Hierarchical MAC protocol with multi-channel allocation for enhancing IEEE 802.11ah relay networks. - Saurabh Kumar 009; HoChul Lim; HyungWon Kim 001 (IWCMC, 2015)

Low Power Time Synchronization for Wireless Sensor Networks Using Density-Driven Scheduling. - HoChul Lim; HyungWon Kim 001 (J. Inform. and Commun. Convergence Engineering, 2018)