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Research on Campus Network Streaming On-demand System Based on Peer to Peer

Author: SunYaJuan
Tutor: GuoYuDong
School: PLA Information Engineering University
Course: Computer technology
Keywords: Streaming P2P HD video-on-demand Adaptive sliding window
CLC: TN919.8
Type: Master's thesis
Year: 2009
Downloads: 58
Quote: 0
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Abstract


Surgical high-definition video-on-demand server and bandwidth bottlenecks, propose solutions based on P2P streaming media on-demand system, and BitTorrent based on the successful transformation of a P2P streaming transmission system. First of all, from the current problems in the surgical teaching in Zhengzhou Animal Husbandry Engineering, College of Veterinary Medicine, an idea to make a network of high-definition video teaching; Second, it analyzes the structure and operating principle of the existing C / S architecture streaming media system , pointed out the shortcomings of the existing streaming media for high-definition video-on-demand, put forward the idea of ??P2P technology used in streaming media on-demand system; Again, based on adaptive sliding window P2P streaming media transmission mechanism to solve the traditional streaming media single point of failure and server, bandwidth bottleneck problem of streaming media, making the campus network capable of supporting high-definition video on demand, but also has a good system robustness and scalability; Finally, the design and implementation of the campus network streaming media system to verify the mentioned herein feasibility and reality, and analyze its performance. BitTorrent-based P2P streaming media on-demand system uses a playing while downloading mode, download the video file to be fragmented, multi-point transmission, the user node involved both as consumers of services, but also for service providers, thereby eliminating the bottleneck in the system of traditional streaming multimedia. Video file transfer process, slice request strategy is the core of the system. BitTorrent is dedicated to file sharing and downloading, real-time requirements, not suited to streaming media player; system into the sliding window in order to achieve the playback of streaming media, effective regulatory fragmentation request order to ensure that the playback order of the data sexual arrive. In-depth analysis on the basis of the system, in order to further reduce playback delay, the download process, the stars sheet Request and the node selection strategy to optimize the P2P transmission mechanism to improve the bandwidth utilization, to avoid wasted bandwidth. To further expand on the sliding window at the same time, under the busy condition of the network in real time to adjust the size of the sliding window, to improve the load on the network, to improve the performance of the system. Final in the existing network conditions to meet the needs of multi-user high-definition video-on-demand. The experimental test paper method is relatively simple, but the results can intuitively and accurately reflect the situation of the client stream data receiving, confirming the feasibility of the system. Experiments show that the integration of P2P technology to stream media to optimize system performance, reduce the server-side I / O pressure and network bandwidth pressure. The improved system is easy to deploy, highly scalable support the number of concurrent users is greatly increased. In the case of no additional hardware investment to improve the playback quality, expanding the size of the network teaching, improve teaching quality, has a certain practical significance.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication
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