天地网络异构动态、资源异质时变，给天地一体化带来极大挑战。本项目针对这些特征，以天地网络结构一体化与可控管理、天地资源一体化与协同调度为中心，深入研究：(1)软件定义的天地网体系结构，提出拓扑、资源时变性联合控制模型与天地异质融合机理；提出控制器分层管控与协同机制，实现天地网络结构一体化；(2)天地资源融合模型，研究资源统一描述、时空演变机理与透明分配方法，实现天地资源一体化；(3)环境适变的天地协同传输方法，提出天地协作增益模型与自适应机制，设计天地透明、业务驱动的立体路由算法与多粒度优化模型；(4)传算联动的天地协同处理技术，提出数据关联驱动的天地动态传算方法。最后，开发仿真系统与验证应用。本项目将建立网络管理可控、异构动态透明、天地资源一体、传输处理协同的天地一体化信息网络理论与关键技术体系，取得系统的创新成果，对接我国建设天地一体网络空间的战略需求。

Topologies and resources in space-ground integrated information networks (SGIINs) are heterogeneous and dynamic, which greatly challenges the integration of these networks. Considering these characteristics, we will intensively investigate the following important issues, with the focus on architecture integration and controllable management, and resource integration and cooperative scheduling..(1) Software-defined SGIIN architecture. To integrate space-ground network architecture, we are going to propose space-ground integration models, concentrating on joint topology-resource control models to control their time-varying properties and heterogeneous feature fusion mechanisms in space and ground networks. And we will study management and cooperation mechanisms for layered controllers. .(2) Space-ground networked resource fusion models. To integrate resources in space and ground networks, we will study uniform resource models, spatial-temporal evolution mechanisms and space-ground transparent resource allocation methods. .(3) Environment-aware space-ground cooperative transmission approaches. We are going to propose the space-ground cooperation gain models and self-adaptive mechanisms, design space-ground transparent, service-driven multi-path routing algorithms and develop multi-granularity optimization models..(4) Space-ground cooperative processing techniques based on transmitting while processing. We will propose data-correlation-driven dynamic transmission and processing models for SGIINs.. Finally, we will develop a simulation system and verification applications. This project will deliver a set of innovative theories and key technologies for SGIINs, with the properties of controllable network management, heterogeneous and dynamic transparency, space-ground resource integration, and joint transmission and processing. These results will support strategic requirements for building a space-ground integrated cyberspace in China.