A cognitive radio based MAC protocol for Band 689~806 MHz
Jiang Fa · 2014
A cognitive radio based MAC protocol for 698~806MHz is presented in this paper to address user access issues in the environment where the broadcast system and cognitive radio system coexist.In this proposed scheme,the authorized bands is sensed in a distributed way,and the spectrum sensing information can be shared coordinately among secondary users.The unused authorized bands can be accessed by secondary users effectively in a competitive manner.Monte Carlo simulation method is used for scheme evaluation.Simulation results show that compared with the traditional algorithm,the proposed protocol can efficiently improve spectrum utilization rate in authorized frequency bands and therefore improve system performance.