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Routing Symmetric Demands in Directed Minor-Free Graphs with Constant Congestion

Authors Timothy Carpenter, Ario Salmasi, Anastasios Sidiropoulos

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Author Details

Timothy Carpenter
  • Dept. of Computer Science & Engineering, The Ohio State University, Columbus, OH, USA
Ario Salmasi
  • Dept. of Computer Science & Engineering, The Ohio State University, Columbus, OH, USA
Anastasios Sidiropoulos
  • Dept. of Computer Science, University of Illinois at Chicago, USA

Funding

This work was supported by NSF under CAREER award 1453472 and grant CCF 1815145.

Cite AsGet BibTex

Timothy Carpenter, Ario Salmasi, and Anastasios Sidiropoulos. Routing Symmetric Demands in Directed Minor-Free Graphs with Constant Congestion. In Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques (APPROX/RANDOM 2019). Leibniz International Proceedings in Informatics (LIPIcs), Volume 145, pp. 14:1-14:15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)
https://doi.org/10.4230/LIPIcs.APPROX-RANDOM.2019.14

Abstract

The problem of routing in graphs using node-disjoint paths has received a lot of attention and a polylogarithmic approximation algorithm with constant congestion is known for undirected graphs [Chuzhoy and Li 2016] and [Chekuri and Ene 2013]. However, the problem is hard to approximate within polynomial factors on directed graphs, for any constant congestion [Chuzhoy, Kim and Li 2016]. Recently, [Chekuri, Ene and Pilipczuk 2016] have obtained a polylogarithmic approximation with constant congestion on directed planar graphs, for the special case of symmetric demands. We extend their result by obtaining a polylogarithmic approximation with constant congestion on arbitrary directed minor-free graphs, for the case of symmetric demands.

Subject Classification

ACM Subject Classification
  • Mathematics of computing → Graph algorithms
Keywords
  • Routing
  • Node-disjoint
  • Symmetric demands
  • Minor-free graphs

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References

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