面向电信运营商专用视频内容分发系统的性能评估和优化

发布时间：2018-01-24 13:52

本文关键词： 智能电视内容分发成本控制性能评估　出处：《复旦大学》2014年硕士论文　论文类型：学位论文

【摘要】：智能化产业发展迅速。继智能手机和平板电脑的普及后,智能电视开始蓬勃发展。电视最初的核心功能是提供视频直播服务,基于这个特性和用户已养成的使用习惯,视频业务仍将是智能电视的核心业务之一。为保证服务质量,智能电视视频业务一般采用内容分发网络进行视频分发。相比普通内容分发系统,电信运营商专用视频内容分发系统不需要租赁带宽且可以与底层网络进行更紧密地耦合,具有成本和性能的双重优势。因此电信运营商专用视频内容分发系统可能是未来承担智能电视视频分发的主力。但随着智能电视的发展,它所依赖的内容分发系统需要不断扩大,系统部署和运营成本急剧上升,严重制约着系统的进一步发展。因此针对电信运营商专用视频内容分发系统成本控制的研究具有重大的实际意义。本文从这一实际需求出发,从成本控制角度对电信运营商专用视频内容分发系统进行了性能评估和优化。为此,我们提出了一个基于统计的内容分发评估方案,该方案首先分析了电信运营商专用视频内容分发系统的实际情况,包括真实网络架构和用户行为等；然后提出了运营商真正关心的性能指标和相关参数；随后建立了内容分发策略理论模型,定性地描述了性能指标和相关参数间的关系；构建了一个大规模视频内容分发仿真系统,用真实网络环境和用户行为激励仿真系统,进行大量仿真实验。实验结果表明了性能指标和相关参数间的定量关系,得到了使系统成本最小的分发策略参数设置,为电信运营商选择分发策略和设置参数提供了理论依据。
[Abstract]:The intelligent industry is developing rapidly. After the popularity of smart phones and tablets, smart TV has begun to flourish. The core function of television was to provide live video service. Based on this feature and the usage habits developed by users, video service will still be one of the core services of smart TV, in order to ensure the quality of service. Intelligent TV video service generally uses content distribution network for video distribution, compared with common content distribution system. Private video content distribution system for telecom operators does not need to lease bandwidth and can be more tightly coupled with the underlying network. Because of the dual advantages of cost and performance, the dedicated video content distribution system for telecom operators may be the main force in the future. However, with the development of smart TV. The content distribution system on which it relies needs to be expanded and the cost of system deployment and operation has risen dramatically. The further development of the system is seriously restricted. Therefore, it is of great practical significance to study the cost control of dedicated video content distribution system for telecom operators. This paper evaluates and optimizes the performance of dedicated video content distribution system for telecom operators from the point of view of cost control. For this purpose, we propose a statistical content distribution evaluation scheme. The scheme firstly analyzes the actual situation of the private video content distribution system of telecom operators, including the real network architecture and user behavior. Then put forward the real concern of the operator performance indicators and related parameters; Then the content distribution strategy theory model is established, and the relationship between the performance index and related parameters is described qualitatively. A large scale video content distribution simulation system is constructed. A large number of simulation experiments are carried out using real network environment and user behavior incentive simulation system. The experimental results show the quantitative relationship between performance indicators and related parameters. The system cost minimized distribution policy parameter setting is obtained, which provides a theoretical basis for telecom operators to select distribution policy and set parameters.
【学位授予单位】：复旦大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：F626;TP391.9

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