星地融合网络中的安全协作传输策略与性能分析

Secrecy Cooperative Transmission Strategy and Performance Analysis of Integrated Satellite-Terrestrial Relay Networks

针对星地融合网络中的安全协作传输策略与性能分析问题,提出了联合中继选择与用户调度策略,研究了其对星地融合网络的影响.同时针对协作窃听场景,所有用户相互合作协作窃听主用户信息的问题,得到了基于该窃听方案下的联合中继选择与用户调度策略下系统的安全性能的准确闭式表达式.为进一步获取高信噪比下不同的系统参数对于系统性能的影响,得到并分析了高信噪比下系统的安全性能.最后,蒙特卡洛仿真验证了方案的正确性.

Focusing on the secrecy cooperative transmission strategy and performance analysis in integrated satellite-terrestrial relay networks(ISTRNs),we propose a novel terrestrial relay selection and user scheduling scheme and investigate the impact of the proposed schemes on the ISTRNs.Moreover,we consider colluding case,i.e.the eavesdroppers cooperate with each other and wiretap the information together.In addition,we derive the closed-form expressions for the secrecy outage probability(SOP)and average secrecy capacity(ASC)of the considered ISTRNs in the presence of the considered eavesdropping case.Besides,to get further insights of the system parameters on the system performance,asymptotic expressions for the SOP and ASC are also derived under the considered case.Finally,representative Monte Carlo(MC)simulation results are provided to verify the correctness of the proposed strategy.