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Paper Abstract and Keywords
Presentation 2017-06-01 12:15
A Study of Handover Reduction based on Moving Direction and Velocity of Users for 5G Multi-layered Networks
Akira Kishida, Yoshifumi Morihiro, Takahiro Asai, Yukihiko Okumura (NTT DOCOMO) MoNA2017-3
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 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 the 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. Moreover, users with high velocity suffer these issues more seriously. Therefore, we propose handover scheme considering both user's moving direction and locations of base stations, together with moving velocity. 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 / Cell Reselection / Handover / Radio Resource Management / Actual Environment / Metropolitan Environment / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 71, MoNA2017-3, pp. 61-66, June 2017.
Paper # MoNA2017-3 
Date of Issue 2017-05-25 (MoNA) 
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
Conference Date 2017-06-01 - 2017-06-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Chatan-cho Mihama MS 
Topics (in Japanese) (See Japanese page) 
Topics (in English) 5G, Mobile Applications, Ubiquitous Services, Mobile Distributed Cloud, ITS, etc. 
Paper Information
Registration To MoNA 
Conference Code 2017-06-MoNA-MBL-DPS-ITS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study of Handover Reduction based on Moving Direction and Velocity of Users for 5G Multi-layered Networks 
Sub Title (in English)  
Keyword(1) 5G  
Keyword(2) Cell Reselection  
Keyword(3) Handover  
Keyword(4) Radio Resource Management  
Keyword(5) Actual Environment  
Keyword(6) Metropolitan 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 2017-06-01 12:15:00 
Presentation Time 20 
Registration for MoNA 
Paper # IEICE-MoNA2017-3 
Volume (vol) IEICE-117 
Number (no) no.71 
Page pp.61-66 
#Pages IEICE-6 
Date of Issue IEICE-MoNA-2017-05-25 

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