Wake–up Control for Wireless Sensor Networks Collecting top–k Data with Temporal Correlation
Junya Shiraishi, Hiroyuki Yomo · 2020
This paper considers the periodical top-k query for wireless sensors, where a sink periodically seeks top-k values and corresponding nodes-IDs in a sensing field. We advocate applying wake-up receivers in this scenario in order to reduce the wasteful energy consumption of sensor nodes. A wake-up control is proposed for the sink to collect top-k data with temporal correlation with small amount of energy. Specifically, the proposed scheme employs different types of wake-up control, which aims to wake up only the subset of nodes whose owning data contribute to the identification of current top-k set by exploiting temporal correlation. The numerical results confirm the effectiveness of our proposed scheme compared with the conventional wake-up control for top-k query in terms of average energy consumption, especially when the degree of correlation is high.