정민영 교수

As demands for data communications among home/personal devices in home environments increase, various types of home-networking technologies have appeared. Among them, power line communication is one of the most promising wired home-networking technologies, because the existing power line facilities can be utilized for data transmission without deploying any new physical links. HomePlug 1.0 is the most popular power line communication technology, which has been standardized by the HomePlug power

An energy harvesting (EH) and information processing network based on two‐way multiplicative relay is proposed. In the proposed scheme, two nodes communicate with each other via an energy constrained multiplicative relay node. The relay node uses power splitting‐based relaying protocol for EH and information processing. The numerical results show that the proposed scheme outperforms the legacy amplify‐and‐forward EH relaying technique.

Abstract Device-to-device (D2D) communication-enabled cellular networks allow cellular devices to directly communicate with each other without any evolved NodeB (eNB). D2D communication aims to improve the spectral efficiency and increases the overall system capacity. For future mobile networks, intelligent radio resource allocation and power control schemes are required to accommodate the increasing number of cellular devices and their growing demand of data traffic. In this paper, a combined r

Accommodating an increasing number of machine‐to‐machine (M2M) devices is one of the main issues faced by the cellular networks. In a typical M2M setup, several devices may try to connect to the network simultaneously. Long‐term evolution advanced (LTE‐A) networks use a random access procedure for this purpose, which is not sufficient to cater for a large number of devices. The conventional procedure is extended by allowing several devices to access the network with reduced collisions. Mathemati

The use of a millimeter-wave band defined as a 30–300 GHz range is significant element for improving performance of 5th generation (5G) mobile communication systems. However, since the millimeter-wave signal has peculiar propagation characteristics especially toward non-line-of-sight regions, the system architecture and antenna structure for 5G mobile communications should be designed to overcome these propagation limitations. For realization of the 5G mobile communications, electronics and tele

The Home Phoneline Networking Alliance (HomePNA) 2.0 is an attractive proposition for home networking since it potentially allows transmission rates comparable to those of Ethernet, using existing installed telephone lines. This system adopts a CSMA/CD medium access control protocol with distributed fair priority queuing (DFPQ). We present a simple analytical model to compute the saturation throughput performance in the presence of a finite number of contending stations, which provides a guideli

Abstract In order to accommodate for the emerging mobile data traffic, millimetre‐wave (mmWave) band in 30–300GHz range is being considered for the fifth generation (5G) mobile networks. This mmWave band can potentially fulfil the bandwidth requirement of the next generation mobile networks for the next few decades and beyond. In this article, we propose a novel resource allocation scheme for mmWave in 5G mobile networks. The concept of multi‐beam coordination is adopted to efficiently utilise t

Abstract Although femtocell can confer various benefits to both operators and users, many technical issues, such as interference coordination, network synchronization, self-configuration, and self-optimization must be considered to effectively deploy femtocells in real environments. In this article, we develop a system-level simulator in order to evaluate performance of long-term evolution (LTE)-femtocell systems. The simulator consists of five functional modules which realize packet scheduling

Abstract In order to enable effective public safety services in challenged environments, 3rd Generation Partnership Program is considering the use of device‐to‐device (D2D) communications. D2D communications can be ideal in various emergency situations where the conventional network services get suspended. We propose a D2D‐based user equipment (UE) relaying process to support the out‐of‐range isolated UEs. The main idea is to allow UEs that have active connections with eNB to exchange data with

Ambient backscatter is a promising wireless communication technique where low-power users communicate with each other without any dedicated power source. These communicating users transmit their information by reflecting ambient radio-frequency (RF) signals. In this paper, we propose an ambient backscatter communications-assisted wireless-powered underlay cognitive radio network (CRN). The proposed CRN consists of a single primary transmitter (PT) and multiple primary receivers (PRs), secondary