网络教学平台及P2P视频点播系统的设计与开发

发布时间：2019-01-07 13:57

【摘要】：随着计算机和网络技术的飞速发展,互联网技术也逐渐影响着各个传统行业,特别是在教育与学习的方面,应用互联网进行辅助教学正在世界范围内成为主流趋势。随着MOOC为主的在线教育系统的发展,国内外知名高校相继建设自己的网络教学平台,使得学生可以随时随地完成自己的学习计划。从共享学习资源到课程项目,网络教学的发展,正推动着传统教育方式的变革。基于这样的背景,本文结合高等教育的教学需求,采用互联网思维与技术,设计开发了基于校园网络环境的网络教学平台及其视频点播系统。传统的视频点播系统多采用C/S模式,用户直接向服务器请求服务,因此会受带宽资源、服务器资源的限制,当遭遇大规模并发性访问时,往往会对服务质量产生重大影响,给系统的可用性、可靠性带来严峻的挑战。本文正是针对这一问题,引入了对等网络(Peer toPeer)技术,利用BitTorrent协议,将用户通信的方式由集中的C/S模式改为P2P的方式。在这样的通信方式下,请求视频的节点越多,提供视频的节点也就越多,资源的分享速度也就会越快。论文首先对网络教学平台搭建过程中会涉及到的相关技术进行了细致而深入的调研,包括Blackboard教学平台、Web开发技术、P2P技术、BitTorrent协议、Mycat分布式数据库管理相关技术,为后面的开发、搭建等工作打好技术基础。接着对网络教学平台的功能、性能等方面的需求进行了分析,并在此基础上对网络教学平台的搭建进行了详细设计,包括前端上传模块、视频处理模块、网络教学模块、自动保种模块、Tracker服务器模块以及Mycat数据库管理模块等。最后对系统的各个模块进行了开发、实现与测试,测试结果表明各个模块的性能均达到了预期的效果。
[Abstract]:With the rapid development of computer and network technology, Internet technology is gradually affecting the traditional industries, especially in education and learning, the use of the Internet to assist teaching is becoming the mainstream trend worldwide. With the development of online education system based on MOOC, famous colleges and universities at home and abroad have built their own network teaching platform one after another, so that students can complete their study plan at any time and anywhere. From sharing learning resources to curriculum projects, the development of network teaching is promoting the transformation of traditional education methods. Based on this background, this paper combines the teaching needs of higher education, adopts the Internet thinking and technology, designs and develops the web-based teaching platform and its video-on-demand system based on the campus network environment. The traditional VOD system mostly uses C / S mode, the user directly requests the service to the server, therefore will be limited by the bandwidth resources, the server resources, when encounters the large-scale concurrent access, often will have the significant influence to the service quality. The availability and reliability of the system pose a serious challenge. In order to solve this problem, this paper introduces the peer-to-peer network (Peer toPeer) technology and uses BitTorrent protocol to change the mode of user communication from centralized C / S mode to P2P mode. In this communication mode, the more nodes request video, the more nodes provide video, and the faster the speed of resource sharing. First of all, the paper makes a detailed and in-depth investigation on the related technologies involved in the construction of the network teaching platform, including Blackboard teaching platform, Web development technology, P2P technology, BitTorrent protocol, Mycat distributed database management technology. For the subsequent development, construction and other work to lay a good technical foundation. Then the function, performance and other requirements of the network teaching platform are analyzed, and on this basis, the construction of the network teaching platform is designed in detail, including front-end upload module, video processing module, network teaching module. Automatic conservation module, Tracker server module and Mycat database management module. Finally, each module of the system is developed, implemented and tested. The test results show that the performance of each module has reached the desired results.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP311.52;TN948.64

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