移动网络中HTTP视频流终端数据分析及应用  

Client Side Data Analysis and Application for HTTP Video Streaming in Mobile Networks

作　　者：吴浩[1] 戴旭初[1] 秦晓卫[1] 

机构地区：[1]中国科学技术大学信息学院,合肥230027

出　　处：《无线通信技术》2014年第2期17-23,共7页Wireless Communication Technology

基　　金：国家重点基础研究规划项目(973项目:2013CB329004)

摘　　要：伴随移动通信技术的发展,越来越多的用户选择通过移动网络随时随地观看网络视频,移动视频业务迅速增长。在现有的无线视频传输方式中,由于TCP的可靠性以及易穿透防火墙和网络地址转化等优点,基于TCP的HTTP流逐渐成为网络视频的主流传输方式。另一方面,用户对业务体验需求的上升,也给移动数据的传输带来巨大挑战。该文通过采集和分析HTTP流的终端数据,获到了HTTP流在HSPA+中传输特性及关键参数的特征,分析结果表明其视频块传输速率变化与自回归模型近似,并在此基础上,提出一种视频等级自适应控制算法,能够有效地改善用户体验。With the development of mobile communication technology, video delivery on mobile net- works is constantly gaining popularity. More and more customs are embracing the convenience to watch video through mobile networks at any time in any place. Among all video delivery solutions, HrITP streaming has been widely used for multimedia delivery owing to TCP＇s reliable service and other advantages such as easy traversal through network address translation and firewalls. However, users＂ expectations for better Quality of Experience （QoE） are increasing at the same time and it brings challenges to mobile data transmission system. In this paper, we investigate the transmission performance of HTrP streaming over HSPA ＋, and then an AR model is introduced to predict the variation of segment throughput. Based on the introduced predict model, we propose an adaptive al- gorithm to adjust video quality level, which can obviously improve the user＇s QoE.

关 键 词：HSPA+ HTTP流 自适应流 视频块传输速率 

分 类 号：TN915[电子电信—通信与信息系统]