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IP Multimedia Subsystem

About: IP Multimedia Subsystem is a research topic. Over the lifetime, 4398 publications have been published within this topic receiving 43698 citations.


Papers
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Journal ArticleDOI
TL;DR: The IMSKAAP key exchange protocol is proposed and fit into the IMS session initiation procedure to achieve media plane end-to-end security and mitigates the impact of spam over IP telephony using mutual authentication, fulfilling the lawful interception requirement.

32 citations

Journal ArticleDOI
TL;DR: This IMS service framework can be used to implement new services, but its main strength might eventually be in its ability to seamlessly integrate existing services and deliver them to end-users in an optimized manner.
Abstract: While IMS was specified and is often presented as a fairly complex core network, it can also be perceived as a very powerful and simple service framework. This IMS service framework can be used to implement new services, but its main strength might eventually be in its ability to seamlessly integrate existing services and deliver them to end-users in an optimized manner.

32 citations

Journal ArticleDOI
TL;DR: This paper examines the role of presence information in IMS to provide personalized treatment of voice over Internet Protocol calls, multimedia sessions, and instant messaging interactions and proposes a generalized architecture that extends the presence concept to a broader class of context information.
Abstract: The IP Multimedia Subsystem (IMS) architecture enables a new class of converged, multimedia services for subscribers. This paper examines the role of presence information in IMS to provide personalized treatment of voice over Internet Protocol (VoIP) calls, multimedia sessions, and instant messaging (IM) interactions. This can be achieved with an IMS application server that interacts in a standardized way with IMS elements (S-CSCF and HSS) and other elements such as the MiLife™ presence server. In addition, we propose a generalized architecture that extends the presence concept to a broader class of context information. Based on selected use cases, we identify required presence and context attributes (e.g., source, real-time availability, and lifetime) and their characteristics. This paper also addresses how these attributes can be gathered, monitored, filtered, and stored efficiently using a hierarchical architecture. This includes incorporation of external presence and context information, such as emergency and enterprise calendar data, in a secure and privacy-sensitive manner.

32 citations

Patent
28 Feb 2002
TL;DR: In this paper, the authors propose an IP services switch that supports packetized voice traffic in the form of voice packets from a plurality of enterprises having a pluralityof endpoints some of which can use the same IP addresses.
Abstract: An IP services switch that supports packetized voice traffic in the form of voice packets from a plurality of enterprises having a plurality of endpoints some of which can use the same IP addresses. The IP services switch includes a plurality of NAT tables, each of which corresponds to a separate enterprise network for providing header and payload IP addresses which are unique to the services switch for the voice packets corresponding to each separate enterprise endpoint. A method of NAT in an intermediate service provider network for header and payload IP addresses in VoIP voice traffic packets is also provided.

32 citations

Journal ArticleDOI
TL;DR: A service architecture is proposed that integrates circuit based telecommunications with the Internet through the control elements of traditional and emerging networks, specifically the gatekeepers of VoIP and the SCPs of PSTN.
Abstract: The rapid evolution of Internet telephony has introduced new service implementation paradigms. The authors propose a service architecture that integrates circuit based telecommunications with the Internet through the control elements of traditional and emerging networks, specifically the gatekeepers of VoIP and the SCPs of PSTN.

32 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20235
202219
202124
202050
201971
201881