Dynamic spectrum access (DSA) emerging as an effective way of improving the utilization of the scarce spectrum has attracted great attention in the communication field. A key challenge in DSA is to perform an efficient spectrum sensing and sharing mechanism. In this paper. aiming at achieving a maximal spectrum utilization. https://www.sukrensi.com/flash-sale-Ribavirin-500MG-R0077-500MG-p9633-big-savings/