arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1105.2292cs.NI
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无线传感器网络中能量感知的缓冲机制分析

Analysis of Power-aware Buffering Schemes in Wireless Sensor Networks

Yibei Ling, ChungMin Chen, Shigang Chen

摘要:

研究了电池供电的传感器网络中的能量感知缓冲问题,重点研究了固定大小和固定间隔的缓冲机制。主要的动机是解决尚未了解的大小变化引起的影响,对功耗感知的缓冲方案。我们的理论分析阐明了固定大小和固定间隔的缓冲方案在数据大小变化的存在下的根本区别。它表明,数据大小的变化有不利的影响,在一般情况下,固定大小的缓冲的功耗,并揭示了大小变化引起的影响可以减轻由正偏度或促进由负偏度的大小分布。相比之下,固定间隔缓冲方案具有明显的优势,即不受数据大小变化的影响。因此,固定间隔缓冲方案是一种风险规避策略,其鲁棒性在各种操作环境。此外,基于固定间隔缓冲机制,建立了静态数据汇集树中子节点与父结点的功耗关系,深入分析了子节点带宽分配对父节点功耗的影响。这项研究是具有实际意义的:它揭示了新的光之间的关系的功耗的缓冲方案,功率参数的无线电模块和存储体,数据到达率和数据大小的变化,从而提供了明智的指导,在确定最佳的缓冲区大小(间隔),以最大限度地提高传感器网络的运行寿命。

英文摘要:

We study the power-aware buffering problem in battery-powered sensor networks, focusing on the fixed-size and fixed-interval buffering schemes. The main motivation is to address the yet poorly understood size variation-induced effect on power-aware buffering schemes. Our theoretical analysis elucidates the fundamental differences between the fixed-size and fixed-interval buffering schemes in the presence of data size variation. It shows that data size variation has detrimental effects on the power expenditure of the fixed-size buffering in general, and reveals that the size variation induced effects can be either mitigated by a positive skewness or promoted by a negative skewness in size distribution. By contrast, the fixed-interval buffering scheme has an obvious advantage of being eminently immune to the data-size variation. Hence the fixed-interval buffering scheme is a risk-averse strategy for its robustness in a variety of operational environments. In addition, based on the fixed-interval buffering scheme, we establish the power consumption relationship between child nodes and parent node in a static data collection tree, and give an in-depth analysis of the impact of child bandwidth distribution on parent's power consumption. This study is of practical significance: it sheds new light on the relationship among power consumption of buffering schemes, power parameters of radio module and memory bank, data arrival rate and data size variation, thereby providing well-informed guidance in determining an optimal buffer size (interval) to maximize the operational lifespan of sensor networks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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