帧大小对无线图像传感器网络能耗的影响

D. G. Costa, L. A. Guedes, F. Vasques, P. Portugal
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引用次数: 16

摘要

由支持摄像头的源节点组成的无线传感器网络可以提供感兴趣区域的视觉信息,潜在地丰富监控应用。虽然很少的字节可以表示标量数据,但即使是低分辨率的静态图像也可能需要数千字节,这就把数据碎片变成了一个相关的设计问题。为了实现无线图像传感器网络的节能,近年来提出了不同的优化方法。然而,在大多数情况下,图像碎片对所采用的MAC技术的影响被忽略了。在这项工作中,我们研究了帧大小对无线传感器网络图像传输的影响,将最大帧大小、有效载荷和帧错误率影响联系起来。此外,我们还讨论了传输基于dwt编码图像的不同方法,以及在帧报头中插入特定于应用程序的信息的影响。我们相信我们的讨论可以促进无线图像传感器网络设计的进步。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of frame size on energy consumption in wireless image sensor networks
Wireless sensor networks composed of camera-enabled source nodes can provide visual information of an area of interest, potentially enriching monitoring applications. While few bytes can represent scalar data, even low-resolution still images may require thousand of bytes, turning data fragmentation into a relevant design issue. Different optimization approaches have been proposed in recent years to achieve energy saving in wireless image sensor networks. However, the impact of image fragmentation upon the adopted MAC technology has been neglected in most cases. In this work we investigate the effect of frame size on image transmissions over wireless sensor networks, linking the maximum frame size, the useful payload and the frame error rate effects. Additionally, we discuss different approaches for transmissions of DWT-based encoded images and the impact of inserting application-specific information into the frame header. We believe that our discussions can contribute to the advance of the design of wireless image sensor networks.
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