title: Multi-link faults localization and restoration based on fuzzy fault set for dynamic optical networks.
abstract: Based on a distributed method of bit-error-rate (BER) monitoring, a novel multi-link faults restoration algorithm is proposed for dynamic optical networks. The concept of fuzzy fault set (FFS) is first introduced for multi-link faults localization, which includes all possible optical equipment or fiber links with a membership describing the possibility of faults. Such a set is characterized by a membership function which assigns each object a grade of membership ranging from zero to one. OSPF protocol extension is designed for the BER information flooding in the network. The BER information can be correlated to link faults through FFS. Based on the BER information and FFS, multi-link faults localization mechanism and restoration algorithm are implemented and experimentally demonstrated on a GMPLS enabled optical network testbed with 40 wavelengths in each fiber link. Experimental results show that the novel localization mechanism has better performance compared with the extended limited perimeter vector matching (LVM) protocol and the restoration algorithm can improve the restoration success rate under multi-link faults scenario.
authors: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China. yonglizhao@bupt.edu.cn
authors: Yongli
authors: Y
authors: Zhao
authors: Xin
authors: X
authors: Li
authors: Huadong
authors: H
authors: Li
authors: Xinbo
authors: X
authors: Wang
authors: Jie
authors: J
authors: Zhang
authors: Shanguo
authors: S
authors: Huang
mesh_terms: D000465:Algorithms; D003195:Computer Communication Networks / Q000295:instrumentation*; D019544:Equipment Failure Analysis / Q000295:instrumentation*; D017143:Fuzzy Logic; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*