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This paper evaluates the performance of IMS-Based PoC service over three typical wireless access environment, such as GPRS, UMTS/WCDMA and WLAN/802.11. The contributions of this paper are: developing a NS2-based simulation platform with multiple wireless access environments which can be taken as a general platform for study; proposing a series-connected M/M/l queuing model to simulate the call processing delay of IMS entities; simulating and analyzing the call establishment delay of PoC sessions over GPRS, UMTS/WCDMA and WLAN. The simulation results can conduct the deployment of the real PoC system and evaluate the feasibility of performance optimization schemes for both network and services.
Date of Conference: 24-26 Sept. 2009