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A Simplified QoS Model for MPLS Networks  

Seo Seung-Joon (경남대학교 컴퓨터공학과 차세대인터넷 연구실)
Kang Chul-Hee (고려대학교 전자컴퓨터공학과 광대역통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.4B, 2005 , pp. 235-245 More about this Journal
Abstract
In this paper, a simplified QoS model of MPLS-based backbone network. Conventional scheme proposed by IETF(IETF schem) is to embed a DiffServ model in MPLS network. However, this approach results in overall upgrade of MPLS system and so it is difficult to deploy this approach. Our proposed model, however, uses a Vidual Link which is a set of Label Switched Path(LSP) connected from an Ingress Label Edge Router(LER) to an Egress LER. In this model, Per-Hop-Behavior(PHB) is implemented only at each LSP in ingress LER and Core Label Switch Routers(LSRs) just guarantee each LSP's bandwidth, not service. This bandwidth guarantee service is fully provided by legacy MPLS model. Also we propose flow allocation mechanism and the flow distribution among LSPs of the virtual link by the flow according to the network status. To evaluate the simplified approach, the characteristics of the approach are compared logically with these of IETF's one through simulations.
Keywords
MPLS; QoS; DiffServ; Virtual Link; PHB;
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