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Real-Time Resource Availability Signaling in IP Multimedia Subsystem Networks

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ABSTRACT
IP Multimedia Subsystem (IMS) allows the use of unlicensed, non-dedicated and nondeterministic access networks for delivering IP multimedia services. Providing end-to-end Quality-of-Service (QoS) for resource demanding real-time services (e.g. real-time multimedia) over such networks is a challenging task due to varying resource availability of the network and the end-device during a single session . A common solution to this problem is adapting service quality and type according to availability of system resources, which requires end-to-end monitoring and signaling of resource availability during a single session. This paper presents an extension of the IMS architecture for real-time resource availability monitoring and signaling. The novelty of the proposed extension is twofold. It takes into account uncon-trolled access networks with no resource reservation on the one hand, and end devices on the other. Two system archi-tecture components are introduced for monitoring and signaling of the real-time resource availability in both networks (e.g. bandwidth, buffer space), and end-devices (e.g. battery, CPU, memory, storage), namely a Resource Manager (RM) and a Resource Availability Server (RAS). Our solution does not require any modifications of the IMS architec-ture and can be implemented as a plug-in.
 
Cite this paper
T. Ozcelebi, I. Radovanovic and D. Sengupta, "Real-Time Resource Availability Signaling in IP Multimedia Subsystem Networks," Journal of Service Science and Management, Vol. 1 No. 2, 2008, pp. 128-134. doi: 10.4236/jssm.2008.12013.
 
References
[1]R. Yavatkar, D. Pendarakis and R. Guerin, “A Framework for Policy-based Admission Control,” RFC 2753, IETF Network Working Group, http://www.ietf.org/rfc/rfc2753.txt, January 2000.
 
[2]R. Braden, L. Zhang, S. Berson, S. Herzog and S. Jamin, “Resource ReSerVation Protocol (RSVP), “ RFC 2205, IETF Network Working Group, http://www.ietf.org/rfc/rfc2205.txt, September 1997.
 
[3]D. Awduche, A. Chiu, A. Elwalid, I. Widjaja and X. Xiao, “Overview and Principles of Internet Traffic Engineer-ing,” RFC 3272, IETF Network Working Group, http://www.ietf.org /rfc/rfc3272.txt, May 2002.
 
[4]http://www.itu.int/ITU-T/ngn/index.phtml.
 
[5]Digital Cellular Telecommunications System (Phase 2+), Universal Mobile Telecommunications System (UMTS), IP Multimedia Subsystem (IMS), Stage 2, V7.6.0, TS 23.228, 3GPP, December 2006.
 
[6]http://www.3gpp.org
 
[7]J. Rosenberg, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley and E. Schooler, “SIP: Session Ini-tiation Protocol,” RFC 3261, IETF Network Working Group, http://www.ietf.org/rfc/rfc3261.txt, June 2002.
 
[8]http://www.comet-consortium.org
 
[9]S.I. Maniatis, E.G. Nikolouzou and I.S. Venieris, “End-to-End QoS Specification Issues in the Converged All-IP Wired and Wireless Environment, “ IEEE Communica-tions Magazine, vol. 42, no. 6, pp. 80-86, June 2004.
 
[10]S. Chia,“The Universal Mobile Telecommunication Sys-tem, “ IEEE Communications Magazine, vol. 30, no. 12, pp. 54-62, December 1992.
 
[11]S. Blake, D. Black, M. Carlson, E. Davies, Z. Wang and W. Weiss, “An Architecture for Differentiated Services, “ RFC 2475, IETF DiffServ Working Group, http://www.ietf.org /rfc/rfc2475.txt, December 1998.
 
[12]R. Braden, D. Clark and S. Shenker, “Integrated Services in the Internet Architecture: an Overview, “RFC 1633, IETF Network Working Group, http://www.ietf.org/rfc/rfc1633.txt, June 1994.
 
[13]M. Handley and V. Jacobson, “SDP: Session Description Protocol,” RFC 2327, IETF Network Working Group, http://www.ietf.org/rfc/rfc2327.txt, April 1998.
 
[14]G. Camarillo, W. Marshall and J. Rosenberg, "Integration of Resource Management and Session Initiation Protocol (SIP)", RFC 3312, October 2002.
 
[15]Y. Nomura, R. Walsh, J-P. Luoma, H. Asaeda and H. Schulzrinne, "A Framework for the Usage of Internet Me-dia Guides (IMGs)", RFC 4435, April 2006.
 
[16]M.Westerlund, "A Transport Independent Bandwidth Modifier for the Session Description Protocol (SDP)", RFC 3890, September 2004.
 
[17]S.Casner, "Session Description Protocol (SDP) Bandwidth Modifiers for RTP Control Protocol (RTCP) Bandwidth", RFC 3556, July 2003.
 
[18]F. Andreasen, "Session Description Protocol (SDP) Sim-ple Capability Declaration", RFC 3407, October 2002.
 
[19]F. De Vito, T. Ozcelebi, O. Sunay, M. Tekalp, R. Civanlar and J. C. De Martin, “Per-GOP Bitrate Adaptation for H.264 Compressed Video Sequences,” in L. Atzori et al. (Eds.): LNCS 3893, pp. 198-206, Springer-Verlag Berlin Heidelberg 2006.
 
[20]D. Vingarzan, P. Weik, T. Magedanz, “Design and Im-plementation of an Open IMS Core,” in T. Magedanz et al. (Eds.) LNCS 3744, pp. 284-293, Springer-Verlag Berlin Heidelberg 2005.            eww150211lx
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