This paper introduces the concept of intermittently connected sensor networks where sensors are sleep most of time and become active randomly and rarely. In the networks, packet collision probability and power consumption can be reduced. Meanwhile, the delivery delay increases with the use of the low activation values. In this paper, we design the energy-efficient intermittently connected sensor networks, considering this trade-off of activation control. We first provide the algorithm that computes the optimal packet forwarding rule achieving the minimum delivery delay, which can be calculated using the activation rates. We then propose the activation rate control methods, which control the activation rates of the sensors based on the density of the sensors and/or the number of wake-ups of sensors having relay packets. By doing this, we can improve the delay performance, while suppressing the increase in the packet collision probability and the power consumption of sensors. Through simulation experiments, we demonstrate the effectiveness of our activation control methods in the intermittently connected sensor networks. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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节能间歇连接传感器网络的设计

本文介绍了间歇连接传感器网络的概念，其中传感器大部分时间处于休眠状态，而随机且很少活动。在网络中，可以降低数据包冲突概率和功耗。同时，交付延迟随着使用低激活值而增加。在本文中，我们设计了节能的间歇连接传感器网络，考虑到激活控制的这种权衡。我们首先提供了计算实现最小传输延迟的最佳数据包转发规则的算法，可以使用激活率来计算。然后我们提出了激活率控制方法，该方法基于传感器的密度和/或具有中继数据包的传感器的唤醒次数来控制传感器的激活率。通过做这个，我们可以提高延迟性能，同时抑制数据包冲突概率和传感器功耗的增加。通过模拟实验，我们证明了我们的激活控制方法在间歇连接的传感器网络中的有效性。© 2021 日本电气工程师学会。由 Wiley Periodicals LLC 出版。