天地一体化网络中并行星间路由及无缝星地链路切换研究

项目名称： 天地一体化网络中并行星间路由及无缝星地链路切换研究

项目编号： No.61272467

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 宋广华

作者单位： 浙江大学

项目金额： 80万元

中文摘要： 随着各类航天器技术的发展及工程的实施，天地信息网络正逐步形成，构建天地一体化互联网势在必行。高效路由算法与协议是保证天地一体化网络中信息传输可达性和服务质量的基础。本项目针对卫星网络的动拓扑、常中断、动信号、变时延等特点，研究基于全局时空优化的星间多路径并行路由技术，设计相应的路由协议，以期达到星间路由的高效率。我们的策略是在地面利用卫星运动和星间链路历史数据、可预测的卫星网络拓扑结构、以及准实时的星间链路信息，建立卫星与链路状态知识库，进行基于集中计算、满足多QoS需求的全局准实时多路径路由预规划，并在星上基于实时监测的星间链路信息和业务数据聚类对预规划方案进行实时规划，形成经过时空优化的多路径并行路由方案。另外，项目将研究应用层连续的星地链路切换技术，以提高地面设备与卫星网络之间的接入质量，实现端到端无缝连接。在此基础上，对并行路由算法和星地链路切换技术进行软件模拟和地面仿真。

中文关键词： 天地一体化网络；多路径路由；无缝切换；软件定义网络；并行传输

英文摘要： With the development and project execution of various spacecrafts, mutual sharing and exchanging of information between space and ground is emerging. Therefore, it has become an inevitable trend to establish the space-ground interconnection network. Efficient routing algorithms and protocols are the basis for the space-ground network to provide high information arrival rate and high Quality-of-Service of communications. In this project, we study multi-path parallel routing technology and protocol for the satellite network with inter-satellite links, based on global space-time optimization, to deal with the characteristics of the network, such as dynamic topology, frequent interrupt, dynamic signal level, and variable network delay. Firstly, we establish a centralized knowledge-base for the status of the satellites and the inter-satellite links, and create a pre-arranged quasi real-time multi-path routing scheme. Secondly, we enforce real-time routing on the satellite based on the pre-arranged scheme, the real-time information about the satellite links, and the business data clustering, and produce a real-time multi-path parallel routing strategy. In addition, we will do research on Ground-Space Link (GSL) switching that provides uninterruptible service for upper layer applications. Lastly, we will establish a se

英文关键词： space-terrestial network；multi-path routing；seamless handover；software-defined networking；parallel transfer