| GPON technology is a passive optical network technology in recent years, is widely used in various types of transformation of FTTX access networks in the future direction of development. GPON technology can provide downstream bandwidth of up to2.5Gbit/s rate can be adapted to the evolution of metro broadband network access layer transformation and convergence layer transmission bearer needs to meet the future needs of the development of broadband; GPON technology theoretically can provide up to1:128split ratio can be reduced to the trunk cable and supporting pole road, pipeline investment. GPON technology is also good the TMD ability to support can be used for the access layer transfer of TMD to carry, to protect the existing investment of CRC Zhejiang Branch. GPON technology as a passive optical network technology, fiber optic cable link from the central office to the client all passive components, can reduce the maintenance and use costs. GPON technology to access greater than20KM distance can reduce the number of access network point, simplifying the network structure of the MAN.The main content of this study is the the CTT Zhejiang branch of MAN GPON renovation project design and engineering practice. The paper First make a simple analysis and comparison of telecommunications metropolitan area network technology, introducing telecom metro transport, broadband,access network bearer, passive optical network technology characteristics, types, and comparison of three passive optical network technology, focusing on the GPON technology principle, characteristics, network mode. Then analyzed Zhejiang CTT metro transport, broadband access network status quo and from the transformation of the necessity, feasibility, and scope of the transformation needs to conduct in-depth analysis. Lower through the analysis and combination of Zhejiang CTT MAN development status, to determine CTT Zhejiang branch of MAN GPON renovation project the overall planning, implementation of the segment; improve the user experience; to maximize use of existing resources, reduce construction costs; MAN maintenance costs of the design principles. According to the above four design principles proposed the Zhejiang CTT MAN transformation of the physical topology and Zhejiang CTT metro transport, access, broadband network carrying way to transform the overall technology program. Based on the overall technical program the Zhejiang Railcom MAN transformation of the detailed design, combined with the Zhejiang CTT MAN at this stage transformation scene FTTC+DSLAM down detailed design, FTTH/FTTO broadband transformation specific detailed design of the program, Fibre Line Access transform the detailed design of programs of three typical detailed design and engineering practice, the specific analysis of the design and practice of a few typical cases in Zhejiang CTT MAN GPON transformation. Finally, Conduct Summary and Optimization to the the GPON transformation of Zhejiang CTT MAN, Put forward the deficiencies and Improvements Measure.Current Zhejiang CTT MAN GPON pilot project background, Combine the Zhejiang the CTT MAN status quo and GPON technology of their own characteristics, TO Zhejiang CTT MAN transmission, broadband access network bearer way transformation of the angles Expansion studies, by this studies GPON is a technology fit for Zhejiang CTT MAN transformation, able to meet the needs of Zhejiang CTT MAN transformation. According to different network coverage, the application of GPON technology on the existing MAN corresponding transformation can improve the quality of the metropolitan area network, to meet the needs of broadband users, to protect existing investments, and reduce maintenance costs for the Zhejiang CTT further business development to better adapt to the competition in the telecommunications market and the development of the Internet, implementation collaborative development strategy to the of mobile listed companies to lay a good foundation. |
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