Title
Computing A Diameter-Constrained Minimum Spanning Tree In Parallel
Abstract
A minimum spanning tree (MST) with a small diameter is required in numerous practical situations. It is needed, for example, in distributed mutual exclusion algorithms in order to minimize the number of messages communicated among processors per critical section. The Diameter- Constrained MST (DCMST) problem can be stated as follows: given an undirected, edge-weighted graph G with n nodes and a positive integer k, find a spanning tree with the smallest weight among all spanning trees of G which contain no path with more than k edges. This problem is known to be NP- complete, for all values of k; 4 ≤ k ≤ (n − 2). Therefore, one has to depend on heuristics and live with approximate solutions. In this paper, we explore two heuristics for the DCMST problem: First, we present a one-time-tree- construction algorithm that constructs a DCMST in a modified greedy fashion, employing a heuristic for selecting edges to be added to the tree at each stage of the tree construction. This algorithm is fast and easily parallelizable. It is particularly suited when the specified values for k are small—independent of n. The second algorithm starts with an unconstrained MST and iteratively refines it by replacing edges, one by one, in long paths until there is no path left with more than k edges. This heuristic was found to be better suited for larger values of k. We discuss convergence, relative merits, and parallel implementation of these heuristics on the MasPar MP-1 — a massively parallel SIMD machine with 8192 processors. Our extensive empirical study shows that the two heuristics produce good solutions for a wide variety of inputs.
Publication Date
1-1-2000
Publication Title
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume
1767
Number of Pages
17-31
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1007/3-540-46521-9_2
Copyright Status
Unknown
Socpus ID
84912115381 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84912115381
STARS Citation
Deo, Narsingh and Abdalla, Ayman, "Computing A Diameter-Constrained Minimum Spanning Tree In Parallel" (2000). Scopus Export 2000s. 947.
https://stars.library.ucf.edu/scopus2000/947