Energy efficient and perceived QoS aware video routing over Wireless Multimedia Sensor Networks
Energy efficient and perceived QoS aware video routing over Wireless Multimedia Sensor Networks
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DOI：
10.1016/j.adhoc.2010.09.001
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发表时间：
2011-06-01
期刊：
影响因子：
4.8
通讯作者：
Kotsopoulos, Stavros
中科院分区：
文献类型：
--
作者：
Kandris, Dionisis;Tsagkaropoulos, Michail;Kotsopoulos, Stavros
无线传感器网络（WSNs）具有越来越多的基于多媒体的应用。在这些类型的应用中，网络节点应当理想地最大化QoS并且最小化视频通信中的能量消耗。本文提出了一种新的高效视频通信的双重方案PEMuR，该方案的目标是在节能的同时实现高QoS。为了实现其目标，PEMuR提出了能量感知分层路由协议与智能视频分组调度算法的组合使用。所采用的路由协议使得能够选择能量效率最高的路由路径，根据节点的能量剩余来管理网络负载，并且通过所提出的使用能量阈值来防止无用的数据传输。通过这种方式，实现了出色的能效水平。此外，所提出的分组调度算法使得能够以最小可能的失真增加来降低视频传输速率。为了做到这一点，它利用了分析失真预测模型，该模型可以精确地预测由于任何错误模式而导致的视频失真。因此，该算法可以通过在较不重要的分组传输之前选择性地丢弃它们来科普有限的可用信道带宽。仿真结果证明了该方法的有效性。(C)2010爱思唯尔有限公司版权所有。
Wireless Sensor Networks (WSNs) have an ever increasing variety of multimedia based applications. In these types of applications, network nodes should ideally maximize QoS and minimize energy expenditures in video communication. This article presents PEMuR, a novel dual scheme for efficient video communication, which aims at both energy saving and high QoS attainment. To achieve its objectives, PEMuR proposes the combined use of an energy aware hierarchical routing protocol with an intelligent video packet scheduling algorithm. The adopted routing protocol enables the selection of the most energy efficient routing paths, manages the network load according to the energy residues of the nodes and prevents useless data transmissions through the proposed use of an energy threshold. In this way, an outstanding level of energy efficiency is achieved. Additionally, the proposed packet scheduling algorithm enables the reduction of the video transmission rate with the minimum possible increase of distortion. In order to do so, it makes use of an analytical distortion prediction model that can accurately predict the resulted video distortion due to any error pattern. Thus, the algorithm may cope with limited available channel bandwidth by selectively dropping less significant packets prior to their transmission. Simulation results demonstrate the effectiveness of the proposed scheme. (C) 2010 Elsevier B.V. All rights reserved.