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Optimization of Spectrum Utilization in Cooperative Spectrum Sensing
1Department of Computer Engineering, Khwaja Fareed University of Engineering and Information Technology (KFUEIT), Rahim Yar Khan 64200, Pakistan. mohsin.ali@kfueit.edu.pk.
Sensors (Basel, Switzerland)
|April 26, 2019
Summary
This study analyzes how the number of secondary users and reporting bits impacts spectrum hole utilization in cognitive radio systems with cooperative sensing. More users and bits reduce available transmission time, lowering utilization probability.
Area of Science:
- Wireless Communications
- Spectrum Management
- Cognitive Radio
Background:
- Cognitive radio systems enable dynamic spectrum access.
- Cooperative spectrum sensing (CSS) enhances primary user detection.
- Fixed frame structures in practical systems create trade-offs.
Purpose of the Study:
- To develop an analytical framework for probability of spectrum hole utilization (PSHU).
- To analyze the impact of secondary user (SU) numbers and reporting bits on PSHU in CSS.
- To investigate the trade-off between sensing/reporting time and transmission time.
Main Methods:
- Analytical framework development for PSHU.
- Analysis of fixed frame structure in cognitive radio systems.
- Evaluation of soft cooperative spectrum sensing (CSS) parameters.
Main Results:
- Increased sensing and reporting durations reduce transmission time, lowering PSHU.
- Higher numbers of SUs and reporting bits increase reporting duration, negatively impacting PSHU.
- A trade-off exists between detection probability and PSHU.
Conclusions:
- The number of SUs and reporting bits significantly affects PSHU in fixed-frame cognitive radio systems.
- Optimizing SU coordination and reporting strategies is crucial for efficient spectrum utilization.
- Further research can explore adaptive frame structures to balance sensing and transmission needs.
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