The Multiple Path Protection of DWDM Backbone Optical Networks

• Main Authors: Fu-Hung shih, 施富宏
• Other Authors: Wen-Shyang Hwang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/20972911618994192324

碩士 === 國立高雄應用科技大學 === 電機工程系博碩士班 === 96 === The primary optical transmission protection technology is still based on the characteristics of SONET/SDH protection mechanisms to date. It belongs to a transmission structure of two fiber path ring. The architecture exists in a serious problem when two fibers are simultaneously broken. Therefore we exert to transfer the principles of SONET/SDH protection mechanisms onto the DWDM technology. This paper proposes and experimentally demonstrates an APS (Automatic Protection Switching) mechanism against distribution fiber breaks in DWDM optical networks. The protection scheme provides protection switching within 50 ms switch over time. The DWDM protection likes O-BLSR (MS-SPRING) or O-UPSR (SNCP) in SONET/SDH protection mechanisms. Nevertheless it is just two path fiber routing transmission. Therefore, in order to simplify the design of the DWDM optical layer and reduce the cost of protection network. We adopt the advantage of OPS (Optical Protection Switching) back-to-back connection protection mechanisms to accomplished the multiple path (4 or 8 fiber path) of DWDM backbone protection mechanisms,and used splitter with OPS stack mode to accomplished the mesh multiple path (greater than 8 fiber path) of DWDM backbone protection mechanisms. To accomplish protect the important traffic and channel of DWDM Backbone optical networks. Once the working fiber get into a fiber cut off, the traffic can be switched to the protection channel automatically for ensure the path connection.