Scheduled and Contention Access Transmission of Partitioned H.264 Video Over WLANs
Scheduled and Contention Access Transmission of Partitioned H.264 Video Over WLANs
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WLAN 上分区 H.264 视频的调度和竞争访问传输
DOI：
10.1109/glocom.2007.408
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
H. Alnuweiri
中科院分区：
文献类型：
--
作者：
Y. P. Fallah;P. Nasiopoulos;H. Alnuweiri
由于 802.11 MAC 层效率低下且信道错误率不断波动，通过 802.11 无线局域网 (WLAN) 支持视频等多媒体应用是一项具有挑战性的任务。因此，必须在应用层和交付层采取具体措施，以实现高效且令人满意的多媒体应用质量。先进的视频压缩技术（例如 H.264）提供了新的数据分区容错功能，允许以不同重要性级别的不同流传输视频数据。有多种可能的方案可将这些流映射到 IEEE 802.1le MAC 的服务。在本文中，我们研究了现有方案并提出了提高视频通信系统性能的新机制。我们建议在 MAC 中使用调度访问方案，并在应用层中聚合数据包，以实现最佳结果。我们使用模拟实验评估我们提出的机制。
Supporting Multimedia applications, such as video, over 802.11 wireless local area networks (WLAN) is a challenging task due to the inefficiency of the 802.11 MAC layer and the constant fluctuations in channel error rates. Therefore, specific measures must be taken in both application and delivery layers in order to achieve efficient and satisfactory quality for multimedia applications. Advanced video compression technologies, such as H.264, provide new data partitioning error resiliency feature that allows delivery of the video data in different streams with different levels of importance. There are several possible schemes for mapping these streams to the services of the IEEE 802.1 le MAC. In this article we examine the existing schemes and propose new mechanisms that improve the performance of the video communications system. We propose to use scheduled access schemes in MAC, along with aggregation of packets in the application layer to achieve the best results. We evaluate our proposed mechanisms using simulation experiments.
DOI：
10.1109/tcsvt.2003.815165
发表时间：
2003-07-01
影响因子：
8.4
作者：
Wiegand, T;Sullivan, GJ;Luthra, A
通讯作者：
Luthra, A