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Paper Abstract and Keywords
Presentation 2016-03-02 14:05
Synchronization Performance Evaluation of Network-Listening Based Synchronization with Loop-Back Self-Interference Canceller Using Real Signal Waveform
Sho Nabatame, Mitsukuni Konishi, Atsushi Nagate, Teruya Fujii (SoftBank) RCS2015-353
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. In the layered cell structure, eICIC (enhanced Inter-Cell Interference Coordination) is an essential technique to avoid the interference between the macro cells and the small cells when co-channel deployment is used. eICIC conducts interference coordination in the time domain. Therefore, accurate timing synchronization is required between the macro cells and the small cells. Although a timing synchronization method using GPS are widely known, it cannot be used indoors, so network-listening based synchronization is considered to be an effective synchronization method to synchronize the transmission timing between small cells and macro cells easily in even indoor environments. In the network-listening, small cells synchronizes own transmission timing with macro cells by receiving the macro-cell downlink signals. However, the loop-back signal from the small cells itself interferes the reception of the macro-cell synchronization signal. In order to solve the problem, we proposed to mute the transmission and avoid loop-back self-interference. However, the spectral efficiency is deteriorated by muting the transmission itself. In this paper, we propose a synchronization method that cancel loop-back self-interference without muting the transmission itself. In this paper, we clarify its synchronization accuracy by computer simulations using real signal waveform.
Keyword (in Japanese) (See Japanese page) 
(in English) Network-Listening Based Synchronization / Self-Interference Interference Canceller / Small-Cell / LTE-Advanced / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 472, RCS2015-353, pp. 121-126, March 2016.
Paper # RCS2015-353 
Date of Issue 2016-02-24 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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)
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Conference Information
Committee RCS CCS SR SRW  
Conference Date 2016-03-02 - 2016-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2016-03-RCS-CCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Synchronization Performance Evaluation of Network-Listening Based Synchronization with Loop-Back Self-Interference Canceller Using Real Signal Waveform 
Sub Title (in English)  
Keyword(1) Network-Listening Based Synchronization  
Keyword(2) Self-Interference Interference Canceller  
Keyword(3) Small-Cell  
Keyword(4) LTE-Advanced  
1st Author's Name Sho Nabatame  
1st Author's Affiliation SoftBank Corp (SoftBank)
2nd Author's Name Mitsukuni Konishi  
2nd Author's Affiliation SoftBank Corp (SoftBank)
3rd Author's Name Atsushi Nagate  
3rd Author's Affiliation SoftBank Corp (SoftBank)
4th Author's Name Teruya Fujii  
4th Author's Affiliation SoftBank Corp (SoftBank)
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Speaker Author-1 
Date Time 2016-03-02 14:05:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2015-353 
Volume (vol) vol.115 
Number (no) no.472 
Page pp.121-126 
Date of Issue 2016-02-24 (RCS) 

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