【作者】 胡伟；

【导师】 李建华； 薄喜柱；

【作者基本信息】 上海交通大学 ， 电子与通信工程， 2007， 硕士

【摘要】 本文就ADSL终端远程管理的技术实现方案进行了研究和分析,在此基础上提出了在阿尔卡特公司的ISAM产品平台上实现该功能的可行性分析和系统设计。本文从DSL宽带接入通信网络规模的迅猛发展现状及其带来的网络运维难题,引出了实现ADSL终端远程管理功能的工程需求。对于DSLAM系统如何实现该功能,按照国家信息产业部相关技术规范的系统组网模型和要求,给出了业界的两大类技术实现思路,即PVC通道和EOC通道传输方案的比较分析,并选择了其中基于PVC通道的方案作为系统设计的实现方式。为了在产品平台上进行系统设计,本文结合阿尔卡特公司现有的ASAM/ISAM产品平台特点,就实现CPE远端管理功能的各种技术方案进行了详尽的可行性分析,方案分析的重点在于接口需求,协议栈的选择和实现方式,DSLAM系统内部对CPE管理报文如何在CPE-MM和CPE之间进行转发,使用SNMP代理还是使用NAPT地址转换以及SNMP消息的终结点的选择,通过充分的分析和比较,给出了优选的实现方案架构。在上述可行性分析的基础上,本文给出了实现该功能的子系统的各项需求分析和定义,通过格式化的用例和系统行为需求分解,使用面向对象软件工程的系统化方法完整而详尽地定义了系统的需求。基于这些需求分析,本文提出了系统的高层设计方案,包括软件系统的子模块定义,功能划分,与外围子系统的接口,系统用例和应用场景需求的枚举分析及应用交互流程的定义;同时结合系统硬件平台的特点分析了软硬件系统配合上的协调问题,特别是用户接口板上的处理芯片如何对相关PVC流量进行处理和控制,如何在系统上层软件的控制下完成需求定义的相关交互流程操作;另外还针对DSLAM系统内部的管理通信流进行了带宽/QOS/过载保护等方面问题的分析,进一步论证了系统的可行性。最后本文还给出了CPE管理系统功能和性能测试的实例,通过系统的配置和对PING,FTP和PPPOE等主要功能以及高负荷性能的测试,验证该系统实现了设计要求的主要功能。本文对ADSL宽带接入用户终端的集中管理提出了解决方案,并给出了具体的系统设计和实现,这个系统解决了复杂的网络通信技术和用户易用性的矛盾,显著地提高了网络维护工作的效率以及用户的方便性和满意度。随着宽带接入技术的发展和业务的丰富,这一课题的内涵也正在不断扩大和延伸之中,如对多业务宽带家庭网关设备的管理正在成为研究的热点,相关的讨论和技术标准化工作已经在进行中。这些相关技术的发展将给人们的现代化网络生活带来更大的便利。更多还原

【Abstract】 In this thesis, an in-depth study on the technical solution of ADSL CPE remote management is given. On the basis of that, a feasibility study of system implementation with the Alcatel DSLAM platform is introduced. The functional subsystem architecture design is also presented in the topic of this thesis.An urgent requirement of CPE remote management from Telecom Operator has been raised recently, since the ADSL broadband access network is getting more and more popular, which makes the work for bulk CPE configuration, diagnosis and troubleshooting become a really tough job. According to the specification of CCSA on this topic, two candidate solutions to implement the management channel, EOC or PVC over ADSL line have been studied in detail. The latter was chosen as the final one after the evaluation in terms of performance, reliability and standard compliance, etc. To introduce this function into the feature of DSLAM product of Alcatel, a feasibility study is given from technical point of view, with focus on how to relay the management messages between CPE-MM and CPE in the ISAM/ASAM platform. Analysis on alternative proposal of SNMP proxy and NAPT architecture is also presented. The final conclusion was drawn with consideration of several important points of implementation in the specified product.On basis of the study, a top level design of the CPE proxy subsystem is given, which includes requirement analysis, system module decomposition, list of use case and application scenario, definition of subsystem interface to other modules of the system. A detail study on the issues of management traffic bandwidth/QOS/Overload is also presented to ensure the feasibility of the proposal. A test case on the main function and ultimate performance of system is introduced at last to demonstrate it has met the main functional and performance requirements of system design.The solution and implementation presented in this thesis could help significantly improve the efficiency of network OAM(Operation and Maintenance) and customer satisfaction. With the development of broadband access technology and services, the content of this topic is getting richer. Surely it will bring more convenience to our modern network life.更多还原