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The Design and Implementation of the VOD System Based on P2P Streaming Media

Author: MaLiXin
Tutor: WangHua
School: Shandong University
Course: Software Engineering
Keywords: P2P VOD Application Layer Multicast Message passing mechanism NAT traversal Cache policy
CLC: TN948.64
Type: Master's thesis
Year: 2008
Downloads: 293
Quote: 1
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Abstract


The subject in the study of a variety of streaming media data transmission and application layer multicast technology based on the background of a modern university campus network live online teaching system will combine P2P, streaming media , based P2P streaming media transmission VOD systems . Mainly include multicast tree construction algorithm , the system transmission scheduling policy , the message transmission mechanism , NAT firewall traversal and other content . This article addresses the following key issues . An application layer multicast protocol selection. Transmission strategy of taking into account the entire system , the proposed adaptive distributed multicast tree based on hierarchical cluster build agreement NICE . System message passing mechanism . P2P overlay multicast tree messages are transmitted in the form of UDP packets , packets in order to improve the efficiency of the multicast tree transmission , the system design of a separate set of packet header format for loading to the packet when the node receives the streaming data acquisition module collected data , it will according to this packet format is data packets for processing . Firewall traversal 3.NAT . This system combines the tunnel through the technology , the use of message mechanism tunnel through the holes in the transport stream media data between computers processing of all messages transmitted using UDP . Forwarded by the convergence point host as a NAT message Server nodes exist in the private network as NAT traversal , the node will be the convergence point of the host ( Server ) carried the message forwarding , ultimately determine the address of the node as you want to transfer data and port number. 4 system . Including client login and logout , the acquisition of the client list , client nodes joining and leaving , the client-side caching strategies , resource locator to find a stream receiver and the realization of the flow transmitter . The system uses Java, XML and other language development, cross-platform system strong . In addition , the proposed P2P-based VOD system , when demand more users , transmission speed but the faster the user node , so in theory, on-demand download unlimited increase without regard to the backbone network bandwidth and server problems . This system not only technically easy to implement and take full advantage of the user idle uplink channel , thus completely solve the problem of load on the backbone network and server overload .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > TV > TV and television equipment > Television Center Management System > Video on Demand System
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