Distributed Spanner Construction in Doubling Metric Spaces
Distributed Spanner Construction in Doubling Metric Spaces
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加倍度量空间中的分布式 Spanner 构造
DOI:
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发表时间:
2006
期刊:
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通讯作者:
Sriram V. Pemmaraju
中科院分区:
文献类型:
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作者:
Mirela Damian;Saurav Pandit;Sriram V. Pemmaraju
This paper presents a distributed algorithm that runs on an n-node unit ball graph (UBG) G residing in a metric space of constant doubling dimension, and constructs, for any e 0, a (1 + e)-spanner H of G with maximum degree bounded above by a constant. In addition, we show that H is “lightweight”, in the following sense. Let Δ denote the aspect ratio of G, that is, the ratio of the length of a longest edge in G to the length of a shortest edge in G. The total weight of H is bounded above by O(logΔ) · wt(MST), where MST denotes a minimum spanning tree of the metric space. Finally, we show that H satisfies the so called leapfrog property, an immediate implication being that, for the special case of Euclidean metric spaces with fixed dimension, the weight of H is bounded above by O(wt(MST)). Thus, the current result subsumes the results of the authors in PODC 2006 that apply to Euclidean metric spaces, and extends these results to metric spaces with constant doubling dimension.