Random cellular networks and stochastic geometry

In this chapter, we discuss the physical layer security in stochastic geometric networks. We first present the randomness of cellular networks deployment, and summarize the challenges to solve the physical layer security issue. We then introduce some primary knowledge of stochastic geometry theory, especially some useful properties of Poisson point process, which will be extensively used in the following chapters. It is concluded that various random wireless networks can be modeled and analyzed using the framework of stochastic geometry. Moreover, we introduce the network security performance metrics to evaluate the physical layer security. Finally, we provide a brief survey of recent researches on physical layer security in wireless networks, and introduce three open problems in this field which we are going to deal with in the following chapters.