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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, more and more users choose to watch online videos anytime, anywhere through the mobile network, and the mobile video business is rapidly growing. Among the existing wireless video transmission methods, due to the reliability of TCP and the advantages of easily penetrating firewalls and network address translation, the HTTP streaming based on TCP has gradually become the mainstream transmission mode of network video. On the other hand, the increasing demand of users for business experience also posed a great challenge to the transmission of mobile data. By collecting and analyzing the terminal data of HTTP stream, the characteristic of HTTP stream transmission in HSPA + and the key parameters are obtained. The analysis results show that the change of video block transmission rate is similar to that of autoregressive model. Based on this, Video level adaptive control algorithm, can effectively improve the user experience.