350 rub
Journal Radioengineering №5 for 2015 г.
Article in number:
Data channel opto-electronic devices with the release of frame realtime
Keywords: data network optical-electronic tools measuring systems tracking data moment generating function of the square of the coefficient of variation the stationary regime the queuing system M/G/1
Authors:
V.P. Koryachko - Dr.Sc. (Eng.), Professor, Honored Scientist of RF, Head of Department, Ryazan State Radio Engineering University. E-mail: sapr@rsreu.ru A.P. Shibanov - Dr.Sc. (Eng.), Professor, Ryazan State Radio Engineering University. E-mail: mail@shibanov.ryazan.ru O.V. Lukyanov - Post-graduate Student, Head, Rocket and Space Center TsSKB  Progress  Special Design Bureau Spectrum. E-mail: luk_ov@mail.ru
Abstract:
A method is proposed to improve the probability-time characteristics of the data channel of opto-electronic means, which receives frames from multiple systems of measuring complex and transfers them to the processing center and the decision-making on man-agement of flight tests. It is based on the determination of the characteristic function of measuring the transmission time of the frame information from restriction of processing time frame in the transmission channel. The total input stream from multiple measuring systems is characterized as simple. Frame transmission through a communication channel is described by the Erlang distribution of the second order. The transmission time is associated with a frame length. Stand out from the input queue and transmitted frames with constraint length, which contain optoelectronic real-time information. Frames of greater length are stored in a separate storage tank and transferred after the session of the real time frame. Restriction on frame length can be varied by the user. Transmission is primarily short frames improves the queuing system in a steady operation mode in the transmission frame real time. These include: the average number of personnel in the system and queue, the average residence time of the frame in the system and queues. The aim is to find the effect of the changes limiting the length of frames of real time on a probability-time characteristics of the channel. Need to find a value at which the designer can get a satisfying relationship between the number of its personnel and detainees degree of increase of the input stream, which can be achieved in steady-state operation of the channel. Is the conditional probability distribution function taking into account that the total processing time of the frame with limited length does not exceed r. It determines the characteristic function of time frame transmission of real-time and its LaplaceStieltjes transform. According to the formula of PolyachekKhinchin system, M/G/1 defines the mean number of frames in the system and the number of frames in the queue. Averages residence time frame a real-time channel and queue are given by Little. Increasing the number of transferred to a separate drive frame reduces the average residence time of the applications in the channel and the possibility of raising the input load in the transmission of frames of real time. The proposed method can be used to construct models of the channel in which the transmitted frames opto-electronic information frames with different lengths real time.
Pages: 41-45
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