D2D带内通信的模式选择和频谱划分：物理层安全观点
Mode Selection and Spectrum Partition for D2D Inband Communications: A Physical Layer Security Perspective
摘要：
本文从物理层安全（PLS）的角度研究了蜂窝网络中带内设备到设备（D2 D）通信的模式选择和频谱划分的基本问题。我们考虑允许每个D2 D对概率性地在蜂窝和覆盖模式之间切换的模式选择方案，以及其中系统频谱在蜂窝和覆盖D2 D通信之间正交划分的频谱划分方案。我们首先开发了一个通用的理论框架来模拟蜂窝用户的保密中断/保密容量性能和D2 D对的中断/容量性能，并进行性能优化，以确定最佳的模式选择和频谱划分，以实现保密容量最大化和保密中断概率最小化。最后，通过一个案例研究，展示了该理论框架在性能建模和优化中的应用，并说明了模式选择和频谱划分对带内D2 D通信PLS性能的影响。
英文摘要：
This paper investigates from the physical layer security (PLS) perspective the fundamental issues of mode selection and spectrum partition in cellular networks with inband device-to-device (D2D) communication. We consider a mode selection scheme allowing each D2D pair to probabilistically switch between the underlay and overlay modes, and also a spectrum partition scheme where the system spectrum is orthogonally partitioned between cellular and overlay D2D communications. We first develop a general theoretical framework to model both the secrecy outage/secrecy capacity performance of cellular users and outage/capacity performance of D2D pairs, and to conduct performance optimization to identify the optimal mode selection and spectrum partition for secrecy capacity maximization and secrecy outage probability minimization. A case study is then provided to demonstrate the application of our theoretical framework for performance modeling and optimization, and also to illustrate the impacts of mode selection and spectrum partition on the PLS performances of inband D2D communications.
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