SIP Offload Engine for Accelerating J2EE Based SIP Application Server

J2EE based SIP application server is a scalable middleware for containing and managing SIP application. In this paper, a kind of SIP accelerator named SIP offload engine (SOE) is presented to improve server performance through offloading SIP message parsing, SIP transaction processing, security and transport layer connections management. The SIP application can be deployed on SOE enabled SIP application server without any modification. The benchmarking results on typical SIP application scenario indicate that the throughput of SIP application server can be improved significantly. Furthermore SOE can be used as high performance HTTP and SIP converged proxy server.