1Improving Beam Distribution Evenness in 3Dimensional Beamforming with Carrier
Aggregation
Jun-woo Kim, Gosan Noh, Jang-won Moon, Youn-ok Park, Il-gyu Kim
ETRI (Electronics and Telecommunications Research Institute), Korea
jwkim74@etri.re.kr, gsnoh@etri.re.kr, jwmoon@etri.re.kr, parkyo@etri.re.kr, igkim@etri.re.kr

Abstract— The 3-dimensional beamforming is a highly attractive issue in 5G telecommunication. Equipped with 2-dimensional
antenna arrays, it allows vertical sectorization within a cell as well as horizontal one, by making a beamforming zone for thecorresponding sector. However, there is considerable inequality among the areas of beamforming zone. Since the farther from the basestation, the bigger the beamforming zone area is, the farther beamforming zone area is likely support more users than nearer
beamforming zone. In this paper, we propose to utilize carrier aggregation (CA) from additional base stations for relieving theuneven beamforming zone area problem and prove this method is more efficient in improving cell throughput especially in mmWave
environment. Even if the additional base station is more simple type which offers only a few beamformings, it can effectively improvethe equality of UE’s radio resource occupation.
Keyword—3D Beamforming, Carrier Aggregation, 5G Telecommunication

Jun-woo Kim received the B.S. degree in electronics engineering from Kyongpook National University, Daegu, Korea, in 1996, the MS
from KAIST, Daejeon, Korea in 1998, and the Ph.D degree from Chungnam National University, Daejeon, Korea in 2013. From January
1998 to September 2001, he was a researcher of Dacom Corporation. Since October 2001, He has been working in ETRI, Daejeon, Korea,
where he currently works in a Giga wireless transmission research section as a senior engineer. His current research interests are VSLI, onchip communication architecture, and various modem design.

Gosan Noh received the B.S. and Ph.D degrees in Electrical and Electronic Engineering from Yonsei University, Seoul, Korea, in 2007 and2012, respectively. From March 2012 to February 2013, he was a Postdoctoral Researcher at the School of Electrical and ElectronicEngineering, Yonsei University, Seoul, Korea. Since March 2013, he has been with the Electronics and Telecommunications ResearchInstitute (ETRI), Daejeon, Korea, where he is a Senior Researcher. His research interests include millimeter wave transmission andpolarization diversity/multiplexing techniques.

Jang-won Moon received the BS degree in electronics engineering from Shibaura Institute of Technology, Tokyo, Japan, in 2007, the MS
degree in wireless communication engineering from Waseda University, Tokyo, Japan in 2009. Since 2010, He has been working in ETRI,Daejeon, Korea, where he currently works in a Giga wireless transmission research section as a senior engineer. His current researchinterests are VSLI, on-chip communication architecture, and various modem design.

Youn-Ok Park received the B.S. degree in Electronic Engineering from Hanyang University, Seoul, Korea, in 1986, M.S. and Ph.Ddegrees in Information and Communication Engineering from Chungnam National University, Daejeon, Korea in 1997 and 2011
respectively. From December 1985 to January 1987, he was a researcher of Samsung Electronics. Since February 1987, He has beenwith the Electronics and Telecommunications Research Institute (ETRI), Daejeon, Korea, where he is a Principal Member of TechnicalStaff of Giga wireless Transmission Research Laboratory Section.

2Il-gyu Kim received the B.S. and M.S. degrees in electronics engineering from the Seoul City University, Seoul, Korea, in 1993 and 1995, respectively. In1995, he joined the Network Implementation Section of Shinsegi Telecomm, Inc. (STI), Seoul, where he was involved in the implementation of CDMA cellularsystems. Since 2000, He has been working in ETRI, Daejeon, Korea, where he currently works in a Giga wireless transmission research section as a Section
Leader.