Study Of DWDM Technology In Henan Broadcasting Television Ring Network

In recent years, the rapid development of new various communication businesses has brought opportunities and challenges.In the face of the contradiction between the rapid growth of the businesses and the Incapability of meeting the needs, Henan broadcasting television network is badly in need of solving in the bottleneck of ring network bandwidth. Recently, the popular and wide application of DWDM technology makes it possible for the using of existing optical fiber transmission system to achieve greater capacity of transmission. By DWDM technology, multiplex signal can be transmitted simultaneously in a single optical fiber, so that the communication capacity can be increased in multiple geometric and the construction cost and operation cost can be reduced. Focusing on the eager-to-solve bottleneck of the ring network in Henan province, this article make a introduction to the purpose and importance of the research, a discussion to the factors which have effects on DWDM system, a study to the design of the DWDM transmission network and a explanation to maximum distance relaying calculation method, transmission network management, network protection, network performance. According to the existed Henan broadcasting ring network cable system resources, this article discusses the concrete designed plan and how to put it into practice, which include optical fiber type, the number of wavelengths, transmitting rate, light settings, dispersion compensation module placement and optical signal to noise ratio calculation, as well as try to establish a efficient communication network transmission with large capacity, high speed, and good quality. The DWDM technology we discussed in the article can be successfully apply to the Radio and television ring network in Henan Province and provides practical experience for expansion effects of DWDM technology to the existing system of cable network...