Panda G.Banik A.D.Chaudhry M.L.2025-02-172017http://dx.doi.org/10.1080/03610926.2016.1186192https://idr.iitbbs.ac.in/handle/2008/1358We consider an infinite buffer single server queue wherein batch interarrival and service times are correlated having a bivariate mixture of rational (R) distributions, where R denotes the class of distributions with rational Laplace�Stieltjes transform (LST), i.e., ratio of a polynomial of degree at most n to a polynomial of degree n. The LST of actual waiting time distribution has been obtained using Wiener�Hopf factorization of the characteristic equation. The virtual waiting time, idle period (actual and virtual) distributions, as well as inter-departure time distribution between two successive customers have been presented. We derive an approximate stationary queue-length distribution at different time epochs using the Markovian assumption of the service time distribution. We also derive the exact steady-state queue-length distribution at an arbitrary epoch using distributional form of Little�s law. Finally, some numerical results have been presented in the form of tables and figures. � 2017 Taylor & Francis Group, LLC.enCross-correlationdistributional Little�s lawidle periodsinter-departure timePad� approximationqueue lengthvirtual and actual waiting timesArticle