Flow Management for SIP Application Servers

—In this paper, we study how to build a front-end flow management system for SIP application servers. This is challenging because of some special characteristics of SIP and SIP applications. 1) SIP flows are well organized into sessions. The session structure should be respected when managing SIP flows. 2) SIP has been adopted by telecom industry, whose applications have more critical QoS requirements than WEB ones. 3) SIP message retransmissions exacerbate the overload situation in case of load bursts; moreover, they may trigger persistent retransmission phenomenon, which retains large response times even after the original burst disappears. To address the combination of these challenges, we propose a novel front-end SIP flow management system FEFM. FEFM integrates concurrency limiting, message scheduling and admission control to achieve overload protection and performance management. It also devises some techniques such as response time prediction, twin-queue scheduling, and retran...

• Type: Conference
• Year: 2007
• Where: ICC
• Authors: Jing Sun, Jinfeng Hu, Ruixiong Tian, Bo Yang
• Keywords: Communications, ICC 2007, Persistent Retransmission Phenomenon, Sip Applications, Sip Flow