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马彬,郭云霄,谢显中.认知异构无线网络中可信频谱切换机制[J].重庆邮电大学学报(自然科学版),2020,32(3):385-393. 本文二维码信息
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认知异构无线网络中可信频谱切换机制
Trusted spectrum handoff mechanism in cognitive heterogeneous wireless networks
投稿时间:2018-12-02  修订日期:2019-12-30
DOI: 10.3979/j.issn.1673-825X.2020.03.007
中文关键词:  认知无线电  频谱切换  信誉系统
English Keywords:cognitive radio  spectrum handoff  reputation system
基金项目:国家自然科学基金(61471076,61601070);重庆市基础研究与前沿探索项目(cstc2018jcyjAX0432);重庆市教委科学技术研究重大项目(KJZD-M 201900602);重庆邮电大学博士启动基金(A2015-16)
作者单位E-mail
马彬 重庆邮电大学 移动通信技术重庆市重点实验室,重庆 400065 mab_cqupt@sina.com 
郭云霄 重庆邮电大学 移动通信技术重庆市重点实验室,重庆 400065
重庆邮电大学 通信与信息工程学院,重庆 400065 
gyx201601@163.com 
谢显中 重庆邮电大学 通信与信息工程学院,重庆 400065 xiexzh@cqupt.edu.cn 
摘要点击次数: 115
全文下载次数: 63
中文摘要:
      在认知异构无线网络中,针对频谱切换过程中次用户发生自私或恶意行为,导致网络性能下降的问题,提出一种基于信誉系统的频谱切换机制。通过提取用户行为特征信息,评估次用户接入信道后的行为,并依据次用户的行为确定其信誉值,在认知基站建立信誉系统。根据次用户的信誉状况来对次用户进行分级,并根据分级情况,为次用户分配授权信道或共享频段的信道。在可信次用户接入授权频谱的过程中,当满足用户等待时延要求时,信誉值高的次用户有更高的接入优先权。可疑次用户可以在共享频段中进行传输。仿真结果表明,算法能够有效地提升系统吞吐量,降低切换及中断概率,减少低信誉次用户接入授权频谱的机会,提升了系统的安全性。
English Summary:
      In cognitive heterogeneous wireless networks, a spectrum handoff mechanism based on reputation system is proposed. This mechanism is to solve the problem of network performance degradation caused by selfishness or malicious behavior of secondary users in spectrum handoff. Firstly,by extracting the user characteristic information,the behavior of the secondary users after accessing the channel is evaluated. According to the behavior of the secondary users,the reputation is calculated, thereby establishing a reputation system in the cognitive base station. Then, the secondary users are ranked according to the reputation status, and the licensed channels or channels of the ISM band are allocated to the secondary users according to their ranking. In the process of accessing the licensed spectrum,when the trusted user meets waiting delay requirement,the secondary user with a high reputation value has a higher access priority.Suspicious secondary users can transmit in the ISM band.Simulation results show that the proposed method can effectively improve the system throughput,reduce the handoff and interrupt probability, reduce the chance of low-reputation secondary users to access the licensed spectrum, and improve the security of the system.
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