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This paper, in accordance with the authors' continuing research investigates the effect of adding extra servers in Session Initiation Protocol (SIP) signaling network on session setup delay in the IP Multimedia Subsystem (IMS). The effect of applying more than one server in reducing waiting time in each of the nodes of the system is previously investigated by the authors in and applying more servers...
In this paper, we perform experiments on interoperability testing of presence service on IMS platform. Open source implementations such as an IMS platform, a presence server, an XCAP server, and IMS clients are deployed to establish testbed for interoperability testing of presence service. Test cases for SIMPLE presence protocol developed by OMA are applied to our testbed and test results are analyzed...
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