Time Lower Bounds for Distributed Distance Oracles
Time Lower Bounds for Distributed Distance Oracles
复制标题
分布式距离预言机的时间下限
DOI:
--
复制
发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Roger Wattenhofer
中科院分区:
文献类型:
--
作者:
Taisuke Izumi;Roger Wattenhofer
Distributed distance oracles consist of a labeling scheme which assigns a label to each node and a local data structure deployed to each node. When a node v wants to know the distance to a node u, it queries its local data structure with the label of u. The data structure returns an estimated distance to u, which must be larger than the actual distance but can be overestimated. The accuracy of the distance oracle is measured by stretch, which is defined as the maximum ratio between actual distances and estimated distances over all pairs (u, v).