Methods for protection and restoration from large-scale failures in telecommunicaton infrastructure

近年来，通信需求的爆炸性增长引起了人们对电信基础设施和骨干网络可靠性问题的特别关注。通信网络中大规模故障问题的重要性怎么强调都不为过。这样的故障可能会使主干网络瘫痪，并完全扰乱全国基于网络的基本语音和数据服务。在当今世界，快速、经济高效地恢复通信服务是必不可少的。存在许多不同的网络恢复选项，包括使用共享或专用容量的本地(基于链路)恢复或端到端(基于路径)保护，提供不同的恢复时间和冗余成本。

The explosive growth of communication demands in recent years has attracted special attention to the issue of reliability of telecommunications infrastructure and backbone networks. The importance of large-scale failure problems in communication networks cannot be overstated. Such failures could paralyze the backbone networks and completely disrupt essential network-based voice and data services across the country. Fast and cost-efficient recovery of communication service is essential in today's world. A number of different options for network restoration exist, including local (link-based) restoration or end-to-end (path-based) protection, using shared or dedicated capacity, offering different restoration times and redundancy costs.