Resilience, survivability and availability in WDM optical mesh network

The network has become essential to all aspects of modern life and thus the consequences of network disruption have become increasingly severe. It is widely recognized that the generally network is not sufficiently resilient, survivable, highly available and dependable and that significant research, development and engineering is necessary to improve the situation. This paper describes the high level architecture of WDM optical mesh network for resilience, survivability and availability. This paper also describes about protection and restoration schemes available for optical network and further depicts how these protection and restoration schemes can be used to design highly resilient, highly survivable and highly available network (99.99999).