Space Information Network Virtualized Communication Design of Terahertz Interface

With the expansion of network scale, the field of space information network will face the challenges brought by the development trends of complex structure, dynamic environment and diverse business. In the future, the 6G network will integrate both ground and satellite networks, and terahertz technology will provide wider communication links for it. Deploying edge cloud service platforms with caching and computing capabilities on 6G-based satellite network cloud service platforms will serve as an effective complement to ground cloud service networks. The traditional network architecture is not sufficient to support the high-speed and complex data services in space information network based on terahertz interface, and also cannot meet the requirements of high-speed routing switching. NDN with content caching, request aggregation, inherent multi-path transmission and intrinsic security is more suitable for complex multi-service network environments by combining virtualization technology. However, now, the cumbersome forwarding mechanisms and large name prefix routing tables of NDN result in lower forwarding efficiency, which cannot adapt to complex network topology combined with virtualization technology and the efficient demands for forwarding and routing of high-speed inter-satellite communication based on the terahertz interface. To address these issues, this paper conducts research on space information network using NDN transmission based on the terahertz interface. The main contributions are as follows: For the business differentiation and high-speed forwarding demand in inter-satellite communication based on the terahertz interface, NFV technology is used to provide network slicing services and software defined control is used to maintain the FIB of NDN, thus adapting to the high-speed and complex routing update requirements, solving the high-speed forwarding problem of complex network architecture, supporting the dynamic allocation of network resources and maximizing the utilization of inter-satellite network resources. The communication mode proposed in this research has been validated through hardware platform testing, demonstrating its capability to achieve high-speed and stable distribution of multiple business data.