混合结构视频网格服务能力与系统稳定性研究

项目名称： 混合结构视频网格服务能力与系统稳定性研究

项目编号： No.61262016

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 赵宏

作者单位： 兰州理工大学

项目金额： 45万元

中文摘要： 混合结构视频网格利用客户端主机资源为其他用户提供视频服务，缩短了视频数据流的传输路径，扩展了系统结构，增强了系统的服务能力，适合在西部欠发达地区推广应用。但是，由于客户端主机性能差异较大且经常随意加入或者退出系统，给系统服务能力计算和稳定性的判定带来很大的困难。本项目借鉴控制领域对复杂系统分析的方法，建立混合结构视频网格模型。通过对混合结构视频网格动态运行的微观仿真，以定量形式对系统服务能力和稳定性问题进行深入研究，得到系统服务能力和稳定性随在线用户数量、影片热度、客户端服务贡献量、节点失效率等参数变化而改变的规律，并结合试验平台和实际运行系统的校正，提出计算混合结构视频网格服务能力和系统状态稳定性的数学模型。在此基础上，对系统中的资源调度策略与节点数量和地点部署进行优化，以提高系统服务能力。本项目的研究对运行在互联网平台之上，资源需求高，实时性要求强的复杂系统的研究提供了一种新的思路。

中文关键词： 视频网格；建模与仿真；系统服务能力；系统稳定性；系统优化

英文摘要： The video grid with hybrid architecture is suited on the western region of China where lacking development, because it provides video services using client resources so as to the path of video data streaming was shortened and the architecture was expanded and the capacity was enhanced. However, it is too hard to calculate the system service capacity and to determine the system stability for these clients have large diversity performance and random actions of joining or exiting the system. The model of video grid with hybrid architecture will be established in the project by referring the method for analysing the complex system used in control subject. The service capacity and the system stability of the video grid with hybrid architecture will be investigated quantificationally through its dynamic running processes is simulated in microcosmic form. The variational rules of the service capacity and system stability will be gotten following the parameters change like on-line user quantity, film hot degree, service ratio of client, failure ratio of node, et al. Therefore, the mathematic model will be brought to calculate the system service capacity and to determine the system stability for the video grid with hybrid architecture, after the model was revised through the experimental platform and real system of the v

英文关键词： Video grid；Modeling and simulating；System service capacity；System stability；System optimization