无线接入和视频应用的日益普及使无线视频传输成为新的研究热点。随着研究的深入，跨层优化和不平等保护的思想逐渐为大多数研究所采纳。基于IEEE 802.11e协议研究无线视频传输质量的改善方法，提出一种综合考虑视频帧优先级和相对排队延时、适用于优先级数目有限的任何编码算法的视频帧调度算法。仿真实验结果表明，提出的算法具有远高于标准EDCA及其已有改进方案的平均峰值信噪比。

With the popularity of wireless access and video applications, wireless video transmission is bringing more attention. In most papers, the ideas of cross-layer optimization and unequal protection were adopted. To improve transmission quality of wireless video streams, a novel scheduling algorithm which integrates priorities of video frame with “relative queuing delay” and is suitable for any coding algorithm with limited priorities under IEEE 802.11e is proposed in this paper. Simulation results show that average peak SNR of proposed algorithm is much higher than those of EDCA and existing improving scheme.