QoS degradation based reimbursement for real-time cloud communication

Rapidly increasing digital media, specially multimedia content, has elicited the importance of cloud computing. Management and access of growing content becomes easy with cloud computing. Most of the cloud storage services now offer additional features related with multimedia management. For real-time communication (RTC), it is not always possible to maintain the quality of service (QoS), promised during service level agreement (SLA). When, for various reasons, a service is given up, the reimbursement is made on the standard mechanism, on the basis of utilized resources. This creates unfairness, since cloud consumer's satisfaction is very important to gain its loyalty. Service providers may lose their consumers if the resource management policy is not dynamic, according to the situations and scenarios. In this paper, we propose QoS degradation based reimbursement for given up services. We provide mathematical formulation to determine the effect of quality degradation, when SLA is violated, and calculate reimburse amount accordingly. Java/NetBeans was used to implement our work. The results show the effect of our model and its utility.