Optimal Tree Topology for a Submarine Cable Network With Constrained Internodal Latency

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)2673-2683
Journal / PublicationJournal of Lightwave Technology
Issue number9
Online published4 Feb 2021
Publication statusPublished - 1 May 2021



This paper provides an optimized cable path planning solution for a tree-topology network in an irregular 2D manifold in a 3D Euclidean space, with an application to the planning of submarine cable networks. Our solution method is based on total cost minimization, where the individual cable costs are assumed to be linear to the length of the corresponding submarine cables subject to latency constraints between pairs of nodes. These latency constraints limit the cable length between any pair of nodes. Our method combines the Fast Marching Method (FMM) and a new Integer Linear Programming (ILP) formulation for Minimum Spanning Trees (MST) where there are constraints between pairs of nodes. For cable systems for which ILP is not able to find the optimal solution within an acceptable time, we propose two polynomial-time heuristic methods based on Prim's algorithm, which we call PRIM I and PRIM II. PRIM I starts with an arbitrary initial node, while PRIM II iterates PRIM I over all nodes. A comprehensive comparative study is presented that demonstrates that PRIM II achieves results for the total cable length that are on average only 2.98% in excess of those obtained by the ILP benchmark. In addition, we apply our method, named FMM/ILP-based, to real-world cable path planning examples and demonstrate that it can effectively find an MST with latency constraints between pairs of nodes.

Research Area(s)

  • cable path planning, Communication cables, Integer linear programming, latency constraints, minimum spanning tree, Path planning, Planning, Prim-based algorithm, Topology, Two dimensional displays, Underwater cables, Vegetation

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