MPEG-4视频无线传输的自适应QoS控制

Adaptive QoS Control for MPEG-4 Video Communication over Wireless Channels

自适应 Qo S控制机制由优化模式选择和固定时延的混合自动请求重传组成 ,优化模式选择在压缩层提供 Qo S支持 ,固定时延的混合自动请求重传在链路层提供 Qo S支持。仿真结果显示给出的自适应Qo S控制对 MPEG- 4视频在动态的无线信道上传输达到了满意的质量 。

The proposed adaptive QoS control consists of optimal mode selection and delay-constrained hybrid automatic repeat request (ARQ). The optimal mode selection is employed to provide QoS support on the compression layer while delay-constrained hybrid ARQ is used to provide QoS support on the link layer. Simulation results show that the proposed adaptive QoS control achieves satisfactory quality for MPEG-4 video under dynamically changing wireless channel conditions and utilizes network resources efficiently.