A Critical Evaluation of the IMS Presence Service
نویسندگان
چکیده
The IP Multimedia Subsystem (IMS) defined by the 3rd Generation Partnership Projects (3GPP) is a standardized architecture for the Next Generation Network. In this paper, we provide an insight into the presence service, one of the fundamental building blocks of the IMS. Our prototype-based study is unique of its kind and helps identifying the factors which limit the scalability of the current version of the presence service, which will in turn dramatically limit the performance of advanced IMS services relying on presence information. We argue that the client-server paradigm behind the current IMS architecture does not suite the requirements of the IMS system, which defies the very purpose of its introduction. We finally elaborate on possible avenues for addressing this problem.
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