O.V. Rudakova1

1 FSUE «NTC «ORION» (Moscow, Russia)
1 rudakovaov@mcc.rsa.ru

In accordance with the document "Fundamentals of State Policy in the Field of Using the Results of Space Activities for the Modernization of the Russian Federation's Economy and the Development of Its Regions for the Period up to 2030," one of the main objectives of state policy is to increase the efficiency of using the results of space activities generated by the implementation of manned space flight programs and fundamental space research, as well as to create advanced technologies for comprehensive information and navigation support and space monitoring. One of the ways to achieve these objectives is to implement measures to improve the efficiency of information transmission in satellite communication channels. In accordance with the Federal Project "Satellite Communications and Earth Observations" of the State Program of the Russian Federation "Space Activities of Russia," which is part of the National Project "Development of Space Activities of the Russian Federation for the Period up to 2030 and for the Prospect up to 2036," it is planned to increase the number of subscribers in near-Earth orbits who use satellite relay technologies to transmit target and onboard information. In this regard, the task of increasing information content by increasing the speed of message transmission in satellite communication channels is very relevant in the context of the emergence of multi-orbital space systems in near-Earth space. Dynamic multiplexers, which are able to adapt the frame structure of multiplexed digital streams (MDS) to the current requirements of the compressed message sources (MS), have become widespread in satellite communication systems (SCS), which allows for a significant increase in speed compared to multiplexing systems with fixed frame positions allocated to the compressed MS. However, a significant drawback of dynamic multiplexers is the need to allocate a significant portion of the bandwidth for transmitting messages in the control channels (CC). In some cases, this portion can reach up to 20% of the bandwidth of the multiplexed communication channel. As a result, when it is necessary to compress MS, the total speed of which is close to the communication channel capacity, the quality of service decreases.

Objective – justification of the approach to resolving the contradiction between the need to increase the efficiency of message transmission in SSS channels with dynamic multiplexing and the lack of methods for reducing the volume of messages in dynamic multiplexers with restrictions on the capacity of SCS channels with dynamic multiplexing.

The paper considers an approach to solving the problem of increasing the transmission rate in communication channels with dynamic multiplexing in the SCS based on the organization of the MCP CC, which reduces the share of the frame allocated for transmission. The paper demonstrates the relevance of studying the processes of changing the MDS frame structures, which take into account the distribution of the probabilities of receiving messages in multiplexed streams. Based on the mathematical scheme of the death and reproduction process, a mathematical model of a digital stream with dynamic multiplexing has been developed, which allows for the synthesis of an algorithm for controlling the structure of an MDS frame, using economical methods for encoding messages in an MCP CC.

An approach to the organization of CC in communication channels with multiplexing in the SSS in the conditions of the random nature of theMS requests is proposed, which involves the placement of MS positions in the MDS frame, taking into account the economical coding based on the use of arithmetic progression and the randomized strategy for making decisions about the MS positions allocated in the MDS frame.

Rudakova O.V. Generation of messages in digital stream control channels with dynamic multiplexing based on arithmetic progression. Science Intensive Technologies. 2026. V. 27. № 1. P. 38−47. DOI: https://doi.org/ 10.18127/j19998465-202601-04 (in Russian)

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