可扩展视频在第三代无线网络中的自适应传输.pdfVIP

Network-adaptive Scalable Video Streaming Over 3G Wireless Network Qian Zhang, Wenwu Zhu, and Ya-Qin Zhang Microsoft Research, China 5F, Bejing Sigma Center, No. 49, Zhichun Road Haidian District, Beijing 100080, P. R. China Abstract battery lifetime alone, it can balance the need for high battery Scalable video streaming over wireless link with Quality of lifetime with the need of providing reasonable cell capacity and Service (QoS) is a very challenging task due to the time-varying quality of service. characteristics of wireless channel and limited battery resource in In this paper, we propose an end-to-end architecture that the handheld devices. This paper proposes an end-to-end network- simultaneously controls error correction and transmission power to adaptive architecture for video streaming over 3G wireless network. maintain the desired QoS for scalable video streaming over 3G The proposed architecture not only dynamically estimates the network, based on the measurements of throughput and error rate varying network status on the fly, but also simultaneously performs for 3G network. Note that our scheme is capable of dynamically application-level error control and transmission-level power adapting to the varying wireless network condition and minimizing control to protect the random and fading error occurred across the