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SPM: split piecewise mapping for high quality wireless video delivery

机译:SPM:分段分段映射,可提供高质量的无线视频

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摘要

Multiple prioritised access category (AC) queues and virtual collision handling among them are the main mechanism of the IEEE 802.11e EDCA for multimedia service differentiation. However, the AC for video (ACVI) is characteristic of FIFO, and thus its performance is limited. For further performance enhancement, differentiation among video packets can help. This study presents a novel cross-layer design combining the error propagation length (EPL) scheme in the application layer allowing each video frame in a group of pictures to have its own importance level, and our proposed split piecewise mapping (SPM) algorithm in the MAC layer offering a corresponding mapping probability function for each importance level of video packets among the AC queues. The results show that the proposed EPL+SPM design outperforms the existing ones, with largest achieved gains as high as 2.8 dB over I/P+PM, 4.1 dB over I/P+AM and 7.4 dB over EDCA.
机译:多个优先访问类别(AC)队列和其中的虚拟冲突处理是IEEE 802.11e EDCA区分多媒体服务的主要机制。但是,视频交流(ACVI)是FIFO的特征,因此其性能受到限制。为了进一步提高性能,可以在视频数据包之间进行区分。这项研究提出了一种新颖的跨层设计,该设计结合了应用层中的错误传播长度(EPL)方案,该方案允许一组图片中的每个视频帧都有其自己的重要性级别,并在该应用中提出了拆分分段映射(SPM)算法MAC层为AC队列中的视频数据包的每个重要级别提供了对应的映射概率函数。结果表明,所提出的EPL + SPM设计优于现有设计,其最大增益比I / P + PM高2.8 dB,比I / P + AM高4.1 dB,比EDCA高7.4 dB。

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