移动WiMAX视频质量和传输效率

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-11 DOI:10.1109/PIMRC.2011.6139662

Victoria Sgardoni, David Halls, Syed Mohsin Matloob Bokhari, D. Bull, A. Nix

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引用次数: 8

摘要

本文探索并定义了在移动WiMAX单播视频传输中提高单位带宽接收视频质量的规则和跨层参数，同时观察严格的视频QoS。使用详细的MAC/PHY模拟器估计信道容量和带宽。该模拟器支持物理层调制和编码方案(MCS)的链路自适应以及MAC层自动重复请求(ARQ)。定义了一个新的性能指标，PSNR / Hz，用于捕获给定有效带宽下获得的视频PSNR。在3GPP城市微信中，为了提高视频的PSNR和质量，将MCS和MAC层块寿命作为平均信道信噪比的函数共同确定。在低信噪比下，更高级别的QAM对于视频传输是低效的(由于MAC层ARQ过高或数据包错误率高)。结果表明，视频效率提高到100毫秒的块寿命，因为更多地使用ARQ使频谱效率更高的MCS模式得以应用。

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Mobile WiMAX video quality and transmission efficiency

This paper explores rules and defines cross layer parameters that enhance the received video quality per unit bandwidth while observing strict video QoS for unicast video transmission over mobile WiMAX. Channel capacity and goodput are estimated using a detailed MAC/PHY simulator. The simulator supports link adaptation of the PHY layer Modulation and Coding Scheme (MCS) alongside MAC layer Automatic Repeat Request (ARQ). A new performance indicator, PSNR per Hz, is defined to capture the video PSNR attained for a given effective bandwidth. For the 3GPP urban micro channel, MCS and MAC layer block lifetime are jointly determined as a function of average channel SNR in order to enhance video PSNR and goodput. At low SNR higher level QAM is inefficient (as a result of excessive MAC layer ARQ or high packet error rate) for video transfer. Results show that video efficiency improves for block lifetimes up to 100ms, since the greater use of ARQ enables more spectrally efficient MCS modes to be applied.

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来源期刊

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications

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