Gun-Hee Kim  Ikjune Yoon

10.5626/JOK.2025.52.8.700

Wireless Sensor Network hotspot issue battery capacity Residual energy Retransmission duplicate transmission

Wireless sensor networks often face limited lifespans due to constrained battery capacity. Specifically, the multi-hop transmission mechanism causes energy depletion in nodes located near the sink, as data converges at these nodes, making them susceptible to energy exhaustion and transmission failures. To overcome the lifetime limitations of sensor nodes, energy harvesting techniques have been employed as a promising solution. However, harvested energy cannot be stored beyond the battery capacity, leading to surplus energy that goes unused. In this paper, we propose a novel scheme to address data loss by effectively utilizing this excess harvested energy. Our method retransmits lost data during transmission errors by leveraging surplus energy that exceeds the battery threshold. Additionally, if extra energy remains, the scheme performs redundant transmissions to enhance data reliability. Simulation results demonstrate that our proposed scheme successfully collects more data compared to conventional approaches, highlighting its effectiveness in recovering from transmission errors.