基于OpenFlow的LR-PON架构及核心器件设计

发布时间：2018-03-25 00:34

本文选题：软件定义光网络　切入点：城域-接入网　出处：《山东大学》2017年硕士论文

【摘要】：伴随着大数据时代的到来,信息量与数据业务飞速增长,为满足向着随机、突发、多变方向发展的业务需求,替代已无法支撑当前需求的现代网络的下一代光网络被人们所提出。下一代光网络应当向着动态、灵活、可重构的方向来发展,一种全新的解决方案----软件定义的光网络登上了历史舞台。软件定义光网络的发展打破了传统网络的模式,它将网络节点的智能化统一集成至控制层面,使得控制和转发的分离,能够实现集中式的网络控制管理和开放的网络功能开发。在此基础上,本论文针对城域接入网场景优化设计了 WDM-Long-Reach-PON的城域接入网网络架构,并提出了一种可响应控制层灵活管控的位于远端节点的关键器件来实现可重构的分插复用功能。该架构采用了基于SDN的集中控制管理模式,实现对全网资源的集中化管控和网络资源的调度。与此同时,所设计的关键器件能够响应SDN控制器对网络资源的分配和调整,并通过动态、灵活地实现网络功能提高了资源的利用率。针对未来网络灵活、动态和可重构的网络发展方向,本论文利用所抽象的网络模型和Mininet、OVS等软件,在所建立的模型之上设计了基于最短路径算法的路由选择实验及虚拟机迁移实验,模拟了网络资源拥堵的情境下软件定义光网络的应对措施及结果。论文对软件定义光网络关键节点设计了能响应控制层调度的网络核心器件——可调谐的AWG滤波器。该滤波器可以契合下一代网络动态、灵活、可重构的发展要求,快速、灵活的根据控制器信号调整网络资源,为路由的选择算法提供了基础。并且,仿真结果证明了该器件拥有令人满意中心波长和带宽调谐的能力。本文通过完成对所提出的城域-接入网网络架构进行优化和仿真,对下一代网络的架构和发展提供了一定的贡献和参考。
[Abstract]:With the arrival of big data era, the amount of information and data business is growing rapidly, in order to meet the needs of business development in the direction of random, sudden and changeable. The next generation optical network, which can no longer support the current demand, has been proposed. The next generation optical network should develop in the direction of dynamic, flexible and reconfigurable. A new solution, the software-defined optical network, is on the stage of history. The development of software-defined optical network breaks the traditional network mode, and it integrates the intelligence of network nodes into the control level. So that the separation of control and forwarding can achieve centralized network control management and open network function development. On this basis, this paper optimizes the design of WDM-Long-Reach-PON metro access network architecture for the metro access network scene. A flexible remote node controlled key device in the responsive control layer is proposed to implement the reconfigurable add / drop multiplexing function. The architecture adopts the centralized control management mode based on SDN. At the same time, the key devices designed can respond to the allocation and adjustment of network resources by SDN controller, and dynamically, The flexible realization of network functions improves the utilization of resources. In view of the future network development direction which is flexible, dynamic and reconfigurable, this paper uses the abstract network model and Mininett OVS software, etc. Based on the established model, a route selection experiment based on the shortest path algorithm and a virtual machine migration experiment are designed. The response measures and results of software defined optical network under the circumstance of network resource congestion are simulated. The tunable AWG filter is designed for the key nodes of the software defined optical network, which can respond to the scheduling of the control layer. This filter can fit the next generation network dynamics, Flexible, reconfigurable development requirements, fast, flexible to adjust network resources according to controller signals, which provides the basis for routing algorithm. The simulation results show that the device has satisfactory central wavelength and bandwidth tuning capability. In this paper, the proposed metropolitan area access network architecture is optimized and simulated. It provides a certain contribution and reference to the architecture and development of the next generation network.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN925.93

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