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Cognitive radio nodes have been proposed as means to improve the spectrumutilization. It reuses the spectrum of a primary service provider under thecondition that the primary service provider services are not harmfullyinterrupted. A cognitive radio can sense its operating environment's conditionsand it is able to reconfigure itself and to communicate with other counterpartsbased on the status of the environment and also the requirements of the user tomeet the optimal communication conditions and to keep quality of service (QoS)as high as possible. The efficiency of spectrum sharing can be improved byminimizing the interference. The Utility function that captures the cooperativebehavior to minimize the interference and the satisfaction to improve thethroughput is investigated. The dynamic spectrum sharing algorithm can maintainthe quality of service (QoS) of each network while the effective spectrumutilisation is improved under a fluctuation traffic environment when theavailable spectrum is limited.

Performance Evaluation of QoS Parameters in Dynamic Spectrum Sharing for Heterogeneous Wireless Communication Networks