Research On P2P Streaming Media Video Distribution Cooperation Node Selection Model

P2P streaming media technology is one of the hot spot in the study of Internet application, and the node selection of cooperation as a key proble m in the P2 P streaming media technology has been widely concerned. However, most current P2 P applications are based on a user node is w illing to provide shared resource of assumptions, but this assumption disre gards node for its own sake is not act according to the given agreement. Re lated studies found that selfish is the nature of P2 P nodes can not be ignored, node selfish beha vior leads to P2 P streaming media netw ork applications appear serious problems, such as, not cooperative behavior and resource allocation injustice problem. These proble ms will be the running qua lity of P2 P streaming media network itself w ith the video service qua lity has a harmful effect. In this background, this paper use the auction theory in economics and Stackelberg game ideas, combining w ith the characteristics of P2 P video streaming media network, video resources auction scheme is proposed.At first, this paper proposes a node selection scheme of cooperation, super node selection mechanism based on reputation. The algorithm is based on the introduction of the concept of credit super node selection mechanism, through the calculation of performance va lue of the node and reputation value, Choose the good performance from high reputation node(long online time, large bandw idth, CPU processing capacity of strong, high qua lity video resources) node as a P2 P video streaming media distribution cooperation node. Through the simulation experiment shows that the super node selection scheme can make the system has good stability.Secondly, according to node selfish behavior, auction algorithm is proposed based on the resources of the Stackelberg game, promote cooperation provide video service node, node to a Shared resource. Through the the oretical ana lysis between P2 P node cooperation situation can become a Nash equilibrium, name ly the P2 P nodes use auction strategy is able to enter the system steady state. Select the effectiveness of the algorithm is verifie d by simulation experiments and confirmed the high reputation node gets more benefits, whic h can make the system to achieve the best utilization rate of resources and promote the cooperation node.