基于放大转发和协作拥塞的窄带物联网物理层安全容量研究

发布时间：2018-04-21 09:55

本文选题：窄带物联网 + 物理层安全　；参考：《传感技术学报》2017年04期

【摘要】：基于蜂窝的窄带物联网NB-IoT(Narrow Band Internet of Things)技术发展迅猛,随着节点数目的急剧增加及窄带无线网络的开放性,其安全问题面临严重的挑战。针对NB-IoT的不可信或窃听节点会带来严重安全威胁的问题,利用其上下行信道状态可知和半双工的特性,提出利用中继节点地放大转发、协作拥塞及联合协作保障物理层安全。放大转发节点对源信号进行放大和转发,协作拥塞节点发射干扰信号,调整波束赋形因子和功率使干扰到达目的节点为零而到达窃听者非零。仿真表明,中继节点所带来的分集增益能显著改善接收节点的信号质量,提升5倍安全容量,在不需要加密算法的情况下,确保窃听者无法获取有用信息,保证信息传输的安全。安全容量是指合法接收端可以正确接收,而窃听者即无法获取信息的最大可达通信速率。
[Abstract]:The technology of NB-IoT(Narrow Band Internet of things based on cellular is developing rapidly. With the rapid increase of the number of nodes and the openness of narrowband wireless network, its security is facing serious challenges. Aiming at the serious security threat caused by the untrusted or eavesdropping nodes of NB-IoT, this paper uses the characteristics of uplink and downlink channels to know and half-duplex, and proposes to use relay nodes to amplify forwarding, cooperative congestion and joint cooperation to ensure physical layer security. The amplifying and forwarding node amplifies and forwards the source signal, the cooperative congestion node transmits the interference signal, and adjusts the beamforming factor and power so that the interference reaches zero at the destination node and non-zero at the eavesdropping node. Simulation results show that the diversity gain brought by the relay node can significantly improve the signal quality of the receiving node, increase the security capacity by 5 times, and ensure that the eavesdropper can not obtain useful information without the need of encryption algorithm. Ensure the safety of information transmission. Security capacity means that the legitimate receiver can receive it correctly, but the eavesdropper can not get the information.
【作者单位】：浙江工业大学信息工程学院;诺基亚通信系统技术有限公司;浙江理工大学机械与自动控制学院;
【基金】：国家自然科学基金青年基金项目(61304256) 浙江省科技厅公益项目(2017C33153,2016C33034)
【分类号】：TN929.5;TP391.44;TN918

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