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Paper Abstract and Keywords
Presentation 2015-09-01 09:10
A Quality Improvement Method for VoIP on Mobile Networks Considering Delay Spikes
Koichi Nihei, Kozo Satoda (NEC), Hiroshi Yoshida (NEC/Tokyo Tech) CQ2015-40
Abstract (in Japanese) (See Japanese page) 
(in English) Quality degradation of voice communication due to delay spikes, which are sudden large increases in the packet delay, is a key issue for VoIP on mobile networks. To resolve this issue, the authors have proposed a delay spike reduction method which controls the size (voice codec type) and sending interval of voice packets according to the radio communication quality and have con rmed the effectiveness of the delay spike reduction. This paper proposes a method which controls the size and sending interval of voice packets on the basis of quality of experience (QoE). The proposed method de nes a QoE indicator considering delay spikes and controls the size and sending interval for maximizing the QoE indicator. The method improves the mean opinion score (MOS) by 0.4.
Keyword (in Japanese) (See Japanese page) 
(in English) VoIP / delay spikes / mobile networks / LTE / QoE (Quality of Experience) / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 206, CQ2015-40, pp. 1-6, Sept. 2015.
Paper # CQ2015-40 
Date of Issue 2015-08-25 (CQ) 
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 CQ2015-40

Conference Information
Committee CQ  
Conference Date 2015-09-01 - 2015-09-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To CQ 
Conference Code 2015-09-CQ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Quality Improvement Method for VoIP on Mobile Networks Considering Delay Spikes 
Sub Title (in English)  
Keyword(1) VoIP  
Keyword(2) delay spikes  
Keyword(3) mobile networks  
Keyword(4) LTE  
Keyword(5) QoE (Quality of Experience)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Koichi Nihei  
1st Author's Affiliation NEC Corporation (NEC)
2nd Author's Name Kozo Satoda  
2nd Author's Affiliation NEC Corporation (NEC)
3rd Author's Name Hiroshi Yoshida  
3rd Author's Affiliation NEC Corporation/Tokyo Institute of Technology (NEC/Tokyo Tech)
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Speaker Author-1 
Date Time 2015-09-01 09:10:00 
Presentation Time 20 minutes 
Registration for CQ 
Paper # CQ2015-40 
Volume (vol) vol.115 
Number (no) no.206 
Page pp.1-6 
#Pages 6 
Date of Issue 2015-08-25 (CQ) 

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