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Paper Abstract and Keywords
Presentation 2017-04-25 13:05
A Study of Handover Reduction considering Moving Direction of UE for 5G Multi-layered Networks with Overlay Structure
Akira Kishida, Yoshifumi Morihiro, Takahiro Asai, Yukihiko Okumura (NTT DOCOMO) RCS2017-22
Abstract (in Japanese) (See Japanese page) 
(in English) In forthcoming fifth-generation (5G) radio access networks, Radio Access Technology (RAT) or cell layer, which represents specific mobile communication system with specific frequency bands, with different frequency bands with various signal bandwidths will be overlaid on each other. Under this deployment, the one of key factors for improvement of high-speed transmission and capacity enhancement of wireless resource is effective utilization of small cells and spot cells which use high frequency band such as Super High Frequency (SHF) or Extremely High Frequency (EHF). However, frequent handovers across cell layers or within the cell layer will be occurred in the deployment if the conventional handover scheme is applied. Especially in actual metropolitan environments, due to distortion of radio propagation by these buildings, there is possibility that users select a cell which locates in opposite side of user's moving direction for connection. This phenomenon increases the number of handovers in addition to the issue described above. Therefore, we propose handover scheme considering both user's moving direction and locations of base stations. Moreover, the number of handovers and the average flow time characteristics are evaluated by system level simulations and verify the effectiveness of the proposed scheme in this paper.
Keyword (in Japanese) (See Japanese page) 
(in English) 5G / Handover / Radio Resource Management / Cell Selection / Actual Environment / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 11, RCS2017-22, pp. 113-118, April 2017.
Paper # RCS2017-22 
Date of Issue 2017-04-17 (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  
Conference Date 2017-04-24 - 2017-04-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Kotohira Onsen Kotosankaku 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Radio Access Technologies, etc. 
Paper Information
Registration To RCS 
Conference Code 2017-04-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study of Handover Reduction considering Moving Direction of UE for 5G Multi-layered Networks with Overlay Structure 
Sub Title (in English)  
Keyword(1) 5G  
Keyword(2) Handover  
Keyword(3) Radio Resource Management  
Keyword(4) Cell Selection  
Keyword(5) Actual Environment  
1st Author's Name Akira Kishida  
1st Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
2nd Author's Name Yoshifumi Morihiro  
2nd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
3rd Author's Name Takahiro Asai  
3rd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
4th Author's Name Yukihiko Okumura  
4th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
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Date Time 2017-04-25 13:05:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2017-22 
Volume (vol) IEICE-117 
Number (no) no.11 
Page pp.113-118 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2017-04-17 

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