Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka 565-0871, Japan.
Sensors (Basel). 2011;11(9):8241-60. doi: 10.3390/s110908241. Epub 2011 Aug 25.
To realize the ambient information society, multiple wireless networks deployed in the region and devices carried by users are required to cooperate with each other. Since duty cycles and operational frequencies are different among networks, we need a mechanism to allow networks to efficiently exchange messages. For this purpose, we propose a novel inter-networking mechanism where two networks are synchronized with each other in a moderate manner, which we call stepwise synchronization. With our proposal, to bridge the gap between intrinsic operational frequencies, nodes near the border of networks adjust their operational frequencies in a stepwise fashion based on the pulse-coupled oscillator model as a fundamental theory of synchronization. Through simulation experiments, we show that the communication delay and the energy consumption of border nodes are reduced, which enables wireless sensor networks to communicate longer with each other.
为了实现环境信息社会，需要在该区域部署多个无线网络以及用户携带的设备，以实现彼此之间的协作。由于网络之间的工作周期和工作频率不同，我们需要一种机制来允许网络有效地交换消息。为此，我们提出了一种新的网络间机制，其中两个网络以适度的方式相互同步，我们称之为逐步同步。通过我们的方案，为了弥合固有工作频率之间的差距，网络边界附近的节点根据脉冲耦合振荡器模型（作为同步的基本理论）以逐步的方式调整其工作频率。通过仿真实验，我们表明边界节点的通信延迟和能耗都得到了降低，这使得无线传感器网络能够彼此更长时间地进行通信。
