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In this paper, the impact of dependent failures of optical links on the availability of the optical network is analyzed using Monte Carlo simulation. Simulation is used because analytical approach to availability calculation is too complex when there are dependencies between failures. Availability model is described and used in two case studies: ring topology and several functional structures of two...
The IP Multimedia Subsystem (IMS) is a standardized architectural framework for the provision of multimedia services over a packet based next generation network (NGN). We present an overview of IMS, with emphasis on use of IMS application servers and enablers for service delivery, and show how an innovative prototype service can be designed and developed based on principles of service composition...
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