摘要
传输网作为各种业务网和业务的传送载体，是整个电信运营网络的基础。本文主要分析和讨论了本地同步数字体系（SDH）传输网络的现状，对分层式网络结构、环网络结构、设备配置中再生段的计算和网络同步问题，及其应用条件作了较为详尽的描述，并从实用的角度出发以XX市本地传输网为例介绍了如何对SDH网络进行规划和分析，并且对本地SDH传输网络的发展和规划作了深入浅出的论述，强调了传输网络规划在通信网建设中的重要性[1]。 论文介绍了XX市传输网的现状，并提出了网络规划的具体步骤。首先提出传输网规划建设的总体指导原则，在此基础上提出构建传输网的三个基本网络（管道网、光缆网和设备网）；其次在遵循上述原则的基础上，结合XX市的具体情况，给出该市传输网络规划的详细方法和过程，在规划方案中明确了关于传输汇聚点和汇聚层的关键作用；根据实际业务需求以及面向3G网业务的需要，明确了基于SDH的MSTP技术解决方式；最后，通过分析得出XX市传输网发展仍应采用基于SDH的MSTP技术，并且在ASON技术成熟后可以在核心骨干层采用MSTP OVER ASON或WDM OVER ASON，而在汇聚接入层仍以MSTP为主的结论。
关键词 ：同步数字体系;网络规划;自愈环;STM-N;MSTP.
ABSTRACT
Transmission Network is the foundation of the whole Telecom Operation Netwok,as a transmission vector of Business Network and business. This paper anlyses and dicusses the status quo of local SDH Transmission Network, made a detailed description of the Hierarchical Network structure, Ring Network architecture, the computing problem of device configuration renewable paragraph , network synchronization and application conditions, at the same time, from a practical point of view to the local Transmission Network in XX City as an example to introduce how to SDH Network planning and analysis, and local SDH Transmission Network development and planning were discussed in simple terms, stressed the importance of Transmission Network planning in Communication Networks construction .
The paper dicussed the status quo of Transmission Network in XX city , and proposed concrete steps to network planning. First of all, proposed the overall guiding principles of the planning and construction of Transmission Network, in this based proposed methods of network planning and design and planning principles of three basic networks for the building Transmission Network ( Pipeline Networks, Cable Networks and Equipment Networks)；the second, on the basis of the above-mentioned principles in combination with the specific circumstances of the city XX city, given the city a detailed planning methods and process in Transmission Network, in planning program cleared on the key role of aggregation point and the transmission convergence layerthe transmission; in accordance with the actual business needs, as well as business-oriented needs of 3G networks, cleared the solutions of the SDH-based MSTP technology; Finally, analysis of the development of XX city Transmission Network should be based on SDH technology of MSTP, and can be used in the core backbone layer MSTP OVER ASON or WDM OVER ASON when ASON technology is mature, and converged access layer is still the main conclusions of MSTP.
Keywords: SDH planning networks, Self-Healing Ring, STM-N, Multi-Service Transport Platform
