On TCP-based SIP Server Overload Control

Charles Shen & Henning G. Schulzrinne
SIP server overload management has attracted interest recently as SIP becomes the core signaling protocol for Next Generation Networks. Yet virtually all existing SIP overload control work is focused on SIP-over-UDP, despite the fact that TCP is increasingly seen as the more viable choice of SIP transport. This paper answers the following questions: is the existing TCP flow control capable of handling the SIP overload problem? If not, why and how can we make it...
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