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Paper Abstract and Keywords
Presentation 2013-03-08 10:00
Predictive Discarding of Registration for Fast Recovery of IMS-based Services
Takeshi Usui (NICT), Kohei Sugiyama, Atsushi Tagami (KDDI Lab), Nozomu Nishinaga (NICT) NS2012-277
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a method for fast reovery of IP Multimedia Subsystem (IMS) –based services, when the network connectivity after the network faults and disaster is recovered. IMS has been standardized for service stratum of fixed and mobile network. Because a large amount of user terminals (UTs) are assumed to use the IMS-based services, the scalability of the IMS nodes which treat signaling messages becomes an important issue. To use the IMS-based services, UTs need to send Register messages defined in Session Initiation Protocol to the IMS nodes. The network recovery scenario leads the IMS nodes heavily-loaded, because a large amount of Register messages arrive at the IMS nodes. They cannot quickly return the response, and UTs retransmits the Register messages. These messages encourage the load in the IMS nodes and delay the registration process of more UTs, because the IMS nodes redundantly process them. This paper proposes a predictive discarding for the fast recovery of IMS-based service. The proposed method discards the Register messages which the response will not arrive within the retransmission timer. The proposed method measures the round-trip time of Register messages and decides whether Register messages are discarded or not from that round-trip time. This paper shows the validness of the predicitve discarding, compared to the exisinng works tackling the scalability issues of the IMS nodes.
Keyword (in Japanese) (See Japanese page) 
(in English) SIP / IMS / Service recovery / Disaster / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 463, NS2012-277, pp. 651-656, March 2013.
Paper # NS2012-277 
Date of Issue 2013-02-28 (NS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee NS IN  
Conference Date 2013-03-07 - 2013-03-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Zanpamisaki Royal Hotel 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To NS 
Conference Code 2013-03-NS-IN 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Predictive Discarding of Registration for Fast Recovery of IMS-based Services 
Sub Title (in English)  
Keyword(1) SIP  
Keyword(2) IMS  
Keyword(3) Service recovery  
Keyword(4) Disaster  
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1st Author's Name Takeshi Usui  
1st Author's Affiliation National Institution Communication Technology (NICT)
2nd Author's Name Kohei Sugiyama  
2nd Author's Affiliation KDDI Laboratory (KDDI Lab)
3rd Author's Name Atsushi Tagami  
3rd Author's Affiliation KDDI Laboratory (KDDI Lab)
4th Author's Name Nozomu Nishinaga  
4th Author's Affiliation National Institution Communication Technology (NICT)
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Speaker Author-1 
Date Time 2013-03-08 10:00:00 
Presentation Time 20 minutes 
Registration for NS 
Paper # NS2012-277 
Volume (vol) vol.112 
Number (no) no.463 
Page pp.651-656 
#Pages
Date of Issue 2013-02-28 (NS) 


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