IEEE Harbin ComSoc Chapter Academic Activities : Invited Talk by Prof. Fumiyuki Adachi

IEEE Harbin ComSoc Chapter Advanced Communications Technologies Forum 2019

At the invitation of Prof. Qiyue Yu (IEEE Senior Member), Prof. Fumiyuki Adachi (IEEE Fellow,IEICE Fellow), an internationally renowned wireless communications expert from Northeast University of Japan, visits IEEE Harbin ComSoc Chapter from August 8th to August 11th, 2019. The detailed information of the lectures are as follows:

Title 1:

Enhancing 5G Radio Access Networks by Exploitation of Spatially Distributed Antennas and Users

Date and Time:

9:30-11:00, Aug 9th, 2019

Location:

ROOM 1013, BUILDING 2A, NO.2 YIKUANG STREET,

HARBIN, HEILONGJIANG, CHINA

Abstract:

The 5th generation (5G) mobile communication services are now about to start. In 5G systems, a significant improvement in the spectrum efficiency is demanded. The distributed MIMO is promising for improving the spectrum efficiency of radio access network (RAN). A number of antennas are spatially distributed in a base station (BS)-cell area. Some antennas near a user is selected for cooperative signal transmission and the same radio resource is simultaneously reused within BS-cell area. User clustering with antenna selection beyond the user cluster border can effectively reduce the intra-cell interference. Adjacent BSs are loosely coordinated to improve the scalability of RAN. As a result, the inter-cell interference (ICI) is produced. The ICI coordination based on the fractional frequency reuse (FFR) is applied for cell-edge users. The link capacity evaluation by computer simulation of distributed MIMO RAN with cooperative signal transmission, user clustering, and ICI coordination is presented.

 

Title 2:

Decentralized Radio Resource Management for Dense Heterogeneous Wireless Networks

Date and Time:

14:00-15:30, Aug 9th, 2019

Location:

ROOM 1013, BUILDING 2A, NO.2 YIKUANG STREET,

HARBIN, HEILONGJIANG, CHINA

Abstract:

Due to the limited available bandwidth, the spectrum-efficiency was the most important concern for the last few decades. Also, the available energy, in particular, for battery operated user equipments (UEs), is limited. Therefore, the spectrum and energy-efficiencies will remain an eternal concern for mobile communication networks. One promising solution to improve both the spectrumy and energy-efficiencies is to introduce the small-cell structured network. However, wide range of UE mobility is problematic and causes frequent handover. Furthermore, UE density is not necessarily high everywhere. Recently, the heterogeneous wireless networks (HetNets) are attracting a lot of attention. In dense HetNets, a number of small base stations (SBSs) are deployed in the area of a macro BS (MBS). Decentralized management of limited radio resources is attractive to achieve flexible deployment of a number of SBSs and higher scalability of HetNets. In this presentation, we introduce decentralized SBS power on/off and decentralized dynamic channel assignment and their impacts on network power consumption, throughput, and handover (HO).

 

Biography:

Fumiyuki Adachi received the B.S. and Dr. Eng. degrees in electrical engineering from Tohoku University, Sendai, Japan, in 1973 and 1984, respectively. In April 1973, he joined the Electrical Communications Laboratories of Nippon Telegraph & Telephone Corporation (now NTT) and conducted various researches on digital cellular mobile communications. From July 1992 to December 1999, he was with NTT Mobile Communications Network, Inc. (now NTT DoCoMo, Inc.), where he led a research group on Wideband CDMA for 3G systems. Since January 2000, he has been with Tohoku University, Sendai, Japan. His research interests are in wireless signal processing (multi-access, equalization, antenna diversity, adaptive transmission, channel coding, etc.) and networking.

He is an IEEE Life Fellow and an IEICE Fellow. He was a recipient of the IEEE Vehicular Technology Society Avant Garde Award 2000, IEICE Achievement Award 2002, Thomson Scientific Research Front Award 2004, Ericsson Telecommunications Award 2008, Prime Minister Invention Award 2010, KDDI Foundation Excellent Research Award 2012, C&C Prize 2014, IEEE VTS Stuart Meyer Memorial Award 2017, and IEEE ComSoc RCC Technical Recognition Award 2017He is listed in Highly Cited Researchers 2001 (https://clarivate.com/hcr/researchers-list/archived-lists/).

 

Group Photos of the meeting:

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