Performance Evaluation of Frequency Flexibility in High-Throughput Satellites: Application to Time-Varying Communication Traffic

抄録

In this study, we propose a frequency assignment method for high-throughput satellites (HTSs) with frequency flexibility. To meet the increase in communication traffic, next-generation HTSs will be equipped with digital channelizers and a frequency flexibility function, which can flexibly change the frequency assignment. Using this function, the bandwidth resources can be efficiently utilized. We propose a flexible channel assignment method to achieve higher throughput with fewer control actions, compared to conventional methods. This method divides the bandwidth into two types: one involves fixed assignment, whereas the other is utilized flexibly. The effectiveness of the proposed method is verified through numerical experiments, and the performance is compared with those of conventional methods. In these experiments, two different types of time-varying traffic, aircraft and disaster traffic, are assumed. It is established that the number of control actions in the proposed method is lesser than that in the conventional dynamic assignment method, with almost the same throughput as the conventional one.