动态空间信息网络的传输容量与关键技术

空间信息网是融合卫星骨干网、地面接入网及各种海陆空移动终端的混合网络。充分利用该网络中分层卫星骨干网的动态特性，可以降低无线信号传播延时、提高传播可靠性。本课题将根据传输任务的需求，利用对自组织网络中链路状态的诊断，基于渗透理论求解高速的信息传输路径，并通过网络编码理论和动态路由设计进一步提高传输容量。具体研究内容包括：1）链路状态诊断与动态路由：通过构建随机测量矩阵，结合扩展图理论实现链路状态的重构，并进行动态路由方案的设计和优化；2）节点协同与渗透：将按需协同分解为一个求解高速信息传输路径和卫星链路网络编码的问题，利用渗透理论对任意约定网络（Arbitrary Network）的传输容量进行分析。针对以上问题，本项目拟实现以下目标：通过网络链路状态的诊断以及节点协同和渗透，迅速构建满足任务需求的快速传输通道，并在该网络体系结构中融合动态路由和虚拟线等技术，从而实现信息的快速可靠传输。

Space Information Network (SIN) is characterized as the fusion of satellite backbone network, access network and a variety of sea, air and terrestrial mobile terminals. The radio propagation delay and reliability can be improved by taking full advantage of the dynamic property of the hierarchical satellite backbone network. To match the transmission task, the diagnosis results of ad-hoc network are used in this project to trace the route of space platform and network dynamics. Wherein, percolation theory will be employed to solve the route problem of high-speed data transmission. Network coding is used to further improve the system capacity. The research contents include: 1) Link state diagnosis: The random measurement matrix is built to reconstruct the link state based on the extended graph theory; 2) Node cooperation and percolation: the node cooperation is transformed into a problem to find the route of high-speed data transmission and network coding between satellite links. The capacity of arbitrary network is analyzed using percolation theory. This task aims to quickly formation of the high-speed data transmission route that can satisfy the demand through link state diagnosis, node cooperation and node percolation. The techniques such as dynamic route and virtual line are used in the network architecture to achieve high-speed reliable transmission.