【作者】 高峰；

【导师】 肖军； 伍立新；

【作者基本信息】 东北大学 ， 电子与通信工程（专业学位）， 2013， 硕士

【摘要】 1966年,英籍华裔学者高锟和霍克哈姆发表了关于传输介质新概念的论文,奠定了现代光通信的基础。经过40几年的发展,光通信继准同步数字体系(PDH)、同步数字体系(SDH)等数字传输体系后,近年来陆续出现了多业务传输平台(MSTP)和自动交换光网络(ASON)等新技术。从总体来看,光网络技术的发展趋势,体现在3个方面：在形态上,走向传输与交换的融合；在硬技术上,走向全光网；在软技术上,走向智能网。当今社会光电通信方式多元化,通信基础迅速发展。光接入网已经逐步替代普通模拟拥护环路。SDH技术已经相当成熟,其应用已经由长途网到中继网,最后在接入网上广泛遍及。作为以承载TDM业务而设计制定的SDH技术,以其高的可靠性、强的可控性、好的扩展性以及完善的网络体制,在现在传输网中占着主导地位。目前国内各通信运营商的传输网络均是以较大规模光纤SDH传输网为主体。但随着数据业务的应用和发展,业务需求IP化和大颗粒化的特点越来越明显,以SDH为主的传输网络的网络结构也需要随之改变,本文依据葫芦岛市电信分公司的3G网络的建设需求,提出传输网的设计方案。通过对传输网优化,来改进现网存在的问题,完善原有的SDH传输网络。文中介绍了SDH传输网络的基本原理及特点,然后通过葫芦岛市电信公司的实例做出设计方案,在设计部分给出了网络优化后的拓扑方案,将原有的兴城市、绥中县两个地区的传输接入环进行拆分,组成多个新的接入环网结构。在实现部分,详细介绍了割接优化操作方案,保证了割接过程的安全性,充分验证了SDH自愈环保护的技术特点。重点阐述了SDH传输网络在容量扩容和提高安全性两个方面的实现。最终通过对网络的性能指标的测试,对优化前与优化后的数据进行比对,并对比对结果做出了分析。测试结果表明通过优化的传输网络大大提升了网络的可靠性、安全性,同时也提高了网络接入容量。更多还原

【Abstract】 In 1966, the British-Chinese scholars Charles Kuen Kao and Hawk hamm published a paper about a new concept of the transmission medium,which laid the foundation of the modern optical communication. After 40 years of development, with the development of the quasi-synchronous digital hierarchy (PDH), Synchronous Digital Hierarchy (SDH) and other digital transmission system,there has been many new technologies in the optical communication such as Multiservice Transport Platform (MSTP) and Automatic Switched Optical Network (ASON) etc in recent years. Overall, the development trend of the optical network technology reflected in three aspects:in shape, it is going to be the fusion of transfer and exchange; in the hardware, it is going to be the all-optical networks; in the software, it is going to be the intelligent network. The optical communication become pluralistic in society nowdays.There is a rapid development in the communications infrastructure.the Optical access network has been gradually replace the conventional analog support loops. The SDH technology is already quite mature, its application has been reviewed by long-distance network to relay network, and finally access the Internet extensively throughout. As to be designed to carry TDM services, the SDH technology occupied a dominant position now, with its high reliability, strong controllability, good scalability and a comprehensive network system transmission network. The current domestic transmission network communications carriers are based on large-scale optical SDH transmission network as the main body.But with the application and development of data services, IP-based business needs and characteristics of large particles are more and more obvious, the SDH-based transmission network also needs to change in the network structure, this paper based on the needs of the telecommunications branch of Huludao City 3G network construction and proposed a transmission network design. Through the transmission network optimization, to improve the existing network problems and improve the existing SDH transmission network. This paper introduces the basic principles of SDH transmission network and characteristics, then made a design through an instance of Huludao City Telecom. the design section gives the network topology optimization program, the original Xingcheng, Suizhong two regional transmission access split ring, composed of a number of new access ring network structure. In the implementation section, detail the cutover optimized operation of the program to ensure the safety of the cutover process, and verify the technical characteristics of SDH self-healing protection fully. It focuses on the SDH transmission network capacity expansion and increases security of implementation.Final tests for the network performance are conducted, take optimizing data of before and after optimization for comparison and contrast to make the analysis of the results. The Test results show that it can improve the reliability, security and access capacity of network greatly by optimizing the transmission network.更多还原