Survivable WDM mesh networks. Part I-Protection
Survivable WDM mesh networks. Part I-Protection
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DOI：
10.1109/infcom.1999.751461
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发表时间：
1999-03
期刊：
影响因子：
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通讯作者：
S. Ramamurthy;B. Mukherjee
中科院分区：
文献类型：
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作者：
S. Ramamurthy;B. Mukherjee
本研究考虑采用波长交叉连接的光网络，这种连接可以在节点对之间建立波分复用（WDM）通道。在这样的网络和其他网络中，一个网元（如光纤链路、交叉连接等）的故障可能导致多个光通道的故障，从而导致大量数据丢失。本研究探讨了保护基于网状的WDM光网络免受单链路故障的不同方法。这些方法基于两种基本的生存能力范式：(a)路径保护/恢复，(b)链路保护/恢复。在路径和链路保护方案中，备份路径和波长在呼叫建立时预先保留。路径恢复和链路恢复是一种动态恢复方案，在故障发生时（从网络的空闲容量中）自动发现备份路径。在本文的第一部分中，我们制定了整数线性规划来确定静态交通需求下上述保护方案的容量需求。
This investigation considers optical networks which employ wavelength cross-connects that enable the establishment of wavelength-division-multiplexed (WDM) channels, between node-pairs. In such and other networks, the failure of a network element (e.g., fiber link, cross-connect, etc.) may cause the failure of several optical channels, thereby leading to large data losses. This study examines different approaches to protect mesh based WDM optical networks from single-link failures. These approaches are based on two basic survivability paradigms: (a) path protection/restoration, and (b) link protection/restoration. In path- and link-protection schemes, backup paths and wavelengths are reserved in advance at the time of call setup. Path- and link-restoration schemes are dynamic schemes in which backup paths are discovered (from the spare capacity in the network) upon the occurrence of a failure. In part 1 of this study presented in this paper, we formulated integer linear programs to determine the capacity requirements for the above protection schemes for a static traffic demand.