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传统光网络中的控制方法严重地依赖于底层硬件资源部署和顶层网络应用需求,不利于在大规模光网络中进行灵活控制。该文引入软件定义网络的设计思想,研究了传统有限状态机中的状态转移规律,提出一种适用于大规模光网络灵活控制的通用可编程有限状态机(pFSM)模型,并基于路径计算单元(PCE)架构设计出一套灵活控制系统。在此基础上搭建了多域异构光网络实验平台,完成了不同交换粒度域内和跨域业务的建立和拆除实验,并对重路由业务的恢复过程进行了实验测试。实验结果表明:该系统可在多域异构光网络环境下实现业务的动态控制和灵活调度功能。
The control method in the traditional optical network relies heavily on the deployment of the underlying hardware resources and the requirements of the top-level network applications, which is not conducive to flexible control in a large-scale optical network. This paper introduces the design idea of software defined network, studies the state transition law in the traditional finite state machine, and proposes a general programmable finite state machine (pFSM) model suitable for flexible control of large-scale optical networks. Based on the Path Computation Unit (PCE) architecture to design a flexible control system. On this basis, a multi-domain heterogeneous optical network experiment platform is set up, experiments of establishing and removing services in different switching granularity domains and cross-domain services are completed, and the process of rerouting services is experimentally tested. The experimental results show that the system can realize dynamic control and flexible scheduling in multi-domain heterogeneous optical network environment.