Design and control issues of integrated self-healing networks in SONET

An integrated self-healing network is discussed, where RD (route diversity), SSR (shared self-healing ring), and DSH (dynamic self-healing algorithms) together perform the whole network restoration. In order to achieve a higher degree of network survivability, a joint use of SSR and DSH techniques is one of the solutions. The authors specifically propose the shared use of protection routes between SSR and DSH, which can reduce the total amount of spare capacity. The proposed integrated self-healing can be applied to a practical SONET (synchronous optical network) environment in which a variety of network elements are placed. Various survivability requirements are given