Utility-based scheduling algorithm for wireless multi-media sensor networks
Utility-based scheduling algorithm for wireless multi-media sensor networks
复制标题
基于效用的无线多媒体传感器网络调度算法
DOI：
10.1109/pimrc.2015.7343453
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Heli Zhang
中科院分区：
文献类型：
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作者：
Han Hao;Ke Wang;Hong Ji;Xi Li;Heli Zhang
无线传感器网络（WSNs）已广泛应用于监控和监控领域。随着传感器节点处理能力的提高，无线传感器网络的多媒体传输已成为一个新的发展趋势。由于多媒体具有严格的服务质量要求，因此需要高效的调度算法，既能保证端到端时延，又能降低能耗。因此，本文提出了一种基于效用的调度算法，该算法既能提高多媒体系统的能效，又能满足多媒体系统的QoS要求。本文提出的调度算法包括两个步骤：首先，利用半马尔可夫模型预测多媒体的到达率；其次，设计了基于能耗和QoS约束的效用函数；仿真结果表明，与传统调度算法相比，本文提出的调度算法在缓冲区溢出导致的丢包率和端到端延迟方面表现更好。
Wireless Sensor Networks (WSNs) have been widely deployed in monitoring and surveillance areas. With the improvement of sensor nodes' processing capability, multi-media transmission in WSNs has become a new trend. Since multi-media has strict Quality of Service (QoS) requirements, which calls for efficient scheduling algorithm that could guarantee the end-to-end delay and reduce the energy consumption. Therefore, in this paper we propose a utility-based scheduling algorithm that could enhance the energy efficiency and meet the QoS requirements of multimedia. Our proposed scheduling algorithm includes two steps: firstly, a semi-Markov model is deployed to predict the arrival rate of multi-media; secondly, a utility function is designed which based on the consideration of energy consumption and the QoS constraints. Simulations show that, compared to conventional algorithms, our proposed scheduling algorithm performs better in terms of packet loss rate due to buffer overflow and end-to-end delay.