basel, Switzerland,

R&D on Pervasive/Ubiquitous Computing at the Institute of Informatics, University of Namur, Belgium. Presentation to ERCIM Emobility working group Kickoff meeting, Basel, Switzerland, October 27 2006. General introduction. The Institute of Informatics Established in 1970

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Presentation to ERCIM Emobility working group Kickoff meeting, Basel, Switzerland,

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  1. R&D on Pervasive/Ubiquitous Computingat the Institute of Informatics,University of Namur, Belgium Presentation to ERCIM Emobility working group Kickoff meeting, Basel, Switzerland, October 27 2006

  2. General introduction The Institute of Informatics • Established in 1970 • Bachelor, Master, PhD programs in Information Systems, Software Engineering and Computer Science • Staff • 15 professors • 50 research assistants • 10 PhD students • 7 administrative and support staff members • Students • 300+ currently enrolled • 1,500+ graduated since 1970

  3. Pervasive/Ubiquitous Computing 3 fields of expertise • Infrastructures • Coordination models • Code analysis and optimisation 3 research focuses • RRM • Random access networks • Java bytecode optimisation 3 professors • Jean-Marie JACQUET (JMJ) • Laurent SCHUMACHER (LSc) • Wim VANHOOF (WVa) WVa JMJ Competing systems optimisation Optimisation Coordination Pervasive computing Radio Resource Management Java Optimisation Infrastructures LSc

  4. Field expertise #1 – Infrastructures RNC NodeB #1 NodeB #2 NodeB #3 NodeB #4 UEs

  5. Field expertise #2 – Coordination models • Interaction model for asynchronous systems (e.g. web request/response) • Common blackboard for concurrent data sharing between processes • Paradigm extended with • virtual blackboards • real-time primitives • mobile processes tell get ask nask Blackboard Primitives P1 P2 P3 Processes Bb #1 Bb #2 P1

  6. Field expertise #3 – Code optimisation • Embedded systems have limited capabilities w.r.t. power, memory, CPU. Nevertheless, new applications demand ever more resources. • Code running on such systems should be optimised accordingly • What kind of optimisations? • Improving execution speed • Lowering memory usage • Lowering power usage • In-house expertise on analysis, transformation and optimisation of (declarative) programming languages.

  7. Research focus #1 – Radio Resource Management • Spreading code allocation in CDMA-based networks dealt with as a constraint-based programming problem • To be generalised to shared media/resource networks (e.g. FDMA, TDMA, OFDMA) Orthogonal Variable Spreading Factor (OVSF) tree

  8. Temporary communication channel Research focus #2- Random access networks • Process communication modelled with temporary channels instead of shared blackboards • Birth/death process of channels based on neighbour discovery • Suited for modelling multiple access in ad hoc and Disruption Tolerant (DTN) networks Model of communication between processes

  9. Research focus #3 – Java bytecode optimisationfor embedded systems • Java regarded useful for portability • Java run-time environment however not optimised for embedded systems • Some examples • Java vulnerable to memory leak or stack overflow • Undeterministic behaviour of Java VM due to the garbage collector which is triggered unpredictably/irregularly → Memory consumption is hard to predict → Execution time is hard to predict • Research topics • A Java VM which behaves (more) deterministically • Compile-time garbage collection for Java (as developed for declarative languages like Haskell, Mercury)

  10. Additional information • IPv6 Linux-based UTRAN Testbed http://www.info.fundp.ac.be/~hvp/rech/doc/index_en.html • Personal web pages http://www.info.fundp.ac.be/~jmj/ http://www.info.fundp.ac.be/~lsc/ http://www.info.fundp.ac.be/~wva/

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