Local SIP Overload Control
نویسندگان
چکیده
The Session Initiation Protocol (SIP) is a signaling framework that allows two or more parties to establish, alter, and terminate various types of media sessions. The mechanism employed by the standard SIP is not e ective in handling overload situations that occur when the incoming ow of requests overcomes the processing resources of the server. In this paper we present a local overload control system based on feedback control theory. The algorithm has been implemented in Kamailio (OpenSER) and a performance comparison with Ohta and Occupancy (OCC) overload control algorithms has been performed. The proposed control system e ciently counteracts overload situations providing a goodput which is close to the optimal while maintaining low call establishment delays and retransmission ratios. On the other hand, Ohta and OCC algorithms provide higher call establishment delays and retransmission ratio and lower goodputs.
منابع مشابه
Local vs. Distributed - An experimental comparative analysis of divergent overload control methods in SIP Server
The advent of Internet telephony has unleashed the new era in unlimited multimedia and voice calls between globally spread users of Voice over Internet Protocol. Session Initiation Protocol is playing predominant role for signalling and controlling multimedia communication sessions. SIP can facilitate the sessions for audio, video conferencing, interactive gaming and call forwarding in IP Netwo...
متن کاملبهبود کارایی پروتکلSIP در شرایط اضافه بار با استفاده از قابلیت مبتنی بر پنجره
The extent and diversity of systems provided by IP networks have made various technologies to approach integrating various types of access networks and converting to next generation network. The Session Initiation Protocol (SIP) with respect to facilities such as being in text form, end-to-end connection, independence from the type of transmitted data, and supporting various forms of transmissi...
متن کاملInternet Engineering Task Force (ietf) Session Initiation Protocol (sip) Overload Control
Overload occurs in Session Initiation Protocol (SIP) networks when SIP servers have insufficient resources to handle all the SIP messages they receive. Even though the SIP protocol provides a limited overload control mechanism through its 503 (Service Unavailable) response code, SIP servers are still vulnerable to overload. This document defines the behavior of SIP servers involved in overload ...
متن کاملA Comparative Study of SIP Overload Control Algorithms
Recent collapses of SIP servers in the carrier networks indicates two potential problems of SIP: (1) the current SIP design does not easily scale up to large network sizes, and (2) the built-in SIP overload control mechanism cannot handle overload conditions effectively. In order to help carriers prevent widespread SIP network failure effectively, this chapter presents a systematic investigatio...
متن کاملOn TCP-based Session Initiation Protocol (SIP) Server Overload Control
The Session Initiation Protocol (SIP) server overload management has attracted interest since SIP is being widely deployed in the Next Generation Networks (NGN) as a core signaling protocol. Yet 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: ...
متن کامل