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Issue No. 03 - May/June (2008 vol. 12)
ISSN: 1089-7801
pp: 40-51
Hechmi Khlifi , Ericsson Canada
Jean-Charles Gr?goire , National Institute of Scientific Research, Canada
The IP multimedia subsystem (IMS) defines a generic architecture to support communication services over a Session Initiation Protocol (SIP) infrastructure. In the IMS architecture, application servers host and execute the IMS service logic. These servers can be SIP application servers, open services architecture (OSA) application servers, or a customized applications for mobile networks using enhanced logic (Camel) service environment. Some technologies used in telephony and voice-over-IP (VoIP) application servers are also applicable to IMS application servers, but such servers have some unique requirements that could limit the extent to which these technologies can meet them.
IP multimedia subsystem, IMS, Session Initiation Protocol, SIP, application server, telephony, API

J. Gr?goire and H. Khlifi, "IMS Application Servers: Roles, Requirements, and Implementation Technologies," in IEEE Internet Computing, vol. 12, no. , pp. 40-51, 2008.
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