Performance analysis of centralized dynamic spectrum access via channel reservation mechanism in cognitive radio networks

Azaly, Nehal M. El; Badran, Ehab F.; Kheirallah, Hassan Nadir; Farag, Hania H.

doi:10.1016/j.aej.2020.11.018

Cited by 15 publications

(3 citation statements)

References 22 publications

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“…A priority-based spectrum reservation is proposed in [19], wherein a control channel is solely reserved for SUs. Likewise, a spectrum reservation scheme and cooperative communication are considered in [20]. The authors in [21] present a novel medium access control protocol and a reservation scheme for distributed single-channel CRNs.…”

Section: B Related Workmentioning

confidence: 99%

Toward Spectrum Efficiency and Reliability for Heterogeneous Users in CR-Enabled Social Internet of Things

Khan,

Tanveer,

Shin

et al. 2023

IEEE Access

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Cognitive radio enabled social internet of things (CR-SIoT) can potentially revolutionize the existing networking paradigm by enabling heterogeneous IoT users to communicate socially like friends using the existing limited spectrum. However, satisfying the varying requirements of heterogeneous users in CR-SIoT remains a key challenge. Therefore, we propose a novel extended scheme, called ES, targeted at CR-SIoT with multi-priority and heterogeneous users. The scheme heuristically utilizes the secondary users' (SUs') heterogeneousness with respect to their priorities, methodically tackles SUs' dropping, and follows efficient approach for channel access. Moreover, the scheme considers the impact of receiver's accessibility for rendering realistic analysis. Aside from this, we propose a spectrum reservation algorithm for increasing spectrum utilization. Leveraging Markov chain, we model the network and derive expressions for capacity, blocking probability (BP), spectrum utilization, and handoff probability (HP). We evaluate the scheme under various users' arrival and service rates, and observe 74% improvement in capacity, 26% in spectrum utilization, 88% in HP, 43% in BP, and significant fairness in service availing among users, compared to the state-of-the-art. Additionally, we gain valuable insights by studying the inherent tradeoff between BP and service retainability resulting from the spectrum reservation.

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Section: B Related Workmentioning

confidence: 99%

Toward Spectrum Efficiency and Reliability for Heterogeneous Users in CR-Enabled Social Internet of Things

Khan,

Tanveer,

Shin

et al. 2023

IEEE Access

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“…Mechanism Description. Figure 1 shows the architecture of a centralized cognitive radio network [12] considered in this paper.…”

Section: System Modelmentioning

confidence: 99%

“…To increase the transmission efficiency of SUs, some scholars begin to focus on channel reservation. In [12], a coordinated channel reservation model for SUs was studied by using a Markov model. e system performance with and without reserved channels was compared, and the effect of the number of reserved channels on system efficiency was analyzed.…”

Section: Introductionmentioning

confidence: 99%

A Multichannel Allocation Strategy Based on Preemption Threshold and Preemption Probability in Cognitive Radio Networks

Zhao

Xiang

2021

Mobile Information Systems

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In traditional multichannel cognitive radio networks (CRNs), users are split into two different priorities. Because of the low priority of secondary users (SUs), SU packets’ transmissions are easily interrupted by primary users (PUs). In this paper, two control parameters, called preemption threshold H and preemption probability q, are used to regulate the preemption behavior of PU packets to improve the transmission performance of SU packets. When all channels in the system are occupied, the preemption behavior of PU packets will be adjusted according to the amount of SU packets that are transmitting in the system. If the amount is larger than H, the recently arrived PU packet either preempts a channel with probability q or leaves the system with probability 1 − q . The central controller manages the system’s channel usage right and determines a series of access behaviors of user packets. Considering the possible imperfect sensing, a discrete-time queueing model is developed with the proposed preemption control mechanism. Then we obtain some performance index expressions of PU and SU packets founded on the system’s state transition matrix and make the corresponding performance figures through numerical experiment. Finally, we construct a system utility function and determine the optimal preemption threshold and preemption probability through the seagull optimization algorithm (SOA). Experimental data show that the proposed mechanism by setting preemption threshold and preemption probability can significantly reduce SU packets’ outage rate and improve SU packets’ throughput rate.

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Transient analysis of enhanced hybrid spectrum access for QoS provisioning in multi-class cognitive radio networks

Kulshrestha,

Goel,

Balhara

2024

Wireless Netw

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Performance analysis of centralized dynamic spectrum access via channel reservation mechanism in cognitive radio networks

Cited by 15 publications

References 22 publications

Toward Spectrum Efficiency and Reliability for Heterogeneous Users in CR-Enabled Social Internet of Things

Toward Spectrum Efficiency and Reliability for Heterogeneous Users in CR-Enabled Social Internet of Things

A Multichannel Allocation Strategy Based on Preemption Threshold and Preemption Probability in Cognitive Radio Networks

Transient analysis of enhanced hybrid spectrum access for QoS provisioning in multi-class cognitive radio networks

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