Chinese Space Science and Technology ›› 2019, Vol. 39 ›› Issue (6): 87-.doi: 10.16708/j.cnki.1000-758X.2019.0054
LYU Yuancao, WANG Fengchun, XU Nan, HAN Xiaodong, FENG Yanjun, XING Chuan
With the explosion of the internet traffic, the IPbased large volume data transmission provided by satellite network becomes a prerequisite to integrate satellite network and terrestrial network. Onboard router，whose transmission rate and QoS (Quality of Service) determine the throughput and efficiency of the entire network，is the key facility of the satellite network. Based on the low throughput of existing onboard routers, a design of high speed onboard router for LEO (Low Earth Orbit) satellite constellation is proposed. Implementing dynamic routing into the snapshotbased routing scheme makes it possible to minimize packet drop when link failure happens. This scheme enables iterative data switching after one time route computing. By using sharedmemory mode to build switchingmemory unit, also with Spacewire and Serdes interface units deployment, the intersatellite throughput can achieve up to 51 Gbit/s in theory. Moreover, the onboard router supports IPbased transmission, which lays the foundation for integrating with terrestrial network.
satellite onboard router,
LYU Yuancao, WANG Fengchun, XU Nan, HAN Xiaodong, FENG Yanjun, XING Chuan. High speed onboard router based on LEO constellation[J]. Chinese Space Science and Technology, 2019, 39(6): 87-.
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