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Algoritmos de Seleção de Caminho e Gerenciamento de Banda Compartilhada conforme ao Modelo RDM para Classes de Tráfego em Rede DS-TE

Walter da C. Pinto NetoJoberto S. B. MartinsSérgio de F. Brito

MPLS-TE (Multiprotocol Label Switching -Traffic Engineering) and DiffServ are technical alternatives used to support Traffic Engineering and QoS-demanding applications, running on multimedia multiservice networks. This paper proposes the MinPreptDSTE and the ADAPT-RDM algorithms, suitable to allocate LSPs in DiffServ-aware MPLS Traffic Engineering (DS-TE) networks, which use the RDM (Russian Dolls Model) bandwidth constraint model. The operation of the proposed algorithms is integrated. The MinPreptDSTE tries to minimize the number of preemptions on the network by selecting paths considering classes types (CTs) configuration and the RDM model itself. The ADAPT-RDM algorithm preserves hierarchical CTs priorities and efficient resource utilization in the RDM model, by implementing bandwidth sharing among different CTs. The paper describes the proposed algorithms and evaluates their results considering different implementation scenarios.

http://www.lbd.dcc.ufmg.br:8080/colecoes/sbrc/2008/038.pdf

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