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Wave-shaping in multiprocessor bidirectional heuristic state space search

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EPIA 91 (EPIA 1991)

Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 541))

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Abstract

Parallel bidirectional heuristic island search combines forward chaining, backward chaining, and parallelism to search a state space. The only algorithm in this category to date (PBA*) has been demonstrated to exhibit excellent performance in practice (superlinear speedup in all tested cases) [Nels90d]. This paper introduces the concept of wave-shaping for parallel bidirectional heuristic island search. The resulting algorithm improves the performance of PBA* by dynamically redirecting the local search processes that run concurrently on PBA*, toward quick path establishment. Experimental results on a uniprocessor, as well as a multiprocessor machine (Intel iPSC/2 hypercube) demonstrate the viability of the proposed method.

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Author information

Authors and Affiliations

  1. Dept. of Electrical Engineering and Computer Science, University of Illinois, 60680, Chicago, Illinois, USA

    Peter C. Nelson

  2. Dept. of Computer Science and Mathematics, York University, Atkinson College, M3J 1P3, Toronto, Ontario, Canada

    Anestis A. Toptsis

Authors
  1. Peter C. Nelson
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  2. Anestis A. Toptsis
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Editor information

Pedro Barahona Luís Moniz Pereira António Porto

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© 1991 Springer-Verlag Berlin Heidelberg

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Nelson, P.C., Toptsis, A.A. (1991). Wave-shaping in multiprocessor bidirectional heuristic state space search. In: Barahona, P., Moniz Pereira, L., Porto, A. (eds) EPIA 91. EPIA 1991. Lecture Notes in Computer Science, vol 541. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-54535-2_27

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  • DOI: https://doi.org/10.1007/3-540-54535-2_27

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-54535-4

  • Online ISBN: 978-3-540-38459-5

  • eBook Packages: Springer Book Archive

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