Shin-ichi Kuribayashi
1Department of Computer and Information Science, Seikei University, Japan
Abstract
Multi-Protocol Label Switching (MPLS) had been deployed by many data networking service providers including the next-generation mobile backhaul networks, because of its undeniable potential in terms of
virtual private network (VPN) management, traffic engineering, etc. In MPLS networks, IP packets are
transmitted along a Label Switched Path (LSP) established between edge nodes. To improve the
efficiency of resource use in MPLS networks, it is essential to utilize the LSPs efficiently.
This paper proposes a method of selecting the optimal LSP pair from among multiple LSP pairs
which are established between the same pair of edge nodes, on the assumption that both the upward and
downward LSPs are established as a pair (both-way operation). It is supposed that both upward and
downward bandwidths are allocated simultaneously in the selected LSP pair for each service request. It
is demonstrated by simulation evaluations that the proposal method could reduce the total amount of the
bandwidth required by up to 15% compared with the conventional selection method. The proposed
method can also reuse the know-how and management tools in many existing networks which are based
on both-way operation.
Keywords
MPLS network, LSP selection, both-way operation
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