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Paper Abstract and Keywords
Presentation 2023-12-15 15:40
Optimization of Base Station Coordinated Virtualized Cell MU-MIMO Canceller according to the Accuracy of Channel Estimation
Ryohei Maeda, Takafumi Fujii (SoftBank), Teruya Fujii (Tokyo Tech./SoftBank) RCS2023-204
Abstract (in Japanese) (See Japanese page) 
(in English) In mobile communication systems such as 5G, ultra-high-speed data transmission anywhere within a cell is expected. In cellular systems, which the same frequency is repeatedly reused in all cells, communication quality deteriorates due to adjacent cell interference, especially near cell boundaries. The authors have proposed an interference cancellation technique near cell boundaries that simultaneously uses a virtual cell MU-MIMO canceler and adaptive beamforming to cancel adjacent cell interference by forming a virtual cell in which neighboring base stations cooperate with each other, and have shown that it can significantly improve communication quality. In previous studies, interference cancellation weights were calculated based on the assumption that all channel responses can be ideally estimated using SRS or other methods. In reality, however, the estimation accuracy of the channel response, especially between cells, deteriorates due to the effect of the arrival timing gap of the SRS and other factors. If the channel response is used to calculate the interference cancellation weight, the interference cancellation effect will be degraded. In this study, we propose an algorithm to optimize the weights according to the estimation accuracy of the channel response.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile Communication / MU-MIMO / TDD / SRS / Network Coordination / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 308, RCS2023-204, pp. 141-146, Dec. 2023.
Paper # RCS2023-204 
Date of Issue 2023-12-07 (RCS) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF RCS2023-204

Conference Information
Committee NS RCS  
Conference Date 2023-12-14 - 2023-12-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyushu Institute of Technology Tobata campus, and Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Multi-hop/Relay/Cooperation, Disaster-resistant wireless network, Sensor/Mesh network, Ad-hoc network, D2D/M2M, Wireless network coding, Handover/AP switching/Connected cell control/Load balancing among base stations/Mobile network dynamic reconfiguration, QoS/QoE assurance, Wireless VoIP, IoT, Edge computing, etc. 
Paper Information
Registration To RCS 
Conference Code 2023-12-NS-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optimization of Base Station Coordinated Virtualized Cell MU-MIMO Canceller according to the Accuracy of Channel Estimation 
Sub Title (in English)  
Keyword(1) Mobile Communication  
Keyword(2) MU-MIMO  
Keyword(3) TDD  
Keyword(4) SRS  
Keyword(5) Network Coordination  
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Keyword(7)  
Keyword(8)  
1st Author's Name Ryohei Maeda  
1st Author's Affiliation SoftBank Corp. (SoftBank)
2nd Author's Name Takafumi Fujii  
2nd Author's Affiliation SoftBank Corp. (SoftBank)
3rd Author's Name Teruya Fujii  
3rd Author's Affiliation Tokyo Institute of Technology/SoftBank Corp. (Tokyo Tech./SoftBank)
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Speaker Author-1 
Date Time 2023-12-15 15:40:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2023-204 
Volume (vol) vol.123 
Number (no) no.308 
Page pp.141-146 
#Pages 6 
Date of Issue 2023-12-07 (RCS) 

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