Stochastic performance analysis for LEO inter-satellite link based on finite-state Markov chain modeling

The instinct characteristics and advantages of low earth orbit (LEO) communications satellites have made LEO satellite communication an important trend in the future communications. For such a communication system, inter-satellite link is an essential part. However, due to its time-variant nature caused by e.g., light-of-sight (LOS) effect, Doppler frequency shift and noise, the data transmission performance of the link exhibits stochastic behaviors, which consequently challenges performance evaluation of the link's Quality of Service (QoS). The aim of this paper is to address this challenge. Specifically, we model the link using a finite-state Markov channel (FSMC). In addition, we analyze the delay and backlog performance of data transmission over the link by making use of a newly developed theory: Stochastic Network Calculus. Furthermore, numerical results are presented, from which discussion and conclusion are made providing insights on how different parameters may affect the data transmission performance of the link.