Research Position available

[Gabriele Kotsis]

The department of Applied Computer Science, University of Vienna, is
offering a

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        ***     Research Position in Network Traffic Modeling     ***
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Applicants should have knowledge in (one or more of) the following areas:

	+ network simulation tools (bones, OPNET, ns, ...)
        + discrete event simulation
        + computer networks
        + programming skills (C, C++, ...)
        + network traffic characterization

Starting Date: immediately
Duration: 12-15 month
further conditions negotiable (e.g. part time working contract)


Project Synopsis

In order to efficiently handle multimedia applications across networks in 
general, and through the air interface in particular, appropriate network 
capacity management mechanisms are necessary. Network capacity planning 
is the practice of anticipating the future needs of networked users, and 
designing and managing the network resources accordingly. Two key issues 
play a dominating role, first the characterisation of the type and quality 
of service a user expects from the network, and second, the characterisation 
of the type and quantity of load a user generates into the network.

The goal of this EC funded research project is to develop network system 
and network traffic models based upon profiles of user behaviour. The study 
will establish insight on how new multimedia and network computing 
technologies (like e.g. Java, CORBA, VRML) will influence network performance, 
and maybe alter user behaviour. The mapping and implications of QoS parameters 
at various system levels (network-perceived QoS, user-perceived QoS) will 
be investigated. The means for network model evaluation are large-scale 
discrete event simulations. The simulation results will be compared with 
measurement results from a test-bed to verify the simulation models.
Investigations will encompass the characteristics of Low-Earth-Orbit (LEO) 
and Geostationary-Orbit (GEO) satellite constellations, yielding modular 
satellite network models. The user behaviour and application characteristic 
models will then be integrated in order to carry out simulations to verify 
that the application receives the level of service it requires while 
efficiently using the capacity of the air interface. 

For more information, contact 

        Gabriele Kotsis (gabi@ani.univie.ac.at)

* * * * * * * * * 
* Gabriele Kotsis                                   Lenaugasse 2/8
*                                                      A-1080 Wien
* Institut fuer Angewandte Informatik                  Oesterreich
*    und Informationssysteme              Voice +43 1 408 63 66 14
* Universitaet Wien                          Fax   +43 1 408 04 50
*                                            gabi@ani.univie.ac.at
*          http://www.ani.univie.ac.at/~gabi/Kotsis.html