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Analytical modeling of multiservice packet network core with estimation of delay and jitter characteristics. Modeling is based on open queuing network with heterogeneous request flow with tree relative priority classes, reflected serving of tree considered traffic types in MPLS-network (Data over IP, IPTV, Voice over IP). One of the top important problems for telecom operators is providing of required Quality of Service (QoS) in packet switching backbone called Multiservice Networks (MN) for the different traffic types, especially for voice. To provide required QoS at design stage of MN planning could be used imitation modeling in the different software environments like GPSS World.
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