Presentation 2021-08-27
A Study on Intelligent Reflecting Surface (IRS) Aided Cell-Free Network
Takahiro Ohyama, Yuichi Kawamoto, Nei Kato,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) The IRS (Intelligent Reflecting Surface), which enables control of propagation characteristics, is attracting attention as a technology that greatly improves energy utilization efficiency in 6th generation mobile communication systems. In addition, cell-free networks are being actively researched as a new network architecture that solves the problem of inter-cell interference in conventional cellular networks. In this report, we consider a cell-free network that includes the IRS. We propose a QUBO formulation to optimize the IRS reflection coefficients when multiple BSs communicate with a user in a shadowing environment via the IRS at the same time by quantum computing. The simulation results show the effectiveness of the proposed QUBO formulation and clarifies that efficient communication can be realized by multiple access by TDMA.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Intelligent Reflecting Surface (IRS) / Cell-Free Network / Reflection Coefficients Optimization / Quantum Computing
Paper # RCS2021-112
Date of Issue 2021-08-19 (RCS)

Conference Information
Committee RCS / SAT
Conference Date 2021/8/26(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Eiji Okamoto(Nagoya Inst. of Tech.) / Hiroyasu Ishikawa(Nihon Univ.)
Vice Chair Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) / Tetsushi Ikegami(Meiji Univ.) / Takana Kaho(Shonan Inst. of Tech.)
Secretary Toshihiko Nishimura(NEC) / Tomoya Tandai(Panasonic) / Fumihide Kojima(KDDI Research) / Tetsushi Ikegami(NICT) / Takana Kaho
Assistant Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Daisuke Goto(NTT) / Yuuki Koizumi(NHK)

Paper Information
Registration To Technical Committee on Radio Communication Systems / Technical Committee on Satellite Telecommunications
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Study on Intelligent Reflecting Surface (IRS) Aided Cell-Free Network
Sub Title (in English) IRS Reflection Coefficients Optimization by Quantum Computing
Keyword(1) Intelligent Reflecting Surface (IRS)
Keyword(2) Cell-Free Network
Keyword(3) Reflection Coefficients Optimization
Keyword(4) Quantum Computing
1st Author's Name Takahiro Ohyama
1st Author's Affiliation Panasonic System Networks R&D Lab. Co., Ltd.(PSNRD)
2nd Author's Name Yuichi Kawamoto
2nd Author's Affiliation Tohoku University(Tohoku Univ.)
3rd Author's Name Nei Kato
3rd Author's Affiliation Tohoku University(Tohoku Univ.)
Date 2021-08-27
Paper # RCS2021-112
Volume (vol) vol.121
Number (no) RCS-153
Page pp.pp.69-74(RCS),
#Pages 6
Date of Issue 2021-08-19 (RCS)