Strategies and technologies for planning a cost-effective survivable fiber network architecture using optical switches

A 1:1 diverse routing protection switching architecture using optical protection switches to reduce costs for providing 1:1 (i.e. 100%) protection against fiber cable cuts is proposed. A cost analysis model is used to evaluate cost/survivability merits for 1:1 optical diverse protection architectures. Results show that the best place to deploy the 1:1 photonic diverse protection architecture in future networks is in spans carrying large DS3 demands, which are usually interhub spans. The proposed architecture can be implemented using electronically controlled low-speed single-mode fiber mechanical optical switches as protection switches to meet current performance and availability requirements.>