NDLI: A constrained multipath traffic engineering scheme for MPLS networks

Content Provider	IEEE Xplore Digital Library
Author	Youngseok Lee Yongho Seok Yanghee Choi Changhoon Kim
Copyright Year	2002
Description	Author affiliation: Sch. of Comput. Sci. & Eng., Seoul Nat. Univ., South Korea (Youngseok Lee; Yongho Seok; Yanghee Choi)
Abstract	A traffic engineering problem consists of setting up paths between the edge nodes of the network to meet traffic demands while optimizing the network performance. It is known that total traffic throughput in a network, hence the resource utilization, can be maximized if the traffic demand is split over multiple paths. However, the problem formulation and practical algorithms, which calculate the paths and the traffic split ratio taking the route constraints or policies into consideration, have not been much touched. This paper proposes practical algorithms that find near optimal paths satisfying the given traffic demand under constraints such as maximum hop count, and preferred or not-preferred node/link list. The mixed integer programming formulation also calculates the traffic split ratio for the multiple paths. The problems are solved with the split ratio of continuous or discrete values. However, the split ratio solved with discrete values (0.1, 0.2 etc.) are more suitable for easy implementation at the network nodes. The proposed algorithms are applied to the multiprotocol label switching (MPLS) that permits explicit path setup. The paths and split ratio are calculated off-line, and passed to MPLS edge routers for explicit label-switched path (LSP) setup. The proposed schemes are tested in a large-scale fictitious backbone network. The experiment results show that the proposed algorithms are fast and superior to the conventional shortest path algorithm in terms of maximum link utilization, total traffic volume, and number of required LSPs.
Starting Page	2431
Ending Page	2436
File Size	245752
Page Count	6
File Format	PDF
ISBN	0780374002
DOI	10.1109/ICC.2002.997280
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-04-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Telecommunication traffic Multiprotocol label switching Routing protocols IP networks Bandwidth Computer science Throughput Resource management Linear programming Testing
Content Type	Text
Resource Type	Article

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