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Note! This project has already ended (31.12.2000)

COST 257

1. COST in general

COST (European Cooperation in the field of Scientific and Technical Research) is a framework for scientific and technical research cooperation among european countries. COST activities were started in the early 70's by 19 countries and includes currently 25 coutries with members also from the eastern European countries. By nature, the research within COST is usually basic or precompetetive research as well as public utility.

 COST activities include research in many fields, e.g. telecommunications, physics, informatics, meteorology. The four principles governing COST activities within these fields are:

  1. All COST member countries, as well as the European Commission, can propose COST Actions.
  2. Participation in these Actions is voluntary and associating only interested countries.
  3. The research to be coordinated is funded nationally. The coordination costs are funded both by the participating countries and by the European Commission.
  4. A COST Action aims to coordinate national research at a European level (concerted action). The work undertaken by each Action is administered by a Management Committee.
More general information on COST can be found at the Official COST Homepage. Additional information about the COST activities within the field of telecommunications can be found at the COST Telecommunication home page.

2. COST 257

COST 257 is the latest in a series of COST Actions on traffic theory for broadband networks. It is a 4 year project and it started in Nov 1996. The COST Actions on traffic theory began in the mid 80's with COST 214, which was followed by COST 224 and COST 242. Currently COST 257 has participants from most of Europe's leading universities and research institues.

The purpose of COST 257 Action is to improve the design of broadband multiservice switching systems and network architecture. The aim is to identify potential impacts of the new telecommunications services on network architecture and performance. The title of the Action is "Impacts of New Services on the Architecture and Performance of Broadband Networks".

More information on COST 257 can be found from the COST 257 Homepage. Technical documents are also available there.

3. COST 257 Research in Finland

VTT has taken part in COST research on traffic theory from 1986. In COST 257 VTT is the project coordinator for the research done in Finland. The Laboratory of Telecommunications Technology at HUT joined the project in the beginning of 1997.

The funding comes from the following institutes:

The research activities currently included in the project are:

Publications

Note! Those publications for which the copyright has been transferred to the publisher may not be available on-line. If you need a copy of such a paper, simply contact via e-mail the first author of the paper (firstname.lastname@hut.fi).

Journal Papers

  1. E. Nyberg, J. Virtamo and S. Aalto, An Exact End-to-End Blocking Probability Algorithm for Multicast Networks, Performance Evaluation, vol. 54, no. 4, pp. 311-330, 2003 (pdf)(bib)(abstract)
  2. S. Aalto, Required work in the M/M/1 queue, with application in IP packet processing, Telecommunication Systems, vol. 16, 3,4, pp. 555-560, 2001 (link)(bib)(abstract)
  3. J. Karvo, O. Martikainen, J. Virtamo and S. Aalto, Blocking of dynamic multicast connections, Telecommunication Systems, vol. 16, 3,4, pp. 467-481, 2001 (link)(bib)(abstract)
  4. P. Lassila and J. Virtamo, Variance Reduction in Monte Carlo Simulation of Product Form Systems, IEE Electronics Letters, vol. 34, no. 12, 1998 (link)(bib)(abstract)

Conference Papers

  1. E. Hyytiä and J. Virtamo, Dynamic Routing and Wavelength Assignment Using First Policy Iteration, in The Fifth Symposium on Computers and Communications (ISCC'00), pp. 146-151, 2000, Antibes - Juan Les Pins, France (pdf)(bib)(abstract)
  2. E. Nyberg, J. Virtamo and S. Aalto, An exact algorithm for calculating blocking probabilities in multicast networks, in Networking 2000, pp. 275-286, 2000, Paris, France (bib)(abstract)
  3. E. Hyytiä and J. Virtamo, Dynamic Routing and Wavelength Assignment Using First Policy Iteration, Inhomogeneous case, in Performance and QoS of Next Generation Networking, pp. 301-316, 2000, Nagoya, Japan (bib)(abstract)
  4. S. Aalto, Required work in the M/M/1 queue, in the 4th INFORMS Telecommunications Conference, 1998, Boca Raton, Florida, published later in Selected Proceedings in Telecommunication Systems (bib)(abstract)
  5. J. Karvo, J. Virtamo, S. Aalto and O. Martikainen, Blocking of dynamic multicast connections, in the 4th INFORMS Telecommunications Conference, 1998, Boca Raton, Florida, published later in Selected Proceedings in Telecommunication Systems (bib)(abstract)
  6. J. Karvo, J. Virtamo, S. Aalto and O. Martikainen, Blocking of dynamic multicast connections in a single link, in the Proceedings of the 4th International Conference on Broadband Communications (BC'98), IFIP TC6-WG6.2, ''The future of telecommunications'', pp. 473-483, Chapman & Hall, London, 1998, Stuttgart, Germany (pdf)(bib)(abstract)
  7. P. Lassila and J. Virtamo, Using Gibbs Sampler in Simulating Multiservice Loss Systems, in Performance of Information and Communications Systems '98 (arranged by IFIP TC6 WG6.3), 1998, Lund, Sweden (bib)(abstract)
  8. J. Virtamo and S. Aalto, Calculation of time-dependent blocking probabilities, in the Proceedings of the ITC Sponsored St. Petersburg Regional International Teletraffic Seminar Teletraffic Theory as a Base for QoS: Monitoring, Evaluation, Decisions, pp. 365-375, 1998, St. Petersburg (pdf)(bib)(abstract)
  9. S. Aalto, Optimal control of finite capacity batch service queues with general holding costs, in the 16th European Conference on Operational Research (EURO XVI), 1998, Brussels, Belgium (bib)(abstract)
  10. P. Lassila and J. Virtamo, Efficient Monte Carlo Simulation of Product Form Systems, in Fourteenth Nordic Teletraffic Seminar, NTS-14, pp. 355-366, 1998, Copenhagen, Denmark (pdf)(bib)(abstract)
  11. E. Hyytiä and J. Virtamo, Wavelength Assignment and Routing in WDM Networks, in Fourteenth Nordic Teletraffic Seminar, NTS-14, pp. 31-40, 1998, Copenhagen, Denmark (pdf)(bib)(abstract)
  12. K. Kyläkoski and J. Virtamo, Cache Replacement Algorithms for the Renewal Arrival Model, in Fourteenth Nordic Teletraffic Seminar, NTS-14, pp. 139-148, 1998, Copenhagen, Denmark (pdf)(bib)(abstract)
  13. S. Aalto and S. Giordano, Virtual trunk simulation, in ATM Traffic Symposium arranged by ACTS project EXPERT (AC094), 1997, Mykonos, Greece (bib)(abstract)

Technical Documents

  1. E. Hyytiä and J. Virtamo, Dynamic Routing and Wavelength Assignment Using First Policy Iteration, COST257, TD(00), 2000 (pdf)(bib)(abstract)
  2. P. Lassila and J. Virtamo, Nearly Optimal Importance Sampling for Monte Carlo Simulation of Loss Systems, COST257, TD(00), 2000 (pdf)(bib)(abstract)
  3. S. Aalto and J. Virtamo, Practical algorithm for calculating blocking probabilities in multicast networks, COST257, TD(00)29, 2000 (pdf)(bib)(abstract)
  4. E. Hyytiä and J. Virtamo, Wavelength assignment in multifiber networks, COST257, TD(99)04, 1999 (pdf)(bib)
  5. A. Vidacs and J. Virtamo, ML Estimation of the Parameters of FBM with Geometrical Sampling, COST257, TD(99)14, 1999 (pdf)(bib)
  6. E. Nyberg, J. Virtamo and S. Aalto, An exact algorithm for calculating blocking probabilities in multicast networks, COST257, TD(99)26, 1999 (pdf)(bib)(abstract)
  7. P. Lassila and J. Virtamo, Using Gibbs Sampler in Simulating Multiservice Loss Networks, COST257, TD(98)19, 1998 (pdf)(bib)(abstract)
  8. P. Lassila and J. Virtamo, Importance Sampling for Monte Carlo Simulation of Loss Systems, COST257, TD(98)49, 1998 (pdf)(bib)(abstract)
  9. J. Virtamo and S. Aalto, Blocking probabilities in a transient system, COST257, TD(97)14, 1997 (pdf)(bib)(abstract)
  10. J. Virtamo and S. Aalto, Remarks on the effectiveness of dynamic VP bandwidth management, COST257, TD(97)15, 1997 (pdf)(bib)(abstract)
  11. P. Lassila, J. Virtamo and S. Aalto, Two approaches to simulating loss networks, COST257, TD(97)30, 1997 (pdf)(bib)(abstract)
  12. P. Lassila and J. Virtamo, Regenerative Simulation Analysis for Loss Systems: Single Link and Single Traffic Type Case, COST257, TD(97)43, 1997 (pdf)(bib)(abstract)
  13. J. Karvo, J. Virtamo, S. Aalto and O. Martikainen, Blocking of dynamic multicast connections in a single link, COST257, TD(97)46, 1997 (pdf)(bib)(abstract)

Theses

  1. E. Hyytiä, Dynamic Control of All-Optical WDM Networks, Licentiate thesis, Helsinki University of Technology, Networking Laboratory, 2001 (pdf)(bib)(abstract)
  2. P. Lassila, Efficient simulation techniques for multiservice loss systems, Licentiate thesis, Helsinki University of Technology, Networking Laboratory, 1999 (pdf)(bib)(abstract)
  3. E. Nyberg, Calculation of Blocking Probabilities and Dimensioning of Multicast Networks, Master's Thesis, Networking Laboratory, Helsinki University of Technology, 1999 (pdf)(bib)(abstract)
  4. E. Hyytiä, Optimaalinen reititys ja aallonpituuksien jako täysoptisessa WDM-järjestelmässä, diplomityö, Teknillinen korkeakoulu, 1998 (pdf)(bib)(abstract)
  5. K. Kyläkoski, Performance models for caching World Wide Web traffic, Master's Thesis, Laboratory of Telecommunications, Helsinki University of Technology, 1998 (bib)

Other Documents

  1. K. Kyläkoski, Simulation of Simple Integrated Media Access (SIMA) with a Model for the User Behavior (pdf)(bib)(abstract)
  2. E. Siren, Simulation Studies of the Basic Packet Routing Problem, special assignment, Networking Laboratory, 2001 (pdf)(bib)(abstract)
  3. J. Renko, MPLS - Multi Protocol Label Switching: A technology report, Report, Networking Laboratory, Helsinki University of Technology, no. 1, 2000 (bib)
  4. R. Susitaival, Optisen pakettimultiplekserin suorituskykyanalyysi, special assignment (in Finnish), Networking Laboratory, 2000 (pdf)(bib)(abstract)

Software Tools and Demos

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