电讯技术2025，Vol.65Issue(9)：1496-1503,8.DOI:10.20079/j.issn.1001-893x.240429002
基于半双工机制的主动监听方案设计与优化
Design and Optimization of Proactive Eavesdropping Scheme Based on Half-duplex Mechanism
摘要
Abstract
A proactive eavesdropping scheme based on a half-duplex mechanism is proposed for the broadcast communication scenarios of suspicious users via time division multiple access(TDMA).In this scheme,the legitimate monitor intercepts more suspicious information by proactively jamming the certain suspicious transmission time slots,which induces the suspicious users to increase the transmission power in other time slots.In order to achieve this,an approach is taken to jointly optimize the jamming power allocation and jamming sets of legitimate monitor to maximize the total average eavesdropping rate.Given the constructed non-convex optimization problem,a two-stage joint optimization algorithm is proposed.In the first stage,the jamming power allocation is optimized by fixing the jamming sets,and then the non-convex problem is transformed and solved by applying successive convex approximation(SCA)and standard convex optimization techniques.In the second stage,a low-complexity heuristic jamming sets selection method is proposed.Simulation results show that the proposed proactive eavesdropping scheme not only has low complexity but also achieves a significantly better total average eavesdropping rate than other benchmark schemes when the jamming power is 26～45 dB.关键词
广播通信/主动监听/半双工Key words
broadcast communication/proactive eavesdropping/half-duplex分类
信息技术与安全科学引用本文复制引用
廖嘉诚,朱丰超,胡国杰..基于半双工机制的主动监听方案设计与优化[J].电讯技术,2025,65(9):1496-1503,8.基金项目
国家自然科学基金资助项目(62071480) （62071480）
