When planning electric power communication wavelength-division multiplexing (WDM) networks

the issue of survivability design has to be considered. To employ protection schemes

traditional approaches rely on peak rates between node pairs irrespective of the condition that fiber links may share physical resources with one another. This yields gross resource redundancy as well as little accuracy in network planning. This paper proposes a novel probability model to compute shared risk link groups (SRLG) failures and a differentiated protection algorithm HSP on the basis of the hose uncertain traffic model and SRLG

so as to reach a solution of the above issues. Computer simulation is conducted to evaluate the performance of HSP. The results show that HSP dramatically increases the possibility of finding protection paths

thus making the interrupted services more likely to recover. Both the probability model and the algorithm are applied in the performance evaluation and rolling planning of a provincial level electric power WDM core network

as evidence of making the evaluation of the network cost and reliability.