摘要
针对物联网无线携能通信系统中能量输送和信息传输的差异性需求,提出了一种"信息-能量"动态切换的机会安全传输方案。首先,考虑多小区、多用户、多窃听者的时域切换型携能通信网络模型,发送端根据信道状态在能量输送与信息传输之间动态切换,改变了传统能量输送与信息传输的固定分配方案,从而满足能量输送和信息传输的差异性需求。在此基础上,综合分析了能量传输和信息传输的性能,包括能量传输的稳定性和效率以及在窃听者独立窃听、联合窃听场景下信息传输的可靠性和安全性。然后,分析了切换门限对系统性能的影响,并在能量约束条件下,为兼顾系统安全性和可靠性,设计了最大化保密吞吐量的切换门限优化算法。最后,仿真证明了所提方案的有效性。
Aiming at the different requirements of energy transmission and information transmission in simultaneous wireless information and power transfer(SWIPT),an opportunistic transmission scheme was proposed for enhancing physical layer security.Firstly,a SWIPT network with multi-cells was considered where multi-users,multi-eavesdroppers and the users were assumed to adopt time-switching based receivers and employ non-linear conversion model to harvest energy.The transmitter could dynamically switch between information transmission and power transfer according to the channel state,breaking the traditional fixed slot allocation scheme of energy transmission and information transmission.On this basis,the performances of energy transmission and information transmission were analyzed comprehensively,including the stability and efficiency of energy transmission,and the reliability and security of information transmission in the scenario of independent eavesdropping and joint eavesdropping.Next,a switching threshold optimization model was given to maximize its secrecy throughput under the constraint of the energy transmission,the reliability and secrecy performance requirements of information transmission.Finally,simulation results verify the validity of the proposed scheme.
作者
马克明
陈亚军
胡鑫
黄开枝
季新生
MA Keming;CHEN Yajun;HU Xin;HUANG Kaizhi;JI Xinsheng(National Digital Switching System Engineering & Technological Research Center,Zhengzhou 450002,China)
出处
《通信学报》
EI
CSCD
北大核心
2019年第2期70-81,共12页
Journal on Communications
基金
国家重点研发计划基金资助项目(No.2017YFB0801903)
国家自然科学基金资助项目(No.61401510
No.61521003
No.61501516
No.61701538
No.61871404)~~
关键词
无线携能通信
物理层安全
保密吞吐量
中断概率
机会传输
simultaneous wireless information and power transfer
physical layer security
secrecy throughput
outage probability
opportunistic transmission
