Research And Implication Of Long Distance Optical Line Protection

The optical line protection system (OLP) is a long-distance optical transmission network production system, which has a very important practical value. This system is based on the optical switch of modern telecommunication millisecond level. As a new research field in the transmission of optical technology, the OLP system illustrates a good prospect of application, so it has commanded the high attention of both academic community and industrial community.Compared with general optical network, the connection between high speeds of optical network depends on long-distance trunk line optical cables. Because the security for the routes of long-distance trunk line optical cable is so bad that when the optical fiber cables were interdicted, some problems would be brought if only depends on the protection of rig net at SDH level, such as single protection mode, poor security and poor prescription for dealing with some failures in extreme condition. Therefore, it requires seriously research on the design and establish of the protection system of optical circuit. Firstly, the essay analyses the protection system of optical.This essay firstly analyses the OLP system, and clarifies the basic principle of protection and the realization for protection. And then the essay analyzes the issue existed on the design and realization. After analyzing the main issues on design and implementation of the system, this essay provides the direction of simple solution.Aiming at the above main issues on the design and implementation of system, combined with the objective of the protection system of optical circuit and common network application type, this essay further discusses the principle of system realization on its centerpiece: optical switch on millisecond level; technology means and analysis of experiments. The practical application design composition functional module and its effect realization; This essay desirables the practical application and evaluation after test in trunk group of network in China Mobile Communication Corp on optical transmission network production system as well.Finally, the essay provides the relative assume on the possible direction of the improvement according to the issues on system implementation in the future.