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Reliability threshold based service bandwidth recovery scheme for post-disaster telecom networks

机译：灾后电信网络中基于可靠性阈值的服务带宽恢复方案

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摘要

As natural disasters (e.g., earthquake, tsunami, hurricane, etc.) frequently threaten and damage the widely-deployed telecom infrastructure, maintaining the connectivity, transmission bandwidth, and reliability of various service connections becomes a crucial concern in post-disaster telecom networks (such as optical backbone networks). Based on a probabilistic failure model, in this paper we proposed a reliability threshold based service bandwidth recovery (RBR) scheme for recovering the bandwidth and reliability of the impacted service connections after a disaster. Here, the impacted service connections include the ones completely disrupted and/or the ones undisrupted but their reliability decreased beyond the corresponding reference thresholds. Since there is severe lack of bandwidth resource in the post-disaster network, some connections are difficult to obtain enough bandwidth. Under the resource crunch case, RBR employs relaxation policies based on reliability thresholds to explore reliable routes for the impacted connections and to optimize their bandwidth resource utilization. Simulation results show that RBR scheme can make a good trade-off between the bandwidth resource utilization and service connection reliability. It can also achieve satisfactory performance in terms of connection loss ratio, traffic loss ratio, and average connection reliability.
机译：由于自然灾害（例如地震，海啸，飓风等）经常威胁并破坏广泛部署的电信基础设施，因此，保持连接性，传输带宽和各种服务连接的可靠性已成为灾难后电信网络中的关键问题（例如光骨干网）。基于概率故障模型，本文提出了一种基于可靠性阈值的服务带宽恢复（RBR）方案，用于在灾难后恢复受影响的服务连接的带宽和可靠性。在此，受影响的服务连接包括完全中断的连接和/或未中断的连接，但是其可靠性降低到超出相应的参考阈值。由于灾后网络严重缺乏带宽资源，因此某些连接很难获得足够的带宽。在资源紧缺的情况下，RBR采用基于可靠性阈值的松弛策略来探索受影响连接的可靠路由并优化其带宽资源利用率。仿真结果表明，RBR方案可以在带宽资源利用率和服务连接可靠性之间做出很好的权衡。在连接丢失率，流量丢失率和平均连接可靠性方面，它也可以获得令人满意的性能。

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