Design and Implementation of High-Performance Space Router Based on FPGA

Abstract

Routers play an important role in space network. Currently, aero-space ICs are not available for space routers, and the high-performance forwarding technology is generally implemented by FPGA in space network. 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. The data flow comprises direct path, shared buffer path and solid-state storage path, which increases the throughput and reduces the loss rate. The large-capacity solid-state storage also supports DTN network. In accordance to space harsh environment, fault tolerance and self-recovery design are carried out. The main features of the router include: The throughput of the space router is 9.6G/s; 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.