基于区块链技术的安全频谱感知算法  

A secure spectrum sensing algorithm based on blockchain technology

作　　者：黄堂森 李小武 尹向东 肖孚安 HUANG Tangsen;LI Xiaowu;YIN Xiangdong;XIAO Fuan(School of Electronics and Information Engineering,Hunan University of Science and Engineering,Yongzhou,Hunan 425199,China)

机构地区：[1]湖南科技学院电子与信息工程学院,湖南永州425199

出　　处：《光电子．激光》2021年第12期1353-1358,共6页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金面上项目(62172159);国家自然科学基金青年项目(62102147);湖南省社科评审委项目(XSP22YBC510);湖南省杰出青年基金项目(2020JJ2015);湖南省自然科学基金项目(2019JJ40097,2019JJ40096,2021JJ30294);湖南省教育厅青年项目(20B247);湖南科技学院应用特色学科建设项目资助(湘科院校发[2018]83号)资助项目。

摘　　要：在认知无线电网络中,为提升安全性能和感知效率,提出了一种基于区块链技术的安全频谱感知算法。该算法先对感知节点的可靠度进行评估,通过评估算法得到节点的初始信赖值,并以初始信赖值为基数,融合中心会依据环境的变化对节点的信赖值定期更新。更新后的信赖值存储在区块链的管理中心,区块链的管理中心对节点信息加密,一个节点与其自身信赖值构成一一映射。认知无线电网络执行频谱感知时,融合中心选择信赖值高的有限个节点参与协作感知,这可在提升感知准确度的同时降低能量开销,并增强认知无线电网络的鲁棒性。仿真实验结果表明本文中的感知算法性能远优于传统算法,在相同实验条件下,感知准确度提升5%,能耗降低了12%,极大增强了认知网络的鲁棒性和频谱感知的安全性。In cognitive radio networks,in order to improve the security performance and sensing efficiency,a secure spectrum sensing algorithm based on blockchain technology is proposed.The algorithm first evaluates the reliability of the sensing node,and obtains the initial trust value of the node through the evaluation algorithm.Based on the initial trust value,the fusion center will update the trust value of the node regularly according to the change of the environment.The updated trust value is stored in the management center of the blockchain.The management center of the blockchain encrypts the node information,and a node and its own trust value form a one-to-one mapping.When cognitive radio networks perform spectrum sensing,the fusion center selects a limited number of nodes with high trust value to participate in cooperative sensing,which can improve the accuracy of sensing,reduce the energy cost and enhance the robustness of cognitive radio networks.Simulation results show that the performance of the proposed algorithm is much better than that of the traditional algorithm.Under the same experimental conditions,the sensing accuracy is improved by 5%,and the energy consumption is reduced by 12%,which greatly enhances the robustness of cognitive network and the security of spectrum sensing.

关 键 词：数值逼近与分析 区块链 能量效率 加密 

分 类 号：TN913.7[电子电信—通信与信息系统]