Parameter Estimation of Mt/M/1/K Queueing Systems With Utilization Data
Parameter Estimation of Mt/M/1/K Queueing Systems With Utilization Data
复制标题
利用利用率数据对 Mt/M/1/K 排队系统进行参数估计
DOI:
10.1109/access.2019.2906796
复制
发表时间:
2019
期刊:
影响因子:
3.9
通讯作者:
T. Dohi
中科院分区:
文献类型:
--
作者:
C. Li;H. Okamura;T. Dohi
Utilization data are defined as the time series data consisting of time fractions of busy periods in fixed time intervals and are practically used to represent server conditions, such as CPU utilization. In general, it is more challenging to estimate the model parameters from the utilization data since we do not know the exact job arrival time and the service time from the utilization data. In this paper, we consider an approach to estimate the model parameters from the utilization data by assuming a few model assumptions. In particular, we suppose an Mt/M/1/K queueing system whose job arrival follows a Non-homogeneous Poisson Process (NHPP) and propose a parameter estimation method for the NHPP approximately from the utilization data based on the maximum likelihood estimation (MLE) via the expectation maximization (EM) algorithm. In numerical experiments, we generate the simulated utilization data of an Mt/M/1/K queueing system and investigate the effectiveness of our method. Also, we use the real CPU utilization data to exhibit the performance evaluation.