支撑软件定义弹性光接入网的承载架构与关键技术研究

The Software Defined Optical Access Network (SDOAN) concept extends the benefits of Software Defined Networking into broadband access, and makes rigid access pipes become flexible, open and smart, which is an important developing direction for broadband access networks in the Internet era. Its bearing structure model, flexible transmission theory and mechanism, resource control mechanism are key problems for SDOAN that need to be solved in the present. This project mainly focuses on the following aspects: (1) Physical bearing architecture model for SDOAN (2) Bearing method and mechanism for programmable and flexible transmission (3) Multi-dimensional resource joint management and scheduling algorithms on wave domain, frequency domain, time domain and modulation format. On the basis of the SDOAN concept, establish simulation platform and experimental system to verify our proposals..Based on these innovative scientific studies and experimental works, we expect to make breakthroughs for SDOAN in the follows aspects：Bearing architecture of SDOAN; Model of software-defined flexible OLT、RN、ONU and other key units；Flexible and reconfigurable ODN technology; Flexible and controllable transceiver theory and technology on rate、modulation format、carrier etc; Adaptive dynamic injury suppression and parallel DSP algorithms; Multidimensional resource joint management and allocation algorithms. The research results provide a steady base in theory and technology for the realization of SDOAN, and effectively support the development of broadband networks in the Internet era.

将SDN理念引入光接入网络，使僵化管道变得灵活、开放、智能，是互联网时代宽带网络的重要发展方向。其承载架构模型、灵活传输理论与机制、资源管控机理是当前亟需解决的关键问题。本项目重点研究（1）支撑软件定义弹性光接入网的物理承载架构模型；（2）可编程的灵活传输承载方法与机理；（3）波域、频域、时域及调制格式等多维度资源联合管理与调度算法。基于上述研究建立仿真平台和实验系统对技术与方案进行验证。.通过以上创新性科学研究和实验工作，拟在：软件定义弹性光接入网承载架构；支持软件定义的灵活OLT、RN、ONU等关键单元建模与设计；灵活可重构ODN技术方案；速率、调制格式、载波等多维度灵活可控收发机理论与技术；自适应动态损伤抑制及并行处理DSP算法；多维度资源联合管理与分配算法等方面取得重要突破。预期成果可为构建软件定义弹性光接入网奠定坚实的理论与技术基础，有效支撑面向互联网应用的宽带网络发展。

将SDN理念引入光接入网络，使僵化管道变得灵活、开放、智能，是互联网时代宽带网络的重要发展方向。其承载架构模型、灵活传输理论与机制、资源管控机理是当前亟需解决的关键问题。本项目重点研究了：（1）提出了面向多业务融合的环树形软件定义弹性光接入网架构，包括架构中所涉及的关键器件结构。并对架构的生存性保障机制和节能机制进行了详细研究；（2）对比分析了上下行光传输系统不同调制码型性能，研究了并行时域均衡技术，基于IMDD 半周期副载波调制M-QAM 的比特率可变收发机技术，50Gbps TDM-PON 下行传输方案与DSP处理方案，基于单偏振强度调制发射和相干检测的上行光传输方案；（3）研究了软件定义弹性光接入网中资源调度算法、公平性感知联合多维资源分配算法以及基于云、边缘协同计算的高效光前传网络切片算法；（4）实验验证了50Gbps TDM-PON 下行传输方案与DSP处理方案，基于单偏振强度调制发射和相干检测的上行光传输方案；（5）提出了软件定义云接入网带宽预订系统设计方案，并基于开源控制器OpenDayLight和数据平面的实体设备搭建平台进行了实验验证。基于上述创新性研究成果，项目组在IEEE Communications Magazine、 Journal of Lightwave Technology等国际学术期刊以及OFC、CLEO等国际学术会议上发表了学术论文26篇，其中 SCI 检索论文10篇、EI检索论文16篇（含刊源）；申请了国家发明专利6项。