Cross-layer co-exploration of exploiting error resilience for video over wireless applications
Cross-layer co-exploration of exploiting error resilience for video over wireless applications
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DOI：
10.1109/estmed.2008.4696987
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发表时间：
2008-12
期刊：
影响因子：
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通讯作者：
A. Djahromi;Minyoung Kim;N. Dutt;A. Eltawil;F. Kurdahi
中科院分区：
文献类型：
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作者：
A. Djahromi;Minyoung Kim;N. Dutt;A. Eltawil;F. Kurdahi
在本文中，我们提出了一个跨层的算法/架构共同探索无线多媒体系统，以协调子层优化器之间的相互作用，提高能源/QoS/可靠性。通过利用无线多媒体系统中固有的冗余，我们产生了一个扩展的设计空间，在传统的，特定于层的方法。具体而言，我们控制在应用层的错误弹性编码器，以提供在物理层（WCDMA）的架构探索的意识，允许新的设计点，通过积极的电压缩放具有较低的功耗。在尝试减少能量消耗的同时，容错技术分别补偿由于积极的电压缩放和有损传输而导致的硬件和网络错误的影响。我们的实验上H.263视频在WCDMA通信系统中表明，共同探索扩大了可行的设计空间，这导致在34%的H.263编码器显着的功耗节省超过20%，在WCDMA调制解调器。
In this paper, we propose a cross-layer algorithm/architecture co-exploration for wireless multimedia systems to coordinate interactions among sub-layer optimizers for improvements in energy/QoS/reliability. By exploiting the inherent redundancy in wireless multimedia systems, we generate an expanded design space over traditional, layer-specific approaches. Specifically, we control the error resilient encoder at the application layer to provide awareness of architectural exploration at the physical layer (WCDMA) allowing new design points with lower power consumption via aggressive voltage scaling. While trying to reduce energy consumption, the fault tolerant technique compensates the effect of the hardware and network errors due to aggressive voltage scaling and lossy transmission, respectively. Our experiments on H.263 video over WCDMA communication system demonstrate that co-exploration enlarges the feasible design space which results in significant power savings of 34% in the H.263 encoder more than 20% in the WCDMA modem.