论文标题
容忍故障边缘路径 - 超出统一断层
Fault-Tolerant Edge-Disjoint Paths -- Beyond Uniform Faults
论文作者
论文摘要
绝大多数可生存的(容忍故障)网络设计模型都假设了断层模型。这样的模型假设给定基数$ K $的网络资源(边缘或顶点)的每个子集可能会失败。尽管这种方法会带来干净的组合结构和良好的算法问题,但通常无法捕获应用程序设置的真实性质。统一模型的一种自然改进是通过将资源集分为脆弱和安全的资源来获得的。该方案集包含最多$ k $错误资源的每个子集。这项工作研究了容忍故障路径(FTP)问题,这是该故障模型中最短路径问题的对应物和容忍故障流量问题(FTF),这是$ \ ell $ -dischint最短$ s $ s $ -s $ -t $ t $路径问题的对应物。我们将复杂性结果与两个模型的精确和近似算法一起。我们强调了问题相对于统一类似物(边缘偶口路径问题)的复杂性的巨大增加。
The overwhelming majority of survivable (fault-tolerant) network design models assume a uniform fault model. Such a model assumes that every subset of the network resources (edges or vertices) of a given cardinality $k$ may fail. While this approach yields problems with clean combinatorial structure and good algorithms, it often fails to capture the true nature of the scenario set coming from applications. One natural refinement of the uniform model is obtained by partitioning the set of resources into vulnerable and safe resources. The scenario set contains every subset of at most $k$ faulty resources. This work studies the Fault-Tolerant Path (FTP) problem, the counterpart of the Shortest Path problem in this fault model and the Fault-Tolerant Flow problem (FTF), the counterpart of the $\ell$-disjoint Shortest $s$-$t$ Path problem. We present complexity results alongside exact and approximation algorithms for both models. We emphasize the vast increase in the complexity of the problem with respect to the uniform analogue, the Edge-Disjoint Paths problem.