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The retrial queueing systems are characterized as a customer, arriving when all servers are busy, leaves the system, but after some time makes a demand to the service facility again. These models play a vital role in computer and telecommunication networks. For example, in a telephone system, a customer might receive a busy signal due to a lack of capacity. Such a customer is not allowed to queue, but will try their luck again after some random time. Between trials, the blocked customers join a pool of unsatisfied customers called ’orbit’.

international journal of scientific and innovative mathematical research

Transient Solution of M[x1],M[x2]/G1,G2/1 Retrial queueing system with Priority services, Modified Bernoulli Vacation, Bernoulli Feedback, Negative arrival, Breakdown, Delaying repair, Setup time and Balking