计算机科学 ›› 2019, Vol. 46 ›› Issue (3): 103-107.doi: 10.11896/j.issn.1002-137X.2019.03.014
许精策1,2,3,梁冰1,2,3,李梦楠1,2,3,纪雯1,3,陈益强1,2,3
XU Jing-ce1,2,3,LIANG Bing1,2,3,LI Meng-nan1,2,3,JI Wen1,3,CHEN Yi-qiang1,2,3
摘要: 近年来,4G和5G网络的出现大大提高了移动设备数据传输的带宽,同时视频播放设备的性能也不断提高,使得用户对视频流媒体质量的要求不断提升。因此,提升移动视频传输系统的效益变得越来越重要。文中从用户偏好的角度出发,分析多内容移动视频传输系统中用户偏好对系统效益的影响,同时考虑流量价格对用户效益的影响,建立了基于用户偏好的用户效益模型,将多内容移动视频传输系统的效益优化问题转化为加权用户总效益的优化问题。考虑到拥有不同偏好的用户对用户总效益的影响不同,文中提出了一种基于偏好-码率比的用户权重选择方法,以此来选取当前用户偏好下的最优权重。文中通过求解最优加权用户总效益优化问题,得到了当前用户偏好下的最优视频传输码率。实验结果表明,所提方法相比现有效益优化方法提升了5%~10%的系统总效益。
中图分类号:
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