V.A. Masnoy – Ph.D.(Eng.), Main Specialist, 

JSC «KRET» (Moscow)

E-mail: v.masnoy@kret.com

A.E. Skosarenko – Leading Engineer, 

JSC «Kaluga Scientific Research Radio Engineering Institute» E-mail: a.skosarenko@knirti.ru

In this paper the estimation of TCP/IP connection bandwidth is considered in the conditions of accidental change of external factors (instability of the physical medium of data transmission, delay of data packet transmission, taking into account the specifics of the channel-forming devices for connections, the format of the transmitted data, etc.), influencing the throughput of data transmission TCP/IP with fundamental analytical model in terms of capacity calculation. The TCP/IP connection bandwidth is estimated taking into account the probability of data loss, its limits when the optimal value is reached – the critical size of the congestion window (one of the main parameters the data transmission control, which can be used to judge the quality of the model: timeliness of data packet delivery, connection stability, reliability, etc.).

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