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 Networks. SIP servers are configured with a specific overload control configuration. When the SIP messages are loaded on servers more than its capacity, overload will be experienced by the servers. The overload control methods are widely developed by many research scholars to withstand against the overloaded messages on SIP servers. The proposed paper examines the predominant Overload Control Methods suggested by different research scholars are compared here and distinguishes the most powerful method among them. In this experimental results comparison, the overload control methods suggested by Luca De Cicco, Member, IEEE, Giuseppe Cofano, and Saverio Mascolo, Senior Member, IEEE, Masataka Ohta and Abdullah Akbar et.al have been compared and distinguished the most effective and powerful method among them. In this paper Cooperative Overload Control Algorithm for SIP overload control method has been proved conclusively to be better than other methodologies. Keywords— SIP Servers, Multimedia Communication Sessions, Overload Control Methods.