High Performance Inter-satellite Routing Design of Terahertz Interface

The 6G network will be a new type of network integrating ground and satellite networks. Terahertz technology will provide wider communication links for the 6G network. Deploying an edge cloud service platform with caching and computing capabilities on the satellite network cloud service platform based on 6G will become an effective supplement to the ground cloud service network, while the named data networking (NDN) with content caching, request aggregation, intrinsic multi-path transmission and inherent security has become an architecture of low-orbit satellite networks. However, the current complex forwarding mechanism and large name prefix routing table of the NDN network result in lower forwarding and routing efficiency, which is not compatible with the high-bandwidth data transmission rate of terahertz. Moreover, the existing NDN forwarding mechanism uses static routing configuration, so cannot adapt to the high dynamic topology changes in satellite networks and efficient forwarding and routing requirements of terahertz high-speed communication. To address these issues, this paper conducts routing design research for inter-satellite high-speed communication based on the NDN network, and the main contributions are as follows: For the demand of high-speed forwarding in inter-satellite communication based on terahertz communication, a new NDN network routing and forwarding method is proposed. Based on the data plane development kit (DPDK) for high-speed data distribution, each routing node periodically requests the routing table update information of adjacent forwarding nodes, which achieves dynamic content routing table updates across the entire network and meets the high-speed forwarding requirements of inter-satellite communication. The proposed routing scheme has been tested on a hardware platform, and it is verified that it can achieve high-speed and stable data distribution.