Reliable and Scalable DHT-Based SIP Server Farm

Session Initiation Protocol has been widely deployed to enable multimedia communication. To guarantee service reliability and scalability, service providers usually deploy SIP server farms. In this paper, the authors present a reliable and scalable DHT-based SIP server farm. In the proposed server farm, one-hop DHT is adopted and a new SIP event package called SIEP (Server Information Event Package) is designed. In addition, a novel load sharing and failover scheme is designed based on one-hop DHT and SIEP. Compared with multi-hop DHT, one-hop DHT produces less overhead in DHT-based SIP server farm.