Beom-mu Kim

An Efficient Relay Scheme for multi-hop transmission in WiMedia Networks

In this paper, we propose a novel multi-hop transmission scheme for minimization of the end-to-end delay between source and destination. The simulation results show that proposed protocol can enhance the end-to-end delay performance and improve energy efficiency by minimizing the idle period of DRP reservation block.

Energy Based Interference Avoidance Scheme in Ubiquitous Medical Environments

WLAN and WPAN technologies will play an important role in ubiquitous healthcare application. In this paper, we propose an energy based interference avoidance scheme in ubiquitous medical environment using 2.4 GHz unlicensed industrial, scientific and medical (ISM) bands. This paper focuses on the coexistence of WLAN (IEEE 802.11b) and WPAN (IEEE 802.15.4) in the 2.4 GHz band. In the proposed scheme, we propose a new energy detection (ED) estimation scheme to detect interference from another network. The experiment and simulation results show that the proposed system improves coexistence performance required for ubiquitous medical environments.