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Paper Abstract and Keywords
Presentation 2014-12-19 13:30
A Study on Small-Cell Transmission Timing Control for eICIC
Sho Nabatame, Daigo Ogata, Atsushi Nagate (SoftBank Mobile) RCS2014-259
Abstract (in Japanese) (See Japanese page) 
(in English) The overlaid cell structure, in which a large number of small cells are deployed in a macro-cell coverage area, is considered to be a promising approach in order to accommodate rapidly increasing mobile data traffic. When co-channel deployment is used in the overlaid cell structure, the interference between macro and small cells becomes an issue and it needs to be solved in order to increase system capacity. eICIC is an effective technique to control the co-channel interference. In eICIC, the interference from a macro-cell eNB to small cells or vice versa can be avoided by stopping some parts of the downlink signal transmission in the time domain. Therefore, accurate timing synchronization is important in order to introduce eICIC effectively. Although some timing synchronization methods such as a method using GNSS (GPS) or IEEE 1588 v2 are widely known, it is a common practice to synchronize the transmission timing of macro and small cells. Hence, the terminals at the cell edge between macro and small cells, which receives strong interference from the other cell, experience different received timing from the macro and small cells depending on the distance between the base stations or the cell radius of the small cell. In this paper, we propose a transmission timing control method of small cell based on the distance or the small-cell radius and clarify the performance of the proposed method using 3GPP LTE-compliant equipment.
Keyword (in Japanese) (See Japanese page) 
(in English) Overlaid cell structure / eICIC / Timing synchronization / Transmission timing control / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 372, RCS2014-259, pp. 231-236, Dec. 2014.
Paper # RCS2014-259 
Date of Issue 2014-12-11 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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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 RCS2014-259

Conference Information
Committee RCS NS  
Conference Date 2014-12-18 - 2014-12-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Iseshi-Kanko-Bunka-Kaikan (Mie) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Ad-hoc Network, Ubiquitous Network, Wireless Communication, security, Multi-Access Network 
Paper Information
Registration To RCS 
Conference Code 2014-12-RCS-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Small-Cell Transmission Timing Control for eICIC 
Sub Title (in English)  
Keyword(1) Overlaid cell structure  
Keyword(2) eICIC  
Keyword(3) Timing synchronization  
Keyword(4) Transmission timing control  
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1st Author's Name Sho Nabatame  
1st Author's Affiliation SoftBank Mobile Corporation (SoftBank Mobile)
2nd Author's Name Daigo Ogata  
2nd Author's Affiliation SoftBank Mobile Corporation (SoftBank Mobile)
3rd Author's Name Atsushi Nagate  
3rd Author's Affiliation SoftBank Mobile Corporation (SoftBank Mobile)
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Speaker
Date Time 2014-12-19 13:30:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2014-259 
Volume (vol) IEICE-114 
Number (no) no.372 
Page pp.231-236 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2014-12-11 


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