Network-Adaptive Image and Video Transmission in Camera-Based Wireless Sensor Networks
Network-Adaptive Image and Video Transmission in Camera-Based Wireless Sensor Networks
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DOI：
10.1109/icdsc.2007.4357542
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发表时间：
2007-10
期刊：
影响因子：
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通讯作者：
Y. Charfi;N. Wakamiya;M. Murata
中科院分区：
文献类型：
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作者：
Y. Charfi;N. Wakamiya;M. Murata
我们研究基于摄像头的无线传感器网络 (WSN) 中的图像和视频传输。我们的目标是设计一种机制，找到传输策略，最大限度地提高基站传输数据的预期重建质量，同时有效利用无线传感器网络的有限资源。我们的方法基于质量可扩展编码和多路径传输。与传统方法不同，无论数据在目的地的重要性如何，数据都通过路径发送，我们提出了一种网络自适应传输机制，将源比特流分解为不同重要性的段，并保留最可靠的路径来传输具有最高重要性的段。此外，我们使用具有不同强度的纠删码的不等段丢失保护来最大化目的地的预期质量，并提出一种快速算法来找到近乎最佳的传输策略。我们还使用测试视频序列提供了仿真结果，表明所提出的传输机制能够适应基于摄像头的无线传感器网络的时间和空间变化条件。
We investigate image and video transmission in camera-based wireless sensor networks (WSNs). Our objective is to design a mechanism that finds the transmission strategies that maximize the expected reconstruction quality of the transmitted data at the base station while making efficient use of the limited resources of the WSN. Our approach is based on quality-scalable coding and multipath transmission. Unlike conventional approaches where data is sent over the paths regardless of its importance at the destination, we propose a network-adaptive transmission mechanism that decomposes the source bitstream into segments of unequal importance and reserves the most reliable paths to transmit the segments with the highest importance. Moreover, we use unequal segment loss protection with erasure codes of different strengths to maximize the expected quality at the destination and propose a fast algorithm that finds nearly optimal transmission strategies. We also present simulation results using a test video sequence that show that the proposed transmission mechanism provides adaptability to the time and space varying conditions of camera-based wireless sensor networks.