Abstract

As widespread deployment of high-capacity dense wavelength-division multiplexing (DWDM) systems is envisioned, achieving efficient shared-path protection, which protects a bandwidth guaranteed connection from a single link (node) failure using a link (node) disjoint pair of active path (AP) and backup path (BP), becomes a key design consideration. Since the restoration time (the BP setup signaling delay) mainly depends on the BP length, long BPs will not only violate a given restoration time guarantee, but also introduce negative effects on the optical signal transmission quality (in terms of SNR, BER, etc).

© 2002 Optical Society of America