可见光通信物理链路的基准保密容量比较研究  

Comparative Research of Benchmark Security Capacity of Visible Light Communication Physical Links

作　　者：丁举鹏 易芝玲 王劲涛[3] 阳辉[3] DING Jupeng;YI Zhiling;WANG Jintao;YANG Hui(Xinjiang Autonomous Region Key Laboratory of Signal Detection and Information Processing,School of Information Science and Engineering,Xinjiang University,Urumqi 830046,China;China Mobile Research Institute,Beijing 100053,China;Beijing National Research Center for Information Science and Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]新疆大学信息科学与工程学院信号检测与信息处理自治区重点实验室,乌鲁木齐830046 [2]中国移动通信研究院,北京100053 [3]清华大学北京信息科学与技术国家研究中心,北京100084

出　　处：《信息网络安全》2020年第5期65-71,共7页Netinfo Security

基　　金：国家自然科学基金[61401420];新疆维吾尔自治区自然科学基金面上项目[2019D01C020];新疆维吾尔自治区全职引进高层次创新人才项目[042419004];新疆维吾尔自治区天池博士计划[04231200728];新疆大学自然科学基金[62031224624]。

摘　　要：在5G演进过程中,可见光通信的物理层安全问题逐渐受到关注与讨论。然而,现有研究范式尚局限于基于传统朗伯型LED光源的可见光通信保密链路的讨论,对于实际商用非朗伯光源下链路的保密特性,特别是非朗伯链路配置下的基准保密容量,尚缺少量化比较研究。针对上述问题,文章延伸了已有可见光保密链路建模方案;量化展示了室内环境下,典型非朗伯可见光保密链路的基准特性差异。量化结果显示,相比较传统朗伯波束情况,典型非朗伯波束可将基准保密容量的空间动态范围从0~10.78 bps/Hz压缩至0~6.40 bps/Hz,相应地基准保密容量均值从初始的5.25 bps/Hz减少至2.78bps/Hz。因此,在设计及优化可见光通信保密链路过程中,应综合考虑光源多样波束特性对保密容量的影响,可将其作为潜在的优化维度。In the process of 5 G evolution,the physical layer security of visible light communication(VLC) is gradually earning attention and discussion.However,the current research paradigm is limited to the discussion of visible light communication secure link based on conventional Lambertian LED sources,and there is no quantitative comparative study on the link security characteristics of commercial non-Lambertian sources,especially the benchmark security capacity under non-Lambertian link configurations.In view of the above problems,this paper extends the existent VLC security link modeling scheme,and quantifies the benchmark characteristics of typical non-Lambertian VLC security links within typical indoor environment.The numerical results show that compared with the conventional Lambert beam,the typical non Lambert beams could compress the spatial dynamic range of the benchmark security capacity from 0~10.78 bps/Hz to 0~6.40 bps/Hz,and the relevant mean value is dramatically reduced from the original 5.25 bps/Hz to 2.78 bps/Hz.Therefore,in the design and optimization of the VLC links,the influence of diverse source beams on the secrecy capacity characteristics should be considered,which could be viewed as a potential optimization dimension.

关 键 词：物理层安全 可见光通信 保密容量 光波束 非朗伯波束 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]