Abstract
A discrete-time GI/G/1 retrial queue with Bernoulli retrials and time-controlled vacation policies is investigated in this paper. By representing the inter-arrival, service and vacation times using a Markov-based approach, we are able to analyze this model as a level-dependent quasi-birth-and-death (LDQBD) process which makes the model algorithmically tractable. Several performance measures such as the stationary probability distribution and the expected number of customers in the orbit have been discussed with two different policies: deterministic time-controlled system and random time-controlled system. To give a comparison with the known vacation policy in the literature, we present the exhaustive vacation policy as a contrast between these policies under the early arrival system (EAS) and the late arrival system with delayed access (LAS-DA). Significant difference between EAS and LAS-DA is illustrated by some numerical examples.
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Research supported by the National Natural Science Foundation of China (Grant Nos. 10871020 and 11171019), Program for New Century Excellent Talents in University (No. NCET-11-0568) and the Fundamental Research Funds for the Central Universities (Nos. 2011JBZ012 and 2013JBZ019).
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Wang, Jt., Wang, N. & Alfa, A.S. Discrete-time GI/G/1 retrial queues with time-controlled vacation policies. Acta Math. Appl. Sin. Engl. Ser. 29, 689–704 (2013). https://doi.org/10.1007/s10255-013-0244-0
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DOI: https://doi.org/10.1007/s10255-013-0244-0
Keywords
- discrete queues
- retrial queues
- time-controlled vacations
- early and late arrival systems
- matrixanalytic method