NDLI: Optimization of resilient weight systems for shortest-path routing in IP networks

Content Provider	IEEE Xplore Digital Library
Author	Dzida, M. Zagozdzon, M. Pioro, M.
Copyright Year	2007
Description	Author affiliation: Inst. of Telecommun., Warsaw Univ. of Technol., Warsaw (Pioro, M.) \|\| R&D Center of Polish Telecom, Warsaw Univ. of Technol., Warsaw (Dzida, M.; Zagozdzon, M.)
Abstract	In the paper we address traffic engineering problems related to optimization of routing in IP networks applying destination-based shortest path routing (SPR) of the OSPF type. An SPR routing pattern is determined by a system of (administrative) weights defined over the set of IP links: the routes for IP forwarding are determined as the shortest paths computed locally at the nodes using the current link weights. When the shortest path from a certain node (node v, say) to a particular destination (destination t, say) is not unique, the traffic routed from node v to destination t is split equally among all links outgoing from v that belong to the shortest paths to destination t, i.e., according to the Equal Cost Multiple-Paths (ECMP) rule. The basic problem considered in this paper consists in finding a resilient link weight system generating a routing scheme that satisfies given traffic demands and does not lead to link overloads both in the normal network state of operation and in all considered failure states when certain IP links are failed. We assume that if a failure occurs then the weight system is modified by assigning infinite weights to the failed links, and not altering the weights of the remaining, operating links. We consider the traffic engineering goal related to minimization, over all failure states, of the maximal link overload. We formulate the considered problem as a mixed integer programme (MIP) and propose a heuristic algorithm based on the tabu search metaheuristic. The efficiency of the proposed weight optimization method is illustrated by means of a numerical study.
Starting Page	1
Ending Page	6
File Size	121453
Page Count	6
File Format	PDF
ISBN	9781424438242
DOI	10.1109/DRCN.2007.4762270
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-07
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	SEE
Subject Keyword	Multiprotocol label switching Costs Telecommunication traffic Quality of service Routing protocols Paper technology Internet IP networks Communication system traffic Research and development
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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