Currently existing wireless communication systems can provide either stable and highly reliable connection with low data transmission speed (e.g.

radio signal) or high-speed but unreliable connection via a laser channel.

The efficiency of a laser channel depends greatly on weather conditions, such as fogs and snow falls, which reduce the stability of server connection.

In order to be able to create technologies combining high speed and reliability, RUDN mathematicians developed a model of a simple system consisting of two unreliable servers and one common queue for waiting customers.

After analyzing such a hybrid model the scientists demonstrated that heterogeneity of servers helps to increase speed and reliability of data transmission systems.

We've also carried out quantity evaluation of the influence of various parameters on such reliability characteristics and found out what values are required for optimal system operation," says Dmitry Efrosinin, the author of the work, PhD in physics and mathematics, assistant professor at the department of the probability theory and mathematical statistics.

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