… their constitutive elements, with analyses ranging from optimal resource distribution of
virtualized multimedia nodes [29] to availability characterization of virtualized IMS deployments [30…

… In case of availability of the subscriber’s terminal to which the call is made, the gateway
corresponds to the Ringing message, which the proxy sends to the calling party. After a …

… A numerical example of availability analysis of an IMS-based signalling network is now …
given availability requirement, as described in ‘An SMM performability scheme’ and ‘Availability …

… As final results, we determine the optimal redundant vIMS configuration able to guarantee a
steady-state availability not less than 0.99999, and we provide a sensitivity analysis useful to …

NGN introduces the concept of fix-mobile convergence (FMC). NGN provides the IP multimedia
subsystem (IMS) as platform to converge the wire and wireless networks. It is open and …

IP Multimedia Subsystem (IMS) is widely considered as the main solution for the next generation
multimedia rich communication. In order to provide multi-level security service in IMS to …

… protocol Multimedia Subsystems (IMS) platform [2] … availability model is motivated by the
reliability models in the study [29]. Since the availability model is dependent on the availability …

… Multimedia Subsystem (dubbed cIMS) that we characterize in terms of performability, where,
performance and availability … : i) a “five nines” availability analysis of the whole cIMS chain, …

The IP Multimedia Subsystem (IMS) is a Next Generation Network (NGN) architecture that
provides a platform for integrated wireline, wireless and Internet services. Reliable operation …

… Jiang and Schulzrinne [8] studied the service availability of VoIP in the current internet. … In
this paper we presented one possibility of employing IMS client into IP multimedia subsystem …