RT Conference Proceedings T1 A Discrete-Time retrial queueing system with service upgrade A1 Fortes-Ruiz, Inmaculada A1 Sánchez, Sixto A1 Atencia-McKillop, Iván K1 Sistemas de tiempo discreto AB We study the Markov chain underlying the considered queueing system obtaining the gen- erating function of the number of customers in the orbit and in the system as well as the stationary distribution of the time that a customer spends in the server. We derive the stochastic decomposition law and as an application we give bounds for the proximity between the steady-state distributions for our queueing system and its corresponding standard system. YR 2015 FD 2015-06-10 LK http://hdl.handle.net/10630/9884 UL http://hdl.handle.net/10630/9884 LA eng NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 19 ene 2026