Gabinet A. Means to increase effeciency for streaming video transmission in the peer-to-peer networks

The thesis is dedicated to solving of the scientific problem of increasing efficiency for streaming video transmission in peer-to-peer networks through the development of approach for optimization of their structures, methods that allow to reduce the traffic volume in networks, to speed up network reconfiguration and to decrease the delay time of video data delivery and to increase the efficiency of reservation and renewing of the lost data. For reducing of traffic in peer-to-peer networks through decreasing of doubling the method of creation of peer-to-peer networks structure with broadcast video data delivery with decentralization of functional subscribers selection is offered. The mathematical model of hierarchical structures of peer-to-peer networks is offered, theoretically justified and investigated. According to the results of experimental investigations of real systems for video information spreading the methodology of forecasting the changes of subscriber amount in network is justified. On its basis the method for proactive selection of functional subscribers in network is offered that allows to reduce the time for system reconfiguration. For providing of data delivery continuity the method of their reservation and re-newing was developed, the method is based on erasures-codes that are being trans-ferred in reserved stream. It is proved that by taking into account the specific of data lost during network reconfiguration the offered method provides less informational redundancy in compare with the existing methods.