Availability Prediction of Telecommunication Application Servers Deployed on Cloud

Availability and reliability considerations are discussed in this paper with special focus on ‘cloud based’ Mobile Switching and Telecommunication Application Servers (MSS and TAS). Before the extensive deployment of cloud based telecommunication networks, the essential question shall be answered: Will cloud technology ensure the ‘carrier grade’ requirements that are well established and proven on ‘legacy telecommunications’ hardware? This paper shows the possible redundancy principles and a simulation method to predict availability for ‘cloudified’ mobile communication network elements. As a calculation example, Nokia AS on ‘telco-cloud’ is presented, that combines several redundancy principles such as full protection (2N), standby and load sharing.