This paper analyzes the Secrecy Transmission Capacity (STC) over wireless networks, where the legitimate nodes and eavesdroppers are distributed following Poisson point processes. Based on the tools of stochastic geometry, we first derive the Connection Outage Probability (COP) and the bounds of the Secrecy Outage Probability (SOP), and establish a theoretical framework for analyzing STC under the Nearest Receiver Transmission (NRT) model. Different from existing works that provided only a method of calculating COP, SOP and STC, in this paper, we introduce two types of schemes (Legitimate Protected Zone (LPZ) and Localized Interferers Selection (LIS)) to decrease COP, SOP and increase STC. Extensive simulations are carried out to validate the findings of our theoretical analyses. Compared to the existing schemes, the results here indicate that the designed LPZ and LIS are effective in achieving a higher STC, and we also outline their application scenarios and deficiencies.

本文分析了无线网络上的保密传输容量（STC），其中合法节点和窃听者根据Poisson点过程进行分发。基于随机几何工具，我们首先导出连接中断概率（COP）和保密中断概率（SOP）的范围，并建立一个用于在最近接收方传输（NRT）模型下分析STC的理论框架。与现有的仅提供一种计算COP，SOP和STC的方法的工作不同，在本文中，我们介绍了两种类型的方案（合法保护区（LPZ）和本地干扰源选择（LIS））来降低COP，SOP和增加STC 。进行了广泛的仿真，以验证我们理论分析的结果。与现有方案相比，