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Paper Abstract and Keywords
Presentation 2011-03-03 10:30
Proposal on an Improvement of the IMS-Circuit Switch Voice Call Continuity -- Local Anchoring SRVCC based on the Terminal Capability --
Katsutoshi Nishida, Takashi Koshimizu (NTT DOCOMO) NS2010-178
Abstract (in Japanese) (See Japanese page) 
(in English) The LTE access system and its core network, so-called Evolved Packet Core (EPC), which has lunched at the end of 2010 in Japan, is the next generation mobile network focusing on the packet switching function. Therefore, the voice service over the LTE (VoLTE：Voice over LTE) will be provided by the IMS (IP Multimedia Subsystem) that enables the call control over the IP network. At the initial phase of the LTE deployment, however, its overage will not be large enough and the mobile terminal using VoLTE service may move to an area where only 3G is available. SRVCC is the mechanism by which the voice call over the LTE can be handed over to the circuit switched network where the IMS in the home network performs the path switching of the call. Enhanced SRVCC (eSRVCC) is also discussed in the 3GPP (3rd Generation Partnership Project) in order to minimize the voice call handover delay. eSRVCC assumes the voice media data of originating/terminating calls are anchored in the visited network and the path switching of the call is also performed in it. In this paper, we clarify the issues of eSRVCC anchoring function and propose the flexible anchoring mechanism considering the terminal capability, etc.
Keyword (in Japanese) (See Japanese page) 
(in English) Voice over LTE / IMS / SRVCC / Handover / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 448, NS2010-178, pp. 85-90, March 2011.
Paper # NS2010-178 
Date of Issue 2011-02-24 (NS) 
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 NS2010-178

Conference Information
Committee IN NS  
Conference Date 2011-03-03 - 2011-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Convention Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General, NS+IN workshop (March 3-4) 
Paper Information
Registration To NS 
Conference Code 2011-03-IN-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Proposal on an Improvement of the IMS-Circuit Switch Voice Call Continuity 
Sub Title (in English) Local Anchoring SRVCC based on the Terminal Capability 
Keyword(1) Voice over LTE  
Keyword(2) IMS  
Keyword(3) SRVCC  
Keyword(4) Handover  
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1st Author's Name Katsutoshi Nishida  
1st Author's Affiliation NTT DOCOMO Inc. (NTT DOCOMO)
2nd Author's Name Takashi Koshimizu  
2nd Author's Affiliation NTT DOCOMO Inc. (NTT DOCOMO)
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Speaker Author-1 
Date Time 2011-03-03 10:30:00 
Presentation Time 20 minutes 
Registration for NS 
Paper # NS2010-178 
Volume (vol) vol.110 
Number (no) no.448 
Page pp.85-90 
#Pages 6 
Date of Issue 2011-02-24 (NS) 

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