Effects of Saturation for High-Throughput Satellite Buses

Abstract

Bus saturation is deemed as one of the primary causes of delays in the data propagation between spacecraft components. However, the conditions under which bus congestion can affect measurements variability were not well characterized before. This work presents a bus saturation model and a set of experiments to characterize the bus performance of satellite missions for different traffic load, data rate, and synchronization periods. The results showed an increase of measurements variance of up to 18% caused by bus saturation. Additionally, an algorithm was proposed to reduce data delay by controlling saturation on the communication channel at operational level.

A Communication Protocol Design aimed at a Multi-Agent System Framework for Miniaturized Satellite Systems

“…In this case, CAN bus was used as the communication channel between the attitude and orbit control subsystem (AOCS), that is based on a multi-agent system application, and a distributed architecture of sensors. According to Carvajal-Godinez [12], the results show that the bus utilization increases linearly, in the function of the number of nodes in the network as long as the bus saturation is not reached. For MAES Framework maximum capacity of the I 2 C was not reached because the Launchpad ran out of RAM.…”