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Comparison of loss-based overload control mechanisms in signaling system with SIP protocol

In this paper we compare two approaches for loss-based overload control mechanisms in signaling system with SIP protocol, hop-by-hop and end-to-end. Both discussed mechanisms are based on using a simple non-preemptive priority queueing scheme in SIP server. The effectiveness of both approaches is compared with the system with no overload control. The effectiveness of the solution is measured by average call setup time, goodput and basic fairness.