Evaluating dual-failure restorability in mesh-restorable WDM optical networks

被引：10

作者：

Frederick, MT ^{[1
]}

Datta, P ^{[1
]}

Somani, AK ^{[1
]}

机构：

[1] Iowa State Univ, Dept Elect & Comp Engn, Dependable Comp & Networking Lab, Ames, IA 50011 USA

来源：

ICCCN 2004: 13TH INTERNATIONAL CONFERENCE ON COMPUTER COMMUNICATIONS AND NETWORKS, PROCEEDINGS | 2004年

关键词：

optical networks; wavelength division multiplexing; protection; restoration; restorability; sub-graph routing;

D O I：

10.1109/ICCCN.2004.1401655

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Double link failure models, in which any two links in the network fail in an arbitrary order, are becoming critical in survivable optical network design. A significant finding is that designs offering complete dual-failure restorability require almost triple the amount of spare capacity. In this paper, networks are designed to achieve 100% restorability under single link failures, while maximizing coverage against any second link failure in the network. In the event of a single link failure, the restoration model attempts to dynamically find a second alternate link-disjoint end-to-end path to provide coverage against a sequential overlapping link failure. Sub-graph routing [1] is extended to provide dual-failure restorability for a network provisioned to tolerate all single-link failures. This strategy is compared with shared-mesh protection. The results indicate that sub-graph routing can achieve overlapping second link failure restorability for 95-99% of connections. It is also observed that sub-graph routing can inherently provide complete dual-failure coverage for similar to 72-81% of the connections.

引用

页码：309 / 314

页数：6

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