An IMS Restoration System with Selective Storing of Session States
Summary :
It is known that the IP Multimedia Subsystem (IMS) provides various telecom services e.g., VoIP, instant messaging, and video conferencing. In the IMS, these services are provided with session initiation protocol (SIP) handled by call/session control function servers (CSCFs). Completing the SIP signaling call flow without delay is vital to provide satisfactory services to the users. For service continuity, previous studies redundantly synchronized session states of CSCFs with backup servers. This paper proposes an IMS restoration system that selectively stores the session states. This is achieved by utilizing the retransmission mechanism of SIP. Time-based simulation emulating the process of backup servers shows that the proposed system reduces the number of backup servers to less than 38% compared to the previous studies, without degrading the service quality.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E97-B No.9 pp.1853-1864
- Publication Date
- 2014/09/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E97.B.1853
- Type of Manuscript
- PAPER
- Category
- Network
Authors
Takeshi USUI
KDDI R&D Laboratories, Inc.
Yoshinori KITATSUJI
KDDI R&D Laboratories, Inc.
Hidetoshi YOKOTA
KDDI R&D Laboratories, Inc.
Kiyohide NAKAUCHI
NICT
Yozo SHOJI
NICT
Nozomu NISHINAGA
NICT
Keyword
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Takeshi USUI, Yoshinori KITATSUJI, Hidetoshi YOKOTA, Kiyohide NAKAUCHI, Yozo SHOJI, Nozomu NISHINAGA, "An IMS Restoration System with Selective Storing of Session States" in IEICE TRANSACTIONS on Communications,
vol. E97-B, no. 9, pp. 1853-1864, September 2014, doi: 10.1587/transcom.E97.B.1853.
Abstract: It is known that the IP Multimedia Subsystem (IMS) provides various telecom services e.g., VoIP, instant messaging, and video conferencing. In the IMS, these services are provided with session initiation protocol (SIP) handled by call/session control function servers (CSCFs). Completing the SIP signaling call flow without delay is vital to provide satisfactory services to the users. For service continuity, previous studies redundantly synchronized session states of CSCFs with backup servers. This paper proposes an IMS restoration system that selectively stores the session states. This is achieved by utilizing the retransmission mechanism of SIP. Time-based simulation emulating the process of backup servers shows that the proposed system reduces the number of backup servers to less than 38% compared to the previous studies, without degrading the service quality.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E97.B.1853/_p
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@ARTICLE{e97-b_9_1853,
author={Takeshi USUI, Yoshinori KITATSUJI, Hidetoshi YOKOTA, Kiyohide NAKAUCHI, Yozo SHOJI, Nozomu NISHINAGA, },
journal={IEICE TRANSACTIONS on Communications},
title={An IMS Restoration System with Selective Storing of Session States},
year={2014},
volume={E97-B},
number={9},
pages={1853-1864},
abstract={It is known that the IP Multimedia Subsystem (IMS) provides various telecom services e.g., VoIP, instant messaging, and video conferencing. In the IMS, these services are provided with session initiation protocol (SIP) handled by call/session control function servers (CSCFs). Completing the SIP signaling call flow without delay is vital to provide satisfactory services to the users. For service continuity, previous studies redundantly synchronized session states of CSCFs with backup servers. This paper proposes an IMS restoration system that selectively stores the session states. This is achieved by utilizing the retransmission mechanism of SIP. Time-based simulation emulating the process of backup servers shows that the proposed system reduces the number of backup servers to less than 38% compared to the previous studies, without degrading the service quality.},
keywords={},
doi={10.1587/transcom.E97.B.1853},
ISSN={1745-1345},
month={September},}
Copy
TY - JOUR
TI - An IMS Restoration System with Selective Storing of Session States
T2 - IEICE TRANSACTIONS on Communications
SP - 1853
EP - 1864
AU - Takeshi USUI
AU - Yoshinori KITATSUJI
AU - Hidetoshi YOKOTA
AU - Kiyohide NAKAUCHI
AU - Yozo SHOJI
AU - Nozomu NISHINAGA
PY - 2014
DO - 10.1587/transcom.E97.B.1853
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E97-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 2014
AB - It is known that the IP Multimedia Subsystem (IMS) provides various telecom services e.g., VoIP, instant messaging, and video conferencing. In the IMS, these services are provided with session initiation protocol (SIP) handled by call/session control function servers (CSCFs). Completing the SIP signaling call flow without delay is vital to provide satisfactory services to the users. For service continuity, previous studies redundantly synchronized session states of CSCFs with backup servers. This paper proposes an IMS restoration system that selectively stores the session states. This is achieved by utilizing the retransmission mechanism of SIP. Time-based simulation emulating the process of backup servers shows that the proposed system reduces the number of backup servers to less than 38% compared to the previous studies, without degrading the service quality.
ER -
English
