A Lightweight Spectrum Occupancy and Service Time Model for Centralized Cognitive Radio Networks
| العنوان: | A Lightweight Spectrum Occupancy and Service Time Model for Centralized Cognitive Radio Networks |
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| المؤلفون: | Bakht Zaman, Frank Y. Li, Ziaul Haq Abbas |
| المصدر: | Wireless Personal Communications. 92:1675-1694 |
| بيانات النشر: | Springer Science and Business Media LLC, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Service (business), Queueing theory, 021103 operations research, business.industry, Computer science, 0211 other engineering and technologies, 020206 networking & telecommunications, 02 engineering and technology, Interference (wave propagation), Computer Science Applications, Task (computing), Cognitive radio, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, business, Queue, Computer network, Communication channel |
| الوصف: | In cognitive radio networks (CRNs), secondary users (SUs) exploit the unused or sparsely used spectrum by primary users (PUs) without causing any harmful interference. Consequently, spectrum occupancy modeling appears as an essential task for CRN operations. In this paper, spectrum occupancy has been modeled using a queueing theory based approach in order to analyze the performance of CRNs in terms of network capacity, number of cognitive radio users waiting for service, and average waiting time. A compact model is presented for a CRN, where the queue adopted has variable service capacity and can be considered as a multi-service queue with server failure where each channel acts as a server. When a channel is occupied by a PU, it is regarded as a server failure for SUs. Using the probability generating function, the closed-form expressions of various performance parameters for different arrival distributions are derived. Numerical results for the remaining services for SUs, the expected number of SUs, and average waiting time as the CRN capacity, average service demands and average arrival rate vary, are illustrated. |
| تدمد: | 1572-834X 0929-6212 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::2f9f49b9b7a155485e7db8e572cea5ef https://doi.org/10.1007/s11277-016-3628-7 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........2f9f49b9b7a155485e7db8e572cea5ef |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 1572834X 09296212 |
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