Session Initiation Protocol (SIP) Server Overload Control: Design and Evaluation
Principles, Systems and Applications of IP Telecommunications. Services and Security for Next Generation Networks
Initial simulation results that analyze SIP based VoIP networks under overload
ITC20'07 Proceedings of the 20th international teletraffic conference on Managing traffic performance in converged networks
A distributed end-to-end overload control mechanism for networks of SIP servers
Computer Networks: The International Journal of Computer and Telecommunications Networking
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Overload happens in Session Initiation Protocol (SIP) networks when SIP servers have insufficient resources to handle all messages they receive. Under overload, SIP networks suffer from congestion collapse due to its ineffective overload control mechanism. In this paper we propose a backpressure-based SIP overload control mechanism called Bassoon. It consists of two parts: the first part is a provably optimal load balancing algorithm that ensures full utilization of the available network resources. The second part is an end-to-end load control algorithm that intelligently throttles excessive traffic at the edge of the network. We show that, by combining optimal load balancing and end-to-end load control, Bassoon effectively controls overload in SIP networks and outperforms existing schemes in terms of goodput, fairness and responsiveness.