天基信息网络的软件定义网络应用探析

现有各种空间、地面网络节点的互连互通，在一定程度上可满足特定应用需求，但由于各节点在空间、物理以及功能的局限，限制了天基信息高效传输、融合以及按需地应用。分析了天基信息网络的发展趋势，提出了网络架构构想，并对主要关键技术的研究方向进行了梳理。在空间核心节点上采用软件定义的多功能载荷平台，并基于软件定义网络( SDN)架构和空间容中断网络协议构建天基信息网络。通过资源虚拟化、处理多元化、应用无阻化的方式，保障天基信息网络适应信息按需定制和高效共享等应用需求。

Application discussion of software defined network in space-based information network

The interconnection of the existing space-ground network nodes can satisfy the specific need of the space-ground information network application to a certain extent. However,due to the limitation of the space,physics and function of the nodes,effectively transmitting,combining and on-demand applying the space-based information is restricted. In this paper,the developing trend of the space-based network is analyzed. A conception of the network is discussed. The research trend of the key technologies is compiled. In addition,it is proposed that the space-based information network may be constructed by the load platform of multiple functions defined by the software on the space core nodes,the architecture of the software defined network(SDN) and the space delay-tolerant network(DTN) protocols. And then,the resource virtualization,the process diversification and the application intelligence of the network may be achieved. In the future,the network will satisfy the application requirement of information customization and efficiently sharing etc.