基于SDN的vOLT系统适配层的设计与实现

Design and implementation of vOLT system adaptation layer based on SDN

为了解决接入网面临的挑战,文章基于SDN的思想,提出构建一个vOLT系统。该系统可以通过虚拟化实现接入网设备中数据平面和控制平面分离;通过集中化实现对接入网资源的统一管理、控制和调度;通过API应用接口实现接入网资源和能力的开放,从而实现面向应用和客户的智能化接入网。文章着重利用gRPC框架设计了vOLT系统适配层,剥离了传统OLT的部分功能,实现了ONU和OLT设备之间解耦。最后通过组网对适配层的功能进行验证,实验结果表明,在vOLT模式下,OLT支持ONU上线和配置功能。

In order to solve the challenges faced by access network,this paper proposes to build a vOLT system based on SDN.The system can implement separation of the data plane and the control plane in the access network device by using virtualization,the unified management,control and scheduling of access network resources by centralization,and the opening of access network resources and capabilities by API application interface,so as to realize the application-oriented and customer oriented intelligent access network.This paper focuses on the design of vOLT system adaptation layer using gRPC framework,stripping part of the functions of traditional OLT,and realizing decoupling between LEONU and OLT devices.Finally,the function of the adaptation layer is verified by networking.The experimental results show that OLT supports ONU on-line and configuration functions in vOLT mode.