Adapt-RDM - A bandwidth management algorithm suitable for DiffServ services aware traffic engineering

MPLS-TE and DiffServ are technical alternatives used for supporting traffic engineering and QoS-demanding applications, such those typically found in multimedia multiservice networks. This paper proposes an algorithm based on LSP rate reduction and LSP preemption, the ADAPT-RDM algorithm, suitable to manage bandwidth sharing according with the RDM (Russian doll model) model. The constraints used by the ADAPT-RDM algorithm are fundamentally the class priority preservation and the RDM model´s basic constraints (bandwidth sharing by classes). The proposed algorithm is suitable for use in DS-TE context. The paper describes the proposed algorithm and evaluates its results considering different implementation scenarios.