Developing scalable protocols for three-metric QoS routing

  • Authors:
  • Luís Henrique M. K. Costa;Serge Fdida;Otto Carlos M. B. Duarte

  • Affiliations:
  • -;LIP6, Université Pierre et Marie Curie, 4, place Jussieu, 75252 Paris Cedex 05, France;Grupo de Teleinformática e Automação--GTA, Universidade Federal do Rio de Janeiro--COPPE/EE, P.O. Box 68504 21945-970 Rio de Janeiro, RJ, Brazil

  • Venue:
  • Computer Networks: The International Journal of Computer and Telecommunications Networking
  • Year:
  • 2002

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Abstract

Quality of service (QoS) based routing provides QoS guarantees to multimedia applications and an efficient utilization of the network resources. Nevertheless, the QoS-routing algorithm must be simple because a costly procedure does not scale with the size of the network. This paper proposes and analyzes the performance of the single mixed metric (SMM) routing protocol in two versions: one based on distance-vectors and the other on link-states. SMM takes into account three metrics: propagation delay, available bandwidth, and loss probability. A heuristic based on the residual loss probability and metric-combination is used to turn the algorithm scalable and solvable in polynomial time. The simulation results show that SMM outperforms other solutions that implement QoS routing based on three metrics.