Lozhkovzkyi A. The analysis and synthesis of information distribution system in conditions of multiservice traffic

Object of the research – providing of broadband services by telecommunication networks. Research subject – methods of analysis and synthesis for information distribution systems under multiservice traffic conditions created by requests for telecommunication services; quality of service under multiservice traffic conditions. Methods of research: researches of the Doctor’s Thesis are carried out with the help of queuing theory, teletraffic theory and probability theory. Accuracy of proposed solutions is estimated with the help of object-oriented programming and simulations including methods of mathematical statistics. The work is aimed at solving fundamental scientific problem concerning development of new methods of analysis and synthesis of complex (on structure) systems of information distribution, telecommunication and infocommunication networks, operating under multiservice traffic conditions. New scientific results. Three types of multiservice telecommunication networks corresponding to the whole network or some its segments are classified. The extent of traffic difference is determined by a peak factor. QoS estimation methods are worked out for every type of traffic processed by the systems represented by the M/D/m/?, MB/M/m, HM/G/m, HM/D/m/?, fBM/G/1/?, G/M/1/? та G/D/1/? models. Analytical connections between all the QoS parameters were found for the G/G/1/? model. Calculation method for radio channel providing failure probability is developed for mobile networks while estimation method for signaling channels productivity at network and transport layers is developed for a signaling network. The “Queuing theory in telecommunications” course is updated for students studying Telecommunications at high educational institutions. The Handbook has been published according to the new course program. A system of automatic planning and simulation for telecommunication systems and networks has been developed. Practical results of the Doctor’s Thesis are implemented in SRA, corporative standards of “Ukrtelecom”, ARGUS STC, and in teaching process of ONAT named after A.S. Popov, which is confirmed by appropriate documents.