Efficient SIP Dispatcher Mechanism Based on Auto Scaling Processes

Recently, Session Initiation Protocol (SIP) involved as a core communication protocol in several technologies such as IMS, VoLTE and integrated with other applications. SIP known to be highly efficient protocol for providing high multimedia communication (voice and video) in industry and research society. In production, SIP service providers support millions of users and manage thousands of concurrent call-requests efficiently via a wide scale of cluster SIP servers. However, asynchronous processes-load among cluster nodes and weak resource utilization considered to be a serious issue in SIP technology, especially with high call-requests distribution. This paper proposes a dispatcher mechanism called SIP- Cluster Load Synchronization (SIP-CLS) which distributes SIP call-requests in cluster based on processes load utilization for efficient resource allocation. The mechanism takes advantage of NoSQL cache system to share and update cluster nodes load status. Evaluation have been conducted by torturing SIP server with high traffic in two different scenarios. As a results, the proposed mechanism performs efficiently compared to other load balancing mechanism by providing high resource utilization in term of bandwidth and CPU.