基于网络编码的空间信息安全传输机制研究

Space information networks face a serious threat eavesdropping as the characteristics of wide-range open channels, distributed multi-hop forwarding and so on. There are outstanding contradictions among security and network effectiveness and reliability because the networks are dynamic time-varying and resource-constrained, but security mechanisms need to competitive resources. Aiming at the above two problems, this project will research the information secure transmission mechanism combining network coding and routing protocol. The main research contents are as follows: (1) The space information network topology model based on the empowerment space-time graph. In this part we will construct topology model which expresses the space-time correlation of nodes and links and dynamic change based on the space-time graph. On the other hand, based on multi-domain cognition, the network resources and service capability will be evaluated. Then, multidimensional spatial and temporal information such as network computing, storage, communication and coding conditions will be represented in real-time and dynamically to achieve the network running situational awareness of large-scale spatial and temporal constraints and high dynamic conditions. (2) The space information security transmission mechanism based on network coding. In this part we will research the code-aware routing metric, smart routing establishment, maintenance and optimization mechanism. And in the process of information routing and transmission, we will design joint coding oriented to different network applications and different information flow to collaborative enhance the space information transmission security, reliability and effectiveness. The expected research results will provide theoretical basis and technical support for the space networks construction of our country.

由于空间信息网络具有大范围开放信道、分布式多跳转发等特点，使其面临着严重的窃听威胁。网络动态时变、资源受限，安全机制需要竞争资源，与网络的有效性、可靠性矛盾突出。针对以上两个问题，本项目研究网络编码与路由协议相结合的信息安全传输机制，主要研究内容包括：（1）基于赋权时空图的空间信息网拓扑模型，包括构建基于时空图的节点、链路时空关联与动态变化的拓扑模型，基于多域认知对网络资源与服务能力进行评估,对网络计算、存储、通信和编码条件等多维时空信息动态实时表征，实现大尺度时空约束、高动态条件下的网络运行态势感知；（2）基于网络编码的空间信息安全传输机制，包括研究编码感知的路由度量指标体系，智慧路由建立、维护和优化机制，在信息路由传输过程中，设计面向不同网络应用、不同信息流的联合编码方法，协同提升空间信息传输安全性、可靠性和有效性。项目预期研究成果将为我国空间网络的建设提供理论依据和技术支撑。

由于空间信息网络具有大范围开放信道、分布式多跳转发等特点，使其面临着严重的窃听威胁。网络动态时变、资源受限，安全机制需要竞争资源，与网络的有效性、可靠性矛盾突出。针对以上两个问题，本项目研究网络编码与路由协议相结合的信息安全传输机制，主要研究内容包括:(1)基于赋权时空图的空间信息网拓扑模型，包括构建基于时空图的节点、链路时空关联与动态变化的拓扑模型，基于多域认知对网络资源与服务能力进行评估,对网络计算、存储、通信和编码条件等多维时空信息动态实时表征，实现大尺度时空约束、高动态条件下的网络运行态势感知;(2)基于网络编码的空间信息安全传输机制，包括研究编码感知的路由度量指标体系，智慧路由建立、维护和优化机制，在信息路由传输过程中，设计面向不同网络应用、不同信息流的联合编码方法，协同提升空间信息传输安全性、可靠性和有效性。项目研究成果将为我国空间网络的建设提供理论依据和技术支撑。