Self-orienting wireless multimedia sensor networks for occlusion-free viewpoints
Self-orienting wireless multimedia sensor networks for occlusion-free viewpoints
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DOI：
10.1016/j.comnet.2008.05.014
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发表时间：
2008-09-17
影响因子：
5.6
通讯作者：
Wang, Wenye
中科院分区：
文献类型：
--
作者：
Tezcan, Nurcan;Wang, Wenye
无线多媒体传感器网络（WMSN）是由大量紧凑的计算设备组成的，这些设备可以捕获多媒体内容，如视频和音频，并通过无线信道进行通信。WMSN的效率在很大程度上取决于其各个传感器单元在现场的正确方向（即视图），本文研究了WMSN中的自定向问题，即为所有多媒体传感器找到最有利的方向，以最大化多媒体覆盖。我们提出了一种新的算法来确定节点的多媒体覆盖范围，并找到传感器方向，使传感领域中的遮挡和重叠区域的负面影响最小化。我们的方法使多媒体传感器节点能够计算其方向覆盖，从而实现高效且自配置的传感器方向计算。仿真结果表明，无遮挡视点方法显著提高了多媒体图像的覆盖率。自导向方法采用分布式算法的形式设计，适合在实际系统中部署。(C) 2008 Elsevier B.V.版权所有
Wireless multimedia sensor networks (WMSN) are formations of a large number of compact form-factor computing devices that can capture multimedia content, such as video and audio, and communicate them over wireless channels. The efficiency of a WMSN heavily depends on the correct orientation (i.e., view) of its individual sensory units in the field, In this paper, we study the problem of self-orientation in WMSN, that is finding the most beneficial orientation for all multimedia sensors to maximize multimedia coverage. We propose a new algorithm to determine a node's multimedia coverage and find the sensor orientation that minimizes the negative effect of occlusions and overlapping regions in the sensing field. Our approach enables multimedia sensor nodes to compute their directional coverage leading to an efficient and self-configurable sensor orientation calculation. By using simulations, we show that the occlusion-free viewpoint approach increases the multimedia coverage significantly. The self-orientation methodology is designed in the form of a distributed algorithm, making it a suitable candidate for deployment in practical systems. (C) 2008 Elsevier B.V. All rights reserved.