An unequal error protection mechanism for video streaming over IEEE 802.11e WLANs

被引：15

作者：

Lin, Cheng-Han ^{[1
]}

Wang, Yu-Chi ^{[2
]}

Shieh, Ce-Kuen ^{[2
]}

Hwang, Wen-Shyang ^{[1
]}

机构：

[1] Natl Kaohsiung Univ Appl Sci, Dept Elect Engn, Kaohsiung 807, Taiwan

[2] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 701, Taiwan

来源：

COMPUTER NETWORKS | 2012年 / 56卷 / 11期

关键词：

UEP; IEEE; 802.11e; Video streaming; WLAN; SCALABLE VIDEO; TRANSMISSION;

D O I：

10.1016/j.comnet.2012.04.004

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

A Cross-Layer Mapping Unequal Error Protection (CLM-UEP) mechanism is proposed for video streaming over IEEE 802.11e wireless networks. In the proposed approach, the transmitted video frames are assigned a different number of redundant packets in accordance with their video coding significance. An adaptive cross-layer mapping algorithm is then applied in the Media Access Control (MAC) layer to map the video and redundant packets to appropriate Access Category (AC) queues based on their coding significance and the network load. The numerical results show that the UEP mechanism provides an effective protection against wireless transmission losses. Moreover, the CLM algorithm maximizes the utilization efficiency of the AC queues and minimizes network congestion. As a result, a significant improvement is obtained in both the Playable Frame Ratio (PFR) and the peak signal-to-noise ratio of the transmitted video. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2590 / 2599

页数：10

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