Proactive Spectrum Monitoring for Suspicious Wireless Powered Communications in Dynamic Spectrum Sharing Networks  

作　　者：Yu Zhang Guojie Hu Yueming Cai 

机构地区：[1]College of Communications Engineering,Army of Engineering University,Nanjing 210007,China [2]Sixtythird Research Institute,National University of Defense Technology,Nanjing 210007,China [3]Rocket Force University of Engineering,Xi’an 710025,China

出　　处：《China Communications》2021年第12期119-138,共20页中国通信（英文版）

基　　金：the Natural Science Foun-dations of China(No.62171464,61771487);the Defense Science Foundation of China(No.2019-JCJQ-JJ-221).

摘　　要：This paper studies the proactive spec-trum monitoring with one half-duplex spectrum moni-tor(SM)to cope with the potential suspicious wireless powered communications(SWPC)in dynamic spec-trum sharing networks.The jamming-assisted spec-trum monitoring scheme via spectrum monitoring data(SMD)transmission is proposed to maximize the sum ergodic monitoring rate at SM.In SWPC,the suspi-cious communications of each data block occupy mul-tiple independent blocks,with a block dedicated to the wireless energy transfer by the energy-constrained suspicious nodes with locations in a same cluster(symmetric scene)or randomly distributed(asymmet-ric scene)and the remaining blocks used for the in-formation transmission from suspicious transmitters(STs)to suspicious destination(SD).For the sym-metric scene,with a given number of blocks for SMD transmission,namely the jamming operation,we first reveal that SM should transmit SMD signal(jam the SD)with tolerable maximum power in the given blocks.The perceived suspicious signal power at SM could be maximized,and thus so does the correspond-ing sum ergodic monitoring rate.Then,we further reveal one fundamental trade-off in deciding the op-timal number of given blocks for SMD transmission.For the asymmetric scene,a low-complexity greedy block selection scheme is proposed to guarantee the optimal performance.Simulation results show that the jamming-assisted spectrum monitoring schemes via SMD transmission achieve much better perfor-mance than conventional passive spectrum monitor-ing,since the proposed schemes can obtain more accu-rate and effective spectrum characteristic parameters,which provide basic support for fine-grained spectrum management and a solution for spectrum security in dynamic spectrum sharing network.

关 键 词：proactive spectrum monitoring sum er-godic monitoring rate jamming-assisted proactive spectrum monitoring HALF-DUPLEX fundamental trade-off dynamic spectrum sharing network 

分 类 号：TN925[电子电信—通信与信息系统]