基于MoCA的EoC局端的研究与软件设计

发布时间：2019-01-03 13:26

【摘要】：近几年,信息化迅猛发展,国家十分重视此项工作,并将“三网融合”作为要紧任务列入国家发展路线中。走“三网融合”发展路线,是国家应对经济快速发展的重要办法,更是推动信息化、培育科学型新产业的重要任务。为了适应网络建设的发展趋势,需加快建设双向网改造的步伐,降低改造成本,保证用户使用速度,并充分利用广电原有HFC网络资源。本文基于这些要求的考虑,通过分析EoC技术,选择了MoCA标准作为网络接入层的首选接入标准。本文首先分析了MoCA和其他同轴电缆接入技术,通过核心技术及适用环境的对比,重点说明了基于MoCA标准的EoC技术更加适合目前楼栋入口的短链路接入。然后研究了MoCA协议,包括物理层功能、MAC层功能、信道绑定技术、链路安全技术。物理层采用OFDM技术,信道均衡化与降低噪声和码间串扰对信道的影响。MAC层用软件方式实现TDMA技术,减小传输抖动和延迟,满足QoS。信道绑定技术,解决带宽问题,易于产品升级。提出软件解决方案,研究局端系统的架构和数据通信流程。采用基于嵌入式Linux的软件开发,搭建交叉编译开发环境。局端系统采用熵通公司MoCA2.0标准的EN2710芯片,接入速率高,稳定,芯片集成度高。并分别从CLI、WEB、SNMP三种方式对局端系统的接口层进行设计,特别是完成通过SNMP协议对系统的管理,对系统的正常运行和维护非常重要。最后,在实验室环境下,对局端系统进了测试,包括组网能力、接入速率、安全性方面等。在家庭联网技术中,MoCA标准具有高稳定性高带宽的显著优势。本文采用嵌入系统进行软件设计,研究内容具有可扩展性和可移植性,具有一定的实用价值,给“三网融合”的接入网设计提供了一种参考方案。另外,产品的链路衰减问题和兼容性问题,后期还需要更深一步的研究。
[Abstract]:In recent years, the rapid development of information technology, the state attaches great importance to this work, and "three networks" as an important task in the national development line. It is an important way for the country to cope with the rapid development of economy by taking the development route of "three networks integration", and it is also an important task to promote information technology and cultivate new scientific industries. In order to adapt to the development trend of network construction, it is necessary to speed up the construction of two-way network transformation, reduce the cost of transformation, ensure the user's use speed, and make full use of the original HFC network resources of radio and television. In this paper, based on the consideration of these requirements, MoCA standard is chosen as the preferred access standard for network access layer by analyzing EoC technology. This paper first analyzes MoCA and other coaxial cable access technologies. By comparing the core technologies and applicable environments, it is emphasized that the EoC technology based on the MoCA standard is more suitable for the short link access at the entrance of buildings. Then we study the MoCA protocol, including physical layer function, MAC layer function, channel binding technology, link security technology. The physical layer adopts OFDM technology, channel equalization and the influence of reducing noise and inter-symbol crosstalk on the channel. The MAC layer implements TDMA technology by software to reduce the transmission jitter and delay and satisfy the QoS.. Channel binding technology to solve the bandwidth problem, easy to upgrade products. Put forward the software solution, the research bureau end system structure and the data communication flow. Software development based on embedded Linux is adopted to build cross-compiler development environment. The EN2710 chip of Entropy MoCA2.0 standard is used in the local system, which has high access rate, stability and high chip integration. The interface layer of the system is designed from three ways of CLI,WEB,SNMP, especially the management of the system through SNMP protocol, which is very important to the normal operation and maintenance of the system. Finally, in the laboratory environment, the local end system is tested, including networking capability, access rate, security and so on. In the home networking technology, the MoCA standard has the remarkable advantage of high stability and high bandwidth. In this paper, the embedded system is used to design the software. The research content is extensible and transplantable, and has certain practical value. It provides a reference scheme for the design of the access network of "three networks fusion". In addition, the problem of link attenuation and compatibility of products needs further research.
【学位授予单位】：武汉邮电科学研究院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN943.6;TP393.09

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