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Paper Abstract and Keywords
Presentation 2014-06-18 09:00
Improvements of FBS Resource Utilization and Convergence Time of ABS Assignment using Dynamic ABS Assignment in HetNet
Masayoshi Ozawa, Tomoaki Ohtsuki (Keio Univ.) RCS2014-58
Abstract (in Japanese) (See Japanese page) 
(in English) In HetNet (Heterogeneous Network), low transmit power base stations (BSs) such as pico and femto BSs (PBSs and FBSs) are deployed in highly dense area or in indoor area within the coverage of macro cells.
Since BSs are close to each other in HetNet, indoor or cell-edge users are likely to experience outage due to inter-cell interference.
Therefore, almost blank subframe (ABS) technique used to indicate the transmission stop time of the BSs is proposed to mitigate inter-cell interference.
One of conventional ABS techniques is dynamic ABS assignment, which is able to adapt to interference environments.
In the dense deployment of BSs, FBS's resource utilization decreases due to the increase of the number of ABS assignments.
In addition, the ABS assignment time should be short enough to adapt to the change of environments.
In this report, we propose a dynamic ABS assignment method to improve FBS resource utilization and convergence time of subframe assignment.
In the proposed method, each BS gets the feedback from the surrounding BSs and users.
Controlling the number of feedback makes the convergence of subframe assignment fast.
Through simulation, we compare our proposed method with the conventional dynamic ABS assignment.
We show that the proposed method improves convergence time of subframe assignment and FBS resource utilization.
Keyword (in Japanese) (See Japanese page) 
(in English) Long term evolution / Heterogeneous network / Almost blank subframe / Femto base station / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 86, RCS2014-58, pp. 149-154, June 2014.
Paper # RCS2014-58 
Date of Issue 2014-06-10 (RCS) 
ISSN Print edition: ISSN 0913-5685    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 RCS2014-58

Conference Information
Committee RCS  
Conference Date 2014-06-17 - 2014-06-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa-ken Seinenkaikan (Naha) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Resource Control, Scheduling, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2014-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvements of FBS Resource Utilization and Convergence Time of ABS Assignment using Dynamic ABS Assignment in HetNet 
Sub Title (in English)  
Keyword(1) Long term evolution  
Keyword(2) Heterogeneous network  
Keyword(3) Almost blank subframe  
Keyword(4) Femto base station  
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1st Author's Name Masayoshi Ozawa  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Tomoaki Ohtsuki  
2nd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2014-06-18 09:00:00 
Presentation Time 8 minutes 
Registration for RCS 
Paper # RCS2014-58 
Volume (vol) vol.114 
Number (no) no.86 
Page pp.149-154 
#Pages 6 
Date of Issue 2014-06-10 (RCS) 

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