Co-Circle: Energy-Efficient Collaborative Neighbor Discovery for IoT Applications
Zhong Shen, Chengcheng Gu, Xin Xiang · IEEE Internet of Things Journal · 2023
Device discovery or neighbor discovery, which enables devices to detect other devices in the vicinity, plays an important role in many IoT applications as it is a prerequisite for wireless communication and interaction with each other. In this article, we study collaborative neighbor discovery, where multiple sensors connected to a gateway collaborate to discover another mobile device. Such a scenario can be found in many applications, such as automotive keyless access system, smart home monitoring, asset tracking, and safety monitoring. We first build an analytical model called Co-Circle for collaborative neighbor discovery. Based on Co-Circle, we derive the lower bound of the expected discovery latency. Then, we show how the lower bound of the expected discovery latency varies with the energy budget (or duty cycle). Finally, we propose an optimal collaboration scheme that can achieve the lower bound of the expected discovery latency. Experimental results verify the performance of the proposed collaboration scheme.