M.T. Alam and Z.D. Wu (Australia)
SIP, IMS and Mobile IP
The existing session establishment scenario of IP Multimedia Subsystem (IMS) suffers from triangular routing for a certain period of time when an end SIP user or terminal is mobile. In this paper, the performance of three possible session establishment scenarios in a mobile environment are investigated by using an analytical model. The model is developed based on the expressions of cost functions, which may represent system delay and overhead involved in sessions establishment. Finally, some numerical results are demonstrated which provides useful insights into the system behaviour.
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