Information Technologies and Mathematical Modelling. Queueing Theory and Applications 18th International Conference, ITMM 2019, Named after A.F. Terpugov, Saratov, Russia, June 26–30, 2019, Revised Selected Papers

Duration between Events in Correlated Semi-synchronous Event Flow of the Second Order by the Method of Moments.- Special retrial queues with state-dependent input rate.- Redundant Queueing System with Hysteresis Backup Server Connection Strategy.- The laws of conservation of ?ows in acyclic queueing networks.- Performance Analysis and Optimal Control for Queueing System with aReserve Unreliable Server Pool.- Study of a service process by a loop algorithm by means of a stopped random walk.- Resource queueing system MMP P (2,?)|GI2| with parallel service of multiple paired customers.- Modelling of Virtual Radio Resources Slicing in 5G Networks.- A multiphase queueing model for performance analysis of a multi-hop IEEE 802.11 wireless network with DCF channel access.- Single Server Queues with Batch Poisson Input and Multiple Types of Outgoing Calls.- Re?ned Approximate Algorithm for Steady-State Probabilities of the Large Scale Queuing Systems with Instantaneous and Delayed Feedback.- Estimation of the Probability Density Parameters of the Interval Duration between Events in Correlated Synchronous Generalized Flow of the Second Order.- On a two-server queue with consultation in random environment.- Asymptotic Analysis of Retrial Queueing System M/GI/1 with Collisions and Impatient Calls.- Production Inventory System with PositiveService Time under Local Purchase.- On the Total Amount of the Occupied Resources in the Multi-resource QS with Renewal Arrival Process.-  Simulation of ?nite-source retrial queues with two-way communications to the orbit.- On the Geo/G/1 System.- Methods to Reduce Loss Probability in Systems with In?nite Service Time Dispersion.- On a queue with postponed work under N-policy.