"High-Availability Network Design, Optimization, and Analysis"

《高可用性网络设计、优化和分析》

• 批准号: 327656-2012
• 负责人: Doucette, John
• 金额: $ 1.31万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=572090
• 关键词: Availability; Network; Design; Optimization; Analysis

Despite considerable efforts taken to provide physical protection of cables, North American networks still experience frequent cable cuts and outages. For more traditional networks of the type used for basic voice or data, outages can result in severe financial losses. Given the critical nature of many of the applications that emerging networks are intended to carry (medical-grade applications, first responder applications, etc.), the consequences of failure could be much more extreme. And yet the very sparse nature of many public (and even some private) networks' underlying infrastructure makes them inherently un-survivable, often with single points of failure. In those cases, span cuts could easily result in one portion of the network being severed from the remainder. The proposed work will investigate the design and performance analysis of networks in mission critical settings. This requires modeling and analysis of the current use, as well as the projected future use, of such networks, taking into consideration how the usage patterns of those networks will shift over time. While work has been done to provide enhanced survivability of critical applications, there are many opportunities to develop more advanced techniques to further enhance survivability and intrinsic availability. The growing prevalence of critical applications routed over modern networks will significantly alter the way in which they will need to evolve when compared to traditional "best effort" IP-based networks. The research will focus on four key topics: (1) Traffic Characterization of Critical Applications and Associated Availability Analysis (2) Improved Availability Through Enhanced Multi-Failure Protection (3) Improved Availability through Network Topology Augmentation (4) Heuristic and Advanced ILP Optimization Techniques

尽管采取了相当大的努力来提供电缆的物理保护，但北美网络仍然频繁地切断和中断电缆。对于用于基本语音或数据的更传统的网络，中断可能会导致严重的经济损失。鉴于新兴网络要承载的许多应用程序的关键性质(医疗级应用程序、急救应用程序等)，故障的后果可能要极端得多。然而，许多公共网络(甚至一些私人网络)的底层基础设施非常稀疏，这使得它们天生就无法生存，往往出现单点故障。在这种情况下，跨距削减很容易导致网络的一部分与其余部分断开。 这项拟议的工作将调查关键任务环境下网络的设计和性能分析。这需要对此类网络的当前使用情况以及预测的未来使用情况进行建模和分析，同时考虑到这些网络的使用模式将如何随着时间的推移而变化。虽然已经做了一些工作来提高关键应用程序的生存能力，但仍有许多机会开发更先进的技术，以进一步提高生存能力和内在可用性。与传统的“尽力而为”的基于IP的网络相比，通过现代网络路由的关键应用程序越来越普遍，这将显著改变它们需要发展的方式。 这项研究将围绕四个关键主题展开： (1)关键应用的流量特征和相关可用性分析 (2)通过增强的多故障保护提高可用性 (3)通过网络拓扑增强提高可用性 (4)启发式和高级ILP优化技术