中文摘要：

D2D（Device-to-Device）通信因其具有提高频谱效率、时延小和能耗低等优点,被认为是第五代移动通信系统中的关键技术之一。然而,由于D2D用户与蜂窝用户共享频谱,导致D2D用户之间传输的信息会泄露给蜂窝用户。针对这一问题,基于物理层安全的研究,结合D2D通信的特点,提出了一种最小化D2D用户泄露信息量的算法。通过选取最优D2D链路的方法,使得系统的总泄露信息量达到最小。仿真表明所提倡的方法能极大改善系统的总泄露信息量。

英文摘要：

The Device-to-Device communications have been envisioned as one of the key technologies for the fifth-generation mobile communication systems due to its advantages such as higher spectral efficiency,low time latency,and energy consumption,etc.However,as D2 D users share spectrum with cellular users,the information transmitted between D2 D users may be leaked to cellular users.In order to solve this problem,this paper proposes an algorithm to minimize the leakage information amount of D2 D links by exploring the physical layer characteristics of D2 D communications.Specifically,the minimum leakage information amount is achieved by selecting the optimal D2 D links. The simulation results show that the proposed algorithm can significantly control the total leakage information amount of the system.