Sensing-based adaptive data reporting scheme in wireless sensor networks

Wireless sensor networks (WSNs) typically have a massive number of the sensor devices. The battery-powered (BP) sensor devices are the conventional type that has low transmission power due to the limited battery lifetime. The energy harvesting (EH) sensor devices can recharge their battery and therefore may transmit data with high transmission power. However, due to the low transmission power of the BP sensor device, the data reporting process can suffer from high access failure probability. To address this problem, we propose a sensing-based adaptive data reporting scheme. According to the spectrum sensing results, each sensor device determines the time and duration of data reporting. The sink node resolves the collisions by detecting the variation of the received signal power. The simulation results show that the proposed scheme decreases the access failure probability and increases the total number of successful reportings per frame.