基于SDN的汇聚接入网及其统一管控系统的研究

发布时间：2018-06-04 06:37

本文选题：汇聚接入网 + 网络管理层　；参考：《北京邮电大学》2017年硕士论文

【摘要】：随着网络技术的飞速发展和用户需求的快速增长,以及新型的网络业务不断涌现,各种业务的应用场景也愈发的复杂,网络IP(Intemet Protocol,网络之间互连的协议)化会导致未来网络的控制和业务逐渐发生变化,促进原有的技术和业务分层的垂直化网络向水平化网络演变。综合考虑社会的发展和用户的需求,高清视频等宽带多媒体业务、5G网络的提出等都对接入网的速率、带宽、覆盖范围提出了更高的要求。与此同时,不同类型的用户对于网络流量和使用时间的需求存在很大的差异,这就要求网络的汇聚层和接入层具备网络资源灵活分配的功能。因此,当前的城域汇聚网和接入网主要面临着以下两方面挑战:(1)随着用户对于高清视频、网络游戏等业务的需求不断增加,以及应用场景的不断拓展,提升网络容量、增加网络带宽和扩大网络的覆盖范围是当前接入网发展的主要目标。(2)除了大容量、广覆盖的要求之外,接入网的业务流量具有很强的突发性,流量的大小随时间、地域波动非常之大,而网络速率的增加也会导致流量变化幅度的迅速增加。且来自不同类型的用户流量的大小差异较大。因此接入网需要实现灵活地分配带宽资源、支持不同等级的业务套餐等管控需求,通过灵活统一的管理系统,为用户提供更高的服务质量和更安全可靠的网络。根据以上发展需求,本文主要完成以下几方面的工作:一是在分析接入网的研究现状和发展趋势的基础上,研究由中心站、远端节点、光网络单元、城域汇聚密集型光波复用光纤环和接入时分波分复用/时分复用光纤树组成的基于软件定义网络的环形汇聚接入网网络结构,由此将汇聚网和接入网与软件定义网络相结合,满足接入网络可编程性、更大容量、更高带宽、更广覆盖、更有效的资源调度和分配的发展需求。二是研究基于软件定义网络的汇聚接入网统一管控系统。在网络的发展过程中,对于网络整体的管控是必不可少的一环,基于软件定义网络将数据层面和控制层面相分离的特点,搭建分为网络管理层、控制器层和代理层的分层管控系统架构,可以实现屏蔽底层设备差异、自动发现网络拓扑结构、对设备灵活配置、统一管控多域设备的功能,对汇聚接入网中的光网络单元、光线路终端、交换机、光开关等设备进行统一管控。并且此管理系统支持多虚商模式登录,实现在同一张底层物理网络之上运行多张彼此独立的虚拟网络的网络虚拟化功能。最后本文对统一管控系统进行相应的功能测试和应用场景分析,符合预期目标。
[Abstract]:With the rapid development of network technology and the rapid growth of user demand, as well as the emergence of new network services, the application scenarios of various services are becoming more and more complex. Network IP(Intemet protocol (protocol of interconnection between networks) will lead to the future network control and traffic changes gradually, and promote the original technology and service layered vertical network to horizontal network evolution. Considering the development of the society and the needs of the users, the high definition video and other broadband multimedia services, such as the proposed 5G network, have put forward higher requirements for the rate, bandwidth and coverage of the access network. At the same time, different types of users have different requirements for network traffic and service time, which requires the convergence layer and access layer of the network to have the function of flexible allocation of network resources. Therefore, the current metropolitan convergence network and access network are mainly facing the following two challenges: 1) with the increasing demand of users for high-definition video, online games and other services, as well as the continuous expansion of application scenarios, the network capacity will be enhanced. Besides the requirement of large capacity and wide coverage, the traffic flow of access network is very sudden, and the traffic is large over time. The regional fluctuation is very large, and the increase of network speed will lead to the rapid increase of traffic. And the size of traffic from different types of users varies greatly. Therefore, access networks need to allocate bandwidth resources flexibly, support management requirements such as service packages of different levels, and provide users with a higher quality of service and a more secure and reliable network through flexible and unified management systems. According to the above development requirements, this paper mainly completes the following work: first, on the basis of analyzing the research status and development trend of access network, the research is made by central station, remote node, optical network unit. The network structure of the confluence intensive optical multiplexing optical fiber ring and the access time division multiplexing / time division multiplexing fiber tree is based on the software defined network, which combines the convergence network and the access network with the software defined network. It meets the requirements of programmability, larger capacity, higher bandwidth, wider coverage, more efficient resource scheduling and allocation. Secondly, the unified management and control system of convergent access network based on software definition network is studied. In the process of network development, it is necessary to control the whole network. Based on the software definition, the network separates the data layer from the control level, and the structure is divided into the network management layer. The hierarchical management and control system architecture of controller layer and agent layer can shield the differences between the underlying devices, automatically discover the network topology, configure the equipment flexibly, unify the functions of multi-domain devices, and control the optical network units in the converging access network. Optical line terminals, switches, optical switches and other equipment for unified control. This management system supports multiple virtual quotient mode login and realizes the network virtualization function of running multiple independent virtual networks on the same underlying physical network. Finally, this paper carries on the corresponding function test and the application scene analysis to the unified management and control system, accords with the anticipated goal.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.1

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