In cognitive ratio networks

the enthusiasm of Secondary Users’（SU）participation in spectrum sensing is low and the untrusted data is sent from SU to the Fusion Center（FC）due to the poor channel condition.Considering these problems

a cooperative spectrum sensing algorithm based on Reverse Auction Technology（RAT）-Reverse Auction is proposed in this paper.This article refers to the incentive mechanism of RAT.The user is divided into ordinary secondary users and relay secondary users.The use of RAT between these two secondary users encourages the secondary users to participate in the spectrum perception to solve the problem of the lower initiative of SU

and the problem of channel condition difference can be solved by means of relay.The simulation results show that the sensitivity of the proposed method is better than the non-relay method

and the user’s enthusiasm is improved.