Performance analysis of cognitive wireless retrial queueing networks with admission control for secondary users.

Autor: Krishna Kumar, B., Navaneetha Krishnan, R., Sankar, R., Rukmani, R.
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Zdroj: Quality Technology & Quantitative Management; Sep2023, Vol. 20 Issue 5, p633-670, 38p
Abstrakt: This paper designs and analyzes a novel single-channel cognitive radio retrial queueing network wherein a waiting line buffer is deployed for secondary users (SUs). A finite source system generates the primary users (PUs). Apart from these, PUs having preemptive priority over SUs, the effect of retrial/repeated attempts of PUs is taken into consideration. In such a system, the stability condition and the joint steady-state probability distribution of PUs and SUs are studied by using the matrix-analytic method. Several performance metrics of interest, such as blocking probability, throughput, mean waiting time, etc., have been determined. The first-passage time to reach a congestion level in the SUs waiting line buffer and its related characteristics are investigated by employing the first-step principle. In addition, correlation coefficients for various events of SUs and PUs during this period have been assessed. Finally, extensive numerical results are presented graphically for the system insights. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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