Wavelength layer recovery in transparent optical networks

Abstract

degradation can cause a loss of several hundreds of gigabytes of data per second. As repair of a fiber break may take several hours, network operators need to be able to restore the lost traffic demands by rerouting the affected traffic around the network failure. Consequently there is increasing motivation to utilize fast wavelength recovery capabilities and thereby minimize the wavelength service interruption time and congestion due to protection implemented in the higher layers.

Highly reliable wavelength‐reuse wavelength‐division multiplexing semipassive optical access network architecture with double cover area and high network capacity

“…In , researchers at Alcatel‐Lucent Bell Labs have acquired reservation processing time of 5 ms at wavelength layer. The recovery of communication in our scheme is also based on optical layer, and the fiber propagation time is 5 µs, which is small enough to be ignored. So the restored time can be less than 50 ms, which is demanded by telecommunication operators.…”