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In the proposed work, if one service provider is found to be overloaded, it utilizes the spectrum of the other service provider which is found to be underutilized. Thus, CR nodes senses the best available channel for sharing and it provides the list of available channels to the overloaded service provider to utilize the under utilized spectrum efficiently. Spectrum sharing among service providers improve the spectral efficiency, probability efficiency of sensing and reduces the call blockage. If the number of service providers are increased to share the spectrum, this would reduces the high traffic patterns of the calls.
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