The 3G IP Multimedia Subsystem (IMS): Merging the Internet and the Cellular Worlds, Second Edition
The 3G IP Multimedia Subsystem (IMS): Merging the Internet and the Cellular Worlds, Second Edition
Initial simulation results that analyze SIP based VoIP networks under overload
ITC20'07 Proceedings of the 20th international teletraffic conference on Managing traffic performance in converged networks
Characterizing session initiation protocol (SIP) network performance and reliability
ISAS'05 Proceedings of the Second international conference on Service Availability
Modeling and simulation of SIP tandem server with finite buffer
ACM Transactions on Modeling and Computer Simulation (TOMACS)
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IP Multimedia Subsystem (IMS) provides a common control layer over which the services can be easily accessed by fixed and mobile users. In order to guarantee performance to both service providers and end service subscribers, careful management and maintenance within the control layer must be fulfilled. In this paper, we propose a solution that utilizes a controlling entity to track the utilization of hotspot Session Initiation Protocol (SIP) server (i.e., S-CSCF) and to initiate de-registration procedure so that a sufficient number of subscribers at the overloaded S-CSCF are re-associated with the other S-CSCF(s) for subsequent session services. The proposed solution redistributes and smoothes the future traffic load over individual S-CSCF in an automatic manner. The goodness of the proposal is assessed through simulations using OPNET.