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An A* Algorithm with a New Heuristic Distance Function for the 2-Terminal Shortest Path Problem
Kazuaki YAMAGUCHI Sumio MASUDA
Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Vol.E89-A
No.2
pp.544-550 Publication Date: 2006/02/01 Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e89-a.2.544 Print ISSN: 0916-8508 Type of Manuscript: PAPER Category: Algorithms and Data Structures Keyword: shortest path, preprocessing, A* algorithm, routing,
Full Text: PDF>>
Summary:
The 2-terminal shortest path problem is to find a shortest path between two specified vertices in a given graph G. In this paper, we consider this problem in the following situation: G is given before the two vertices are specified so that some preprocessing is allowed to reduce the response time. We present a method for calculating lower bounds of the length of the shortest path for any pair of vertices. Experimental results show that the A* algorithm with our method performs much better than previous methods.
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