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arXiv 1809.03589cs.ITcs.DMmath.IT
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无约束图约束成组测试

Unconstraining graph-constrained group testing

Bruce Spang, Mary Wootters

摘要:

在网络断层扫描中,一个目标是通过在网络中发送几个数据包并查看哪些数据包到达目的地来识别网络中的一小部分故障链路。这个问题可以被看作是组合群测试的一个变体,之前已经在绰号“图约束群测试”下进行了研究。这项工作的主要贡献是表明,对于大多数图,底层网络拓扑所施加的“约束”根本不是约束。也就是说,在“图约束”组测试中识别失败链接所需的测试数量是接近最优的,即使对于相应的组测试问题没有图约束。我们的方法是基于一个简单的随机结构的测试,分析我们的建设,我们证明了随机稀疏图的巨组件的大小的新结果。最后,我们提供的实证结果表明,我们的连通子图测试不仅在理论上,而且在实践中表现得更好,特别是在现实世界的网络拓扑结构上表现得更好。

英文摘要:

In network tomography, one goal is to identify a small set of failed links in a network, by sending a few packets through the network and seeing which reach their destination. This problem can be seen as a variant of combinatorial group testing, which has been studied before under the moniker "graph-constrained group testing." The main contribution of this work is to show that for most graphs, the "constraints" imposed by the underlying network topology are no constraint at all. That is, the number of tests required to identify the failed links in "graph-constrained" group testing is near-optimal even for the corresponding group testing problem with no graph constraints. Our approach is based on a simple randomized construction of tests, to analyze our construction, we prove new results about the size of giant components in randomly sparsified graphs. Finally, we provide empirical results which suggest that our connected-subgraph tests perform better not just in theory but also in practice, and in particular perform better on a real-world network topology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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