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Paper Abstract and Keywords
Presentation 2022-03-11 13:00
Performance improvement method of Local 5G mobile core network in mMTC scenario
Yu Kimura, Akihiro Nakao (Univ of Tokyo) NS2021-153
Abstract (in Japanese) (See Japanese page) 
(in English) Local 5G is expected as a new wireless communication technology to accommodate a large number of IoT devices. In recent years software base stations have emerged with the advancement of NFV/SDN and are expected to be used in local 5G. Software base stations enable low-cost and flexible operation compared to conventional dedicated base stations implemented with dedicated hardware. On the other hand, there is an issue that a method for evaluating their performance in a Local 5G environment has not yet been established. In addition when congestion occurs, such as when a large number of UEs send signaling messages at the same time to a mobile core network, it is difficult to operate delay-sensitive applications stably. In this paper, we first built an end-to-end Local 5G mMTC system with a software base station and real UEs and propose a method to evaluate the performance of 5G mobile core network in mMTC scenario.
In addition we evaluated the performance of the software base station with our proposed method in this Local 5G environment and actually identified the bottleneck of the mobile core network.
We also applied an implementation improving the identified bottleneck and show that it can actually improve the performance of the mobile core in our Local 5G environment. Specifically we identified that AMF becomes a bottleneck when congestion occurs in mobile core network and by scaling out the processing in AMF among CPU cores, we were able to reduce the average response time by 47% at most under congestion.
Keyword (in Japanese) (See Japanese page) 
(in English) Local5G / mMTC / software base station / performance / mobile core network / control plane / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 433, NS2021-153, pp. 181-186, March 2022.
Paper # NS2021-153 
Date of Issue 2022-03-03 (NS) 
ISSN 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)
Download PDF NS2021-153

Conference Information
Committee NS IN  
Conference Date 2022-03-10 - 2022-03-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To NS 
Conference Code 2022-03-NS-IN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance improvement method of Local 5G mobile core network in mMTC scenario 
Sub Title (in English)  
Keyword(1) Local5G  
Keyword(2) mMTC  
Keyword(3) software base station  
Keyword(4) performance  
Keyword(5) mobile core network  
Keyword(6) control plane  
1st Author's Name Yu Kimura  
1st Author's Affiliation University of Tokyo (Univ of Tokyo)
2nd Author's Name Akihiro Nakao  
2nd Author's Affiliation University of Tokyo (Univ of Tokyo)
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Speaker Author-1 
Date Time 2022-03-11 13:00:00 
Presentation Time 20 minutes 
Registration for NS 
Paper # NS2021-153 
Volume (vol) vol.121 
Number (no) no.433 
Page pp.181-186 
Date of Issue 2022-03-03 (NS) 

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