… ; second, we perform an availability analysis devoted at identifying the optimal redundant …
availability requirements (5.26 minutes of downtime per year), along with a sensitivity analysis …

… availability analysis relies on a hierarchical decomposition based on two complementary
system … ; ii) SRN to characterize single CNRs availability, by modeling all its layers and their …

… It is the case of [6] where an availability analysis of a virtualized EPC is … an availability
analysis aimed at identifying the optimal redundant configuration satisfying the high availability …

… 4 AVAILABILITY MODEL In this work, the system availability analysis is performed by
considering a three-level hierarchical model (Trivedi et al. 2006) that combines various formalisms. …

… • We face an availability analysis and evaluation of softIMS by exploiting the Stochastic
Reward Networks (SRN) technique to deal either with common mode failures (due to a nested …

… CONCLUSIONS In this work we introduced a tool useful to manage the availability of service
chains, where the example of virtualized IP Multimedia Subsystem (vIMS) has been tackled. …

… , a joint analysis of availability and performance (aka performability) of IP Multimedia Subsystem,
… (OptChains+), we carry on a performability analysis: i) to evaluate and compare series/…

… 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 steady-state availability not less than 0.99999, and we provide a sensitivity analysis
useful to evaluate the system robustness to variation of parameters from their nominal values. …

… 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, …