Approximation of M/G/c Retrial Queue with M/PH/c Retrial Queue Shin, Yang-Woo; Moon, Dug-Hee;
The sensitivity of the performance measures such as the mean and the standard deviation of the queue length and the blocking probability with respect to the moments of the service time are numerically investigated. The service time distribution is fitted with phase type(PH) distribution by matching the first three moments of service time and the M/G/c retrial queue is approximated by the M/PH/c retrial queue. Approximations are compared with the simulation results.
M/G/c retrial queue;phase type distribution;sensitivity;approximation;simulation;