All communication systems must be controlled by strong traffic management architectures. In such systems, many calls are transmitted through many nodes. In this way, a call is blocked if the system is overloaded or the link between the current nodes is deactivated. In this study, we analyze and control the traffic of our sample communication system under different criteria to avoid these problems. We consider low-earth orbit (LEO) satellite systems, because satellites become a vital requirement for today's dense communication areas. We present a mathematical model to calculate call blocking probabilities (CBPs) with a new traffic density function which is based on coverage areas and current time slots. We also use the channel numbers of the links between satellites in CBP formulas to specify the communication lines and to mean different delivery buses for the calls. Then we compare the results under different CBP values.
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