基于特性筛选的网络视频纳什优化机制研究  

Research on Optimization Mechanism of Network Video Based on Feature Selection for Nash

作　　者：李如平[1,2] 王勇[3] 徐珍玉 

机构地区：[1]合肥工业大学计算机与信息学院,合肥230009 [2]安徽工商职业学院电子信息系,合肥231131 [3]合肥工业大学机械与汽车工程学院,合肥230009 [4]农业部农业物联网技术集成与应用重点实验室,合肥230088

出　　处：《计算机科学与探索》2016年第5期657-666,共10页Journal of Frontiers of Computer Science and Technology

基　　金：国家自然科学基金Nos.40876052;60543002;国家科技部创新基金项目No.11C26213402042;安徽省高校自然科学研究重点项目Nos.KJ2015A389;KJ2015A450;KJ2016A081;安徽省对外科技合作计划项目No.1403062028;安徽省高校学科(专业)拔尖人才学术资助重点项目No.gxbj ZD2016094~~

摘　　要：为解决异构网络环境下网络视频传输中难以实现均衡传输,以及视频质量难以满足用户主观需求等难题,提出了基于特性筛选及异构网络带宽选择的网络视频数据纳什均衡优化机制。首先通过对当前用户视频数据进行基于参数的特性筛选,并通过定义裁决评价矩阵来计算参数权值矢量,从而对网络状况进行动态评估,以便选择适合网络进行传输;然后采用纳什均衡优化机制,构建效益函数并采取迭代算法获取纳什均衡解,从而得到最佳带宽。仿真实验表明,与BRA-PMEM(bandwidth resource allocation mechanism in pure market economy model)机制相比,新机制在用户视频特性及网络处于异构状态时,更能有效降低用户视频体验误差程度,改善用户PSNR(peak signal to noise ratio),提高网络的利用效率。In order to solve the problems such as difficult to achieve balance transmission, and the video quality is dif- ficult to meet the needs of user in network video transmission under the conditions of heterogeneous network environment, this paper proposes the Nash equilibrium optimization mechanism of network video data based on feature selection and heterogeneous network bandwidth selection. Firstly, the dynamic evaluation of the network state is conducted to select the appropriate network for transmission by defining the evaluation matrix to calculate the parameters weight vector and selecting the parameters based on the current user video data. Then Nash equilibrium solution is obtained by using the Nash equilibrium optimization mechanism to construct the benefit function and iterative algorithm. The simulation results show that the proposed mechanism can effectively reduce the error level of user＇s video experience and improve the user PSNR （peak signal to noise ratio）, as well as increasing the efficiency of the network when the user＇svideo characteristic and network are heterogeneous compared with the BRA-PMEM （bandwidth resource allocation mechanism in pure market economy model）.

关 键 词：异构网络 视频特性 纳什均衡 裁决评价矩阵 效益函数 最佳分配带宽 

分 类 号：TN929.5[电子电信—通信与信息系统]