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http://dx.doi.org/10.3745/KIPSTC.2003.10C.2.155

Analysis of the Bandwidth Consumed by Restoration Paths for Service Guarantee in the Protection Switching Scheme  

Lee, Hwang-Kyu (텔코웨어 응용프로토콜1팀)
Hong, Sug-Won (명지대학교 컴퓨터소프트웨어학과)
Publication Information
The KIPS Transactions:PartC / v.10C, no.2, 2003 , pp. 155-162 More about this Journal
Abstract
Fast restoration time and service guarantee are the important goals to achieve the network reliability. In the protection switching scheme, one way to guarantee service fro an application session if a network happens to fail is to establish the restoration path that amounts to the same bandwidth of the working path of the session at the same time. When we setup the restoration path, we can reduce the bandwidth consumption by the restoration path if the path can share the bandwidth required by the other paths. This paper explains the methods how to determine the shared bandwidth of the restoration path in the protection switching scheme, given the maximum bandwidth assigned to a link along the working path. We point out that such sharing algorithm can not reduce the bandwidth consumption by the restoration paths in some cases, which contradict the general conception. We explain why this can happen, and show the simulation results in real network topologies to prove our arguments. We explain the reason of the failure of the sharing effect by the simple sharing algorithm. Finally we propose the way of how we can overcome the failure of the sharing effect, using the complete sharing algorithm based on the link database and showing the results.
Keywords
Traffic Engineering; Restoration; Bandwidth sharing;
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