Design and Implementation of Low-Latency Router for Space Network

Space network which has important significance for the realization of national security strategy, consists of several satellites and ground stations. The satellites communicate with each other through high-speed laser links. One of the core components of satellite network is routers, which affects the overall performance of space network directly. After investigating the technology of high-performance router, we come up with topological structure of space network router. The main modules are optimized to reduce the latency in the router. In accordance to space harsh environment, fault tolerance and self-recovery design for space router are carried out. The space router with low-latency and high reliability meets the application requirements of space network. The main features of the router include: packet forwarding delay is less than 10us; data frames can be transmitted in multi-channels concurrently; single-channel fault does not spread and can be recovered autonomously.