Analysis of Queueing System with Constant Service Time for SIP Server Hop-by-Hop Overload Control
Consideration is given to the analysis of queueing system M 2|D|1|R with bi-level hysteretic input load control that can model signalling hop-by-hop overload control mechanism for SIP servers described in RFC 6357. Bi-level hysteretic input load control implies that system may be in three states (normal, overloaded, blocking), depending on the total number of customers present in it, and upon each state change input flow rate is adjusted. New approach that allows fast computation of joint stationary probability distribution is proposed, expressions for important performance characteristics are given.
KeywordsSIP server hop-by-hop mechanism loss-based overload control constant service rate queueing model
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