SpaceFibre based spacecraft network case study
Yuriy Sheynin, Elena A. Suvorova, Nadezhda Matveeva, Alexey Khakhulin, Igor Orlovsky, Dmitry Romanov · 2014
SpaceFibre based spacecraft network is used as a case study of the real network, which SpaceWire based implementation was analyzed in [1]. The network structure has tree-based structure, includes dozens of different data sources (such as Telemetric System, Radiation Monitoring System, Control Block of Onboard Complex) and some data processing nodes (such as Central Computing Machine, Computer of the Engine Bay, Cosmonaut Consoles). We consider implementation of this network based on SpaceFibre technology with its advantages: quality of service mechanisms (guaranteed throughput, scheduling), possibility of galvanic isolation on physical layer. For this example we evaluate parameters for SpaceFibre network implementation, compare the results with reachable parameters for SpaceWire based network. The analyzed network includes some typical data flows - video information, measurement information from different sensors, command information. For different data types flow parameters and timing requirements are essentially differ.