Discrete and Continuous Models and Applied Computational ScienceDiscrete and Continuous Models and Applied Computational Science2658-46702658-7149Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)8250Research ArticleEvaluation of IPTV Service Session Setup TimeGaidamakaY VTelecommunication Systems Departmentygaidamaka@mail.ruZaripovaE RTelecommunication Systems Departmentezarip@sci.pfu.edu.ruPeoples’ Friendship University of Russia150120141232908092016Copyright © 2014,2014This paper describes an algorithm for evaluation of SIP session set up time for IPTV services based on IMS as open mixed BCMP network. We suggest a model of IPTV network composed of seven functions. To evaluate session set up time we design a call ﬂow diagram between STB and MS. First of all we determine call ﬂow rate for a BCMP network and after that use decomposition and aggregation methods to estimate the service time for each function. We calculate session set up time as sum of all service intervals. A mathematical model of the open exponential queuing network is designed to estimate mean session set up time. We also suggest a numerical experiment for the algorithm with the initial data close to the real one. According to the initial data expected session set up time amounts by 2 seconds which is corresponded to the international standards.IPTVIMSIPTVBCMP networkIMSsession set up timemathematical modelвремя установления соединениясеть BCMPматематическая модель