Abstract
The problem of providing dependable connections in WDM networks is an important problem due to high traffic speed and high vulnerability of such networks. We call a connection with fault tolerant requirements as a dependable connection (D-connection). We consider single-link and multi-link failure models in our study. We consider a full redundancy-based schemes where the backup path for every accepted are identified at the and recommend to use a pro-active approach wherein a D-connection is identified with the establishment of the primary lightpath and a backup lightpath at the time of honoring the request (called restoration).
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