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Global QoS model in the ISP networks: DiffServ aware MPLS Traffic Engineering

Abstract : Traffic Engineering is the one of the methods for improving the Quality of Service in the network like Internet. Multipath routing is a mechanism for load balancing in which the total load is spatially distributed over several paths. It can reduce congestion probability given by routing into best one path in the current Internet. We focus on MPLS network, which is usable in the ISP network. LSPs of MPLS provide path controllability by explicit route in the connectionless IP network.
Multipath routing scheme is established with two steps, selection of multiple candidate paths and traffic splitting among these selected paths. We compare some recent multipath routing algorithms based on MPLS in the point of scalability and stability. Of them, we pick up WDP and LDM for our hybrid approach which combines cross-steps of different algorithms. PER algorithm is proposed in the improvement of LDM's traffic splitting step. Using LDM, WDP and PER, three hybrid QoS algorithms by each step combination are made. Their performances are proved by simulation that they, especially LBWDP (Load Balancing over Widest Disjoint Paths), are more effective than LDM or MATE.
For better QoS guarantee, we integrate DiffServ with our traffic engineering technique (DiffServ-aware MPLS Traffic Engineering: DS-TE). PEMS (PEriodic Multi-Step algorithm in DS-TE network) is proposed as one DS-TE model to differentiate the quality of service according to the class. For PEMS algorithm, we propose new algorithm to select candidate paths by proper metric of each traffic class. PER algorithm distributes the traffic among its own candidate paths by dynamic metric of requested class. Simulation results using ns-2 showed that PEMS can balance the load less than LBWDP but EF and AF classes can be ensured the better quality of service than LBWDP.
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Contributor : Kyeongja Lee <>
Submitted on : Tuesday, November 7, 2006 - 1:52:36 PM
Last modification on : Tuesday, November 24, 2020 - 2:18:22 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 9:43:58 PM


  • HAL Id : tel-00112088, version 1



Kyeongja Lee. Global QoS model in the ISP networks: DiffServ aware MPLS Traffic Engineering. domain_other. Ecole Centrale de Lille, 2006. English. ⟨tel-00112088⟩



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