Abstract: In this paper an improved dynamic queue assignment algorithm based on the ideas of cross-layer optimization and unequal protection under IEEE 802.11e was proposed. In this algorithm, queue AC[1] and AC[0] were utilized to transmit video frame. Queue priorities, which were utilized to map with video frame priorities, were calculated according to queue status. The proposed algorithm assigned a queue for a video frame according to the priority of the frame and the congestion conditions of different queues. The simulation results show that video distortion can be greatly decreased by using the proposed algorithm.

Key words: wireless video transmission, IEEE 802.11e, queue priority, unequal protection

摘要： 基于跨层优化和不平等保护的思想，提出一种新的IEEE 802.11e动态队列分派算法。利用AC［1］和AC［0］队列优化视频传输；根据队列状态动态计算队列优先级，并将它与视频帧优先级相匹配；综合考虑视频帧的优先级、不同队列的拥塞状况为视频帧动态分派队列。仿真实验表明，该算法能有效降低视频的传输失真。

关键词: 无线视频传输, IEEE 802.11e, 队列优先级, 不平等保护