基于SIP的P2P实时视频直播系统

发布时间：2018-11-22 08:02

【摘要】：互联网的快速发展使得网络视频服务得到了广泛的应用。为了使用户得到更好的体验,同时使服务提供商能够尽量节省带宽资源,人们提出了许多新技术。P2P就是其中极具发展前景的一项技术。P2P技术打破了传统网络视频服务系统的客户端/服务器(Client/Server, C/S)模式,有效地解决了C/S模式下的带宽瓶颈问题。将P2P技术应用于视频直播服务的关键在于P2P网络的构建与维护,以及节点之间的资源共享问题。论文首先介绍了P2P网络结构的分类及其优缺点,然后针对视频直播服务的高动态性和高实时性的特点,对非结构化的P2P网络结构进行了分析和研究。同时,为了弥补该结构缺乏中心管理的缺点,论文将SIP协议与P2P技术结合,通过SIP协议来实现P2P网络中节点的控制和管理功能。论文接着详细分析了非结构化P2P网络中的两个关键技术：覆盖网络管理和数据块调度策略,它们同时也是影响P2P网络性能的重要因素。在此基础之上,论文设计了一种基于SIP的P2P实时视频直播系统的框架。论文还重点研究了直播服务器与普通节点的设计,并分别说明了其中各个模块的工作原理。最后,论文对基于SIP的P2P实时视频直播系统进行了功能测试和性能测试。测试结果表明系统能够正确地完成覆盖网络管理和数据调度功能,并且在网络搅动时能够做出快速的调整以减少视频直播时延。
[Abstract]:With the rapid development of the Internet, network video services have been widely used. In order to give users a better experience and to enable service providers to save bandwidth resources as much as possible, Many new technologies have been put forward. P2P is one of the most promising technologies. P2P has broken the Client/Server, C / S mode of traditional network video service system. The problem of bandwidth bottleneck in C / S mode is solved effectively. The construction and maintenance of P2P network and the sharing of resources among nodes are the key to the application of P2P technology to live video service. Firstly, this paper introduces the classification of P2P network structure and its advantages and disadvantages, and then analyzes and studies the unstructured P2P network structure in view of the high dynamic and real-time characteristics of live video service. At the same time, in order to make up for the lack of central management, this paper combines SIP protocol with P2P technology, and realizes the control and management function of P2P nodes through SIP protocol. Then, two key technologies in unstructured P2P networks, overlay network management and data block scheduling, are analyzed in detail, which are also important factors affecting the performance of P2P networks. On this basis, this paper designs a P2P real-time video streaming system framework based on SIP. The paper also focuses on the design of live server and common node, and explains the working principle of each module. Finally, the function and performance of P2P real-time video streaming system based on SIP are tested. The test results show that the system can correctly complete the overlay network management and data scheduling functions, and can make rapid adjustments to reduce the video broadcast delay while the network is agitating.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN919.81

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