Protection Approaches for Dynamic Traffic in IP/MPLS-over-WDM Networks

Due to the explosive growth of data-related traffic driven by the Internet, network reliability becomes an important issue. The authors investigate various protection approaches to handle failures for dynamic traffic demands in IP/MPLS-over-WDM networks. An LSP can be protected at either the IP/MPLS layer or the optical layer. In IP/MPLS layer protection, an LSP is protected by providing a link-disjoint backup LSP between its end nodes. In optical layer protection, an LSP is protected by the backup lightpath of each lightpath traversed by the LSP.