A Power-Variation Model for Sensor Node and the Impact against Life Time of Wireless Sensor Networks
A Power-Variation Model for Sensor Node and the Impact against Life Time of Wireless Sensor Networks
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DOI：
10.1587/elex.7.197
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发表时间：
2006-10
期刊：
影响因子：
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通讯作者：
T. Matsuda;T. Takeuchi;T. Aonishi;Masumi Ichien;H. Kawaguchi;C. Ohta;M. Yoshimoto
中科院分区：
文献类型：
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作者：
T. Matsuda;T. Takeuchi;T. Aonishi;Masumi Ichien;H. Kawaguchi;C. Ohta;M. Yoshimoto
我们将制造变化引入无线传感器网络节点的功率模型。无线传感器网络的网络协议，如媒体访问控制和路由，应该在整个系统的生命周期方面进行评估。实际上，由于制造差异，存在逐节点的功率变化。然而，在以前的研究中，这种效果并没有被调查，因为它一直假设所有节点具有相同的功率。在本文中，我们开发了一个传感器节点的功率模型，其中我们认为阈值电压的变化来自制造过程。我们把微处理器和RF部分考虑到模型，并将其实现到QualNet，以评估对无线传感器网络的生命周期的影响。仿真结果表明，传统的模型高估了生命时间比我们的模型时，节点是随机部署。相比之下，如果我们通过利用功率变化来进行节点的最佳部署，则与传统模型的情况相比，网络寿命延长了12.7%。
We introduce manufacturing variation into a power model for a wireless sensor network node. Network protocols for the wireless sensor networks such as media access control and routing should be evaluated in terms of life time in a whole system. In fact, there exists power variation node by node due to the manufacturing variation. In the previous researches, however, this effect has not been investigated at all since it has been supposed that all nodes have a same power. In this paper, we develop a power model for a sensor node, in which we consider threshold-voltage variation derived from a manufacturing process. We take both a microprocessor and an RF part into account for the model, and implement it to QualNet in order to evaluate the impact against a life time of a wireless sensor network. The simulation results show that the conventional model has overestimated the life time longer than our model when nodes are randomly deployed. In contrast, if we make an optimum deployment of nodes by exploiting the power variation, the network life time is extended by 12.7% compared to the case of the conventional model.