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Title A Preemption-Aware On-line Routing Algorithm for MPLS Networks
Edition Volume 24, Numbers 2-4
Call Number
ISBN/ISSN 1018-4864
Author(s) BLANCHY,FRANÇOIS
MÉLON,LAURENT
LEDUC,GUY LEDUC
Subject(s)
Classification
Series Title Telecommunication Systems
GMD Electronic Journal
Language English
Publisher Springer Netherlands
Publishing Year 2003
Publishing Place Netherlands
Collation 20p
Abstract/Notes In the context of Multiprotocol Label Switching (MPLS), we look at the problem of organizing
the mapping of Label Switched Paths (LSPs) in an optimal way throughout the network on the basis of a
given objective function. This problem is highly combinatorial and makes dynamic and real-time features a
difficult issue for any LSP routing scheme. For this reason, we propose a computationally efficient, though
approximate, on-line scheme adapted to an incremental optimization of the network state. We also propose
an integration of a computationally efficient preemption mechanism into this approximation. The efficiency
of this algorithm is obtained through a very rigid but seemingly appropriate policy concerning which LSPs
are appropriate for preemption. A feedback from preemption on the routing process is proposed, in order to
regulate the rate of the reroutings and to tune the balance between stability and continuous reorganization
in a network.
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