Efficient Dispatcher Mechanism for SIP Cluster Based on Memory Utilization

Session Initiation Protocol (SIP) has a promise future in real time communication, it is known to be highly efficient protocol found to provide desired services in multimedia communication (voice and video). In production, SIP service providers have to provide services for millions of clients and able to handle thousands of concurrent calls efficiently. That can be achieved through a wide scale of cluster SIP servers with high control level. However, poor management of resource utilization considered to be a serious issue in SIP infrastructure, especially for high call traffic distribution. This paper proposed a mechanism called SIP-Cluster Memory Utilization (SIP-CMU) which distributes SIP calls in cluster based on memory utilization to ensure better resource allocation. The mechanism makes use of NoSQL cache system to update cluster nodes memory status. Evaluation have been conducted by applying high load traffic in variant scenarios. In sum, results have shown that the proposed mechanism performs efficiently against other load-balancing mechanism by insuring a wised resource utilization such as bandwidth and CPU.