Research Of Streaming Data Scheduling Algorithm Base On P2P Network

With the rapid development of the Internet and the increase of users, the quality of network video, audio and other increasingly high demand for the application of streaming media on the Internet is more and more widely. But the traditional C/S server mode increasingly unable to meet the needs of users, and a higher demand on the server. In order to further improve the quality of video network, reducing delay the start time of the video, audio, data and meet the timeliness requirements of the customers, P2P (peer-to-peer) streaming has become the the irreplaceable trend.P2P peer-to-peer network in the streaming media to reduce the traditional server load pressure, each node in the network topology that can be used as a server-side and can be used as a client, the client node makes a request meet the conditions of node either as a server to other nodes to provide services, but also can be used as a client node makes a request. Taking into account network latency, network bandwidth, the start-up delay, network data transmission quality assurance, among other factors, can give priority to higher network bandwidth Nodes around node as a server node as a server providing services request mode, reducing the total the pressure on the server, but also a timely manner to meet the needs of the client. Streaming media transmission process based on peer-to-peer network topology system, the ability to accept service node uneven, the increase in exit node network is free to all network topology changes, file selection, quality of service guarantee QoS (Quality of Service), data scheduling policy choice and so on have become critical factors, especially the choice of data scheduling policy plays a key role in the transmission speed, the quality of audio and video transmission.Based on the above background, this paper conducted in-depth research data scheduling algorithm for P2P streaming video. The main research work include the following:(1) First introduced streaming media, P2P streaming media theoretical basis, the system structure, given several network topology model;followed by the key in the P2P streaming media transmission technology highlights several P2P-based data Overwrite mode and elaborate on the advantages and disadvantages of the various data overwrite mode.(2) based on feedback adaptive data scheduling algorithm the FBSA (Feedback Based the Scheduling Algorithm), the algorithm for streaming video image group GOP (Group of Picture) a block of data to set the serial number of index scheduling, the adaptive adjustment of the actual state of the streaming media data transmission. Algorithm Background, ideas, processes and implementation of the code is described in detail.(3) comparative analysis can be found through many experiments with the prevalence of P2P streaming media scheduling algorithm FBSA algorithm in dynamic network topology greatly reduces the server load balancing, improved audio and video playback continuity and cache data and the system throughput has been greatly improved, and the ability to make full use of the bandwidth of the node. Start delay time system performance is maintained at a steady level, and are not optimal.