基于相对排队延时的无线视频传输研究

Relative queuing delay based wireless video transmission

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 802.11 e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 802.11 e 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.