New algorithms for QoS performance improvement in high speed networks

  • Authors:
  • Radu Dobrescu;Daniela Hossu;Stefan Mocanu;Maximilian Nicolae

  • Affiliations:
  • "Politehnica" University of Bucharest, Faculty of Control and Computers, Bucharest, Romania;"Politehnica" University of Bucharest, Faculty of Control and Computers, Bucharest, Romania;"Politehnica" University of Bucharest, Faculty of Control and Computers, Bucharest, Romania;"Politehnica" University of Bucharest, Faculty of Control and Computers, Bucharest, Romania

  • Venue:
  • WSEAS TRANSACTIONS on COMMUNICATIONS
  • Year:
  • 2008

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Abstract

In this paper is addressed the issue how to provide QoS control and improve performance in high speed Optical Burst Switching (OBS) networks. In order to provide better proportional differentiated services are proposed new algorithms: a burst assembly algorithm (named adaptive timer-based) with traffic shaping functions and a Delayed Burst Assignment (DBA) scheme, both able to reduce the variance of assembled traffic and to improve the burst loss performance. A precise analytical model to study the performance of the assembled traffic in high speed networks is also presented. The simulation results show that the proposed algorithms have better performance in terms of edge buffering delay and can lighten burst loss ratio for TCP flows of the OBS network.