Protection and restoration of ring in packet switched wavelength division multiplexed transport networks

In this paper, the dedicated protection of six node ring network has been demonstrated by taking normal fiber link and the protection fiber link. The restoration has been shown by switching of the traffic from the normal link to the protection link when an outage is occurred in the normal link. The normal link is again repaired and the traffic is switched back to the normal link. The network restoration time is measured as well as the signal transmission through nodes and the links is observed.