Automated Generation of Availability Models for SFCs: The case of Virtualized IP Multimedia Subsystem

摘要: The reputation of network providers strongly depends on their ability to guarantee high performance levels virtualized infrastructures, and maintain strict Quality-of-Service (QoS) requirements, thus, the concept "five nines" or availability (HA) is critical. It means that, average, continuity a provided service cannot be violated for more than about five minutes per year. In this direction, we propose framework useful design model, from HA perspective, Service Function Chains (SFCs) whose chained software logic embodied in many softwarized telco infrastructures (e.g. IP Multimedia Subsystem elected here as representative use case). proposed interacts with TimeNET tool, offers interesting functionalities such as: i) generating stochastic models SFCs based SRN (Stochastic Reward Nets) formalism; ii) deploying scenarios via drag-and-drop operations basic users, modifying underlying advanced users; iii) setting variety parameters (mean-time-to-failure/repair, software/hardware specs, redundancy, etc.); iv) presenting results tabular and/or graphical forms.