诺玛
计算机科学
保密
水准点(测量)
服务质量
蒙特卡罗方法
中断概率
传输(电信)
数学优化
计算机网络
衰退
算法
电信
数学
统计
电信线路
解码方法
计算机安全
大地测量学
地理
作者
Hongjiang Lei,Fangtao Yang,Hongwu Liu,Imran Shafique Ansari,Kyeong Jin Kim,Theodoros A. Tsiftsis
标识
DOI:10.1109/twc.2023.3275946
摘要
Semi-grant-free (SGF) transmission scheme enables grant-free (GF) users to utilize resource blocks allocated for grant-based (GB) users while maintaining the quality of service of GB users. This work investigates the secrecy performance of non-orthogonal multiple access (NOMA)-aided SGF systems. First, analytical expressions for the exact and asymptotic secrecy outage probability (SOP) of NOMA-aided SGF systems with a single GF user are derived. Then, the SGF systems with multiple GF users and the best-user scheduling scheme is considered. By utilizing order statistics theory, analytical expressions for the exact and asymptotic SOP are derived. Monte Carlo simulation results are provided and compared with two benchmark schemes. The effects of system parameters on the SOP of the considered system are demonstrated and the accuracy of the developed analytical results is verified. The results indicate that both the outage target rate for GB and the secure target rate for GF are the main factors of the secrecy performance of SGF systems.
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